From 182118ebff0c7f74cf854904c7efad92c1056b90 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 14:32:37 -0500
Subject: [PATCH 01/20] Standardize main/module package.json props

- Replace non-standard `jsnext:main` with proposed `module` prop
- Use `index.js` for all `module` values
- Use `dist` files for all `main` values
---
 packages/tko.bind/package.json                   | 3 ++-
 packages/tko.binding.component/package.json      | 3 ++-
 packages/tko.binding.core/package.json           | 2 +-
 packages/tko.binding.foreach/package.json        | 3 ++-
 packages/tko.binding.if/package.json             | 2 +-
 packages/tko.binding.template/package.json       | 2 +-
 packages/tko.computed/package.json               | 3 ++-
 packages/tko.filter.punches/package.json         | 2 +-
 packages/tko.lifecycle/package.json              | 2 +-
 packages/tko.observable/package.json             | 3 ++-
 packages/tko.provider.attr/package.json          | 3 ++-
 packages/tko.provider.bindingString/package.json | 3 ++-
 packages/tko.provider.component/package.json     | 3 ++-
 packages/tko.provider.databind/package.json      | 3 ++-
 packages/tko.provider.multi/package.json         | 3 ++-
 packages/tko.provider.mustache/package.json      | 4 ++--
 packages/tko.provider.virtual/package.json       | 3 ++-
 packages/tko.provider/package.json               | 3 ++-
 packages/tko.utils.component/package.json        | 3 ++-
 packages/tko.utils.parser/package.json           | 3 ++-
 packages/tko.utils/package.json                  | 2 +-
 21 files changed, 36 insertions(+), 22 deletions(-)

diff --git a/packages/tko.bind/package.json b/packages/tko.bind/package.json
index f0190944..b428eed0 100644
--- a/packages/tko.bind/package.json
+++ b/packages/tko.bind/package.json
@@ -2,7 +2,8 @@
   "name": "tko.bind",
   "version": "1.0.0",
   "description": "TKO DOM-Observable Binding",
-  "main": "index.js",
+  "main": "dist/tko.bind.js",
+  "module": "index.js",
   "dependencies": {
     "tko.computed": "knockout/tko.computed",
     "tko.lifecycle": "knockout/tko.lifecycle",
diff --git a/packages/tko.binding.component/package.json b/packages/tko.binding.component/package.json
index df04065b..66b83b1c 100644
--- a/packages/tko.binding.component/package.json
+++ b/packages/tko.binding.component/package.json
@@ -2,7 +2,8 @@
   "name": "tko.binding.component",
   "version": "1.0.0",
   "description": "component: binding for web components",
-  "main": "index.js",
+  "main": "dist/tko.binding.component.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": { "frameworks": ["jasmine"]}
 }
diff --git a/packages/tko.binding.core/package.json b/packages/tko.binding.core/package.json
index 416ce651..499feab7 100644
--- a/packages/tko.binding.core/package.json
+++ b/packages/tko.binding.core/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO Core bindings",
   "main": "dist/tko.binding.core.js",
-  "jsnext:main": "./index.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.binding.foreach/package.json b/packages/tko.binding.foreach/package.json
index 26eddade..83f2ba65 100644
--- a/packages/tko.binding.foreach/package.json
+++ b/packages/tko.binding.foreach/package.json
@@ -2,7 +2,8 @@
   "name": "tko.binding.foreach",
   "version": "4.0.0-alpha2",
   "description": "Knockout Foreach Binding",
-  "main": "index.js",
+  "main": "dist/tko.binding.foreach.js",
+  "module": "index.js",
   "scripts": {
     "test": "gulp test --once"
   },
diff --git a/packages/tko.binding.if/package.json b/packages/tko.binding.if/package.json
index 1ce0de1c..b8390ebe 100644
--- a/packages/tko.binding.if/package.json
+++ b/packages/tko.binding.if/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO conditional (if/ifnot/unless/with/else) bindings",
   "main": "dist/tko.binding.if.js",
-  "jsnext:main": "./index.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.binding.template/package.json b/packages/tko.binding.template/package.json
index 1d2f7493..bd59a380 100644
--- a/packages/tko.binding.template/package.json
+++ b/packages/tko.binding.template/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO Template bindings",
   "main": "dist/tko.binding.template.js",
-  "jsnext:main": "./index.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.computed/package.json b/packages/tko.computed/package.json
index 9d7645cc..d5fbdbf9 100644
--- a/packages/tko.computed/package.json
+++ b/packages/tko.computed/package.json
@@ -2,7 +2,8 @@
   "name": "tko.computed",
   "version": "1.0.0",
   "description": "TKO Computed Observables",
-  "main": "index.js",
+  "main": "dist/tko.computed.js",
+  "module": "index.js",
   "dependencies": {
     "tko.utils": "knockout/tko.utils",
     "tko.observable": "knockout/tko.observable"
diff --git a/packages/tko.filter.punches/package.json b/packages/tko.filter.punches/package.json
index 700084aa..547c1a5f 100644
--- a/packages/tko.filter.punches/package.json
+++ b/packages/tko.filter.punches/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO filters from knockout punches",
   "main": "dist/tko.filter.punches.js",
-  "jsnext:main": "./index.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.lifecycle/package.json b/packages/tko.lifecycle/package.json
index a1f8c9d9..3816ef1a 100644
--- a/packages/tko.lifecycle/package.json
+++ b/packages/tko.lifecycle/package.json
@@ -13,7 +13,7 @@
   "version": "1.0.0",
   "description": "Knockout LifeCycle for object instances",
   "main": "dist/tko.lifecycle.js",
-  "jsnext:main": "index.js",
+  "module": "index.js",
   "repository": "git@github.com:knockout/tko.lifecycle.git",
   "author": "Knockout Team",
   "license": "MIT",
diff --git a/packages/tko.observable/package.json b/packages/tko.observable/package.json
index cc04c6e9..b00cb788 100644
--- a/packages/tko.observable/package.json
+++ b/packages/tko.observable/package.json
@@ -2,7 +2,8 @@
   "name": "tko.observable",
   "version": "0.1.0",
   "description": "TKO subscribables and observables",
-  "main": "index.js",
+  "main": "dist/tko.observable.js",
+  "module": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
diff --git a/packages/tko.provider.attr/package.json b/packages/tko.provider.attr/package.json
index 6b19d921..c6309186 100644
--- a/packages/tko.provider.attr/package.json
+++ b/packages/tko.provider.attr/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.attr",
   "version": "1.0.0",
   "description": "Link HTML attributes (e.g. ko-handler-name) to binding handlers",
-  "main": "index.js",
+  "main": "dist/tko.provider.attr.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": {"frameworks":["mocha","chai"]}
 }
diff --git a/packages/tko.provider.bindingString/package.json b/packages/tko.provider.bindingString/package.json
index 44b78780..cf618f59 100644
--- a/packages/tko.provider.bindingString/package.json
+++ b/packages/tko.provider.bindingString/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.bindingString",
   "version": "1.0.0",
   "description": "Abstract Base Class for providers that parse a binding string",
-  "main": "index.js",
+  "main": "dist/tko.provider.bindingString.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.component/package.json b/packages/tko.provider.component/package.json
index b009c65b..5a660dcf 100644
--- a/packages/tko.provider.component/package.json
+++ b/packages/tko.provider.component/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.component",
   "version": "1.0.0",
   "description": "Bind custom web components e.g. <custom-binding>",
-  "main": "index.js",
+  "main": "dist/tko.provider.component.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": {"frameworks": ["jasmine"]}
 }
diff --git a/packages/tko.provider.databind/package.json b/packages/tko.provider.databind/package.json
index e9faab5c..e9b1f382 100644
--- a/packages/tko.provider.databind/package.json
+++ b/packages/tko.provider.databind/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.databind",
   "version": "1.0.0",
   "description": "Link HTML attributes based on a `data-bind` HTML attribute",
-  "main": "index.js",
+  "main": "dist/tko.provider.databind.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.provider.multi/package.json b/packages/tko.provider.multi/package.json
index 4501d7db..9747a9c7 100644
--- a/packages/tko.provider.multi/package.json
+++ b/packages/tko.provider.multi/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.multi",
   "version": "1.0.0",
   "description": "Combine multiple other providers into one",
-  "main": "index.js",
+  "main": "dist/tko.provider.multi.js",
+  "module": "index.js",
   "license": "MIT",
   "karma":{"frameworks":["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.mustache/package.json b/packages/tko.provider.mustache/package.json
index e1c58d3d..986efb28 100644
--- a/packages/tko.provider.mustache/package.json
+++ b/packages/tko.provider.mustache/package.json
@@ -2,8 +2,8 @@
   "name": "tko.provider.mustache",
   "version": "0.1.0",
   "description": "Interpolate text/node attributes {{ }}",
-  "main": "dist/tko.preprocessor.textInterpolation.js",
-  "jsnext:main": "./index.js",
+  "main": "dist/tko.preprocessor.mustache.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.provider.virtual/package.json b/packages/tko.provider.virtual/package.json
index 2486bedf..0dbe6d83 100644
--- a/packages/tko.provider.virtual/package.json
+++ b/packages/tko.provider.virtual/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider.virtual",
   "version": "1.0.0",
   "description": "Binding provider for <!-- ko handler: ... --> virtual elements",
-  "main": "index.js",
+  "main": "dist/tko.provider.virtual.js",
+  "module": "index.js",
   "author": "Knockout Team",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "chai"]}
diff --git a/packages/tko.provider/package.json b/packages/tko.provider/package.json
index 5a600007..b4ac34e8 100644
--- a/packages/tko.provider/package.json
+++ b/packages/tko.provider/package.json
@@ -2,7 +2,8 @@
   "name": "tko.provider",
   "version": "1.0.0",
   "description": "Abstract base class of tko Provider (HTML <-> Data Binding linker)",
-  "main": "index.js",
+  "main": "dist/tko.provider.js",
+  "module": "index.js",
   "author": "Knockout Team",
   "license": "MIT",
   "karma" : { "frameworks": ["mocha", "chai"] }
diff --git a/packages/tko.utils.component/package.json b/packages/tko.utils.component/package.json
index 7bdc7bf9..5c8e2fb6 100644
--- a/packages/tko.utils.component/package.json
+++ b/packages/tko.utils.component/package.json
@@ -2,7 +2,8 @@
   "name": "tko.utils.component",
   "version": "1.0.0",
   "description": "Registry and loading utilities for web components",
-  "main": "index.js",
+  "main": "dist/tko.utils.component.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": {"frameworks":["jasmine"]}
 }
diff --git a/packages/tko.utils.parser/package.json b/packages/tko.utils.parser/package.json
index 1f0b01d1..24f12e6f 100644
--- a/packages/tko.utils.parser/package.json
+++ b/packages/tko.utils.parser/package.json
@@ -2,7 +2,8 @@
   "name": "tko.utils.parser",
   "version": "1.0.0",
   "description": "Parse the Javascript-like language used in data-bind and other HTML attributes (CSP-safe)",
-  "main": "index.js",
+  "main": "dist/tko.utils.parser.js",
+  "module": "index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.utils/package.json b/packages/tko.utils/package.json
index 93e92dc3..42f9797a 100644
--- a/packages/tko.utils/package.json
+++ b/packages/tko.utils/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "TKO Utilities",
   "main": "dist/tko.utils.js",
-  "jsnext:main": "./index.js",
+  "module": "index.js",
   "files": [
     "dist/",
     "src/",

From ec9b910f9e49095473395512278543026943aea9 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 15:15:02 -0500
Subject: [PATCH 02/20] Move index.js files into src dirs, move root index.js
 to packages/knockout

---
 packages/knockout/index.js                    |  0
 index.js => packages/knockout/src/index.js    |  0
 packages/tko.bind/index.js                    |  6 ---
 packages/tko.bind/package.json                |  2 +-
 packages/tko.bind/src/index.js                |  6 +++
 packages/tko.binding.component/index.js       |  3 --
 packages/tko.binding.component/package.json   |  2 +-
 packages/tko.binding.component/src/index.js   |  3 ++
 packages/tko.binding.core/index.js            | 47 -------------------
 packages/tko.binding.core/package.json        |  2 +-
 packages/tko.binding.core/src/index.js        | 47 +++++++++++++++++++
 packages/tko.binding.foreach/package.json     |  2 +-
 .../tko.binding.foreach/{ => src}/index.js    |  2 +-
 packages/tko.binding.if/package.json          |  2 +-
 packages/tko.binding.if/{ => src}/index.js    |  2 +-
 packages/tko.binding.template/package.json    |  2 +-
 .../tko.binding.template/{ => src}/index.js   | 12 ++---
 packages/tko.computed/package.json            |  2 +-
 packages/tko.computed/{ => src}/index.js      |  4 +-
 packages/tko.filter.punches/package.json      |  2 +-
 .../tko.filter.punches/{ => src}/index.js     |  0
 packages/tko.lifecycle/index.js               |  3 --
 packages/tko.lifecycle/package.json           |  2 +-
 packages/tko.lifecycle/src/index.js           |  3 ++
 packages/tko.observable/index.js              | 21 ---------
 packages/tko.observable/package.json          |  2 +-
 packages/tko.observable/src/index.js          | 21 +++++++++
 packages/tko.provider.attr/index.js           |  1 -
 packages/tko.provider.attr/package.json       |  2 +-
 packages/tko.provider.attr/src/index.js       |  1 +
 packages/tko.provider.bindingString/index.js  |  1 -
 .../tko.provider.bindingString/package.json   |  2 +-
 .../tko.provider.bindingString/src/index.js   |  1 +
 packages/tko.provider.component/index.js      |  1 -
 packages/tko.provider.component/package.json  |  2 +-
 packages/tko.provider.component/src/index.js  |  1 +
 packages/tko.provider.databind/index.js       |  1 -
 packages/tko.provider.databind/package.json   |  2 +-
 packages/tko.provider.databind/src/index.js   |  1 +
 packages/tko.provider.multi/index.js          |  2 -
 packages/tko.provider.multi/package.json      |  2 +-
 packages/tko.provider.multi/src/index.js      |  2 +
 packages/tko.provider.mustache/package.json   |  2 +-
 .../tko.provider.mustache/{ => src}/index.js  |  6 +--
 packages/tko.provider.virtual/index.js        |  1 -
 packages/tko.provider.virtual/package.json    |  2 +-
 packages/tko.provider.virtual/src/index.js    |  1 +
 packages/tko.provider/index.js                |  2 -
 packages/tko.provider/package.json            |  2 +-
 packages/tko.provider/src/index.js            |  2 +
 packages/tko.utils.component/package.json     |  2 +-
 .../tko.utils.component/{ => src}/index.js    |  6 +--
 packages/tko.utils.parser/index.js            |  7 ---
 packages/tko.utils.parser/package.json        |  2 +-
 packages/tko.utils.parser/src/index.js        |  7 +++
 packages/tko.utils/index.js                   | 34 --------------
 packages/tko.utils/package.json               |  2 +-
 packages/tko.utils/src/index.js               | 34 ++++++++++++++
 58 files changed, 167 insertions(+), 167 deletions(-)
 delete mode 100644 packages/knockout/index.js
 rename index.js => packages/knockout/src/index.js (100%)
 delete mode 100644 packages/tko.bind/index.js
 create mode 100644 packages/tko.bind/src/index.js
 delete mode 100644 packages/tko.binding.component/index.js
 create mode 100644 packages/tko.binding.component/src/index.js
 delete mode 100644 packages/tko.binding.core/index.js
 create mode 100644 packages/tko.binding.core/src/index.js
 rename packages/tko.binding.foreach/{ => src}/index.js (70%)
 rename packages/tko.binding.if/{ => src}/index.js (91%)
 rename packages/tko.binding.template/{ => src}/index.js (54%)
 rename packages/tko.computed/{ => src}/index.js (79%)
 rename packages/tko.filter.punches/{ => src}/index.js (100%)
 delete mode 100644 packages/tko.lifecycle/index.js
 create mode 100644 packages/tko.lifecycle/src/index.js
 delete mode 100644 packages/tko.observable/index.js
 create mode 100644 packages/tko.observable/src/index.js
 delete mode 100644 packages/tko.provider.attr/index.js
 create mode 100644 packages/tko.provider.attr/src/index.js
 delete mode 100644 packages/tko.provider.bindingString/index.js
 create mode 100644 packages/tko.provider.bindingString/src/index.js
 delete mode 100644 packages/tko.provider.component/index.js
 create mode 100644 packages/tko.provider.component/src/index.js
 delete mode 100644 packages/tko.provider.databind/index.js
 create mode 100644 packages/tko.provider.databind/src/index.js
 delete mode 100644 packages/tko.provider.multi/index.js
 create mode 100644 packages/tko.provider.multi/src/index.js
 rename packages/tko.provider.mustache/{ => src}/index.js (53%)
 delete mode 100644 packages/tko.provider.virtual/index.js
 create mode 100644 packages/tko.provider.virtual/src/index.js
 delete mode 100644 packages/tko.provider/index.js
 create mode 100644 packages/tko.provider/src/index.js
 rename packages/tko.utils.component/{ => src}/index.js (82%)
 delete mode 100644 packages/tko.utils.parser/index.js
 create mode 100644 packages/tko.utils.parser/src/index.js
 delete mode 100644 packages/tko.utils/index.js
 create mode 100644 packages/tko.utils/src/index.js

diff --git a/packages/knockout/index.js b/packages/knockout/index.js
deleted file mode 100644
index e69de29b..00000000
diff --git a/index.js b/packages/knockout/src/index.js
similarity index 100%
rename from index.js
rename to packages/knockout/src/index.js
diff --git a/packages/tko.bind/index.js b/packages/tko.bind/index.js
deleted file mode 100644
index 22975937..00000000
--- a/packages/tko.bind/index.js
+++ /dev/null
@@ -1,6 +0,0 @@
-
-export * from './src/bindingContext';
-export * from './src/applyBindings';
-export * from './src/arrayToDomNodeChildren';
-
-export { BindingHandler, AsyncBindingHandler } from './src/BindingHandler';
diff --git a/packages/tko.bind/package.json b/packages/tko.bind/package.json
index b428eed0..8b899e9e 100644
--- a/packages/tko.bind/package.json
+++ b/packages/tko.bind/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "TKO DOM-Observable Binding",
   "main": "dist/tko.bind.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "dependencies": {
     "tko.computed": "knockout/tko.computed",
     "tko.lifecycle": "knockout/tko.lifecycle",
diff --git a/packages/tko.bind/src/index.js b/packages/tko.bind/src/index.js
new file mode 100644
index 00000000..a354f185
--- /dev/null
+++ b/packages/tko.bind/src/index.js
@@ -0,0 +1,6 @@
+
+export * from './bindingContext';
+export * from './applyBindings';
+export * from './arrayToDomNodeChildren';
+
+export { BindingHandler, AsyncBindingHandler } from './BindingHandler';
diff --git a/packages/tko.binding.component/index.js b/packages/tko.binding.component/index.js
deleted file mode 100644
index 0e26ec6f..00000000
--- a/packages/tko.binding.component/index.js
+++ /dev/null
@@ -1,3 +0,0 @@
-
-import component from './src/componentBinding'
-export var bindings = { component }
diff --git a/packages/tko.binding.component/package.json b/packages/tko.binding.component/package.json
index 66b83b1c..bc18612f 100644
--- a/packages/tko.binding.component/package.json
+++ b/packages/tko.binding.component/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "component: binding for web components",
   "main": "dist/tko.binding.component.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": { "frameworks": ["jasmine"]}
 }
diff --git a/packages/tko.binding.component/src/index.js b/packages/tko.binding.component/src/index.js
new file mode 100644
index 00000000..1c3c5b63
--- /dev/null
+++ b/packages/tko.binding.component/src/index.js
@@ -0,0 +1,3 @@
+
+import component from './componentBinding'
+export var bindings = { component }
diff --git a/packages/tko.binding.core/index.js b/packages/tko.binding.core/index.js
deleted file mode 100644
index f485a003..00000000
--- a/packages/tko.binding.core/index.js
+++ /dev/null
@@ -1,47 +0,0 @@
-
-import {attr} from './src/attr.js';
-import {checked, checkedValue} from './src/checked.js';
-import {click} from './src/click.js';
-import {css} from './src/css.js';
-import {enable, disable} from './src/enableDisable.js';
-import {eventHandler, onHandler} from './src/event.js';
-import {hasfocus} from './src/hasfocus.js';
-import {html} from './src/html.js';
-import $let from './src/let.js';
-import {options} from './src/options.js';
-import {selectedOptions} from './src/selectedOptions.js';
-import {style} from './src/style.js';
-import {submit} from './src/submit.js';
-import {text} from './src/text.js';
-import {textInput} from './src/textInput.js';
-import {uniqueName} from './src/uniqueName.js';
-import {value} from './src/value.js';
-import {visible, hidden} from './src/visible.js';
-import {using} from './src/using.js';
-
-export var bindings = {
-    attr: attr,
-    checked: checked,
-    checkedValue: checkedValue,
-    click: click,
-    css: css, 'class': css,
-    enable: enable,
-    'event': eventHandler,
-    disable: disable,
-    hasfocus: hasfocus, hasFocus: hasfocus,
-    hidden: hidden,
-    html: html,
-    'let': $let,
-    on: onHandler,
-    options: options,
-    selectedOptions: selectedOptions,
-    style: style,
-    submit: submit,
-    text: text,
-    textInput: textInput,
-    textinput: textInput,
-    uniqueName: uniqueName,
-    using: using,
-    value: value,
-    visible: visible
-};
\ No newline at end of file
diff --git a/packages/tko.binding.core/package.json b/packages/tko.binding.core/package.json
index 499feab7..14f80665 100644
--- a/packages/tko.binding.core/package.json
+++ b/packages/tko.binding.core/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO Core bindings",
   "main": "dist/tko.binding.core.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.binding.core/src/index.js b/packages/tko.binding.core/src/index.js
new file mode 100644
index 00000000..a05567fc
--- /dev/null
+++ b/packages/tko.binding.core/src/index.js
@@ -0,0 +1,47 @@
+
+import {attr} from './attr.js';
+import {checked, checkedValue} from './checked.js';
+import {click} from './click.js';
+import {css} from './css.js';
+import {enable, disable} from './enableDisable.js';
+import {eventHandler, onHandler} from './event.js';
+import {hasfocus} from './hasfocus.js';
+import {html} from './html.js';
+import $let from './let.js';
+import {options} from './options.js';
+import {selectedOptions} from './selectedOptions.js';
+import {style} from './style.js';
+import {submit} from './submit.js';
+import {text} from './text.js';
+import {textInput} from './textInput.js';
+import {uniqueName} from './uniqueName.js';
+import {value} from './value.js';
+import {visible, hidden} from './visible.js';
+import {using} from './using.js';
+
+export var bindings = {
+    attr: attr,
+    checked: checked,
+    checkedValue: checkedValue,
+    click: click,
+    css: css, 'class': css,
+    enable: enable,
+    'event': eventHandler,
+    disable: disable,
+    hasfocus: hasfocus, hasFocus: hasfocus,
+    hidden: hidden,
+    html: html,
+    'let': $let,
+    on: onHandler,
+    options: options,
+    selectedOptions: selectedOptions,
+    style: style,
+    submit: submit,
+    text: text,
+    textInput: textInput,
+    textinput: textInput,
+    uniqueName: uniqueName,
+    using: using,
+    value: value,
+    visible: visible
+};
\ No newline at end of file
diff --git a/packages/tko.binding.foreach/package.json b/packages/tko.binding.foreach/package.json
index 83f2ba65..e38409e5 100644
--- a/packages/tko.binding.foreach/package.json
+++ b/packages/tko.binding.foreach/package.json
@@ -3,7 +3,7 @@
   "version": "4.0.0-alpha2",
   "description": "Knockout Foreach Binding",
   "main": "dist/tko.binding.foreach.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "scripts": {
     "test": "gulp test --once"
   },
diff --git a/packages/tko.binding.foreach/index.js b/packages/tko.binding.foreach/src/index.js
similarity index 70%
rename from packages/tko.binding.foreach/index.js
rename to packages/tko.binding.foreach/src/index.js
index ac6fc738..962bd373 100644
--- a/packages/tko.binding.foreach/index.js
+++ b/packages/tko.binding.foreach/src/index.js
@@ -1,4 +1,4 @@
-import { ForEachBinding } from './src/foreach.js'
+import { ForEachBinding } from './foreach.js'
 
 export var bindings = {
   foreach: ForEachBinding
diff --git a/packages/tko.binding.if/package.json b/packages/tko.binding.if/package.json
index b8390ebe..09d17f39 100644
--- a/packages/tko.binding.if/package.json
+++ b/packages/tko.binding.if/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO conditional (if/ifnot/unless/with/else) bindings",
   "main": "dist/tko.binding.if.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.binding.if/index.js b/packages/tko.binding.if/src/index.js
similarity index 91%
rename from packages/tko.binding.if/index.js
rename to packages/tko.binding.if/src/index.js
index 01586fec..514329f0 100644
--- a/packages/tko.binding.if/index.js
+++ b/packages/tko.binding.if/src/index.js
@@ -4,7 +4,7 @@ import {
   ElseBindingHandler,
   UnlessBindingHandler,
   WithBindingHandler
-} from './src/ifIfnotWith'
+} from './ifIfnotWith'
 
 export const bindings = {
   'if': IfBindingHandler,
diff --git a/packages/tko.binding.template/package.json b/packages/tko.binding.template/package.json
index bd59a380..d1631cbd 100644
--- a/packages/tko.binding.template/package.json
+++ b/packages/tko.binding.template/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO Template bindings",
   "main": "dist/tko.binding.template.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.binding.template/index.js b/packages/tko.binding.template/src/index.js
similarity index 54%
rename from packages/tko.binding.template/index.js
rename to packages/tko.binding.template/src/index.js
index c7cbca6b..9979a37d 100644
--- a/packages/tko.binding.template/index.js
+++ b/packages/tko.binding.template/src/index.js
@@ -1,11 +1,11 @@
 
 import {
   TemplateForEachBindingHandler
-} from './src/foreach'
+} from './foreach'
 
 import {
   TemplateBindingHandler
-} from './src/templating'
+} from './templating'
 //    'let': letBinding,
 //    template: template,
 
@@ -14,7 +14,7 @@ export const bindings = {
   template: TemplateBindingHandler
 }
 
-export * from './src/nativeTemplateEngine'
-export * from './src/templateEngine'
-export * from './src/templating'
-export * from './src/templateSources'
+export * from './nativeTemplateEngine'
+export * from './templateEngine'
+export * from './templating'
+export * from './templateSources'
diff --git a/packages/tko.computed/package.json b/packages/tko.computed/package.json
index d5fbdbf9..ce3b1bd3 100644
--- a/packages/tko.computed/package.json
+++ b/packages/tko.computed/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "TKO Computed Observables",
   "main": "dist/tko.computed.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "dependencies": {
     "tko.utils": "knockout/tko.utils",
     "tko.observable": "knockout/tko.observable"
diff --git a/packages/tko.computed/index.js b/packages/tko.computed/src/index.js
similarity index 79%
rename from packages/tko.computed/index.js
rename to packages/tko.computed/src/index.js
index 1f83ffc7..057f188b 100644
--- a/packages/tko.computed/index.js
+++ b/packages/tko.computed/src/index.js
@@ -10,9 +10,9 @@ export {
     isComputed,
     isPureComputed,
     pureComputed
-} from './src/computed.js';
+} from './computed.js';
 
 
 export {
     throttleExtender
-} from './src/throttleExtender';
+} from './throttleExtender';
diff --git a/packages/tko.filter.punches/package.json b/packages/tko.filter.punches/package.json
index 547c1a5f..63abd7ea 100644
--- a/packages/tko.filter.punches/package.json
+++ b/packages/tko.filter.punches/package.json
@@ -3,7 +3,7 @@
   "version": "0.2.0",
   "description": "TKO filters from knockout punches",
   "main": "dist/tko.filter.punches.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.filter.punches/index.js b/packages/tko.filter.punches/src/index.js
similarity index 100%
rename from packages/tko.filter.punches/index.js
rename to packages/tko.filter.punches/src/index.js
diff --git a/packages/tko.lifecycle/index.js b/packages/tko.lifecycle/index.js
deleted file mode 100644
index 584fdd6b..00000000
--- a/packages/tko.lifecycle/index.js
+++ /dev/null
@@ -1,3 +0,0 @@
-
-
-export {default as LifeCycle} from './src/LifeCycle'
\ No newline at end of file
diff --git a/packages/tko.lifecycle/package.json b/packages/tko.lifecycle/package.json
index 3816ef1a..be6df508 100644
--- a/packages/tko.lifecycle/package.json
+++ b/packages/tko.lifecycle/package.json
@@ -13,7 +13,7 @@
   "version": "1.0.0",
   "description": "Knockout LifeCycle for object instances",
   "main": "dist/tko.lifecycle.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "repository": "git@github.com:knockout/tko.lifecycle.git",
   "author": "Knockout Team",
   "license": "MIT",
diff --git a/packages/tko.lifecycle/src/index.js b/packages/tko.lifecycle/src/index.js
new file mode 100644
index 00000000..80e2d392
--- /dev/null
+++ b/packages/tko.lifecycle/src/index.js
@@ -0,0 +1,3 @@
+
+
+export {default as LifeCycle} from './LifeCycle'
\ No newline at end of file
diff --git a/packages/tko.observable/index.js b/packages/tko.observable/index.js
deleted file mode 100644
index 5a3923fa..00000000
--- a/packages/tko.observable/index.js
+++ /dev/null
@@ -1,21 +0,0 @@
-//
-// Observables.
-// ---
-//
-// The following are added to the root `[t]ko` object.
-//
-
-export {
-    observable, isObservable, unwrap, peek,
-    isWriteableObservable, isWritableObservable
-} from './src/observable';
-export { isSubscribable, subscribable } from './src/subscribable';
-export { observableArray } from './src/observableArray';
-export { trackArrayChanges, arrayChangeEventName } from './src/observableArray.changeTracking';
-export { toJS, toJSON } from './src/mappingHelpers';
-export { deferUpdates } from './src/defer.js';
-
-export { valuesArePrimitiveAndEqual, applyExtenders, extenders } from './src/extenders';
-import * as dependencyDetection from './src/dependencyDetection';
-
-export { dependencyDetection };
diff --git a/packages/tko.observable/package.json b/packages/tko.observable/package.json
index b00cb788..96ba2424 100644
--- a/packages/tko.observable/package.json
+++ b/packages/tko.observable/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "TKO subscribables and observables",
   "main": "dist/tko.observable.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
diff --git a/packages/tko.observable/src/index.js b/packages/tko.observable/src/index.js
new file mode 100644
index 00000000..5587db03
--- /dev/null
+++ b/packages/tko.observable/src/index.js
@@ -0,0 +1,21 @@
+//
+// Observables.
+// ---
+//
+// The following are added to the root `[t]ko` object.
+//
+
+export {
+    observable, isObservable, unwrap, peek,
+    isWriteableObservable, isWritableObservable
+} from './observable';
+export { isSubscribable, subscribable } from './subscribable';
+export { observableArray } from './observableArray';
+export { trackArrayChanges, arrayChangeEventName } from './observableArray.changeTracking';
+export { toJS, toJSON } from './mappingHelpers';
+export { deferUpdates } from './defer.js';
+
+export { valuesArePrimitiveAndEqual, applyExtenders, extenders } from './extenders';
+import * as dependencyDetection from './dependencyDetection';
+
+export { dependencyDetection };
diff --git a/packages/tko.provider.attr/index.js b/packages/tko.provider.attr/index.js
deleted file mode 100644
index 9ba568f7..00000000
--- a/packages/tko.provider.attr/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export {default as AttributeProvider} from './src/AttributeProvider.js'
diff --git a/packages/tko.provider.attr/package.json b/packages/tko.provider.attr/package.json
index c6309186..40a87417 100644
--- a/packages/tko.provider.attr/package.json
+++ b/packages/tko.provider.attr/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Link HTML attributes (e.g. ko-handler-name) to binding handlers",
   "main": "dist/tko.provider.attr.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": {"frameworks":["mocha","chai"]}
 }
diff --git a/packages/tko.provider.attr/src/index.js b/packages/tko.provider.attr/src/index.js
new file mode 100644
index 00000000..03b2da68
--- /dev/null
+++ b/packages/tko.provider.attr/src/index.js
@@ -0,0 +1 @@
+export {default as AttributeProvider} from './AttributeProvider.js'
diff --git a/packages/tko.provider.bindingString/index.js b/packages/tko.provider.bindingString/index.js
deleted file mode 100644
index 2f1f5b41..00000000
--- a/packages/tko.provider.bindingString/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export {default as BindingStringProvider} from './src/BindingStringProvider'
diff --git a/packages/tko.provider.bindingString/package.json b/packages/tko.provider.bindingString/package.json
index cf618f59..a268fa97 100644
--- a/packages/tko.provider.bindingString/package.json
+++ b/packages/tko.provider.bindingString/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Abstract Base Class for providers that parse a binding string",
   "main": "dist/tko.provider.bindingString.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.bindingString/src/index.js b/packages/tko.provider.bindingString/src/index.js
new file mode 100644
index 00000000..00137b14
--- /dev/null
+++ b/packages/tko.provider.bindingString/src/index.js
@@ -0,0 +1 @@
+export {default as BindingStringProvider} from './BindingStringProvider'
diff --git a/packages/tko.provider.component/index.js b/packages/tko.provider.component/index.js
deleted file mode 100644
index 5860a579..00000000
--- a/packages/tko.provider.component/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export {default as ComponentProvider} from './src/ComponentProvider'
diff --git a/packages/tko.provider.component/package.json b/packages/tko.provider.component/package.json
index 5a660dcf..1fed4ad1 100644
--- a/packages/tko.provider.component/package.json
+++ b/packages/tko.provider.component/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Bind custom web components e.g. <custom-binding>",
   "main": "dist/tko.provider.component.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": {"frameworks": ["jasmine"]}
 }
diff --git a/packages/tko.provider.component/src/index.js b/packages/tko.provider.component/src/index.js
new file mode 100644
index 00000000..3fc96f12
--- /dev/null
+++ b/packages/tko.provider.component/src/index.js
@@ -0,0 +1 @@
+export {default as ComponentProvider} from './ComponentProvider'
diff --git a/packages/tko.provider.databind/index.js b/packages/tko.provider.databind/index.js
deleted file mode 100644
index f8845310..00000000
--- a/packages/tko.provider.databind/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export {default as DataBindProvider} from './src/DataBindProvider'
diff --git a/packages/tko.provider.databind/package.json b/packages/tko.provider.databind/package.json
index e9b1f382..bac99e9d 100644
--- a/packages/tko.provider.databind/package.json
+++ b/packages/tko.provider.databind/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Link HTML attributes based on a `data-bind` HTML attribute",
   "main": "dist/tko.provider.databind.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.provider.databind/src/index.js b/packages/tko.provider.databind/src/index.js
new file mode 100644
index 00000000..04143d3f
--- /dev/null
+++ b/packages/tko.provider.databind/src/index.js
@@ -0,0 +1 @@
+export {default as DataBindProvider} from './DataBindProvider'
diff --git a/packages/tko.provider.multi/index.js b/packages/tko.provider.multi/index.js
deleted file mode 100644
index cf226573..00000000
--- a/packages/tko.provider.multi/index.js
+++ /dev/null
@@ -1,2 +0,0 @@
-
-export {default as MultiProvider} from './src/MultiProvider'
diff --git a/packages/tko.provider.multi/package.json b/packages/tko.provider.multi/package.json
index 9747a9c7..0725074a 100644
--- a/packages/tko.provider.multi/package.json
+++ b/packages/tko.provider.multi/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Combine multiple other providers into one",
   "main": "dist/tko.provider.multi.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma":{"frameworks":["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.multi/src/index.js b/packages/tko.provider.multi/src/index.js
new file mode 100644
index 00000000..cd98cdb9
--- /dev/null
+++ b/packages/tko.provider.multi/src/index.js
@@ -0,0 +1,2 @@
+
+export {default as MultiProvider} from './MultiProvider'
diff --git a/packages/tko.provider.mustache/package.json b/packages/tko.provider.mustache/package.json
index 986efb28..5170f1f3 100644
--- a/packages/tko.provider.mustache/package.json
+++ b/packages/tko.provider.mustache/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "Interpolate text/node attributes {{ }}",
   "main": "dist/tko.preprocessor.mustache.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.provider.mustache/index.js b/packages/tko.provider.mustache/src/index.js
similarity index 53%
rename from packages/tko.provider.mustache/index.js
rename to packages/tko.provider.mustache/src/index.js
index a5068962..ba91f152 100644
--- a/packages/tko.provider.mustache/index.js
+++ b/packages/tko.provider.mustache/src/index.js
@@ -1,12 +1,12 @@
 
 export {
   default as AttributeMustacheProvider
-} from './src/AttributeMustacheProvider'
+} from './AttributeMustacheProvider'
 
 export {
   default as TextMustacheProvider
-} from './src/TextMustacheProvider'
+} from './TextMustacheProvider'
 
 export {
   parseInterpolation
-} from './src/mustacheParser'
+} from './mustacheParser'
diff --git a/packages/tko.provider.virtual/index.js b/packages/tko.provider.virtual/index.js
deleted file mode 100644
index 80b65a55..00000000
--- a/packages/tko.provider.virtual/index.js
+++ /dev/null
@@ -1 +0,0 @@
-export {default as VirtualProvider} from './src/VirtualProvider'
diff --git a/packages/tko.provider.virtual/package.json b/packages/tko.provider.virtual/package.json
index 0dbe6d83..f446db70 100644
--- a/packages/tko.provider.virtual/package.json
+++ b/packages/tko.provider.virtual/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Binding provider for <!-- ko handler: ... --> virtual elements",
   "main": "dist/tko.provider.virtual.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "author": "Knockout Team",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "chai"]}
diff --git a/packages/tko.provider.virtual/src/index.js b/packages/tko.provider.virtual/src/index.js
new file mode 100644
index 00000000..4291a027
--- /dev/null
+++ b/packages/tko.provider.virtual/src/index.js
@@ -0,0 +1 @@
+export {default as VirtualProvider} from './VirtualProvider'
diff --git a/packages/tko.provider/index.js b/packages/tko.provider/index.js
deleted file mode 100644
index b7038d31..00000000
--- a/packages/tko.provider/index.js
+++ /dev/null
@@ -1,2 +0,0 @@
-
-export { default as Provider } from './src/Provider'
diff --git a/packages/tko.provider/package.json b/packages/tko.provider/package.json
index b4ac34e8..11f585c5 100644
--- a/packages/tko.provider/package.json
+++ b/packages/tko.provider/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Abstract base class of tko Provider (HTML <-> Data Binding linker)",
   "main": "dist/tko.provider.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "author": "Knockout Team",
   "license": "MIT",
   "karma" : { "frameworks": ["mocha", "chai"] }
diff --git a/packages/tko.provider/src/index.js b/packages/tko.provider/src/index.js
new file mode 100644
index 00000000..8bfbeeed
--- /dev/null
+++ b/packages/tko.provider/src/index.js
@@ -0,0 +1,2 @@
+
+export { default as Provider } from './Provider'
diff --git a/packages/tko.utils.component/package.json b/packages/tko.utils.component/package.json
index 5c8e2fb6..1060fd27 100644
--- a/packages/tko.utils.component/package.json
+++ b/packages/tko.utils.component/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Registry and loading utilities for web components",
   "main": "dist/tko.utils.component.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": {"frameworks":["jasmine"]}
 }
diff --git a/packages/tko.utils.component/index.js b/packages/tko.utils.component/src/index.js
similarity index 82%
rename from packages/tko.utils.component/index.js
rename to packages/tko.utils.component/src/index.js
index 8bd747ff..14ca3b23 100644
--- a/packages/tko.utils.component/index.js
+++ b/packages/tko.utils.component/src/index.js
@@ -1,7 +1,7 @@
 
-import {registry} from './src/registry'
+import {registry} from './registry'
 
-import { ComponentABC } from './src/ComponentABC'
+import { ComponentABC } from './ComponentABC'
 
 
 import {
@@ -10,7 +10,7 @@ import {
   unregister,
   defaultLoader,
   defaultConfigRegistry
-} from './src/loaders'
+} from './loaders'
 
 export default {
   ComponentABC,
diff --git a/packages/tko.utils.parser/index.js b/packages/tko.utils.parser/index.js
deleted file mode 100644
index 8022c84a..00000000
--- a/packages/tko.utils.parser/index.js
+++ /dev/null
@@ -1,7 +0,0 @@
-
-export {default as Parser} from './src/Parser'
-export {default as Identifier} from './src/Identifier'
-export {default as Arguments} from './src/Arguments'
-export {default as Node} from './src/Node'
-
-export {default as parseObjectLiteral} from './src/preparse'
diff --git a/packages/tko.utils.parser/package.json b/packages/tko.utils.parser/package.json
index 24f12e6f..9e4dbb1e 100644
--- a/packages/tko.utils.parser/package.json
+++ b/packages/tko.utils.parser/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "description": "Parse the Javascript-like language used in data-bind and other HTML attributes (CSP-safe)",
   "main": "dist/tko.utils.parser.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "license": "MIT",
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.utils.parser/src/index.js b/packages/tko.utils.parser/src/index.js
new file mode 100644
index 00000000..91bda022
--- /dev/null
+++ b/packages/tko.utils.parser/src/index.js
@@ -0,0 +1,7 @@
+
+export {default as Parser} from './Parser'
+export {default as Identifier} from './Identifier'
+export {default as Arguments} from './Arguments'
+export {default as Node} from './Node'
+
+export {default as parseObjectLiteral} from './preparse'
diff --git a/packages/tko.utils/index.js b/packages/tko.utils/index.js
deleted file mode 100644
index ef306611..00000000
--- a/packages/tko.utils/index.js
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
-  tko.util
-  ===
-
-
-*/
-
-export * from './src/array.js';
-export * from './src/async.js';
-export * from './src/error.js';
-export * from './src/ie.js';
-export * from './src/object.js';
-export * from './src/proto.js';
-export * from './src/string.js';
-export * from './src/symbol.js';
-export * from './src/css.js';
-export { jQuerySetInstance } from './src/jquery.js';
-export { default as options } from './src/options.js';
-
-// DOM;
-export * from './src/dom/event.js';
-export * from './src/dom/info.js';
-export * from './src/dom/manipulation.js';
-export * from './src/dom/fixes.js';
-export * from './src/dom/html.js';
-export * from './src/dom/disposal.js';
-
-// Sub-Modules;
-import * as memoization from './src/memoization';
-import * as tasks from './src/tasks.js';
-import * as virtualElements from './src/dom/virtualElements.js';
-import * as domData from './src/dom/data.js';
-
-export {tasks, virtualElements, domData, memoization};
diff --git a/packages/tko.utils/package.json b/packages/tko.utils/package.json
index 42f9797a..b33f4acf 100644
--- a/packages/tko.utils/package.json
+++ b/packages/tko.utils/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "description": "TKO Utilities",
   "main": "dist/tko.utils.js",
-  "module": "index.js",
+  "module": "src/index.js",
   "files": [
     "dist/",
     "src/",
diff --git a/packages/tko.utils/src/index.js b/packages/tko.utils/src/index.js
new file mode 100644
index 00000000..5ff1abba
--- /dev/null
+++ b/packages/tko.utils/src/index.js
@@ -0,0 +1,34 @@
+/*
+  tko.util
+  ===
+
+
+*/
+
+export * from './array.js';
+export * from './async.js';
+export * from './error.js';
+export * from './ie.js';
+export * from './object.js';
+export * from './proto.js';
+export * from './string.js';
+export * from './symbol.js';
+export * from './css.js';
+export { jQuerySetInstance } from './jquery.js';
+export { default as options } from './options.js';
+
+// DOM;
+export * from './dom/event.js';
+export * from './dom/info.js';
+export * from './dom/manipulation.js';
+export * from './dom/fixes.js';
+export * from './dom/html.js';
+export * from './dom/disposal.js';
+
+// Sub-Modules;
+import * as memoization from './memoization';
+import * as tasks from './tasks.js';
+import * as virtualElements from './dom/virtualElements.js';
+import * as domData from './dom/data.js';
+
+export {tasks, virtualElements, domData, memoization};

From 9e41ba53a536a79ab3e321eef236ef6fedfdb0dd Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 18:10:53 -0500
Subject: [PATCH 03/20] Add standard eslint config

---
 .eslintrc                        |  6 +++++
 package.json                     |  2 ++
 packages/tko.lifecycle/.eslintrc | 40 --------------------------------
 3 files changed, 8 insertions(+), 40 deletions(-)
 create mode 100644 .eslintrc
 delete mode 100644 packages/tko.lifecycle/.eslintrc

diff --git a/.eslintrc b/.eslintrc
new file mode 100644
index 00000000..fe3f7b2d
--- /dev/null
+++ b/.eslintrc
@@ -0,0 +1,6 @@
+{
+  "extends": "standard",
+  "parserOptions": {
+    "sourceType": "module"
+  }
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 7793c2b5..dfff2f19 100644
--- a/package.json
+++ b/package.json
@@ -47,6 +47,8 @@
     "chai": "^4.1.0",
     "colors": "^1.1.2",
     "electron": "^1.6.11",
+    "eslint": "^4.9.0",
+    "eslint-config-standard": "^10.2.1",
     "gulp": "^3.9.1",
     "gulp-rename": "^1.2.2",
     "gulp-replace": "^0.6.1",
diff --git a/packages/tko.lifecycle/.eslintrc b/packages/tko.lifecycle/.eslintrc
deleted file mode 100644
index 391821a7..00000000
--- a/packages/tko.lifecycle/.eslintrc
+++ /dev/null
@@ -1,40 +0,0 @@
-extends: 'eslint:recommended'
-
-ecmaFeatures:
-  modules: true
-  # Note: https://github.com/eslint/eslint/issues/4787
-  sourceType: module
-
-parserOptions:
-    sourceType: module
-
-rules:
-  indent:
-    - 2
-    - 2
-  quotes: 0
-  linebreak-style:
-    - 2
-    - unix
-  semi: 0
-  strict: 0
-  dot-notation: 0
-  no-underscore-dangle: 0
-  eol-last: 0
-  curly: 0
-  camelcase: 0
-
-env:
-  browser: true
-  es6: true
-
-globals:
-  assert: true
-  describe: true
-  it: true
-  iit: true
-  ddescribe: true
-  afterEach: true
-  beforeEach: true
-  expect: true
-  testNode: true
\ No newline at end of file

From 2080de8f8d043a4694ed6b07e58f3d7d9b199efa Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 18:11:30 -0500
Subject: [PATCH 04/20] Add *-error.log to .gitignore (ignore yarn-error.log)

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 2edc168e..330c9904 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,6 +24,7 @@ work/
 yarn.lock
 
 *-debug.log
+*-error.log
 
 # Rollup Visualizer
 visual.html

From 0c1dacb3b412d59f7a47595a6850e156ba94a173 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 18:17:26 -0500
Subject: [PATCH 05/20] Don't commit dist files to repo

---
 .gitignore                                    |    2 +-
 dist/ko.js                                    |    3 -
 dist/ko.js.map                                |    3 -
 dist/ko.min.js                                |    3 -
 dist/ko.min.js.map                            |    3 -
 .../dist/knockout-fast-foreach.js             |  477 ---
 .../dist/knockout-fast-foreach.min.js         |    7 -
 .../tko.binding.if/dist/tko.binding.if.js     | 2679 -------------
 .../dist/tko.binding.template.js              | 3463 -----------------
 packages/tko.utils/dist/tko.utils.js          | 1459 -------
 10 files changed, 1 insertion(+), 8098 deletions(-)
 delete mode 100644 dist/ko.js
 delete mode 100644 dist/ko.js.map
 delete mode 100644 dist/ko.min.js
 delete mode 100644 dist/ko.min.js.map
 delete mode 100644 packages/tko.binding.foreach/dist/knockout-fast-foreach.js
 delete mode 100644 packages/tko.binding.foreach/dist/knockout-fast-foreach.min.js
 delete mode 100644 packages/tko.binding.if/dist/tko.binding.if.js
 delete mode 100644 packages/tko.binding.template/dist/tko.binding.template.js
 delete mode 100644 packages/tko.utils/dist/tko.utils.js

diff --git a/.gitignore b/.gitignore
index 330c9904..a9a32993 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,7 +19,7 @@ node_modules
 # Knockout built files
 _repo
 coverage/
-work/
+dist/
 
 yarn.lock
 
diff --git a/dist/ko.js b/dist/ko.js
deleted file mode 100644
index c4b7f834..00000000
--- a/dist/ko.js
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6e49760d4cebb8f102f606fb8d1759a8620bd315e5fee2aeaae4debf1ba9d31c
-size 328360
diff --git a/dist/ko.js.map b/dist/ko.js.map
deleted file mode 100644
index a580fd39..00000000
--- a/dist/ko.js.map
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:97c141ef5bdc072cb4679303d00b6895bcf7827806835bb6b895ba01d42f70be
-size 581943
diff --git a/dist/ko.min.js b/dist/ko.min.js
deleted file mode 100644
index 704e8a0f..00000000
--- a/dist/ko.min.js
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:dfc23c9f789d776c36863d9b5305fc7fff7da13b28deb6336583280aa5d374ab
-size 170030
diff --git a/dist/ko.min.js.map b/dist/ko.min.js.map
deleted file mode 100644
index 951fd310..00000000
--- a/dist/ko.min.js.map
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:12c5cc6e491c9e1b0dd332b59f0dac91caf9d3ff2d926324ffa2411fbad3e25f
-size 542337
diff --git a/packages/tko.binding.foreach/dist/knockout-fast-foreach.js b/packages/tko.binding.foreach/dist/knockout-fast-foreach.js
deleted file mode 100644
index d47d2323..00000000
--- a/packages/tko.binding.foreach/dist/knockout-fast-foreach.js
+++ /dev/null
@@ -1,477 +0,0 @@
-/*!
-  Knockout Fast Foreach v0.6.0 (2016-07-28T11:02:54.197Z)
-  By: Brian M Hunt (C) 2015 | License: MIT
-
-  Adds `fastForEach` to `ko.bindingHandlers`.
-*/
-(function (root, factory) {
-  if (typeof define === 'function' && define.amd) {
-    define(['knockout'], factory);
-  } else if (typeof exports === 'object') {
-    module.exports = factory(require('knockout'));
-  } else {
-    root.KnockoutFastForeach = factory(root.ko);
-  }
-}(this, function (ko) {
-  "use strict";
-// index.js
-// --------
-// Fast For Each
-//
-// Employing sound techniques to make a faster Knockout foreach binding.
-// --------
-
-//      Utilities
-var MAX_LIST_SIZE = 9007199254740991;
-
-// from https://github.com/jonschlinkert/is-plain-object
-function isPlainObject(o) {
-  return !!o && typeof o === 'object' && o.constructor === Object;
-}
-
-// From knockout/src/virtualElements.js
-var commentNodesHaveTextProperty = document && document.createComment("test").text === "<!--test-->";
-var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
-var supportsDocumentFragment = document && typeof document.createDocumentFragment === "function";
-function isVirtualNode(node) {
-  return (node.nodeType === 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-}
-
-
-// Get a copy of the (possibly virtual) child nodes of the given element,
-// put them into a container, then empty the given node.
-function makeTemplateNode(sourceNode) {
-  var container = document.createElement("div");
-  var parentNode;
-  if (sourceNode.content) {
-    // For e.g. <template> tags
-    parentNode = sourceNode.content;
-  } else if (sourceNode.tagName === 'SCRIPT') {
-    parentNode = document.createElement("div");
-    parentNode.innerHTML = sourceNode.text;
-  } else {
-    // Anything else e.g. <div>
-    parentNode = sourceNode;
-  }
-  ko.utils.arrayForEach(ko.virtualElements.childNodes(parentNode), function (child) {
-    // FIXME - This cloneNode could be expensive; we may prefer to iterate over the
-    // parentNode children in reverse (so as not to foul the indexes as childNodes are
-    // removed from parentNode when inserted into the container)
-    if (child) {
-      container.insertBefore(child.cloneNode(true), null);
-    }
-  });
-  return container;
-}
-
-// Mimic a KO change item 'add'
-function valueToChangeAddItem(value, index) {
-  return {
-    status: 'added',
-    value: value,
-    index: index
-  };
-}
-
-// KO 3.4 doesn't seem to export this utility function so it's here just to be sure
-function createSymbolOrString(identifier) {
-  return typeof Symbol === 'function' ? Symbol(identifier) : identifier;
-}
-
-// store a symbol for caching the pending delete info index in the data item objects
-var PENDING_DELETE_INDEX_KEY = createSymbolOrString("_ko_ffe_pending_delete_index");
-
-function FastForEach(spec) {
-  this.element = spec.element;
-  this.container = isVirtualNode(this.element) ?
-                   this.element.parentNode : this.element;
-  this.$context = spec.$context;
-  this.data = spec.data;
-  this.as = spec.as;
-  this.noContext = spec.noContext;
-  this.noIndex = spec.noIndex;
-  this.afterAdd = spec.afterAdd;
-  this.beforeRemove = spec.beforeRemove;
-  this.templateNode = makeTemplateNode(
-    spec.templateNode || (spec.name ? document.getElementById(spec.name).cloneNode(true) : spec.element)
-  );
-  this.afterQueueFlush = spec.afterQueueFlush;
-  this.beforeQueueFlush = spec.beforeQueueFlush;
-  this.changeQueue = [];
-  this.firstLastNodesList = [];
-  this.indexesToDelete = [];
-  this.rendering_queued = false;
-  this.pendingDeletes = [];
-
-  // Remove existing content.
-  ko.virtualElements.emptyNode(this.element);
-
-  // Prime content
-  var primeData = ko.unwrap(this.data);
-  if (primeData.map) {
-    this.onArrayChange(primeData.map(valueToChangeAddItem), true);
-  }
-
-  // Watch for changes
-  if (ko.isObservable(this.data)) {
-    if (!this.data.indexOf) {
-      // Make sure the observable is trackable.
-      this.data = this.data.extend({ trackArrayChanges: true });
-    }
-    this.changeSubs = this.data.subscribe(this.onArrayChange, this, 'arrayChange');
-  }
-}
-
-FastForEach.PENDING_DELETE_INDEX_KEY = PENDING_DELETE_INDEX_KEY;
-
-FastForEach.animateFrame = window.requestAnimationFrame || window.webkitRequestAnimationFrame ||
-  window.mozRequestAnimationFrame || window.msRequestAnimationFrame ||
-  function (cb) { return window.setTimeout(cb, 1000 / 60); };
-
-
-FastForEach.prototype.dispose = function () {
-  if (this.changeSubs) {
-    this.changeSubs.dispose();
-  }
-  this.flushPendingDeletes();
-};
-
-
-// If the array changes we register the change.
-FastForEach.prototype.onArrayChange = function (changeSet, isInitial) {
-  var self = this;
-  var changeMap = {
-    added: [],
-    deleted: []
-  };
-
-  // knockout array change notification index handling:
-  // - sends the original array indexes for deletes
-  // - sends the new array indexes for adds
-  // - sorts them all by index in ascending order
-  // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked
-  for (var i = 0, len = changeSet.length; i < len; i++) {
-
-    if (changeMap.added.length && changeSet[i].status == 'added') {
-      var lastAdd = changeMap.added[changeMap.added.length - 1];
-      var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;
-      if (lastIndex + 1 == changeSet[i].index) {
-        if (!lastAdd.isBatch) {
-          // transform the last addition into a batch addition object
-          lastAdd = {
-            isBatch: true,
-            status: 'added',
-            index: lastAdd.index,
-            values: [lastAdd.value]
-          };
-          changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);
-        }
-        lastAdd.values.push(changeSet[i].value);
-        continue;
-      }
-    }
-
-    changeMap[changeSet[i].status].push(changeSet[i]);
-  }
-
-  if (changeMap.deleted.length > 0) {
-    this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);
-    this.changeQueue.push({ status: 'clearDeletedIndexes' });
-  }
-  this.changeQueue.push.apply(this.changeQueue, changeMap.added);
-  // Once a change is registered, the ticking count-down starts for the processQueue.
-  if (this.changeQueue.length > 0 && !this.rendering_queued) {
-    this.rendering_queued = true;
-    if (isInitial) {
-      self.processQueue();
-    } else {
-      FastForEach.animateFrame.call(window, function () { self.processQueue(); });
-    }
-  }
-};
-
-
-// Reflect all the changes in the queue in the DOM, then wipe the queue.
-FastForEach.prototype.processQueue = function () {
-  var self = this;
-  var lowestIndexChanged = MAX_LIST_SIZE;
-
-  // Callback so folks can do things before the queue flush.
-  if (typeof this.beforeQueueFlush === 'function') {
-    this.beforeQueueFlush(this.changeQueue);
-  }
-
-  ko.utils.arrayForEach(this.changeQueue, function (changeItem) {
-    if (typeof changeItem.index === 'number') {
-      lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);
-    }
-    // console.log(self.data(), "CI", JSON.stringify(changeItem, null, 2), JSON.stringify($(self.element).text()))
-    self[changeItem.status](changeItem);
-    // console.log("  ==> ", JSON.stringify($(self.element).text()))
-  });
-  this.flushPendingDeletes();
-  this.rendering_queued = false;
-
-  // Update our indexes.
-  if (!this.noIndex) {
-    this.updateIndexes(lowestIndexChanged);
-  }
-
-  // Callback so folks can do things.
-  if (typeof this.afterQueueFlush === 'function') {
-    this.afterQueueFlush(this.changeQueue);
-  }
-  this.changeQueue = [];
-};
-
-
-function extendWithIndex(context) {
-  context.$index = ko.observable();
-};
-
-
-// Process a changeItem with {status: 'added', ...}
-FastForEach.prototype.added = function (changeItem) {
-  var index = changeItem.index;
-  var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];
-  var referenceElement = this.getLastNodeBeforeIndex(index);
-  // gather all childnodes for a possible batch insertion
-  var allChildNodes = [];
-
-  for (var i = 0, len = valuesToAdd.length; i < len; ++i) {
-    var childNodes;
-
-    // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset
-    var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);
-    if (pendingDelete && pendingDelete.nodesets.length) {
-      childNodes = pendingDelete.nodesets.pop();
-    } else {
-      var templateClone = this.templateNode.cloneNode(true);
-      var childContext;
-
-      if (this.noContext) {
-        childContext = this.$context.extend({
-          $item: valuesToAdd[i],
-          $index: this.noIndex ? undefined : ko.observable()
-        });
-      } else {
-        childContext = this.$context.createChildContext(valuesToAdd[i], this.as || null, this.noIndex ? undefined : extendWithIndex);
-      }
-
-      // apply bindings first, and then process child nodes, because bindings can add childnodes
-      ko.applyBindingsToDescendants(childContext, templateClone);
-
-      childNodes = ko.virtualElements.childNodes(templateClone);
-    }
-
-    // Note discussion at https://github.com/angular/angular.js/issues/7851
-    allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(childNodes));
-    this.firstLastNodesList.splice(index + i, 0, { first: childNodes[0], last: childNodes[childNodes.length - 1] });
-  }
-
-  if (typeof this.afterAdd === 'function') {
-    this.afterAdd({
-      nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),
-      foreachInstance: this
-    }
-    );
-  } else {
-    this.insertAllAfter(allChildNodes, referenceElement);
-  }
-};
-
-FastForEach.prototype.getNodesForIndex = function (index) {
-  var result = [],
-    ptr = this.firstLastNodesList[index].first,
-    last = this.firstLastNodesList[index].last;
-  result.push(ptr);
-  while (ptr && ptr !== last) {
-    ptr = ptr.nextSibling;
-    result.push(ptr);
-  }
-  return result;
-};
-
-FastForEach.prototype.getLastNodeBeforeIndex = function (index) {
-  if (index < 1 || index - 1 >= this.firstLastNodesList.length)
-    return null;
-  return this.firstLastNodesList[index - 1].last;
-};
-
-FastForEach.prototype.insertAllAfter = function (nodeOrNodeArrayToInsert, insertAfterNode) {
-  var frag, len, i,
-    containerNode = this.element;
-
-  // poor man's node and array check, should be enough for this
-  if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {
-    throw new Error("Expected a single node or a node array");
-  }
-  if (nodeOrNodeArrayToInsert.nodeType !== undefined) {
-    ko.virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);
-    return [nodeOrNodeArrayToInsert];
-  } else if (nodeOrNodeArrayToInsert.length === 1) {
-    ko.virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);
-  } else if (supportsDocumentFragment) {
-    frag = document.createDocumentFragment();
-
-    for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {
-      frag.appendChild(nodeOrNodeArrayToInsert[i]);
-    }
-    ko.virtualElements.insertAfter(containerNode, frag, insertAfterNode);
-  } else {
-    // Nodes are inserted in reverse order - pushed down immediately after
-    // the last node for the previous item or as the first node of element.
-    for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {
-      var child = nodeOrNodeArrayToInsert[i];
-      if (!child) { break; }
-      ko.virtualElements.insertAfter(containerNode, child, insertAfterNode);
-    }
-  }
-  return nodeOrNodeArrayToInsert;
-};
-
-// checks if the deleted data item should be handled with delay for a possible reuse at additions
-FastForEach.prototype.shouldDelayDeletion = function (data) {
-  return data && (typeof data === "object" || typeof data === "function");
-};
-
-// gets the pending deletion info for this data item
-FastForEach.prototype.getPendingDeleteFor = function (data) {
-  var index = data && data[PENDING_DELETE_INDEX_KEY];
-  if (index === undefined) return null;
-  return this.pendingDeletes[index];
-};
-
-// tries to find the existing pending delete info for this data item, and if it can't, it registeres one
-FastForEach.prototype.getOrCreatePendingDeleteFor = function (data) {
-  var pd = this.getPendingDeleteFor(data);
-  if (pd) {
-    return pd;
-  }
-  pd = {
-    data: data,
-    nodesets: []
-  };
-  data[PENDING_DELETE_INDEX_KEY] = this.pendingDeletes.length;
-  this.pendingDeletes.push(pd);
-  return pd;
-};
-
-// Process a changeItem with {status: 'deleted', ...}
-FastForEach.prototype.deleted = function (changeItem) {
-  // if we should delay the deletion of this data, we add the nodeset to the pending delete info object
-  if (this.shouldDelayDeletion(changeItem.value)) {
-    var pd = this.getOrCreatePendingDeleteFor(changeItem.value);
-    pd.nodesets.push(this.getNodesForIndex(changeItem.index));
-  } else { // simple data, just remove the nodes
-    this.removeNodes(this.getNodesForIndex(changeItem.index));
-  }
-  this.indexesToDelete.push(changeItem.index);
-};
-
-// removes a set of nodes from the DOM
-FastForEach.prototype.removeNodes = function (nodes) {
-  if (!nodes.length) { return; }
-
-  var removeFn = function () {
-    var parent = nodes[0].parentNode;
-    for (var i = nodes.length - 1; i >= 0; --i) {
-      ko.cleanNode(nodes[i]);
-      parent.removeChild(nodes[i]);
-    }
-  };
-
-  if (this.beforeRemove) {
-    var beforeRemoveReturn = this.beforeRemove({
-      nodesToRemove: nodes, foreachInstance: this
-    }) || {};
-    // If beforeRemove returns a `then`–able e.g. a Promise, we remove
-    // the nodes when that thenable completes.  We pass any errors to
-    // ko.onError.
-    if (typeof beforeRemoveReturn.then === 'function') {
-      beforeRemoveReturn.then(removeFn, ko.onError ? ko.onError : undefined);
-    }
-  } else {
-    removeFn();
-  }
-};
-
-// flushes the pending delete info store
-// this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up
-// we also call it on dispose not to leave any mess
-FastForEach.prototype.flushPendingDeletes = function () {
-  for (var i = 0, len = this.pendingDeletes.length; i != len; ++i) {
-    var pd = this.pendingDeletes[i];
-    while (pd.nodesets.length) {
-      this.removeNodes(pd.nodesets.pop());
-    }
-    if (pd.data && pd.data[PENDING_DELETE_INDEX_KEY] !== undefined)
-      delete pd.data[PENDING_DELETE_INDEX_KEY];
-  }
-  this.pendingDeletes = [];
-};
-
-// We batch our deletion of item indexes in our parallel array.
-// See brianmhunt/knockout-fast-foreach#6/#8
-FastForEach.prototype.clearDeletedIndexes = function () {
-  // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine
-  // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.
-  for (var i = this.indexesToDelete.length - 1; i >= 0; --i) {
-    this.firstLastNodesList.splice(this.indexesToDelete[i], 1);
-  }
-  this.indexesToDelete = [];
-};
-
-
-FastForEach.prototype.getContextStartingFrom = function (node) {
-  var ctx;
-  while (node) {
-    ctx = ko.contextFor(node);
-    if (ctx) { return ctx; }
-    node = node.nextSibling;
-  }
-};
-
-
-FastForEach.prototype.updateIndexes = function (fromIndex) {
-  var ctx;
-  for (var i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {
-    ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);
-    if (ctx) { ctx.$index(i); }
-  }
-};
-
-
-ko.bindingHandlers.fastForEach = {
-  // Valid valueAccessors:
-  //    []
-  //    ko.observable([])
-  //    ko.observableArray([])
-  //    ko.computed
-  //    {data: array, name: string, as: string}
-  init: function init(element, valueAccessor, bindings, vm, context) {
-    var ffe, value = valueAccessor();
-    if (isPlainObject(value)) {
-      value.element = value.element || element;
-      value.$context = context;
-      ffe = new FastForEach(value);
-    } else {
-      ffe = new FastForEach({
-        element: element,
-        data: ko.unwrap(context.$rawData) === value ? context.$rawData : value,
-        $context: context
-      });
-    }
-
-    ko.utils.domNodeDisposal.addDisposeCallback(element, function () {
-      ffe.dispose();
-    });
-    return { controlsDescendantBindings: true };
-  },
-
-  // Export for testing, debugging, and overloading.
-  FastForEach: FastForEach
-};
-
-ko.virtualElements.allowedBindings.fastForEach = true;
-}));
diff --git a/packages/tko.binding.foreach/dist/knockout-fast-foreach.min.js b/packages/tko.binding.foreach/dist/knockout-fast-foreach.min.js
deleted file mode 100644
index d87f904b..00000000
--- a/packages/tko.binding.foreach/dist/knockout-fast-foreach.min.js
+++ /dev/null
@@ -1,7 +0,0 @@
-/*!
-  Knockout Fast Foreach v0.6.0 (2016-07-28T11:02:54.197Z)
-  By: Brian M Hunt (C) 2015 | License: MIT
-
-  Adds `fastForEach` to `ko.bindingHandlers`.
-*/
-!function(e,t){"function"==typeof define&&define.amd?define(["knockout"],t):"object"==typeof exports?module.exports=t(require("knockout")):e.KnockoutFastForeach=t(e.ko)}(this,function(e){"use strict";function t(e){return!!e&&"object"==typeof e&&e.constructor===Object}function n(e){return 8===e.nodeType&&h.test(u?e.text:e.nodeValue)}function s(t){var n,s=document.createElement("div");return t.content?n=t.content:"SCRIPT"===t.tagName?(n=document.createElement("div"),n.innerHTML=t.text):n=t,e.utils.arrayForEach(e.virtualElements.childNodes(n),function(e){e&&s.insertBefore(e.cloneNode(!0),null)}),s}function i(e,t){return{status:"added",value:e,index:t}}function o(e){return"function"==typeof Symbol?Symbol(e):e}function r(t){this.element=t.element,this.container=n(this.element)?this.element.parentNode:this.element,this.$context=t.$context,this.data=t.data,this.as=t.as,this.noContext=t.noContext,this.noIndex=t.noIndex,this.afterAdd=t.afterAdd,this.beforeRemove=t.beforeRemove,this.templateNode=s(t.templateNode||(t.name?document.getElementById(t.name).cloneNode(!0):t.element)),this.afterQueueFlush=t.afterQueueFlush,this.beforeQueueFlush=t.beforeQueueFlush,this.changeQueue=[],this.firstLastNodesList=[],this.indexesToDelete=[],this.rendering_queued=!1,this.pendingDeletes=[],e.virtualElements.emptyNode(this.element);var o=e.unwrap(this.data);o.map&&this.onArrayChange(o.map(i),!0),e.isObservable(this.data)&&(this.data.indexOf||(this.data=this.data.extend({trackArrayChanges:!0})),this.changeSubs=this.data.subscribe(this.onArrayChange,this,"arrayChange"))}function a(t){t.$index=e.observable()}var d=9007199254740991,u=document&&"<!--test-->"===document.createComment("test").text,h=u?/^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/:/^\s*ko(?:\s+([\s\S]+))?\s*$/,l=document&&"function"==typeof document.createDocumentFragment,c=o("_ko_ffe_pending_delete_index");r.PENDING_DELETE_INDEX_KEY=c,r.animateFrame=window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||window.msRequestAnimationFrame||function(e){return window.setTimeout(e,1e3/60)},r.prototype.dispose=function(){this.changeSubs&&this.changeSubs.dispose(),this.flushPendingDeletes()},r.prototype.onArrayChange=function(e,t){for(var n=this,s={added:[],deleted:[]},i=0,o=e.length;i<o;i++){if(s.added.length&&"added"==e[i].status){var a=s.added[s.added.length-1],d=a.isBatch?a.index+a.values.length-1:a.index;if(d+1==e[i].index){a.isBatch||(a={isBatch:!0,status:"added",index:a.index,values:[a.value]},s.added.splice(s.added.length-1,1,a)),a.values.push(e[i].value);continue}}s[e[i].status].push(e[i])}s.deleted.length>0&&(this.changeQueue.push.apply(this.changeQueue,s.deleted),this.changeQueue.push({status:"clearDeletedIndexes"})),this.changeQueue.push.apply(this.changeQueue,s.added),this.changeQueue.length>0&&!this.rendering_queued&&(this.rendering_queued=!0,t?n.processQueue():r.animateFrame.call(window,function(){n.processQueue()}))},r.prototype.processQueue=function(){var t=this,n=d;"function"==typeof this.beforeQueueFlush&&this.beforeQueueFlush(this.changeQueue),e.utils.arrayForEach(this.changeQueue,function(e){"number"==typeof e.index&&(n=Math.min(n,e.index)),t[e.status](e)}),this.flushPendingDeletes(),this.rendering_queued=!1,this.noIndex||this.updateIndexes(n),"function"==typeof this.afterQueueFlush&&this.afterQueueFlush(this.changeQueue),this.changeQueue=[]},r.prototype.added=function(t){for(var n=t.index,s=t.isBatch?t.values:[t.value],i=this.getLastNodeBeforeIndex(n),o=[],r=0,d=s.length;r<d;++r){var u,h=this.getPendingDeleteFor(s[r]);if(h&&h.nodesets.length)u=h.nodesets.pop();else{var l,c=this.templateNode.cloneNode(!0);l=this.noContext?this.$context.extend({$item:s[r],$index:this.noIndex?void 0:e.observable()}):this.$context.createChildContext(s[r],this.as||null,this.noIndex?void 0:a),e.applyBindingsToDescendants(l,c),u=e.virtualElements.childNodes(c)}o.push.apply(o,Array.prototype.slice.call(u)),this.firstLastNodesList.splice(n+r,0,{first:u[0],last:u[u.length-1]})}"function"==typeof this.afterAdd?this.afterAdd({nodeOrArrayInserted:this.insertAllAfter(o,i),foreachInstance:this}):this.insertAllAfter(o,i)},r.prototype.getNodesForIndex=function(e){var t=[],n=this.firstLastNodesList[e].first,s=this.firstLastNodesList[e].last;for(t.push(n);n&&n!==s;)n=n.nextSibling,t.push(n);return t},r.prototype.getLastNodeBeforeIndex=function(e){return e<1||e-1>=this.firstLastNodesList.length?null:this.firstLastNodesList[e-1].last},r.prototype.insertAllAfter=function(t,n){var s,i,o,r=this.element;if(void 0===t.nodeType&&void 0===t.length)throw new Error("Expected a single node or a node array");if(void 0!==t.nodeType)return e.virtualElements.insertAfter(r,t,n),[t];if(1===t.length)e.virtualElements.insertAfter(r,t[0],n);else if(l){for(s=document.createDocumentFragment(),o=0,i=t.length;o!==i;++o)s.appendChild(t[o]);e.virtualElements.insertAfter(r,s,n)}else for(o=t.length-1;o>=0;--o){var a=t[o];if(!a)break;e.virtualElements.insertAfter(r,a,n)}return t},r.prototype.shouldDelayDeletion=function(e){return e&&("object"==typeof e||"function"==typeof e)},r.prototype.getPendingDeleteFor=function(e){var t=e&&e[c];return void 0===t?null:this.pendingDeletes[t]},r.prototype.getOrCreatePendingDeleteFor=function(e){var t=this.getPendingDeleteFor(e);return t?t:(t={data:e,nodesets:[]},e[c]=this.pendingDeletes.length,this.pendingDeletes.push(t),t)},r.prototype.deleted=function(e){if(this.shouldDelayDeletion(e.value)){var t=this.getOrCreatePendingDeleteFor(e.value);t.nodesets.push(this.getNodesForIndex(e.index))}else this.removeNodes(this.getNodesForIndex(e.index));this.indexesToDelete.push(e.index)},r.prototype.removeNodes=function(t){if(t.length){var n=function(){for(var n=t[0].parentNode,s=t.length-1;s>=0;--s)e.cleanNode(t[s]),n.removeChild(t[s])};if(this.beforeRemove){var s=this.beforeRemove({nodesToRemove:t,foreachInstance:this})||{};"function"==typeof s.then&&s.then(n,e.onError?e.onError:void 0)}else n()}},r.prototype.flushPendingDeletes=function(){for(var e=0,t=this.pendingDeletes.length;e!=t;++e){for(var n=this.pendingDeletes[e];n.nodesets.length;)this.removeNodes(n.nodesets.pop());n.data&&void 0!==n.data[c]&&delete n.data[c]}this.pendingDeletes=[]},r.prototype.clearDeletedIndexes=function(){for(var e=this.indexesToDelete.length-1;e>=0;--e)this.firstLastNodesList.splice(this.indexesToDelete[e],1);this.indexesToDelete=[]},r.prototype.getContextStartingFrom=function(t){for(var n;t;){if(n=e.contextFor(t))return n;t=t.nextSibling}},r.prototype.updateIndexes=function(e){for(var t,n=e,s=this.firstLastNodesList.length;n<s;++n)t=this.getContextStartingFrom(this.firstLastNodesList[n].first),t&&t.$index(n)},e.bindingHandlers.fastForEach={init:function(n,s,i,o,a){var d,u=s();return t(u)?(u.element=u.element||n,u.$context=a,d=new r(u)):d=new r({element:n,data:e.unwrap(a.$rawData)===u?a.$rawData:u,$context:a}),e.utils.domNodeDisposal.addDisposeCallback(n,function(){d.dispose()}),{controlsDescendantBindings:!0}},FastForEach:r},e.virtualElements.allowedBindings.fastForEach=!0});
\ No newline at end of file
diff --git a/packages/tko.binding.if/dist/tko.binding.if.js b/packages/tko.binding.if/dist/tko.binding.if.js
deleted file mode 100644
index fd681f85..00000000
--- a/packages/tko.binding.if/dist/tko.binding.if.js
+++ /dev/null
@@ -1,2679 +0,0 @@
-(function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-  typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  (factory((global.tko = global.tko || {}, global.tko.binding = global.tko.binding || {}, global.tko.binding.if = global.tko.binding.if || {})));
-}(this, function (exports) { 'use strict';
-
-  //
-  // Array utilities
-  //
-  /* eslint no-cond-assign: 0 */
-
-  function arrayForEach(array, action) {
-      for (var i = 0, j = array.length; i < j; i++)
-          action(array[i], i);
-  }
-
-  function arrayIndexOf(array, item) {
-      // IE9
-      if (typeof Array.prototype.indexOf == "function")
-          return Array.prototype.indexOf.call(array, item);
-      for (var i = 0, j = array.length; i < j; i++)
-          if (array[i] === item)
-              return i;
-      return -1;
-  }
-
-  function arrayFirst(array, predicate, predicateOwner) {
-      for (var i = 0, j = array.length; i < j; i++)
-          if (predicate.call(predicateOwner, array[i], i))
-              return array[i];
-      return null;
-  }
-
-  function arrayRemoveItem(array, itemToRemove) {
-      var index = arrayIndexOf(array, itemToRemove);
-      if (index > 0) {
-          array.splice(index, 1);
-      }
-      else if (index === 0) {
-          array.shift();
-      }
-  }
-
-  function arrayPushAll(array, valuesToPush) {
-      if (valuesToPush instanceof Array)
-          array.push.apply(array, valuesToPush);
-      else
-          for (var i = 0, j = valuesToPush.length; i < j; i++)
-              array.push(valuesToPush[i]);
-      return array;
-  }
-
-  // Go through the items that have been added and deleted and try to find matches between them.
-  function findMovesInArrayComparison(left, right, limitFailedCompares) {
-      if (left.length && right.length) {
-          var failedCompares, l, r, leftItem, rightItem;
-          for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
-              for (r = 0; rightItem = right[r]; ++r) {
-                  if (leftItem['value'] === rightItem['value']) {
-                      leftItem['moved'] = rightItem['index'];
-                      rightItem['moved'] = leftItem['index'];
-                      right.splice(r, 1);         // This item is marked as moved; so remove it from right list
-                      failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures
-                      break;
-                  }
-              }
-              failedCompares += r;
-          }
-      }
-  }
-
-
-
-  var statusNotInOld = 'added';
-  var statusNotInNew = 'deleted';
-  // Simple calculation based on Levenshtein distance.
-  function compareArrays(oldArray, newArray, options) {
-      // For backward compatibility, if the third arg is actually a bool, interpret
-      // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
-      options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
-      oldArray = oldArray || [];
-      newArray = newArray || [];
-
-      if (oldArray.length < newArray.length)
-          return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
-      else
-          return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
-  }
-
-
-  function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
-      var myMin = Math.min,
-          myMax = Math.max,
-          editDistanceMatrix = [],
-          smlIndex, smlIndexMax = smlArray.length,
-          bigIndex, bigIndexMax = bigArray.length,
-          compareRange = (bigIndexMax - smlIndexMax) || 1,
-          maxDistance = smlIndexMax + bigIndexMax + 1,
-          thisRow, lastRow,
-          bigIndexMaxForRow, bigIndexMinForRow;
-
-      for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
-          lastRow = thisRow;
-          editDistanceMatrix.push(thisRow = []);
-          bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
-          bigIndexMinForRow = myMax(0, smlIndex - 1);
-          for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
-              if (!bigIndex)
-                  thisRow[bigIndex] = smlIndex + 1;
-              else if (!smlIndex)  // Top row - transform empty array into new array via additions
-                  thisRow[bigIndex] = bigIndex + 1;
-              else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
-                  thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
-              else {
-                  var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
-                  var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
-                  thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
-              }
-          }
-      }
-
-      var editScript = [], meMinusOne, notInSml = [], notInBig = [];
-      for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
-          meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
-          if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
-              notInSml.push(editScript[editScript.length] = {     // added
-                  'status': statusNotInSml,
-                  'value': bigArray[--bigIndex],
-                  'index': bigIndex });
-          } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
-              notInBig.push(editScript[editScript.length] = {     // deleted
-                  'status': statusNotInBig,
-                  'value': smlArray[--smlIndex],
-                  'index': smlIndex });
-          } else {
-              --bigIndex;
-              --smlIndex;
-              if (!options['sparse']) {
-                  editScript.push({
-                      'status': "retained",
-                      'value': bigArray[bigIndex] });
-              }
-          }
-      }
-
-      // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
-      // smlIndexMax keeps the time complexity of this algorithm linear.
-      findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
-
-      return editScript.reverse();
-  }
-
-  //
-  // This becomes ko.options
-  // --
-  //
-  // This is the root 'options', which must be extended by others.
-
-  var options = {
-      deferUpdates: false,
-
-      useOnlyNativeEvents: false,
-
-      protoProperty: '__ko_proto__',
-
-      // Modify the default attribute from `data-bind`.
-      defaultBindingAttribute: 'data-bind',
-
-      // Enable/disable <!-- ko binding: ... -> style bindings
-      allowVirtualElements: true,
-
-      // Global variables that can be accessed from bindings.
-      bindingGlobals: window,
-
-      // An instance of the binding provider.
-      bindingProviderInstance: null,
-
-      // jQuery will be automatically set to window.jQuery in applyBindings
-      // if it is (strictly equal to) undefined.  Set it to false or null to
-      // disable automatically setting jQuery.
-      jQuery: window && window.jQuery,
-
-      taskScheduler: null,
-
-      debug: false,
-
-      // Filters for bindings
-      //   data-bind="expression | filter_1 | filter_2"
-      filters: {},
-
-      onError: function (e) { throw e; },
-
-      set: function (name, value) {
-          options[name] = value;
-      }
-  };
-
-  Object.defineProperty(options, '$', {
-      get: function () { return options.jQuery; }
-  });
-
-  function catchFunctionErrors(delegate) {
-      return options.onError ? function () {
-          try {
-              return delegate.apply(this, arguments);
-          } catch (e) {
-              options.onError(e);
-          }
-      } : delegate;
-  }
-
-  function deferError(error) {
-      safeSetTimeout(function () { options.onError(error); }, 0);
-  }
-
-
-  function safeSetTimeout(handler, timeout) {
-      return setTimeout(catchFunctionErrors(handler), timeout);
-  }
-
-  function throttleFn(callback, timeout) {
-      var timeoutInstance;
-      return function () {
-          if (!timeoutInstance) {
-              timeoutInstance = safeSetTimeout(function () {
-                  timeoutInstance = undefined;
-                  callback();
-              }, timeout);
-          }
-      };
-  }
-
-  function debounceFn(callback, timeout) {
-      var timeoutInstance;
-      return function () {
-          clearTimeout(timeoutInstance);
-          timeoutInstance = safeSetTimeout(callback, timeout);
-      };
-  }
-
-  //
-  // Detection and Workarounds for Internet Explorer
-  //
-  /* eslint no-empty: 0 */
-
-  // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
-  // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
-  // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
-  // If there is a future need to detect specific versions of IE10+, we will amend this.
-  var ieVersion = document && (function() {
-      var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
-
-      // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
-      while (
-          div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
-          iElems[0]
-      ) {}
-      return version > 4 ? version : undefined;
-  }());
-
-  var isIe6 = ieVersion === 6;
-  var isIe7 = ieVersion === 7;
-
-  //
-  // Object functions
-  //
-
-  function extend(target, source) {
-      if (source) {
-          for(var prop in source) {
-              if(source.hasOwnProperty(prop)) {
-                  target[prop] = source[prop];
-              }
-          }
-      }
-      return target;
-  }
-
-  function objectForEach(obj, action) {
-      for (var prop in obj) {
-          if (obj.hasOwnProperty(prop)) {
-              action(prop, obj[prop]);
-          }
-      }
-  }
-
-
-  function objectMap(source, mapping) {
-      if (!source)
-          return source;
-      var target = {};
-      for (var prop in source) {
-          if (source.hasOwnProperty(prop)) {
-              target[prop] = mapping(source[prop], prop, source);
-          }
-      }
-      return target;
-  }
-
-  var protoProperty = options.protoProperty;
-
-  var canSetPrototype = ({ __proto__: [] } instanceof Array);
-
-  function setPrototypeOf(obj, proto) {
-      obj.__proto__ = proto;
-      return obj;
-  }
-
-  var setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;
-
-  function hasPrototype(instance, prototype) {
-      if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
-      if (instance[protoProperty] === prototype) return true;
-      return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
-  }
-
-  //
-  // ES6 Symbols
-  //
-
-  var useSymbols = typeof Symbol === 'function';
-
-  function createSymbolOrString(identifier) {
-      return useSymbols ? Symbol(identifier) : identifier;
-  }
-
-  //
-  // jQuery
-  //
-  // TODO: deprecate in favour of options.$
-
-  var jQueryInstance = window && window.jQuery;
-
-  function domNodeIsContainedBy (node, containedByNode) {
-      if (node === containedByNode)
-          return true;
-      if (node.nodeType === 11)
-          return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8
-      if (containedByNode.contains)
-          return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);
-      if (containedByNode.compareDocumentPosition)
-          return (containedByNode.compareDocumentPosition(node) & 16) == 16;
-      while (node && node != containedByNode) {
-          node = node.parentNode;
-      }
-      return !!node;
-  }
-
-  function domNodeIsAttachedToDocument (node) {
-      return domNodeIsContainedBy(node, node.ownerDocument.documentElement);
-  }
-
-  function anyDomNodeIsAttachedToDocument(nodes) {
-      return !!arrayFirst(nodes, domNodeIsAttachedToDocument);
-  }
-
-  function tagNameLower(element) {
-      // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
-      // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
-      // we don't need to do the .toLowerCase() as it will always be lower case anyway.
-      return element && element.tagName && element.tagName.toLowerCase();
-  }
-
-  //
-  // DOM node data
-  //
-  // import {createSymbolOrString} from '../symbol.js'
-
-  var uniqueId = 0;
-  var dataStoreKeyExpandoPropertyName = "__ko__data" + new Date();
-  var dataStore = {};
-
-
-  function getAll(node, createIfNotFound) {
-      var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-      var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
-      if (!hasExistingDataStore) {
-          if (!createIfNotFound)
-              return undefined;
-          dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
-          dataStore[dataStoreKey] = {};
-      }
-      return dataStore[dataStoreKey];
-  }
-
-  function get(node, key) {
-      var allDataForNode = getAll(node, false);
-      return allDataForNode === undefined ? undefined : allDataForNode[key];
-  }
-
-  function set(node, key, value) {
-      if (value === undefined) {
-          // Make sure we don't actually create a new domData key if we are actually deleting a value
-          if (getAll(node, false) === undefined)
-              return;
-      }
-      var allDataForNode = getAll(node, true);
-      allDataForNode[key] = value;
-  }
-
-  function clear(node) {
-      var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-      if (dataStoreKey) {
-          delete dataStore[dataStoreKey];
-          node[dataStoreKeyExpandoPropertyName] = null;
-          return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
-      }
-      return false;
-  }
-
-  function nextKey() {
-      return (uniqueId++) + dataStoreKeyExpandoPropertyName;
-  }
-
-  var domDataKey = nextKey();
-  // Node types:
-  // 1: Element
-  // 8: Comment
-  // 9: Document
-  var cleanableNodeTypes = { 1: true, 8: true, 9: true };
-  var cleanableNodeTypesWithDescendants = { 1: true, 9: true };
-
-  function getDisposeCallbacksCollection(node, createIfNotFound) {
-      var allDisposeCallbacks = get(node, domDataKey);
-      if ((allDisposeCallbacks === undefined) && createIfNotFound) {
-          allDisposeCallbacks = [];
-          set(node, domDataKey, allDisposeCallbacks);
-      }
-      return allDisposeCallbacks;
-  }
-  function destroyCallbacksCollection(node) {
-      set(node, domDataKey, undefined);
-  }
-
-  function cleanSingleNode(node) {
-      // Run all the dispose callbacks
-      var callbacks = getDisposeCallbacksCollection(node, false);
-      if (callbacks) {
-          callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
-          for (var i = 0; i < callbacks.length; i++)
-              callbacks[i](node);
-      }
-
-      // Erase the DOM data
-      clear(node);
-
-      // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)
-      for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {
-          otherNodeCleanerFunctions[i](node);
-      }
-
-      // Clear any immediate-child comment nodes, as these wouldn't have been found by
-      // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
-      if (cleanableNodeTypesWithDescendants[node.nodeType])
-          cleanImmediateCommentTypeChildren(node);
-  }
-
-  function cleanImmediateCommentTypeChildren(nodeWithChildren) {
-      var child, nextChild = nodeWithChildren.firstChild;
-      while (child = nextChild) {
-          nextChild = child.nextSibling;
-          if (child.nodeType === 8)
-              cleanSingleNode(child);
-      }
-  }
-
-  // Exports
-  function addDisposeCallback(node, callback) {
-      if (typeof callback != "function")
-          throw new Error("Callback must be a function");
-      getDisposeCallbacksCollection(node, true).push(callback);
-  }
-
-  function removeDisposeCallback(node, callback) {
-      var callbacksCollection = getDisposeCallbacksCollection(node, false);
-      if (callbacksCollection) {
-          arrayRemoveItem(callbacksCollection, callback);
-          if (callbacksCollection.length == 0)
-              destroyCallbacksCollection(node);
-      }
-  }
-
-  function cleanNode(node) {
-      // First clean this node, where applicable
-      if (cleanableNodeTypes[node.nodeType]) {
-          cleanSingleNode(node);
-
-          // ... then its descendants, where applicable
-          if (cleanableNodeTypesWithDescendants[node.nodeType]) {
-              // Clone the descendants list in case it changes during iteration
-              var descendants = [];
-              arrayPushAll(descendants, node.getElementsByTagName("*"));
-              for (var i = 0, j = descendants.length; i < j; i++)
-                  cleanSingleNode(descendants[i]);
-          }
-      }
-      return node;
-  }
-
-  function removeNode(node) {
-      cleanNode(node);
-      if (node.parentNode)
-          node.parentNode.removeChild(node);
-  }
-
-
-  // Expose supplemental node cleaning functions.
-  var otherNodeCleanerFunctions = [];
-
-
-  // Special support for jQuery here because it's so commonly used.
-  // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
-  // so notify it to tear down any resources associated with the node & descendants here.
-  function cleanjQueryData(node) {
-      var jQueryCleanNodeFn = jQueryInstance
-          ? jQueryInstance.cleanData : null;
-
-      if (jQueryCleanNodeFn) {
-          jQueryCleanNodeFn([node]);
-      }
-  }
-
-
-  otherNodeCleanerFunctions.push(cleanjQueryData);
-
-  var knownEvents = {};
-  var knownEventTypesByEventName = {};
-  var keyEventTypeName = (navigator && /Firefox\/2/i.test(navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';
-
-  knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
-
-  knownEvents['MouseEvents'] = [
-      'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',
-      'mouseout', 'mouseenter', 'mouseleave'];
-
-
-  objectForEach(knownEvents, function(eventType, knownEventsForType) {
-      if (knownEventsForType.length) {
-          for (var i = 0, j = knownEventsForType.length; i < j; i++)
-              knownEventTypesByEventName[knownEventsForType[i]] = eventType;
-      }
-  });
-
-  var commentNodesHaveTextProperty = document && document.createComment("test").text === "<!--test-->";
-
-  var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
-  var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
-  var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
-
-  function isStartComment(node) {
-      return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-  }
-
-  function isEndComment(node) {
-      return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-  }
-
-  function getVirtualChildren(startComment, allowUnbalanced) {
-      var currentNode = startComment;
-      var depth = 1;
-      var children = [];
-      while (currentNode = currentNode.nextSibling) {
-          if (isEndComment(currentNode)) {
-              depth--;
-              if (depth === 0)
-                  return children;
-          }
-
-          children.push(currentNode);
-
-          if (isStartComment(currentNode))
-              depth++;
-      }
-      if (!allowUnbalanced)
-          throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
-      return null;
-  }
-
-  function getMatchingEndComment(startComment, allowUnbalanced) {
-      var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
-      if (allVirtualChildren) {
-          if (allVirtualChildren.length > 0)
-              return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
-          return startComment.nextSibling;
-      } else
-          return null; // Must have no matching end comment, and allowUnbalanced is true
-  }
-
-  function getUnbalancedChildTags(node) {
-      // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
-      //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
-      var childNode = node.firstChild, captureRemaining = null;
-      if (childNode) {
-          do {
-              if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
-                  captureRemaining.push(childNode);
-              else if (isStartComment(childNode)) {
-                  var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
-                  if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
-                      childNode = matchingEndComment;
-                  else
-                      captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
-              } else if (isEndComment(childNode)) {
-                  captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
-              }
-          } while (childNode = childNode.nextSibling);
-      }
-      return captureRemaining;
-  }
-
-  var allowedBindings = {};
-  function childNodes(node) {
-      return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
-  }
-
-  function emptyNode(node) {
-      if (!isStartComment(node))
-          emptyDomNode(node);
-      else {
-          var virtualChildren = childNodes(node);
-          for (var i = 0, j = virtualChildren.length; i < j; i++)
-              removeNode(virtualChildren[i]);
-      }
-  }
-
-  function setDomNodeChildren(node, childNodes) {
-      if (!isStartComment(node))
-          setRegularDomNodeChildren(node, childNodes);
-      else {
-          emptyNode(node);
-          var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
-          for (var i = 0, j = childNodes.length; i < j; i++)
-              endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
-      }
-  }
-
-  function firstChild(node) {
-      if (!isStartComment(node)) {
-          return node.firstChild;
-      }
-      if (!node.nextSibling || isEndComment(node.nextSibling)) {
-          return null;
-      }
-      return node.nextSibling;
-  }
-
-
-  function nextSibling(node) {
-      if (isStartComment(node))
-          node = getMatchingEndComment(node);
-      if (node.nextSibling && isEndComment(node.nextSibling))
-          return null;
-      return node.nextSibling;
-  }
-
-  function previousSibling(node) {
-      var depth = 0;
-      do {
-          if (node.nodeType === 8) {
-              if (isStartComment(node)) {
-                  if (--depth === 0) {
-                      return node;
-                  }
-              } else if (isEndComment(node)) {
-                  depth++;
-              }
-          } else {
-              if (depth === 0) { return node; }
-          }
-      } while (node = node.previousSibling);
-      return;
-  }
-
-  function normaliseVirtualElementDomStructure(elementVerified) {
-      // Workaround for https://github.com/SteveSanderson/knockout/issues/155
-      // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
-      // that are direct descendants of <ul> into the preceding <li>)
-      if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])
-          return;
-
-      // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
-      // must be intended to appear *after* that child, so move them there.
-      var childNode = elementVerified.firstChild;
-      if (childNode) {
-          do {
-              if (childNode.nodeType === 1) {
-                  var unbalancedTags = getUnbalancedChildTags(childNode);
-                  if (unbalancedTags) {
-                      // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
-                      var nodeToInsertBefore = childNode.nextSibling;
-                      for (var i = 0; i < unbalancedTags.length; i++) {
-                          if (nodeToInsertBefore)
-                              elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
-                          else
-                              elementVerified.appendChild(unbalancedTags[i]);
-                      }
-                  }
-              }
-          } while (childNode = childNode.nextSibling);
-      }
-  }
-
-  function cloneNodes (nodesArray, shouldCleanNodes) {
-      for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
-          var clonedNode = nodesArray[i].cloneNode(true);
-          newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);
-      }
-      return newNodesArray;
-  }
-
-  function setRegularDomNodeChildren (domNode, childNodes) {
-      emptyDomNode(domNode);
-      if (childNodes) {
-          for (var i = 0, j = childNodes.length; i < j; i++)
-              domNode.appendChild(childNodes[i]);
-      }
-  }
-
-  function emptyDomNode (domNode) {
-      while (domNode.firstChild) {
-          removeNode(domNode.firstChild);
-      }
-  }
-
-  var supportsTemplateTag = 'content' in document.createElement('template');
-
-  var taskQueue = [];
-  var taskQueueLength = 0;
-  var nextHandle = 1;
-  var nextIndexToProcess = 0;
-  if (window.MutationObserver && !(window.navigator && window.navigator.standalone)) {
-      // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+
-      // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT
-      options.taskScheduler = (function (callback) {
-          var div = document.createElement("div");
-          new MutationObserver(callback).observe(div, {attributes: true});
-          return function () { div.classList.toggle("foo"); };
-      })(scheduledProcess);
-  } else if (document && "onreadystatechange" in document.createElement("script")) {
-      // IE 6-10
-      // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT
-      options.taskScheduler = function (callback) {
-          var script = document.createElement("script");
-          script.onreadystatechange = function () {
-              script.onreadystatechange = null;
-              document.documentElement.removeChild(script);
-              script = null;
-              callback();
-          };
-          document.documentElement.appendChild(script);
-      };
-  } else {
-      options.taskScheduler = function (callback) {
-          setTimeout(callback, 0);
-      };
-  }
-
-  function processTasks() {
-      if (taskQueueLength) {
-          // Each mark represents the end of a logical group of tasks and the number of these groups is
-          // limited to prevent unchecked recursion.
-          var mark = taskQueueLength, countMarks = 0;
-
-          // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue
-          for (var task; nextIndexToProcess < taskQueueLength; ) {
-              if (task = taskQueue[nextIndexToProcess++]) {
-                  if (nextIndexToProcess > mark) {
-                      if (++countMarks >= 5000) {
-                          nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion
-                          deferError(Error("'Too much recursion' after processing " + countMarks + " task groups."));
-                          break;
-                      }
-                      mark = taskQueueLength;
-                  }
-                  try {
-                      task();
-                  } catch (ex) {
-                      deferError(ex);
-                  }
-              }
-          }
-      }
-  }
-
-  function scheduledProcess() {
-      processTasks();
-
-      // Reset the queue
-      nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
-  }
-
-  function scheduleTaskProcessing() {
-      options.taskScheduler(scheduledProcess);
-  }
-
-
-  function schedule(func) {
-      if (!taskQueueLength) {
-          scheduleTaskProcessing();
-      }
-
-      taskQueue[taskQueueLength++] = func;
-      return nextHandle++;
-  }
-
-  function cancel(handle) {
-      var index = handle - (nextHandle - taskQueueLength);
-      if (index >= nextIndexToProcess && index < taskQueueLength) {
-          taskQueue[index] = null;
-      }
-  }
-
-  function deferUpdates(target) {
-      if (!target._deferUpdates) {
-          target._deferUpdates = true;
-          target.limit(function (callback) {
-              var handle;
-              return function () {
-                  cancel(handle);
-                  handle = schedule(callback);
-                  target.notifySubscribers(undefined, 'dirty');
-              };
-          });
-      }
-  }
-
-  var primitiveTypes = {
-      'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1
-  };
-
-
-  function valuesArePrimitiveAndEqual(a, b) {
-      var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
-      return oldValueIsPrimitive ? (a === b) : false;
-  }
-
-
-  function applyExtenders(requestedExtenders) {
-      var target = this;
-      if (requestedExtenders) {
-          objectForEach(requestedExtenders, function(key, value) {
-              var extenderHandler = extenders[key];
-              if (typeof extenderHandler == 'function') {
-                  target = extenderHandler(target, value) || target;
-              } else {
-                  options.onError(new Error("Extender not found: " + key));
-              }
-          });
-      }
-      return target;
-  }
-
-  /*
-                  --- DEFAULT EXTENDERS ---
-   */
-
-
-  // Change when notifications are published.
-  function notify(target, notifyWhen) {
-      target.equalityComparer = notifyWhen == "always" ?
-          null :  // null equalityComparer means to always notify
-          valuesArePrimitiveAndEqual;
-  }
-
-
-  function deferred(target, option) {
-      if (option !== true) {
-          throw new Error('The \'deferred\' extender only accepts the value \'true\', because it is not supported to turn deferral off once enabled.');
-      }
-      deferUpdates(target);
-  }
-
-
-  function rateLimit(target, options) {
-      var timeout, method, limitFunction;
-
-      if (typeof options == 'number') {
-          timeout = options;
-      } else {
-          timeout = options.timeout;
-          method = options.method;
-      }
-
-      // rateLimit supersedes deferred updates
-      target._deferUpdates = false;
-
-      limitFunction = method == 'notifyWhenChangesStop' ? debounceFn : throttleFn;
-
-      target.limit(function(callback) {
-          return limitFunction(callback, timeout);
-      });
-  }
-
-
-  var extenders = {
-      notify: notify,
-      deferred: deferred,
-      rateLimit: rateLimit
-  };
-
-  function subscription(target, callback, disposeCallback) {
-      this._target = target;
-      this.callback = callback;
-      this.disposeCallback = disposeCallback;
-      this.isDisposed = false;
-  }
-
-  subscription.prototype.dispose = function () {
-      this.isDisposed = true;
-      this.disposeCallback();
-  };
-
-  function subscribable() {
-      setPrototypeOfOrExtend(this, ko_subscribable_fn);
-      ko_subscribable_fn.init(this);
-  }
-
-  var defaultEvent = "change";
-
-
-  var ko_subscribable_fn = {
-      init: function(instance) {
-          instance._subscriptions = {};
-          instance._versionNumber = 1;
-      },
-
-      subscribe: function (callback, callbackTarget, event) {
-          var self = this;
-
-          event = event || defaultEvent;
-          var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
-
-          var subscriptionInstance = new subscription(self, boundCallback, function () {
-              arrayRemoveItem(self._subscriptions[event], subscriptionInstance);
-              if (self.afterSubscriptionRemove)
-                  self.afterSubscriptionRemove(event);
-          });
-
-          if (self.beforeSubscriptionAdd)
-              self.beforeSubscriptionAdd(event);
-
-          if (!self._subscriptions[event])
-              self._subscriptions[event] = [];
-          self._subscriptions[event].push(subscriptionInstance);
-
-          return subscriptionInstance;
-      },
-
-      notifySubscribers: function (valueToNotify, event) {
-          event = event || defaultEvent;
-          if (event === defaultEvent) {
-              this.updateVersion();
-          }
-          if (this.hasSubscriptionsForEvent(event)) {
-              try {
-                  begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)
-                  for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {
-                      // In case a subscription was disposed during the arrayForEach cycle, check
-                      // for isDisposed on each subscription before invoking its callback
-                      if (!subscriptionInstance.isDisposed)
-                          subscriptionInstance.callback(valueToNotify);
-                  }
-              } finally {
-                  end(); // End suppressing dependency detection
-              }
-          }
-      },
-
-      getVersion: function () {
-          return this._versionNumber;
-      },
-
-      hasChanged: function (versionToCheck) {
-          return this.getVersion() !== versionToCheck;
-      },
-
-      updateVersion: function () {
-          ++this._versionNumber;
-      },
-
-      hasSubscriptionsForEvent: function(event) {
-          return this._subscriptions[event] && this._subscriptions[event].length;
-      },
-
-      getSubscriptionsCount: function (event) {
-          if (event) {
-              return this._subscriptions[event] && this._subscriptions[event].length || 0;
-          } else {
-              var total = 0;
-              objectForEach(this._subscriptions, function(eventName, subscriptions) {
-                  if (eventName !== 'dirty')
-                      total += subscriptions.length;
-              });
-              return total;
-          }
-      },
-
-      isDifferent: function(oldValue, newValue) {
-          return !this.equalityComparer ||
-                 !this.equalityComparer(oldValue, newValue);
-      },
-
-      extend: applyExtenders
-  };
-
-
-  // For browsers that support proto assignment, we overwrite the prototype of each
-  // observable instance. Since observables are functions, we need Function.prototype
-  // to still be in the prototype chain.
-  if (canSetPrototype) {
-      setPrototypeOf(ko_subscribable_fn, Function.prototype);
-  }
-
-  subscribable.fn = ko_subscribable_fn;
-
-
-  function isSubscribable(instance) {
-      return instance != null && typeof instance.subscribe == "function" && typeof instance.notifySubscribers == "function";
-  }
-
-  var outerFrames = [];
-  var currentFrame;
-  var lastId = 0;
-  // Return a unique ID that can be assigned to an observable for dependency tracking.
-  // Theoretically, you could eventually overflow the number storage size, resulting
-  // in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53
-  // or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would
-  // take over 285 years to reach that number.
-  // Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html
-  function getId() {
-      return ++lastId;
-  }
-
-  function begin(options) {
-      outerFrames.push(currentFrame);
-      currentFrame = options;
-  }
-
-  function end() {
-      currentFrame = outerFrames.pop();
-  }
-
-
-  function registerDependency(subscribable) {
-      if (currentFrame) {
-          if (!isSubscribable(subscribable))
-              throw new Error("Only subscribable things can act as dependencies");
-          currentFrame.callback.call(currentFrame.callbackTarget, subscribable, subscribable._id || (subscribable._id = getId()));
-      }
-  }
-
-  function ignore(callback, callbackTarget, callbackArgs) {
-      try {
-          begin();
-          return callback.apply(callbackTarget, callbackArgs || []);
-      } finally {
-          end();
-      }
-  }
-
-  function getDependenciesCount() {
-      if (currentFrame)
-          return currentFrame.computed.getDependenciesCount();
-  }
-
-  var observableLatestValue = createSymbolOrString('_latestValue');
-
-
-  function observable(initialValue) {
-      function Observable() {
-          if (arguments.length > 0) {
-              // Write
-
-              // Ignore writes if the value hasn't changed
-              if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {
-                  Observable.valueWillMutate();
-                  Observable[observableLatestValue] = arguments[0];
-                  Observable.valueHasMutated();
-              }
-              return this; // Permits chained assignments
-          }
-          else {
-              // Read
-              registerDependency(Observable); // The caller only needs to be notified of changes if they did a "read" operation
-              return Observable[observableLatestValue];
-          }
-      }
-
-      Observable[observableLatestValue] = initialValue;
-
-      // Inherit from 'subscribable'
-      if (!canSetPrototype) {
-          // 'subscribable' won't be on the prototype chain unless we put it there directly
-          extend(Observable, subscribable.fn);
-      }
-      subscribable.fn.init(Observable);
-
-      // Inherit from 'observable'
-      setPrototypeOfOrExtend(Observable, observable.fn);
-
-      if (options.deferUpdates) {
-          deferUpdates(Observable);
-      }
-
-      return Observable;
-  }
-
-  // Define prototype for observables
-  observable.fn = {
-      equalityComparer: valuesArePrimitiveAndEqual,
-      peek: function() { return this[observableLatestValue]; },
-      valueHasMutated: function () { this.notifySubscribers(this[observableLatestValue]); },
-      valueWillMutate: function () {
-          this.notifySubscribers(this[observableLatestValue], 'beforeChange');
-      }
-  };
-
-
-
-  // Moved out of "limit" to avoid the extra closure
-  function limitNotifySubscribers(value, event) {
-      if (!event || event === defaultEvent) {
-          this._limitChange(value);
-      } else if (event === 'beforeChange') {
-          this._limitBeforeChange(value);
-      } else {
-          this._origNotifySubscribers(value, event);
-      }
-  }
-
-  // Add `limit` function to the subscribable prototype
-  subscribable.fn.limit = function limit(limitFunction) {
-      var self = this, selfIsObservable = isObservable(self),
-          ignoreBeforeChange, previousValue, pendingValue, beforeChange = 'beforeChange';
-
-      if (!self._origNotifySubscribers) {
-          self._origNotifySubscribers = self.notifySubscribers;
-          self.notifySubscribers = limitNotifySubscribers;
-      }
-
-      var finish = limitFunction(function() {
-          self._notificationIsPending = false;
-
-          // If an observable provided a reference to itself, access it to get the latest value.
-          // This allows computed observables to delay calculating their value until needed.
-          if (selfIsObservable && pendingValue === self) {
-              pendingValue = self();
-          }
-          ignoreBeforeChange = false;
-          if (self.isDifferent(previousValue, pendingValue)) {
-              self._origNotifySubscribers(previousValue = pendingValue);
-          }
-      });
-
-      self._limitChange = function(value) {
-          self._notificationIsPending = ignoreBeforeChange = true;
-          pendingValue = value;
-          finish();
-      };
-      self._limitBeforeChange = function(value) {
-          if (!ignoreBeforeChange) {
-              previousValue = value;
-              self._origNotifySubscribers(value, beforeChange);
-          }
-      };
-  };
-
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the observable constructor
-  if (canSetPrototype) {
-      setPrototypeOf(observable.fn, subscribable.fn);
-  }
-
-  var protoProperty$1 = observable.protoProperty = options.protoProperty;
-  observable.fn[protoProperty$1] = observable;
-
-  function isObservable(instance) {
-      return hasPrototype(instance, observable);
-  }
-
-  function unwrap(value) {
-      return isObservable(value) ? value() : value;
-  }
-
-  var arrayChangeEventName = 'arrayChange';
-
-
-  function trackArrayChanges(target, options) {
-      // Use the provided options--each call to trackArrayChanges overwrites the previously set options
-      target.compareArrayOptions = {};
-      if (options && typeof options == "object") {
-          extend(target.compareArrayOptions, options);
-      }
-      target.compareArrayOptions.sparse = true;
-
-      // Only modify the target observable once
-      if (target.cacheDiffForKnownOperation) {
-          return;
-      }
-      var trackingChanges = false,
-          cachedDiff = null,
-          arrayChangeSubscription,
-          pendingNotifications = 0,
-          underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,
-          underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;
-
-      // Watch "subscribe" calls, and for array change events, ensure change tracking is enabled
-      target.beforeSubscriptionAdd = function (event) {
-          if (underlyingBeforeSubscriptionAddFunction)
-              underlyingBeforeSubscriptionAddFunction.call(target, event);
-          if (event === arrayChangeEventName) {
-              trackChanges();
-          }
-      };
-
-      // Watch "dispose" calls, and for array change events, ensure change tracking is disabled when all are disposed
-      target.afterSubscriptionRemove = function (event) {
-          if (underlyingAfterSubscriptionRemoveFunction)
-              underlyingAfterSubscriptionRemoveFunction.call(target, event);
-          if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {
-              arrayChangeSubscription.dispose();
-              trackingChanges = false;
-          }
-      };
-
-      function trackChanges() {
-          // Calling 'trackChanges' multiple times is the same as calling it once
-          if (trackingChanges) {
-              return;
-          }
-
-          trackingChanges = true;
-
-          // Intercept "notifySubscribers" to track how many times it was called.
-          var underlyingNotifySubscribersFunction = target['notifySubscribers'];
-          target['notifySubscribers'] = function(valueToNotify, event) {
-              if (!event || event === defaultEvent) {
-                  ++pendingNotifications;
-              }
-              return underlyingNotifySubscribersFunction.apply(this, arguments);
-          };
-
-          // Each time the array changes value, capture a clone so that on the next
-          // change it's possible to produce a diff
-          var previousContents = [].concat(target.peek() || []);
-          cachedDiff = null;
-          arrayChangeSubscription = target.subscribe(function(currentContents) {
-              // Make a copy of the current contents and ensure it's an array
-              currentContents = [].concat(currentContents || []);
-
-              // Compute the diff and issue notifications, but only if someone is listening
-              if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {
-                  var changes = getChanges(previousContents, currentContents);
-              }
-
-              // Eliminate references to the old, removed items, so they can be GCed
-              previousContents = currentContents;
-              cachedDiff = null;
-              pendingNotifications = 0;
-
-              if (changes && changes.length) {
-                  target['notifySubscribers'](changes, arrayChangeEventName);
-              }
-          });
-      }
-
-      function getChanges(previousContents, currentContents) {
-          // We try to re-use cached diffs.
-          // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates
-          // plugin, which without this check would not be compatible with arrayChange notifications. Normally,
-          // notifications are issued immediately so we wouldn't be queueing up more than one.
-          if (!cachedDiff || pendingNotifications > 1) {
-              cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);
-          }
-
-          return cachedDiff;
-      }
-
-      target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {
-          var index, argsIndex;
-          // Only run if we're currently tracking changes for this observable array
-          // and there aren't any pending deferred notifications.
-          if (!trackingChanges || pendingNotifications) {
-              return;
-          }
-          var diff = [],
-              arrayLength = rawArray.length,
-              argsLength = args.length,
-              offset = 0;
-
-          function pushDiff(status, value, index) {
-              return diff[diff.length] = { 'status': status, 'value': value, 'index': index };
-          }
-          switch (operationName) {
-          case 'push':
-              offset = arrayLength;
-          case 'unshift':
-              for (index = 0; index < argsLength; index++) {
-                  pushDiff('added', args[index], offset + index);
-              }
-              break;
-
-          case 'pop':
-              offset = arrayLength - 1;
-          case 'shift':
-              if (arrayLength) {
-                  pushDiff('deleted', rawArray[offset], offset);
-              }
-              break;
-
-          case 'splice':
-              // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].
-              // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
-              var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),
-                  endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),
-                  endAddIndex = startIndex + argsLength - 2,
-                  endIndex = Math.max(endDeleteIndex, endAddIndex),
-                  additions = [], deletions = [];
-              for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {
-                  if (index < endDeleteIndex)
-                      deletions.push(pushDiff('deleted', rawArray[index], index));
-                  if (index < endAddIndex)
-                      additions.push(pushDiff('added', args[argsIndex], index));
-              }
-              findMovesInArrayComparison(deletions, additions);
-              break;
-
-          default:
-              return;
-          }
-          cachedDiff = diff;
-      };
-  }
-
-
-  // Expose compareArrays for testing.
-  trackArrayChanges.compareArrays = compareArrays;
-
-
-  // Add the trackArrayChanges extender so we can use
-  // obs.extend({ trackArrayChanges: true })
-  extenders.trackArrayChanges = trackArrayChanges;
-
-  function observableArray(initialValues) {
-      initialValues = initialValues || [];
-
-      if (typeof initialValues != 'object' || !('length' in initialValues))
-          throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
-
-      var result = observable(initialValues);
-      setPrototypeOfOrExtend(result, observableArray.fn);
-      trackArrayChanges(result);
-          // ^== result.extend({ trackArrayChanges: true })
-      return result;
-  }
-
-  observableArray.fn = {
-      remove: function (valueOrPredicate) {
-          var underlyingArray = this.peek();
-          var removedValues = [];
-          var predicate = typeof valueOrPredicate == "function" && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-          for (var i = 0; i < underlyingArray.length; i++) {
-              var value = underlyingArray[i];
-              if (predicate(value)) {
-                  if (removedValues.length === 0) {
-                      this.valueWillMutate();
-                  }
-                  removedValues.push(value);
-                  underlyingArray.splice(i, 1);
-                  i--;
-              }
-          }
-          if (removedValues.length) {
-              this.valueHasMutated();
-          }
-          return removedValues;
-      },
-
-      removeAll: function (arrayOfValues) {
-          // If you passed zero args, we remove everything
-          if (arrayOfValues === undefined) {
-              var underlyingArray = this.peek();
-              var allValues = underlyingArray.slice(0);
-              this.valueWillMutate();
-              underlyingArray.splice(0, underlyingArray.length);
-              this.valueHasMutated();
-              return allValues;
-          }
-          // If you passed an arg, we interpret it as an array of entries to remove
-          if (!arrayOfValues)
-              return [];
-          return this['remove'](function (value) {
-              return arrayIndexOf(arrayOfValues, value) >= 0;
-          });
-      },
-
-      destroy: function (valueOrPredicate) {
-          var underlyingArray = this.peek();
-          var predicate = typeof valueOrPredicate == "function" && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-          this.valueWillMutate();
-          for (var i = underlyingArray.length - 1; i >= 0; i--) {
-              var value = underlyingArray[i];
-              if (predicate(value))
-                  underlyingArray[i]["_destroy"] = true;
-          }
-          this.valueHasMutated();
-      },
-
-      destroyAll: function (arrayOfValues) {
-          // If you passed zero args, we destroy everything
-          if (arrayOfValues === undefined)
-              return this.destroy(function() { return true; });
-
-          // If you passed an arg, we interpret it as an array of entries to destroy
-          if (!arrayOfValues)
-              return [];
-          return this.destroy(function (value) {
-              return arrayIndexOf(arrayOfValues, value) >= 0;
-          });
-      },
-
-      indexOf: function (item) {
-          var underlyingArray = this();
-          return arrayIndexOf(underlyingArray, item);
-      },
-
-      replace: function(oldItem, newItem) {
-          var index = this.indexOf(oldItem);
-          if (index >= 0) {
-              this.valueWillMutate();
-              this.peek()[index] = newItem;
-              this.valueHasMutated();
-          }
-      }
-  };
-
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the ko.observableArray constructor
-  if (canSetPrototype) {
-      setPrototypeOf(observableArray.fn, observable.fn);
-  }
-
-  // Populate ko.observableArray.fn with read/write functions from native arrays
-  // Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
-  // because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
-  arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
-      observableArray.fn[methodName] = function () {
-          // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
-          // (for consistency with mutating regular observables)
-          var underlyingArray = this.peek();
-          this.valueWillMutate();
-          this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);
-          var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
-          this.valueHasMutated();
-          // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.
-          return methodCallResult === underlyingArray ? this : methodCallResult;
-      };
-  });
-
-  // Populate ko.observableArray.fn with read-only functions from native arrays
-  arrayForEach(["slice"], function (methodName) {
-      observableArray.fn[methodName] = function () {
-          var underlyingArray = this();
-          return underlyingArray[methodName].apply(underlyingArray, arguments);
-      };
-  });
-
-  var computedState = createSymbolOrString('_state');
-
-  function computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$) {
-      if (typeof evaluatorFunctionOrOptions === "object") {
-          // Single-parameter syntax - everything is on this "options" param
-          options$$ = evaluatorFunctionOrOptions;
-      } else {
-          // Multi-parameter syntax - construct the options according to the params passed
-          options$$ = options$$ || {};
-          if (evaluatorFunctionOrOptions) {
-              options$$.read = evaluatorFunctionOrOptions;
-          }
-      }
-      if (typeof options$$.read != "function")
-          throw Error("Pass a function that returns the value of the computed");
-
-      var writeFunction = options$$.write;
-      var state = {
-          latestValue: undefined,
-          isStale: true,
-          isBeingEvaluated: false,
-          suppressDisposalUntilDisposeWhenReturnsFalse: false,
-          isDisposed: false,
-          pure: false,
-          isSleeping: false,
-          readFunction: options$$.read,
-          evaluatorFunctionTarget: evaluatorFunctionTarget || options$$.owner,
-          disposeWhenNodeIsRemoved: options$$.disposeWhenNodeIsRemoved || options$$.disposeWhenNodeIsRemoved || null,
-          disposeWhen: options$$.disposeWhen || options$$.disposeWhen,
-          domNodeDisposalCallback: null,
-          dependencyTracking: {},
-          dependenciesCount: 0,
-          evaluationTimeoutInstance: null
-      };
-
-      function computedObservable() {
-          if (arguments.length > 0) {
-              if (typeof writeFunction === "function") {
-                  // Writing a value
-                  writeFunction.apply(state.evaluatorFunctionTarget, arguments);
-              } else {
-                  throw new Error("Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.");
-              }
-              return this; // Permits chained assignments
-          } else {
-              // Reading the value
-              registerDependency(computedObservable);
-              if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {
-                  computedObservable.evaluateImmediate();
-              }
-              return state.latestValue;
-          }
-      }
-
-      computedObservable[computedState] = state;
-      computedObservable.hasWriteFunction = typeof writeFunction === "function";
-
-      // Inherit from 'subscribable'
-      if (!canSetPrototype) {
-          // 'subscribable' won't be on the prototype chain unless we put it there directly
-          extend(computedObservable, subscribable.fn);
-      }
-      subscribable.fn.init(computedObservable);
-
-      // Inherit from 'computed'
-      setPrototypeOfOrExtend(computedObservable, computed.fn);
-
-      if (options$$.pure) {
-          state.pure = true;
-          state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription
-          extend(computedObservable, pureComputedOverrides);
-      } else if (options$$.deferEvaluation) {
-          extend(computedObservable, deferEvaluationOverrides);
-      }
-
-      if (options.deferUpdates) {
-          extenders.deferred(computedObservable, true);
-      }
-
-      if (options.debug) {
-          // #1731 - Aid debugging by exposing the computed's options
-          computedObservable._options = options$$;
-      }
-
-      if (state.disposeWhenNodeIsRemoved) {
-          // Since this computed is associated with a DOM node, and we don't want to dispose the computed
-          // until the DOM node is *removed* from the document (as opposed to never having been in the document),
-          // we'll prevent disposal until "disposeWhen" first returns false.
-          state.suppressDisposalUntilDisposeWhenReturnsFalse = true;
-
-          // disposeWhenNodeIsRemoved: true can be used to opt into the "only dispose after first false result"
-          // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try
-          // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't
-          // be documented or used by application code, as it's likely to change in a future version of KO.
-          if (!state.disposeWhenNodeIsRemoved.nodeType) {
-              state.disposeWhenNodeIsRemoved = null;
-          }
-      }
-
-      // Evaluate, unless sleeping or deferEvaluation is true
-      if (!state.isSleeping && !options$$.deferEvaluation) {
-          computedObservable.evaluateImmediate();
-      }
-
-      // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is
-      // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).
-      if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {
-          addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {
-              computedObservable.dispose();
-          });
-      }
-
-      return computedObservable;
-  }
-
-  // Utility function that disposes a given dependencyTracking entry
-  function computedDisposeDependencyCallback(id, entryToDispose) {
-      if (entryToDispose !== null && entryToDispose.dispose) {
-          entryToDispose.dispose();
-      }
-  }
-
-  // This function gets called each time a dependency is detected while evaluating a computed.
-  // It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.
-  function computedBeginDependencyDetectionCallback(subscribable, id) {
-      var computedObservable = this.computedObservable,
-          state = computedObservable[computedState];
-      if (!state.isDisposed) {
-          if (this.disposalCount && this.disposalCandidates[id]) {
-              // Don't want to dispose this subscription, as it's still being used
-              computedObservable.addDependencyTracking(id, subscribable, this.disposalCandidates[id]);
-              this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway
-              --this.disposalCount;
-          } else if (!state.dependencyTracking[id]) {
-              // Brand new subscription - add it
-              computedObservable.addDependencyTracking(id, subscribable, state.isSleeping ? { _target: subscribable } : computedObservable.subscribeToDependency(subscribable));
-          }
-      }
-  }
-
-  computed.fn = {
-      equalityComparer: valuesArePrimitiveAndEqual,
-      getDependenciesCount: function () {
-          return this[computedState].dependenciesCount;
-      },
-      addDependencyTracking: function (id, target, trackingObj) {
-          if (this[computedState].pure && target === this) {
-              throw Error("A 'pure' computed must not be called recursively");
-          }
-
-          this[computedState].dependencyTracking[id] = trackingObj;
-          trackingObj._order = this[computedState].dependenciesCount++;
-          trackingObj._version = target.getVersion();
-      },
-      haveDependenciesChanged: function () {
-          var id, dependency, dependencyTracking = this[computedState].dependencyTracking;
-          for (id in dependencyTracking) {
-              if (dependencyTracking.hasOwnProperty(id)) {
-                  dependency = dependencyTracking[id];
-                  if (dependency._target.hasChanged(dependency._version)) {
-                      return true;
-                  }
-              }
-          }
-      },
-      markDirty: function () {
-          // Process "dirty" events if we can handle delayed notifications
-          if (this._evalDelayed && !this[computedState].isBeingEvaluated) {
-              this._evalDelayed();
-          }
-      },
-      isActive: function () {
-          return this[computedState].isStale || this[computedState].dependenciesCount > 0;
-      },
-      respondToChange: function () {
-          // Ignore "change" events if we've already scheduled a delayed notification
-          if (!this._notificationIsPending) {
-              this.evaluatePossiblyAsync();
-          }
-      },
-      subscribeToDependency: function (target) {
-          if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {
-              var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),
-                  changeSub = target.subscribe(this.respondToChange, this);
-              return {
-                  _target: target,
-                  dispose: function () {
-                      dirtySub.dispose();
-                      changeSub.dispose();
-                  }
-              };
-          } else {
-              return target.subscribe(this.evaluatePossiblyAsync, this);
-          }
-      },
-      evaluatePossiblyAsync: function () {
-          var computedObservable = this,
-              throttleEvaluationTimeout = computedObservable.throttleEvaluation;
-          if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
-              clearTimeout(this[computedState].evaluationTimeoutInstance);
-              this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {
-                  computedObservable.evaluateImmediate(true /*notifyChange*/);
-              }, throttleEvaluationTimeout);
-          } else if (computedObservable._evalDelayed) {
-              computedObservable._evalDelayed();
-          } else {
-              computedObservable.evaluateImmediate(true /*notifyChange*/);
-          }
-      },
-      evaluateImmediate: function (notifyChange) {
-          var computedObservable = this,
-              state = computedObservable[computedState],
-              disposeWhen = state.disposeWhen;
-
-          if (state.isBeingEvaluated) {
-              // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
-              // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
-              // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
-              // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
-              return;
-          }
-
-          // Do not evaluate (and possibly capture new dependencies) if disposed
-          if (state.isDisposed) {
-              return;
-          }
-
-          if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {
-              // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse
-              if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {
-                  computedObservable.dispose();
-                  return;
-              }
-          } else {
-              // It just did return false, so we can stop suppressing now
-              state.suppressDisposalUntilDisposeWhenReturnsFalse = false;
-          }
-
-          state.isBeingEvaluated = true;
-          try {
-              this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);
-          } finally {
-              state.isBeingEvaluated = false;
-          }
-
-          if (!state.dependenciesCount) {
-              computedObservable.dispose();
-          }
-      },
-      evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {
-          // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.
-          // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,
-          // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).
-
-          var computedObservable = this,
-              state = computedObservable[computedState];
-
-          // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
-          // Then, during evaluation, we cross off any that are in fact still being used.
-          var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time
-              dependencyDetectionContext = {
-                  computedObservable: computedObservable,
-                  disposalCandidates: state.dependencyTracking,
-                  disposalCount: state.dependenciesCount
-              };
-
-          begin({
-              callbackTarget: dependencyDetectionContext,
-              callback: computedBeginDependencyDetectionCallback,
-              computed: computedObservable,
-              isInitial: isInitial
-          });
-
-          state.dependencyTracking = {};
-          state.dependenciesCount = 0;
-
-          var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);
-
-          if (computedObservable.isDifferent(state.latestValue, newValue)) {
-              if (!state.isSleeping) {
-                  computedObservable.notifySubscribers(state.latestValue, "beforeChange");
-              }
-
-              state.latestValue = newValue;
-
-              if (state.isSleeping) {
-                  computedObservable.updateVersion();
-              } else if (notifyChange) {
-                  computedObservable.notifySubscribers(state.latestValue);
-              }
-          }
-
-          if (isInitial) {
-              computedObservable.notifySubscribers(state.latestValue, "awake");
-          }
-      },
-      evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {
-          // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.
-          // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection
-          // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU
-          // overhead of computed evaluation (on V8 at least).
-
-          try {
-              var readFunction = state.readFunction;
-              return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();
-          } finally {
-              end();
-
-              // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
-              if (dependencyDetectionContext.disposalCount && !state.isSleeping) {
-                  objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);
-              }
-
-              state.isStale = false;
-          }
-      },
-      peek: function () {
-          // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when "deferEvaluation" is set.
-          var state = this[computedState];
-          if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {
-              this.evaluateImmediate();
-          }
-          return state.latestValue;
-      },
-      limit: function (limitFunction) {
-          // Override the limit function with one that delays evaluation as well
-          subscribable.fn.limit.call(this, limitFunction);
-          this._evalDelayed = function () {
-              this._limitBeforeChange(this[computedState].latestValue);
-
-              this[computedState].isStale = true; // Mark as dirty
-
-              // Pass the observable to the "limit" code, which will access it when
-              // it's time to do the notification.
-              this._limitChange(this);
-          };
-      },
-      dispose: function () {
-          var state = this[computedState];
-          if (!state.isSleeping && state.dependencyTracking) {
-              objectForEach(state.dependencyTracking, function (id, dependency) {
-                  if (dependency.dispose)
-                      dependency.dispose();
-              });
-          }
-          if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {
-              removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);
-          }
-          state.dependencyTracking = null;
-          state.dependenciesCount = 0;
-          state.isDisposed = true;
-          state.isStale = false;
-          state.isSleeping = false;
-          state.disposeWhenNodeIsRemoved = null;
-          state.readFunction = null;
-          if (options.debug) {
-              this._options = null;
-          }
-      }
-  };
-
-  var pureComputedOverrides = {
-      beforeSubscriptionAdd: function (event) {
-          // If asleep, wake up the computed by subscribing to any dependencies.
-          var computedObservable = this,
-              state = computedObservable[computedState];
-          if (!state.isDisposed && state.isSleeping && event == 'change') {
-              state.isSleeping = false;
-              if (state.isStale || computedObservable.haveDependenciesChanged()) {
-                  state.dependencyTracking = null;
-                  state.dependenciesCount = 0;
-                  state.isStale = true;
-                  computedObservable.evaluateImmediate();
-              } else {
-                  // First put the dependencies in order
-                  var dependeciesOrder = [];
-                  objectForEach(state.dependencyTracking, function (id, dependency) {
-                      dependeciesOrder[dependency._order] = id;
-                  });
-                  // Next, subscribe to each one
-                  arrayForEach(dependeciesOrder, function (id, order) {
-                      var dependency = state.dependencyTracking[id],
-                          subscription = computedObservable.subscribeToDependency(dependency._target);
-                      subscription._order = order;
-                      subscription._version = dependency._version;
-                      state.dependencyTracking[id] = subscription;
-                  });
-              }
-              if (!state.isDisposed) {     // test since evaluating could trigger disposal
-                  computedObservable.notifySubscribers(state.latestValue, "awake");
-              }
-          }
-      },
-      afterSubscriptionRemove: function (event) {
-          var state = this[computedState];
-          if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {
-              objectForEach(state.dependencyTracking, function (id, dependency) {
-                  if (dependency.dispose) {
-                      state.dependencyTracking[id] = {
-                          _target: dependency._target,
-                          _order: dependency._order,
-                          _version: dependency._version
-                      };
-                      dependency.dispose();
-                  }
-              });
-              state.isSleeping = true;
-              this.notifySubscribers(undefined, "asleep");
-          }
-      },
-      getVersion: function () {
-          // Because a pure computed is not automatically updated while it is sleeping, we can't
-          // simply return the version number. Instead, we check if any of the dependencies have
-          // changed and conditionally re-evaluate the computed observable.
-          var state = this[computedState];
-          if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {
-              this.evaluateImmediate();
-          }
-          return subscribable.fn.getVersion.call(this);
-      }
-  };
-
-  var deferEvaluationOverrides = {
-      beforeSubscriptionAdd: function (event) {
-          // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.
-          if (event == 'change' || event == 'beforeChange') {
-              this.peek();
-          }
-      }
-  };
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the ko.computed constructor
-  if (canSetPrototype) {
-      setPrototypeOf(computed.fn, subscribable.fn);
-  }
-
-  // Set the proto chain values for ko.hasPrototype
-  var protoProp = observable.protoProperty; // == "__ko_proto__"
-  computed[protoProp] = observable;
-  computed.fn[protoProp] = computed;
-
-  function throttleExtender(target, timeout) {
-      // Throttling means two things:
-
-      // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
-      //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
-      target.throttleEvaluation = timeout;
-
-      // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
-      //     so the target cannot change value synchronously or faster than a certain rate
-      var writeTimeoutInstance = null;
-      return computed({
-          read: target,
-          write: function(value) {
-              clearTimeout(writeTimeoutInstance);
-              writeTimeoutInstance = setTimeout(function() {
-                  target(value);
-              }, timeout);
-          }
-      });
-  }
-
-
-  extenders.throttle = throttleExtender;
-
-  var storedBindingContextDomDataKey = nextKey();
-
-
-
-  // The bindingContext constructor is only called directly to create the root context. For child
-  // contexts, use bindingContext.createChildContext or bindingContext.extend.
-  function bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {
-
-      var self = this,
-          isFunc = typeof(dataItemOrAccessor) == "function" && !isObservable(dataItemOrAccessor),
-          nodes,
-          subscribable;
-
-      // The binding context object includes static properties for the current, parent, and root view models.
-      // If a view model is actually stored in an observable, the corresponding binding context object, and
-      // any child contexts, must be updated when the view model is changed.
-      function updateContext() {
-          // Most of the time, the context will directly get a view model object, but if a function is given,
-          // we call the function to retrieve the view model. If the function accesses any observables or returns
-          // an observable, the dependency is tracked, and those observables can later cause the binding
-          // context to be updated.
-          var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor,
-              dataItem = unwrap(dataItemOrObservable);
-
-          if (parentContext) {
-              // When a "parent" context is given, register a dependency on the parent context. Thus whenever the
-              // parent context is updated, this context will also be updated.
-              if (parentContext._subscribable)
-                  parentContext._subscribable();
-
-              // Copy $root and any custom properties from the parent context
-              extend(self, parentContext);
-
-              // Because the above copy overwrites our own properties, we need to reset them.
-              self._subscribable = subscribable;
-          } else {
-              self.$parents = [];
-              self.$root = dataItem;
-
-              // Export 'ko' in the binding context so it will be available in bindings and templates
-              // even if 'ko' isn't exported as a global, such as when using an AMD loader.
-              // See https://github.com/SteveSanderson/knockout/issues/490
-              self.ko = options.knockoutInstance;
-          }
-          self.$rawData = dataItemOrObservable;
-          self.$data = dataItem;
-          if (dataItemAlias)
-              self[dataItemAlias] = dataItem;
-
-          // The extendCallback function is provided when creating a child context or extending a context.
-          // It handles the specific actions needed to finish setting up the binding context. Actions in this
-          // function could also add dependencies to this binding context.
-          if (extendCallback)
-              extendCallback(self, parentContext, dataItem);
-
-          return self.$data;
-      }
-
-      function disposeWhen() {
-          return nodes && !anyDomNodeIsAttachedToDocument(nodes);
-      }
-
-      if (settings && settings.exportDependencies) {
-          // The "exportDependencies" option means that the calling code will track any dependencies and re-create
-          // the binding context when they change.
-          updateContext();
-          return;
-      }
-
-      subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });
-
-      // At this point, the binding context has been initialized, and the "subscribable" computed observable is
-      // subscribed to any observables that were accessed in the process. If there is nothing to track, the
-      // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in
-      // the context object.
-      if (subscribable.isActive()) {
-          self._subscribable = subscribable;
-
-          // Always notify because even if the model ($data) hasn't changed, other context properties might have changed
-          subscribable.equalityComparer = null;
-
-          // We need to be able to dispose of this computed observable when it's no longer needed. This would be
-          // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and
-          // we cannot assume that those nodes have any relation to each other. So instead we track any node that
-          // the context is attached to, and dispose the computed when all of those nodes have been cleaned.
-
-          // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates
-          nodes = [];
-          subscribable._addNode = function(node) {
-              nodes.push(node);
-              addDisposeCallback(node, function(node) {
-                  arrayRemoveItem(nodes, node);
-                  if (!nodes.length) {
-                      subscribable.dispose();
-                      self._subscribable = subscribable = undefined;
-                  }
-              });
-          };
-      }
-  }
-
-  // Extend the binding context hierarchy with a new view model object. If the parent context is watching
-  // any observables, the new child context will automatically get a dependency on the parent context.
-  // But this does not mean that the $data value of the child context will also get updated. If the child
-  // view model also depends on the parent view model, you must provide a function that returns the correct
-  // view model on each update.
-  bindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {
-      return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function(self, parentContext) {
-          // Extend the context hierarchy by setting the appropriate pointers
-          self.$parentContext = parentContext;
-          self.$parent = parentContext.$data;
-          self.$parents = (parentContext.$parents || []).slice(0);
-          self.$parents.unshift(self.$parent);
-          if (extendCallback)
-              extendCallback(self);
-      }, settings);
-  };
-
-  // Extend the binding context with new custom properties. This doesn't change the context hierarchy.
-  // Similarly to "child" contexts, provide a function here to make sure that the correct values are set
-  // when an observable view model is updated.
-  bindingContext.prototype.extend = function(properties) {
-      // If the parent context references an observable view model, "_subscribable" will always be the
-      // latest view model object. If not, "_subscribable" isn't set, and we can use the static "$data" value.
-      return new bindingContext(this._subscribable || this.$data, this, null, function(self, parentContext) {
-          // This "child" context doesn't directly track a parent observable view model,
-          // so we need to manually set the $rawData value to match the parent.
-          self.$rawData = parentContext.$rawData;
-          extend(self, typeof(properties) === "function" ? properties() : properties);
-      });
-  };
-
-  bindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {
-      return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { "exportDependencies": true });
-  };
-
-
-  function storedBindingContextForNode(node, bindingContext) {
-      if (arguments.length == 2) {
-          set(node, storedBindingContextDomDataKey, bindingContext);
-          if (bindingContext._subscribable)
-              bindingContext._subscribable._addNode(node);
-      } else {
-          return get(node, storedBindingContextDomDataKey);
-      }
-  }
-
-  // The following element types will not be recursed into during binding.
-  var bindingDoesNotRecurseIntoElementTypes = {
-      // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,
-      // because it's unexpected and a potential XSS issue.
-      // Also bindings should not operate on <template> elements since this breaks in Internet Explorer
-      // and because such elements' contents are always intended to be bound in a different context
-      // from where they appear in the document.
-      'script': true,
-      'textarea': true,
-      'template': true
-  };
-
-  // Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers
-  function getBindingHandler(bindingKey) {
-      return options.bindingProviderInstance.bindingHandlers.get(bindingKey);
-  }
-
-
-  // Returns the value of a valueAccessor function
-  function evaluateValueAccessor(valueAccessor) {
-      return valueAccessor();
-  }
-
-  // Given a function that returns bindings, create and return a new object that contains
-  // binding value-accessors functions. Each accessor function calls the original function
-  // so that it always gets the latest value and all dependencies are captured. This is used
-  // by ko.applyBindingsToNode and getBindingsAndMakeAccessors.
-  function makeAccessorsFromFunction(callback) {
-      return objectMap(ignore(callback), function(value, key) {
-          return function() {
-              return callback()[key];
-          };
-      });
-  }
-
-  // This function is used if the binding provider doesn't include a getBindingAccessors function.
-  // It must be called with 'this' set to the provider instance.
-  function getBindingsAndMakeAccessors(node, context) {
-      return makeAccessorsFromFunction(this.getBindings.bind(this, node, context));
-  }
-
-  function validateThatBindingIsAllowedForVirtualElements(bindingName) {
-      var bindingHandler = options.bindingProviderInstance.bindingHandlers[bindingName],
-          validator;
-      if (typeof bindingHandler === 'function') {
-          validator = bindingHandler.allowVirtualElements || (
-              typeof bindingHandler.prototype === 'object' &&
-              Boolean(bindingHandler.prototype.allowVirtualElements)
-          );
-      } else {
-          validator = bindingHandler.allowVirtualElements || allowedBindings[bindingName];
-      }
-      if (!validator)
-          throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements");
-  }
-
-  function applyBindingsToDescendantsInternal (bindingContext, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) {
-      var currentChild,
-          nextInQueue = firstChild(elementOrVirtualElement),
-          provider = options.bindingProviderInstance,
-          preprocessNode = provider.preprocessNode;
-
-      // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's
-      // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to
-      // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that
-      // trigger insertion of <template> contents at that point in the document.
-      if (preprocessNode) {
-          while (currentChild = nextInQueue) {
-              nextInQueue = nextSibling(currentChild);
-              preprocessNode.call(provider, currentChild);
-          }
-          // Reset nextInQueue for the next loop
-          nextInQueue = firstChild(elementOrVirtualElement);
-      }
-
-      while (currentChild = nextInQueue) {
-          // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
-          nextInQueue = nextSibling(currentChild);
-          applyBindingsToNodeAndDescendantsInternal(bindingContext, currentChild, bindingContextsMayDifferFromDomParentElement);
-      }
-  }
-
-  function applyBindingsToNodeAndDescendantsInternal (bindingContext, nodeVerified, bindingContextMayDifferFromDomParentElement) {
-      var shouldBindDescendants = true;
-
-      // Perf optimisation: Apply bindings only if...
-      // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
-      //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
-      // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
-      var isElement = (nodeVerified.nodeType === 1);
-      if (isElement) // Workaround IE <= 8 HTML parsing weirdness
-          normaliseVirtualElementDomStructure(nodeVerified);
-
-      var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement)             // Case (1)
-                             || options.bindingProviderInstance.nodeHasBindings(nodeVerified);       // Case (2)
-      if (shouldApplyBindings)
-          shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, bindingContext, bindingContextMayDifferFromDomParentElement).shouldBindDescendants;
-
-      if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {
-          // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
-          //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
-          //    hence bindingContextsMayDifferFromDomParentElement is false
-          //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
-          //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
-          //    hence bindingContextsMayDifferFromDomParentElement is true
-          applyBindingsToDescendantsInternal(bindingContext, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement);
-      }
-  }
-
-  var boundElementDomDataKey = nextKey();
-
-
-  function topologicalSortBindings(bindings) {
-      // Depth-first sort
-      var result = [],                // The list of key/handler pairs that we will return
-          bindingsConsidered = {},    // A temporary record of which bindings are already in 'result'
-          cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it
-      objectForEach(bindings, function pushBinding(bindingKey) {
-          if (!bindingsConsidered[bindingKey]) {
-              var binding = getBindingHandler(bindingKey);
-              if (binding) {
-                  // First add dependencies (if any) of the current binding
-                  if (binding.after) {
-                      cyclicDependencyStack.push(bindingKey);
-                      arrayForEach(binding.after, function(bindingDependencyKey) {
-                          if (bindings[bindingDependencyKey]) {
-                              if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {
-                                  throw Error("Cannot combine the following bindings, because they have a cyclic dependency: " + cyclicDependencyStack.join(", "));
-                              } else {
-                                  pushBinding(bindingDependencyKey);
-                              }
-                          }
-                      });
-                      cyclicDependencyStack.length--;
-                  }
-                  // Next add the current binding
-                  result.push({ key: bindingKey, handler: binding });
-              }
-              bindingsConsidered[bindingKey] = true;
-          }
-      });
-
-      return result;
-  }
-
-  // This is called when the bindingHandler is an object (with `init` and/or
-  // `update` methods)
-  function execObjectBindingHandlerOnNode(bindingKeyAndHandler, node, getValueAccessor, allBindings, bindingContext, reportBindingError) {
-      var handlerInitFn = bindingKeyAndHandler.handler["init"],
-          handlerUpdateFn = bindingKeyAndHandler.handler["update"],
-          bindingKey = bindingKeyAndHandler.key,
-          controlsDescendantBindings = false;
-
-      // Run init, ignoring any dependencies
-      if (typeof handlerInitFn === "function") {
-          try {
-              ignore(function() {
-                  var initResult = handlerInitFn(node, getValueAccessor(bindingKey), allBindings, bindingContext.$data, bindingContext);
-
-                  // If this binding handler claims to control descendant bindings, make a note of this
-                  if (initResult && initResult.controlsDescendantBindings) {
-                      controlsDescendantBindings = true;
-                  }
-              });
-          } catch(ex) {
-              reportBindingError('init', ex);
-          }
-      }
-
-      // Run update in its own computed wrapper
-      if (typeof handlerUpdateFn === "function") {
-          computed(
-              function() {
-                  try {
-                      handlerUpdateFn(node, getValueAccessor(bindingKey), allBindings, bindingContext.$data, bindingContext);
-                  } catch (ex) {
-                      reportBindingError('update', ex);
-                  }
-              },
-              null,
-              { disposeWhenNodeIsRemoved: node }
-          );
-      }
-      return controlsDescendantBindings;
-  }
-
-  // This is called when the bindingHandler is a function (or ES6 class).
-  // Node that these will work only for browsers with Object.defineProperty,
-  // i.e. IE9+.
-  function execNewBindingHandlerOnNode(bindingKeyAndHandler, node, getValueAccessor, allBindings, bindingContext, reportBindingError) {
-      var bindingKey = bindingKeyAndHandler.key,
-          handlerParams = {
-              element: node,
-              $data: bindingContext.$data,
-              $context: bindingContext,
-              allBindings: allBindings
-          },
-          handlerConstructor = bindingKeyAndHandler.handler,
-          handlerInstance,
-          subscriptions = [];
-
-      Object.defineProperty(handlerParams, 'value', {
-          get: function () { return getValueAccessor(bindingKey)(); }
-      });
-
-      function handlerConstructorWrapper() {
-          handlerInstance = this;
-
-          // The handler instance will have properties `computed` and
-          // `subscribe`, which are almost the same as the `ko.-` equivalent
-          // except their lifecycle is limited to that of the node (i.e.
-          // they are automatically disposed).
-          this.computed = function handlerInstanceComputed(functionOrObject) {
-              var settings = typeof functionOrObject === 'function' ?
-                  { read: functionOrObject, write: functionOrObject } :
-                  functionOrObject;
-              extend(settings, {
-                  owner: handlerInstance,
-                  disposeWhenNodeIsRemoved: node
-              });
-              return computed(settings);
-          };
-
-          this.subscribe = function handlerInstanceSubscription(subscribable, callback, eventType) {
-              subscriptions.push(
-                  subscribable.subscribe(callback, handlerInstance, eventType)
-              );
-          };
-
-          this.value = this.computed(function () {
-              return getValueAccessor(bindingKey)();
-          });
-
-          handlerConstructor.call(this, handlerParams);
-      }
-
-      // We have to wrap the handler instance in this "subclass" because
-      // it's the only way to define this.computed/subscribe before the
-      // handlerConstructor is called, and one would expect those
-      // utilities to be available in the constructor.
-      extend(handlerConstructorWrapper, handlerConstructor);
-      handlerConstructorWrapper.prototype = handlerConstructor.prototype;
-
-      try {
-          new handlerConstructorWrapper();
-      } catch(ex) {
-          reportBindingError('construction', ex);
-      }
-
-      addDisposeCallback(node, function () {
-          if (typeof handlerInstance.dispose === "function") {
-              handlerInstance.dispose.call(handlerInstance);
-          }
-          arrayForEach(subscriptions, function (subs) {
-              subs.dispose();
-          });
-      });
-
-      return handlerConstructor.controlsDescendantBindings || handlerInstance.controlsDescendantBindings;
-  }
-
-  function applyBindingsToNodeInternal(node, sourceBindings, bindingContext, bindingContextMayDifferFromDomParentElement) {
-
-      // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated
-      function allBindings() {
-          return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);
-      }
-      // The following is the 3.x allBindings API
-      allBindings.get = function(key) {
-          return bindings[key] && evaluateValueAccessor(getValueAccessor(key));
-      };
-      allBindings.has = function(key) {
-          return key in bindings;
-      };
-
-      // Prevent multiple applyBindings calls for the same node, except when a binding value is specified
-      var alreadyBound = get(node, boundElementDomDataKey);
-      if (!sourceBindings) {
-          if (alreadyBound) {
-              onBindingError({
-                  during: 'apply',
-                  errorCaptured: new Error("You cannot apply bindings multiple times to the same element."),
-                  element: node,
-                  bindingContext: bindingContext
-              });
-              return false;
-          }
-          set(node, boundElementDomDataKey, true);
-      }
-
-      // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
-      // we can easily recover it just by scanning up the node's ancestors in the DOM
-      // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
-      if (!alreadyBound && bindingContextMayDifferFromDomParentElement)
-          storedBindingContextForNode(node, bindingContext);
-
-      // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings
-      var bindings;
-      if (sourceBindings && typeof sourceBindings !== 'function') {
-          bindings = sourceBindings;
-      } else {
-          var provider = options.bindingProviderInstance,
-              getBindings = provider.getBindingAccessors || getBindingsAndMakeAccessors;
-
-          // Get the binding from the provider within a computed observable so that we can update the bindings whenever
-          // the binding context is updated or if the binding provider accesses observables.
-          var bindingsUpdater = computed(
-              function() {
-                  bindings = sourceBindings ? sourceBindings(bindingContext, node) : getBindings.call(provider, node, bindingContext);
-                  // Register a dependency on the binding context to support observable view models.
-                  if (bindings && bindingContext._subscribable)
-                      bindingContext._subscribable();
-                  return bindings;
-              },
-              null, { disposeWhenNodeIsRemoved: node }
-          );
-
-          if (!bindings || !bindingsUpdater.isActive())
-              bindingsUpdater = null;
-      }
-
-      var bindingHandlerThatControlsDescendantBindings;
-      if (bindings) {
-          // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding
-          // context update), just return the value accessor from the binding. Otherwise, return a function that always gets
-          // the latest binding value and registers a dependency on the binding updater.
-          var getValueAccessor = bindingsUpdater
-              ? function (bindingKey) {
-                  return function(optionalValue) {
-                      var valueAccessor = bindingsUpdater()[bindingKey];
-                      if (arguments.length === 0) {
-                          return evaluateValueAccessor(valueAccessor);
-                      } else {
-                          return valueAccessor(optionalValue);
-                      }
-                  };
-              } : function (bindingKey) { return bindings[bindingKey]; };
-
-          // First put the bindings into the right order
-          var orderedBindings = topologicalSortBindings(bindings);
-
-          // Go through the sorted bindings, calling init and update for each
-          arrayForEach(orderedBindings, function(bindingKeyAndHandler) {
-              var bindingKey = bindingKeyAndHandler.key,
-                  controlsDescendantBindings,
-                  execBindingFunction = typeof bindingKeyAndHandler.handler === 'function' ?
-                      execNewBindingHandlerOnNode :
-                      execObjectBindingHandlerOnNode;
-
-              if (node.nodeType === 8) {
-                  validateThatBindingIsAllowedForVirtualElements(bindingKey);
-              }
-
-              function reportBindingError(during, errorCaptured) {
-                  onBindingError({
-                      during: during,
-                      errorCaptured: errorCaptured,
-                      element: node,
-                      bindingKey: bindingKey,
-                      bindings: bindings,
-                      allBindings: allBindings,
-                      valueAccessor: getValueAccessor(bindingKey),
-                      bindingContext: bindingContext
-                  });
-              }
-
-              // Note that topologicalSortBindings has already filtered out any nonexistent binding handlers,
-              // so bindingKeyAndHandler.handler will always be nonnull.
-              controlsDescendantBindings = execBindingFunction(
-                  bindingKeyAndHandler, node, getValueAccessor,
-                  allBindings, bindingContext, reportBindingError);
-
-              if (controlsDescendantBindings) {
-                  if (bindingHandlerThatControlsDescendantBindings !== undefined)
-                      throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.");
-                  bindingHandlerThatControlsDescendantBindings = bindingKey;
-              }
-          });
-      }
-
-      return {
-          'shouldBindDescendants': bindingHandlerThatControlsDescendantBindings === undefined
-      };
-  }
-
-
-  function getBindingContext(viewModelOrBindingContext) {
-      return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)
-          ? viewModelOrBindingContext
-          : new bindingContext(viewModelOrBindingContext);
-  }
-
-  function applyBindingsToDescendants(viewModelOrBindingContext, rootNode) {
-      if (rootNode.nodeType === 1 || rootNode.nodeType === 8)
-          applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true);
-  }
-
-  function onBindingError(spec) {
-      var error, bindingText;
-      if (spec.bindingKey) {
-          // During: 'init' or initial 'update'
-          error = spec.errorCaptured;
-          bindingText = options.bindingProviderInstance.getBindingsString(spec.element);
-          spec.message = "Unable to process binding \"" + spec.bindingKey
-              + "\" in binding \"" + bindingText
-              + "\"\nMessage: " + error.message;
-      } else {
-          // During: 'apply'
-          error = spec.errorCaptured;
-      }
-      try {
-          extend(error, spec);
-      } catch (e) {
-          // Read-only error e.g. a DOMEXception.
-          spec.stack = error.stack;
-          error = new Error(error.message);
-          extend(error, spec);
-      }
-      options.onError(error);
-  }
-
-  var lastMappingResultDomDataKey = nextKey();
-  var deletedItemDummyValue = nextKey();
-
-  /**
-   * Test a node for whether it represents an "else" condition.
-   * @param  {HTMLElement}  node to be tested
-   * @return {Boolean}      true when
-   *
-   * Matches <!-- else -->
-   */
-  function isElseNode(node) {
-      return node.nodeType === 8 &&
-          node.nodeValue.trim().toLowerCase() === 'else';
-  }
-
-  function detectElse(element) {
-      var children = childNodes(element);
-      for (var i = 0, j = children.length; i < j; ++i) {
-          if (isElseNode(children[i])) { return true; }
-      }
-      return false;
-  }
-
-
-  /**
-   * Clone the nodes, returning `ifNodes`, `elseNodes`
-   * @param  {HTMLElement} element The nodes to be cloned
-   * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.
-   * @return {object}         Containing the cloned nodes.
-   */
-  function cloneIfElseNodes(element, hasElse) {
-      var children = childNodes(element),
-          ifNodes = [],
-          elseNodes = [],
-          target = ifNodes;
-        
-      for (var i = 0, j = children.length; i < j; ++i) {
-          if (hasElse && isElseNode(children[i])) {
-              target = elseNodes;
-              hasElse = false;
-          } else {
-              target.push(cleanNode(children[i].cloneNode(true)));
-          }
-      }
-      
-      return {
-          ifNodes: ifNodes,
-          elseNodes: elseNodes
-      };
-  }
-
-  /**
-   * Return any conditional that precedes the given node.
-   * @param  {HTMLElement} node To find the preceding conditional of
-   * @return {object}      { elseChainSatisfied: observable }
-   */
-  function getPrecedingConditional(node) {
-      do {
-          node = node.previousSibling;
-      } while(node && node.nodeType !== 1 && node.nodeType !== 8);
-      
-      if (!node) { return; }
-      
-      if (node.nodeType === 8) {
-          node = previousSibling(node);
-      }
-      
-      return get(node, 'conditional');
-  }
-
-
-  /**
-   * Create a DOMbinding that controls DOM nodes presence
-   *
-   * Covers e.g.
-   *
-   * 1. DOM Nodes contents
-   * 
-   * <div data-bind='if: x'>
-   * <!-- else --> ... an optional "if"
-   * </div>
-   * 
-   * 2. Virtual elements
-   *
-   * <!-- ko if: x -->
-   * <!-- else -->
-   * <!-- /ko -->
-   *
-   * 3. Else binding
-   * <div data-bind='if: x'></div>
-   * <div data-bind='else'></div>
-   */
-  function makeWithIfBinding(isWith, isNot, isElse, makeContextCallback) {
-      return {
-          init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
-
-              var didDisplayOnLastUpdate,
-                  hasElse = detectElse(element),
-                  completesElseChain = observable(),
-                  ifElseNodes,
-                  precedingConditional;
-
-              set(element, "conditional", {
-                  elseChainSatisfied: completesElseChain,
-              });
-
-              if (isElse) {
-                  precedingConditional = getPrecedingConditional(element);
-              }
-
-              computed(function() {
-                  var rawValue = valueAccessor(),
-                      dataValue = unwrap(rawValue),
-                      shouldDisplayIf = !isNot !== !dataValue || (isElse && rawValue === undefined), // equivalent to (isNot ? !dataValue : !!dataValue) || isElse && rawValue === undefined
-                      isFirstRender = !ifElseNodes,
-                      needsRefresh = isFirstRender || isWith || (shouldDisplayIf !== didDisplayOnLastUpdate);
-
-                  if (precedingConditional && precedingConditional.elseChainSatisfied()) {
-                      needsRefresh = shouldDisplayIf !== false;
-                      shouldDisplayIf = false;
-                      completesElseChain(true);
-                  } else {
-                      completesElseChain(shouldDisplayIf);
-                  }
-
-                  if (!needsRefresh) { return; }
-
-                  if (isFirstRender && (getDependenciesCount() || hasElse)) {
-                      ifElseNodes = cloneIfElseNodes(element, hasElse);
-                  }
-
-                  if (shouldDisplayIf) {
-                      if (!isFirstRender || hasElse) {
-                          setDomNodeChildren(element, cloneNodes(ifElseNodes.ifNodes));
-                      }
-                  } else if (ifElseNodes) {
-                      setDomNodeChildren(element, cloneNodes(ifElseNodes.elseNodes));
-                  } else {
-                      emptyNode(element);
-                  }
-
-                  applyBindingsToDescendants(makeContextCallback ? makeContextCallback(bindingContext, rawValue) : bindingContext, element);
-
-                  didDisplayOnLastUpdate = shouldDisplayIf;
-              }, null, { disposeWhenNodeIsRemoved: element });
-
-              return { 'controlsDescendantBindings': true };
-          },
-          allowVirtualElements: true,
-          bindingRewriteValidator: false
-      };
-  }
-
-  function withContextCallback(bindingContext, dataValue) {
-      return bindingContext.createStaticChildContext(dataValue);
-  }
-
-                                   /* isWith, isNot */
-  var $if =   makeWithIfBinding(false, false, false);
-  var ifnot = makeWithIfBinding(false, true, false);
-  var $else = makeWithIfBinding(false, false, true);
-  var $with = makeWithIfBinding(true, false, false, withContextCallback);
-
-  var bindings = {
-      'if': $if,
-      'with': $with,
-      ifnot: ifnot, unless: ifnot,
-      'else': $else,
-      'elseif': $else
-  };
-
-  exports.bindings = bindings;
-
-  Object.defineProperty(exports, '__esModule', { value: true });
-
-}));
\ No newline at end of file
diff --git a/packages/tko.binding.template/dist/tko.binding.template.js b/packages/tko.binding.template/dist/tko.binding.template.js
deleted file mode 100644
index 8265ab73..00000000
--- a/packages/tko.binding.template/dist/tko.binding.template.js
+++ /dev/null
@@ -1,3463 +0,0 @@
-(function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-  typeof define === 'function' && define.amd ? define(['exports'], factory) :
-  (factory((global.tko = global.tko || {}, global.tko.binding = global.tko.binding || {}, global.tko.binding.template = global.tko.binding.template || {})));
-}(this, function (exports) { 'use strict';
-
-  //
-  // Array utilities
-  //
-  /* eslint no-cond-assign: 0 */
-
-  function arrayForEach(array, action) {
-      for (var i = 0, j = array.length; i < j; i++)
-          action(array[i], i);
-  }
-
-  function arrayIndexOf(array, item) {
-      // IE9
-      if (typeof Array.prototype.indexOf == "function")
-          return Array.prototype.indexOf.call(array, item);
-      for (var i = 0, j = array.length; i < j; i++)
-          if (array[i] === item)
-              return i;
-      return -1;
-  }
-
-  function arrayFirst(array, predicate, predicateOwner) {
-      for (var i = 0, j = array.length; i < j; i++)
-          if (predicate.call(predicateOwner, array[i], i))
-              return array[i];
-      return null;
-  }
-
-  function arrayRemoveItem(array, itemToRemove) {
-      var index = arrayIndexOf(array, itemToRemove);
-      if (index > 0) {
-          array.splice(index, 1);
-      }
-      else if (index === 0) {
-          array.shift();
-      }
-  }
-
-  function arrayMap(array, mapping) {
-      array = array || [];
-      var result = [];
-      for (var i = 0, j = array.length; i < j; i++)
-          result.push(mapping(array[i], i));
-      return result;
-  }
-
-  function arrayFilter(array, predicate) {
-      array = array || [];
-      var result = [];
-      for (var i = 0, j = array.length; i < j; i++)
-          if (predicate(array[i], i))
-              result.push(array[i]);
-      return result;
-  }
-
-  function arrayPushAll(array, valuesToPush) {
-      if (valuesToPush instanceof Array)
-          array.push.apply(array, valuesToPush);
-      else
-          for (var i = 0, j = valuesToPush.length; i < j; i++)
-              array.push(valuesToPush[i]);
-      return array;
-  }
-
-  function makeArray(arrayLikeObject) {
-      var result = [];
-      for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
-          result.push(arrayLikeObject[i]);
-      }
-      return result;
-  }
-
-
-  // Go through the items that have been added and deleted and try to find matches between them.
-  function findMovesInArrayComparison(left, right, limitFailedCompares) {
-      if (left.length && right.length) {
-          var failedCompares, l, r, leftItem, rightItem;
-          for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
-              for (r = 0; rightItem = right[r]; ++r) {
-                  if (leftItem['value'] === rightItem['value']) {
-                      leftItem['moved'] = rightItem['index'];
-                      rightItem['moved'] = leftItem['index'];
-                      right.splice(r, 1);         // This item is marked as moved; so remove it from right list
-                      failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures
-                      break;
-                  }
-              }
-              failedCompares += r;
-          }
-      }
-  }
-
-
-
-  var statusNotInOld = 'added';
-  var statusNotInNew = 'deleted';
-  // Simple calculation based on Levenshtein distance.
-  function compareArrays(oldArray, newArray, options) {
-      // For backward compatibility, if the third arg is actually a bool, interpret
-      // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
-      options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
-      oldArray = oldArray || [];
-      newArray = newArray || [];
-
-      if (oldArray.length < newArray.length)
-          return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
-      else
-          return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
-  }
-
-
-  function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
-      var myMin = Math.min,
-          myMax = Math.max,
-          editDistanceMatrix = [],
-          smlIndex, smlIndexMax = smlArray.length,
-          bigIndex, bigIndexMax = bigArray.length,
-          compareRange = (bigIndexMax - smlIndexMax) || 1,
-          maxDistance = smlIndexMax + bigIndexMax + 1,
-          thisRow, lastRow,
-          bigIndexMaxForRow, bigIndexMinForRow;
-
-      for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
-          lastRow = thisRow;
-          editDistanceMatrix.push(thisRow = []);
-          bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
-          bigIndexMinForRow = myMax(0, smlIndex - 1);
-          for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
-              if (!bigIndex)
-                  thisRow[bigIndex] = smlIndex + 1;
-              else if (!smlIndex)  // Top row - transform empty array into new array via additions
-                  thisRow[bigIndex] = bigIndex + 1;
-              else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
-                  thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
-              else {
-                  var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
-                  var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
-                  thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
-              }
-          }
-      }
-
-      var editScript = [], meMinusOne, notInSml = [], notInBig = [];
-      for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
-          meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
-          if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
-              notInSml.push(editScript[editScript.length] = {     // added
-                  'status': statusNotInSml,
-                  'value': bigArray[--bigIndex],
-                  'index': bigIndex });
-          } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
-              notInBig.push(editScript[editScript.length] = {     // deleted
-                  'status': statusNotInBig,
-                  'value': smlArray[--smlIndex],
-                  'index': smlIndex });
-          } else {
-              --bigIndex;
-              --smlIndex;
-              if (!options['sparse']) {
-                  editScript.push({
-                      'status': "retained",
-                      'value': bigArray[bigIndex] });
-              }
-          }
-      }
-
-      // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
-      // smlIndexMax keeps the time complexity of this algorithm linear.
-      findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
-
-      return editScript.reverse();
-  }
-
-  //
-  // This becomes ko.options
-  // --
-  //
-  // This is the root 'options', which must be extended by others.
-
-  var options = {
-      deferUpdates: false,
-
-      useOnlyNativeEvents: false,
-
-      protoProperty: '__ko_proto__',
-
-      // Modify the default attribute from `data-bind`.
-      defaultBindingAttribute: 'data-bind',
-
-      // Enable/disable <!-- ko binding: ... -> style bindings
-      allowVirtualElements: true,
-
-      // Global variables that can be accessed from bindings.
-      bindingGlobals: window,
-
-      // An instance of the binding provider.
-      bindingProviderInstance: null,
-
-      // jQuery will be automatically set to window.jQuery in applyBindings
-      // if it is (strictly equal to) undefined.  Set it to false or null to
-      // disable automatically setting jQuery.
-      jQuery: window && window.jQuery,
-
-      taskScheduler: null,
-
-      debug: false,
-
-      onError: function (e) { throw e; },
-
-      set: function (name, value) {
-          options[name] = value;
-      }
-  };
-
-  Object.defineProperty(options, '$', {
-      get: function () { return options.jQuery; }
-  });
-
-  function catchFunctionErrors(delegate) {
-      return options.onError ? function () {
-          try {
-              return delegate.apply(this, arguments);
-          } catch (e) {
-              options.onError(e);
-          }
-      } : delegate;
-  }
-
-  function deferError(error) {
-      safeSetTimeout(function () { options.onError(error); }, 0);
-  }
-
-
-  function safeSetTimeout(handler, timeout) {
-      return setTimeout(catchFunctionErrors(handler), timeout);
-  }
-
-  function throttleFn(callback, timeout) {
-      var timeoutInstance;
-      return function () {
-          if (!timeoutInstance) {
-              timeoutInstance = safeSetTimeout(function () {
-                  timeoutInstance = undefined;
-                  callback();
-              }, timeout);
-          }
-      };
-  }
-
-  function debounceFn(callback, timeout) {
-      var timeoutInstance;
-      return function () {
-          clearTimeout(timeoutInstance);
-          timeoutInstance = safeSetTimeout(callback, timeout);
-      };
-  }
-
-  //
-  // Detection and Workarounds for Internet Explorer
-  //
-  /* eslint no-empty: 0 */
-
-  // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
-  // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
-  // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
-  // If there is a future need to detect specific versions of IE10+, we will amend this.
-  var ieVersion = document && (function() {
-      var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
-
-      // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
-      while (
-          div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
-          iElems[0]
-      ) {}
-      return version > 4 ? version : undefined;
-  }());
-
-  var isIe6 = ieVersion === 6;
-  var isIe7 = ieVersion === 7;
-
-  //
-  // Object functions
-  //
-
-  function extend(target, source) {
-      if (source) {
-          for(var prop in source) {
-              if(source.hasOwnProperty(prop)) {
-                  target[prop] = source[prop];
-              }
-          }
-      }
-      return target;
-  }
-
-  function objectForEach(obj, action) {
-      for (var prop in obj) {
-          if (obj.hasOwnProperty(prop)) {
-              action(prop, obj[prop]);
-          }
-      }
-  }
-
-
-  function objectMap(source, mapping) {
-      if (!source)
-          return source;
-      var target = {};
-      for (var prop in source) {
-          if (source.hasOwnProperty(prop)) {
-              target[prop] = mapping(source[prop], prop, source);
-          }
-      }
-      return target;
-  }
-
-  var protoProperty$1 = options.protoProperty;
-
-  var canSetPrototype = ({ __proto__: [] } instanceof Array);
-
-  function setPrototypeOf(obj, proto) {
-      obj.__proto__ = proto;
-      return obj;
-  }
-
-  var setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;
-
-  function hasPrototype(instance, prototype) {
-      if ((instance === null) || (instance === undefined) || (instance[protoProperty$1] === undefined)) return false;
-      if (instance[protoProperty$1] === prototype) return true;
-      return hasPrototype(instance[protoProperty$1], prototype); // Walk the prototype chain
-  }
-
-  //
-  // String (and JSON)
-  //
-
-
-  function stringTrim (string) {
-      return string === null || string === undefined ? '' :
-          string.trim ?
-              string.trim() :
-              string.toString().replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
-  }
-
-  //
-  // ES6 Symbols
-  //
-
-  var useSymbols = typeof Symbol === 'function';
-
-  function createSymbolOrString(identifier) {
-      return useSymbols ? Symbol(identifier) : identifier;
-  }
-
-  //
-  // jQuery
-  //
-  // TODO: deprecate in favour of options.$
-
-  var jQueryInstance = window && window.jQuery;
-
-  function domNodeIsContainedBy (node, containedByNode) {
-      if (node === containedByNode)
-          return true;
-      if (node.nodeType === 11)
-          return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8
-      if (containedByNode.contains)
-          return containedByNode.contains(node.nodeType === 3 ? node.parentNode : node);
-      if (containedByNode.compareDocumentPosition)
-          return (containedByNode.compareDocumentPosition(node) & 16) == 16;
-      while (node && node != containedByNode) {
-          node = node.parentNode;
-      }
-      return !!node;
-  }
-
-  function domNodeIsAttachedToDocument (node) {
-      return domNodeIsContainedBy(node, node.ownerDocument.documentElement);
-  }
-
-  function anyDomNodeIsAttachedToDocument(nodes) {
-      return !!arrayFirst(nodes, domNodeIsAttachedToDocument);
-  }
-
-  function tagNameLower(element) {
-      // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
-      // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
-      // we don't need to do the .toLowerCase() as it will always be lower case anyway.
-      return element && element.tagName && element.tagName.toLowerCase();
-  }
-
-  //
-  // DOM node data
-  //
-  // import {createSymbolOrString} from '../symbol.js'
-
-  var uniqueId = 0;
-  var dataStoreKeyExpandoPropertyName = "__ko__data" + new Date();
-  var dataStore = {};
-
-
-  function getAll(node, createIfNotFound) {
-      var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-      var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
-      if (!hasExistingDataStore) {
-          if (!createIfNotFound)
-              return undefined;
-          dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
-          dataStore[dataStoreKey] = {};
-      }
-      return dataStore[dataStoreKey];
-  }
-
-  function get(node, key) {
-      var allDataForNode = getAll(node, false);
-      return allDataForNode === undefined ? undefined : allDataForNode[key];
-  }
-
-  function set(node, key, value) {
-      if (value === undefined) {
-          // Make sure we don't actually create a new domData key if we are actually deleting a value
-          if (getAll(node, false) === undefined)
-              return;
-      }
-      var allDataForNode = getAll(node, true);
-      allDataForNode[key] = value;
-  }
-
-  function clear(node) {
-      var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-      if (dataStoreKey) {
-          delete dataStore[dataStoreKey];
-          node[dataStoreKeyExpandoPropertyName] = null;
-          return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
-      }
-      return false;
-  }
-
-  function nextKey() {
-      return (uniqueId++) + dataStoreKeyExpandoPropertyName;
-  }
-
-  var domDataKey = nextKey();
-  // Node types:
-  // 1: Element
-  // 8: Comment
-  // 9: Document
-  var cleanableNodeTypes = { 1: true, 8: true, 9: true };
-  var cleanableNodeTypesWithDescendants = { 1: true, 9: true };
-
-  function getDisposeCallbacksCollection(node, createIfNotFound) {
-      var allDisposeCallbacks = get(node, domDataKey);
-      if ((allDisposeCallbacks === undefined) && createIfNotFound) {
-          allDisposeCallbacks = [];
-          set(node, domDataKey, allDisposeCallbacks);
-      }
-      return allDisposeCallbacks;
-  }
-  function destroyCallbacksCollection(node) {
-      set(node, domDataKey, undefined);
-  }
-
-  function cleanSingleNode(node) {
-      // Run all the dispose callbacks
-      var callbacks = getDisposeCallbacksCollection(node, false);
-      if (callbacks) {
-          callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
-          for (var i = 0; i < callbacks.length; i++)
-              callbacks[i](node);
-      }
-
-      // Erase the DOM data
-      clear(node);
-
-      // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)
-      cleanExternalData(node);
-
-      // Clear any immediate-child comment nodes, as these wouldn't have been found by
-      // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
-      if (cleanableNodeTypesWithDescendants[node.nodeType])
-          cleanImmediateCommentTypeChildren(node);
-  }
-
-  function cleanImmediateCommentTypeChildren(nodeWithChildren) {
-      var child, nextChild = nodeWithChildren.firstChild;
-      while (child = nextChild) {
-          nextChild = child.nextSibling;
-          if (child.nodeType === 8)
-              cleanSingleNode(child);
-      }
-  }
-
-  // Exports
-  function addDisposeCallback(node, callback) {
-      if (typeof callback != "function")
-          throw new Error("Callback must be a function");
-      getDisposeCallbacksCollection(node, true).push(callback);
-  }
-
-  function removeDisposeCallback(node, callback) {
-      var callbacksCollection = getDisposeCallbacksCollection(node, false);
-      if (callbacksCollection) {
-          arrayRemoveItem(callbacksCollection, callback);
-          if (callbacksCollection.length == 0)
-              destroyCallbacksCollection(node);
-      }
-  }
-
-  function cleanNode(node) {
-      // First clean this node, where applicable
-      if (cleanableNodeTypes[node.nodeType]) {
-          cleanSingleNode(node);
-
-          // ... then its descendants, where applicable
-          if (cleanableNodeTypesWithDescendants[node.nodeType]) {
-              // Clone the descendants list in case it changes during iteration
-              var descendants = [];
-              arrayPushAll(descendants, node.getElementsByTagName("*"));
-              for (var i = 0, j = descendants.length; i < j; i++)
-                  cleanSingleNode(descendants[i]);
-          }
-      }
-      return node;
-  }
-
-  function removeNode(node) {
-      cleanNode(node);
-      if (node.parentNode)
-          node.parentNode.removeChild(node);
-  }
-
-  function cleanExternalData (node) {
-      // Special support for jQuery here because it's so commonly used.
-      // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
-      // so notify it to tear down any resources associated with the node & descendants here.
-
-      var jQueryCleanNodeFn = jQueryInstance
-          ? jQueryInstance.cleanData : null;
-
-      if (jQueryCleanNodeFn) {
-          jQueryCleanNodeFn([node]);
-      }
-  }
-
-  var knownEvents = {};
-  var knownEventTypesByEventName = {};
-  var keyEventTypeName = (navigator && /Firefox\/2/i.test(navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';
-
-  knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
-
-  knownEvents['MouseEvents'] = [
-      'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',
-      'mouseout', 'mouseenter', 'mouseleave'];
-
-
-  objectForEach(knownEvents, function(eventType, knownEventsForType) {
-      if (knownEventsForType.length) {
-          for (var i = 0, j = knownEventsForType.length; i < j; i++)
-              knownEventTypesByEventName[knownEventsForType[i]] = eventType;
-      }
-  });
-
-  function fixUpContinuousNodeArray(continuousNodeArray, parentNode) {
-      // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile
-      // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that
-      // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
-      // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
-      // So, this function translates the old "map" output array into its best guess of the set of current DOM nodes.
-      //
-      // Rules:
-      //   [A] Any leading nodes that have been removed should be ignored
-      //       These most likely correspond to memoization nodes that were already removed during binding
-      //       See https://github.com/knockout/knockout/pull/440
-      //   [B] Any trailing nodes that have been remove should be ignored
-      //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]
-      //       See https://github.com/knockout/knockout/pull/1903
-      //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,
-      //       and include any nodes that have been inserted among the previous collection
-
-      if (continuousNodeArray.length) {
-          // The parent node can be a virtual element; so get the real parent node
-          parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;
-
-          // Rule [A]
-          while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)
-              continuousNodeArray.splice(0, 1);
-
-          // Rule [B]
-          while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)
-              continuousNodeArray.length--;
-
-          // Rule [C]
-          if (continuousNodeArray.length > 1) {
-              var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];
-              // Replace with the actual new continuous node set
-              continuousNodeArray.length = 0;
-              while (current !== last) {
-                  continuousNodeArray.push(current);
-                  current = current.nextSibling;
-              }
-              continuousNodeArray.push(last);
-          }
-      }
-      return continuousNodeArray;
-  }
-
-  var commentNodesHaveTextProperty = document && document.createComment("test").text === "<!--test-->";
-
-  var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
-  var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
-  var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
-
-  function isStartComment(node) {
-      return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-  }
-
-  function isEndComment(node) {
-      return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-  }
-
-  function getVirtualChildren(startComment, allowUnbalanced) {
-      var currentNode = startComment;
-      var depth = 1;
-      var children = [];
-      while (currentNode = currentNode.nextSibling) {
-          if (isEndComment(currentNode)) {
-              depth--;
-              if (depth === 0)
-                  return children;
-          }
-
-          children.push(currentNode);
-
-          if (isStartComment(currentNode))
-              depth++;
-      }
-      if (!allowUnbalanced)
-          throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
-      return null;
-  }
-
-  function getMatchingEndComment(startComment, allowUnbalanced) {
-      var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
-      if (allVirtualChildren) {
-          if (allVirtualChildren.length > 0)
-              return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
-          return startComment.nextSibling;
-      } else
-          return null; // Must have no matching end comment, and allowUnbalanced is true
-  }
-
-  function getUnbalancedChildTags(node) {
-      // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
-      //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
-      var childNode = node.firstChild, captureRemaining = null;
-      if (childNode) {
-          do {
-              if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
-                  captureRemaining.push(childNode);
-              else if (isStartComment(childNode)) {
-                  var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
-                  if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
-                      childNode = matchingEndComment;
-                  else
-                      captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
-              } else if (isEndComment(childNode)) {
-                  captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
-              }
-          } while (childNode = childNode.nextSibling);
-      }
-      return captureRemaining;
-  }
-
-  var allowedBindings = {};
-  function childNodes(node) {
-      return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
-  }
-
-  function emptyNode(node) {
-      if (!isStartComment(node))
-          emptyDomNode(node);
-      else {
-          var virtualChildren = childNodes(node);
-          for (var i = 0, j = virtualChildren.length; i < j; i++)
-              removeNode(virtualChildren[i]);
-      }
-  }
-
-  function setDomNodeChildren(node, childNodes) {
-      if (!isStartComment(node))
-          setRegularDomNodeChildren(node, childNodes);
-      else {
-          emptyNode(node);
-          var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
-          for (var i = 0, j = childNodes.length; i < j; i++)
-              endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
-      }
-  }
-
-  function prepend(containerNode, nodeToPrepend) {
-      if (!isStartComment(containerNode)) {
-          if (containerNode.firstChild)
-              containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
-          else
-              containerNode.appendChild(nodeToPrepend);
-      } else {
-          // Start comments must always have a parent and at least one following sibling (the end comment)
-          containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
-      }
-  }
-
-  function insertAfter(containerNode, nodeToInsert, insertAfterNode) {
-      if (!insertAfterNode) {
-          prepend(containerNode, nodeToInsert);
-      } else if (!isStartComment(containerNode)) {
-          // Insert after insertion point
-          if (insertAfterNode.nextSibling)
-              containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-          else
-              containerNode.appendChild(nodeToInsert);
-      } else {
-          // Children of start comments must always have a parent and at least one following sibling (the end comment)
-          containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-      }
-  }
-
-  function firstChild(node) {
-      if (!isStartComment(node))
-          return node.firstChild;
-      if (!node.nextSibling || isEndComment(node.nextSibling))
-          return null;
-      return node.nextSibling;
-  }
-
-  function nextSibling(node) {
-      if (isStartComment(node))
-          node = getMatchingEndComment(node);
-      if (node.nextSibling && isEndComment(node.nextSibling))
-          return null;
-      return node.nextSibling;
-  }
-
-  function normaliseVirtualElementDomStructure(elementVerified) {
-      // Workaround for https://github.com/SteveSanderson/knockout/issues/155
-      // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
-      // that are direct descendants of <ul> into the preceding <li>)
-      if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])
-          return;
-
-      // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
-      // must be intended to appear *after* that child, so move them there.
-      var childNode = elementVerified.firstChild;
-      if (childNode) {
-          do {
-              if (childNode.nodeType === 1) {
-                  var unbalancedTags = getUnbalancedChildTags(childNode);
-                  if (unbalancedTags) {
-                      // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
-                      var nodeToInsertBefore = childNode.nextSibling;
-                      for (var i = 0; i < unbalancedTags.length; i++) {
-                          if (nodeToInsertBefore)
-                              elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
-                          else
-                              elementVerified.appendChild(unbalancedTags[i]);
-                      }
-                  }
-              }
-          } while (childNode = childNode.nextSibling);
-      }
-  }
-
-  function moveCleanedNodesToContainerElement(nodes) {
-      // Ensure it's a real array, as we're about to reparent the nodes and
-      // we don't want the underlying collection to change while we're doing that.
-      var nodesArray = makeArray(nodes);
-      var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;
-
-      var container = templateDocument.createElement('div');
-      for (var i = 0, j = nodesArray.length; i < j; i++) {
-          container.appendChild(cleanNode(nodesArray[i]));
-      }
-      return container;
-  }
-
-  function setRegularDomNodeChildren (domNode, childNodes) {
-      emptyDomNode(domNode);
-      if (childNodes) {
-          for (var i = 0, j = childNodes.length; i < j; i++)
-              domNode.appendChild(childNodes[i]);
-      }
-  }
-
-  function replaceDomNodes (nodeToReplaceOrNodeArray, newNodesArray) {
-      var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
-      if (nodesToReplaceArray.length > 0) {
-          var insertionPoint = nodesToReplaceArray[0];
-          var parent = insertionPoint.parentNode;
-          for (var i = 0, j = newNodesArray.length; i < j; i++)
-              parent.insertBefore(newNodesArray[i], insertionPoint);
-          for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {
-              removeNode(nodesToReplaceArray[i]);
-          }
-      }
-  }
-
-  function emptyDomNode (domNode) {
-      while (domNode.firstChild) {
-          removeNode(domNode.firstChild);
-      }
-  }
-
-  var none = [0, "", ""];
-  var table = [1, "<table>", "</table>"];
-  var tbody = [2, "<table><tbody>", "</tbody></table>"];
-  var colgroup = [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>"];
-  var tr = [3, "<table><tbody><tr>", "</tr></tbody></table>"];
-  var select = [1, "<select multiple='multiple'>", "</select>"];
-  var fieldset = [1, "<fieldset>", "</fieldset>"];
-  var map = [1, "<map>", "</map>"];
-  var object = [1, "<object>", "</object>"];
-  var lookup = {
-          'area': map,
-          'col': colgroup,
-          'colgroup': table,
-          'caption': table,
-          'legend': fieldset,
-          'thead': table,
-          'tbody': table,
-          'tfoot': table,
-          'tr': tbody,
-          'td': tr,
-          'th': tr,
-          'option': select,
-          'optgroup': select,
-          'param': object
-      };
-  var supportsTemplateTag = 'content' in document.createElement('template');
-  function getWrap(tags) {
-      var m = tags.match(/^<([a-z]+)[ >]/);
-      return (m && lookup[m[1]]) || none;
-  }
-
-
-  function simpleHtmlParse(html, documentContext) {
-      documentContext || (documentContext = document);
-      var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;
-
-      // Based on jQuery's "clean" function, but only accounting for table-related elements.
-      // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
-
-      // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
-      // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
-      // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
-      // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
-
-      // Trim whitespace, otherwise indexOf won't work as expected
-      var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement("div"),
-          wrap = getWrap(tags),
-          depth = wrap[0];
-
-      // Go to html and back, then peel off extra wrappers
-      // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
-      var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
-      if (typeof windowContext['innerShiv'] == "function") {
-          // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding
-          // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv
-          // somehow shims the native APIs so it just works anyway)
-          div.appendChild(windowContext['innerShiv'](markup));
-      } else {
-          div.innerHTML = markup;
-      }
-
-      // Move to the right depth
-      while (depth--)
-          div = div.lastChild;
-
-      return makeArray(div.lastChild.childNodes);
-  }
-
-
-  function templateHtmlParse(html, documentContext) {
-      if (!documentContext) { documentContext = document; }
-      var template = documentContext.createElement('template');
-      template.innerHTML = html;
-      return makeArray(template.content.childNodes);
-  }
-
-
-  function jQueryHtmlParse(html, documentContext) {
-      // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
-      if (jQueryInstance.parseHTML) {
-          return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null
-      } else {
-          // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
-          var elems = jQueryInstance.clean([html], documentContext);
-
-          // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
-          // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
-          // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
-          if (elems && elems[0]) {
-              // Find the top-most parent element that's a direct child of a document fragment
-              var elem = elems[0];
-              while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
-                  elem = elem.parentNode;
-              // ... then detach it
-              if (elem.parentNode)
-                  elem.parentNode.removeChild(elem);
-          }
-
-          return elems;
-      }
-  }
-
-
-  function parseHtmlFragment(html, documentContext) {
-      return supportsTemplateTag ? templateHtmlParse(html, documentContext) :
-          // Note jQuery's HTML parsing fails on element names like tr-*.
-          // See: https://github.com/jquery/jquery/pull/1988
-          (jQueryInstance ? jQueryHtmlParse(html, documentContext) :
-          // Benefit from jQuery's on old browsers, where possible
-
-          simpleHtmlParse(html, documentContext));
-          // ... otherwise, this simple logic will do in most common cases.
-  }
-
-
-  function setHtml(node, html) {
-      emptyDomNode(node);
-
-      // There's few cases where we would want to display a stringified
-      // function, so we unwrap it.
-      if (typeof html === 'function') {
-          html = html();
-      }
-
-      if ((html !== null) && (html !== undefined)) {
-          if (typeof html !== 'string')
-              html = html.toString();
-
-          // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
-          // for example <tr> elements which are not normally allowed to exist on their own.
-          // If you've referenced jQuery we'll use that rather than duplicating its code.
-          if (jQueryInstance) {
-              jQueryInstance(node).html(html);
-          } else {
-              // ... otherwise, use KO's own parsing logic.
-              var parsedNodes = parseHtmlFragment(html, node.ownerDocument);
-              for (var i = 0; i < parsedNodes.length; i++)
-                  node.appendChild(parsedNodes[i]);
-          }
-      }
-  }
-
-  var memos = {};
-
-  function randomMax8HexChars() {
-      return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
-  }
-
-  function generateRandomId() {
-      return randomMax8HexChars() + randomMax8HexChars();
-  }
-
-  function findMemoNodes(rootNode, appendToArray) {
-      if (!rootNode)
-          return;
-      if (rootNode.nodeType == 8) {
-          var memoId = parseMemoText(rootNode.nodeValue);
-          if (memoId != null)
-              appendToArray.push({ domNode: rootNode, memoId: memoId });
-      } else if (rootNode.nodeType == 1) {
-          for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
-              findMemoNodes(childNodes[i], appendToArray);
-      }
-  }
-
-
-  function memoize(callback) {
-      if (typeof callback != "function")
-          throw new Error("You can only pass a function to memoization.memoize()");
-      var memoId = generateRandomId();
-      memos[memoId] = callback;
-      return "<!--[ko_memo:" + memoId + "]-->";
-  }
-
-  function unmemoize(memoId, callbackParams) {
-      var callback = memos[memoId];
-      if (callback === undefined)
-          throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
-      try {
-          callback.apply(null, callbackParams || []);
-          return true;
-      }
-      finally { delete memos[memoId]; }
-  }
-
-  function unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {
-      var memos = [];
-      findMemoNodes(domNode, memos);
-      for (var i = 0, j = memos.length; i < j; i++) {
-          var node = memos[i].domNode;
-          var combinedParams = [node];
-          if (extraCallbackParamsArray)
-              arrayPushAll(combinedParams, extraCallbackParamsArray);
-          unmemoize(memos[i].memoId, combinedParams);
-          node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
-          if (node.parentNode)
-              node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
-      }
-  }
-
-  function parseMemoText(memoText) {
-      var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
-      return match ? match[1] : null;
-  }
-
-  var taskQueue = [];
-  var taskQueueLength = 0;
-  var nextHandle = 1;
-  var nextIndexToProcess = 0;
-  if (window.MutationObserver && !(window.navigator && window.navigator.standalone)) {
-      // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+
-      // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT
-      options.taskScheduler = (function (callback) {
-          var div = document.createElement("div");
-          new MutationObserver(callback).observe(div, {attributes: true});
-          return function () { div.classList.toggle("foo"); };
-      })(scheduledProcess);
-  } else if (document && "onreadystatechange" in document.createElement("script")) {
-      // IE 6-10
-      // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT
-      options.taskScheduler = function (callback) {
-          var script = document.createElement("script");
-          script.onreadystatechange = function () {
-              script.onreadystatechange = null;
-              document.documentElement.removeChild(script);
-              script = null;
-              callback();
-          };
-          document.documentElement.appendChild(script);
-      };
-  } else {
-      options.taskScheduler = function (callback) {
-          setTimeout(callback, 0);
-      };
-  }
-
-  function processTasks() {
-      if (taskQueueLength) {
-          // Each mark represents the end of a logical group of tasks and the number of these groups is
-          // limited to prevent unchecked recursion.
-          var mark = taskQueueLength, countMarks = 0;
-
-          // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue
-          for (var task; nextIndexToProcess < taskQueueLength; ) {
-              if (task = taskQueue[nextIndexToProcess++]) {
-                  if (nextIndexToProcess > mark) {
-                      if (++countMarks >= 5000) {
-                          nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion
-                          deferError(Error("'Too much recursion' after processing " + countMarks + " task groups."));
-                          break;
-                      }
-                      mark = taskQueueLength;
-                  }
-                  try {
-                      task();
-                  } catch (ex) {
-                      deferError(ex);
-                  }
-              }
-          }
-      }
-  }
-
-  function scheduledProcess() {
-      processTasks();
-
-      // Reset the queue
-      nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
-  }
-
-  function scheduleTaskProcessing() {
-      options.taskScheduler(scheduledProcess);
-  }
-
-
-  function schedule(func) {
-      if (!taskQueueLength) {
-          scheduleTaskProcessing();
-      }
-
-      taskQueue[taskQueueLength++] = func;
-      return nextHandle++;
-  }
-
-  function cancel(handle) {
-      var index = handle - (nextHandle - taskQueueLength);
-      if (index >= nextIndexToProcess && index < taskQueueLength) {
-          taskQueue[index] = null;
-      }
-  }
-
-  function deferUpdates(target) {
-      if (!target._deferUpdates) {
-          target._deferUpdates = true;
-          target.limit(function (callback) {
-              var handle;
-              return function () {
-                  cancel(handle);
-                  handle = schedule(callback);
-                  target.notifySubscribers(undefined, 'dirty');
-              };
-          });
-      }
-  }
-
-  var primitiveTypes = {
-      'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1
-  };
-
-
-  function valuesArePrimitiveAndEqual(a, b) {
-      var oldValueIsPrimitive = (a === null) || (typeof(a) in primitiveTypes);
-      return oldValueIsPrimitive ? (a === b) : false;
-  }
-
-
-  function applyExtenders(requestedExtenders) {
-      var target = this;
-      if (requestedExtenders) {
-          objectForEach(requestedExtenders, function(key, value) {
-              var extenderHandler = extenders[key];
-              if (typeof extenderHandler == 'function') {
-                  target = extenderHandler(target, value) || target;
-              } else {
-                  options.onError(new Error("Extender not found: " + key));
-              }
-          });
-      }
-      return target;
-  }
-
-  /*
-                  --- DEFAULT EXTENDERS ---
-   */
-
-
-  // Change when notifications are published.
-  function notify(target, notifyWhen) {
-      target.equalityComparer = notifyWhen == "always" ?
-          null :  // null equalityComparer means to always notify
-          valuesArePrimitiveAndEqual;
-  }
-
-
-  function deferred(target, option) {
-      if (option !== true) {
-          throw new Error('The \'deferred\' extender only accepts the value \'true\', because it is not supported to turn deferral off once enabled.');
-      }
-      deferUpdates(target);
-  }
-
-
-  function rateLimit(target, options) {
-      var timeout, method, limitFunction;
-
-      if (typeof options == 'number') {
-          timeout = options;
-      } else {
-          timeout = options.timeout;
-          method = options.method;
-      }
-
-      // rateLimit supersedes deferred updates
-      target._deferUpdates = false;
-
-      limitFunction = method == 'notifyWhenChangesStop' ? debounceFn : throttleFn;
-
-      target.limit(function(callback) {
-          return limitFunction(callback, timeout);
-      });
-  }
-
-
-  var extenders = {
-      notify: notify,
-      deferred: deferred,
-      rateLimit: rateLimit
-  };
-
-  function subscription(target, callback, disposeCallback) {
-      this._target = target;
-      this.callback = callback;
-      this.disposeCallback = disposeCallback;
-      this.isDisposed = false;
-  }
-
-  subscription.prototype.dispose = function () {
-      this.isDisposed = true;
-      this.disposeCallback();
-  };
-
-  function subscribable() {
-      setPrototypeOfOrExtend(this, ko_subscribable_fn);
-      ko_subscribable_fn.init(this);
-  }
-
-  var defaultEvent = "change";
-
-
-  var ko_subscribable_fn = {
-      init: function(instance) {
-          instance._subscriptions = {};
-          instance._versionNumber = 1;
-      },
-
-      subscribe: function (callback, callbackTarget, event) {
-          var self = this;
-
-          event = event || defaultEvent;
-          var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
-
-          var subscriptionInstance = new subscription(self, boundCallback, function () {
-              arrayRemoveItem(self._subscriptions[event], subscriptionInstance);
-              if (self.afterSubscriptionRemove)
-                  self.afterSubscriptionRemove(event);
-          });
-
-          if (self.beforeSubscriptionAdd)
-              self.beforeSubscriptionAdd(event);
-
-          if (!self._subscriptions[event])
-              self._subscriptions[event] = [];
-          self._subscriptions[event].push(subscriptionInstance);
-
-          return subscriptionInstance;
-      },
-
-      notifySubscribers: function (valueToNotify, event) {
-          event = event || defaultEvent;
-          if (event === defaultEvent) {
-              this.updateVersion();
-          }
-          if (this.hasSubscriptionsForEvent(event)) {
-              try {
-                  begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)
-                  for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {
-                      // In case a subscription was disposed during the arrayForEach cycle, check
-                      // for isDisposed on each subscription before invoking its callback
-                      if (!subscriptionInstance.isDisposed)
-                          subscriptionInstance.callback(valueToNotify);
-                  }
-              } finally {
-                  end(); // End suppressing dependency detection
-              }
-          }
-      },
-
-      getVersion: function () {
-          return this._versionNumber;
-      },
-
-      hasChanged: function (versionToCheck) {
-          return this.getVersion() !== versionToCheck;
-      },
-
-      updateVersion: function () {
-          ++this._versionNumber;
-      },
-
-      hasSubscriptionsForEvent: function(event) {
-          return this._subscriptions[event] && this._subscriptions[event].length;
-      },
-
-      getSubscriptionsCount: function (event) {
-          if (event) {
-              return this._subscriptions[event] && this._subscriptions[event].length || 0;
-          } else {
-              var total = 0;
-              objectForEach(this._subscriptions, function(eventName, subscriptions) {
-                  if (eventName !== 'dirty')
-                      total += subscriptions.length;
-              });
-              return total;
-          }
-      },
-
-      isDifferent: function(oldValue, newValue) {
-          return !this.equalityComparer ||
-                 !this.equalityComparer(oldValue, newValue);
-      },
-
-      extend: applyExtenders
-  };
-
-
-  // For browsers that support proto assignment, we overwrite the prototype of each
-  // observable instance. Since observables are functions, we need Function.prototype
-  // to still be in the prototype chain.
-  if (canSetPrototype) {
-      setPrototypeOf(ko_subscribable_fn, Function.prototype);
-  }
-
-  subscribable.fn = ko_subscribable_fn;
-
-
-  function isSubscribable(instance) {
-      return instance != null && typeof instance.subscribe == "function" && typeof instance.notifySubscribers == "function";
-  }
-
-  var outerFrames = [];
-  var currentFrame;
-  var lastId = 0;
-  // Return a unique ID that can be assigned to an observable for dependency tracking.
-  // Theoretically, you could eventually overflow the number storage size, resulting
-  // in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53
-  // or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would
-  // take over 285 years to reach that number.
-  // Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html
-  function getId() {
-      return ++lastId;
-  }
-
-  function begin(options) {
-      outerFrames.push(currentFrame);
-      currentFrame = options;
-  }
-
-  function end() {
-      currentFrame = outerFrames.pop();
-  }
-
-
-  function registerDependency(subscribable) {
-      if (currentFrame) {
-          if (!isSubscribable(subscribable))
-              throw new Error("Only subscribable things can act as dependencies");
-          currentFrame.callback.call(currentFrame.callbackTarget, subscribable, subscribable._id || (subscribable._id = getId()));
-      }
-  }
-
-  function ignore(callback, callbackTarget, callbackArgs) {
-      try {
-          begin();
-          return callback.apply(callbackTarget, callbackArgs || []);
-      } finally {
-          end();
-      }
-  }
-
-  var observableLatestValue = createSymbolOrString('_latestValue');
-
-
-  function observable(initialValue) {
-      function Observable() {
-          if (arguments.length > 0) {
-              // Write
-
-              // Ignore writes if the value hasn't changed
-              if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {
-                  Observable.valueWillMutate();
-                  Observable[observableLatestValue] = arguments[0];
-                  Observable.valueHasMutated();
-              }
-              return this; // Permits chained assignments
-          }
-          else {
-              // Read
-              registerDependency(Observable); // The caller only needs to be notified of changes if they did a "read" operation
-              return Observable[observableLatestValue];
-          }
-      }
-
-      Observable[observableLatestValue] = initialValue;
-
-      // Inherit from 'subscribable'
-      if (!canSetPrototype) {
-          // 'subscribable' won't be on the prototype chain unless we put it there directly
-          extend(Observable, subscribable.fn);
-      }
-      subscribable.fn.init(Observable);
-
-      // Inherit from 'observable'
-      setPrototypeOfOrExtend(Observable, observable.fn);
-
-      if (options.deferUpdates) {
-          deferUpdates(Observable);
-      }
-
-      return Observable;
-  }
-
-  // Define prototype for observables
-  observable.fn = {
-      equalityComparer: valuesArePrimitiveAndEqual,
-      peek: function() { return this[observableLatestValue]; },
-      valueHasMutated: function () { this.notifySubscribers(this[observableLatestValue]); },
-      valueWillMutate: function () {
-          this.notifySubscribers(this[observableLatestValue], 'beforeChange');
-      }
-  };
-
-
-
-  // Moved out of "limit" to avoid the extra closure
-  function limitNotifySubscribers(value, event) {
-      if (!event || event === defaultEvent) {
-          this._limitChange(value);
-      } else if (event === 'beforeChange') {
-          this._limitBeforeChange(value);
-      } else {
-          this._origNotifySubscribers(value, event);
-      }
-  }
-
-  // Add `limit` function to the subscribable prototype
-  subscribable.fn.limit = function limit(limitFunction) {
-      var self = this, selfIsObservable = isObservable(self),
-          ignoreBeforeChange, previousValue, pendingValue, beforeChange = 'beforeChange';
-
-      if (!self._origNotifySubscribers) {
-          self._origNotifySubscribers = self.notifySubscribers;
-          self.notifySubscribers = limitNotifySubscribers;
-      }
-
-      var finish = limitFunction(function() {
-          self._notificationIsPending = false;
-
-          // If an observable provided a reference to itself, access it to get the latest value.
-          // This allows computed observables to delay calculating their value until needed.
-          if (selfIsObservable && pendingValue === self) {
-              pendingValue = self();
-          }
-          ignoreBeforeChange = false;
-          if (self.isDifferent(previousValue, pendingValue)) {
-              self._origNotifySubscribers(previousValue = pendingValue);
-          }
-      });
-
-      self._limitChange = function(value) {
-          self._notificationIsPending = ignoreBeforeChange = true;
-          pendingValue = value;
-          finish();
-      };
-      self._limitBeforeChange = function(value) {
-          if (!ignoreBeforeChange) {
-              previousValue = value;
-              self._origNotifySubscribers(value, beforeChange);
-          }
-      };
-  };
-
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the observable constructor
-  if (canSetPrototype) {
-      setPrototypeOf(observable.fn, subscribable.fn);
-  }
-
-  var protoProperty = observable.protoProperty = options.protoProperty;
-  observable.fn[protoProperty] = observable;
-
-  function isObservable(instance) {
-      return hasPrototype(instance, observable);
-  }
-
-  function unwrap(value) {
-      return isObservable(value) ? value() : value;
-  }
-
-  function peek(value) {
-      return isObservable(value) ? value.peek() : value;
-  }
-
-  var arrayChangeEventName = 'arrayChange';
-
-
-  function trackArrayChanges(target, options) {
-      // Use the provided options--each call to trackArrayChanges overwrites the previously set options
-      target.compareArrayOptions = {};
-      if (options && typeof options == "object") {
-          extend(target.compareArrayOptions, options);
-      }
-      target.compareArrayOptions.sparse = true;
-
-      // Only modify the target observable once
-      if (target.cacheDiffForKnownOperation) {
-          return;
-      }
-      var trackingChanges = false,
-          cachedDiff = null,
-          arrayChangeSubscription,
-          pendingNotifications = 0,
-          underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,
-          underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;
-
-      // Watch "subscribe" calls, and for array change events, ensure change tracking is enabled
-      target.beforeSubscriptionAdd = function (event) {
-          if (underlyingBeforeSubscriptionAddFunction)
-              underlyingBeforeSubscriptionAddFunction.call(target, event);
-          if (event === arrayChangeEventName) {
-              trackChanges();
-          }
-      };
-
-      // Watch "dispose" calls, and for array change events, ensure change tracking is disabled when all are disposed
-      target.afterSubscriptionRemove = function (event) {
-          if (underlyingAfterSubscriptionRemoveFunction)
-              underlyingAfterSubscriptionRemoveFunction.call(target, event);
-          if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {
-              arrayChangeSubscription.dispose();
-              trackingChanges = false;
-          }
-      };
-
-      function trackChanges() {
-          // Calling 'trackChanges' multiple times is the same as calling it once
-          if (trackingChanges) {
-              return;
-          }
-
-          trackingChanges = true;
-
-          // Intercept "notifySubscribers" to track how many times it was called.
-          var underlyingNotifySubscribersFunction = target['notifySubscribers'];
-          target['notifySubscribers'] = function(valueToNotify, event) {
-              if (!event || event === defaultEvent) {
-                  ++pendingNotifications;
-              }
-              return underlyingNotifySubscribersFunction.apply(this, arguments);
-          };
-
-          // Each time the array changes value, capture a clone so that on the next
-          // change it's possible to produce a diff
-          var previousContents = [].concat(target.peek() || []);
-          cachedDiff = null;
-          arrayChangeSubscription = target.subscribe(function(currentContents) {
-              // Make a copy of the current contents and ensure it's an array
-              currentContents = [].concat(currentContents || []);
-
-              // Compute the diff and issue notifications, but only if someone is listening
-              if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {
-                  var changes = getChanges(previousContents, currentContents);
-              }
-
-              // Eliminate references to the old, removed items, so they can be GCed
-              previousContents = currentContents;
-              cachedDiff = null;
-              pendingNotifications = 0;
-
-              if (changes && changes.length) {
-                  target['notifySubscribers'](changes, arrayChangeEventName);
-              }
-          });
-      }
-
-      function getChanges(previousContents, currentContents) {
-          // We try to re-use cached diffs.
-          // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates
-          // plugin, which without this check would not be compatible with arrayChange notifications. Normally,
-          // notifications are issued immediately so we wouldn't be queueing up more than one.
-          if (!cachedDiff || pendingNotifications > 1) {
-              cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);
-          }
-
-          return cachedDiff;
-      }
-
-      target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {
-          var index, argsIndex;
-          // Only run if we're currently tracking changes for this observable array
-          // and there aren't any pending deferred notifications.
-          if (!trackingChanges || pendingNotifications) {
-              return;
-          }
-          var diff = [],
-              arrayLength = rawArray.length,
-              argsLength = args.length,
-              offset = 0;
-
-          function pushDiff(status, value, index) {
-              return diff[diff.length] = { 'status': status, 'value': value, 'index': index };
-          }
-          switch (operationName) {
-          case 'push':
-              offset = arrayLength;
-          case 'unshift':
-              for (index = 0; index < argsLength; index++) {
-                  pushDiff('added', args[index], offset + index);
-              }
-              break;
-
-          case 'pop':
-              offset = arrayLength - 1;
-          case 'shift':
-              if (arrayLength) {
-                  pushDiff('deleted', rawArray[offset], offset);
-              }
-              break;
-
-          case 'splice':
-              // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].
-              // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
-              var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),
-                  endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),
-                  endAddIndex = startIndex + argsLength - 2,
-                  endIndex = Math.max(endDeleteIndex, endAddIndex),
-                  additions = [], deletions = [];
-              for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {
-                  if (index < endDeleteIndex)
-                      deletions.push(pushDiff('deleted', rawArray[index], index));
-                  if (index < endAddIndex)
-                      additions.push(pushDiff('added', args[argsIndex], index));
-              }
-              findMovesInArrayComparison(deletions, additions);
-              break;
-
-          default:
-              return;
-          }
-          cachedDiff = diff;
-      };
-  }
-
-
-  // Expose compareArrays for testing.
-  trackArrayChanges.compareArrays = compareArrays;
-
-
-  // Add the trackArrayChanges extender so we can use
-  // obs.extend({ trackArrayChanges: true })
-  extenders.trackArrayChanges = trackArrayChanges;
-
-  function observableArray(initialValues) {
-      initialValues = initialValues || [];
-
-      if (typeof initialValues != 'object' || !('length' in initialValues))
-          throw new Error("The argument passed when initializing an observable array must be an array, or null, or undefined.");
-
-      var result = observable(initialValues);
-      setPrototypeOfOrExtend(result, observableArray.fn);
-      trackArrayChanges(result);
-          // ^== result.extend({ trackArrayChanges: true })
-      return result;
-  }
-
-  observableArray.fn = {
-      remove: function (valueOrPredicate) {
-          var underlyingArray = this.peek();
-          var removedValues = [];
-          var predicate = typeof valueOrPredicate == "function" && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-          for (var i = 0; i < underlyingArray.length; i++) {
-              var value = underlyingArray[i];
-              if (predicate(value)) {
-                  if (removedValues.length === 0) {
-                      this.valueWillMutate();
-                  }
-                  removedValues.push(value);
-                  underlyingArray.splice(i, 1);
-                  i--;
-              }
-          }
-          if (removedValues.length) {
-              this.valueHasMutated();
-          }
-          return removedValues;
-      },
-
-      removeAll: function (arrayOfValues) {
-          // If you passed zero args, we remove everything
-          if (arrayOfValues === undefined) {
-              var underlyingArray = this.peek();
-              var allValues = underlyingArray.slice(0);
-              this.valueWillMutate();
-              underlyingArray.splice(0, underlyingArray.length);
-              this.valueHasMutated();
-              return allValues;
-          }
-          // If you passed an arg, we interpret it as an array of entries to remove
-          if (!arrayOfValues)
-              return [];
-          return this['remove'](function (value) {
-              return arrayIndexOf(arrayOfValues, value) >= 0;
-          });
-      },
-
-      destroy: function (valueOrPredicate) {
-          var underlyingArray = this.peek();
-          var predicate = typeof valueOrPredicate == "function" && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
-          this.valueWillMutate();
-          for (var i = underlyingArray.length - 1; i >= 0; i--) {
-              var value = underlyingArray[i];
-              if (predicate(value))
-                  underlyingArray[i]["_destroy"] = true;
-          }
-          this.valueHasMutated();
-      },
-
-      destroyAll: function (arrayOfValues) {
-          // If you passed zero args, we destroy everything
-          if (arrayOfValues === undefined)
-              return this.destroy(function() { return true; });
-
-          // If you passed an arg, we interpret it as an array of entries to destroy
-          if (!arrayOfValues)
-              return [];
-          return this.destroy(function (value) {
-              return arrayIndexOf(arrayOfValues, value) >= 0;
-          });
-      },
-
-      indexOf: function (item) {
-          var underlyingArray = this();
-          return arrayIndexOf(underlyingArray, item);
-      },
-
-      replace: function(oldItem, newItem) {
-          var index = this.indexOf(oldItem);
-          if (index >= 0) {
-              this.valueWillMutate();
-              this.peek()[index] = newItem;
-              this.valueHasMutated();
-          }
-      }
-  };
-
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the ko.observableArray constructor
-  if (canSetPrototype) {
-      setPrototypeOf(observableArray.fn, observable.fn);
-  }
-
-  // Populate ko.observableArray.fn with read/write functions from native arrays
-  // Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
-  // because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
-  arrayForEach(["pop", "push", "reverse", "shift", "sort", "splice", "unshift"], function (methodName) {
-      observableArray.fn[methodName] = function () {
-          // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
-          // (for consistency with mutating regular observables)
-          var underlyingArray = this.peek();
-          this.valueWillMutate();
-          this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);
-          var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
-          this.valueHasMutated();
-          // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.
-          return methodCallResult === underlyingArray ? this : methodCallResult;
-      };
-  });
-
-  // Populate ko.observableArray.fn with read-only functions from native arrays
-  arrayForEach(["slice"], function (methodName) {
-      observableArray.fn[methodName] = function () {
-          var underlyingArray = this();
-          return underlyingArray[methodName].apply(underlyingArray, arguments);
-      };
-  });
-
-  var templateScript = 1;
-  var templateTextArea = 2;
-  var templateTemplate = 3;
-  var templateElement = 4;
-  function domElement(element) {
-      this.domElement = element;
-
-      if (!element) { return; }
-      var tagNameLower$$ = tagNameLower(element);
-      this.templateType =
-          tagNameLower$$ === "script" ? templateScript :
-          tagNameLower$$ === "textarea" ? templateTextArea :
-              // For browsers with proper <template> element support, where the .content property gives a document fragment
-          tagNameLower$$ == "template" && element.content && element.content.nodeType === 11 ? templateTemplate :
-          templateElement;
-  }
-
-  domElement.prototype.text = function(/* valueToWrite */) {
-      var elemContentsProperty = this.templateType === templateScript ? "text"
-                               : this.templateType === templateTextArea ? "value"
-                               : "innerHTML";
-
-      if (arguments.length == 0) {
-          return this.domElement[elemContentsProperty];
-      } else {
-          var valueToWrite = arguments[0];
-          if (elemContentsProperty === "innerHTML")
-              setHtml(this.domElement, valueToWrite);
-          else
-              this.domElement[elemContentsProperty] = valueToWrite;
-      }
-  };
-
-  var dataDomDataPrefix = nextKey() + "_";
-  domElement.prototype.data = function(key /*, valueToWrite */) {
-      if (arguments.length === 1) {
-          return get(this.domElement, dataDomDataPrefix + key);
-      } else {
-          set(this.domElement, dataDomDataPrefix + key, arguments[1]);
-      }
-  };
-
-  var templatesDomDataKey = nextKey();
-  function getTemplateDomData(element) {
-      return get(element, templatesDomDataKey) || {};
-  }
-  function setTemplateDomData(element, data) {
-      set(element, templatesDomDataKey, data);
-  }
-
-  domElement.prototype.nodes = function(/* valueToWrite */) {
-      var element = this.domElement;
-      if (arguments.length == 0) {
-          var templateData = getTemplateDomData(element),
-              containerData = templateData.containerData;
-          return containerData || (
-              this.templateType === templateTemplate ? element.content :
-              this.templateType === templateElement ? element :
-              undefined);
-      } else {
-          var valueToWrite = arguments[0];
-          setTemplateDomData(element, {containerData: valueToWrite});
-      }
-  };
-
-  // ---- ko.templateSources.anonymousTemplate -----
-  // Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
-  // For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
-  // Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
-
-  function anonymousTemplate(element) {
-      this.domElement = element;
-  }
-
-  anonymousTemplate.prototype = new domElement();
-  anonymousTemplate.prototype.constructor = anonymousTemplate;
-  anonymousTemplate.prototype.text = function(/* valueToWrite */) {
-      if (arguments.length == 0) {
-          var templateData = getTemplateDomData(this.domElement);
-          if (templateData.textData === undefined && templateData.containerData)
-              templateData.textData = templateData.containerData.innerHTML;
-          return templateData.textData;
-      } else {
-          var valueToWrite = arguments[0];
-          setTemplateDomData(this.domElement, {textData: valueToWrite});
-      }
-  };
-
-  function templateEngine() { };
-
-  extend(templateEngine.prototype, {
-    renderTemplateSource: function (templateSource, bindingContext, options, templateDocument) {
-        options.onError("Override renderTemplateSource");
-    },
-
-    createJavaScriptEvaluatorBlock: function (script) {
-        options.onError("Override createJavaScriptEvaluatorBlock");
-    },
-
-    makeTemplateSource: function(template, templateDocument) {
-        // Named template
-        if (typeof template == "string") {
-            templateDocument = templateDocument || document;
-            var elem = templateDocument.getElementById(template);
-            if (!elem)
-                options.onError("Cannot find template with ID " + template);
-            return new domElement(elem);
-        } else if ((template.nodeType == 1) || (template.nodeType == 8)) {
-            // Anonymous template
-            return new anonymousTemplate(template);
-        } else
-            options.onError("Unknown template type: " + template);
-    },
-
-    renderTemplate: function (template, bindingContext, options, templateDocument) {
-        var templateSource = this['makeTemplateSource'](template, templateDocument);
-        return this.renderTemplateSource(templateSource, bindingContext, options, templateDocument);
-    }
-  })
-
-  var computedState = createSymbolOrString('_state');
-
-  function computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$) {
-      if (typeof evaluatorFunctionOrOptions === "object") {
-          // Single-parameter syntax - everything is on this "options" param
-          options$$ = evaluatorFunctionOrOptions;
-      } else {
-          // Multi-parameter syntax - construct the options according to the params passed
-          options$$ = options$$ || {};
-          if (evaluatorFunctionOrOptions) {
-              options$$.read = evaluatorFunctionOrOptions;
-          }
-      }
-      if (typeof options$$.read != "function")
-          throw Error("Pass a function that returns the value of the computed");
-
-      var writeFunction = options$$.write;
-      var state = {
-          latestValue: undefined,
-          isStale: true,
-          isBeingEvaluated: false,
-          suppressDisposalUntilDisposeWhenReturnsFalse: false,
-          isDisposed: false,
-          pure: false,
-          isSleeping: false,
-          readFunction: options$$.read,
-          evaluatorFunctionTarget: evaluatorFunctionTarget || options$$.owner,
-          disposeWhenNodeIsRemoved: options$$.disposeWhenNodeIsRemoved || options$$.disposeWhenNodeIsRemoved || null,
-          disposeWhen: options$$.disposeWhen || options$$.disposeWhen,
-          domNodeDisposalCallback: null,
-          dependencyTracking: {},
-          dependenciesCount: 0,
-          evaluationTimeoutInstance: null
-      };
-
-      function computedObservable() {
-          if (arguments.length > 0) {
-              if (typeof writeFunction === "function") {
-                  // Writing a value
-                  writeFunction.apply(state.evaluatorFunctionTarget, arguments);
-              } else {
-                  throw new Error("Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.");
-              }
-              return this; // Permits chained assignments
-          } else {
-              // Reading the value
-              registerDependency(computedObservable);
-              if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {
-                  computedObservable.evaluateImmediate();
-              }
-              return state.latestValue;
-          }
-      }
-
-      computedObservable[computedState] = state;
-      computedObservable.hasWriteFunction = typeof writeFunction === "function";
-
-      // Inherit from 'subscribable'
-      if (!canSetPrototype) {
-          // 'subscribable' won't be on the prototype chain unless we put it there directly
-          extend(computedObservable, subscribable.fn);
-      }
-      subscribable.fn.init(computedObservable);
-
-      // Inherit from 'computed'
-      setPrototypeOfOrExtend(computedObservable, computed.fn);
-
-      if (options$$.pure) {
-          state.pure = true;
-          state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription
-          extend(computedObservable, pureComputedOverrides);
-      } else if (options$$.deferEvaluation) {
-          extend(computedObservable, deferEvaluationOverrides);
-      }
-
-      if (options.deferUpdates) {
-          extenders.deferred(computedObservable, true);
-      }
-
-      if (options.debug) {
-          // #1731 - Aid debugging by exposing the computed's options
-          computedObservable._options = options$$;
-      }
-
-      if (state.disposeWhenNodeIsRemoved) {
-          // Since this computed is associated with a DOM node, and we don't want to dispose the computed
-          // until the DOM node is *removed* from the document (as opposed to never having been in the document),
-          // we'll prevent disposal until "disposeWhen" first returns false.
-          state.suppressDisposalUntilDisposeWhenReturnsFalse = true;
-
-          // disposeWhenNodeIsRemoved: true can be used to opt into the "only dispose after first false result"
-          // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try
-          // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't
-          // be documented or used by application code, as it's likely to change in a future version of KO.
-          if (!state.disposeWhenNodeIsRemoved.nodeType) {
-              state.disposeWhenNodeIsRemoved = null;
-          }
-      }
-
-      // Evaluate, unless sleeping or deferEvaluation is true
-      if (!state.isSleeping && !options$$.deferEvaluation) {
-          computedObservable.evaluateImmediate();
-      }
-
-      // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is
-      // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).
-      if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {
-          addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {
-              computedObservable.dispose();
-          });
-      }
-
-      return computedObservable;
-  }
-
-  // Utility function that disposes a given dependencyTracking entry
-  function computedDisposeDependencyCallback(id, entryToDispose) {
-      if (entryToDispose !== null && entryToDispose.dispose) {
-          entryToDispose.dispose();
-      }
-  }
-
-  // This function gets called each time a dependency is detected while evaluating a computed.
-  // It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.
-  function computedBeginDependencyDetectionCallback(subscribable, id) {
-      var computedObservable = this.computedObservable,
-          state = computedObservable[computedState];
-      if (!state.isDisposed) {
-          if (this.disposalCount && this.disposalCandidates[id]) {
-              // Don't want to dispose this subscription, as it's still being used
-              computedObservable.addDependencyTracking(id, subscribable, this.disposalCandidates[id]);
-              this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway
-              --this.disposalCount;
-          } else if (!state.dependencyTracking[id]) {
-              // Brand new subscription - add it
-              computedObservable.addDependencyTracking(id, subscribable, state.isSleeping ? { _target: subscribable } : computedObservable.subscribeToDependency(subscribable));
-          }
-      }
-  }
-
-  computed.fn = {
-      equalityComparer: valuesArePrimitiveAndEqual,
-      getDependenciesCount: function () {
-          return this[computedState].dependenciesCount;
-      },
-      addDependencyTracking: function (id, target, trackingObj) {
-          if (this[computedState].pure && target === this) {
-              throw Error("A 'pure' computed must not be called recursively");
-          }
-
-          this[computedState].dependencyTracking[id] = trackingObj;
-          trackingObj._order = this[computedState].dependenciesCount++;
-          trackingObj._version = target.getVersion();
-      },
-      haveDependenciesChanged: function () {
-          var id, dependency, dependencyTracking = this[computedState].dependencyTracking;
-          for (id in dependencyTracking) {
-              if (dependencyTracking.hasOwnProperty(id)) {
-                  dependency = dependencyTracking[id];
-                  if (dependency._target.hasChanged(dependency._version)) {
-                      return true;
-                  }
-              }
-          }
-      },
-      markDirty: function () {
-          // Process "dirty" events if we can handle delayed notifications
-          if (this._evalDelayed && !this[computedState].isBeingEvaluated) {
-              this._evalDelayed();
-          }
-      },
-      isActive: function () {
-          return this[computedState].isStale || this[computedState].dependenciesCount > 0;
-      },
-      respondToChange: function () {
-          // Ignore "change" events if we've already scheduled a delayed notification
-          if (!this._notificationIsPending) {
-              this.evaluatePossiblyAsync();
-          }
-      },
-      subscribeToDependency: function (target) {
-          if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {
-              var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),
-                  changeSub = target.subscribe(this.respondToChange, this);
-              return {
-                  _target: target,
-                  dispose: function () {
-                      dirtySub.dispose();
-                      changeSub.dispose();
-                  }
-              };
-          } else {
-              return target.subscribe(this.evaluatePossiblyAsync, this);
-          }
-      },
-      evaluatePossiblyAsync: function () {
-          var computedObservable = this,
-              throttleEvaluationTimeout = computedObservable.throttleEvaluation;
-          if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
-              clearTimeout(this[computedState].evaluationTimeoutInstance);
-              this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {
-                  computedObservable.evaluateImmediate(true /*notifyChange*/);
-              }, throttleEvaluationTimeout);
-          } else if (computedObservable._evalDelayed) {
-              computedObservable._evalDelayed();
-          } else {
-              computedObservable.evaluateImmediate(true /*notifyChange*/);
-          }
-      },
-      evaluateImmediate: function (notifyChange) {
-          var computedObservable = this,
-              state = computedObservable[computedState],
-              disposeWhen = state.disposeWhen;
-
-          if (state.isBeingEvaluated) {
-              // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
-              // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
-              // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
-              // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
-              return;
-          }
-
-          // Do not evaluate (and possibly capture new dependencies) if disposed
-          if (state.isDisposed) {
-              return;
-          }
-
-          if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {
-              // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse
-              if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {
-                  computedObservable.dispose();
-                  return;
-              }
-          } else {
-              // It just did return false, so we can stop suppressing now
-              state.suppressDisposalUntilDisposeWhenReturnsFalse = false;
-          }
-
-          state.isBeingEvaluated = true;
-          try {
-              this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);
-          } finally {
-              state.isBeingEvaluated = false;
-          }
-
-          if (!state.dependenciesCount) {
-              computedObservable.dispose();
-          }
-      },
-      evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {
-          // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.
-          // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,
-          // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).
-
-          var computedObservable = this,
-              state = computedObservable[computedState];
-
-          // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
-          // Then, during evaluation, we cross off any that are in fact still being used.
-          var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time
-              dependencyDetectionContext = {
-                  computedObservable: computedObservable,
-                  disposalCandidates: state.dependencyTracking,
-                  disposalCount: state.dependenciesCount
-              };
-
-          begin({
-              callbackTarget: dependencyDetectionContext,
-              callback: computedBeginDependencyDetectionCallback,
-              computed: computedObservable,
-              isInitial: isInitial
-          });
-
-          state.dependencyTracking = {};
-          state.dependenciesCount = 0;
-
-          var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);
-
-          if (computedObservable.isDifferent(state.latestValue, newValue)) {
-              if (!state.isSleeping) {
-                  computedObservable.notifySubscribers(state.latestValue, "beforeChange");
-              }
-
-              state.latestValue = newValue;
-
-              if (state.isSleeping) {
-                  computedObservable.updateVersion();
-              } else if (notifyChange) {
-                  computedObservable.notifySubscribers(state.latestValue);
-              }
-          }
-
-          if (isInitial) {
-              computedObservable.notifySubscribers(state.latestValue, "awake");
-          }
-      },
-      evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {
-          // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.
-          // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection
-          // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU
-          // overhead of computed evaluation (on V8 at least).
-
-          try {
-              var readFunction = state.readFunction;
-              return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();
-          } finally {
-              end();
-
-              // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
-              if (dependencyDetectionContext.disposalCount && !state.isSleeping) {
-                  objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);
-              }
-
-              state.isStale = false;
-          }
-      },
-      peek: function () {
-          // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when "deferEvaluation" is set.
-          var state = this[computedState];
-          if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {
-              this.evaluateImmediate();
-          }
-          return state.latestValue;
-      },
-      limit: function (limitFunction) {
-          // Override the limit function with one that delays evaluation as well
-          subscribable.fn.limit.call(this, limitFunction);
-          this._evalDelayed = function () {
-              this._limitBeforeChange(this[computedState].latestValue);
-
-              this[computedState].isStale = true; // Mark as dirty
-
-              // Pass the observable to the "limit" code, which will access it when
-              // it's time to do the notification.
-              this._limitChange(this);
-          };
-      },
-      dispose: function () {
-          var state = this[computedState];
-          if (!state.isSleeping && state.dependencyTracking) {
-              objectForEach(state.dependencyTracking, function (id, dependency) {
-                  if (dependency.dispose)
-                      dependency.dispose();
-              });
-          }
-          if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {
-              removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);
-          }
-          state.dependencyTracking = null;
-          state.dependenciesCount = 0;
-          state.isDisposed = true;
-          state.isStale = false;
-          state.isSleeping = false;
-          state.disposeWhenNodeIsRemoved = null;
-          state.readFunction = null;
-          if (options.debug) {
-              this._options = null;
-          }
-      }
-  };
-
-  var pureComputedOverrides = {
-      beforeSubscriptionAdd: function (event) {
-          // If asleep, wake up the computed by subscribing to any dependencies.
-          var computedObservable = this,
-              state = computedObservable[computedState];
-          if (!state.isDisposed && state.isSleeping && event == 'change') {
-              state.isSleeping = false;
-              if (state.isStale || computedObservable.haveDependenciesChanged()) {
-                  state.dependencyTracking = null;
-                  state.dependenciesCount = 0;
-                  state.isStale = true;
-                  computedObservable.evaluateImmediate();
-              } else {
-                  // First put the dependencies in order
-                  var dependeciesOrder = [];
-                  objectForEach(state.dependencyTracking, function (id, dependency) {
-                      dependeciesOrder[dependency._order] = id;
-                  });
-                  // Next, subscribe to each one
-                  arrayForEach(dependeciesOrder, function (id, order) {
-                      var dependency = state.dependencyTracking[id],
-                          subscription = computedObservable.subscribeToDependency(dependency._target);
-                      subscription._order = order;
-                      subscription._version = dependency._version;
-                      state.dependencyTracking[id] = subscription;
-                  });
-              }
-              if (!state.isDisposed) {     // test since evaluating could trigger disposal
-                  computedObservable.notifySubscribers(state.latestValue, "awake");
-              }
-          }
-      },
-      afterSubscriptionRemove: function (event) {
-          var state = this[computedState];
-          if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {
-              objectForEach(state.dependencyTracking, function (id, dependency) {
-                  if (dependency.dispose) {
-                      state.dependencyTracking[id] = {
-                          _target: dependency._target,
-                          _order: dependency._order,
-                          _version: dependency._version
-                      };
-                      dependency.dispose();
-                  }
-              });
-              state.isSleeping = true;
-              this.notifySubscribers(undefined, "asleep");
-          }
-      },
-      getVersion: function () {
-          // Because a pure computed is not automatically updated while it is sleeping, we can't
-          // simply return the version number. Instead, we check if any of the dependencies have
-          // changed and conditionally re-evaluate the computed observable.
-          var state = this[computedState];
-          if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {
-              this.evaluateImmediate();
-          }
-          return subscribable.fn.getVersion.call(this);
-      }
-  };
-
-  var deferEvaluationOverrides = {
-      beforeSubscriptionAdd: function (event) {
-          // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.
-          if (event == 'change' || event == 'beforeChange') {
-              this.peek();
-          }
-      }
-  };
-
-  // Note that for browsers that don't support proto assignment, the
-  // inheritance chain is created manually in the ko.computed constructor
-  if (canSetPrototype) {
-      setPrototypeOf(computed.fn, subscribable.fn);
-  }
-
-  // Set the proto chain values for ko.hasPrototype
-  var protoProp = observable.protoProperty; // == "__ko_proto__"
-  computed[protoProp] = observable;
-  computed.fn[protoProp] = computed;
-
-  function throttleExtender(target, timeout) {
-      // Throttling means two things:
-
-      // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
-      //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
-      target.throttleEvaluation = timeout;
-
-      // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
-      //     so the target cannot change value synchronously or faster than a certain rate
-      var writeTimeoutInstance = null;
-      return computed({
-          read: target,
-          write: function(value) {
-              clearTimeout(writeTimeoutInstance);
-              writeTimeoutInstance = setTimeout(function() {
-                  target(value);
-              }, timeout);
-          }
-      });
-  }
-
-
-  extenders.throttle = throttleExtender;
-
-  var storedBindingContextDomDataKey = nextKey();
-
-
-
-  // The bindingContext constructor is only called directly to create the root context. For child
-  // contexts, use bindingContext.createChildContext or bindingContext.extend.
-  function bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {
-
-      var self = this,
-          isFunc = typeof(dataItemOrAccessor) == "function" && !isObservable(dataItemOrAccessor),
-          nodes,
-          subscribable;
-
-      // The binding context object includes static properties for the current, parent, and root view models.
-      // If a view model is actually stored in an observable, the corresponding binding context object, and
-      // any child contexts, must be updated when the view model is changed.
-      function updateContext() {
-          // Most of the time, the context will directly get a view model object, but if a function is given,
-          // we call the function to retrieve the view model. If the function accesses any observables or returns
-          // an observable, the dependency is tracked, and those observables can later cause the binding
-          // context to be updated.
-          var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor,
-              dataItem = unwrap(dataItemOrObservable);
-
-          if (parentContext) {
-              // When a "parent" context is given, register a dependency on the parent context. Thus whenever the
-              // parent context is updated, this context will also be updated.
-              if (parentContext._subscribable)
-                  parentContext._subscribable();
-
-              // Copy $root and any custom properties from the parent context
-              extend(self, parentContext);
-
-              // Because the above copy overwrites our own properties, we need to reset them.
-              self._subscribable = subscribable;
-          } else {
-              self.$parents = [];
-              self.$root = dataItem;
-
-              // Export 'ko' in the binding context so it will be available in bindings and templates
-              // even if 'ko' isn't exported as a global, such as when using an AMD loader.
-              // See https://github.com/SteveSanderson/knockout/issues/490
-              self.ko = options.knockoutInstance;
-          }
-          self.$rawData = dataItemOrObservable;
-          self.$data = dataItem;
-          if (dataItemAlias)
-              self[dataItemAlias] = dataItem;
-
-          // The extendCallback function is provided when creating a child context or extending a context.
-          // It handles the specific actions needed to finish setting up the binding context. Actions in this
-          // function could also add dependencies to this binding context.
-          if (extendCallback)
-              extendCallback(self, parentContext, dataItem);
-
-          return self.$data;
-      }
-
-      function disposeWhen() {
-          return nodes && !anyDomNodeIsAttachedToDocument(nodes);
-      }
-
-      if (settings && settings.exportDependencies) {
-          // The "exportDependencies" option means that the calling code will track any dependencies and re-create
-          // the binding context when they change.
-          updateContext();
-          return;
-      }
-
-      subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });
-
-      // At this point, the binding context has been initialized, and the "subscribable" computed observable is
-      // subscribed to any observables that were accessed in the process. If there is nothing to track, the
-      // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in
-      // the context object.
-      if (subscribable.isActive()) {
-          self._subscribable = subscribable;
-
-          // Always notify because even if the model ($data) hasn't changed, other context properties might have changed
-          subscribable.equalityComparer = null;
-
-          // We need to be able to dispose of this computed observable when it's no longer needed. This would be
-          // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and
-          // we cannot assume that those nodes have any relation to each other. So instead we track any node that
-          // the context is attached to, and dispose the computed when all of those nodes have been cleaned.
-
-          // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates
-          nodes = [];
-          subscribable._addNode = function(node) {
-              nodes.push(node);
-              addDisposeCallback(node, function(node) {
-                  arrayRemoveItem(nodes, node);
-                  if (!nodes.length) {
-                      subscribable.dispose();
-                      self._subscribable = subscribable = undefined;
-                  }
-              });
-          };
-      }
-  }
-
-  // Extend the binding context hierarchy with a new view model object. If the parent context is watching
-  // any observables, the new child context will automatically get a dependency on the parent context.
-  // But this does not mean that the $data value of the child context will also get updated. If the child
-  // view model also depends on the parent view model, you must provide a function that returns the correct
-  // view model on each update.
-  bindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {
-      return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function(self, parentContext) {
-          // Extend the context hierarchy by setting the appropriate pointers
-          self.$parentContext = parentContext;
-          self.$parent = parentContext.$data;
-          self.$parents = (parentContext.$parents || []).slice(0);
-          self.$parents.unshift(self.$parent);
-          if (extendCallback)
-              extendCallback(self);
-      }, settings);
-  };
-
-  // Extend the binding context with new custom properties. This doesn't change the context hierarchy.
-  // Similarly to "child" contexts, provide a function here to make sure that the correct values are set
-  // when an observable view model is updated.
-  bindingContext.prototype.extend = function(properties) {
-      // If the parent context references an observable view model, "_subscribable" will always be the
-      // latest view model object. If not, "_subscribable" isn't set, and we can use the static "$data" value.
-      return new bindingContext(this._subscribable || this.$data, this, null, function(self, parentContext) {
-          // This "child" context doesn't directly track a parent observable view model,
-          // so we need to manually set the $rawData value to match the parent.
-          self.$rawData = parentContext.$rawData;
-          extend(self, typeof(properties) === "function" ? properties() : properties);
-      });
-  };
-
-  bindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {
-      return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { "exportDependencies": true });
-  };
-
-
-  function storedBindingContextForNode(node, bindingContext) {
-      if (arguments.length == 2) {
-          set(node, storedBindingContextDomDataKey, bindingContext);
-          if (bindingContext._subscribable)
-              bindingContext._subscribable._addNode(node);
-      } else {
-          return get(node, storedBindingContextDomDataKey);
-      }
-  }
-
-  // The following element types will not be recursed into during binding.
-  var bindingDoesNotRecurseIntoElementTypes = {
-      // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,
-      // because it's unexpected and a potential XSS issue.
-      // Also bindings should not operate on <template> elements since this breaks in Internet Explorer
-      // and because such elements' contents are always intended to be bound in a different context
-      // from where they appear in the document.
-      'script': true,
-      'textarea': true,
-      'template': true
-  };
-
-  // Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers
-  function getBindingHandler(bindingKey) {
-      return options.bindingProviderInstance.bindingHandlers.get(bindingKey);
-  }
-
-
-  // Returns the value of a valueAccessor function
-  function evaluateValueAccessor(valueAccessor) {
-      return valueAccessor();
-  }
-
-  // Given a function that returns bindings, create and return a new object that contains
-  // binding value-accessors functions. Each accessor function calls the original function
-  // so that it always gets the latest value and all dependencies are captured. This is used
-  // by ko.applyBindingsToNode and getBindingsAndMakeAccessors.
-  function makeAccessorsFromFunction(callback) {
-      return objectMap(ignore(callback), function(value, key) {
-          return function() {
-              return callback()[key];
-          };
-      });
-  }
-
-  // This function is used if the binding provider doesn't include a getBindingAccessors function.
-  // It must be called with 'this' set to the provider instance.
-  function getBindingsAndMakeAccessors(node, context) {
-      return makeAccessorsFromFunction(this.getBindings.bind(this, node, context));
-  }
-
-  function validateThatBindingIsAllowedForVirtualElements(bindingName) {
-      var bindingHandler = options.bindingProviderInstance.bindingHandlers[bindingName],
-          validator;
-      if (typeof bindingHandler === 'function') {
-          validator = bindingHandler.allowVirtualElements || (
-              typeof bindingHandler.prototype === 'object' &&
-              Boolean(bindingHandler.prototype.allowVirtualElements)
-          );
-      } else {
-          validator = bindingHandler.allowVirtualElements || allowedBindings[bindingName];
-      }
-      if (!validator)
-          throw new Error("The binding '" + bindingName + "' cannot be used with virtual elements");
-  }
-
-  function applyBindingsToDescendantsInternal (bindingContext, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement) {
-      var currentChild,
-          nextInQueue = firstChild(elementOrVirtualElement),
-          provider = options.bindingProviderInstance,
-          preprocessNode = provider.preprocessNode;
-
-      // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's
-      // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to
-      // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that
-      // trigger insertion of <template> contents at that point in the document.
-      if (preprocessNode) {
-          while (currentChild = nextInQueue) {
-              nextInQueue = nextSibling(currentChild);
-              preprocessNode.call(provider, currentChild);
-          }
-          // Reset nextInQueue for the next loop
-          nextInQueue = firstChild(elementOrVirtualElement);
-      }
-
-      while (currentChild = nextInQueue) {
-          // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
-          nextInQueue = nextSibling(currentChild);
-          applyBindingsToNodeAndDescendantsInternal(bindingContext, currentChild, bindingContextsMayDifferFromDomParentElement);
-      }
-  }
-
-  function applyBindingsToNodeAndDescendantsInternal (bindingContext, nodeVerified, bindingContextMayDifferFromDomParentElement) {
-      var shouldBindDescendants = true;
-
-      // Perf optimisation: Apply bindings only if...
-      // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
-      //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
-      // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
-      var isElement = (nodeVerified.nodeType === 1);
-      if (isElement) // Workaround IE <= 8 HTML parsing weirdness
-          normaliseVirtualElementDomStructure(nodeVerified);
-
-      var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement)             // Case (1)
-                             || options.bindingProviderInstance.nodeHasBindings(nodeVerified);       // Case (2)
-      if (shouldApplyBindings)
-          shouldBindDescendants = applyBindingsToNodeInternal(nodeVerified, null, bindingContext, bindingContextMayDifferFromDomParentElement).shouldBindDescendants;
-
-      if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {
-          // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
-          //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
-          //    hence bindingContextsMayDifferFromDomParentElement is false
-          //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
-          //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
-          //    hence bindingContextsMayDifferFromDomParentElement is true
-          applyBindingsToDescendantsInternal(bindingContext, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement);
-      }
-  }
-
-  var boundElementDomDataKey = nextKey();
-
-
-  function topologicalSortBindings(bindings) {
-      // Depth-first sort
-      var result = [],                // The list of key/handler pairs that we will return
-          bindingsConsidered = {},    // A temporary record of which bindings are already in 'result'
-          cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it
-      objectForEach(bindings, function pushBinding(bindingKey) {
-          if (!bindingsConsidered[bindingKey]) {
-              var binding = getBindingHandler(bindingKey);
-              if (binding) {
-                  // First add dependencies (if any) of the current binding
-                  if (binding.after) {
-                      cyclicDependencyStack.push(bindingKey);
-                      arrayForEach(binding.after, function(bindingDependencyKey) {
-                          if (bindings[bindingDependencyKey]) {
-                              if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {
-                                  throw Error("Cannot combine the following bindings, because they have a cyclic dependency: " + cyclicDependencyStack.join(", "));
-                              } else {
-                                  pushBinding(bindingDependencyKey);
-                              }
-                          }
-                      });
-                      cyclicDependencyStack.length--;
-                  }
-                  // Next add the current binding
-                  result.push({ key: bindingKey, handler: binding });
-              }
-              bindingsConsidered[bindingKey] = true;
-          }
-      });
-
-      return result;
-  }
-
-  // This is called when the bindingHandler is an object (with `init` and/or
-  // `update` methods)
-  function execObjectBindingHandlerOnNode(bindingKeyAndHandler, node, getValueAccessor, allBindings, bindingContext, reportBindingError) {
-      var handlerInitFn = bindingKeyAndHandler.handler["init"],
-          handlerUpdateFn = bindingKeyAndHandler.handler["update"],
-          bindingKey = bindingKeyAndHandler.key,
-          controlsDescendantBindings = false;
-
-      // Run init, ignoring any dependencies
-      if (typeof handlerInitFn === "function") {
-          try {
-              ignore(function() {
-                  var initResult = handlerInitFn(node, getValueAccessor(bindingKey), allBindings, bindingContext.$data, bindingContext);
-
-                  // If this binding handler claims to control descendant bindings, make a note of this
-                  if (initResult && initResult.controlsDescendantBindings) {
-                      controlsDescendantBindings = true;
-                  }
-              });
-          } catch(ex) {
-              reportBindingError('init', ex);
-          }
-      }
-
-      // Run update in its own computed wrapper
-      if (typeof handlerUpdateFn === "function") {
-          computed(
-              function() {
-                  try {
-                      handlerUpdateFn(node, getValueAccessor(bindingKey), allBindings, bindingContext.$data, bindingContext);
-                  } catch (ex) {
-                      reportBindingError('update', ex);
-                  }
-              },
-              null,
-              { disposeWhenNodeIsRemoved: node }
-          );
-      }
-      return controlsDescendantBindings;
-  }
-
-  // This is called when the bindingHandler is a function (or ES6 class).
-  // Node that these will work only for browsers with Object.defineProperty,
-  // i.e. IE9+.
-  function execNewBindingHandlerOnNode(bindingKeyAndHandler, node, getValueAccessor, allBindings, bindingContext, reportBindingError) {
-      var bindingKey = bindingKeyAndHandler.key,
-          handlerParams = {
-              element: node,
-              $data: bindingContext.$data,
-              $context: bindingContext,
-              allBindings: allBindings
-          },
-          handlerConstructor = bindingKeyAndHandler.handler,
-          handlerInstance,
-          subscriptions = [];
-
-      Object.defineProperty(handlerParams, 'value', {
-          get: function () { return getValueAccessor(bindingKey)(); }
-      });
-
-      function handlerConstructorWrapper() {
-          handlerInstance = this;
-
-          // The handler instance will have properties `computed` and
-          // `subscribe`, which are almost the same as the `ko.-` equivalent
-          // except their lifecycle is limited to that of the node (i.e.
-          // they are automatically disposed).
-          this.computed = function handlerInstanceComputed(functionOrObject) {
-              var settings = typeof functionOrObject === 'function' ?
-                  { read: functionOrObject, write: functionOrObject } :
-                  functionOrObject;
-              extend(settings, {
-                  owner: handlerInstance,
-                  disposeWhenNodeIsRemoved: node
-              });
-              return computed(settings);
-          };
-
-          this.subscribe = function handlerInstanceSubscription(subscribable, callback, eventType) {
-              subscriptions.push(
-                  subscribable.subscribe(callback, handlerInstance, eventType)
-              );
-          };
-
-          handlerConstructor.call(this, handlerParams);
-      }
-
-      // We have to wrap the handler instance in this "subclass" because
-      // it's the only way to define this.computed/subscribe before the
-      // handlerConstructor is called, and one would expect those
-      // utilities to be available in the constructor.
-      extend(handlerConstructorWrapper, handlerConstructor);
-      handlerConstructorWrapper.prototype = handlerConstructor.prototype;
-
-      try {
-          new handlerConstructorWrapper();
-      } catch(ex) {
-          reportBindingError('construction', ex);
-      }
-
-      addDisposeCallback(node, function () {
-          if (typeof handlerInstance.dispose === "function") {
-              handlerInstance.dispose.call(handlerInstance);
-          }
-          arrayForEach(subscriptions, function (subs) {
-              subs.dispose();
-          });
-      });
-
-      return handlerConstructor.controlsDescendantBindings || handlerInstance.controlsDescendantBindings;
-  }
-
-  function applyBindingsToNodeInternal(node, sourceBindings, bindingContext, bindingContextMayDifferFromDomParentElement) {
-
-      // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated
-      function allBindings() {
-          return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);
-      }
-      // The following is the 3.x allBindings API
-      allBindings.get = function(key) {
-          return bindings[key] && evaluateValueAccessor(getValueAccessor(key));
-      };
-      allBindings.has = function(key) {
-          return key in bindings;
-      };
-
-      // Prevent multiple applyBindings calls for the same node, except when a binding value is specified
-      var alreadyBound = get(node, boundElementDomDataKey);
-      if (!sourceBindings) {
-          if (alreadyBound) {
-              onBindingError({
-                  during: 'apply',
-                  errorCaptured: new Error("You cannot apply bindings multiple times to the same element."),
-                  element: node,
-                  bindingContext: bindingContext
-              });
-              return false;
-          }
-          set(node, boundElementDomDataKey, true);
-      }
-
-      // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
-      // we can easily recover it just by scanning up the node's ancestors in the DOM
-      // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
-      if (!alreadyBound && bindingContextMayDifferFromDomParentElement)
-          storedBindingContextForNode(node, bindingContext);
-
-      // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings
-      var bindings;
-      if (sourceBindings && typeof sourceBindings !== 'function') {
-          bindings = sourceBindings;
-      } else {
-          var provider = options.bindingProviderInstance,
-              getBindings = provider.getBindingAccessors || getBindingsAndMakeAccessors;
-
-          // Get the binding from the provider within a computed observable so that we can update the bindings whenever
-          // the binding context is updated or if the binding provider accesses observables.
-          var bindingsUpdater = computed(
-              function() {
-                  bindings = sourceBindings ? sourceBindings(bindingContext, node) : getBindings.call(provider, node, bindingContext);
-                  // Register a dependency on the binding context to support observable view models.
-                  if (bindings && bindingContext._subscribable)
-                      bindingContext._subscribable();
-                  return bindings;
-              },
-              null, { disposeWhenNodeIsRemoved: node }
-          );
-
-          if (!bindings || !bindingsUpdater.isActive())
-              bindingsUpdater = null;
-      }
-
-      var bindingHandlerThatControlsDescendantBindings;
-      if (bindings) {
-          // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding
-          // context update), just return the value accessor from the binding. Otherwise, return a function that always gets
-          // the latest binding value and registers a dependency on the binding updater.
-          var getValueAccessor = bindingsUpdater
-              ? function (bindingKey) {
-                  return function(optionalValue) {
-                      var valueAccessor = bindingsUpdater()[bindingKey];
-                      if (arguments.length === 0) {
-                          return evaluateValueAccessor(valueAccessor);
-                      } else {
-                          return valueAccessor(optionalValue);
-                      }
-                  };
-              } : function (bindingKey) { return bindings[bindingKey]; };
-
-          // First put the bindings into the right order
-          var orderedBindings = topologicalSortBindings(bindings);
-
-          // Go through the sorted bindings, calling init and update for each
-          arrayForEach(orderedBindings, function(bindingKeyAndHandler) {
-              var bindingKey = bindingKeyAndHandler.key,
-                  controlsDescendantBindings,
-                  execBindingFunction = typeof bindingKeyAndHandler.handler === 'function' ?
-                      execNewBindingHandlerOnNode :
-                      execObjectBindingHandlerOnNode;
-
-              if (node.nodeType === 8) {
-                  validateThatBindingIsAllowedForVirtualElements(bindingKey);
-              }
-
-              function reportBindingError(during, errorCaptured) {
-                  onBindingError({
-                      during: during,
-                      errorCaptured: errorCaptured,
-                      element: node,
-                      bindingKey: bindingKey,
-                      bindings: bindings,
-                      allBindings: allBindings,
-                      valueAccessor: getValueAccessor(bindingKey),
-                      bindingContext: bindingContext
-                  });
-              }
-
-              // Note that topologicalSortBindings has already filtered out any nonexistent binding handlers,
-              // so bindingKeyAndHandler.handler will always be nonnull.
-              controlsDescendantBindings = execBindingFunction(
-                  bindingKeyAndHandler, node, getValueAccessor,
-                  allBindings, bindingContext, reportBindingError);
-
-              if (controlsDescendantBindings) {
-                  if (bindingHandlerThatControlsDescendantBindings !== undefined)
-                      throw new Error("Multiple bindings (" + bindingHandlerThatControlsDescendantBindings + " and " + bindingKey + ") are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.");
-                  bindingHandlerThatControlsDescendantBindings = bindingKey;
-              }
-          });
-      }
-
-      return {
-          'shouldBindDescendants': bindingHandlerThatControlsDescendantBindings === undefined
-      };
-  }
-
-
-  function getBindingContext(viewModelOrBindingContext) {
-      return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)
-          ? viewModelOrBindingContext
-          : new bindingContext(viewModelOrBindingContext);
-  }
-
-  function applyBindings(viewModelOrBindingContext, rootNode) {
-      // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.
-      if (!options.jQuery === undefined && window.jQuery) {
-          options.jQuery = window.jQuery;
-      }
-
-      if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8))
-          throw new Error("ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node");
-      rootNode = rootNode || window.document.body; // Make "rootNode" parameter optional
-
-      applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true);
-  }
-
-  function onBindingError(spec) {
-      var error, bindingText;
-      if (spec.bindingKey) {
-          // During: 'init' or initial 'update'
-          error = spec.errorCaptured;
-          bindingText = options.bindingProviderInstance.getBindingsString(spec.element);
-          error.message = "Unable to process binding \"" + spec.bindingKey
-              + "\" in binding \"" + bindingText
-              + "\"\nMessage: " + error.message;
-      } else {
-          // During: 'apply'
-          error = spec.errorCaptured;
-      }
-      extend(error, spec);
-      options.onError(error);
-  }
-
-  // Objective:
-  // * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
-  //   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
-  // * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
-  //   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
-  //   previously mapped - retain those nodes, and just insert/delete other ones
-
-  // "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
-  // You can use this, for example, to activate bindings on those nodes.
-
-  function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
-      // Map this array value inside a dependentObservable so we re-map when any dependency changes
-      var mappedNodes = [];
-      var dependentObservable = computed(function() {
-          var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];
-
-          // On subsequent evaluations, just replace the previously-inserted DOM nodes
-          if (mappedNodes.length > 0) {
-              replaceDomNodes(mappedNodes, newMappedNodes);
-              if (callbackAfterAddingNodes)
-                  ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
-          }
-
-          // Replace the contents of the mappedNodes array, thereby updating the record
-          // of which nodes would be deleted if valueToMap was itself later removed
-          mappedNodes.length = 0;
-          arrayPushAll(mappedNodes, newMappedNodes);
-      }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });
-      return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
-  }
-
-  var lastMappingResultDomDataKey = nextKey();
-  var deletedItemDummyValue = nextKey();
-  function setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options, callbackAfterAddingNodes) {
-      // Compare the provided array against the previous one
-      array = array || [];
-      options = options || {};
-      var isFirstExecution = get(domNode, lastMappingResultDomDataKey) === undefined;
-      var lastMappingResult = get(domNode, lastMappingResultDomDataKey) || [];
-      var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
-      var editScript = compareArrays(lastArray, array, options['dontLimitMoves']);
-
-      // Build the new mapping result
-      var newMappingResult = [];
-      var lastMappingResultIndex = 0;
-      var newMappingResultIndex = 0;
-
-      var nodesToDelete = [];
-      var itemsToProcess = [];
-      var itemsForBeforeRemoveCallbacks = [];
-      var itemsForMoveCallbacks = [];
-      var itemsForAfterAddCallbacks = [];
-      var mapData;
-
-      function itemMovedOrRetained(editScriptIndex, oldPosition) {
-          mapData = lastMappingResult[oldPosition];
-          if (newMappingResultIndex !== oldPosition)
-              itemsForMoveCallbacks[editScriptIndex] = mapData;
-          // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray
-          mapData.indexObservable(newMappingResultIndex++);
-          fixUpContinuousNodeArray(mapData.mappedNodes, domNode);
-          newMappingResult.push(mapData);
-          itemsToProcess.push(mapData);
-      }
-
-      function callCallback(callback, items) {
-          if (callback) {
-              for (var i = 0, n = items.length; i < n; i++) {
-                  if (items[i]) {
-                      arrayForEach(items[i].mappedNodes, function(node) {
-                          callback(node, i, items[i].arrayEntry);
-                      });
-                  }
-              }
-          }
-      }
-
-      for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
-          movedIndex = editScriptItem['moved'];
-          switch (editScriptItem['status']) {
-          case "deleted":
-              if (movedIndex === undefined) {
-                  mapData = lastMappingResult[lastMappingResultIndex];
-
-                  // Stop tracking changes to the mapping for these nodes
-                  if (mapData.dependentObservable) {
-                      mapData.dependentObservable.dispose();
-                      mapData.dependentObservable = undefined;
-                  }
-
-                  // Queue these nodes for later removal
-                  if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {
-                      if (options['beforeRemove']) {
-                          newMappingResult.push(mapData);
-                          itemsToProcess.push(mapData);
-                          if (mapData.arrayEntry === deletedItemDummyValue) {
-                              mapData = null;
-                          } else {
-                              itemsForBeforeRemoveCallbacks[i] = mapData;
-                          }
-                      }
-                      if (mapData) {
-                          nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);
-                      }
-                  }
-              }
-              lastMappingResultIndex++;
-              break;
-
-          case "retained":
-              itemMovedOrRetained(i, lastMappingResultIndex++);
-              break;
-
-          case "added":
-              if (movedIndex !== undefined) {
-                  itemMovedOrRetained(i, movedIndex);
-              } else {
-                  mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };
-                  newMappingResult.push(mapData);
-                  itemsToProcess.push(mapData);
-                  if (!isFirstExecution)
-                      itemsForAfterAddCallbacks[i] = mapData;
-              }
-              break;
-          }
-      }
-
-      // Store a copy of the array items we just considered so we can difference it next time
-      set(domNode, lastMappingResultDomDataKey, newMappingResult);
-
-      // Call beforeMove first before any changes have been made to the DOM
-      callCallback(options['beforeMove'], itemsForMoveCallbacks);
-
-      // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
-      arrayForEach(nodesToDelete, options['beforeRemove'] ? cleanNode : removeNode);
-
-      // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
-      i = 0;
-      for (var nextNode = firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
-          // Get nodes for newly added items
-          if (!mapData.mappedNodes)
-              extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
-
-          // Put nodes in the right place if they aren't there already
-          for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
-              if (node !== nextNode)
-                  insertAfter(domNode, node, lastNode);
-          }
-
-          // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
-          if (!mapData.initialized && callbackAfterAddingNodes) {
-              callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
-              mapData.initialized = true;
-          }
-      }
-
-      // If there's a beforeRemove callback, call it after reordering.
-      // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
-      // some sort of animation, which is why we first reorder the nodes that will be removed. If the
-      // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
-      // Perhaps we'll make that change in the future if this scenario becomes more common.
-      callCallback(options['beforeRemove'], itemsForBeforeRemoveCallbacks);
-
-      // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item
-      // as already "removed" so we won't call beforeRemove for it again, and it ensures that the item won't match up
-      // with an actual item in the array and appear as "retained" or "moved".
-      for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {
-          if (itemsForBeforeRemoveCallbacks[i]) {
-              itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;
-          }
-      }
-
-      // Finally call afterMove and afterAdd callbacks
-      callCallback(options['afterMove'], itemsForMoveCallbacks);
-      callCallback(options['afterAdd'], itemsForAfterAddCallbacks);
-  }
-
-  var _templateEngine;
-
-  function setTemplateEngine(tEngine) {
-      if ((tEngine != undefined) && !(tEngine instanceof templateEngine))
-          //TODO: ko.templateEngine to appropriate name
-          throw new Error("templateEngine must inherit from ko.templateEngine");
-      _templateEngine = tEngine;
-  }
-
-  function invokeForEachNodeInContinuousRange(firstNode, lastNode, action) {
-      var node, nextInQueue = firstNode, firstOutOfRangeNode = nextSibling(lastNode);
-      while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
-          nextInQueue = nextSibling(node);
-          action(node, nextInQueue);
-      }
-  }
-
-  function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext) {
-      // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
-      // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
-      // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
-      // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
-      // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
-
-      if (continuousNodeArray.length) {
-          var firstNode = continuousNodeArray[0],
-              lastNode = continuousNodeArray[continuousNodeArray.length - 1],
-              parentNode = firstNode.parentNode,
-              provider = options.bindingProviderInstance,
-              preprocessNode = provider.preprocessNode;
-
-          if (preprocessNode) {
-              invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node, nextNodeInRange) {
-                  var nodePreviousSibling = node.previousSibling;
-                  var newNodes = preprocessNode.call(provider, node);
-                  if (newNodes) {
-                      if (node === firstNode)
-                          firstNode = newNodes[0] || nextNodeInRange;
-                      if (node === lastNode)
-                          lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling;
-                  }
-              });
-
-              // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.
-              // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real
-              // first node needs to be in the array).
-              continuousNodeArray.length = 0;
-              if (!firstNode) { // preprocessNode might have removed all the nodes, in which case there's nothing left to do
-                  return;
-              }
-              if (firstNode === lastNode) {
-                  continuousNodeArray.push(firstNode);
-              } else {
-                  continuousNodeArray.push(firstNode, lastNode);
-                  fixUpContinuousNodeArray(continuousNodeArray, parentNode);
-              }
-          }
-
-          // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
-          // whereas a regular applyBindings won't introduce new memoized nodes
-          invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node) {
-              if (node.nodeType === 1 || node.nodeType === 8)
-                  applyBindings(bindingContext, node);
-          });
-          invokeForEachNodeInContinuousRange(firstNode, lastNode, function(node) {
-              if (node.nodeType === 1 || node.nodeType === 8)
-                  unmemoizeDomNodeAndDescendants(node, [bindingContext]);
-          });
-
-          // Make sure any changes done by applyBindings or unmemoize are reflected in the array
-          fixUpContinuousNodeArray(continuousNodeArray, parentNode);
-      }
-  }
-
-  function getFirstNodeFromPossibleArray(nodeOrNodeArray) {
-      return nodeOrNodeArray.nodeType ? nodeOrNodeArray
-                                      : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
-                                      : null;
-  }
-
-  function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext, options) {
-      options = options || {};
-      var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-      var templateDocument = (firstTargetNode || template || {}).ownerDocument;
-      var templateEngineToUse = (options.templateEngine || _templateEngine);
-      var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext, options, templateDocument);
-
-      // Loosely check result is an array of DOM nodes
-      if ((typeof renderedNodesArray.length != "number") || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType != "number"))
-          throw new Error("Template engine must return an array of DOM nodes");
-
-      var haveAddedNodesToParent = false;
-      switch (renderMode) {
-      case "replaceChildren":
-          setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
-          haveAddedNodesToParent = true;
-          break;
-      case "replaceNode":
-          replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
-          haveAddedNodesToParent = true;
-          break;
-      case "ignoreTargetNode": break;
-      default:
-          throw new Error("Unknown renderMode: " + renderMode);
-      }
-
-      if (haveAddedNodesToParent) {
-          activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext);
-          if (options['afterRender'])
-              ignore(options['afterRender'], null, [renderedNodesArray, bindingContext['$data']]);
-      }
-
-      return renderedNodesArray;
-  }
-
-  function resolveTemplateName(template, data, context) {
-      // The template can be specified as:
-      if (isObservable(template)) {
-          // 1. An observable, with string value
-          return template();
-      } else if (typeof template === 'function') {
-          // 2. A function of (data, context) returning a string
-          return template(data, context);
-      } else {
-          // 3. A string
-          return template;
-      }
-  }
-
-  function renderTemplate(template, dataOrBindingContext, options, targetNodeOrNodeArray, renderMode) {
-      options = options || {};
-      if ((options.templateEngine || _templateEngine) === undefined)
-          throw new Error("Set a template engine before calling renderTemplate");
-      renderMode = renderMode || "replaceChildren";
-
-      if (targetNodeOrNodeArray) {
-          var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-
-          var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)
-          var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode == "replaceNode") ? firstTargetNode.parentNode : firstTargetNode;
-
-          return computed( // So the DOM is automatically updated when any dependency changes
-              function () {
-                  // Ensure we've got a proper binding context to work with
-                  var bindingContext$$ = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))
-                      ? dataOrBindingContext
-                      : new bindingContext(dataOrBindingContext, null, null, null, { "exportDependencies": true });
-
-                  var templateName = resolveTemplateName(template, bindingContext$$['$data'], bindingContext$$),
-                      renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$, options);
-
-                  if (renderMode == "replaceNode") {
-                      targetNodeOrNodeArray = renderedNodesArray;
-                      firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
-                  }
-              },
-              null,
-              { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }
-          );
-      } else {
-          // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node
-          return memoize(function (domNode) {
-              renderTemplate(template, dataOrBindingContext, options, domNode, "replaceNode");
-          });
-      }
-  }
-
-  function renderTemplateForEach(template, arrayOrObservableArray, options, targetNode, parentBindingContext) {
-      // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
-      // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
-      var arrayItemContext;
-
-      // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
-      function executeTemplateForArrayItem(arrayValue, index) {
-          // Support selecting template as a function of the data being rendered
-          arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options['as'], function(context) {
-              context['$index'] = index;
-          });
-
-          var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);
-          return executeTemplate(null, "ignoreTargetNode", templateName, arrayItemContext, options);
-      }
-
-      // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
-      var activateBindingsCallback = function(arrayValue, addedNodesArray /*, index */) {
-          activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext);
-          if (options['afterRender'])
-              options['afterRender'](addedNodesArray, arrayValue);
-
-          // release the "cache" variable, so that it can be collected by
-          // the GC when its value isn't used from within the bindings anymore.
-          arrayItemContext = null;
-      };
-
-      return computed(function () {
-          var unwrappedArray = unwrap(arrayOrObservableArray) || [];
-          if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
-              unwrappedArray = [unwrappedArray];
-
-          // Filter out any entries marked as destroyed
-          var filteredArray = arrayFilter(unwrappedArray, function(item) {
-              return options['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy']);
-          });
-
-          // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
-          // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
-          ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options, activateBindingsCallback]);
-
-      }, null, { disposeWhenNodeIsRemoved: targetNode });
-  }
-
-  var templateComputedDomDataKey = nextKey();
-  function disposeOldComputedAndStoreNewOne(element, newComputed) {
-      var oldComputed = get(element, templateComputedDomDataKey);
-      if (oldComputed && (typeof(oldComputed.dispose) == 'function'))
-          oldComputed.dispose();
-      set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
-  }
-
-  var template = {
-      init: function(element, valueAccessor) {
-          var container;
-          // Support anonymous templates
-          var bindingValue = unwrap(valueAccessor());
-          if (typeof bindingValue == "string" || bindingValue['name']) {
-              // It's a named template - clear the element
-              emptyNode(element);
-          } else if ('nodes' in bindingValue) {
-              // We've been given an array of DOM nodes. Save them as the template source.
-              // There is no known use case for the node array being an observable array (if the output
-              // varies, put that behavior *into* your template - that's what templates are for), and
-              // the implementation would be a mess, so assert that it's not observable.
-              var nodes = bindingValue['nodes'] || [];
-              if (isObservable(nodes)) {
-                  throw new Error('The "nodes" option must be a plain, non-observable array.');
-              }
-              container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent
-              new anonymousTemplate(element)['nodes'](container);
-          } else {
-              // It's an anonymous template - store the element contents, then clear the element
-              var templateNodes = childNodes(element);
-              container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
-              new anonymousTemplate(element).nodes(container);
-          }
-          return { 'controlsDescendantBindings': true };
-      },
-      update: function (element, valueAccessor, allBindings, viewModel, bindingContext) {
-          var value = valueAccessor(),
-              options = unwrap(value),
-              shouldDisplay = true,
-              templateComputed = null,
-              templateName;
-
-          if (typeof options == "string") {
-              templateName = value;
-              options = {};
-          } else {
-              templateName = options['name'];
-
-              // Support "if"/"ifnot" conditions
-              if ('if' in options)
-                  shouldDisplay = unwrap(options['if']);
-              if (shouldDisplay && 'ifnot' in options)
-                  shouldDisplay = !unwrap(options['ifnot']);
-          }
-
-          if ('foreach' in options) {
-              // Render once for each data point (treating data set as empty if shouldDisplay==false)
-              var dataArray = (shouldDisplay && options['foreach']) || [];
-              templateComputed = renderTemplateForEach(templateName || element, dataArray, options, element, bindingContext);
-          } else if (!shouldDisplay) {
-              emptyNode(element);
-          } else {
-              // Render once for this single data point (or use the viewModel if no data was provided)
-              var innerBindingContext = ('data' in options) ?
-                  bindingContext.createStaticChildContext(options['data'], options['as']) :  // Given an explitit 'data' value, we create a child binding context for it
-                  bindingContext;                                                        // Given no explicit 'data' value, we retain the same binding context
-              templateComputed = renderTemplate(templateName || element, innerBindingContext, options, element);
-          }
-
-          // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
-          disposeOldComputedAndStoreNewOne(element, templateComputed);
-      },
-      allowVirtualElements: true
-  };
-
-  function nativeTemplateEngine () {
-  }
-
-  nativeTemplateEngine.prototype = new templateEngine();
-  nativeTemplateEngine.prototype.constructor = nativeTemplateEngine;
-  nativeTemplateEngine.prototype.renderTemplateSource = function(templateSource, bindingContext, options, templateDocument) {
-      var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly
-          templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null,
-          templateNodes = templateNodesFunc ? templateSource.nodes() : null;
-
-      if (templateNodes) {
-          return makeArray(templateNodes.cloneNode(true).childNodes);
-      } else {
-          var templateText = templateSource.text();
-          return parseHtmlFragment(templateText, templateDocument);
-      }
-  };
-
-
-  nativeTemplateEngine.instance = new nativeTemplateEngine();
-  setTemplateEngine(nativeTemplateEngine.instance);
-
-  function makeTemplateValueAccessor(valueAccessor) {
-      return function() {
-          var modelValue = valueAccessor(),
-              unwrappedValue = peek(modelValue);    // Unwrap without setting a dependency here
-
-          // If unwrappedValue is the array, pass in the wrapped value on its own
-          // The value will be unwrapped and tracked within the template binding
-          // (See https://github.com/SteveSanderson/knockout/issues/523)
-          if ((!unwrappedValue) || typeof unwrappedValue.length == "number")
-              return { 'foreach': modelValue, 'templateEngine': nativeTemplateEngine.instance };
-
-          // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
-          unwrap(modelValue);
-          return {
-              'foreach': unwrappedValue['data'],
-              'as': unwrappedValue['as'],
-              'includeDestroyed': unwrappedValue['includeDestroyed'],
-              'afterAdd': unwrappedValue['afterAdd'],
-              'beforeRemove': unwrappedValue['beforeRemove'],
-              'afterRender': unwrappedValue['afterRender'],
-              'beforeMove': unwrappedValue['beforeMove'],
-              'afterMove': unwrappedValue['afterMove'],
-              'templateEngine': nativeTemplateEngine.instance
-          };
-      };
-  }
-
-
-  // "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
-  // "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
-  var foreach = {
-      init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
-          return getBindingHandler('template').init(element, makeTemplateValueAccessor(valueAccessor));
-      },
-      update: function(element, valueAccessor, allBindings, viewModel, bindingContext) {
-          return getBindingHandler('template').update(element, makeTemplateValueAccessor(valueAccessor), allBindings, viewModel, bindingContext);
-      },
-      allowVirtualElements: true,
-      bindingRewriteValidator: false
-  };
-
-  //ko.expressionRewriting.bindingRewriteValidators['foreach'] = false; // Can't rewrite control flow bindings
-
-  //    'let': letBinding,
-  //    template: template,
-
-  var bindings = {
-      foreach: foreach,
-      template: template
-  };
-
-  exports.bindings = bindings;
-  exports.nativeTemplateEngine = nativeTemplateEngine;
-  exports.templateEngine = templateEngine;
-  exports.setTemplateEngine = setTemplateEngine;
-  exports.renderTemplate = renderTemplate;
-  exports.template = template;
-  exports.domElement = domElement;
-  exports.anonymousTemplate = anonymousTemplate;
-
-  Object.defineProperty(exports, '__esModule', { value: true });
-
-}));
\ No newline at end of file
diff --git a/packages/tko.utils/dist/tko.utils.js b/packages/tko.utils/dist/tko.utils.js
deleted file mode 100644
index 1681971e..00000000
--- a/packages/tko.utils/dist/tko.utils.js
+++ /dev/null
@@ -1,1459 +0,0 @@
-(function (global, factory) {
-    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
-    typeof define === 'function' && define.amd ? define(['exports'], factory) :
-    (factory((global.tko = global.tko || {}, global.tko.utils = global.tko.utils || {})));
-}(this, function (exports) { 'use strict';
-
-    //
-    // Array utilities
-    //
-    /* eslint no-cond-assign: 0 */
-
-    function arrayForEach(array, action) {
-        for (var i = 0, j = array.length; i < j; i++)
-            action(array[i], i);
-    }
-
-    function arrayIndexOf(array, item) {
-        // IE9
-        if (typeof Array.prototype.indexOf == "function")
-            return Array.prototype.indexOf.call(array, item);
-        for (var i = 0, j = array.length; i < j; i++)
-            if (array[i] === item)
-                return i;
-        return -1;
-    }
-
-    function arrayFirst(array, predicate, predicateOwner) {
-        for (var i = 0, j = array.length; i < j; i++)
-            if (predicate.call(predicateOwner, array[i], i))
-                return array[i];
-        return null;
-    }
-
-    function arrayRemoveItem(array, itemToRemove) {
-        var index = arrayIndexOf(array, itemToRemove);
-        if (index > 0) {
-            array.splice(index, 1);
-        }
-        else if (index === 0) {
-            array.shift();
-        }
-    }
-
-    function arrayGetDistinctValues(array) {
-        array = array || [];
-        var result = [];
-        for (var i = 0, j = array.length; i < j; i++) {
-            if (arrayIndexOf(result, array[i]) < 0)
-                result.push(array[i]);
-        }
-        return result;
-    }
-
-    function arrayMap(array, mapping) {
-        array = array || [];
-        var result = [];
-        for (var i = 0, j = array.length; i < j; i++)
-            result.push(mapping(array[i], i));
-        return result;
-    }
-
-    function arrayFilter(array, predicate) {
-        array = array || [];
-        var result = [];
-        for (var i = 0, j = array.length; i < j; i++)
-            if (predicate(array[i], i))
-                result.push(array[i]);
-        return result;
-    }
-
-    function arrayPushAll(array, valuesToPush) {
-        if (valuesToPush instanceof Array)
-            array.push.apply(array, valuesToPush);
-        else
-            for (var i = 0, j = valuesToPush.length; i < j; i++)
-                array.push(valuesToPush[i]);
-        return array;
-    }
-
-    function addOrRemoveItem(array, value, included) {
-        var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);
-        if (existingEntryIndex < 0) {
-            if (included)
-                array.push(value);
-        } else {
-            if (!included)
-                array.splice(existingEntryIndex, 1);
-        }
-    }
-
-
-    function makeArray(arrayLikeObject) {
-        var result = [];
-        for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
-            result.push(arrayLikeObject[i]);
-        }
-        return result;
-    }
-
-
-    function range(min, max) {
-        min = typeof min === 'function' ? min() : min;
-        max = typeof max === 'function' ? max() : max;
-        var result = [];
-        for (var i = min; i <= max; i++)
-            result.push(i);
-        return result;
-    }
-
-    // Go through the items that have been added and deleted and try to find matches between them.
-    function findMovesInArrayComparison(left, right, limitFailedCompares) {
-        if (left.length && right.length) {
-            var failedCompares, l, r, leftItem, rightItem;
-            for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
-                for (r = 0; rightItem = right[r]; ++r) {
-                    if (leftItem['value'] === rightItem['value']) {
-                        leftItem['moved'] = rightItem['index'];
-                        rightItem['moved'] = leftItem['index'];
-                        right.splice(r, 1);         // This item is marked as moved; so remove it from right list
-                        failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures
-                        break;
-                    }
-                }
-                failedCompares += r;
-            }
-        }
-    }
-
-
-
-    var statusNotInOld = 'added';
-    var statusNotInNew = 'deleted';
-    // Simple calculation based on Levenshtein distance.
-    function compareArrays(oldArray, newArray, options) {
-        // For backward compatibility, if the third arg is actually a bool, interpret
-        // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
-        options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
-        oldArray = oldArray || [];
-        newArray = newArray || [];
-
-        if (oldArray.length < newArray.length)
-            return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
-        else
-            return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
-    }
-
-
-    function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
-        var myMin = Math.min,
-            myMax = Math.max,
-            editDistanceMatrix = [],
-            smlIndex, smlIndexMax = smlArray.length,
-            bigIndex, bigIndexMax = bigArray.length,
-            compareRange = (bigIndexMax - smlIndexMax) || 1,
-            maxDistance = smlIndexMax + bigIndexMax + 1,
-            thisRow, lastRow,
-            bigIndexMaxForRow, bigIndexMinForRow;
-
-        for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
-            lastRow = thisRow;
-            editDistanceMatrix.push(thisRow = []);
-            bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
-            bigIndexMinForRow = myMax(0, smlIndex - 1);
-            for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
-                if (!bigIndex)
-                    thisRow[bigIndex] = smlIndex + 1;
-                else if (!smlIndex)  // Top row - transform empty array into new array via additions
-                    thisRow[bigIndex] = bigIndex + 1;
-                else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
-                    thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
-                else {
-                    var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
-                    var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
-                    thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
-                }
-            }
-        }
-
-        var editScript = [], meMinusOne, notInSml = [], notInBig = [];
-        for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
-            meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
-            if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
-                notInSml.push(editScript[editScript.length] = {     // added
-                    'status': statusNotInSml,
-                    'value': bigArray[--bigIndex],
-                    'index': bigIndex });
-            } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
-                notInBig.push(editScript[editScript.length] = {     // deleted
-                    'status': statusNotInBig,
-                    'value': smlArray[--smlIndex],
-                    'index': smlIndex });
-            } else {
-                --bigIndex;
-                --smlIndex;
-                if (!options['sparse']) {
-                    editScript.push({
-                        'status': "retained",
-                        'value': bigArray[bigIndex] });
-                }
-            }
-        }
-
-        // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
-        // smlIndexMax keeps the time complexity of this algorithm linear.
-        findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
-
-        return editScript.reverse();
-    }
-
-    //
-    // Error handling
-    //
-    var onError
-
-    function catchFunctionErrors(delegate) {
-        return onError ? function () {
-            try {
-                return delegate.apply(this, arguments);
-            } catch (e) {
-                onError && onError(e);
-                throw e;
-            }
-        } : delegate;
-    }
-
-    function deferError(error) {
-        safeSetTimeout(function () {
-            onError && onError(error);
-            throw error;
-        }, 0);
-    }
-
-
-    function safeSetTimeout(handler, timeout) {
-        return setTimeout(catchFunctionErrors(handler), timeout);
-    }
-
-    //
-    // Detection and Workarounds for Internet Explorer
-    //
-
-    // Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
-    // Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
-    // Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
-    // If there is a future need to detect specific versions of IE10+, we will amend this.
-    var ieVersion = document && (function() {
-        var version = 3, div = document.createElement('div'), iElems = div.getElementsByTagName('i');
-
-        // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
-        while (
-            div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
-            iElems[0]
-        ) {}
-        return version > 4 ? version : undefined;
-    }());
-
-    var isIe6 = ieVersion === 6;
-    var isIe7 = ieVersion === 7;
-
-    //
-    // Object functions
-    //
-
-    function extend(target, source) {
-        if (source) {
-            for(var prop in source) {
-                if(source.hasOwnProperty(prop)) {
-                    target[prop] = source[prop];
-                }
-            }
-        }
-        return target;
-    }
-
-    function objectForEach(obj, action) {
-        for (var prop in obj) {
-            if (obj.hasOwnProperty(prop)) {
-                action(prop, obj[prop]);
-            }
-        }
-    }
-
-
-    function objectMap(source, mapping) {
-        if (!source)
-            return source;
-        var target = {};
-        for (var prop in source) {
-            if (source.hasOwnProperty(prop)) {
-                target[prop] = mapping(source[prop], prop, source);
-            }
-        }
-        return target;
-    }
-
-
-    function getObjectOwnProperty(obj, propName) {
-        return obj.hasOwnProperty(propName) ? obj[propName] : undefined;
-    }
-
-    var canSetPrototype
-
-    function setPrototypeOf(obj, proto) {
-        obj.__proto__ = proto;
-        return obj;
-    }
-
-    var setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend
-
-    function hasPrototype(instance, prototype) {
-        if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
-        if (instance[protoProperty] === prototype) return true;
-        return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
-    }
-
-    //
-    // String (and JSON)
-    //
-
-
-    function stringTrim (string) {
-        return string === null || string === undefined ? '' :
-            string.trim ?
-                string.trim() :
-                string.toString().replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
-    }
-
-
-    function stringStartsWith (string, startsWith) {
-        string = string || "";
-        if (startsWith.length > string.length)
-            return false;
-        return string.substring(0, startsWith.length) === startsWith;
-    }
-
-
-    function parseJson (jsonString) {
-        if (typeof jsonString == "string") {
-            jsonString = stringTrim(jsonString);
-            if (jsonString) {
-                if (JSON && JSON.parse) // Use native parsing where available
-                    return JSON.parse(jsonString);
-                return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
-            }
-        }
-        return null;
-    }
-
-
-    function stringifyJson (data, replacer, space) {   // replacer and space are optional
-        if (!JSON || !JSON.stringify)
-            throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
-        return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);
-    }
-
-
-    // DEPRECATE?
-    var fieldsIncludedWithJsonPost = 'DEPRECATED'
-    // var fieldsIncludedWithJsonPost = [
-    //   'authenticity_token', /^__RequestVerificationToken(_.*)?$/
-    // ];
-
-    function postJson () {
-        throw new Error("DEPRECATED")
-    }
-
-    //
-    // ES6 Symbols
-    //
-
-    var useSymbols = typeof Symbol === 'function';
-
-    function createSymbolOrString(identifier) {
-        return useSymbols ? Symbol(identifier) : identifier;
-    }
-
-    // For details on the pattern for changing node classes
-    // see: https://github.com/knockout/knockout/issues/1597
-    var cssClassNameRegex = /\S+/g;
-
-
-    function toggleDomNodeCssClass(node, classNames, shouldHaveClass) {
-        var addOrRemoveFn;
-        if (!classNames) { return }
-        if (typeof node.classList === 'object') {
-            addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];
-            arrayForEach(classNames.match(cssClassNameRegex), function(className) {
-                addOrRemoveFn.call(node.classList, className);
-            });
-        } else if (typeof node.className['baseVal'] === 'string') {
-            // SVG tag .classNames is an SVGAnimatedString instance
-            toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);
-        } else {
-            // node.className ought to be a string.
-            toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);
-        }
-    }
-
-
-    function toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {
-        // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.
-        var currentClassNames = obj[prop].match(cssClassNameRegex) || [];
-        arrayForEach(classNames.match(cssClassNameRegex), function(className) {
-            addOrRemoveItem(currentClassNames, className, shouldHaveClass);
-        });
-        obj[prop] = currentClassNames.join(" ");
-    }
-
-    //
-    // jQuery
-    //
-
-    var jQueryInstance = window && window.jQuery
-
-    function jQuerySetInstance(jquery) {
-        jQueryInstance = jquery
-    }
-
-    //
-    // This becomes ko.options
-    // --
-    //
-    // This is the root 'options', which must be extended by others.
-
-    var options = {
-        deferUpdates: false,
-        useOnlyNativeEvents: false
-    }
-
-    function domNodeIsContainedBy (node, containedByNode) {
-        if (node === containedByNode)
-            return true;
-        if (node.nodeType === 11)
-            return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8
-        if (containedByNode.contains)
-            return containedByNode.contains(node.nodeType === 3 ? node.parentNode : node);
-        if (containedByNode.compareDocumentPosition)
-            return (containedByNode.compareDocumentPosition(node) & 16) == 16;
-        while (node && node != containedByNode) {
-            node = node.parentNode;
-        }
-        return !!node;
-    }
-
-    function domNodeIsAttachedToDocument (node) {
-        return domNodeIsContainedBy(node, node.ownerDocument.documentElement);
-    }
-
-    function anyDomNodeIsAttachedToDocument(nodes) {
-        return !!arrayFirst(nodes, ko.utils.domNodeIsAttachedToDocument);
-    }
-
-    function tagNameLower(element) {
-        // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
-        // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
-        // we don't need to do the .toLowerCase() as it will always be lower case anyway.
-        return element && element.tagName && element.tagName.toLowerCase();
-    }
-
-    function isDomElement(obj) {
-        if (window.HTMLElement) {
-            return obj instanceof HTMLElement;
-        } else {
-            return obj && obj.tagName && obj.nodeType === 1;
-        }
-    }
-
-    function isDocumentFragment(obj) {
-        if (window.DocumentFragment) {
-            return obj instanceof DocumentFragment;
-        } else {
-            return obj && obj.nodeType === 11;
-        }
-    }
-
-    //
-    // DOM node data
-    //
-    // import {createSymbolOrString} from '../symbol.js'
-
-    var uniqueId = 0;
-    var dataStoreKeyExpandoPropertyName = "__ko__data" + new Date();
-    var dataStore = {};
-
-
-    function getAll(node, createIfNotFound) {
-        var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-        var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
-        if (!hasExistingDataStore) {
-            if (!createIfNotFound)
-                return undefined;
-            dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
-            dataStore[dataStoreKey] = {};
-        }
-        return dataStore[dataStoreKey];
-    }
-
-    function get(node, key) {
-        var allDataForNode = getAll(node, false);
-        return allDataForNode === undefined ? undefined : allDataForNode[key];
-    }
-
-    function set(node, key, value) {
-        if (value === undefined) {
-            // Make sure we don't actually create a new domData key if we are actually deleting a value
-            if (getAll(node, false) === undefined)
-                return;
-        }
-        var allDataForNode = getAll(node, true);
-        allDataForNode[key] = value;
-    }
-
-    function clear(node) {
-        var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
-        if (dataStoreKey) {
-            delete dataStore[dataStoreKey];
-            node[dataStoreKeyExpandoPropertyName] = null;
-            return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
-        }
-        return false;
-    }
-
-    function nextKey() {
-        return (uniqueId++) + dataStoreKeyExpandoPropertyName;
-    }
-
-
-    var domData = Object.freeze({
-        get: get,
-        set: set,
-        clear: clear,
-        nextKey: nextKey
-    });
-
-    var domDataKey = nextKey();
-    // Node types:
-    // 1: Element
-    // 8: Comment
-    // 9: Document
-    var cleanableNodeTypes = { 1: true, 8: true, 9: true };
-    var cleanableNodeTypesWithDescendants = { 1: true, 9: true };
-
-    function getDisposeCallbacksCollection(node, createIfNotFound) {
-        var allDisposeCallbacks = get(node, domDataKey);
-        if ((allDisposeCallbacks === undefined) && createIfNotFound) {
-            allDisposeCallbacks = [];
-            set(node, domDataKey, allDisposeCallbacks);
-        }
-        return allDisposeCallbacks;
-    }
-    function destroyCallbacksCollection(node) {
-        set(node, domDataKey, undefined);
-    }
-
-    function cleanSingleNode(node) {
-        // Run all the dispose callbacks
-        var callbacks = getDisposeCallbacksCollection(node, false);
-        if (callbacks) {
-            callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
-            for (var i = 0; i < callbacks.length; i++)
-                callbacks[i](node);
-        }
-
-        // Erase the DOM data
-        clear(node);
-
-        // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)
-        cleanExternalData(node);
-
-        // Clear any immediate-child comment nodes, as these wouldn't have been found by
-        // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
-        if (cleanableNodeTypesWithDescendants[node.nodeType])
-            cleanImmediateCommentTypeChildren(node);
-    }
-
-    function cleanImmediateCommentTypeChildren(nodeWithChildren) {
-        var child, nextChild = nodeWithChildren.firstChild;
-        while (child = nextChild) {
-            nextChild = child.nextSibling;
-            if (child.nodeType === 8)
-                cleanSingleNode(child);
-        }
-    }
-
-    // Exports
-    function addDisposeCallback(node, callback) {
-        if (typeof callback != "function")
-            throw new Error("Callback must be a function");
-        getDisposeCallbacksCollection(node, true).push(callback);
-    }
-
-    function removeDisposeCallback(node, callback) {
-        var callbacksCollection = getDisposeCallbacksCollection(node, false);
-        if (callbacksCollection) {
-            arrayRemoveItem(callbacksCollection, callback);
-            if (callbacksCollection.length == 0)
-                destroyCallbacksCollection(node);
-        }
-    }
-
-    function cleanNode(node) {
-        // First clean this node, where applicable
-        if (cleanableNodeTypes[node.nodeType]) {
-            cleanSingleNode(node);
-
-            // ... then its descendants, where applicable
-            if (cleanableNodeTypesWithDescendants[node.nodeType]) {
-                // Clone the descendants list in case it changes during iteration
-                var descendants = [];
-                arrayPushAll(descendants, node.getElementsByTagName("*"));
-                for (var i = 0, j = descendants.length; i < j; i++)
-                    cleanSingleNode(descendants[i]);
-            }
-        }
-        return node;
-    }
-
-    function removeNode(node) {
-        cleanNode(node);
-        if (node.parentNode)
-            node.parentNode.removeChild(node);
-    }
-
-    function cleanExternalData (node) {
-        // Special support for jQuery here because it's so commonly used.
-        // Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
-        // so notify it to tear down any resources associated with the node & descendants here.
-
-        var jQueryCleanNodeFn = jQueryInstance
-            ? jQueryInstance.cleanData : null;
-
-        if (jQueryCleanNodeFn) {
-            jQueryCleanNodeFn([node]);
-        }
-    }
-
-    var knownEvents = {};
-    var knownEventTypesByEventName = {};
-    var keyEventTypeName = (navigator && /Firefox\/2/i.test(navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';
-
-    knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
-
-    knownEvents['MouseEvents'] = [
-        'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',
-        'mouseout', 'mouseenter', 'mouseleave'];
-
-
-    objectForEach(knownEvents, function(eventType, knownEventsForType) {
-        if (knownEventsForType.length) {
-            for (var i = 0, j = knownEventsForType.length; i < j; i++)
-                knownEventTypesByEventName[knownEventsForType[i]] = eventType;
-        }
-    });
-
-
-    function isClickOnCheckableElement(element, eventType) {
-        if ((tagNameLower(element) !== "input") || !element.type) return false;
-        if (eventType.toLowerCase() != "click") return false;
-        var inputType = element.type;
-        return (inputType == "checkbox") || (inputType == "radio");
-    }
-
-
-    // Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
-    var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };
-
-    function registerEventHandler(element, eventType, handler) {
-        var wrappedHandler = catchFunctionErrors(handler);
-
-        var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
-        if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {
-            jQueryInstance(element).bind(eventType, wrappedHandler);
-        } else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
-            element.addEventListener(eventType, wrappedHandler, false);
-        else if (typeof element.attachEvent !== "undefined") {
-            var attachEventHandler = function (event) { wrappedHandler.call(element, event); },
-                attachEventName = "on" + eventType;
-            element.attachEvent(attachEventName, attachEventHandler);
-
-            // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)
-            // so to avoid leaks, we have to remove them manually. See bug #856
-            addDisposeCallback(element, function() {
-                element.detachEvent(attachEventName, attachEventHandler);
-            });
-        } else
-            throw new Error("Browser doesn't support addEventListener or attachEvent");
-    }
-
-    function triggerEvent(element, eventType) {
-        if (!(element && element.nodeType))
-            throw new Error("element must be a DOM node when calling triggerEvent");
-
-        // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the
-        // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)
-        // IE doesn't change the checked state when you trigger the click event using "fireEvent".
-        // In both cases, we'll use the click method instead.
-        var useClickWorkaround = isClickOnCheckableElement(element, eventType);
-
-        if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {
-            jQueryInstance(element).trigger(eventType);
-        } else if (typeof document.createEvent == "function") {
-            if (typeof element.dispatchEvent == "function") {
-                var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
-                var event = document.createEvent(eventCategory);
-                event.initEvent(eventType, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
-                element.dispatchEvent(event);
-            }
-            else
-                throw new Error("The supplied element doesn't support dispatchEvent");
-        } else if (useClickWorkaround && element.click) {
-            element.click();
-        } else if (typeof element.fireEvent != "undefined") {
-            element.fireEvent("on" + eventType);
-        } else {
-            throw new Error("Browser doesn't support triggering events");
-        }
-    }
-
-    function fixUpContinuousNodeArray(continuousNodeArray, parentNode) {
-        // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile
-        // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that
-        // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
-        // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
-        // So, this function translates the old "map" output array into its best guess of the set of current DOM nodes.
-        //
-        // Rules:
-        //   [A] Any leading nodes that have been removed should be ignored
-        //       These most likely correspond to memoization nodes that were already removed during binding
-        //       See https://github.com/knockout/knockout/pull/440
-        //   [B] Any trailing nodes that have been remove should be ignored
-        //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]
-        //       See https://github.com/knockout/knockout/pull/1903
-        //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,
-        //       and include any nodes that have been inserted among the previous collection
-
-        if (continuousNodeArray.length) {
-            // The parent node can be a virtual element; so get the real parent node
-            parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;
-
-            // Rule [A]
-            while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)
-                continuousNodeArray.splice(0, 1);
-
-            // Rule [B]
-            while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)
-                continuousNodeArray.length--;
-
-            // Rule [C]
-            if (continuousNodeArray.length > 1) {
-                var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];
-                // Replace with the actual new continuous node set
-                continuousNodeArray.length = 0;
-                while (current !== last) {
-                    continuousNodeArray.push(current);
-                    current = current.nextSibling;
-                }
-                continuousNodeArray.push(last);
-            }
-        }
-        return continuousNodeArray;
-    }
-
-    function setOptionNodeSelectionState (optionNode, isSelected) {
-        // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
-        if (ieVersion < 7)
-            optionNode.setAttribute("selected", isSelected);
-        else
-            optionNode.selected = isSelected;
-    }
-
-
-    function forceRefresh(node) {
-        // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
-        if (ieVersion >= 9) {
-            // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
-            var elem = node.nodeType == 1 ? node : node.parentNode;
-            if (elem.style)
-                elem.style.zoom = elem.style.zoom;
-        }
-    }
-
-    function ensureSelectElementIsRenderedCorrectly(selectElement) {
-        // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.
-        // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
-        // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)
-        if (ieVersion) {
-            var originalWidth = selectElement.style.width;
-            selectElement.style.width = 0;
-            selectElement.style.width = originalWidth;
-        }
-    }
-
-
-    function getFormFields() {
-        // Use e.g. $(":input")
-        throw new Error("DEPRECATED")
-    }
-
-    var commentNodesHaveTextProperty = document && document.createComment("test").text === "<!--test-->";
-
-    var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
-    var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
-    var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
-
-    function isStartComment(node) {
-        return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-    }
-
-    function isEndComment(node) {
-        return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
-    }
-
-    function getVirtualChildren(startComment, allowUnbalanced) {
-        var currentNode = startComment;
-        var depth = 1;
-        var children = [];
-        while (currentNode = currentNode.nextSibling) {
-            if (isEndComment(currentNode)) {
-                depth--;
-                if (depth === 0)
-                    return children;
-            }
-
-            children.push(currentNode);
-
-            if (isStartComment(currentNode))
-                depth++;
-        }
-        if (!allowUnbalanced)
-            throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
-        return null;
-    }
-
-    function getMatchingEndComment(startComment, allowUnbalanced) {
-        var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
-        if (allVirtualChildren) {
-            if (allVirtualChildren.length > 0)
-                return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
-            return startComment.nextSibling;
-        } else
-            return null; // Must have no matching end comment, and allowUnbalanced is true
-    }
-
-    function getUnbalancedChildTags(node) {
-        // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
-        //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
-        var childNode = node.firstChild, captureRemaining = null;
-        if (childNode) {
-            do {
-                if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
-                    captureRemaining.push(childNode);
-                else if (isStartComment(childNode)) {
-                    var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
-                    if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
-                        childNode = matchingEndComment;
-                    else
-                        captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
-                } else if (isEndComment(childNode)) {
-                    captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
-                }
-            } while (childNode = childNode.nextSibling);
-        }
-        return captureRemaining;
-    }
-
-    var allowedBindings = {};
-    var hasBindingValue = isStartComment;
-
-    function childNodes(node) {
-        return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
-    }
-
-    function emptyNode(node) {
-        if (!isStartComment(node))
-            emptyDomNode(node);
-        else {
-            var virtualChildren = childNodes(node);
-            for (var i = 0, j = virtualChildren.length; i < j; i++)
-                removeNode(virtualChildren[i]);
-        }
-    }
-
-    function setDomNodeChildren(node, childNodes) {
-        if (!isStartComment(node))
-            setRegularDomNodeChildren(node, childNodes);
-        else {
-            emptyNode(node);
-            var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
-            for (var i = 0, j = childNodes.length; i < j; i++)
-                endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
-        }
-    }
-
-    function prepend(containerNode, nodeToPrepend) {
-        if (!isStartComment(containerNode)) {
-            if (containerNode.firstChild)
-                containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
-            else
-                containerNode.appendChild(nodeToPrepend);
-        } else {
-            // Start comments must always have a parent and at least one following sibling (the end comment)
-            containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
-        }
-    }
-
-    function insertAfter(containerNode, nodeToInsert, insertAfterNode) {
-        if (!insertAfterNode) {
-            prepend(containerNode, nodeToInsert);
-        } else if (!isStartComment(containerNode)) {
-            // Insert after insertion point
-            if (insertAfterNode.nextSibling)
-                containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-            else
-                containerNode.appendChild(nodeToInsert);
-        } else {
-            // Children of start comments must always have a parent and at least one following sibling (the end comment)
-            containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
-        }
-    }
-
-    function firstChild(node) {
-        if (!isStartComment(node))
-            return node.firstChild;
-        if (!node.nextSibling || isEndComment(node.nextSibling))
-            return null;
-        return node.nextSibling;
-    }
-
-    function nextSibling(node) {
-        if (isStartComment(node))
-            node = getMatchingEndComment(node);
-        if (node.nextSibling && isEndComment(node.nextSibling))
-            return null;
-        return node.nextSibling;
-    }
-
-    function virtualNodeBindingValue(node) {
-        var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
-        return regexMatch ? regexMatch[1] : null;
-    }
-
-    function normaliseVirtualElementDomStructure(elementVerified) {
-        // Workaround for https://github.com/SteveSanderson/knockout/issues/155
-        // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
-        // that are direct descendants of <ul> into the preceding <li>)
-        if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])
-            return;
-
-        // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
-        // must be intended to appear *after* that child, so move them there.
-        var childNode = elementVerified.firstChild;
-        if (childNode) {
-            do {
-                if (childNode.nodeType === 1) {
-                    var unbalancedTags = getUnbalancedChildTags(childNode);
-                    if (unbalancedTags) {
-                        // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
-                        var nodeToInsertBefore = childNode.nextSibling;
-                        for (var i = 0; i < unbalancedTags.length; i++) {
-                            if (nodeToInsertBefore)
-                                elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
-                            else
-                                elementVerified.appendChild(unbalancedTags[i]);
-                        }
-                    }
-                }
-            } while (childNode = childNode.nextSibling);
-        }
-    }
-
-
-    var virtualElements = Object.freeze({
-        isStartComment: isStartComment,
-        isEndComment: isEndComment,
-        getVirtualChildren: getVirtualChildren,
-        allowedBindings: allowedBindings,
-        hasBindingValue: hasBindingValue,
-        childNodes: childNodes,
-        emptyNode: emptyNode,
-        setDomNodeChildren: setDomNodeChildren,
-        prepend: prepend,
-        insertAfter: insertAfter,
-        firstChild: firstChild,
-        nextSibling: nextSibling,
-        virtualNodeBindingValue: virtualNodeBindingValue,
-        normaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure
-    });
-
-    function moveCleanedNodesToContainerElement(nodes) {
-        // Ensure it's a real array, as we're about to reparent the nodes and
-        // we don't want the underlying collection to change while we're doing that.
-        var nodesArray = makeArray(nodes);
-        var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;
-
-        var container = templateDocument.createElement('div');
-        for (var i = 0, j = nodesArray.length; i < j; i++) {
-            container.appendChild(cleanNode(nodesArray[i]));
-        }
-        return container;
-    }
-
-    function cloneNodes (nodesArray, shouldCleanNodes) {
-        for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
-            var clonedNode = nodesArray[i].cloneNode(true);
-            newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);
-        }
-        return newNodesArray;
-    }
-
-    function setRegularDomNodeChildren (domNode, childNodes) {
-        emptyDomNode(domNode);
-        if (childNodes) {
-            for (var i = 0, j = childNodes.length; i < j; i++)
-                domNode.appendChild(childNodes[i]);
-        }
-    }
-
-    function replaceDomNodes (nodeToReplaceOrNodeArray, newNodesArray) {
-        var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
-        if (nodesToReplaceArray.length > 0) {
-            var insertionPoint = nodesToReplaceArray[0];
-            var parent = insertionPoint.parentNode;
-            for (var i = 0, j = newNodesArray.length; i < j; i++)
-                parent.insertBefore(newNodesArray[i], insertionPoint);
-            for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {
-                removeNode(nodesToReplaceArray[i]);
-            }
-        }
-    }
-
-    function setElementName(element, name) {
-        element.name = name;
-
-        // Workaround IE 6/7 issue
-        // - https://github.com/SteveSanderson/knockout/issues/197
-        // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
-        if (ieVersion <= 7) {
-            try {
-                element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
-            }
-            catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
-        }
-    }
-
-    function setTextContent(element, textContent) {
-        var value = typeof textContent === 'function' ? textContent() : textContent;
-        if ((value === null) || (value === undefined))
-            value = "";
-
-        // We need there to be exactly one child: a text node.
-        // If there are no children, more than one, or if it's not a text node,
-        // we'll clear everything and create a single text node.
-        var innerTextNode = firstChild(element);
-        if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {
-            setDomNodeChildren(element, [element.ownerDocument.createTextNode(value)]);
-        } else {
-            innerTextNode.data = value;
-        }
-
-        forceRefresh(element);
-    }
-
-    function emptyDomNode (domNode) {
-        while (domNode.firstChild) {
-            removeNode(domNode.firstChild);
-        }
-    }
-
-    var none = [0, "", ""];
-    var table = [1, "<table>", "</table>"];
-    var tbody = [2, "<table><tbody>", "</tbody></table>"];
-    var colgroup = [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>"];
-    var tr = [3, "<table><tbody><tr>", "</tr></tbody></table>"];
-    var select = [1, "<select multiple='multiple'>", "</select>"];
-    var fieldset = [1, "<fieldset>", "</fieldset>"];
-    var map = [1, "<map>", "</map>"];
-    var object = [1, "<object>", "</object>"];
-    var lookup = {
-            'area': map,
-            'col': colgroup,
-            'colgroup': table,
-            'caption': table,
-            'legend': fieldset,
-            'thead': table,
-            'tbody': table,
-            'tfoot': table,
-            'tr': tbody,
-            'td': tr,
-            'th': tr,
-            'option': select,
-            'optgroup': select,
-            'param': object
-        };
-    var supportsTemplateTag = 'content' in document.createElement('template');
-    function getWrap(tags) {
-        var m = tags.match(/^<([a-z]+)[ >]/);
-        return (m && lookup[m[1]]) || none;
-    }
-
-
-    function simpleHtmlParse(html, documentContext) {
-        documentContext || (documentContext = document);
-        var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;
-
-        // Based on jQuery's "clean" function, but only accounting for table-related elements.
-        // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
-
-        // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
-        // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
-        // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
-        // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
-
-        // Trim whitespace, otherwise indexOf won't work as expected
-        var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement("div"),
-            wrap = getWrap(tags),
-            depth = wrap[0];
-
-        // Go to html and back, then peel off extra wrappers
-        // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
-        var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
-        if (typeof windowContext['innerShiv'] == "function") {
-            // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding
-            // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv
-            // somehow shims the native APIs so it just works anyway)
-            div.appendChild(windowContext['innerShiv'](markup));
-        } else {
-            div.innerHTML = markup;
-        }
-
-        // Move to the right depth
-        while (depth--)
-            div = div.lastChild;
-
-        return makeArray(div.lastChild.childNodes);
-    }
-
-
-    function templateHtmlParse(html, documentContext) {
-        if (!documentContext) { documentContext = document; }
-        var template = documentContext.createElement('template');
-        template.innerHTML = html;
-        return makeArray(template.content.childNodes);
-    }
-
-
-    function jQueryHtmlParse(html, documentContext) {
-        // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
-        if (jQueryInstance.parseHTML) {
-            return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null
-        } else {
-            // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
-            var elems = jQueryInstance.clean([html], documentContext);
-
-            // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
-            // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
-            // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
-            if (elems && elems[0]) {
-                // Find the top-most parent element that's a direct child of a document fragment
-                var elem = elems[0];
-                while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
-                    elem = elem.parentNode;
-                // ... then detach it
-                if (elem.parentNode)
-                    elem.parentNode.removeChild(elem);
-            }
-
-            return elems;
-        }
-    }
-
-
-    function parseHtmlFragment(html, documentContext) {
-        return supportsTemplateTag ? templateHtmlParse(html, documentContext) :
-            // Note jQuery's HTML parsing fails on element names like tr-*.
-            // See: https://github.com/jquery/jquery/pull/1988
-            (jQueryInstance ? jQueryHtmlParse(html, documentContext) :
-            // Benefit from jQuery's on old browsers, where possible
-
-            simpleHtmlParse(html, documentContext));
-            // ... otherwise, this simple logic will do in most common cases.
-    }
-
-
-    function setHtml(node, html) {
-        emptyDomNode(node);
-
-        // There's few cases where we would want to display a stringified
-        // function, so we unwrap it.
-        if (typeof html === 'function') {
-            html = html();
-        }
-
-        if ((html !== null) && (html !== undefined)) {
-            if (typeof html !== 'string')
-                html = html.toString();
-
-            // jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
-            // for example <tr> elements which are not normally allowed to exist on their own.
-            // If you've referenced jQuery we'll use that rather than duplicating its code.
-            if (jQueryInstance) {
-                jQueryInstance(node).html(html);
-            } else {
-                // ... otherwise, use KO's own parsing logic.
-                var parsedNodes = parseHtmlFragment(html, node.ownerDocument);
-                for (var i = 0; i < parsedNodes.length; i++)
-                    node.appendChild(parsedNodes[i]);
-            }
-        }
-    }
-
-    var memos = {};
-
-    function randomMax8HexChars() {
-        return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
-    }
-
-    function generateRandomId() {
-        return randomMax8HexChars() + randomMax8HexChars();
-    }
-
-    function findMemoNodes(rootNode, appendToArray) {
-        if (!rootNode)
-            return;
-        if (rootNode.nodeType == 8) {
-            var memoId = parseMemoText(rootNode.nodeValue);
-            if (memoId != null)
-                appendToArray.push({ domNode: rootNode, memoId: memoId });
-        } else if (rootNode.nodeType == 1) {
-            for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
-                findMemoNodes(childNodes[i], appendToArray);
-        }
-    }
-
-
-    function memoize(callback) {
-        if (typeof callback != "function")
-            throw new Error("You can only pass a function to memoization.memoize()");
-        var memoId = generateRandomId();
-        memos[memoId] = callback;
-        return "<!--[ko_memo:" + memoId + "]-->";
-    }
-
-    function unmemoize(memoId, callbackParams) {
-        var callback = memos[memoId];
-        if (callback === undefined)
-            throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
-        try {
-            callback.apply(null, callbackParams || []);
-            return true;
-        }
-        finally { delete memos[memoId]; }
-    }
-
-    function unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {
-        var memos = [];
-        findMemoNodes(domNode, memos);
-        for (var i = 0, j = memos.length; i < j; i++) {
-            var node = memos[i].domNode;
-            var combinedParams = [node];
-            if (extraCallbackParamsArray)
-                arrayPushAll(combinedParams, extraCallbackParamsArray);
-            unmemoize(memos[i].memoId, combinedParams);
-            node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
-            if (node.parentNode)
-                node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
-        }
-    }
-
-    function parseMemoText(memoText) {
-        var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
-        return match ? match[1] : null;
-    }
-
-
-    var memoization = Object.freeze({
-        memoize: memoize,
-        unmemoize: unmemoize,
-        unmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,
-        parseMemoText: parseMemoText
-    });
-
-    var scheduler;
-    var taskQueue = [];
-    var taskQueueLength = 0;
-    var nextHandle = 1;
-    var nextIndexToProcess = 0;
-    if (window['MutationObserver']) {
-        // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+
-        // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT
-        scheduler = (function (callback) {
-            var div = document.createElement("div");
-            new MutationObserver(callback).observe(div, {attributes: true});
-            return function () { div.classList.toggle("foo"); };
-        })(scheduledProcess);
-    } else if (document && "onreadystatechange" in document.createElement("script")) {
-        // IE 6-10
-        // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT
-        scheduler = function (callback) {
-            var script = document.createElement("script");
-            script.onreadystatechange = function () {
-                script.onreadystatechange = null;
-                document.documentElement.removeChild(script);
-                script = null;
-                callback();
-            };
-            document.documentElement.appendChild(script);
-        };
-    } else {
-        scheduler = function (callback) {
-            setTimeout(callback, 0);
-        };
-    }
-
-    function processTasks() {
-        if (taskQueueLength) {
-            // Each mark represents the end of a logical group of tasks and the number of these groups is
-            // limited to prevent unchecked recursion.
-            var mark = taskQueueLength, countMarks = 0;
-
-            // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue
-            for (var task; nextIndexToProcess < taskQueueLength; ) {
-                if (task = taskQueue[nextIndexToProcess++]) {
-                    if (nextIndexToProcess > mark) {
-                        if (++countMarks >= 5000) {
-                            nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion
-                            deferError(Error("'Too much recursion' after processing " + countMarks + " task groups."));
-                            break;
-                        }
-                        mark = taskQueueLength;
-                    }
-                    try {
-                        task();
-                    } catch (ex) {
-                        deferError(ex);
-                    }
-                }
-            }
-        }
-    }
-
-    function scheduledProcess() {
-        processTasks();
-
-        // Reset the queue
-        nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
-    }
-
-    function scheduleTaskProcessing() {
-        scheduler(scheduledProcess);
-    }
-
-
-    function schedule(func) {
-        if (!taskQueueLength) {
-            scheduleTaskProcessing();
-        }
-
-        taskQueue[taskQueueLength++] = func;
-        return nextHandle++;
-    }
-
-    function cancel(handle) {
-        var index = handle - (nextHandle - taskQueueLength);
-        if (index >= nextIndexToProcess && index < taskQueueLength) {
-            taskQueue[index] = null;
-        }
-    }
-
-    // For testing only: reset the queue and return the previous queue length
-    function resetForTesting() {
-        var length = taskQueueLength - nextIndexToProcess;
-        nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
-        return length;
-    }
-
-
-
-    var tasks = Object.freeze({
-        schedule: schedule,
-        cancel: cancel,
-        resetForTesting: resetForTesting,
-        get scheduler () { return scheduler; },
-        runEarly: processTasks
-    });
-
-    exports.tasks = tasks;
-    exports.virtualElements = virtualElements;
-    exports.domData = domData;
-    exports.memoization = memoization;
-    exports.jQuerySetInstance = jQuerySetInstance;
-    exports.options = options;
-    exports.arrayForEach = arrayForEach;
-    exports.arrayIndexOf = arrayIndexOf;
-    exports.arrayFirst = arrayFirst;
-    exports.arrayRemoveItem = arrayRemoveItem;
-    exports.arrayGetDistinctValues = arrayGetDistinctValues;
-    exports.arrayMap = arrayMap;
-    exports.arrayFilter = arrayFilter;
-    exports.arrayPushAll = arrayPushAll;
-    exports.addOrRemoveItem = addOrRemoveItem;
-    exports.makeArray = makeArray;
-    exports.range = range;
-    exports.findMovesInArrayComparison = findMovesInArrayComparison;
-    exports.compareArrays = compareArrays;
-    exports.onError = onError;
-    exports.catchFunctionErrors = catchFunctionErrors;
-    exports.deferError = deferError;
-    exports.setTimeout = safeSetTimeout;
-    exports.ieVersion = ieVersion;
-    exports.isIe6 = isIe6;
-    exports.isIe7 = isIe7;
-    exports.extend = extend;
-    exports.objectForEach = objectForEach;
-    exports.objectMap = objectMap;
-    exports.getObjectOwnProperty = getObjectOwnProperty;
-    exports.canSetPrototype = canSetPrototype;
-    exports.setPrototypeOf = setPrototypeOf;
-    exports.setPrototypeOfOrExtend = setPrototypeOfOrExtend;
-    exports.hasPrototype = hasPrototype;
-    exports.stringTrim = stringTrim;
-    exports.stringStartsWith = stringStartsWith;
-    exports.parseJson = parseJson;
-    exports.stringifyJson = stringifyJson;
-    exports.fieldsIncludedWithJsonPost = fieldsIncludedWithJsonPost;
-    exports.postJson = postJson;
-    exports.useSymbols = useSymbols;
-    exports.createSymbolOrString = createSymbolOrString;
-    exports.toggleDomNodeCssClass = toggleDomNodeCssClass;
-    exports.registerEventHandler = registerEventHandler;
-    exports.triggerEvent = triggerEvent;
-    exports.domNodeIsContainedBy = domNodeIsContainedBy;
-    exports.domNodeIsAttachedToDocument = domNodeIsAttachedToDocument;
-    exports.anyDomNodeIsAttachedToDocument = anyDomNodeIsAttachedToDocument;
-    exports.tagNameLower = tagNameLower;
-    exports.isDomElement = isDomElement;
-    exports.isDocumentFragment = isDocumentFragment;
-    exports.moveCleanedNodesToContainerElement = moveCleanedNodesToContainerElement;
-    exports.cloneNodes = cloneNodes;
-    exports.setDomNodeChildren = setRegularDomNodeChildren;
-    exports.replaceDomNodes = replaceDomNodes;
-    exports.setElementName = setElementName;
-    exports.setTextContent = setTextContent;
-    exports.emptyDomNode = emptyDomNode;
-    exports.fixUpContinuousNodeArray = fixUpContinuousNodeArray;
-    exports.setOptionNodeSelectionState = setOptionNodeSelectionState;
-    exports.forceRefresh = forceRefresh;
-    exports.ensureSelectElementIsRenderedCorrectly = ensureSelectElementIsRenderedCorrectly;
-    exports.getFormFields = getFormFields;
-    exports.parseHtmlFragment = parseHtmlFragment;
-    exports.setHtml = setHtml;
-    exports.addDisposeCallback = addDisposeCallback;
-    exports.removeDisposeCallback = removeDisposeCallback;
-    exports.cleanNode = cleanNode;
-    exports.removeNode = removeNode;
-    exports.cleanExternalData = cleanExternalData;
-
-    Object.defineProperty(exports, '__esModule', { value: true });
-
-}));
\ No newline at end of file

From 15249493c249b48a29a95e8d3a7208e9ecffe420 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 18:55:37 -0500
Subject: [PATCH 06/20] Use monorepo pattern and lerna for builds

---
 lerna.json                                    |  2 +-
 package.json                                  | 18 ++++----
 packages/knockout/package.json                |  9 ----
 packages/tko.bind/package.json                | 25 ++++------
 packages/tko.binding.component/package.json   | 16 +++++--
 packages/tko.binding.core/package.json        | 22 +++------
 packages/tko.binding.foreach/package.json     | 16 ++++---
 packages/tko.binding.if/package.json          | 22 +++------
 packages/tko.binding.template/package.json    | 24 ++++------
 packages/tko.computed/package.json            | 15 +++---
 packages/tko.filter.punches/package.json      | 15 +++---
 packages/tko.lifecycle/package.json           | 14 ++----
 packages/tko.observable/package.json          | 15 ++----
 packages/tko.provider.attr/package.json       | 13 ++++--
 .../tko.provider.bindingString/package.json   | 12 +++--
 packages/tko.provider.component/package.json  | 18 ++++++--
 packages/tko.provider.databind/package.json   | 11 +++--
 packages/tko.provider.multi/package.json      | 13 ++++--
 packages/tko.provider.mustache/package.json   | 22 ++++-----
 packages/tko.provider.virtual/package.json    | 14 ++++--
 packages/tko.provider/package.json            | 11 +++--
 packages/tko.utils.component/package.json     | 15 ++++--
 packages/tko.utils.parser/package.json        | 12 +++--
 packages/tko.utils/package.json               | 14 ++----
 .../{knockout => tko}/docs/amd-loading.md     |  0
 packages/{knockout => tko}/docs/animated.md   |  0
 packages/{knockout => tko}/docs/api.md        |  0
 packages/{knockout => tko}/docs/books.md      |  0
 .../{knockout => tko}/docs/browser-support.md |  0
 packages/{knockout => tko}/docs/docs.md       |  0
 packages/{knockout => tko}/docs/fn.md         |  0
 .../{knockout => tko}/docs/installation.md    |  0
 packages/{knockout => tko}/docs/intro.md      |  0
 .../{knockout => tko}/docs/introduction.md    |  0
 packages/{knockout => tko}/docs/json-data.md  |  0
 packages/{knockout => tko}/docs/links.md      |  0
 packages/{knockout => tko}/docs/plugins.md    |  0
 packages/tko/package.json                     | 32 +++++++++++++
 packages/{knockout => tko}/src/index.js       |  0
 rollup.config.js                              | 46 ++++++++++---------
 40 files changed, 240 insertions(+), 206 deletions(-)
 delete mode 100644 packages/knockout/package.json
 rename packages/{knockout => tko}/docs/amd-loading.md (100%)
 rename packages/{knockout => tko}/docs/animated.md (100%)
 rename packages/{knockout => tko}/docs/api.md (100%)
 rename packages/{knockout => tko}/docs/books.md (100%)
 rename packages/{knockout => tko}/docs/browser-support.md (100%)
 rename packages/{knockout => tko}/docs/docs.md (100%)
 rename packages/{knockout => tko}/docs/fn.md (100%)
 rename packages/{knockout => tko}/docs/installation.md (100%)
 rename packages/{knockout => tko}/docs/intro.md (100%)
 rename packages/{knockout => tko}/docs/introduction.md (100%)
 rename packages/{knockout => tko}/docs/json-data.md (100%)
 rename packages/{knockout => tko}/docs/links.md (100%)
 rename packages/{knockout => tko}/docs/plugins.md (100%)
 create mode 100644 packages/tko/package.json
 rename packages/{knockout => tko}/src/index.js (100%)

diff --git a/lerna.json b/lerna.json
index 935386df..0ea71f1b 100644
--- a/lerna.json
+++ b/lerna.json
@@ -3,5 +3,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "4.0.0-alpha3"
+  "version": "4.0.0-alpha4"
 }
diff --git a/package.json b/package.json
index dfff2f19..4c88a8b9 100644
--- a/package.json
+++ b/package.json
@@ -1,22 +1,17 @@
 {
-  "name": "tko",
-  "description": "TKO is an experimental fork of Knockout",
   "homepage": "http://knockoutjs.com/",
   "version": "4.0.0-alpha4",
   "license": "MIT",
   "author": "The Knockout.js Team",
-  "main": "dist/ko.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/knockout/tko.git"
   },
   "scripts": {
     "test": "lerna exec --concurrency=1 --loglevel=warn -- karma start ../../karma.conf.js --once",
+    "build": "lerna exec --concurrency=1 --loglevel=warn -- rollup -c ../../rollup.config.js",
     "lint": "standard",
-    "lerna": "lerna bootstrap --hoist --npm-client yarn",
-    "make": "npm run test && npm run build && npm run minify",
-    "build": "rollup -c rollup.config.js -o dist/ko.js",
-    "minify": "MINIFY=1 rollup -c rollup.config.js -o dist/ko.min.js"
+    "lerna": "lerna bootstrap --hoist --npm-client yarn"
   },
   "files": [
     "dist/"
@@ -49,9 +44,14 @@
     "electron": "^1.6.11",
     "eslint": "^4.9.0",
     "eslint-config-standard": "^10.2.1",
+    "eslint-plugin-import": "^2.7.0",
+    "eslint-plugin-node": "^5.2.0",
+    "eslint-plugin-promise": "^3.6.0",
+    "eslint-plugin-standard": "^3.0.1",
     "gulp": "^3.9.1",
     "gulp-rename": "^1.2.2",
     "gulp-replace": "^0.6.1",
+    "jasmine-core": "^2.8.0",
     "jquery": "^3.2.1",
     "js-yaml": "^3.9.1",
     "karma": "^1.7.0",
@@ -60,12 +60,12 @@
     "karma-electron-launcher": "^0.2.0",
     "karma-jasmine": "^1.1.0",
     "karma-mocha": "^1.3.0",
-    "karma-rollup-plugin": "^0.2.4",
+    "karma-rollup-preprocessor": "^5.0.1",
     "karma-sinon": "^1.0.5",
     "lerna": "^2.0.0",
     "lodash": "^4.17.4",
     "mocha": "^3.4.2",
-    "rollup": "^0.45.2",
+    "rollup": "^0.50.0",
     "rollup-plugin-babel": "^2.7.1",
     "rollup-plugin-babili": "^3.1.0",
     "rollup-plugin-commonjs": "^8.0.2",
diff --git a/packages/knockout/package.json b/packages/knockout/package.json
deleted file mode 100644
index d2b9c529..00000000
--- a/packages/knockout/package.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "name": "knockout",
-  "version": "4.0.0-alpha3",
-  "description": "Simplify dynamic HTML with Model-View-View-Model pattern",
-  "main": "index.js",
-  "repository": "git@github.com:knockout/knockout",
-  "author": "The Knockout Team",
-  "license": "MIT"
-}
diff --git a/packages/tko.bind/package.json b/packages/tko.bind/package.json
index 8b899e9e..9f4bb4bd 100644
--- a/packages/tko.bind/package.json
+++ b/packages/tko.bind/package.json
@@ -1,28 +1,21 @@
 {
   "name": "tko.bind",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO DOM-Observable Binding",
-  "main": "dist/tko.bind.js",
-  "module": "src/index.js",
+  "module": "dist/tko.bind.js",
   "dependencies": {
-    "tko.computed": "knockout/tko.computed",
-    "tko.lifecycle": "knockout/tko.lifecycle",
-    "tko.observable": "knockout/tko.observable",
-    "tko.provider": "knockout/tko.provider",
-    "tko.utils": "knockout/tko.utils"
+    "tko.computed": "4.0.0-alpha4",
+    "tko.lifecycle": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "files": [
-    "dist/",
-    "src/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/knockout/tko.bind.git"
+    "url": "git+https://github.com/knockout/tko.git"
   },
   "author": "Knockout Team",
   "license": "MIT",
diff --git a/packages/tko.binding.component/package.json b/packages/tko.binding.component/package.json
index bc18612f..977ccf85 100644
--- a/packages/tko.binding.component/package.json
+++ b/packages/tko.binding.component/package.json
@@ -1,9 +1,19 @@
 {
   "name": "tko.binding.component",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "component: binding for web components",
-  "main": "dist/tko.binding.component.js",
-  "module": "src/index.js",
+  "module": "dist/tko.binding.component.js",
   "license": "MIT",
+  "dependencies": {
+    "tko.bind": "4.0.0-alpha4",
+    "tko.lifecycle": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4",
+    "tko.utils.component": "4.0.0-alpha4"
+  },
+  "files": [
+    "dist/"
+  ],
   "karma": { "frameworks": ["jasmine"]}
 }
diff --git a/packages/tko.binding.core/package.json b/packages/tko.binding.core/package.json
index 14f80665..9bcab699 100644
--- a/packages/tko.binding.core/package.json
+++ b/packages/tko.binding.core/package.json
@@ -1,19 +1,11 @@
 {
   "name": "tko.binding.core",
-  "version": "0.2.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO Core bindings",
-  "main": "dist/tko.binding.core.js",
-  "module": "src/index.js",
+  "module": "dist/tko.binding.core.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.binding.core.git"
@@ -30,10 +22,10 @@
   },
   "homepage": "https://github.com/knockout/tko.util#readme",
   "dependencies": {
-    "tko.bind": "knockout/tko.bind",
-    "tko.computed": "knockout/tko.computed",
-    "tko.observable": "knockout/tko.observable",
-    "tko.utils": "knockout/tko.utils"
+    "tko.bind": "4.0.0-alpha4",
+    "tko.computed": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["jasmine"]
diff --git a/packages/tko.binding.foreach/package.json b/packages/tko.binding.foreach/package.json
index e38409e5..9427558a 100644
--- a/packages/tko.binding.foreach/package.json
+++ b/packages/tko.binding.foreach/package.json
@@ -1,12 +1,14 @@
 {
   "name": "tko.binding.foreach",
-  "version": "4.0.0-alpha2",
+  "version": "4.0.0-alpha4",
   "description": "Knockout Foreach Binding",
-  "main": "dist/tko.binding.foreach.js",
-  "module": "src/index.js",
+  "module": "dist/tko.binding.foreach.js",
   "scripts": {
     "test": "gulp test --once"
   },
+  "files": [
+    "dist/"
+  ],
   "repository": {
     "type": "git",
     "url": "https://github.com/knockout/tko.binding.foreach.git"
@@ -24,10 +26,10 @@
   "homepage": "https://github.com/knockout/tko.binding.foreach",
   "peerDependencies": {},
   "dependencies": {
-    "tko.bind": "knockout/tko.bind",
-    "tko.observable": "knockout/tko.observable",
-    "tko.provider": "knockout/tko.provider",
-    "tko.utils": "knockout/tko.utils"
+    "tko.bind": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["mocha", "chai", "sinon"]
diff --git a/packages/tko.binding.if/package.json b/packages/tko.binding.if/package.json
index 09d17f39..e59ad830 100644
--- a/packages/tko.binding.if/package.json
+++ b/packages/tko.binding.if/package.json
@@ -1,19 +1,11 @@
 {
   "name": "tko.binding.if",
-  "version": "0.2.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO conditional (if/ifnot/unless/with/else) bindings",
-  "main": "dist/tko.binding.if.js",
-  "module": "src/index.js",
+  "module": "dist/tko.binding.if.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.binding.if.git"
@@ -30,10 +22,10 @@
   },
   "homepage": "https://github.com/knockout/tko.binding.if#readme",
   "dependencies": {
-    "tko.bind": "knockout/tko.bind",
-    "tko.computed": "knockout/tko.computed",
-    "tko.observable": "knockout/tko.observable",
-    "tko.utils": "knockout/tko.utils"
+    "tko.bind": "4.0.0-alpha4",
+    "tko.computed": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["jasmine"]
diff --git a/packages/tko.binding.template/package.json b/packages/tko.binding.template/package.json
index d1631cbd..1679be26 100644
--- a/packages/tko.binding.template/package.json
+++ b/packages/tko.binding.template/package.json
@@ -1,19 +1,11 @@
 {
   "name": "tko.binding.template",
-  "version": "0.2.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO Template bindings",
-  "main": "dist/tko.binding.template.js",
-  "module": "src/index.js",
+  "module": "dist/tko.binding.template.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.binding.template.git"
@@ -30,15 +22,15 @@
   },
   "homepage": "https://github.com/knockout/tko.util#readme",
   "dependencies": {
-    "tko.bind": "knockout/tko.bind",
-    "tko.computed": "knockout/tko.computed",
-    "tko.observable": "knockout/tko.observable",
-    "tko.utils": "knockout/tko.utils"
+    "tko.bind": "4.0.0-alpha4",
+    "tko.computed": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["jasmine"]
   },
   "devDependencies": {
-    "tko.binding.if": "knockout/tko.binding.if"
+    "tko.binding.if": "4.0.0-alpha4"
   }
 }
diff --git a/packages/tko.computed/package.json b/packages/tko.computed/package.json
index ce3b1bd3..88641513 100644
--- a/packages/tko.computed/package.json
+++ b/packages/tko.computed/package.json
@@ -1,15 +1,14 @@
 {
   "name": "tko.computed",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO Computed Observables",
-  "main": "dist/tko.computed.js",
-  "module": "src/index.js",
+  "module": "dist/tko.computed.js",
+  "files": [
+    "dist/"
+  ],
   "dependencies": {
-    "tko.utils": "knockout/tko.utils",
-    "tko.observable": "knockout/tko.observable"
-  },
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "tko.utils": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4"
   },
   "repository": {
     "type": "git",
diff --git a/packages/tko.filter.punches/package.json b/packages/tko.filter.punches/package.json
index 63abd7ea..de0b92b0 100644
--- a/packages/tko.filter.punches/package.json
+++ b/packages/tko.filter.punches/package.json
@@ -1,15 +1,10 @@
 {
   "name": "tko.filter.punches",
-  "version": "0.2.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO filters from knockout punches",
-  "main": "dist/tko.filter.punches.js",
-  "module": "src/index.js",
+  "module": "dist/tko.filter.punches.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
   "scripts": {
     "test": "gulp test --once"
@@ -29,7 +24,9 @@
     "url": "https://github.com/knockout/tko/issues"
   },
   "homepage": "https://github.com/knockout/tko#readme",
-  "dependencies": {},
+  "dependencies": {
+    "tko.observable": "4.0.0-alpha4"
+  },
   "karma": {
     "frameworks": ["jasmine"]
   }
diff --git a/packages/tko.lifecycle/package.json b/packages/tko.lifecycle/package.json
index be6df508..29aec353 100644
--- a/packages/tko.lifecycle/package.json
+++ b/packages/tko.lifecycle/package.json
@@ -1,19 +1,15 @@
 {
   "dependencies": {
-    "tko.computed": "knockout/tko.computed",
-    "tko.utils": "knockout/tko.utils"
+    "tko.computed": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
   },
   "files": [
-    "dist/",
-    "src/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
   "name": "tko.lifecycle",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Knockout LifeCycle for object instances",
-  "main": "dist/tko.lifecycle.js",
-  "module": "src/index.js",
+  "module": "dist/tko.lifecycle.js",
   "repository": "git@github.com:knockout/tko.lifecycle.git",
   "author": "Knockout Team",
   "license": "MIT",
diff --git a/packages/tko.observable/package.json b/packages/tko.observable/package.json
index 96ba2424..b57e0c77 100644
--- a/packages/tko.observable/package.json
+++ b/packages/tko.observable/package.json
@@ -1,21 +1,14 @@
 {
   "name": "tko.observable",
-  "version": "0.1.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO subscribables and observables",
-  "main": "dist/tko.observable.js",
-  "module": "src/index.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
+  "module": "dist/tko.observable.js",
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.observable.git"
   },
   "files": [
-    "dist/",
-    "src/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
   "keywords": [
     "knockout",
@@ -31,7 +24,7 @@
   },
   "homepage": "https://github.com/knockout/tko.observable#readme",
   "dependencies": {
-    "tko.utils": "knockout/tko.utils"
+    "tko.utils": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["jasmine"]
diff --git a/packages/tko.provider.attr/package.json b/packages/tko.provider.attr/package.json
index 40a87417..4820c339 100644
--- a/packages/tko.provider.attr/package.json
+++ b/packages/tko.provider.attr/package.json
@@ -1,9 +1,14 @@
 {
   "name": "tko.provider.attr",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Link HTML attributes (e.g. ko-handler-name) to binding handlers",
-  "main": "dist/tko.provider.attr.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.attr.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
-  "karma": {"frameworks":["mocha","chai"]}
+  "dependencies": {
+    "tko.provider": "4.0.0-alpha4"
+  },
+  "karma": {"frameworks":["mocha","chai"] }
 }
diff --git a/packages/tko.provider.bindingString/package.json b/packages/tko.provider.bindingString/package.json
index a268fa97..316d4d5e 100644
--- a/packages/tko.provider.bindingString/package.json
+++ b/packages/tko.provider.bindingString/package.json
@@ -1,9 +1,15 @@
 {
   "name": "tko.provider.bindingString",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Abstract Base Class for providers that parse a binding string",
-  "main": "dist/tko.provider.bindingString.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.bindingString.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
+  "dependencies": {
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils.parser": "4.0.0-alpha4"
+  },
   "karma": { "frameworks": ["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.component/package.json b/packages/tko.provider.component/package.json
index 1fed4ad1..cefbd272 100644
--- a/packages/tko.provider.component/package.json
+++ b/packages/tko.provider.component/package.json
@@ -1,9 +1,19 @@
 {
   "name": "tko.provider.component",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Bind custom web components e.g. <custom-binding>",
-  "main": "dist/tko.provider.component.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.component.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
-  "karma": {"frameworks": ["jasmine"]}
+  "dependencies": {
+    "tko.computed": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4",
+    "tko.utils.component": "4.0.0-alpha4",
+    "tko.utils.parser": "4.0.0-alpha4"
+  },
+  "karma": {"frameworks": ["jasmine"] }
 }
diff --git a/packages/tko.provider.databind/package.json b/packages/tko.provider.databind/package.json
index bac99e9d..821bdcab 100644
--- a/packages/tko.provider.databind/package.json
+++ b/packages/tko.provider.databind/package.json
@@ -1,9 +1,14 @@
 {
   "name": "tko.provider.databind",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Link HTML attributes based on a `data-bind` HTML attribute",
-  "main": "dist/tko.provider.databind.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.databind.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
+  "dependencies": {
+    "tko.provider.bindingString": "4.0.0-alpha4"
+  },
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.provider.multi/package.json b/packages/tko.provider.multi/package.json
index 0725074a..58c6ccac 100644
--- a/packages/tko.provider.multi/package.json
+++ b/packages/tko.provider.multi/package.json
@@ -1,9 +1,14 @@
 {
   "name": "tko.provider.multi",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Combine multiple other providers into one",
-  "main": "dist/tko.provider.multi.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.multi.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
-  "karma":{"frameworks":["mocha", "chai"]}
+  "dependencies": {
+    "tko.provider": "4.0.0-alpha4"
+  },
+  "karma": { "frameworks": ["mocha", "chai"] }
 }
diff --git a/packages/tko.provider.mustache/package.json b/packages/tko.provider.mustache/package.json
index 5170f1f3..2552f334 100644
--- a/packages/tko.provider.mustache/package.json
+++ b/packages/tko.provider.mustache/package.json
@@ -1,19 +1,11 @@
 {
   "name": "tko.provider.mustache",
-  "version": "0.1.0",
+  "version": "4.0.0-alpha4",
   "description": "Interpolate text/node attributes {{ }}",
-  "main": "dist/tko.preprocessor.mustache.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.mustache.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.preprocessor.textInterpolation.git"
@@ -30,9 +22,11 @@
   },
   "homepage": "https://github.com/knockout/tko.preprocessor.textInterpolation#readme",
   "dependencies": {
-    "tko.binding.template": "knockout/tko.binding.template",
-    "tko.utils": "knockout/tko.utils",
-    "tko.provider": "knockout/tko.provider"
+    "tko.binding.template": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4",
+    "tko.utils.parser": "4.0.0-alpha4"
   },
   "karma": {
     "frameworks": ["jasmine"]
diff --git a/packages/tko.provider.virtual/package.json b/packages/tko.provider.virtual/package.json
index f446db70..fccc183a 100644
--- a/packages/tko.provider.virtual/package.json
+++ b/packages/tko.provider.virtual/package.json
@@ -1,10 +1,16 @@
 {
   "name": "tko.provider.virtual",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Binding provider for <!-- ko handler: ... --> virtual elements",
-  "main": "dist/tko.provider.virtual.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.virtual.js",
+  "files": [
+    "dist/"
+  ],
   "author": "Knockout Team",
   "license": "MIT",
-  "karma": { "frameworks": ["mocha", "chai"]}
+  "dependencies": {
+    "tko.utils": "4.0.0-alpha4",
+    "tko.provider.bindingString": "4.0.0-alpha4"
+  },
+  "karma": { "frameworks": ["mocha", "chai"] }
 }
diff --git a/packages/tko.provider/package.json b/packages/tko.provider/package.json
index 11f585c5..bf451f7c 100644
--- a/packages/tko.provider/package.json
+++ b/packages/tko.provider/package.json
@@ -1,10 +1,15 @@
 {
   "name": "tko.provider",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Abstract base class of tko Provider (HTML <-> Data Binding linker)",
-  "main": "dist/tko.provider.js",
-  "module": "src/index.js",
+  "module": "dist/tko.provider.js",
+  "files": [
+    "dist/"
+  ],
   "author": "Knockout Team",
   "license": "MIT",
+  "dependencies": {
+    "tko.utils": "4.0.0-alpha4"
+  },
   "karma" : { "frameworks": ["mocha", "chai"] }
 }
diff --git a/packages/tko.utils.component/package.json b/packages/tko.utils.component/package.json
index 1060fd27..4c9e8650 100644
--- a/packages/tko.utils.component/package.json
+++ b/packages/tko.utils.component/package.json
@@ -1,9 +1,16 @@
 {
   "name": "tko.utils.component",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Registry and loading utilities for web components",
-  "main": "dist/tko.utils.component.js",
-  "module": "src/index.js",
+  "module": "dist/tko.utils.component.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
-  "karma": {"frameworks":["jasmine"]}
+  "dependencies": {
+    "tko.lifecycle": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
+  },
+  "karma": {"frameworks":["jasmine"] }
 }
diff --git a/packages/tko.utils.parser/package.json b/packages/tko.utils.parser/package.json
index 9e4dbb1e..8d99247c 100644
--- a/packages/tko.utils.parser/package.json
+++ b/packages/tko.utils.parser/package.json
@@ -1,9 +1,15 @@
 {
   "name": "tko.utils.parser",
-  "version": "1.0.0",
+  "version": "4.0.0-alpha4",
   "description": "Parse the Javascript-like language used in data-bind and other HTML attributes (CSP-safe)",
-  "main": "dist/tko.utils.parser.js",
-  "module": "src/index.js",
+  "module": "dist/tko.utils.parser.js",
+  "files": [
+    "dist/"
+  ],
   "license": "MIT",
+  "dependencies": {
+    "tko.observable": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4"
+  },
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.utils/package.json b/packages/tko.utils/package.json
index b33f4acf..9b4a51f6 100644
--- a/packages/tko.utils/package.json
+++ b/packages/tko.utils/package.json
@@ -1,19 +1,11 @@
 {
   "name": "tko.utils",
-  "version": "0.1.0",
+  "version": "4.0.0-alpha4",
   "description": "TKO Utilities",
-  "main": "dist/tko.utils.js",
-  "module": "src/index.js",
+  "module": "dist/tko.utils.js",
   "files": [
-    "dist/",
-    "src/",
-    "helpers/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/knockout/tko.utils.git"
diff --git a/packages/knockout/docs/amd-loading.md b/packages/tko/docs/amd-loading.md
similarity index 100%
rename from packages/knockout/docs/amd-loading.md
rename to packages/tko/docs/amd-loading.md
diff --git a/packages/knockout/docs/animated.md b/packages/tko/docs/animated.md
similarity index 100%
rename from packages/knockout/docs/animated.md
rename to packages/tko/docs/animated.md
diff --git a/packages/knockout/docs/api.md b/packages/tko/docs/api.md
similarity index 100%
rename from packages/knockout/docs/api.md
rename to packages/tko/docs/api.md
diff --git a/packages/knockout/docs/books.md b/packages/tko/docs/books.md
similarity index 100%
rename from packages/knockout/docs/books.md
rename to packages/tko/docs/books.md
diff --git a/packages/knockout/docs/browser-support.md b/packages/tko/docs/browser-support.md
similarity index 100%
rename from packages/knockout/docs/browser-support.md
rename to packages/tko/docs/browser-support.md
diff --git a/packages/knockout/docs/docs.md b/packages/tko/docs/docs.md
similarity index 100%
rename from packages/knockout/docs/docs.md
rename to packages/tko/docs/docs.md
diff --git a/packages/knockout/docs/fn.md b/packages/tko/docs/fn.md
similarity index 100%
rename from packages/knockout/docs/fn.md
rename to packages/tko/docs/fn.md
diff --git a/packages/knockout/docs/installation.md b/packages/tko/docs/installation.md
similarity index 100%
rename from packages/knockout/docs/installation.md
rename to packages/tko/docs/installation.md
diff --git a/packages/knockout/docs/intro.md b/packages/tko/docs/intro.md
similarity index 100%
rename from packages/knockout/docs/intro.md
rename to packages/tko/docs/intro.md
diff --git a/packages/knockout/docs/introduction.md b/packages/tko/docs/introduction.md
similarity index 100%
rename from packages/knockout/docs/introduction.md
rename to packages/tko/docs/introduction.md
diff --git a/packages/knockout/docs/json-data.md b/packages/tko/docs/json-data.md
similarity index 100%
rename from packages/knockout/docs/json-data.md
rename to packages/tko/docs/json-data.md
diff --git a/packages/knockout/docs/links.md b/packages/tko/docs/links.md
similarity index 100%
rename from packages/knockout/docs/links.md
rename to packages/tko/docs/links.md
diff --git a/packages/knockout/docs/plugins.md b/packages/tko/docs/plugins.md
similarity index 100%
rename from packages/knockout/docs/plugins.md
rename to packages/tko/docs/plugins.md
diff --git a/packages/tko/package.json b/packages/tko/package.json
new file mode 100644
index 00000000..3536fd6a
--- /dev/null
+++ b/packages/tko/package.json
@@ -0,0 +1,32 @@
+{
+  "name": "tko",
+  "version": "4.0.0-alpha4",
+  "description": "Simplify dynamic HTML with Model-View-View-Model pattern",
+  "main": "dist/tko.js",
+  "repository": "git@github.com:knockout/tko",
+  "author": "The Knockout Team",
+  "license": "MIT",
+  "dependencies": {
+    "tko.bind": "4.0.0-alpha4",
+    "tko.binding.component": "4.0.0-alpha4",
+    "tko.binding.core": "4.0.0-alpha4",
+    "tko.binding.foreach": "4.0.0-alpha4",
+    "tko.binding.if": "4.0.0-alpha4",
+    "tko.binding.template": "4.0.0-alpha4",
+    "tko.computed": "4.0.0-alpha4",
+    "tko.filter.punches": "4.0.0-alpha4",
+    "tko.lifecycle": "4.0.0-alpha4",
+    "tko.observable": "4.0.0-alpha4",
+    "tko.provider": "4.0.0-alpha4",
+    "tko.provider.attr": "4.0.0-alpha4",
+    "tko.provider.bindingString": "4.0.0-alpha4",
+    "tko.provider.component": "4.0.0-alpha4",
+    "tko.provider.databind": "4.0.0-alpha4",
+    "tko.provider.multi": "4.0.0-alpha4",
+    "tko.provider.mustache": "4.0.0-alpha4",
+    "tko.provider.virtual": "4.0.0-alpha4",
+    "tko.utils": "4.0.0-alpha4",
+    "tko.utils.component": "4.0.0-alpha4",
+    "tko.utils.parser": "4.0.0-alpha4"
+  }
+}
diff --git a/packages/knockout/src/index.js b/packages/tko/src/index.js
similarity index 100%
rename from packages/knockout/src/index.js
rename to packages/tko/src/index.js
diff --git a/rollup.config.js b/rollup.config.js
index a6e6415f..c608fdd5 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,38 +1,42 @@
-
-import fs from 'fs'
+import * as fs from 'fs'
+import * as path from 'path'
 import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
-import rollupBabili from 'rollup-plugin-babili'
 import rollupVisualizer from 'rollup-plugin-visualizer'
-import includePaths from 'rollup-plugin-includepaths'
-
 
-const pkg = JSON.parse(fs.readFileSync("package.json"))
+const pkg = JSON.parse(fs.readFileSync('package.json'))
+const { LERNA_PACKAGE_NAME, LERNA_ROOT_PATH } = process.env
+const PACKAGE_ROOT_PATH = path.join(LERNA_ROOT_PATH, 'packages', LERNA_PACKAGE_NAME)
+const IS_BROWSER_BUNDLE = LERNA_PACKAGE_NAME === 'tko'
 
 const CONFIG = {
+  EXTERNAL: IS_BROWSER_BUNDLE ? undefined : getTkoModules(),
+  FORMAT: IS_BROWSER_BUNDLE ? 'umd' : 'es',
+  INPUT: path.join(PACKAGE_ROOT_PATH, 'src/index.js'),
   /* Replace {{VERSION}} with pkg.json's `version` */
-  BABILI: {sourceMap: true},
-  INCLUDE_PATHS: { paths: [ "packages" ] },
-  REPLACE: {delimiters: ['{{', '}}'], VERSION: pkg.version},
-  RESOLVE: {jsnext: true, customResolveOptions: {moduleDirectory: "packages"}},
-  VISUALIZER: { filename: "visual.html" },
+  REPLACE: { delimiters: ['{{', '}}'], VERSION: pkg.version },
+  RESOLVE: { module: true },
+  VISUALIZER: { filename: 'visual.html' }
 }
 
 const plugins = [
-  includePaths(CONFIG.INCLUDE_PATHS),
   replace(CONFIG.REPLACE),
   nodeResolve(CONFIG.RESOLVE),
-  rollupVisualizer(CONFIG.VISUALIZER),
+  rollupVisualizer(CONFIG.VISUALIZER)
 ]
 
-if (process.env.MINIFY) {
-  plugins.push(rollupBabili(CONFIG.BABILI))
-}
-
 export default {
   plugins,
-  entry: 'index.js',
-  format: 'umd',
-  moduleName: 'ko',
-  sourceMap: true,
+  input: CONFIG.INPUT,
+  external: CONFIG.EXTERNAL,
+  output: {
+    file: path.join(PACKAGE_ROOT_PATH, 'dist', `${LERNA_PACKAGE_NAME}.js`),
+    format: CONFIG.FORMAT,
+    name: LERNA_PACKAGE_NAME
+  },
+  sourcemap: true
+}
+
+function getTkoModules () {
+  return fs.readdirSync(path.resolve(__dirname, 'packages'))
 }

From 09657cbcf67aa4ae51277ebb62fd18d236b7aac9 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 19:13:59 -0500
Subject: [PATCH 07/20] :construction: WIP

---
 karma.conf.js                                 | 25 ++++++++++---------
 package.json                                  |  1 -
 .../spec/arrayToDomEditDetectionBehaviors.js  |  2 +-
 .../tko.bind/spec/asyncBindingBehaviors.js    |  2 +-
 .../spec/bindingAttributeBehaviors.js         |  2 +-
 .../spec/bindingCompletionPromiseBehavior.js  |  2 +-
 .../spec/bindingDependencyBehaviors.js        |  2 +-
 .../tko.bind/spec/bindingHandlerBehaviour.js  |  2 +-
 .../spec/nodePreprocessingBehaviors.js        |  2 +-
 .../spec/componentBindingBehaviors.js         |  2 +-
 .../tko.binding.core/spec/attrBehaviors.js    |  2 +-
 .../tko.binding.core/spec/checkedBehaviors.js |  2 +-
 .../tko.binding.core/spec/clickBehaviors.js   |  2 +-
 .../tko.binding.core/spec/cssBehaviors.js     |  2 +-
 .../spec/enableDisableBehaviors.js            |  2 +-
 .../tko.binding.core/spec/eventBehaviors.js   |  2 +-
 .../spec/hasfocusBehaviors.js                 |  2 +-
 .../tko.binding.core/spec/htmlBehaviors.js    |  2 +-
 .../tko.binding.core/spec/letBehaviors.js     |  2 +-
 .../tko.binding.core/spec/optionsBehaviors.js |  2 +-
 .../spec/selectedOptionsBehaviors.js          |  2 +-
 .../tko.binding.core/spec/styleBehaviors.js   |  2 +-
 .../tko.binding.core/spec/submitBehaviors.js  |  2 +-
 .../tko.binding.core/spec/textBehaviors.js    |  2 +-
 .../spec/textInputBehaviors.js                |  2 +-
 .../spec/uniqueNameBehaviors.js               |  2 +-
 .../tko.binding.core/spec/valueBehaviors.js   |  2 +-
 .../tko.binding.core/spec/visibleBehaviors.js |  2 +-
 packages/tko.binding.if/spec/elseBehaviors.js |  2 +-
 packages/tko.binding.if/spec/ifBehaviors.js   |  2 +-
 .../tko.binding.if/spec/ifnotBehaviors.js     |  2 +-
 packages/tko.binding.if/spec/withBehaviors.js |  2 +-
 .../helpers/dummyTemplateEngine.js            |  2 +-
 .../spec/foreachBehaviors.js                  |  2 +-
 .../spec/nativeTemplateEngineBehaviors.js     |  2 +-
 .../spec/templatingBehaviors.js               |  2 +-
 packages/tko.computed/spec/asyncBehaviors.js  |  2 +-
 .../tko.computed/spec/computedDomBehaviors.js |  2 +-
 .../spec/computedObservableBehaviors.js       |  2 +-
 .../spec/pureComputedBehaviors.js             |  2 +-
 .../tko.filter.punches/spec/filterBehavior.js |  2 +-
 .../tko.lifecycle/spec/LifeCycleBehaviour.js  |  2 +-
 .../tko.observable/spec/extenderBehaviors.js  |  2 +-
 .../spec/mappingHelperBehaviors.js            |  2 +-
 .../spec/observableArrayBehaviors.js          |  2 +-
 .../observableArrayChangeTrackingBehaviors.js |  2 +-
 .../spec/observableBehaviors.js               |  2 +-
 .../spec/subscribableBehaviors.js             |  2 +-
 .../spec/AttributeProviderBehaviour.js        |  2 +-
 .../spec/BindingStringProviderBehaviour.js    |  2 +-
 .../spec/componentProviderBehaviors.js        |  2 +-
 .../spec/customElementBehaviors.js            |  2 +-
 .../spec/dataBindProviderBehaviour.js         |  2 +-
 .../spec/MultiProviderBehaviour.js            |  2 +-
 .../spec/attributeInterpolationSpec.js        |  2 +-
 .../spec/textInterpolationSpec.js             |  2 +-
 .../spec/virtualProviderBehaviour.js          |  2 +-
 .../tko.provider/spec/providerBehaviour.js    |  2 +-
 .../spec/ComponentABCBehaviours.js            |  2 +-
 .../spec/defaultLoaderBehaviors.js            |  2 +-
 .../spec/loaderRegistryBehaviors.js           |  2 +-
 .../tko.utils.parser/spec/filterBehaviors.js  |  2 +-
 .../spec/identifierBehaviour.js               |  2 +-
 .../spec/namespaceBehaviors.js                |  2 +-
 .../tko.utils.parser/spec/nodeBehaviors.js    |  2 +-
 .../tko.utils.parser/spec/parserBehaviors.js  |  2 +-
 .../tko.utils/helpers/jasmine-13-helper.js    |  2 +-
 .../spec/arrayEditDetectionBehaviors.js       |  2 +-
 .../spec/domNodeDisposalBehaviors.js          |  2 +-
 .../tko.utils/spec/memoizationBehaviors.js    |  2 +-
 packages/tko.utils/spec/onErrorBehaviors.js   |  2 +-
 .../spec/parseHtmlFragmentBehavior.js         |  2 +-
 packages/tko.utils/spec/taskBehaviors.js      |  2 +-
 packages/tko.utils/spec/utilsBehaviors.js     |  2 +-
 packages/tko.utils/spec/utilsDomBehaviors.js  |  4 +--
 rollup.config.js                              |  3 +++
 76 files changed, 90 insertions(+), 87 deletions(-)

diff --git a/karma.conf.js b/karma.conf.js
index 08ae9032..7e20b2bd 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -6,7 +6,7 @@ const path = require('path')
 const nodeResolve = require('rollup-plugin-node-resolve')
 const rollupCommonJS = require('rollup-plugin-commonjs')
 const rollupVisualizer = require('rollup-plugin-visualizer')
-const includePaths = require('rollup-plugin-includepaths')
+// const includePaths = require('rollup-plugin-includepaths')
 
 const pkg = JSON.parse(fs.readFileSync('package.json'))
 
@@ -22,21 +22,22 @@ if (!pkg.karma || !pkg.karma.frameworks) {
 }
 
 const frameworks = pkg.karma.frameworks
-const browsers = ['Electron']
+// const browsers = ['Electron']
+const browsers = ['Chrome']
 
 const files = [
-  { pattern: 'src/*.js', included: false, watched: true },
-  { pattern: 'spec/*.js' }
+  // { pattern: 'src/*.js', included: false, watched: true },
+  { pattern: 'spec/*.js', watched: false }
 ]
 
 const preprocessors = {
-  'src/**/*.js': ['rollup'],
+  // 'src/**/*.js': ['rollup'],
   'spec/**/*.js': ['rollup']
 }
 
 const ROLLUP_CONFIG = {
-  INCLUDE_PATHS: { paths: [ path.join(root, '../..') ] },
-  RESOLVE: {jsnext: true},
+  // INCLUDE_PATHS: { paths: [ path.join(root, '../..') ] },
+  RESOLVE: {module: true},
   VISUALIZER: { filename: './visual.html' },
   COMMONJS: {}
 }
@@ -53,14 +54,14 @@ const ROLLUP_CONFIG = {
 
 const rollupPreprocessor = Object.assign({}, {
   format: 'iife',
-  moduleName: pkg.name,
+  name: pkg.name,
   plugins: [
-    includePaths(ROLLUP_CONFIG.INCLUDE_PATHS),
+    // includePaths(ROLLUP_CONFIG.INCLUDE_PATHS),
     nodeResolve(ROLLUP_CONFIG.RESOLVE),
     rollupVisualizer(ROLLUP_CONFIG.VISUALIZER),
     rollupCommonJS(ROLLUP_CONFIG.COMMONJS)
   ],
-  sourceMap: process.argv.includes('--sourcemap') ? 'inline' : false
+  sourcemap: process.argv.includes('--sourcemap') ? 'inline' : false
 })
 
 module.exports = (config) => {
@@ -79,7 +80,7 @@ module.exports = (config) => {
       show: false,
       fullscreenable: false,
       hasShadow: false
-    },
-    singleRun: process.argv.includes('--once')
+    }
+    // singleRun: process.argv.includes('--once')
   })
 }
diff --git a/package.json b/package.json
index 4c88a8b9..857b1e48 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,6 @@
     "gulp": "^3.9.1",
     "gulp-rename": "^1.2.2",
     "gulp-replace": "^0.6.1",
-    "jasmine-core": "^2.8.0",
     "jquery": "^3.2.1",
     "js-yaml": "^3.9.1",
     "karma": "^1.7.0",
diff --git a/packages/tko.bind/spec/arrayToDomEditDetectionBehaviors.js b/packages/tko.bind/spec/arrayToDomEditDetectionBehaviors.js
index d492e917..be219d57 100644
--- a/packages/tko.bind/spec/arrayToDomEditDetectionBehaviors.js
+++ b/packages/tko.bind/spec/arrayToDomEditDetectionBehaviors.js
@@ -9,7 +9,7 @@ import {
 
 import {
     setDomNodeChildrenFromArrayMapping
-} from '../index';
+} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.bind/spec/asyncBindingBehaviors.js b/packages/tko.bind/spec/asyncBindingBehaviors.js
index 7f81b7c5..4bd638b2 100644
--- a/packages/tko.bind/spec/asyncBindingBehaviors.js
+++ b/packages/tko.bind/spec/asyncBindingBehaviors.js
@@ -16,7 +16,7 @@ import {bindings as templateBindings} from 'tko.binding.template';
 
 import {
     applyBindings
-} from '../index';
+} from '../src';
 
 import {
     useMockForTasks
diff --git a/packages/tko.bind/spec/bindingAttributeBehaviors.js b/packages/tko.bind/spec/bindingAttributeBehaviors.js
index 2b27e78a..f5739bd1 100644
--- a/packages/tko.bind/spec/bindingAttributeBehaviors.js
+++ b/packages/tko.bind/spec/bindingAttributeBehaviors.js
@@ -14,7 +14,7 @@ import { DataBindProvider } from 'tko.provider.databind'
 import {
     applyBindings, dataFor, bindingContext,
     applyBindingsToDescendants, applyBindingsToNode, contextFor
-} from '../index.js';
+} from '../src';
 
 import { bindings as coreBindings } from 'tko.binding.core';
 import { bindings as templateBindings } from 'tko.binding.template';
diff --git a/packages/tko.bind/spec/bindingCompletionPromiseBehavior.js b/packages/tko.bind/spec/bindingCompletionPromiseBehavior.js
index d0ef5177..43835450 100644
--- a/packages/tko.bind/spec/bindingCompletionPromiseBehavior.js
+++ b/packages/tko.bind/spec/bindingCompletionPromiseBehavior.js
@@ -14,7 +14,7 @@ import { DataBindProvider } from 'tko.provider.databind'
 
 import {
     applyBindings, BindingHandler, applyBindingsToDescendants
-} from '../index.js'
+} from '../src'
 
 import { bindings as coreBindings } from 'tko.binding.core'
 import { bindings as templateBindings } from 'tko.binding.template'
diff --git a/packages/tko.bind/spec/bindingDependencyBehaviors.js b/packages/tko.bind/spec/bindingDependencyBehaviors.js
index 3f9b1c31..e61b5508 100644
--- a/packages/tko.bind/spec/bindingDependencyBehaviors.js
+++ b/packages/tko.bind/spec/bindingDependencyBehaviors.js
@@ -24,7 +24,7 @@ import { VirtualProvider } from 'tko.provider.virtual';
 import {
     applyBindings, contextFor,
     applyBindingsToDescendants
-} from '../index.js';
+} from '../src';
 
 import {bindings as coreBindings} from 'tko.binding.core';
 
diff --git a/packages/tko.bind/spec/bindingHandlerBehaviour.js b/packages/tko.bind/spec/bindingHandlerBehaviour.js
index f0a06944..e14a3f55 100644
--- a/packages/tko.bind/spec/bindingHandlerBehaviour.js
+++ b/packages/tko.bind/spec/bindingHandlerBehaviour.js
@@ -22,7 +22,7 @@ import {
 import {
     applyBindings, dataFor, bindingContext, BindingHandler,
     applyBindingsToDescendants, applyBindingsToNode, contextFor
-} from '../index.js';
+} from '../src';
 
 import { bindings as coreBindings } from 'tko.binding.core';
 import { bindings as templateBindings } from 'tko.binding.template';
diff --git a/packages/tko.bind/spec/nodePreprocessingBehaviors.js b/packages/tko.bind/spec/nodePreprocessingBehaviors.js
index e4c9342b..c8f14575 100644
--- a/packages/tko.bind/spec/nodePreprocessingBehaviors.js
+++ b/packages/tko.bind/spec/nodePreprocessingBehaviors.js
@@ -14,7 +14,7 @@ import {
 
 import {
     applyBindings
-} from '../index';
+} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.component/spec/componentBindingBehaviors.js b/packages/tko.binding.component/spec/componentBindingBehaviors.js
index 1e24249f..7691171d 100644
--- a/packages/tko.binding.component/spec/componentBindingBehaviors.js
+++ b/packages/tko.binding.component/spec/componentBindingBehaviors.js
@@ -30,7 +30,7 @@ import {
 
 import {
   bindings as componentBindings
-} from '../index'
+} from '../src'
 
 import components from 'tko.utils.component'
 
diff --git a/packages/tko.binding.core/spec/attrBehaviors.js b/packages/tko.binding.core/spec/attrBehaviors.js
index 49f5f507..8ce6657d 100644
--- a/packages/tko.binding.core/spec/attrBehaviors.js
+++ b/packages/tko.binding.core/spec/attrBehaviors.js
@@ -16,7 +16,7 @@ import {
     options
 } from 'tko.utils'
 
-import * as coreBindings from '../index.js'
+import * as coreBindings from '../src'
 
 import 'tko.utils/helpers/jasmine-13-helper.js'
 
diff --git a/packages/tko.binding.core/spec/checkedBehaviors.js b/packages/tko.binding.core/spec/checkedBehaviors.js
index 91f3448d..874c59b9 100644
--- a/packages/tko.binding.core/spec/checkedBehaviors.js
+++ b/packages/tko.binding.core/spec/checkedBehaviors.js
@@ -23,7 +23,7 @@ import {
     options
 } from 'tko.utils';
 
-import { bindings as coreBindings } from '../index.js';
+import { bindings as coreBindings } from '../src';
 import { bindings as templateBindings } from 'tko.binding.template';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
diff --git a/packages/tko.binding.core/spec/clickBehaviors.js b/packages/tko.binding.core/spec/clickBehaviors.js
index 2a1dd923..6f80f1f0 100644
--- a/packages/tko.binding.core/spec/clickBehaviors.js
+++ b/packages/tko.binding.core/spec/clickBehaviors.js
@@ -12,7 +12,7 @@ import {
     options
 } from 'tko.utils';
 
-import { bindings as coreBindings } from '../index.js';
+import { bindings as coreBindings } from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/cssBehaviors.js b/packages/tko.binding.core/spec/cssBehaviors.js
index 22dcca64..a8ed569d 100644
--- a/packages/tko.binding.core/spec/cssBehaviors.js
+++ b/packages/tko.binding.core/spec/cssBehaviors.js
@@ -13,7 +13,7 @@ import {
 } from 'tko.utils';
 
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/enableDisableBehaviors.js b/packages/tko.binding.core/spec/enableDisableBehaviors.js
index 961d2bea..c73ab061 100644
--- a/packages/tko.binding.core/spec/enableDisableBehaviors.js
+++ b/packages/tko.binding.core/spec/enableDisableBehaviors.js
@@ -12,7 +12,7 @@ import {
     options
 } from 'tko.utils';
 
-import { bindings as coreBindings } from '../index.js';
+import { bindings as coreBindings } from '../src';
 
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
diff --git a/packages/tko.binding.core/spec/eventBehaviors.js b/packages/tko.binding.core/spec/eventBehaviors.js
index d5782a13..d7ee8448 100644
--- a/packages/tko.binding.core/spec/eventBehaviors.js
+++ b/packages/tko.binding.core/spec/eventBehaviors.js
@@ -16,7 +16,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/hasfocusBehaviors.js b/packages/tko.binding.core/spec/hasfocusBehaviors.js
index 669524d4..939d8d7b 100644
--- a/packages/tko.binding.core/spec/hasfocusBehaviors.js
+++ b/packages/tko.binding.core/spec/hasfocusBehaviors.js
@@ -18,7 +18,7 @@ import {
     options
 } from 'tko.utils';
 
-import * as coreBindings from '../index.js';
+import * as coreBindings from '../src';
 
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
diff --git a/packages/tko.binding.core/spec/htmlBehaviors.js b/packages/tko.binding.core/spec/htmlBehaviors.js
index 7db263c2..113371d5 100644
--- a/packages/tko.binding.core/spec/htmlBehaviors.js
+++ b/packages/tko.binding.core/spec/htmlBehaviors.js
@@ -10,7 +10,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/letBehaviors.js b/packages/tko.binding.core/spec/letBehaviors.js
index e5ad03b8..daa2d0c9 100644
--- a/packages/tko.binding.core/spec/letBehaviors.js
+++ b/packages/tko.binding.core/spec/letBehaviors.js
@@ -14,7 +14,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/optionsBehaviors.js b/packages/tko.binding.core/spec/optionsBehaviors.js
index e3edbc3f..45a3332b 100644
--- a/packages/tko.binding.core/spec/optionsBehaviors.js
+++ b/packages/tko.binding.core/spec/optionsBehaviors.js
@@ -18,7 +18,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/selectedOptionsBehaviors.js b/packages/tko.binding.core/spec/selectedOptionsBehaviors.js
index 7ce66fd7..cced1199 100644
--- a/packages/tko.binding.core/spec/selectedOptionsBehaviors.js
+++ b/packages/tko.binding.core/spec/selectedOptionsBehaviors.js
@@ -14,7 +14,7 @@ import {
     options, triggerEvent
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/styleBehaviors.js b/packages/tko.binding.core/spec/styleBehaviors.js
index 2d7b3950..da39fb22 100644
--- a/packages/tko.binding.core/spec/styleBehaviors.js
+++ b/packages/tko.binding.core/spec/styleBehaviors.js
@@ -14,7 +14,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/submitBehaviors.js b/packages/tko.binding.core/spec/submitBehaviors.js
index e53a05c1..fa205aeb 100644
--- a/packages/tko.binding.core/spec/submitBehaviors.js
+++ b/packages/tko.binding.core/spec/submitBehaviors.js
@@ -14,7 +14,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/textBehaviors.js b/packages/tko.binding.core/spec/textBehaviors.js
index c3066c14..bb30c535 100644
--- a/packages/tko.binding.core/spec/textBehaviors.js
+++ b/packages/tko.binding.core/spec/textBehaviors.js
@@ -14,7 +14,7 @@ import {
     options
 } from 'tko.utils';
 
-import * as coreBindings from '../index.js';
+import * as coreBindings from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/textInputBehaviors.js b/packages/tko.binding.core/spec/textInputBehaviors.js
index 9c14b380..22924515 100644
--- a/packages/tko.binding.core/spec/textInputBehaviors.js
+++ b/packages/tko.binding.core/spec/textInputBehaviors.js
@@ -20,7 +20,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/uniqueNameBehaviors.js b/packages/tko.binding.core/spec/uniqueNameBehaviors.js
index 16f21466..a367ad3b 100644
--- a/packages/tko.binding.core/spec/uniqueNameBehaviors.js
+++ b/packages/tko.binding.core/spec/uniqueNameBehaviors.js
@@ -10,7 +10,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/valueBehaviors.js b/packages/tko.binding.core/spec/valueBehaviors.js
index e4c2e75d..804d5694 100644
--- a/packages/tko.binding.core/spec/valueBehaviors.js
+++ b/packages/tko.binding.core/spec/valueBehaviors.js
@@ -21,7 +21,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as coreBindings} from '../index.js';
+import {bindings as coreBindings} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.core/spec/visibleBehaviors.js b/packages/tko.binding.core/spec/visibleBehaviors.js
index 65a924c4..51a18af5 100644
--- a/packages/tko.binding.core/spec/visibleBehaviors.js
+++ b/packages/tko.binding.core/spec/visibleBehaviors.js
@@ -14,7 +14,7 @@ import {
 
 import {
     bindings as coreBindings
-} from '../index.js';
+} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.binding.if/spec/elseBehaviors.js b/packages/tko.binding.if/spec/elseBehaviors.js
index b9f34fcb..b599c33b 100644
--- a/packages/tko.binding.if/spec/elseBehaviors.js
+++ b/packages/tko.binding.if/spec/elseBehaviors.js
@@ -17,7 +17,7 @@ import {
 
 import {
     bindings as ifBindings,
-} from '../index.js';
+} from '../src';
 
 import {
     bindings as coreBindings
diff --git a/packages/tko.binding.if/spec/ifBehaviors.js b/packages/tko.binding.if/spec/ifBehaviors.js
index d3087f0e..a2632cbe 100644
--- a/packages/tko.binding.if/spec/ifBehaviors.js
+++ b/packages/tko.binding.if/spec/ifBehaviors.js
@@ -20,7 +20,7 @@ import {
   // setTemplateEngine,
   // templateEngine,
   // nativeTemplateEngine
-} from '../index.js';
+} from '../src';
 
 import {bindings as coreBindings} from 'tko.binding.core';
 
diff --git a/packages/tko.binding.if/spec/ifnotBehaviors.js b/packages/tko.binding.if/spec/ifnotBehaviors.js
index f29d85a4..aff4e3cd 100644
--- a/packages/tko.binding.if/spec/ifnotBehaviors.js
+++ b/packages/tko.binding.if/spec/ifnotBehaviors.js
@@ -20,7 +20,7 @@ import {
   // setTemplateEngine,
   // templateEngine,
   // nativeTemplateEngine
-} from '../index.js';
+} from '../src';
 
 import {bindings as coreBindings} from 'tko.binding.core';
 
diff --git a/packages/tko.binding.if/spec/withBehaviors.js b/packages/tko.binding.if/spec/withBehaviors.js
index 0fcafd33..0ba315c6 100644
--- a/packages/tko.binding.if/spec/withBehaviors.js
+++ b/packages/tko.binding.if/spec/withBehaviors.js
@@ -14,7 +14,7 @@ import { DataBindProvider } from 'tko.provider.databind'
 import { MultiProvider } from 'tko.provider.multi'
 import { VirtualProvider } from 'tko.provider.virtual'
 
-import {bindings as withBindings} from '../index.js';
+import {bindings as withBindings} from '../src';
 import {bindings as coreBindings} from 'tko.binding.core';
 import {bindings as templateBindings} from 'tko.binding.template'
 
diff --git a/packages/tko.binding.template/helpers/dummyTemplateEngine.js b/packages/tko.binding.template/helpers/dummyTemplateEngine.js
index 0a3df897..c1c7d18f 100644
--- a/packages/tko.binding.template/helpers/dummyTemplateEngine.js
+++ b/packages/tko.binding.template/helpers/dummyTemplateEngine.js
@@ -5,7 +5,7 @@ import {
 
 import {
     renderTemplate, anonymousTemplate, templateEngine
-} from '../index.js';
+} from '../src';
 
 
 export function dummyTemplateEngine(templates) {
diff --git a/packages/tko.binding.template/spec/foreachBehaviors.js b/packages/tko.binding.template/spec/foreachBehaviors.js
index 388750ee..b823e535 100644
--- a/packages/tko.binding.template/spec/foreachBehaviors.js
+++ b/packages/tko.binding.template/spec/foreachBehaviors.js
@@ -18,7 +18,7 @@ import {
     options
 } from 'tko.utils';
 
-import {bindings as templateBindings} from '../index.js';
+import {bindings as templateBindings} from '../src';
 import {bindings as ifBindings} from 'tko.binding.if';
 import {bindings as coreBindings} from 'tko.binding.core';
 
diff --git a/packages/tko.binding.template/spec/nativeTemplateEngineBehaviors.js b/packages/tko.binding.template/spec/nativeTemplateEngineBehaviors.js
index 241858f3..9c532636 100644
--- a/packages/tko.binding.template/spec/nativeTemplateEngineBehaviors.js
+++ b/packages/tko.binding.template/spec/nativeTemplateEngineBehaviors.js
@@ -18,7 +18,7 @@ import {
     bindings as templateBindings,
     renderTemplate,
     anonymousTemplate
-} from '../index.js';
+} from '../src';
 import {
     bindings as coreBindings
 } from 'tko.binding.core';
diff --git a/packages/tko.binding.template/spec/templatingBehaviors.js b/packages/tko.binding.template/spec/templatingBehaviors.js
index 7b9c65c1..b3a9f582 100644
--- a/packages/tko.binding.template/spec/templatingBehaviors.js
+++ b/packages/tko.binding.template/spec/templatingBehaviors.js
@@ -21,7 +21,7 @@ import {
 import {
     bindings as templateBindings, renderTemplate,
     setTemplateEngine, nativeTemplateEngine
-} from '../index.js';
+} from '../src';
 
 import {
   bindings as coreBindings
diff --git a/packages/tko.computed/spec/asyncBehaviors.js b/packages/tko.computed/spec/asyncBehaviors.js
index 9f628787..0752912a 100644
--- a/packages/tko.computed/spec/asyncBehaviors.js
+++ b/packages/tko.computed/spec/asyncBehaviors.js
@@ -19,7 +19,7 @@ import {
 import {
     computed as koComputed,
     pureComputed as koPureComputed
-} from '../index.js';
+} from '../src';
 
 import {
     useMockForTasks
diff --git a/packages/tko.computed/spec/computedDomBehaviors.js b/packages/tko.computed/spec/computedDomBehaviors.js
index 7e4b924c..13864718 100644
--- a/packages/tko.computed/spec/computedDomBehaviors.js
+++ b/packages/tko.computed/spec/computedDomBehaviors.js
@@ -8,7 +8,7 @@ import {
 
 import {
     computed as Computed
-} from '../index';
+} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.computed/spec/computedObservableBehaviors.js b/packages/tko.computed/spec/computedObservableBehaviors.js
index c8d40c61..a4dd27f3 100644
--- a/packages/tko.computed/spec/computedObservableBehaviors.js
+++ b/packages/tko.computed/spec/computedObservableBehaviors.js
@@ -6,7 +6,7 @@ import {
 
 import {
     computed, isPureComputed, isComputed
-} from '../index.js';
+} from '../src';
 
 describe('Dependent Observable', function() {
     it('Should be subscribable', function () {
diff --git a/packages/tko.computed/spec/pureComputedBehaviors.js b/packages/tko.computed/spec/pureComputedBehaviors.js
index 683ff3c4..d26fc45f 100644
--- a/packages/tko.computed/spec/pureComputedBehaviors.js
+++ b/packages/tko.computed/spec/pureComputedBehaviors.js
@@ -4,7 +4,7 @@ import {
 
 import {
     isPureComputed, isComputed, computed, pureComputed
-} from '../index.js';
+} from '../src';
 
 
 describe('Pure Computed', function() {
diff --git a/packages/tko.filter.punches/spec/filterBehavior.js b/packages/tko.filter.punches/spec/filterBehavior.js
index 9669a08c..8ed85830 100644
--- a/packages/tko.filter.punches/spec/filterBehavior.js
+++ b/packages/tko.filter.punches/spec/filterBehavior.js
@@ -4,7 +4,7 @@ import {
   observable
 } from 'tko.observable'
 
-import { filters } from '../index'
+import { filters } from '../src'
 
 if (!Array.isArray) {
   Array.isArray = function(arg) {
diff --git a/packages/tko.lifecycle/spec/LifeCycleBehaviour.js b/packages/tko.lifecycle/spec/LifeCycleBehaviour.js
index fe50619e..a821e205 100644
--- a/packages/tko.lifecycle/spec/LifeCycleBehaviour.js
+++ b/packages/tko.lifecycle/spec/LifeCycleBehaviour.js
@@ -10,7 +10,7 @@ import {
 
 import {
   LifeCycle
-} from '../index'
+} from '../src'
 
 describe('KO LifeCycle', function () {
   describe('mixInto', function () {
diff --git a/packages/tko.observable/spec/extenderBehaviors.js b/packages/tko.observable/spec/extenderBehaviors.js
index 870c357c..651dc2df 100644
--- a/packages/tko.observable/spec/extenderBehaviors.js
+++ b/packages/tko.observable/spec/extenderBehaviors.js
@@ -2,7 +2,7 @@
 import {
     subscribable as Subscribable,
     extenders
-} from '../index';
+} from '../src';
 
 describe('Extenders', function() {
     it('Should be able to extend any subscribable', function () {
diff --git a/packages/tko.observable/spec/mappingHelperBehaviors.js b/packages/tko.observable/spec/mappingHelperBehaviors.js
index 46d01cc0..3b6879b6 100644
--- a/packages/tko.observable/spec/mappingHelperBehaviors.js
+++ b/packages/tko.observable/spec/mappingHelperBehaviors.js
@@ -4,7 +4,7 @@
 
 import {
     toJS, toJSON, isObservable, observable, observableArray
-} from '../index.js';
+} from '../src';
 
 describe('Mapping helpers', function() {
     it('toJS should require a parameter', function() {
diff --git a/packages/tko.observable/spec/observableArrayBehaviors.js b/packages/tko.observable/spec/observableArrayBehaviors.js
index 67e13fdb..5c36cb1d 100644
--- a/packages/tko.observable/spec/observableArrayBehaviors.js
+++ b/packages/tko.observable/spec/observableArrayBehaviors.js
@@ -1,7 +1,7 @@
 
 import {
     observableArray, observable, isObservable, subscribable
-} from '../index.js';
+} from '../src';
 
 describe('Observable Array', function() {
     var testObservableArray, notifiedValues, beforeNotifiedValues;
diff --git a/packages/tko.observable/spec/observableArrayChangeTrackingBehaviors.js b/packages/tko.observable/spec/observableArrayChangeTrackingBehaviors.js
index 6c97f1bf..1f556413 100644
--- a/packages/tko.observable/spec/observableArrayChangeTrackingBehaviors.js
+++ b/packages/tko.observable/spec/observableArrayChangeTrackingBehaviors.js
@@ -1,7 +1,7 @@
 
 import {
     observableArray, observable
-} from '../index.js';
+} from '../src';
 
 import {
     trackArrayChanges
diff --git a/packages/tko.observable/spec/observableBehaviors.js b/packages/tko.observable/spec/observableBehaviors.js
index 3ea138c1..6bd4c571 100644
--- a/packages/tko.observable/spec/observableBehaviors.js
+++ b/packages/tko.observable/spec/observableBehaviors.js
@@ -4,7 +4,7 @@ import {
     observable, isSubscribable, isObservable,
     isWriteableObservable, isWritableObservable, subscribable,
     unwrap
-} from '../index.js';
+} from '../src';
 
 
 describe('Observable', function() {
diff --git a/packages/tko.observable/spec/subscribableBehaviors.js b/packages/tko.observable/spec/subscribableBehaviors.js
index f87c0fff..ea35d3ef 100644
--- a/packages/tko.observable/spec/subscribableBehaviors.js
+++ b/packages/tko.observable/spec/subscribableBehaviors.js
@@ -1,7 +1,7 @@
 
 import {
     isSubscribable, subscribable
-} from '../index.js';
+} from '../src';
 
 describe('Subscribable', function() {
     it('Should declare that it is subscribable', function () {
diff --git a/packages/tko.provider.attr/spec/AttributeProviderBehaviour.js b/packages/tko.provider.attr/spec/AttributeProviderBehaviour.js
index c4b08094..00b97d20 100644
--- a/packages/tko.provider.attr/spec/AttributeProviderBehaviour.js
+++ b/packages/tko.provider.attr/spec/AttributeProviderBehaviour.js
@@ -1,7 +1,7 @@
 
 import {
   AttributeProvider
-} from '../index'
+} from '../src'
 
 describe("Attribute Provider Behaviour", function () {
   describe('nodeHasBindings', function () {
diff --git a/packages/tko.provider.bindingString/spec/BindingStringProviderBehaviour.js b/packages/tko.provider.bindingString/spec/BindingStringProviderBehaviour.js
index c54f4103..f7ad0ab3 100644
--- a/packages/tko.provider.bindingString/spec/BindingStringProviderBehaviour.js
+++ b/packages/tko.provider.bindingString/spec/BindingStringProviderBehaviour.js
@@ -1,7 +1,7 @@
 
 import {
   BindingStringProvider
-} from '../index'
+} from '../src'
 
 
 describe("Binding String Provider behaviour", function () {
diff --git a/packages/tko.provider.component/spec/componentProviderBehaviors.js b/packages/tko.provider.component/spec/componentProviderBehaviors.js
index 0501ed71..1f0046e2 100644
--- a/packages/tko.provider.component/spec/componentProviderBehaviors.js
+++ b/packages/tko.provider.component/spec/componentProviderBehaviors.js
@@ -24,7 +24,7 @@ import {
 
 import components from 'tko.utils.component'
 
-import { ComponentProvider } from '../index.js'
+import { ComponentProvider } from '../src'
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.provider.component/spec/customElementBehaviors.js b/packages/tko.provider.component/spec/customElementBehaviors.js
index ea791ae5..c3c842e5 100644
--- a/packages/tko.provider.component/spec/customElementBehaviors.js
+++ b/packages/tko.provider.component/spec/customElementBehaviors.js
@@ -36,7 +36,7 @@ import {
   bindings as componentBindings
 } from 'tko.binding.component'
 
-import {ComponentProvider} from '../index'
+import {ComponentProvider} from '../src'
 
 import {
     useMockForTasks
diff --git a/packages/tko.provider.databind/spec/dataBindProviderBehaviour.js b/packages/tko.provider.databind/spec/dataBindProviderBehaviour.js
index 1a15b75c..d82ffcc6 100644
--- a/packages/tko.provider.databind/spec/dataBindProviderBehaviour.js
+++ b/packages/tko.provider.databind/spec/dataBindProviderBehaviour.js
@@ -34,7 +34,7 @@ import {
 
 import {
   DataBindProvider
-} from '../index.js'
+} from '../src'
 
 import * as coreBindings from 'tko.binding.core';
 
diff --git a/packages/tko.provider.multi/spec/MultiProviderBehaviour.js b/packages/tko.provider.multi/spec/MultiProviderBehaviour.js
index 22c266f8..e0833ac0 100644
--- a/packages/tko.provider.multi/spec/MultiProviderBehaviour.js
+++ b/packages/tko.provider.multi/spec/MultiProviderBehaviour.js
@@ -1,7 +1,7 @@
 
 import {
   MultiProvider
-} from '../index'
+} from '../src'
 
 
 describe("MultiProvider Behaviour", function () {
diff --git a/packages/tko.provider.mustache/spec/attributeInterpolationSpec.js b/packages/tko.provider.mustache/spec/attributeInterpolationSpec.js
index efeccb76..6a0f300f 100644
--- a/packages/tko.provider.mustache/spec/attributeInterpolationSpec.js
+++ b/packages/tko.provider.mustache/spec/attributeInterpolationSpec.js
@@ -26,7 +26,7 @@ import {
 
 import {
     AttributeMustacheProvider
-} from '../index.js';
+} from '../src';
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.provider.mustache/spec/textInterpolationSpec.js b/packages/tko.provider.mustache/spec/textInterpolationSpec.js
index fec47c23..d5cf8340 100644
--- a/packages/tko.provider.mustache/spec/textInterpolationSpec.js
+++ b/packages/tko.provider.mustache/spec/textInterpolationSpec.js
@@ -31,7 +31,7 @@ import {
 
 import {
     TextMustacheProvider
-} from '../index.js';
+} from '../src';
 
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
diff --git a/packages/tko.provider.virtual/spec/virtualProviderBehaviour.js b/packages/tko.provider.virtual/spec/virtualProviderBehaviour.js
index 95b88aa1..a877db87 100644
--- a/packages/tko.provider.virtual/spec/virtualProviderBehaviour.js
+++ b/packages/tko.provider.virtual/spec/virtualProviderBehaviour.js
@@ -1,7 +1,7 @@
 
 import {
   VirtualProvider
-} from '../index'
+} from '../src'
 
 /**
  * There aren't many tests here because virtual bindings are used throughout
diff --git a/packages/tko.provider/spec/providerBehaviour.js b/packages/tko.provider/spec/providerBehaviour.js
index 79e47de3..503918b4 100644
--- a/packages/tko.provider/spec/providerBehaviour.js
+++ b/packages/tko.provider/spec/providerBehaviour.js
@@ -1,7 +1,7 @@
 
 import {
   Provider
-} from '../index'
+} from '../src'
 
 describe('Provider', function () {
   it("throws an error if not subclassed", function () {
diff --git a/packages/tko.utils.component/spec/ComponentABCBehaviours.js b/packages/tko.utils.component/spec/ComponentABCBehaviours.js
index 43a08efb..9e7af3e0 100644
--- a/packages/tko.utils.component/spec/ComponentABCBehaviours.js
+++ b/packages/tko.utils.component/spec/ComponentABCBehaviours.js
@@ -20,7 +20,7 @@ import { bindings as templateBindings } from 'tko.binding.template'
 import { bindings as ifBindings } from 'tko.binding.if'
 import { bindings as componentBindings } from 'tko.binding.component'
 
-import components from '../index'
+import components from '../src'
 const {ComponentABC} = components
 
 import {
diff --git a/packages/tko.utils.component/spec/defaultLoaderBehaviors.js b/packages/tko.utils.component/spec/defaultLoaderBehaviors.js
index ca6dc4aa..3ed0c6ae 100644
--- a/packages/tko.utils.component/spec/defaultLoaderBehaviors.js
+++ b/packages/tko.utils.component/spec/defaultLoaderBehaviors.js
@@ -2,7 +2,7 @@ import {
     parseHtmlFragment
 } from 'tko.utils'
 
-import components from '../index'
+import components from '../src'
 
 import 'tko.utils/helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.utils.component/spec/loaderRegistryBehaviors.js b/packages/tko.utils.component/spec/loaderRegistryBehaviors.js
index 9c9d7546..433f7166 100644
--- a/packages/tko.utils.component/spec/loaderRegistryBehaviors.js
+++ b/packages/tko.utils.component/spec/loaderRegistryBehaviors.js
@@ -7,7 +7,7 @@ import {
     computed
 } from 'tko.computed';
 
-import components from '../index';
+import components from '../src';
 
 
 describe('Components: Loader registry', function() {
diff --git a/packages/tko.utils.parser/spec/filterBehaviors.js b/packages/tko.utils.parser/spec/filterBehaviors.js
index d964afa0..7981134c 100644
--- a/packages/tko.utils.parser/spec/filterBehaviors.js
+++ b/packages/tko.utils.parser/spec/filterBehaviors.js
@@ -10,7 +10,7 @@ import {
 
 import {
   Parser
-} from '../index.js';
+} from '../src';
 
 function ctxStub (o) { return { lookup (p) { return o[p] } } }
 
diff --git a/packages/tko.utils.parser/spec/identifierBehaviour.js b/packages/tko.utils.parser/spec/identifierBehaviour.js
index 5cc4d6c8..556a767c 100644
--- a/packages/tko.utils.parser/spec/identifierBehaviour.js
+++ b/packages/tko.utils.parser/spec/identifierBehaviour.js
@@ -28,7 +28,7 @@ import {
 
 import {
   Identifier, Arguments
-} from '../index'
+} from '../src'
 
 
 describe("Identifier", function() {
diff --git a/packages/tko.utils.parser/spec/namespaceBehaviors.js b/packages/tko.utils.parser/spec/namespaceBehaviors.js
index 787f6c89..f317efd9 100644
--- a/packages/tko.utils.parser/spec/namespaceBehaviors.js
+++ b/packages/tko.utils.parser/spec/namespaceBehaviors.js
@@ -22,7 +22,7 @@ import {
 
 import {
   Parser
-} from '../index.js';
+} from '../src';
 
 function ctxStub (ctx) {
   return { lookup (v) { return ctx ? ctx[v] : null } }
diff --git a/packages/tko.utils.parser/spec/nodeBehaviors.js b/packages/tko.utils.parser/spec/nodeBehaviors.js
index 5ddd6f0b..6af5bbb1 100644
--- a/packages/tko.utils.parser/spec/nodeBehaviors.js
+++ b/packages/tko.utils.parser/spec/nodeBehaviors.js
@@ -6,7 +6,7 @@ import {
 
 import {
   Parser, Node, Arguments, Identifier
-} from '../index.js';
+} from '../src';
 
 var op = Node.operators
 var operators = Node.operators
diff --git a/packages/tko.utils.parser/spec/parserBehaviors.js b/packages/tko.utils.parser/spec/parserBehaviors.js
index 63dc1e09..d87e9d9b 100644
--- a/packages/tko.utils.parser/spec/parserBehaviors.js
+++ b/packages/tko.utils.parser/spec/parserBehaviors.js
@@ -23,7 +23,7 @@ import {
 
 import {
   Parser
-} from '../index.js';
+} from '../src';
 
 function ctxStub (ctx) {
   return { lookup (v) { return ctx ? ctx[v] : null } }
diff --git a/packages/tko.utils/helpers/jasmine-13-helper.js b/packages/tko.utils/helpers/jasmine-13-helper.js
index 6e60f864..fb733b83 100644
--- a/packages/tko.utils/helpers/jasmine-13-helper.js
+++ b/packages/tko.utils/helpers/jasmine-13-helper.js
@@ -5,7 +5,7 @@
 
 import {
   arrayMap, ieVersion
-} from '../index.js';
+} from '../src';
 
 window.DEBUG = true;
 window.amdRequire = window.require;
diff --git a/packages/tko.utils/spec/arrayEditDetectionBehaviors.js b/packages/tko.utils/spec/arrayEditDetectionBehaviors.js
index bdd35384..c9499d3c 100644
--- a/packages/tko.utils/spec/arrayEditDetectionBehaviors.js
+++ b/packages/tko.utils/spec/arrayEditDetectionBehaviors.js
@@ -1,6 +1,6 @@
 import {
     compareArrays
-} from '../index.js';
+} from '../src';
 
 
 describe('Compare Arrays', function() {
diff --git a/packages/tko.utils/spec/domNodeDisposalBehaviors.js b/packages/tko.utils/spec/domNodeDisposalBehaviors.js
index 0ba6afc4..44e3b4e9 100644
--- a/packages/tko.utils/spec/domNodeDisposalBehaviors.js
+++ b/packages/tko.utils/spec/domNodeDisposalBehaviors.js
@@ -1,7 +1,7 @@
 import {
     addDisposeCallback, removeDisposeCallback, cleanNode, removeNode, options,
     otherNodeCleanerFunctions, cleanjQueryData
-} from '../index';
+} from '../src';
 
 import '../helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.utils/spec/memoizationBehaviors.js b/packages/tko.utils/spec/memoizationBehaviors.js
index a8a3cb6d..1bc1ca77 100644
--- a/packages/tko.utils/spec/memoizationBehaviors.js
+++ b/packages/tko.utils/spec/memoizationBehaviors.js
@@ -1,5 +1,5 @@
 
-import { memoization } from '../index.js'
+import { memoization } from '../src'
 
 
 function parseMemoCommentHtml(commentHtml) {
diff --git a/packages/tko.utils/spec/onErrorBehaviors.js b/packages/tko.utils/spec/onErrorBehaviors.js
index 8e61515e..6ffc336d 100644
--- a/packages/tko.utils/spec/onErrorBehaviors.js
+++ b/packages/tko.utils/spec/onErrorBehaviors.js
@@ -1,6 +1,6 @@
 import {
     options, tasks
-} from '../index.js';
+} from '../src';
 
 
 describe('onError handler', function () {
diff --git a/packages/tko.utils/spec/parseHtmlFragmentBehavior.js b/packages/tko.utils/spec/parseHtmlFragmentBehavior.js
index 799af865..c5d60d57 100644
--- a/packages/tko.utils/spec/parseHtmlFragmentBehavior.js
+++ b/packages/tko.utils/spec/parseHtmlFragmentBehavior.js
@@ -1,7 +1,7 @@
 
 import {
     arrayForEach, parseHtmlFragment
-} from '../index';
+} from '../src';
 
 import '../helpers/jasmine-13-helper.js';
 
diff --git a/packages/tko.utils/spec/taskBehaviors.js b/packages/tko.utils/spec/taskBehaviors.js
index d41dadfb..ffae18e3 100644
--- a/packages/tko.utils/spec/taskBehaviors.js
+++ b/packages/tko.utils/spec/taskBehaviors.js
@@ -1,6 +1,6 @@
 import { useMockForTasks } from '../helpers/jasmine-13-helper.js';
 
-import { tasks, options, ieVersion } from '../index.js';
+import { tasks, options, ieVersion } from '../src';
 
 
 describe('Tasks', function() {
diff --git a/packages/tko.utils/spec/utilsBehaviors.js b/packages/tko.utils/spec/utilsBehaviors.js
index 0bbf06b1..f938c961 100644
--- a/packages/tko.utils/spec/utilsBehaviors.js
+++ b/packages/tko.utils/spec/utilsBehaviors.js
@@ -1,4 +1,4 @@
-import * as utils from '../index.js';
+import * as utils from '../src';
 import '../helpers/jasmine-13-helper.js';
 
 var ko = ko || {};
diff --git a/packages/tko.utils/spec/utilsDomBehaviors.js b/packages/tko.utils/spec/utilsDomBehaviors.js
index 3fd495f4..c3f25892 100644
--- a/packages/tko.utils/spec/utilsDomBehaviors.js
+++ b/packages/tko.utils/spec/utilsDomBehaviors.js
@@ -1,7 +1,7 @@
 import '../helpers/jasmine-13-helper.js';
 
-import * as utils from '../index.js';
-import { registerEventHandler } from '../index.js';
+import * as utils from '../src';
+import { registerEventHandler } from '../src';
 import options from '../src/options.js';
 
 var ko = ko || {};
diff --git a/rollup.config.js b/rollup.config.js
index c608fdd5..1f0347a2 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -4,6 +4,9 @@ import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
 import rollupVisualizer from 'rollup-plugin-visualizer'
 
+console.log('HHHITTTTT')
+process.exit()
+
 const pkg = JSON.parse(fs.readFileSync('package.json'))
 const { LERNA_PACKAGE_NAME, LERNA_ROOT_PATH } = process.env
 const PACKAGE_ROOT_PATH = path.join(LERNA_ROOT_PATH, 'packages', LERNA_PACKAGE_NAME)

From e381b09fc66e03b8e56df85c4a76f7e2fa4a75c0 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 19:42:56 -0500
Subject: [PATCH 08/20] :construction: WIP

---
 .babelrc | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 .babelrc

diff --git a/.babelrc b/.babelrc
new file mode 100644
index 00000000..0c00407e
--- /dev/null
+++ b/.babelrc
@@ -0,0 +1,18 @@
+{
+  "presets": [
+    ["env", {
+      "modules": false
+    }]
+  ],
+  "env": {
+    "test": {
+      "presets": [
+        ["env", {
+          "targets": {
+            "node": true
+          }
+        }]
+      ]
+    }
+  }
+}
\ No newline at end of file

From de87254c721a198d2e45e5e390d9d12014ac86ae Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 20:24:37 -0500
Subject: [PATCH 09/20] Fix tests (kind of)

---
 karma.conf.js                                  | 12 +++---------
 package.json                                   | 10 +++-------
 packages/tko.bind/package.json                 |  3 +++
 packages/tko.bind/spec/crossWindowBehaviors.js |  7 +++----
 packages/tko.lifecycle/package.json            |  3 +++
 packages/tko.utils.component/package.json      |  7 +++++++
 packages/tko.utils.parser/package.json         |  5 +++++
 rollup.config.js                               |  3 ---
 8 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/karma.conf.js b/karma.conf.js
index 7e20b2bd..3cbe6ef4 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -6,7 +6,6 @@ const path = require('path')
 const nodeResolve = require('rollup-plugin-node-resolve')
 const rollupCommonJS = require('rollup-plugin-commonjs')
 const rollupVisualizer = require('rollup-plugin-visualizer')
-// const includePaths = require('rollup-plugin-includepaths')
 
 const pkg = JSON.parse(fs.readFileSync('package.json'))
 
@@ -22,21 +21,17 @@ if (!pkg.karma || !pkg.karma.frameworks) {
 }
 
 const frameworks = pkg.karma.frameworks
-// const browsers = ['Electron']
-const browsers = ['Chrome']
+const browsers = ['Electron']
 
 const files = [
-  // { pattern: 'src/*.js', included: false, watched: true },
   { pattern: 'spec/*.js', watched: false }
 ]
 
 const preprocessors = {
-  // 'src/**/*.js': ['rollup'],
   'spec/**/*.js': ['rollup']
 }
 
 const ROLLUP_CONFIG = {
-  // INCLUDE_PATHS: { paths: [ path.join(root, '../..') ] },
   RESOLVE: {module: true},
   VISUALIZER: { filename: './visual.html' },
   COMMONJS: {}
@@ -56,7 +51,6 @@ const rollupPreprocessor = Object.assign({}, {
   format: 'iife',
   name: pkg.name,
   plugins: [
-    // includePaths(ROLLUP_CONFIG.INCLUDE_PATHS),
     nodeResolve(ROLLUP_CONFIG.RESOLVE),
     rollupVisualizer(ROLLUP_CONFIG.VISUALIZER),
     rollupCommonJS(ROLLUP_CONFIG.COMMONJS)
@@ -80,7 +74,7 @@ module.exports = (config) => {
       show: false,
       fullscreenable: false,
       hasShadow: false
-    }
-    // singleRun: process.argv.includes('--once')
+    },
+    singleRun: process.argv.includes('--once')
   })
 }
diff --git a/package.json b/package.json
index 857b1e48..33e1b489 100644
--- a/package.json
+++ b/package.json
@@ -8,14 +8,11 @@
     "url": "https://github.com/knockout/tko.git"
   },
   "scripts": {
+    "postinstall": "lerna bootstrap --hoist --npm-client yarn",
     "test": "lerna exec --concurrency=1 --loglevel=warn -- karma start ../../karma.conf.js --once",
     "build": "lerna exec --concurrency=1 --loglevel=warn -- rollup -c ../../rollup.config.js",
-    "lint": "standard",
-    "lerna": "lerna bootstrap --hoist --npm-client yarn"
+    "lint": "standard"
   },
-  "files": [
-    "dist/"
-  ],
   "bugs": "https://github.com/knockout/tko/issues",
   "licenses": [
     {
@@ -55,9 +52,8 @@
     "js-yaml": "^3.9.1",
     "karma": "^1.7.0",
     "karma-chai": "^0.1.0",
-    "karma-chrome-launcher": "^2.2.0",
     "karma-electron-launcher": "^0.2.0",
-    "karma-jasmine": "^1.1.0",
+    "karma-jasmine": "^0.1.0",
     "karma-mocha": "^1.3.0",
     "karma-rollup-preprocessor": "^5.0.1",
     "karma-sinon": "^1.0.5",
diff --git a/packages/tko.bind/package.json b/packages/tko.bind/package.json
index 9f4bb4bd..8d93d97d 100644
--- a/packages/tko.bind/package.json
+++ b/packages/tko.bind/package.json
@@ -10,6 +10,9 @@
     "tko.provider": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4"
   },
+  "devDependencies": {
+    "tko.binding.foreach": "4.0.0-alpha4"
+  },
   "files": [
     "dist/"
   ],
diff --git a/packages/tko.bind/spec/crossWindowBehaviors.js b/packages/tko.bind/spec/crossWindowBehaviors.js
index b7d55703..6106efee 100644
--- a/packages/tko.bind/spec/crossWindowBehaviors.js
+++ b/packages/tko.bind/spec/crossWindowBehaviors.js
@@ -1,3 +1,6 @@
+import {
+    applyBindings
+} from '../src';
 
 import {
     cleanNode, options
@@ -7,10 +10,6 @@ import {
     observable
 } from 'tko.observable';
 
-import {
-    applyBindings
-} from 'tko.bind';
-
 import {
     renderTemplate, setTemplateEngine, templateEngine
 } from 'tko.binding.template';
diff --git a/packages/tko.lifecycle/package.json b/packages/tko.lifecycle/package.json
index 29aec353..58fe22c0 100644
--- a/packages/tko.lifecycle/package.json
+++ b/packages/tko.lifecycle/package.json
@@ -3,6 +3,9 @@
     "tko.computed": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4"
   },
+  "devDependencies": {
+    "tko.observable": "4.0.0-alpha4"
+  },
   "files": [
     "dist/"
   ],
diff --git a/packages/tko.utils.component/package.json b/packages/tko.utils.component/package.json
index 4c9e8650..8806ae85 100644
--- a/packages/tko.utils.component/package.json
+++ b/packages/tko.utils.component/package.json
@@ -12,5 +12,12 @@
     "tko.observable": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4"
   },
+  "devDependencies": {
+    "tko.bind": "4.0.0-alpha4",
+    "tko.binding.core": "4.0.0-alpha4",
+    "tko.computed": "4.0.0-alpha4",
+    "tko.provider.multi": "4.0.0-alpha4",
+    "tko.provider.virtual": "4.0.0-alpha4"
+  },
   "karma": {"frameworks":["jasmine"] }
 }
diff --git a/packages/tko.utils.parser/package.json b/packages/tko.utils.parser/package.json
index 8d99247c..4d320569 100644
--- a/packages/tko.utils.parser/package.json
+++ b/packages/tko.utils.parser/package.json
@@ -11,5 +11,10 @@
     "tko.observable": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4"
   },
+  "devDependencies": {
+    "tko.bind": "4.0.0-alpha4",
+    "tko.binding.core": "4.0.0-alpha4",
+    "tko.provider.databind": "4.0.0-alpha4"
+  },
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/rollup.config.js b/rollup.config.js
index 1f0347a2..c608fdd5 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -4,9 +4,6 @@ import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
 import rollupVisualizer from 'rollup-plugin-visualizer'
 
-console.log('HHHITTTTT')
-process.exit()
-
 const pkg = JSON.parse(fs.readFileSync('package.json'))
 const { LERNA_PACKAGE_NAME, LERNA_ROOT_PATH } = process.env
 const PACKAGE_ROOT_PATH = path.join(LERNA_ROOT_PATH, 'packages', LERNA_PACKAGE_NAME)

From 7e88d92f3ee73ca63e33299320b5fe0ce183822b Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 20:54:14 -0500
Subject: [PATCH 10/20] Remove unused deps

---
 package.json | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/package.json b/package.json
index 33e1b489..e0b60db7 100644
--- a/package.json
+++ b/package.json
@@ -35,21 +35,11 @@
       "runs"
     ]
   },
+  "dependencies": {},
   "devDependencies": {
     "chai": "^4.1.0",
-    "colors": "^1.1.2",
     "electron": "^1.6.11",
-    "eslint": "^4.9.0",
-    "eslint-config-standard": "^10.2.1",
-    "eslint-plugin-import": "^2.7.0",
-    "eslint-plugin-node": "^5.2.0",
-    "eslint-plugin-promise": "^3.6.0",
-    "eslint-plugin-standard": "^3.0.1",
-    "gulp": "^3.9.1",
-    "gulp-rename": "^1.2.2",
-    "gulp-replace": "^0.6.1",
     "jquery": "^3.2.1",
-    "js-yaml": "^3.9.1",
     "karma": "^1.7.0",
     "karma-chai": "^0.1.0",
     "karma-electron-launcher": "^0.2.0",
@@ -58,19 +48,13 @@
     "karma-rollup-preprocessor": "^5.0.1",
     "karma-sinon": "^1.0.5",
     "lerna": "^2.0.0",
-    "lodash": "^4.17.4",
     "mocha": "^3.4.2",
     "rollup": "^0.50.0",
-    "rollup-plugin-babel": "^2.7.1",
-    "rollup-plugin-babili": "^3.1.0",
     "rollup-plugin-commonjs": "^8.0.2",
-    "rollup-plugin-includepaths": "^0.2.2",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-replace": "^1.1.1",
-    "rollup-plugin-stub": "^1.2.0",
     "rollup-plugin-visualizer": "^0.3.1",
     "sinon": "^2.4.1",
     "standard": "^10.0.2"
-  },
-  "dependencies": {}
+  }
 }

From 260c420bec85c5539cf9a1f4bc8fa9875f772aaa Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 20:54:26 -0500
Subject: [PATCH 11/20] Remove unused dotfiles

---
 .babelrc  | 18 ------------------
 .eslintrc |  6 ------
 2 files changed, 24 deletions(-)
 delete mode 100644 .babelrc
 delete mode 100644 .eslintrc

diff --git a/.babelrc b/.babelrc
deleted file mode 100644
index 0c00407e..00000000
--- a/.babelrc
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  "presets": [
-    ["env", {
-      "modules": false
-    }]
-  ],
-  "env": {
-    "test": {
-      "presets": [
-        ["env", {
-          "targets": {
-            "node": true
-          }
-        }]
-      ]
-    }
-  }
-}
\ No newline at end of file
diff --git a/.eslintrc b/.eslintrc
deleted file mode 100644
index fe3f7b2d..00000000
--- a/.eslintrc
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "extends": "standard",
-  "parserOptions": {
-    "sourceType": "module"
-  }
-}
\ No newline at end of file

From ea8cc88d08e99bc83125fa45e150c03841e7cf37 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 21:19:50 -0500
Subject: [PATCH 12/20] Transpile to ES3 using TypeScript compiler

---
 package.json                                   |  4 +++-
 packages/tko.bind/package.json                 |  3 ++-
 packages/tko.binding.component/package.json    |  3 ++-
 packages/tko.binding.core/package.json         |  7 +++++--
 packages/tko.binding.foreach/package.json      |  9 +++++++--
 packages/tko.binding.if/package.json           |  7 +++++--
 packages/tko.binding.template/package.json     |  7 +++++--
 packages/tko.computed/package.json             | 18 +++++++++---------
 packages/tko.filter.punches/package.json       |  7 +++++--
 packages/tko.lifecycle/package.json            | 10 +++++++---
 packages/tko.observable/package.json           |  7 +++++--
 packages/tko.provider.attr/package.json        | 10 ++++++++--
 .../tko.provider.bindingString/package.json    |  3 ++-
 packages/tko.provider.component/package.json   |  3 ++-
 packages/tko.provider.databind/package.json    |  3 ++-
 packages/tko.provider.multi/package.json       | 10 ++++++++--
 packages/tko.provider.mustache/package.json    |  3 ++-
 packages/tko.provider.virtual/package.json     |  3 ++-
 packages/tko.provider/package.json             | 10 ++++++++--
 packages/tko.utils.component/package.json      |  5 +++--
 packages/tko.utils.parser/package.json         |  3 ++-
 packages/tko.utils/package.json                |  7 ++++++-
 packages/tko/package.json                      |  5 +++--
 rollup.config.js                               |  6 ++++++
 tsconfig.json                                  | 10 ++++++++++
 25 files changed, 119 insertions(+), 44 deletions(-)
 create mode 100644 tsconfig.json

diff --git a/package.json b/package.json
index e0b60db7..ba9aabb1 100644
--- a/package.json
+++ b/package.json
@@ -53,8 +53,10 @@
     "rollup-plugin-commonjs": "^8.0.2",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-replace": "^1.1.1",
+    "rollup-plugin-typescript": "^0.8.1",
     "rollup-plugin-visualizer": "^0.3.1",
     "sinon": "^2.4.1",
-    "standard": "^10.0.2"
+    "standard": "^10.0.2",
+    "typescript": "^2.5.3"
   }
 }
diff --git a/packages/tko.bind/package.json b/packages/tko.bind/package.json
index 8d93d97d..cd8a2d60 100644
--- a/packages/tko.bind/package.json
+++ b/packages/tko.bind/package.json
@@ -8,7 +8,8 @@
     "tko.lifecycle": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
     "tko.provider": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "devDependencies": {
     "tko.binding.foreach": "4.0.0-alpha4"
diff --git a/packages/tko.binding.component/package.json b/packages/tko.binding.component/package.json
index 977ccf85..69e5eb7f 100644
--- a/packages/tko.binding.component/package.json
+++ b/packages/tko.binding.component/package.json
@@ -10,7 +10,8 @@
     "tko.observable": "4.0.0-alpha4",
     "tko.provider": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4",
-    "tko.utils.component": "4.0.0-alpha4"
+    "tko.utils.component": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "files": [
     "dist/"
diff --git a/packages/tko.binding.core/package.json b/packages/tko.binding.core/package.json
index 9bcab699..c9fb5331 100644
--- a/packages/tko.binding.core/package.json
+++ b/packages/tko.binding.core/package.json
@@ -25,9 +25,12 @@
     "tko.bind": "4.0.0-alpha4",
     "tko.computed": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   }
 }
diff --git a/packages/tko.binding.foreach/package.json b/packages/tko.binding.foreach/package.json
index 9427558a..e80ceaa1 100644
--- a/packages/tko.binding.foreach/package.json
+++ b/packages/tko.binding.foreach/package.json
@@ -29,9 +29,14 @@
     "tko.bind": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
     "tko.provider": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["mocha", "chai", "sinon"]
+    "frameworks": [
+      "mocha",
+      "chai",
+      "sinon"
+    ]
   }
 }
diff --git a/packages/tko.binding.if/package.json b/packages/tko.binding.if/package.json
index e59ad830..3a58d450 100644
--- a/packages/tko.binding.if/package.json
+++ b/packages/tko.binding.if/package.json
@@ -25,9 +25,12 @@
     "tko.bind": "4.0.0-alpha4",
     "tko.computed": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   }
 }
diff --git a/packages/tko.binding.template/package.json b/packages/tko.binding.template/package.json
index 1679be26..ecad13bb 100644
--- a/packages/tko.binding.template/package.json
+++ b/packages/tko.binding.template/package.json
@@ -25,10 +25,13 @@
     "tko.bind": "4.0.0-alpha4",
     "tko.computed": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   },
   "devDependencies": {
     "tko.binding.if": "4.0.0-alpha4"
diff --git a/packages/tko.computed/package.json b/packages/tko.computed/package.json
index 88641513..2e91ae8f 100644
--- a/packages/tko.computed/package.json
+++ b/packages/tko.computed/package.json
@@ -4,11 +4,15 @@
   "description": "TKO Computed Observables",
   "module": "dist/tko.computed.js",
   "files": [
-    "dist/"
+    "dist/",
+    "src/",
+    "index.js",
+    "./*.ya?ml"
   ],
   "dependencies": {
+    "tko.observable": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4",
-    "tko.observable": "4.0.0-alpha4"
+    "tslib": "^1.8.0"
   },
   "repository": {
     "type": "git",
@@ -18,12 +22,6 @@
     "knockout",
     "tko"
   ],
-  "files": [
-    "dist/",
-    "src/",
-    "index.js",
-    "./*.ya?ml"
-  ],
   "author": "Knockout Team",
   "license": "MIT",
   "bugs": {
@@ -31,6 +29,8 @@
   },
   "homepage": "https://github.com/knockout/tko.computed#readme",
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   }
 }
diff --git a/packages/tko.filter.punches/package.json b/packages/tko.filter.punches/package.json
index de0b92b0..be4a382c 100644
--- a/packages/tko.filter.punches/package.json
+++ b/packages/tko.filter.punches/package.json
@@ -25,9 +25,12 @@
   },
   "homepage": "https://github.com/knockout/tko#readme",
   "dependencies": {
-    "tko.observable": "4.0.0-alpha4"
+    "tko.observable": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   }
 }
diff --git a/packages/tko.lifecycle/package.json b/packages/tko.lifecycle/package.json
index 58fe22c0..5b25dae1 100644
--- a/packages/tko.lifecycle/package.json
+++ b/packages/tko.lifecycle/package.json
@@ -1,7 +1,8 @@
 {
   "dependencies": {
     "tko.computed": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "devDependencies": {
     "tko.observable": "4.0.0-alpha4"
@@ -17,6 +18,9 @@
   "author": "Knockout Team",
   "license": "MIT",
   "karma": {
-    "frameworks": ["mocha", "chai"]
+    "frameworks": [
+      "mocha",
+      "chai"
+    ]
   }
-}
\ No newline at end of file
+}
diff --git a/packages/tko.observable/package.json b/packages/tko.observable/package.json
index b57e0c77..a9596a1d 100644
--- a/packages/tko.observable/package.json
+++ b/packages/tko.observable/package.json
@@ -24,9 +24,12 @@
   },
   "homepage": "https://github.com/knockout/tko.observable#readme",
   "dependencies": {
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
   }
 }
diff --git a/packages/tko.provider.attr/package.json b/packages/tko.provider.attr/package.json
index 4820c339..0a6bfe46 100644
--- a/packages/tko.provider.attr/package.json
+++ b/packages/tko.provider.attr/package.json
@@ -8,7 +8,13 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "tko.provider": "4.0.0-alpha4"
+    "tko.provider": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
-  "karma": {"frameworks":["mocha","chai"] }
+  "karma": {
+    "frameworks": [
+      "mocha",
+      "chai"
+    ]
+  }
 }
diff --git a/packages/tko.provider.bindingString/package.json b/packages/tko.provider.bindingString/package.json
index 316d4d5e..013f50b7 100644
--- a/packages/tko.provider.bindingString/package.json
+++ b/packages/tko.provider.bindingString/package.json
@@ -9,7 +9,8 @@
   "license": "MIT",
   "dependencies": {
     "tko.provider": "4.0.0-alpha4",
-    "tko.utils.parser": "4.0.0-alpha4"
+    "tko.utils.parser": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": { "frameworks": ["mocha", "chai"]}
 }
diff --git a/packages/tko.provider.component/package.json b/packages/tko.provider.component/package.json
index cefbd272..342bf7b0 100644
--- a/packages/tko.provider.component/package.json
+++ b/packages/tko.provider.component/package.json
@@ -13,7 +13,8 @@
     "tko.provider": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4",
     "tko.utils.component": "4.0.0-alpha4",
-    "tko.utils.parser": "4.0.0-alpha4"
+    "tko.utils.parser": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {"frameworks": ["jasmine"] }
 }
diff --git a/packages/tko.provider.databind/package.json b/packages/tko.provider.databind/package.json
index 821bdcab..9cc2d752 100644
--- a/packages/tko.provider.databind/package.json
+++ b/packages/tko.provider.databind/package.json
@@ -8,7 +8,8 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "tko.provider.bindingString": "4.0.0-alpha4"
+    "tko.provider.bindingString": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": { "frameworks": ["mocha", "sinon", "chai"] }
 }
diff --git a/packages/tko.provider.multi/package.json b/packages/tko.provider.multi/package.json
index 58c6ccac..eff6c872 100644
--- a/packages/tko.provider.multi/package.json
+++ b/packages/tko.provider.multi/package.json
@@ -8,7 +8,13 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "tko.provider": "4.0.0-alpha4"
+    "tko.provider": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
-  "karma": { "frameworks": ["mocha", "chai"] }
+  "karma": {
+    "frameworks": [
+      "mocha",
+      "chai"
+    ]
+  }
 }
diff --git a/packages/tko.provider.mustache/package.json b/packages/tko.provider.mustache/package.json
index 2552f334..7dc6e20a 100644
--- a/packages/tko.provider.mustache/package.json
+++ b/packages/tko.provider.mustache/package.json
@@ -26,7 +26,8 @@
     "tko.observable": "4.0.0-alpha4",
     "tko.provider": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4",
-    "tko.utils.parser": "4.0.0-alpha4"
+    "tko.utils.parser": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": {
     "frameworks": ["jasmine"]
diff --git a/packages/tko.provider.virtual/package.json b/packages/tko.provider.virtual/package.json
index fccc183a..e76ca8e3 100644
--- a/packages/tko.provider.virtual/package.json
+++ b/packages/tko.provider.virtual/package.json
@@ -10,7 +10,8 @@
   "license": "MIT",
   "dependencies": {
     "tko.utils": "4.0.0-alpha4",
-    "tko.provider.bindingString": "4.0.0-alpha4"
+    "tko.provider.bindingString": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "karma": { "frameworks": ["mocha", "chai"] }
 }
diff --git a/packages/tko.provider/package.json b/packages/tko.provider/package.json
index bf451f7c..7a7faf5b 100644
--- a/packages/tko.provider/package.json
+++ b/packages/tko.provider/package.json
@@ -9,7 +9,13 @@
   "author": "Knockout Team",
   "license": "MIT",
   "dependencies": {
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
-  "karma" : { "frameworks": ["mocha", "chai"] }
+  "karma": {
+    "frameworks": [
+      "mocha",
+      "chai"
+    ]
+  }
 }
diff --git a/packages/tko.utils.component/package.json b/packages/tko.utils.component/package.json
index 8806ae85..b7571893 100644
--- a/packages/tko.utils.component/package.json
+++ b/packages/tko.utils.component/package.json
@@ -10,7 +10,8 @@
   "dependencies": {
     "tko.lifecycle": "4.0.0-alpha4",
     "tko.observable": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "devDependencies": {
     "tko.bind": "4.0.0-alpha4",
@@ -19,5 +20,5 @@
     "tko.provider.multi": "4.0.0-alpha4",
     "tko.provider.virtual": "4.0.0-alpha4"
   },
-  "karma": {"frameworks":["jasmine"] }
+  "karma": { "frameworks": ["jasmine"] }
 }
diff --git a/packages/tko.utils.parser/package.json b/packages/tko.utils.parser/package.json
index 4d320569..894fd840 100644
--- a/packages/tko.utils.parser/package.json
+++ b/packages/tko.utils.parser/package.json
@@ -9,7 +9,8 @@
   "license": "MIT",
   "dependencies": {
     "tko.observable": "4.0.0-alpha4",
-    "tko.utils": "4.0.0-alpha4"
+    "tko.utils": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   },
   "devDependencies": {
     "tko.bind": "4.0.0-alpha4",
diff --git a/packages/tko.utils/package.json b/packages/tko.utils/package.json
index 9b4a51f6..2c7618cf 100644
--- a/packages/tko.utils/package.json
+++ b/packages/tko.utils/package.json
@@ -22,6 +22,11 @@
   },
   "homepage": "https://github.com/knockout/tko.utils.readme",
   "karma": {
-    "frameworks": ["jasmine"]
+    "frameworks": [
+      "jasmine"
+    ]
+  },
+  "dependencies": {
+    "tslib": "^1.8.0"
   }
 }
diff --git a/packages/tko/package.json b/packages/tko/package.json
index 3536fd6a..6e933684 100644
--- a/packages/tko/package.json
+++ b/packages/tko/package.json
@@ -6,7 +6,7 @@
   "repository": "git@github.com:knockout/tko",
   "author": "The Knockout Team",
   "license": "MIT",
-  "dependencies": {
+  "devDependencies": {
     "tko.bind": "4.0.0-alpha4",
     "tko.binding.component": "4.0.0-alpha4",
     "tko.binding.core": "4.0.0-alpha4",
@@ -27,6 +27,7 @@
     "tko.provider.virtual": "4.0.0-alpha4",
     "tko.utils": "4.0.0-alpha4",
     "tko.utils.component": "4.0.0-alpha4",
-    "tko.utils.parser": "4.0.0-alpha4"
+    "tko.utils.parser": "4.0.0-alpha4",
+    "tslib": "^1.8.0"
   }
 }
diff --git a/rollup.config.js b/rollup.config.js
index c608fdd5..2d609519 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -2,6 +2,7 @@ import * as fs from 'fs'
 import * as path from 'path'
 import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
+import typescript from 'rollup-plugin-typescript'
 import rollupVisualizer from 'rollup-plugin-visualizer'
 
 const pkg = JSON.parse(fs.readFileSync('package.json'))
@@ -20,6 +21,11 @@ const CONFIG = {
 }
 
 const plugins = [
+  typescript({
+    include: '**/*.js',
+    exclude: 'node_modules',
+    typescript: require('typescript')
+  }),
   replace(CONFIG.REPLACE),
   nodeResolve(CONFIG.RESOLVE),
   rollupVisualizer(CONFIG.VISUALIZER)
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..d89f648a
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "compileOnSave": false,
+  "compilerOptions": {
+    "target": "ES3",
+    "module": "ES2015",
+    "allowJs": true,
+    "importHelpers": true,
+    "strict": true  
+  }
+}
\ No newline at end of file

From 4de4f074b9b0b3998f53fd069299df2dec5a9627 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 21:55:15 -0500
Subject: [PATCH 13/20] Add minified browser build

---
 package.json     |  1 +
 rollup.config.js | 60 +++++++++++++++++++++++++++++++-----------------
 2 files changed, 40 insertions(+), 21 deletions(-)

diff --git a/package.json b/package.json
index ba9aabb1..13107237 100644
--- a/package.json
+++ b/package.json
@@ -54,6 +54,7 @@
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-replace": "^1.1.1",
     "rollup-plugin-typescript": "^0.8.1",
+    "rollup-plugin-uglify": "^2.0.1",
     "rollup-plugin-visualizer": "^0.3.1",
     "sinon": "^2.4.1",
     "standard": "^10.0.2",
diff --git a/rollup.config.js b/rollup.config.js
index 2d609519..54e26060 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -3,6 +3,7 @@ import * as path from 'path'
 import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
 import typescript from 'rollup-plugin-typescript'
+import uglify from 'rollup-plugin-uglify'
 import rollupVisualizer from 'rollup-plugin-visualizer'
 
 const pkg = JSON.parse(fs.readFileSync('package.json'))
@@ -11,38 +12,55 @@ const PACKAGE_ROOT_PATH = path.join(LERNA_ROOT_PATH, 'packages', LERNA_PACKAGE_N
 const IS_BROWSER_BUNDLE = LERNA_PACKAGE_NAME === 'tko'
 
 const CONFIG = {
+  INPUT: path.join(PACKAGE_ROOT_PATH, 'src/index.js'),
+  OUTPUT: path.join(PACKAGE_ROOT_PATH, 'dist', `${LERNA_PACKAGE_NAME}.js`),
+  VISUALIZER: { filename: 'visual.html' },
+
+  /* Use TypeScript instead of babel for transpilation for IE6 compat, plus it's faster */
+  TYPESCRIPT: {
+    include: '**/*.js',
+    exclude: 'node_modules',
+    typescript: require('typescript')
+  },
+
+  /* tko modules only supported w/ modern JS bundlers (ES2015) */
   EXTERNAL: IS_BROWSER_BUNDLE ? undefined : getTkoModules(),
   FORMAT: IS_BROWSER_BUNDLE ? 'umd' : 'es',
-  INPUT: path.join(PACKAGE_ROOT_PATH, 'src/index.js'),
+  RESOLVE: { module: true },
+  
   /* Replace {{VERSION}} with pkg.json's `version` */
   REPLACE: { delimiters: ['{{', '}}'], VERSION: pkg.version },
-  RESOLVE: { module: true },
-  VISUALIZER: { filename: 'visual.html' }
 }
 
-const plugins = [
-  typescript({
-    include: '**/*.js',
-    exclude: 'node_modules',
-    typescript: require('typescript')
-  }),
+const PLUGINS = [
+  typescript(CONFIG.TYPESCRIPT),
   replace(CONFIG.REPLACE),
   nodeResolve(CONFIG.RESOLVE),
-  rollupVisualizer(CONFIG.VISUALIZER)
+  ...(IS_BROWSER_BUNDLE ? [rollupVisualizer(CONFIG.VISUALIZER)] : [])
 ]
 
-export default {
-  plugins,
-  input: CONFIG.INPUT,
-  external: CONFIG.EXTERNAL,
-  output: {
-    file: path.join(PACKAGE_ROOT_PATH, 'dist', `${LERNA_PACKAGE_NAME}.js`),
-    format: CONFIG.FORMAT,
-    name: LERNA_PACKAGE_NAME
-  },
-  sourcemap: true
-}
+export default [
+  createRollupConfig({ minify: false }),
+  ...(IS_BROWSER_BUNDLE ? [createRollupConfig({ minify: true })] : [])
+]
 
 function getTkoModules () {
   return fs.readdirSync(path.resolve(__dirname, 'packages'))
 }
+
+function createRollupConfig ({ minify }) {
+  return {
+    plugins: [
+      ...PLUGINS,
+      ...(minify ? [uglify()] : [])
+    ],
+    input: CONFIG.INPUT,
+    external: CONFIG.EXTERNAL,
+    output: {
+      file: minify ? CONFIG.OUTPUT.replace('.js', '.min.js') : CONFIG.OUTPUT,
+      format: CONFIG.FORMAT,
+      name: LERNA_PACKAGE_NAME
+    },
+    sourcemap: true
+  }
+}
\ No newline at end of file

From 441e6922c5f9015ced14a9181fc83a870998cd05 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 21:55:39 -0500
Subject: [PATCH 14/20] Missed a files property in tko.computed

---
 packages/tko.computed/package.json | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/packages/tko.computed/package.json b/packages/tko.computed/package.json
index 2e91ae8f..15d3236a 100644
--- a/packages/tko.computed/package.json
+++ b/packages/tko.computed/package.json
@@ -4,10 +4,7 @@
   "description": "TKO Computed Observables",
   "module": "dist/tko.computed.js",
   "files": [
-    "dist/",
-    "src/",
-    "index.js",
-    "./*.ya?ml"
+    "dist/"
   ],
   "dependencies": {
     "tko.observable": "4.0.0-alpha4",

From 09375be32119b055a12588605cfda38cd7ecad64 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 21:56:04 -0500
Subject: [PATCH 15/20] Register build prepublish task

---
 package.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package.json b/package.json
index 13107237..38da2799 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,7 @@
   },
   "scripts": {
     "postinstall": "lerna bootstrap --hoist --npm-client yarn",
+    "prepublish": "npm run build",
     "test": "lerna exec --concurrency=1 --loglevel=warn -- karma start ../../karma.conf.js --once",
     "build": "lerna exec --concurrency=1 --loglevel=warn -- rollup -c ../../rollup.config.js",
     "lint": "standard"

From 7a4a7f96bf461aed581c7e7144af521f2e0901a5 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 22:00:59 -0500
Subject: [PATCH 16/20] Move bower.json to packages/tko

---
 bower.json => packages/tko/bower.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename bower.json => packages/tko/bower.json (92%)

diff --git a/bower.json b/packages/tko/bower.json
similarity index 92%
rename from bower.json
rename to packages/tko/bower.json
index 83c7f813..d290b68f 100644
--- a/bower.json
+++ b/packages/tko/bower.json
@@ -2,7 +2,7 @@
   "name": "knockout",
   "homepage": "http://knockoutjs.com/",
   "description": "Knockout makes it easier to create rich, responsive UIs with JavaScript",
-  "main": "dist/knockout.js",
+  "main": "dist/tko.js",
   "moduleType": [
     "amd",
     "globals",

From 0160d2233cab9b8bafdcc10535a85828a15b080f Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 22:46:52 -0500
Subject: [PATCH 17/20] Add ES6 builds

---
 package.json     |  2 ++
 rollup.config.js | 90 ++++++++++++++++++++++++++++++++++--------------
 2 files changed, 66 insertions(+), 26 deletions(-)

diff --git a/package.json b/package.json
index 38da2799..cefd943f 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,8 @@
     "lerna": "^2.0.0",
     "mocha": "^3.4.2",
     "rollup": "^0.50.0",
+    "rollup-plugin-alias": "^1.3.1",
+    "rollup-plugin-babel-minify": "^3.1.2",
     "rollup-plugin-commonjs": "^8.0.2",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-replace": "^1.1.1",
diff --git a/rollup.config.js b/rollup.config.js
index 54e26060..d92613f6 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,64 +1,102 @@
 import * as fs from 'fs'
 import * as path from 'path'
+import alias from 'rollup-plugin-alias'
+import babelMinify from 'rollup-plugin-babel-minify'
 import nodeResolve from 'rollup-plugin-node-resolve'
 import replace from 'rollup-plugin-replace'
 import typescript from 'rollup-plugin-typescript'
 import uglify from 'rollup-plugin-uglify'
 import rollupVisualizer from 'rollup-plugin-visualizer'
+import * as tsconfig from './tsconfig.json'
+import * as pkg from './package.json'
 
-const pkg = JSON.parse(fs.readFileSync('package.json'))
 const { LERNA_PACKAGE_NAME, LERNA_ROOT_PATH } = process.env
 const PACKAGE_ROOT_PATH = path.join(LERNA_ROOT_PATH, 'packages', LERNA_PACKAGE_NAME)
 const IS_BROWSER_BUNDLE = LERNA_PACKAGE_NAME === 'tko'
-
-const CONFIG = {
-  INPUT: path.join(PACKAGE_ROOT_PATH, 'src/index.js'),
-  OUTPUT: path.join(PACKAGE_ROOT_PATH, 'dist', `${LERNA_PACKAGE_NAME}.js`),
-  VISUALIZER: { filename: 'visual.html' },
-
+const INPUT_FILE = path.join(PACKAGE_ROOT_PATH, 'src/index.js')
+const TKO_MODULES = getTkoModules()
+const PLUGIN_CONFIGS = {
   /* Use TypeScript instead of babel for transpilation for IE6 compat, plus it's faster */
   TYPESCRIPT: {
     include: '**/*.js',
     exclude: 'node_modules',
     typescript: require('typescript')
   },
-
+  
   /* tko modules only supported w/ modern JS bundlers (ES2015) */
-  EXTERNAL: IS_BROWSER_BUNDLE ? undefined : getTkoModules(),
-  FORMAT: IS_BROWSER_BUNDLE ? 'umd' : 'es',
   RESOLVE: { module: true },
   
   /* Replace {{VERSION}} with pkg.json's `version` */
   REPLACE: { delimiters: ['{{', '}}'], VERSION: pkg.version },
+
+  VISUALIZER: { filename: 'visual.html' }
 }
 
-const PLUGINS = [
-  typescript(CONFIG.TYPESCRIPT),
-  replace(CONFIG.REPLACE),
-  nodeResolve(CONFIG.RESOLVE),
-  ...(IS_BROWSER_BUNDLE ? [rollupVisualizer(CONFIG.VISUALIZER)] : [])
+/* Plugins used for all builds */
+const UNIVERSAL_PLUGINS = [
+  replace(PLUGIN_CONFIGS.REPLACE),
+  nodeResolve(PLUGIN_CONFIGS.RESOLVE),
+  rollupVisualizer(PLUGIN_CONFIGS.VISUALIZER)
 ]
 
 export default [
-  createRollupConfig({ minify: false }),
-  ...(IS_BROWSER_BUNDLE ? [createRollupConfig({ minify: true })] : [])
+  /* tko.<module?>.es6.js */
+  createRollupConfig(),
+  /* tko.<module?>.js */
+  createRollupConfig({ transpile: true }),
+  ...(IS_BROWSER_BUNDLE
+    ? [
+      /* tko.es6.min.js */
+      createRollupConfig({ minify: true }),
+      /* tko.min.js */
+      createRollupConfig({ minify: true, transpile: true })
+    ]
+    : []
+  )
 ]
 
 function getTkoModules () {
   return fs.readdirSync(path.resolve(__dirname, 'packages'))
 }
 
-function createRollupConfig ({ minify }) {
+function getTkoES6Aliases () {
+  return TKO_MODULES.reduce((accum, tkoModule) => Object.assign(accum, {
+    [tkoModule]: path.resolve(
+      LERNA_ROOT_PATH,
+      `packages/${tkoModule}/dist/${tkoModule}.es6.js`
+    )
+  }))
+}
+
+function createRollupConfig ({ minify, transpile } = {}) {
+  let filename = path.join(PACKAGE_ROOT_PATH, 'dist', LERNA_PACKAGE_NAME)
+  
+  const plugins = [
+    ...UNIVERSAL_PLUGINS // clone
+  ]
+
+  if (transpile) {
+    plugins.push(typescript(PLUGIN_CONFIGS.TYPESCRIPT))
+  } else {
+    /* must come before resolve plugin */
+    plugins.unshift(alias(getTkoES6Aliases()))
+    filename += '.es6'
+  }
+
+  if (minify) {
+    plugins.push(transpile ? uglify() : babelMinify({ comments: false }))
+    filename += '.min'
+  }
+
+  filename += '.js'
+
   return {
-    plugins: [
-      ...PLUGINS,
-      ...(minify ? [uglify()] : [])
-    ],
-    input: CONFIG.INPUT,
-    external: CONFIG.EXTERNAL,
+    plugins,
+    input: INPUT_FILE,
+    external: IS_BROWSER_BUNDLE ? undefined : TKO_MODULES,
     output: {
-      file: minify ? CONFIG.OUTPUT.replace('.js', '.min.js') : CONFIG.OUTPUT,
-      format: CONFIG.FORMAT,
+      file: filename,
+      format: IS_BROWSER_BUNDLE ? 'umd' : 'es',
       name: LERNA_PACKAGE_NAME
     },
     sourcemap: true

From f82e58f9044ae398055b4e199e030d2a5f995b11 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 22:57:34 -0500
Subject: [PATCH 18/20] Include browser bundle in repo for CDN usage

---
 .gitignore                           |    3 +-
 packages/tko/dist/tko.es6.js         | 8825 ++++++++++++++++++++++++
 packages/tko/dist/tko.es6.js.map     |    1 +
 packages/tko/dist/tko.es6.min.js     |    3 +
 packages/tko/dist/tko.es6.min.js.map |    1 +
 packages/tko/dist/tko.js             | 9306 ++++++++++++++++++++++++++
 packages/tko/dist/tko.js.map         |    1 +
 packages/tko/dist/tko.min.js         |    2 +
 packages/tko/dist/tko.min.js.map     |    1 +
 9 files changed, 18142 insertions(+), 1 deletion(-)
 create mode 100644 packages/tko/dist/tko.es6.js
 create mode 100644 packages/tko/dist/tko.es6.js.map
 create mode 100644 packages/tko/dist/tko.es6.min.js
 create mode 100644 packages/tko/dist/tko.es6.min.js.map
 create mode 100644 packages/tko/dist/tko.js
 create mode 100644 packages/tko/dist/tko.js.map
 create mode 100644 packages/tko/dist/tko.min.js
 create mode 100644 packages/tko/dist/tko.min.js.map

diff --git a/.gitignore b/.gitignore
index a9a32993..b0e15860 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,7 +19,8 @@ node_modules
 # Knockout built files
 _repo
 coverage/
-dist/
+**/dist/*
+!packages/tko/dist/*
 
 yarn.lock
 
diff --git a/packages/tko/dist/tko.es6.js b/packages/tko/dist/tko.es6.js
new file mode 100644
index 00000000..cf8d9582
--- /dev/null
+++ b/packages/tko/dist/tko.es6.js
@@ -0,0 +1,8825 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.tko = factory());
+}(this, (function () { 'use strict';
+
+//
+// Array utilities
+//
+/* eslint no-cond-assign: 0 */
+
+function arrayForEach(array, action) {
+    for (var i = 0, j = array.length; i < j; i++)
+        action(array[i], i);
+}
+
+function arrayIndexOf(array, item) {
+    // IE9
+    if (typeof Array.prototype.indexOf == "function")
+        return Array.prototype.indexOf.call(array, item);
+    for (var i = 0, j = array.length; i < j; i++)
+        if (array[i] === item)
+            return i;
+    return -1;
+}
+
+function arrayFirst(array, predicate, predicateOwner) {
+    for (var i = 0, j = array.length; i < j; i++)
+        if (predicate.call(predicateOwner, array[i], i))
+            return array[i];
+    return null;
+}
+
+function arrayRemoveItem(array, itemToRemove) {
+    var index = arrayIndexOf(array, itemToRemove);
+    if (index > 0) {
+        array.splice(index, 1);
+    }
+    else if (index === 0) {
+        array.shift();
+    }
+}
+
+function arrayGetDistinctValues(array) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++) {
+        if (arrayIndexOf(result, array[i]) < 0)
+            result.push(array[i]);
+    }
+    return result;
+}
+
+function arrayMap(array, mapping) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++)
+        result.push(mapping(array[i], i));
+    return result;
+}
+
+function arrayFilter(array, predicate) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++)
+        if (predicate(array[i], i))
+            result.push(array[i]);
+    return result;
+}
+
+function arrayPushAll(array, valuesToPush) {
+    if (valuesToPush instanceof Array)
+        array.push.apply(array, valuesToPush);
+    else
+        for (var i = 0, j = valuesToPush.length; i < j; i++)
+            array.push(valuesToPush[i]);
+    return array;
+}
+
+function addOrRemoveItem(array, value, included) {
+    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);
+    if (existingEntryIndex < 0) {
+        if (included)
+            array.push(value);
+    } else {
+        if (!included)
+            array.splice(existingEntryIndex, 1);
+    }
+}
+
+
+function makeArray(arrayLikeObject) {
+    var result = [];
+    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
+        result.push(arrayLikeObject[i]);
+    }
+    return result;
+}
+
+
+function range(min, max) {
+    min = typeof min === 'function' ? min() : min;
+    max = typeof max === 'function' ? max() : max;
+    var result = [];
+    for (var i = min; i <= max; i++)
+        result.push(i);
+    return result;
+}
+
+// Go through the items that have been added and deleted and try to find matches between them.
+function findMovesInArrayComparison(left, right, limitFailedCompares) {
+    if (left.length && right.length) {
+        var failedCompares, l, r, leftItem, rightItem;
+        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
+            for (r = 0; rightItem = right[r]; ++r) {
+                if (leftItem['value'] === rightItem['value']) {
+                    leftItem['moved'] = rightItem['index'];
+                    rightItem['moved'] = leftItem['index'];
+                    right.splice(r, 1);         // This item is marked as moved; so remove it from right list
+                    failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures
+                    break;
+                }
+            }
+            failedCompares += r;
+        }
+    }
+}
+
+
+
+var statusNotInOld = 'added';
+var statusNotInNew = 'deleted';
+
+    // Simple calculation based on Levenshtein distance.
+function compareArrays(oldArray, newArray, options) {
+    // For backward compatibility, if the third arg is actually a bool, interpret
+    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
+    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
+    oldArray = oldArray || [];
+    newArray = newArray || [];
+
+    if (oldArray.length < newArray.length)
+        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
+    else
+        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
+}
+
+
+function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
+    var myMin = Math.min,
+        myMax = Math.max,
+        editDistanceMatrix = [],
+        smlIndex, smlIndexMax = smlArray.length,
+        bigIndex, bigIndexMax = bigArray.length,
+        compareRange = (bigIndexMax - smlIndexMax) || 1,
+        maxDistance = smlIndexMax + bigIndexMax + 1,
+        thisRow, lastRow,
+        bigIndexMaxForRow, bigIndexMinForRow;
+
+    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
+        lastRow = thisRow;
+        editDistanceMatrix.push(thisRow = []);
+        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
+        bigIndexMinForRow = myMax(0, smlIndex - 1);
+        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
+            if (!bigIndex)
+                thisRow[bigIndex] = smlIndex + 1;
+            else if (!smlIndex)  // Top row - transform empty array into new array via additions
+                thisRow[bigIndex] = bigIndex + 1;
+            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
+                thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)
+            else {
+                var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)
+                var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)
+                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
+            }
+        }
+    }
+
+    var editScript = [], meMinusOne, notInSml = [], notInBig = [];
+    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
+        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
+        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {
+            notInSml.push(editScript[editScript.length] = {     // added
+                'status': statusNotInSml,
+                'value': bigArray[--bigIndex],
+                'index': bigIndex });
+        } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
+            notInBig.push(editScript[editScript.length] = {     // deleted
+                'status': statusNotInBig,
+                'value': smlArray[--smlIndex],
+                'index': smlIndex });
+        } else {
+            --bigIndex;
+            --smlIndex;
+            if (!options['sparse']) {
+                editScript.push({
+                    'status': "retained",
+                    'value': bigArray[bigIndex] });
+            }
+        }
+    }
+
+    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
+    // smlIndexMax keeps the time complexity of this algorithm linear.
+    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
+
+    return editScript.reverse();
+}
+
+//
+// This becomes ko.options
+// --
+//
+// This is the root 'options', which must be extended by others.
+
+var _global;
+
+try { _global = window; } catch (e) { _global = global; }
+
+var options = {
+  deferUpdates: false,
+
+  useOnlyNativeEvents: false,
+
+  protoProperty: '__ko_proto__',
+
+    // Modify the default attribute from `data-bind`.
+  defaultBindingAttribute: 'data-bind',
+
+    // Enable/disable <!-- ko binding: ... -> style bindings
+  allowVirtualElements: true,
+
+    // Global variables that can be accessed from bindings.
+  bindingGlobals: _global,
+
+    // An instance of the binding provider.
+  bindingProviderInstance: null,
+
+    // jQuery will be automatically set to _global.jQuery in applyBindings
+    // if it is (strictly equal to) undefined.  Set it to false or null to
+    // disable automatically setting jQuery.
+  jQuery: _global && _global.jQuery,
+
+  Promise: _global && _global.Promise,
+
+  taskScheduler: null,
+
+  debug: false,
+
+  global: _global,
+  document: _global.document,
+
+    // Filters for bindings
+    //   data-bind="expression | filter_1 | filter_2"
+  filters: {},
+
+  onError: function (e) { throw e },
+
+  set: function (name, value) {
+    options[name] = value;
+  }
+};
+
+Object.defineProperty(options, '$', {
+  get: function () { return options.jQuery }
+});
+
+//
+// Error handling
+// ---
+//
+// The default onError handler is to re-throw.
+function catchFunctionErrors(delegate) {
+    return options.onError ? function () {
+        try {
+            return delegate.apply(this, arguments);
+        } catch (e) {
+            options.onError(e);
+        }
+    } : delegate;
+}
+
+function deferError(error) {
+    safeSetTimeout(function () { options.onError(error); }, 0);
+}
+
+
+function safeSetTimeout(handler, timeout) {
+    return setTimeout(catchFunctionErrors(handler), timeout);
+}
+
+//
+// Asynchronous functionality
+// ---
+function throttle(callback, timeout) {
+    var timeoutInstance;
+    return function () {
+        if (!timeoutInstance) {
+            timeoutInstance = safeSetTimeout(function () {
+                timeoutInstance = undefined;
+                callback();
+            }, timeout);
+        }
+    };
+}
+
+function debounce(callback, timeout) {
+    var timeoutInstance;
+    return function () {
+        clearTimeout(timeoutInstance);
+        timeoutInstance = safeSetTimeout(callback, timeout);
+    };
+}
+
+//
+// Detection and Workarounds for Internet Explorer
+//
+// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
+// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
+// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
+// If there is a future need to detect specific versions of IE10+, we will amend this.
+var ieVersion = options.document && (function () {
+  var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');
+
+    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
+  while (
+        div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
+        iElems[0]
+    ) {}
+  return version > 4 ? version : undefined
+}());
+
+var isIe6 = ieVersion === 6;
+var isIe7 = ieVersion === 7;
+
+//
+// Object functions
+//
+
+function extend(target, source) {
+    if (source) {
+        for(var prop in source) {
+            if(source.hasOwnProperty(prop)) {
+                target[prop] = source[prop];
+            }
+        }
+    }
+    return target;
+}
+
+function objectForEach(obj, action) {
+    for (var prop in obj) {
+        if (obj.hasOwnProperty(prop)) {
+            action(prop, obj[prop]);
+        }
+    }
+}
+
+
+function objectMap(source, mapping) {
+    if (!source)
+        return source;
+    var target = {};
+    for (var prop in source) {
+        if (source.hasOwnProperty(prop)) {
+            target[prop] = mapping(source[prop], prop, source);
+        }
+    }
+    return target;
+}
+
+
+function getObjectOwnProperty(obj, propName) {
+    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;
+}
+
+
+function clonePlainObjectDeep(obj, seen) {
+    if (!seen) { seen = []; }
+
+    if (!obj || typeof obj !== 'object'
+        || obj.constructor !== Object
+        || seen.indexOf(obj) !== -1) {
+        return obj;
+    }
+
+    // Anything that makes it below is a plain object that has not yet
+    // been seen/cloned.
+    seen.push(obj);
+
+    var result = {};
+    for (var prop in obj) {
+        if (obj.hasOwnProperty(prop)) {
+            result[prop] = clonePlainObjectDeep(obj[prop], seen);
+        }
+    }
+    return result;
+}
+
+//
+// Prototype Functions
+//
+var protoProperty = options.protoProperty;
+
+var canSetPrototype = ({ __proto__: [] } instanceof Array);
+
+function setPrototypeOf(obj, proto) {
+    obj.__proto__ = proto;
+    return obj;
+}
+
+var setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;
+
+function hasPrototype(instance, prototype) {
+    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;
+    if (instance[protoProperty] === prototype) return true;
+    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
+}
+
+//
+// String (and JSON)
+//
+
+
+function stringTrim (string) {
+    return string === null || string === undefined ? '' :
+        string.trim ?
+            string.trim() :
+            string.toString().replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
+}
+
+
+function stringStartsWith (string, startsWith) {
+    string = string || "";
+    if (startsWith.length > string.length)
+        return false;
+    return string.substring(0, startsWith.length) === startsWith;
+}
+
+
+function parseJson (jsonString) {
+    if (typeof jsonString == "string") {
+        jsonString = stringTrim(jsonString);
+        if (jsonString) {
+            if (JSON && JSON.parse) // Use native parsing where available
+                return JSON.parse(jsonString);
+            return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
+        }
+    }
+    return null;
+}
+
+
+function stringifyJson (data, replacer, space) {   // replacer and space are optional
+    if (!JSON || !JSON.stringify)
+        throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
+    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);
+}
+
+//
+// ES6 Symbols
+//
+
+var useSymbols = typeof Symbol === 'function';
+
+function createSymbolOrString(identifier) {
+    return useSymbols ? Symbol(identifier) : identifier;
+}
+
+//
+// DOM - CSS
+//
+
+// For details on the pattern for changing node classes
+// see: https://github.com/knockout/knockout/issues/1597
+var cssClassNameRegex = /\S+/g;
+
+
+function toggleDomNodeCssClass(node, classNames, shouldHaveClass) {
+    var addOrRemoveFn;
+    if (!classNames) { return; }
+    if (typeof node.classList === 'object') {
+        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];
+        arrayForEach(classNames.match(cssClassNameRegex), function(className) {
+            addOrRemoveFn.call(node.classList, className);
+        });
+    } else if (typeof node.className['baseVal'] === 'string') {
+        // SVG tag .classNames is an SVGAnimatedString instance
+        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);
+    } else {
+        // node.className ought to be a string.
+        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);
+    }
+}
+
+
+function toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {
+    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.
+    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];
+    arrayForEach(classNames.match(cssClassNameRegex), function(className) {
+        addOrRemoveItem(currentClassNames, className, shouldHaveClass);
+    });
+    obj[prop] = currentClassNames.join(" ");
+}
+
+//
+// jQuery
+//
+// TODO: deprecate in favour of options.$
+
+var jQueryInstance = options.global && options.global.jQuery;
+
+function jQuerySetInstance(jquery) {
+    options.jQuery = jQueryInstance = jquery;
+}
+
+//
+// Information about the DOM
+//
+function domNodeIsContainedBy (node, containedByNode) {
+    if (node === containedByNode)
+        return true;
+    if (node.nodeType === 11)
+        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8
+    if (containedByNode.contains)
+        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);
+    if (containedByNode.compareDocumentPosition)
+        return (containedByNode.compareDocumentPosition(node) & 16) == 16;
+    while (node && node != containedByNode) {
+        node = node.parentNode;
+    }
+    return !!node;
+}
+
+function domNodeIsAttachedToDocument (node) {
+    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);
+}
+
+function anyDomNodeIsAttachedToDocument(nodes) {
+    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);
+}
+
+function tagNameLower(element) {
+    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
+    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
+    // we don't need to do the .toLowerCase() as it will always be lower case anyway.
+    return element && element.tagName && element.tagName.toLowerCase();
+}
+
+function isDomElement(obj) {
+    if (window.HTMLElement) {
+        return obj instanceof HTMLElement;
+    } else {
+        return obj && obj.tagName && obj.nodeType === 1;
+    }
+}
+
+function isDocumentFragment(obj) {
+    if (window.DocumentFragment) {
+        return obj instanceof DocumentFragment;
+    } else {
+        return obj && obj.nodeType === 11;
+    }
+}
+
+//
+// DOM node data
+//
+//
+var dataStoreKeyExpandoPropertyName = "__ko__data" + new Date();
+var dataStore;
+var uniqueId = 0;
+var get;
+var set;
+var clear;
+
+/**
+ * --- Legacy getter/setter (may cause memory leaks) ---
+ */
+function getAll(node, createIfNotFound) {
+    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
+    if (!hasExistingDataStore) {
+        if (!createIfNotFound)
+            return undefined;
+        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
+        dataStore[dataStoreKey] = {};
+    }
+    return dataStore[dataStoreKey];
+}
+
+function legacyGet(node, key) {
+    var allDataForNode = getAll(node, false);
+    return allDataForNode === undefined ? undefined : allDataForNode[key];
+}
+
+function legacySet(node, key, value) {
+    if (value === undefined) {
+        // Make sure we don't actually create a new domData key if we are actually deleting a value
+        if (getAll(node, false) === undefined)
+            return;
+    }
+    var allDataForNode = getAll(node, true);
+    allDataForNode[key] = value;
+}
+
+function legacyClear(node) {
+    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+    if (dataStoreKey) {
+        delete dataStore[dataStoreKey];
+        node[dataStoreKeyExpandoPropertyName] = null;
+        return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
+    }
+    return false;
+}
+
+/**
+ * WeakMap get/set/clear
+ */
+
+function wmGet(node, key) {
+    return (dataStore.get(node) || {})[key];
+}
+
+function wmSet(node, key, value) {
+    var dataForNode;
+    if (dataStore.has(node)) {
+        dataForNode = dataStore.get(node);
+    } else {
+        dataForNode = {};
+        dataStore.set(node, dataForNode);
+    }
+    dataForNode[key] = value;
+}
+
+function wmClear (node) {
+  return dataStore.delete(node)
+}
+
+
+if ('WeakMap' in options.global) {
+    dataStore = new WeakMap();
+    get = wmGet;
+    set = wmSet;
+    clear = wmClear;
+} else {
+    dataStore = {};
+    get = legacyGet;
+    set = legacySet;
+    clear = legacyClear;
+}
+
+
+
+/**
+ * Create a unique key-string identifier.
+ * FIXME: This should be deprecated.
+ */
+function nextKey() {
+    return (uniqueId++) + dataStoreKeyExpandoPropertyName;
+}
+
+
+
+
+
+var data = Object.freeze({
+	nextKey: nextKey,
+	get get () { return get; },
+	get set () { return set; },
+	get clear () { return clear; }
+});
+
+//
+// DOM node disposal
+//
+/* eslint no-cond-assign: 0 */
+var domDataKey = nextKey();
+// Node types:
+// 1: Element
+// 8: Comment
+// 9: Document
+var cleanableNodeTypes = { 1: true, 8: true, 9: true };
+var cleanableNodeTypesWithDescendants = { 1: true, 9: true };
+
+function getDisposeCallbacksCollection(node, createIfNotFound) {
+    var allDisposeCallbacks = get(node, domDataKey);
+    if ((allDisposeCallbacks === undefined) && createIfNotFound) {
+        allDisposeCallbacks = [];
+        set(node, domDataKey, allDisposeCallbacks);
+    }
+    return allDisposeCallbacks;
+}
+function destroyCallbacksCollection(node) {
+    set(node, domDataKey, undefined);
+}
+
+function cleanSingleNode(node) {
+    // Run all the dispose callbacks
+    var callbacks = getDisposeCallbacksCollection(node, false);
+    if (callbacks) {
+        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
+        for (var i = 0; i < callbacks.length; i++)
+            callbacks[i](node);
+    }
+
+    // Erase the DOM data
+    clear(node);
+
+    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)
+    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {
+        otherNodeCleanerFunctions[i](node);
+    }
+
+    // Clear any immediate-child comment nodes, as these wouldn't have been found by
+    // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
+    if (cleanableNodeTypesWithDescendants[node.nodeType])
+        cleanImmediateCommentTypeChildren(node);
+}
+
+function cleanImmediateCommentTypeChildren(nodeWithChildren) {
+    var child, nextChild = nodeWithChildren.firstChild;
+    while (child = nextChild) {
+        nextChild = child.nextSibling;
+        if (child.nodeType === 8)
+            cleanSingleNode(child);
+    }
+}
+
+// Exports
+function addDisposeCallback(node, callback) {
+    if (typeof callback != "function")
+        throw new Error("Callback must be a function");
+    getDisposeCallbacksCollection(node, true).push(callback);
+}
+
+function removeDisposeCallback(node, callback) {
+    var callbacksCollection = getDisposeCallbacksCollection(node, false);
+    if (callbacksCollection) {
+        arrayRemoveItem(callbacksCollection, callback);
+        if (callbacksCollection.length == 0)
+            destroyCallbacksCollection(node);
+    }
+}
+
+function cleanNode(node) {
+    // First clean this node, where applicable
+    if (cleanableNodeTypes[node.nodeType]) {
+        cleanSingleNode(node);
+
+        // ... then its descendants, where applicable
+        if (cleanableNodeTypesWithDescendants[node.nodeType]) {
+            // Clone the descendants list in case it changes during iteration
+            var descendants = [];
+            arrayPushAll(descendants, node.getElementsByTagName("*"));
+            for (var i = 0, j = descendants.length; i < j; i++)
+                cleanSingleNode(descendants[i]);
+        }
+    }
+    return node;
+}
+
+function removeNode(node) {
+    cleanNode(node);
+    if (node.parentNode)
+        node.parentNode.removeChild(node);
+}
+
+
+// Expose supplemental node cleaning functions.
+var otherNodeCleanerFunctions = [];
+
+
+// Special support for jQuery here because it's so commonly used.
+// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
+// so notify it to tear down any resources associated with the node & descendants here.
+function cleanjQueryData(node) {
+    var jQueryCleanNodeFn = jQueryInstance
+        ? jQueryInstance.cleanData : null;
+
+    if (jQueryCleanNodeFn) {
+        jQueryCleanNodeFn([node]);
+    }
+}
+
+
+otherNodeCleanerFunctions.push(cleanjQueryData);
+
+//
+// DOM Events
+//
+
+// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)
+var knownEvents = {};
+var knownEventTypesByEventName = {};
+
+var keyEventTypeName = (options.global.navigator && /Firefox\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';
+
+knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
+
+knownEvents['MouseEvents'] = [
+    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',
+    'mouseout', 'mouseenter', 'mouseleave'];
+
+
+objectForEach(knownEvents, function(eventType, knownEventsForType) {
+    if (knownEventsForType.length) {
+        for (var i = 0, j = knownEventsForType.length; i < j; i++)
+            knownEventTypesByEventName[knownEventsForType[i]] = eventType;
+    }
+});
+
+
+function isClickOnCheckableElement(element, eventType) {
+    if ((tagNameLower(element) !== "input") || !element.type) return false;
+    if (eventType.toLowerCase() != "click") return false;
+    var inputType = element.type;
+    return (inputType == "checkbox") || (inputType == "radio");
+}
+
+
+// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
+var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };
+
+function registerEventHandler(element, eventType, handler) {
+    var wrappedHandler = catchFunctionErrors(handler);
+
+    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
+    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {
+        jQueryInstance(element).bind(eventType, wrappedHandler);
+    } else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
+        element.addEventListener(eventType, wrappedHandler, false);
+    else if (typeof element.attachEvent !== "undefined") {
+        var attachEventHandler = function (event) { wrappedHandler.call(element, event); },
+            attachEventName = "on" + eventType;
+        element.attachEvent(attachEventName, attachEventHandler);
+
+        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)
+        // so to avoid leaks, we have to remove them manually. See bug #856
+        addDisposeCallback(element, function() {
+            element.detachEvent(attachEventName, attachEventHandler);
+        });
+    } else
+        throw new Error("Browser doesn't support addEventListener or attachEvent");
+}
+
+function triggerEvent(element, eventType) {
+    if (!(element && element.nodeType))
+        throw new Error("element must be a DOM node when calling triggerEvent");
+
+    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the
+    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)
+    // IE doesn't change the checked state when you trigger the click event using "fireEvent".
+    // In both cases, we'll use the click method instead.
+    var useClickWorkaround = isClickOnCheckableElement(element, eventType);
+
+    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {
+        jQueryInstance(element).trigger(eventType);
+    } else if (typeof document.createEvent == "function") {
+        if (typeof element.dispatchEvent == "function") {
+            var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
+            var event = document.createEvent(eventCategory);
+            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
+            element.dispatchEvent(event);
+        }
+        else
+            throw new Error("The supplied element doesn't support dispatchEvent");
+    } else if (useClickWorkaround && element.click) {
+        element.click();
+    } else if (typeof element.fireEvent != "undefined") {
+        element.fireEvent("on" + eventType);
+    } else {
+        throw new Error("Browser doesn't support triggering events");
+    }
+}
+
+//
+//  DOM node manipulation
+//
+function fixUpContinuousNodeArray(continuousNodeArray, parentNode) {
+    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile
+    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that
+    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
+    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
+    // So, this function translates the old "map" output array into its best guess of the set of current DOM nodes.
+    //
+    // Rules:
+    //   [A] Any leading nodes that have been removed should be ignored
+    //       These most likely correspond to memoization nodes that were already removed during binding
+    //       See https://github.com/knockout/knockout/pull/440
+    //   [B] Any trailing nodes that have been remove should be ignored
+    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]
+    //       See https://github.com/knockout/knockout/pull/1903
+    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,
+    //       and include any nodes that have been inserted among the previous collection
+
+    if (continuousNodeArray.length) {
+        // The parent node can be a virtual element; so get the real parent node
+        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;
+
+        // Rule [A]
+        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)
+            continuousNodeArray.splice(0, 1);
+
+        // Rule [B]
+        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)
+            continuousNodeArray.length--;
+
+        // Rule [C]
+        if (continuousNodeArray.length > 1) {
+            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];
+            // Replace with the actual new continuous node set
+            continuousNodeArray.length = 0;
+            while (current !== last) {
+                continuousNodeArray.push(current);
+                current = current.nextSibling;
+            }
+            continuousNodeArray.push(last);
+        }
+    }
+    return continuousNodeArray;
+}
+
+function setOptionNodeSelectionState (optionNode, isSelected) {
+    // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
+    if (ieVersion < 7)
+        optionNode.setAttribute("selected", isSelected);
+    else
+        optionNode.selected = isSelected;
+}
+
+
+function forceRefresh(node) {
+    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
+    if (ieVersion >= 9) {
+        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
+        var elem = node.nodeType == 1 ? node : node.parentNode;
+        if (elem.style)
+            elem.style.zoom = elem.style.zoom;
+    }
+}
+
+function ensureSelectElementIsRenderedCorrectly(selectElement) {
+    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.
+    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
+    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)
+    if (ieVersion) {
+        var originalWidth = selectElement.style.width;
+        selectElement.style.width = 0;
+        selectElement.style.width = originalWidth;
+    }
+}
+
+/* eslint no-cond-assign: 0 */
+//
+// Virtual Elements
+//
+//
+// "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes
+// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).
+// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state
+// of that virtual hierarchy
+//
+// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)
+// without having to scatter special cases all over the binding and templating code.
+
+// IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)
+// but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property.
+// So, use node.text where available, and node.nodeValue elsewhere
+var commentNodesHaveTextProperty = options.document && options.document.createComment("test").text === "<!--test-->";
+
+var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
+var endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
+var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
+
+function isStartComment(node) {
+    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
+}
+
+function isEndComment(node) {
+    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
+}
+
+function getVirtualChildren(startComment, allowUnbalanced) {
+    var currentNode = startComment;
+    var depth = 1;
+    var children = [];
+    while (currentNode = currentNode.nextSibling) {
+        if (isEndComment(currentNode)) {
+            depth--;
+            if (depth === 0)
+                return children;
+        }
+
+        children.push(currentNode);
+
+        if (isStartComment(currentNode))
+            depth++;
+    }
+    if (!allowUnbalanced)
+        throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
+    return null;
+}
+
+function getMatchingEndComment(startComment, allowUnbalanced) {
+    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
+    if (allVirtualChildren) {
+        if (allVirtualChildren.length > 0)
+            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
+        return startComment.nextSibling;
+    } else
+        return null; // Must have no matching end comment, and allowUnbalanced is true
+}
+
+function getUnbalancedChildTags(node) {
+    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
+    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
+    var childNode = node.firstChild, captureRemaining = null;
+    if (childNode) {
+        do {
+            if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes
+                captureRemaining.push(childNode);
+            else if (isStartComment(childNode)) {
+                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
+                if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set
+                    childNode = matchingEndComment;
+                else
+                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
+            } else if (isEndComment(childNode)) {
+                captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
+            }
+        } while (childNode = childNode.nextSibling);
+    }
+    return captureRemaining;
+}
+
+var allowedBindings = {};
+var hasBindingValue = isStartComment;
+
+function childNodes(node) {
+    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
+}
+
+function emptyNode(node) {
+    if (!isStartComment(node))
+        emptyDomNode(node);
+    else {
+        var virtualChildren = childNodes(node);
+        for (var i = 0, j = virtualChildren.length; i < j; i++)
+            removeNode(virtualChildren[i]);
+    }
+}
+
+function setDomNodeChildren$1(node, childNodes) {
+    if (!isStartComment(node))
+        setDomNodeChildren(node, childNodes);
+    else {
+        emptyNode(node);
+        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
+        for (var i = 0, j = childNodes.length; i < j; i++)
+            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
+    }
+}
+
+function prepend(containerNode, nodeToPrepend) {
+    if (!isStartComment(containerNode)) {
+        if (containerNode.firstChild)
+            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
+        else
+            containerNode.appendChild(nodeToPrepend);
+    } else {
+        // Start comments must always have a parent and at least one following sibling (the end comment)
+        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
+    }
+}
+
+function insertAfter(containerNode, nodeToInsert, insertAfterNode) {
+    if (!insertAfterNode) {
+        prepend(containerNode, nodeToInsert);
+    } else if (!isStartComment(containerNode)) {
+        // Insert after insertion point
+        if (insertAfterNode.nextSibling)
+            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+        else
+            containerNode.appendChild(nodeToInsert);
+    } else {
+        // Children of start comments must always have a parent and at least one following sibling (the end comment)
+        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+    }
+}
+
+function firstChild(node) {
+    if (!isStartComment(node)) {
+        return node.firstChild;
+    }
+    if (!node.nextSibling || isEndComment(node.nextSibling)) {
+        return null;
+    }
+    return node.nextSibling;
+}
+
+
+function lastChild(node) {
+    var nextChild = firstChild(node),
+        lastChildNode;
+
+    do {
+        lastChildNode = nextChild;
+    } while (nextChild = nextSibling(nextChild));
+
+    return lastChildNode;
+}
+
+function nextSibling(node) {
+    if (isStartComment(node))
+        node = getMatchingEndComment(node);
+    if (node.nextSibling && isEndComment(node.nextSibling))
+        return null;
+    return node.nextSibling;
+}
+
+function previousSibling(node) {
+    var depth = 0;
+    do {
+        if (node.nodeType === 8) {
+            if (isStartComment(node)) {
+                if (--depth === 0) {
+                    return node;
+                }
+            } else if (isEndComment(node)) {
+                depth++;
+            }
+        } else {
+            if (depth === 0) { return node; }
+        }
+    } while (node = node.previousSibling);
+    return;
+}
+
+function virtualNodeBindingValue(node) {
+    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
+    return regexMatch ? regexMatch[1] : null;
+}
+
+function normaliseVirtualElementDomStructure(elementVerified) {
+    // Workaround for https://github.com/SteveSanderson/knockout/issues/155
+    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
+    // that are direct descendants of <ul> into the preceding <li>)
+    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])
+        return;
+
+    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
+    // must be intended to appear *after* that child, so move them there.
+    var childNode = elementVerified.firstChild;
+    if (childNode) {
+        do {
+            if (childNode.nodeType === 1) {
+                var unbalancedTags = getUnbalancedChildTags(childNode);
+                if (unbalancedTags) {
+                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
+                    var nodeToInsertBefore = childNode.nextSibling;
+                    for (var i = 0; i < unbalancedTags.length; i++) {
+                        if (nodeToInsertBefore)
+                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
+                        else
+                            elementVerified.appendChild(unbalancedTags[i]);
+                    }
+                }
+            }
+        } while (childNode = childNode.nextSibling);
+    }
+}
+
+
+var virtualElements = Object.freeze({
+	startCommentRegex: startCommentRegex,
+	endCommentRegex: endCommentRegex,
+	isStartComment: isStartComment,
+	isEndComment: isEndComment,
+	getVirtualChildren: getVirtualChildren,
+	allowedBindings: allowedBindings,
+	hasBindingValue: hasBindingValue,
+	childNodes: childNodes,
+	emptyNode: emptyNode,
+	setDomNodeChildren: setDomNodeChildren$1,
+	prepend: prepend,
+	insertAfter: insertAfter,
+	firstChild: firstChild,
+	lastChild: lastChild,
+	nextSibling: nextSibling,
+	previousSibling: previousSibling,
+	virtualNodeBindingValue: virtualNodeBindingValue,
+	normaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure
+});
+
+//
+// DOM manipulation
+//
+/* eslint no-empty: 0 */
+function moveCleanedNodesToContainerElement(nodes) {
+    // Ensure it's a real array, as we're about to reparent the nodes and
+    // we don't want the underlying collection to change while we're doing that.
+    var nodesArray = makeArray(nodes);
+    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;
+
+    var container = templateDocument.createElement('div');
+    for (var i = 0, j = nodesArray.length; i < j; i++) {
+        container.appendChild(cleanNode(nodesArray[i]));
+    }
+    return container;
+}
+
+function cloneNodes (nodesArray, shouldCleanNodes) {
+    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
+        var clonedNode = nodesArray[i].cloneNode(true);
+        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);
+    }
+    return newNodesArray;
+}
+
+function setDomNodeChildren (domNode, childNodes$$1) {
+    emptyDomNode(domNode);
+    if (childNodes$$1) {
+        for (var i = 0, j = childNodes$$1.length; i < j; i++)
+            domNode.appendChild(childNodes$$1[i]);
+    }
+}
+
+function replaceDomNodes (nodeToReplaceOrNodeArray, newNodesArray) {
+    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
+    if (nodesToReplaceArray.length > 0) {
+        var insertionPoint = nodesToReplaceArray[0];
+        var parent = insertionPoint.parentNode;
+        for (var i = 0, j = newNodesArray.length; i < j; i++)
+            parent.insertBefore(newNodesArray[i], insertionPoint);
+        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {
+            removeNode(nodesToReplaceArray[i]);
+        }
+    }
+}
+
+function setElementName(element, name) {
+    element.name = name;
+
+    // Workaround IE 6/7 issue
+    // - https://github.com/SteveSanderson/knockout/issues/197
+    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
+    if (ieVersion <= 7) {
+        try {
+            element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
+        }
+        catch(e) {} // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
+    }
+}
+
+function setTextContent(element, textContent) {
+    var value = typeof textContent === 'function' ? textContent() : textContent;
+    if ((value === null) || (value === undefined))
+        value = "";
+
+    // We need there to be exactly one child: a text node.
+    // If there are no children, more than one, or if it's not a text node,
+    // we'll clear everything and create a single text node.
+    var innerTextNode = firstChild(element);
+    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {
+        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);
+    } else {
+        innerTextNode.data = value;
+    }
+
+    forceRefresh(element);
+}
+
+function emptyDomNode (domNode) {
+    while (domNode.firstChild) {
+        removeNode(domNode.firstChild);
+    }
+}
+
+//
+// HTML-based manipulation
+//
+var none = [0, "", ""];
+var table = [1, "<table>", "</table>"];
+var tbody = [2, "<table><tbody>", "</tbody></table>"];
+var colgroup = [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>"];
+var tr = [3, "<table><tbody><tr>", "</tr></tbody></table>"];
+var select = [1, "<select multiple='multiple'>", "</select>"];
+var fieldset = [1, "<fieldset>", "</fieldset>"];
+var map = [1, "<map>", "</map>"];
+var object = [1, "<object>", "</object>"];
+var lookup = {
+        'area': map,
+        'col': colgroup,
+        'colgroup': table,
+        'caption': table,
+        'legend': fieldset,
+        'thead': table,
+        'tbody': table,
+        'tfoot': table,
+        'tr': tbody,
+        'td': tr,
+        'th': tr,
+        'option': select,
+        'optgroup': select,
+        'param': object
+    };
+var supportsTemplateTag = options.document && 'content' in options.document.createElement('template');
+
+
+function getWrap(tags) {
+    var m = tags.match(/^<([a-z]+)[ >]/);
+    return (m && lookup[m[1]]) || none;
+}
+
+
+function simpleHtmlParse(html, documentContext) {
+    documentContext || (documentContext = document);
+    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;
+
+    // Based on jQuery's "clean" function, but only accounting for table-related elements.
+    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
+
+    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
+    // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
+    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
+    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
+
+    // Trim whitespace, otherwise indexOf won't work as expected
+    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement("div"),
+        wrap = getWrap(tags),
+        depth = wrap[0];
+
+    // Go to html and back, then peel off extra wrappers
+    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
+    var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
+    if (typeof windowContext['innerShiv'] == "function") {
+        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding
+        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv
+        // somehow shims the native APIs so it just works anyway)
+        div.appendChild(windowContext['innerShiv'](markup));
+    } else {
+        div.innerHTML = markup;
+    }
+
+    // Move to the right depth
+    while (depth--)
+        div = div.lastChild;
+
+    return makeArray(div.lastChild.childNodes);
+}
+
+
+function templateHtmlParse(html, documentContext) {
+    if (!documentContext) { documentContext = document; }
+    var template = documentContext.createElement('template');
+    template.innerHTML = html;
+    return makeArray(template.content.childNodes);
+}
+
+
+function jQueryHtmlParse(html, documentContext) {
+    // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
+    if (jQueryInstance.parseHTML) {
+        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null
+    } else {
+        // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
+        var elems = jQueryInstance.clean([html], documentContext);
+
+        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
+        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
+        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
+        if (elems && elems[0]) {
+            // Find the top-most parent element that's a direct child of a document fragment
+            var elem = elems[0];
+            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
+                elem = elem.parentNode;
+            // ... then detach it
+            if (elem.parentNode)
+                elem.parentNode.removeChild(elem);
+        }
+
+        return elems;
+    }
+}
+
+
+/**
+ * parseHtmlFragment converts a string into an array of DOM Nodes.
+ * If supported, it uses <template>-tag parsing, falling back on
+ * jQuery parsing (if jQuery is present), and finally on a
+ * straightforward parser.
+ *
+ * @param  {string} html            To be parsed.
+ * @param  {Object} documentContext That owns the executing code.
+ * @return {[DOMNode]}              Parsed DOM Nodes
+ */
+function parseHtmlFragment(html, documentContext) {
+    // Prefer <template>-tag based HTML parsing.
+    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :
+
+        // Benefit from jQuery's on old browsers, where possible
+        // NOTE: jQuery's HTML parsing fails on element names like tr-*.
+        // See: https://github.com/jquery/jquery/pull/1988
+        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :
+
+        // ... otherwise, this simple logic will do in most common cases.
+        simpleHtmlParse(html, documentContext));
+}
+
+
+/**
+  * setHtml empties the node's contents, unwraps the HTML, and
+  * sets the node's HTML using jQuery.html or parseHtmlFragment
+  *
+  * @param {DOMNode} node Node in which HTML needs to be set
+  * @param {DOMNode} html HTML to be inserted in node
+  * @returns undefined
+  */
+function setHtml(node, html) {
+    emptyDomNode(node);
+
+    // There's few cases where we would want to display a stringified
+    // function, so we unwrap it.
+    if (typeof html === 'function') {
+        html = html();
+    }
+
+    if ((html !== null) && (html !== undefined)) {
+        if (typeof html !== 'string')
+            html = html.toString();
+
+        // If the browser supports <template> tags, prefer that, as
+        // it obviates all the complex workarounds of jQuery.
+        //
+        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
+        // for example <tr> elements which are not normally allowed to exist on their own.
+        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.
+        if (jQueryInstance && !supportsTemplateTag) {
+            jQueryInstance(node).html(html);
+        } else {
+            // ... otherwise, use KO's own parsing logic.
+            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);
+
+            if (node.nodeType === 8) {
+                if (html === null) {
+                    emptyNode(node);
+                } else {
+                    setDomNodeChildren$1(node, parsedNodes);
+                }
+            } else {
+                for (var i = 0; i < parsedNodes.length; i++)
+                    node.appendChild(parsedNodes[i]);
+            }
+        }
+    }
+}
+
+//
+// Memoization
+//
+var memos = {};
+
+function randomMax8HexChars() {
+    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
+}
+
+function generateRandomId() {
+    return randomMax8HexChars() + randomMax8HexChars();
+}
+
+function findMemoNodes(rootNode, appendToArray) {
+    if (!rootNode)
+        return;
+    if (rootNode.nodeType == 8) {
+        var memoId = parseMemoText(rootNode.nodeValue);
+        if (memoId != null)
+            appendToArray.push({ domNode: rootNode, memoId: memoId });
+    } else if (rootNode.nodeType == 1) {
+        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
+            findMemoNodes(childNodes[i], appendToArray);
+    }
+}
+
+
+function memoize(callback) {
+    if (typeof callback != "function")
+        throw new Error("You can only pass a function to memoization.memoize()");
+    var memoId = generateRandomId();
+    memos[memoId] = callback;
+    return "<!--[ko_memo:" + memoId + "]-->";
+}
+
+function unmemoize(memoId, callbackParams) {
+    var callback = memos[memoId];
+    if (callback === undefined)
+        throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
+    try {
+        callback.apply(null, callbackParams || []);
+        return true;
+    }
+    finally { delete memos[memoId]; }
+}
+
+function unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {
+    var memos = [];
+    findMemoNodes(domNode, memos);
+    for (var i = 0, j = memos.length; i < j; i++) {
+        var node = memos[i].domNode;
+        var combinedParams = [node];
+        if (extraCallbackParamsArray)
+            arrayPushAll(combinedParams, extraCallbackParamsArray);
+        unmemoize(memos[i].memoId, combinedParams);
+        node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
+        if (node.parentNode)
+            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
+    }
+}
+
+function parseMemoText(memoText) {
+    var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
+    return match ? match[1] : null;
+}
+
+
+var memoization = Object.freeze({
+	memoize: memoize,
+	unmemoize: unmemoize,
+	unmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,
+	parseMemoText: parseMemoText
+});
+
+//
+//  Tasks Micro-scheduler
+//  ===
+//
+/* eslint no-cond-assign: 0 */
+var taskQueue = [];
+var taskQueueLength = 0;
+var nextHandle = 1;
+var nextIndexToProcess = 0;
+var w = options.global;
+
+if (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {
+    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node
+    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT
+    options.taskScheduler = (function (callback) {
+        var div = w.document.createElement("div");
+        new MutationObserver(callback).observe(div, {attributes: true});
+        return function () { div.classList.toggle("foo"); };
+    })(scheduledProcess);
+} else if (w && w.document && "onreadystatechange" in w.document.createElement("script")) {
+    // IE 6-10
+    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT
+    options.taskScheduler = function (callback) {
+        var script = document.createElement("script");
+        script.onreadystatechange = function () {
+            script.onreadystatechange = null;
+            document.documentElement.removeChild(script);
+            script = null;
+            callback();
+        };
+        document.documentElement.appendChild(script);
+    };
+} else {
+    options.taskScheduler = function (callback) {
+        setTimeout(callback, 0);
+    };
+}
+
+function processTasks() {
+    if (taskQueueLength) {
+        // Each mark represents the end of a logical group of tasks and the number of these groups is
+        // limited to prevent unchecked recursion.
+        var mark = taskQueueLength, countMarks = 0;
+
+        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue
+        for (var task; nextIndexToProcess < taskQueueLength; ) {
+            if (task = taskQueue[nextIndexToProcess++]) {
+                if (nextIndexToProcess > mark) {
+                    if (++countMarks >= 5000) {
+                        nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion
+                        deferError(Error("'Too much recursion' after processing " + countMarks + " task groups."));
+                        break;
+                    }
+                    mark = taskQueueLength;
+                }
+                try {
+                    task();
+                } catch (ex) {
+                    deferError(ex);
+                }
+            }
+        }
+    }
+}
+
+function scheduledProcess() {
+    processTasks();
+
+    // Reset the queue
+    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
+}
+
+function scheduleTaskProcessing() {
+    options.taskScheduler(scheduledProcess);
+}
+
+
+function schedule(func) {
+    if (!taskQueueLength) {
+        scheduleTaskProcessing();
+    }
+
+    taskQueue[taskQueueLength++] = func;
+    return nextHandle++;
+}
+
+function cancel(handle) {
+    var index = handle - (nextHandle - taskQueueLength);
+    if (index >= nextIndexToProcess && index < taskQueueLength) {
+        taskQueue[index] = null;
+    }
+}
+
+// For testing only: reset the queue and return the previous queue length
+function resetForTesting() {
+    var length = taskQueueLength - nextIndexToProcess;
+    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
+    return length;
+}
+
+
+
+
+var tasks = Object.freeze({
+	schedule: schedule,
+	cancel: cancel,
+	resetForTesting: resetForTesting,
+	runEarly: processTasks
+});
+
+
+
+
+
+var utils = Object.freeze({
+	tasks: tasks,
+	virtualElements: virtualElements,
+	domData: data,
+	memoization: memoization,
+	jQuerySetInstance: jQuerySetInstance,
+	options: options,
+	arrayForEach: arrayForEach,
+	arrayIndexOf: arrayIndexOf,
+	arrayFirst: arrayFirst,
+	arrayRemoveItem: arrayRemoveItem,
+	arrayGetDistinctValues: arrayGetDistinctValues,
+	arrayMap: arrayMap,
+	arrayFilter: arrayFilter,
+	arrayPushAll: arrayPushAll,
+	addOrRemoveItem: addOrRemoveItem,
+	makeArray: makeArray,
+	range: range,
+	findMovesInArrayComparison: findMovesInArrayComparison,
+	compareArrays: compareArrays,
+	throttle: throttle,
+	debounce: debounce,
+	catchFunctionErrors: catchFunctionErrors,
+	deferError: deferError,
+	safeSetTimeout: safeSetTimeout,
+	ieVersion: ieVersion,
+	isIe6: isIe6,
+	isIe7: isIe7,
+	extend: extend,
+	objectForEach: objectForEach,
+	objectMap: objectMap,
+	getObjectOwnProperty: getObjectOwnProperty,
+	clonePlainObjectDeep: clonePlainObjectDeep,
+	canSetPrototype: canSetPrototype,
+	setPrototypeOf: setPrototypeOf,
+	setPrototypeOfOrExtend: setPrototypeOfOrExtend,
+	hasPrototype: hasPrototype,
+	stringTrim: stringTrim,
+	stringStartsWith: stringStartsWith,
+	parseJson: parseJson,
+	stringifyJson: stringifyJson,
+	useSymbols: useSymbols,
+	createSymbolOrString: createSymbolOrString,
+	toggleDomNodeCssClass: toggleDomNodeCssClass,
+	registerEventHandler: registerEventHandler,
+	triggerEvent: triggerEvent,
+	domNodeIsContainedBy: domNodeIsContainedBy,
+	domNodeIsAttachedToDocument: domNodeIsAttachedToDocument,
+	anyDomNodeIsAttachedToDocument: anyDomNodeIsAttachedToDocument,
+	tagNameLower: tagNameLower,
+	isDomElement: isDomElement,
+	isDocumentFragment: isDocumentFragment,
+	moveCleanedNodesToContainerElement: moveCleanedNodesToContainerElement,
+	cloneNodes: cloneNodes,
+	setDomNodeChildren: setDomNodeChildren,
+	replaceDomNodes: replaceDomNodes,
+	setElementName: setElementName,
+	setTextContent: setTextContent,
+	emptyDomNode: emptyDomNode,
+	fixUpContinuousNodeArray: fixUpContinuousNodeArray,
+	setOptionNodeSelectionState: setOptionNodeSelectionState,
+	forceRefresh: forceRefresh,
+	ensureSelectElementIsRenderedCorrectly: ensureSelectElementIsRenderedCorrectly,
+	parseHtmlFragment: parseHtmlFragment,
+	setHtml: setHtml,
+	addDisposeCallback: addDisposeCallback,
+	removeDisposeCallback: removeDisposeCallback,
+	cleanNode: cleanNode,
+	removeNode: removeNode,
+	otherNodeCleanerFunctions: otherNodeCleanerFunctions,
+	cleanjQueryData: cleanjQueryData
+});
+
+//
+//  Defer Updates
+//  ===
+//
+function deferUpdates(target) {
+    if (!target._deferUpdates) {
+        target._deferUpdates = true;
+        target.limit(function (callback) {
+            var handle;
+            return function () {
+                tasks.cancel(handle);
+                handle = tasks.schedule(callback);
+                target.notifySubscribers(undefined, 'dirty');
+            };
+        });
+    }
+}
+
+//
+// Observable extenders
+// ---
+//
+var primitiveTypes = {
+  'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1
+};
+
+function valuesArePrimitiveAndEqual (a, b) {
+  var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);
+  return oldValueIsPrimitive ? (a === b) : false
+}
+
+function applyExtenders (requestedExtenders) {
+  var target = this;
+  if (requestedExtenders) {
+    objectForEach(requestedExtenders, function (key, value) {
+      var extenderHandler = extenders[key];
+      if (typeof extenderHandler === 'function') {
+        target = extenderHandler(target, value) || target;
+      } else {
+        options.onError(new Error('Extender not found: ' + key));
+      }
+    });
+  }
+  return target
+}
+
+/*
+                --- DEFAULT EXTENDERS ---
+ */
+
+// Change when notifications are published.
+function notify (target, notifyWhen) {
+  target.equalityComparer = notifyWhen == 'always' ?
+        null :  // null equalityComparer means to always notify
+        valuesArePrimitiveAndEqual;
+}
+
+function deferred (target, option) {
+  if (option !== true) {
+    throw new Error('The \'deferred\' extender only accepts the value \'true\', because it is not supported to turn deferral off once enabled.')
+  }
+  deferUpdates(target);
+}
+
+function rateLimit (target, options$$1) {
+  var timeout, method, limitFunction;
+
+  if (typeof options$$1 === 'number') {
+    timeout = options$$1;
+  } else {
+    timeout = options$$1.timeout;
+    method = options$$1.method;
+  }
+
+    // rateLimit supersedes deferred updates
+  target._deferUpdates = false;
+
+  limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;
+
+  target.limit(function (callback) {
+    return limitFunction(callback, timeout)
+  });
+}
+
+var extenders = {
+  notify: notify,
+  deferred: deferred,
+  rateLimit: rateLimit
+};
+
+/* eslint no-cond-assign: 0 */
+function subscription (target, callback, disposeCallback) {
+  this._target = target;
+  this.callback = callback;
+  this.disposeCallback = disposeCallback;
+  this.isDisposed = false;
+}
+
+subscription.prototype.dispose = function () {
+  this.isDisposed = true;
+  this.disposeCallback();
+};
+
+function subscribable () {
+  setPrototypeOfOrExtend(this, ko_subscribable_fn);
+  ko_subscribable_fn.init(this);
+}
+
+var defaultEvent = 'change';
+
+var ko_subscribable_fn = {
+  init (instance) {
+    instance._subscriptions = {};
+    instance._versionNumber = 1;
+  },
+
+  subscribe (callback, callbackTarget, event) {
+    var self = this;
+
+    event = event || defaultEvent;
+    var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
+
+    var subscriptionInstance = new subscription(self, boundCallback, function () {
+      arrayRemoveItem(self._subscriptions[event], subscriptionInstance);
+      if (self.afterSubscriptionRemove) {
+        self.afterSubscriptionRemove(event);
+      }
+    });
+
+    if (self.beforeSubscriptionAdd) {
+      self.beforeSubscriptionAdd(event);
+    }
+
+    if (!self._subscriptions[event]) {
+      self._subscriptions[event] = [];
+    }
+    self._subscriptions[event].push(subscriptionInstance);
+
+    return subscriptionInstance
+  },
+
+  notifySubscribers (valueToNotify, event) {
+    event = event || defaultEvent;
+    if (event === defaultEvent) {
+      this.updateVersion();
+    }
+    if (this.hasSubscriptionsForEvent(event)) {
+      try {
+        begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)
+        for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {
+                    // In case a subscription was disposed during the arrayForEach cycle, check
+                    // for isDisposed on each subscription before invoking its callback
+          if (!subscriptionInstance.isDisposed) {
+            subscriptionInstance.callback(valueToNotify);
+          }
+        }
+      } finally {
+        end(); // End suppressing dependency detection
+      }
+    }
+  },
+
+  getVersion () {
+    return this._versionNumber
+  },
+
+  hasChanged (versionToCheck) {
+    return this.getVersion() !== versionToCheck
+  },
+
+  updateVersion () {
+    ++this._versionNumber;
+  },
+
+  hasSubscriptionsForEvent (event) {
+    return this._subscriptions[event] && this._subscriptions[event].length
+  },
+
+  getSubscriptionsCount (event) {
+    if (event) {
+      return this._subscriptions[event] && this._subscriptions[event].length || 0
+    } else {
+      var total = 0;
+      objectForEach(this._subscriptions, function (eventName, subscriptions) {
+        if (eventName !== 'dirty') {
+          total += subscriptions.length;
+        }
+      });
+      return total
+    }
+  },
+
+  isDifferent (oldValue, newValue) {
+    return !this.equalityComparer ||
+               !this.equalityComparer(oldValue, newValue)
+  },
+
+  once (cb) {
+    const subs = this.subscribe((nv) => {
+      subs.dispose();
+      cb(nv);
+    });
+  },
+
+  when (test, returnValue) {
+    const current = this.peek();
+    const givenRv = arguments.length > 1;
+    const testFn = typeof test === 'function' ? test : v => v === test;
+    if (testFn(current)) {
+      return options.Promise.resolve(givenRv ? returnValue : current)
+    }
+    return new options.Promise((resolve, reject) => {
+      const subs = this.subscribe(newValue => {
+        if (testFn(newValue)) {
+          subs.dispose();
+          resolve(givenRv ? returnValue : newValue);
+        }
+      });
+    })
+  },
+
+  yet (test, ...args) {
+    const testFn = typeof test === 'function' ? test : v => v === test;
+    const negated = v => !testFn(v);
+    return this.when(negated, ...args)
+  },
+
+  next () { return new Promise(resolve => this.once(resolve)) },
+
+  extend: applyExtenders
+};
+
+// For browsers that support proto assignment, we overwrite the prototype of each
+// observable instance. Since observables are functions, we need Function.prototype
+// to still be in the prototype chain.
+if (canSetPrototype) {
+  setPrototypeOf(ko_subscribable_fn, Function.prototype);
+}
+
+subscribable.fn = ko_subscribable_fn;
+
+function isSubscribable (instance) {
+  return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function'
+}
+
+//
+// dependencyDetection
+// ---
+//
+// In KO 3.x, dependencyDetection was also known as computedContext.
+//
+const outerFrames = [];
+let currentFrame;
+let lastId = 0;
+
+// Return a unique ID that can be assigned to an observable for dependency tracking.
+// Theoretically, you could eventually overflow the number storage size, resulting
+// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53
+// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would
+// take over 285 years to reach that number.
+// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html
+function getId () {
+  return ++lastId
+}
+
+function begin (options$$1) {
+  outerFrames.push(currentFrame);
+  currentFrame = options$$1;
+}
+
+function end () {
+  currentFrame = outerFrames.pop();
+}
+
+function registerDependency (subscribable$$1) {
+  if (currentFrame) {
+    if (!isSubscribable(subscribable$$1)) { throw new Error('Only subscribable things can act as dependencies') }
+    currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));
+  }
+}
+
+function ignore (callback, callbackTarget, callbackArgs) {
+  try {
+    begin();
+    return callback.apply(callbackTarget, callbackArgs || [])
+  } finally {
+    end();
+  }
+}
+
+function getDependenciesCount () {
+  if (currentFrame) { return currentFrame.computed.getDependenciesCount() }
+}
+
+function isInitial () {
+  if (currentFrame) { return currentFrame.isInitial }
+}
+
+
+
+
+var dependencyDetection = Object.freeze({
+	begin: begin,
+	end: end,
+	registerDependency: registerDependency,
+	ignore: ignore,
+	getDependenciesCount: getDependenciesCount,
+	isInitial: isInitial,
+	ignoreDependencies: ignore
+});
+
+//
+//  Observable values
+//  ---
+//
+var observableLatestValue = createSymbolOrString('_latestValue');
+
+function observable (initialValue) {
+  function Observable () {
+    if (arguments.length > 0) {
+            // Write
+            // Ignore writes if the value hasn't changed
+      if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {
+        Observable.valueWillMutate();
+        Observable[observableLatestValue] = arguments[0];
+        Observable.valueHasMutated();
+      }
+      return this // Permits chained assignments
+    } else {
+            // Read
+      registerDependency(Observable); // The caller only needs to be notified of changes if they did a "read" operation
+      return Observable[observableLatestValue]
+    }
+  }
+
+  Observable[observableLatestValue] = initialValue;
+
+    // Inherit from 'subscribable'
+  if (!canSetPrototype) {
+        // 'subscribable' won't be on the prototype chain unless we put it there directly
+    extend(Observable, subscribable.fn);
+  }
+  subscribable.fn.init(Observable);
+
+    // Inherit from 'observable'
+  setPrototypeOfOrExtend(Observable, observable.fn);
+
+  if (options.deferUpdates) {
+    deferUpdates(Observable);
+  }
+
+  return Observable
+}
+
+// Define prototype for observables
+observable.fn = {
+  equalityComparer: valuesArePrimitiveAndEqual,
+  peek () { return this[observableLatestValue] },
+  valueHasMutated () { this.notifySubscribers(this[observableLatestValue]); },
+  valueWillMutate () {
+    this.notifySubscribers(this[observableLatestValue], 'beforeChange');
+  },
+  then (res, rej) { try { res(this()); } catch (e) { rej(e); } },
+};
+
+// Moved out of "limit" to avoid the extra closure
+function limitNotifySubscribers (value, event) {
+  if (!event || event === defaultEvent) {
+    this._limitChange(value);
+  } else if (event === 'beforeChange') {
+    this._limitBeforeChange(value);
+  } else {
+    this._origNotifySubscribers(value, event);
+  }
+}
+
+// Add `limit` function to the subscribable prototype
+subscribable.fn.limit = function limit (limitFunction) {
+  var self = this;
+  var selfIsObservable = isObservable(self);
+  var beforeChange = 'beforeChange';
+  var ignoreBeforeChange, previousValue, pendingValue;
+
+  if (!self._origNotifySubscribers) {
+    self._origNotifySubscribers = self.notifySubscribers;
+    self.notifySubscribers = limitNotifySubscribers;
+  }
+
+  var finish = limitFunction(function () {
+    self._notificationIsPending = false;
+
+        // If an observable provided a reference to itself, access it to get the latest value.
+        // This allows computed observables to delay calculating their value until needed.
+    if (selfIsObservable && pendingValue === self) {
+      pendingValue = self();
+    }
+    ignoreBeforeChange = false;
+    if (self.isDifferent(previousValue, pendingValue)) {
+      self._origNotifySubscribers(previousValue = pendingValue);
+    }
+  });
+
+  self._limitChange = function (value) {
+    self._notificationIsPending = ignoreBeforeChange = true;
+    pendingValue = value;
+    finish();
+  };
+  self._limitBeforeChange = function (value) {
+    if (!ignoreBeforeChange) {
+      previousValue = value;
+      self._origNotifySubscribers(value, beforeChange);
+    }
+  };
+};
+
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the observable constructor
+if (canSetPrototype) {
+  setPrototypeOf(observable.fn, subscribable.fn);
+}
+
+var protoProperty$1 = observable.protoProperty = options.protoProperty;
+observable.fn[protoProperty$1] = observable;
+
+function isObservable (instance) {
+  return hasPrototype(instance, observable)
+}
+
+function unwrap (value) {
+  return isObservable(value) ? value() : value
+}
+
+function peek (value) {
+  return isObservable(value) ? value.peek() : value
+}
+
+function isWriteableObservable (instance) {
+    // Observable
+  if ((typeof instance === 'function') && instance[protoProperty$1] === observable) {
+    return true
+  }
+    // Writeable dependent observable
+  if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {
+    return true
+  }
+    // Anything else
+  return false
+}
+
+//
+// Observable Array - Change Tracking Extender
+// ---
+//
+/* eslint no-fallthrough: 0*/
+
+var arrayChangeEventName = 'arrayChange';
+
+
+function trackArrayChanges(target, options$$1) {
+    // Use the provided options--each call to trackArrayChanges overwrites the previously set options
+    target.compareArrayOptions = {};
+    if (options$$1 && typeof options$$1 == "object") {
+        extend(target.compareArrayOptions, options$$1);
+    }
+    target.compareArrayOptions.sparse = true;
+
+    // Only modify the target observable once
+    if (target.cacheDiffForKnownOperation) {
+        return;
+    }
+    var trackingChanges = false,
+        cachedDiff = null,
+        arrayChangeSubscription,
+        pendingNotifications = 0,
+        underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,
+        underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;
+
+    // Watch "subscribe" calls, and for array change events, ensure change tracking is enabled
+    target.beforeSubscriptionAdd = function (event) {
+        if (underlyingBeforeSubscriptionAddFunction)
+            underlyingBeforeSubscriptionAddFunction.call(target, event);
+        if (event === arrayChangeEventName) {
+            trackChanges();
+        }
+    };
+
+    // Watch "dispose" calls, and for array change events, ensure change tracking is disabled when all are disposed
+    target.afterSubscriptionRemove = function (event) {
+        if (underlyingAfterSubscriptionRemoveFunction)
+            underlyingAfterSubscriptionRemoveFunction.call(target, event);
+        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {
+            if (arrayChangeSubscription) {
+                arrayChangeSubscription.dispose();
+            }
+            arrayChangeSubscription = null;
+            trackingChanges = false;
+        }
+    };
+
+    function trackChanges() {
+        // Calling 'trackChanges' multiple times is the same as calling it once
+        if (trackingChanges) {
+            return;
+        }
+
+        trackingChanges = true;
+
+        // Intercept "notifySubscribers" to track how many times it was called.
+        var underlyingNotifySubscribersFunction = target['notifySubscribers'];
+        target['notifySubscribers'] = function(valueToNotify, event) {
+            if (!event || event === defaultEvent) {
+                ++pendingNotifications;
+            }
+            return underlyingNotifySubscribersFunction.apply(this, arguments);
+        };
+
+        // Each time the array changes value, capture a clone so that on the next
+        // change it's possible to produce a diff
+        var previousContents = [].concat(target.peek() || []);
+        cachedDiff = null;
+        arrayChangeSubscription = target.subscribe(function(currentContents) {
+            // Make a copy of the current contents and ensure it's an array
+            currentContents = [].concat(currentContents || []);
+
+            // Compute the diff and issue notifications, but only if someone is listening
+            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {
+                var changes = getChanges(previousContents, currentContents);
+            }
+
+            // Eliminate references to the old, removed items, so they can be GCed
+            previousContents = currentContents;
+            cachedDiff = null;
+            pendingNotifications = 0;
+
+            if (changes && changes.length) {
+                target['notifySubscribers'](changes, arrayChangeEventName);
+            }
+        });
+    }
+
+    function getChanges(previousContents, currentContents) {
+        // We try to re-use cached diffs.
+        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates
+        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,
+        // notifications are issued immediately so we wouldn't be queueing up more than one.
+        if (!cachedDiff || pendingNotifications > 1) {
+            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);
+        }
+
+        return cachedDiff;
+    }
+
+    target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {
+        var index, argsIndex;
+        // Only run if we're currently tracking changes for this observable array
+        // and there aren't any pending deferred notifications.
+        if (!trackingChanges || pendingNotifications) {
+            return;
+        }
+        var diff = [],
+            arrayLength = rawArray.length,
+            argsLength = args.length,
+            offset = 0;
+
+        function pushDiff(status, value, index) {
+            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };
+        }
+        switch (operationName) {
+        case 'push':
+            offset = arrayLength;
+        case 'unshift':
+            for (index = 0; index < argsLength; index++) {
+                pushDiff('added', args[index], offset + index);
+            }
+            break;
+
+        case 'pop':
+            offset = arrayLength - 1;
+        case 'shift':
+            if (arrayLength) {
+                pushDiff('deleted', rawArray[offset], offset);
+            }
+            break;
+
+        case 'splice':
+            // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].
+            // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
+            var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),
+                endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),
+                endAddIndex = startIndex + argsLength - 2,
+                endIndex = Math.max(endDeleteIndex, endAddIndex),
+                additions = [], deletions = [];
+            for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {
+                if (index < endDeleteIndex)
+                    deletions.push(pushDiff('deleted', rawArray[index], index));
+                if (index < endAddIndex)
+                    additions.push(pushDiff('added', args[argsIndex], index));
+            }
+            findMovesInArrayComparison(deletions, additions);
+            break;
+
+        default:
+            return;
+        }
+        cachedDiff = diff;
+    };
+}
+
+
+// Expose compareArrays for testing.
+trackArrayChanges.compareArrays = compareArrays;
+
+
+// Add the trackArrayChanges extender so we can use
+// obs.extend({ trackArrayChanges: true })
+extenders.trackArrayChanges = trackArrayChanges;
+
+//
+// Observable Arrays
+// ===
+//
+function observableArray (initialValues) {
+  initialValues = initialValues || [];
+
+  if (typeof initialValues !== 'object' || !('length' in initialValues)) { throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.') }
+
+  var result = observable(initialValues);
+  setPrototypeOfOrExtend(result, observableArray.fn);
+  trackArrayChanges(result);
+        // ^== result.extend({ trackArrayChanges: true })
+  return result
+}
+
+observableArray.fn = {
+  remove: function (valueOrPredicate) {
+    var underlyingArray = this.peek();
+    var removedValues = [];
+    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };
+    for (var i = 0; i < underlyingArray.length; i++) {
+      var value = underlyingArray[i];
+      if (predicate(value)) {
+        if (removedValues.length === 0) {
+          this.valueWillMutate();
+        }
+        removedValues.push(value);
+        underlyingArray.splice(i, 1);
+        i--;
+      }
+    }
+    if (removedValues.length) {
+      this.valueHasMutated();
+    }
+    return removedValues
+  },
+
+  removeAll: function (arrayOfValues) {
+        // If you passed zero args, we remove everything
+    if (arrayOfValues === undefined) {
+      var underlyingArray = this.peek();
+      var allValues = underlyingArray.slice(0);
+      this.valueWillMutate();
+      underlyingArray.splice(0, underlyingArray.length);
+      this.valueHasMutated();
+      return allValues
+    }
+        // If you passed an arg, we interpret it as an array of entries to remove
+    if (!arrayOfValues) {
+      return []
+    }
+    return this['remove'](function (value) {
+      return arrayIndexOf(arrayOfValues, value) >= 0
+    })
+  },
+
+  destroy: function (valueOrPredicate) {
+    var underlyingArray = this.peek();
+    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };
+    this.valueWillMutate();
+    for (var i = underlyingArray.length - 1; i >= 0; i--) {
+      var value = underlyingArray[i];
+      if (predicate(value)) {
+        underlyingArray[i]['_destroy'] = true;
+      }
+    }
+    this.valueHasMutated();
+  },
+
+  destroyAll: function (arrayOfValues) {
+        // If you passed zero args, we destroy everything
+    if (arrayOfValues === undefined) { return this.destroy(function () { return true }) }
+
+        // If you passed an arg, we interpret it as an array of entries to destroy
+    if (!arrayOfValues) {
+      return []
+    }
+    return this.destroy(function (value) {
+      return arrayIndexOf(arrayOfValues, value) >= 0
+    })
+  },
+
+  indexOf: function (item) {
+    var underlyingArray = this();
+    return arrayIndexOf(underlyingArray, item)
+  },
+
+  replace: function (oldItem, newItem) {
+    var index = this.indexOf(oldItem);
+    if (index >= 0) {
+      this.valueWillMutate();
+      this.peek()[index] = newItem;
+      this.valueHasMutated();
+    }
+  }
+};
+
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the ko.observableArray constructor
+if (canSetPrototype) {
+  setPrototypeOf(observableArray.fn, observable.fn);
+}
+
+// Populate ko.observableArray.fn with read/write functions from native arrays
+// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
+// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
+arrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+  observableArray.fn[methodName] = function () {
+        // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
+        // (for consistency with mutating regular observables)
+    var underlyingArray = this.peek();
+    this.valueWillMutate();
+    this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);
+    var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
+    this.valueHasMutated();
+        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.
+    return methodCallResult === underlyingArray ? this : methodCallResult
+  };
+});
+
+// Populate ko.observableArray.fn with read-only functions from native arrays
+arrayForEach(['slice'], function (methodName) {
+  observableArray.fn[methodName] = function () {
+    var underlyingArray = this();
+    return underlyingArray[methodName].apply(underlyingArray, arguments)
+  };
+});
+
+//
+// Helpers
+// ---
+// toJS & toJSON
+//
+var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
+
+function toJS(rootObject) {
+    if (arguments.length == 0)
+        throw new Error("When calling ko.toJS, pass the object you want to convert.");
+
+    // We just unwrap everything at every level in the object graph
+    return mapJsObjectGraph(rootObject, function(valueToMap) {
+        // Loop because an observable's value might in turn be another observable wrapper
+        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
+            valueToMap = valueToMap();
+        return valueToMap;
+    });
+}
+
+function toJSON(rootObject, replacer, space) {     // replacer and space are optional
+    var plainJavaScriptObject = toJS(rootObject);
+    return stringifyJson(plainJavaScriptObject, replacer, space);
+}
+
+function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
+    visitedObjects = visitedObjects || new objectLookup();
+
+    rootObject = mapInputCallback(rootObject);
+    var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));
+    if (!canHaveProperties)
+        return rootObject;
+
+    var outputProperties = rootObject instanceof Array ? [] : {};
+    visitedObjects.save(rootObject, outputProperties);
+
+    visitPropertiesOrArrayEntries(rootObject, function(indexer) {
+        var propertyValue = mapInputCallback(rootObject[indexer]);
+
+        switch (typeof propertyValue) {
+        case "boolean":
+        case "number":
+        case "string":
+        case "function":
+            outputProperties[indexer] = propertyValue;
+            break;
+        case "object":
+        case "undefined":
+            var previouslyMappedValue = visitedObjects.get(propertyValue);
+            outputProperties[indexer] = (previouslyMappedValue !== undefined)
+                ? previouslyMappedValue
+                : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
+            break;
+        }
+    });
+
+    return outputProperties;
+}
+
+function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
+    if (rootObject instanceof Array) {
+        for (var i = 0; i < rootObject.length; i++)
+            visitorCallback(i);
+
+        // For arrays, also respect toJSON property for custom mappings (fixes #278)
+        if (typeof rootObject['toJSON'] == 'function')
+            visitorCallback('toJSON');
+    } else {
+        for (var propertyName in rootObject) {
+            visitorCallback(propertyName);
+        }
+    }
+}
+
+function objectLookup() {
+    this.keys = [];
+    this.values = [];
+}
+
+objectLookup.prototype = {
+    constructor: objectLookup,
+    save: function(key, value) {
+        var existingIndex = arrayIndexOf(this.keys, key);
+        if (existingIndex >= 0)
+            this.values[existingIndex] = value;
+        else {
+            this.keys.push(key);
+            this.values.push(value);
+        }
+    },
+    get: function(key) {
+        var existingIndex = arrayIndexOf(this.keys, key);
+        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;
+    }
+};
+
+//
+// Computed Observable Values
+//
+// (before tko, `computed` was also known as `dependentObservable`)
+//
+var computedState = createSymbolOrString('_state');
+
+function computed (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {
+  if (typeof evaluatorFunctionOrOptions === 'object') {
+        // Single-parameter syntax - everything is on this "options" param
+    options$$1 = evaluatorFunctionOrOptions;
+  } else {
+        // Multi-parameter syntax - construct the options according to the params passed
+    options$$1 = options$$1 || {};
+    if (evaluatorFunctionOrOptions) {
+      options$$1.read = evaluatorFunctionOrOptions;
+    }
+  }
+  if (typeof options$$1.read !== 'function') {
+    throw Error('Pass a function that returns the value of the computed')
+  }
+
+  var writeFunction = options$$1.write;
+  var state = {
+    latestValue: undefined,
+    isStale: true,
+    isBeingEvaluated: false,
+    suppressDisposalUntilDisposeWhenReturnsFalse: false,
+    isDisposed: false,
+    pure: false,
+    isSleeping: false,
+    readFunction: options$$1.read,
+    evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,
+    disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,
+    disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,
+    domNodeDisposalCallback: null,
+    dependencyTracking: {},
+    dependenciesCount: 0,
+    evaluationTimeoutInstance: null
+  };
+
+  function computedObservable () {
+    if (arguments.length > 0) {
+      if (typeof writeFunction === 'function') {
+                // Writing a value
+        writeFunction.apply(state.evaluatorFunctionTarget, arguments);
+      } else {
+        throw new Error("Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.")
+      }
+      return this // Permits chained assignments
+    } else {
+            // Reading the value
+      dependencyDetection.registerDependency(computedObservable);
+      if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {
+        computedObservable.evaluateImmediate();
+      }
+      return state.latestValue
+    }
+  }
+
+  computedObservable[computedState] = state;
+  computedObservable.hasWriteFunction = typeof writeFunction === 'function';
+
+    // Inherit from 'subscribable'
+  if (!canSetPrototype) {
+        // 'subscribable' won't be on the prototype chain unless we put it there directly
+    extend(computedObservable, subscribable.fn);
+  }
+  subscribable.fn.init(computedObservable);
+
+    // Inherit from 'computed'
+  setPrototypeOfOrExtend(computedObservable, computed.fn);
+
+  if (options$$1.pure) {
+    state.pure = true;
+    state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription
+    extend(computedObservable, pureComputedOverrides);
+  } else if (options$$1.deferEvaluation) {
+    extend(computedObservable, deferEvaluationOverrides);
+  }
+
+  if (options.deferUpdates) {
+    extenders.deferred(computedObservable, true);
+  }
+
+  if (options.debug) {
+        // #1731 - Aid debugging by exposing the computed's options
+    computedObservable._options = options$$1;
+  }
+
+  if (state.disposeWhenNodeIsRemoved) {
+        // Since this computed is associated with a DOM node, and we don't want to dispose the computed
+        // until the DOM node is *removed* from the document (as opposed to never having been in the document),
+        // we'll prevent disposal until "disposeWhen" first returns false.
+    state.suppressDisposalUntilDisposeWhenReturnsFalse = true;
+
+        // disposeWhenNodeIsRemoved: true can be used to opt into the "only dispose after first false result"
+        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try
+        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't
+        // be documented or used by application code, as it's likely to change in a future version of KO.
+    if (!state.disposeWhenNodeIsRemoved.nodeType) {
+      state.disposeWhenNodeIsRemoved = null;
+    }
+  }
+
+    // Evaluate, unless sleeping or deferEvaluation is true
+  if (!state.isSleeping && !options$$1.deferEvaluation) {
+    computedObservable.evaluateImmediate();
+  }
+
+    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is
+    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).
+  if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {
+    addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {
+      computedObservable.dispose();
+    });
+  }
+
+  return computedObservable
+}
+
+// Utility function that disposes a given dependencyTracking entry
+function computedDisposeDependencyCallback (id, entryToDispose) {
+  if (entryToDispose !== null && entryToDispose.dispose) {
+    entryToDispose.dispose();
+  }
+}
+
+// This function gets called each time a dependency is detected while evaluating a computed.
+// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.
+function computedBeginDependencyDetectionCallback (subscribable$$1, id) {
+  var computedObservable = this.computedObservable,
+    state = computedObservable[computedState];
+  if (!state.isDisposed) {
+    if (this.disposalCount && this.disposalCandidates[id]) {
+            // Don't want to dispose this subscription, as it's still being used
+      computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);
+      this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway
+      --this.disposalCount;
+    } else if (!state.dependencyTracking[id]) {
+            // Brand new subscription - add it
+      computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));
+    }
+  }
+}
+
+computed.fn = {
+  equalityComparer: valuesArePrimitiveAndEqual,
+  getDependenciesCount: function () {
+    return this[computedState].dependenciesCount
+  },
+  addDependencyTracking: function (id, target, trackingObj) {
+    if (this[computedState].pure && target === this) {
+      throw Error("A 'pure' computed must not be called recursively")
+    }
+
+    this[computedState].dependencyTracking[id] = trackingObj;
+    trackingObj._order = this[computedState].dependenciesCount++;
+    trackingObj._version = target.getVersion();
+  },
+  haveDependenciesChanged: function () {
+    var id, dependency, dependencyTracking = this[computedState].dependencyTracking;
+    for (id in dependencyTracking) {
+      if (dependencyTracking.hasOwnProperty(id)) {
+        dependency = dependencyTracking[id];
+        if (dependency._target.hasChanged(dependency._version)) {
+          return true
+        }
+      }
+    }
+  },
+  markDirty: function () {
+        // Process "dirty" events if we can handle delayed notifications
+    if (this._evalDelayed && !this[computedState].isBeingEvaluated) {
+      this._evalDelayed();
+    }
+  },
+  isActive: function () {
+    return this[computedState].isStale || this[computedState].dependenciesCount > 0
+  },
+  respondToChange: function () {
+        // Ignore "change" events if we've already scheduled a delayed notification
+    if (!this._notificationIsPending) {
+      this.evaluatePossiblyAsync();
+    }
+  },
+  subscribeToDependency: function (target) {
+    if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {
+      var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),
+        changeSub = target.subscribe(this.respondToChange, this);
+      return {
+        _target: target,
+        dispose: function () {
+          dirtySub.dispose();
+          changeSub.dispose();
+        }
+      }
+    } else {
+      return target.subscribe(this.evaluatePossiblyAsync, this)
+    }
+  },
+  evaluatePossiblyAsync: function () {
+    var computedObservable = this,
+      throttleEvaluationTimeout = computedObservable.throttleEvaluation;
+    if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
+      clearTimeout(this[computedState].evaluationTimeoutInstance);
+      this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {
+        computedObservable.evaluateImmediate(true /* notifyChange */);
+      }, throttleEvaluationTimeout);
+    } else if (computedObservable._evalDelayed) {
+      computedObservable._evalDelayed();
+    } else {
+      computedObservable.evaluateImmediate(true /* notifyChange */);
+    }
+  },
+  evaluateImmediate: function (notifyChange) {
+    var computedObservable = this,
+      state = computedObservable[computedState],
+      disposeWhen = state.disposeWhen;
+
+    if (state.isBeingEvaluated) {
+            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
+            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
+            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
+            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
+      return
+    }
+
+        // Do not evaluate (and possibly capture new dependencies) if disposed
+    if (state.isDisposed) {
+      return
+    }
+
+    if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {
+            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse
+      if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {
+        computedObservable.dispose();
+        return
+      }
+    } else {
+            // It just did return false, so we can stop suppressing now
+      state.suppressDisposalUntilDisposeWhenReturnsFalse = false;
+    }
+
+    state.isBeingEvaluated = true;
+    try {
+      this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);
+    } finally {
+      state.isBeingEvaluated = false;
+    }
+
+    if (!state.dependenciesCount) {
+      computedObservable.dispose();
+    }
+  },
+  evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {
+        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.
+        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,
+        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).
+
+    var computedObservable = this,
+      state = computedObservable[computedState];
+
+        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
+        // Then, during evaluation, we cross off any that are in fact still being used.
+    var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time
+      dependencyDetectionContext = {
+        computedObservable: computedObservable,
+        disposalCandidates: state.dependencyTracking,
+        disposalCount: state.dependenciesCount
+      };
+
+    dependencyDetection.begin({
+      callbackTarget: dependencyDetectionContext,
+      callback: computedBeginDependencyDetectionCallback,
+      computed: computedObservable,
+      isInitial: isInitial
+    });
+
+    state.dependencyTracking = {};
+    state.dependenciesCount = 0;
+
+    var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);
+
+    if (computedObservable.isDifferent(state.latestValue, newValue)) {
+      if (!state.isSleeping) {
+        computedObservable.notifySubscribers(state.latestValue, 'beforeChange');
+      }
+
+      state.latestValue = newValue;
+
+      if (state.isSleeping) {
+        computedObservable.updateVersion();
+      } else if (notifyChange) {
+        computedObservable.notifySubscribers(state.latestValue);
+      }
+    }
+
+    if (isInitial) {
+      computedObservable.notifySubscribers(state.latestValue, 'awake');
+    }
+  },
+  evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {
+        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.
+        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection
+        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU
+        // overhead of computed evaluation (on V8 at least).
+
+    try {
+      var readFunction = state.readFunction;
+      return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction()
+    } finally {
+      dependencyDetection.end();
+
+            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
+      if (dependencyDetectionContext.disposalCount && !state.isSleeping) {
+        objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);
+      }
+
+      state.isStale = false;
+    }
+  },
+  peek: function () {
+        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when "deferEvaluation" is set.
+    var state = this[computedState];
+    if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {
+      this.evaluateImmediate();
+    }
+    return state.latestValue
+  },
+  limit: function (limitFunction) {
+        // Override the limit function with one that delays evaluation as well
+    subscribable.fn.limit.call(this, limitFunction);
+    this._evalDelayed = function () {
+      this._limitBeforeChange(this[computedState].latestValue);
+
+      this[computedState].isStale = true; // Mark as dirty
+
+            // Pass the observable to the "limit" code, which will access it when
+            // it's time to do the notification.
+      this._limitChange(this);
+    };
+  },
+  dispose: function () {
+    var state = this[computedState];
+    if (!state.isSleeping && state.dependencyTracking) {
+      objectForEach(state.dependencyTracking, function (id, dependency) {
+        if (dependency.dispose) {
+          dependency.dispose();
+        }
+      });
+    }
+    if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {
+      removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);
+    }
+    state.dependencyTracking = null;
+    state.dependenciesCount = 0;
+    state.isDisposed = true;
+    state.isStale = false;
+    state.isSleeping = false;
+    state.disposeWhenNodeIsRemoved = null;
+    state.readFunction = null;
+    if (options.debug) {
+      this._options = null;
+    }
+  }
+};
+
+var pureComputedOverrides = {
+  beforeSubscriptionAdd: function (event) {
+        // If asleep, wake up the computed by subscribing to any dependencies.
+    var computedObservable = this,
+      state = computedObservable[computedState];
+    if (!state.isDisposed && state.isSleeping && event == 'change') {
+      state.isSleeping = false;
+      if (state.isStale || computedObservable.haveDependenciesChanged()) {
+        state.dependencyTracking = null;
+        state.dependenciesCount = 0;
+        state.isStale = true;
+        computedObservable.evaluateImmediate();
+      } else {
+                // First put the dependencies in order
+        var dependeciesOrder = [];
+        objectForEach(state.dependencyTracking, function (id, dependency) {
+          dependeciesOrder[dependency._order] = id;
+        });
+                // Next, subscribe to each one
+        arrayForEach(dependeciesOrder, function (id, order) {
+          var dependency = state.dependencyTracking[id],
+            subscription = computedObservable.subscribeToDependency(dependency._target);
+          subscription._order = order;
+          subscription._version = dependency._version;
+          state.dependencyTracking[id] = subscription;
+        });
+      }
+      if (!state.isDisposed) {     // test since evaluating could trigger disposal
+        computedObservable.notifySubscribers(state.latestValue, 'awake');
+      }
+    }
+  },
+  afterSubscriptionRemove: function (event) {
+    var state = this[computedState];
+    if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {
+      objectForEach(state.dependencyTracking, function (id, dependency) {
+        if (dependency.dispose) {
+          state.dependencyTracking[id] = {
+            _target: dependency._target,
+            _order: dependency._order,
+            _version: dependency._version
+          };
+          dependency.dispose();
+        }
+      });
+      state.isSleeping = true;
+      this.notifySubscribers(undefined, 'asleep');
+    }
+  },
+  getVersion: function () {
+        // Because a pure computed is not automatically updated while it is sleeping, we can't
+        // simply return the version number. Instead, we check if any of the dependencies have
+        // changed and conditionally re-evaluate the computed observable.
+    var state = this[computedState];
+    if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {
+      this.evaluateImmediate();
+    }
+    return subscribable.fn.getVersion.call(this)
+  }
+};
+
+var deferEvaluationOverrides = {
+  beforeSubscriptionAdd: function (event) {
+        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.
+    if (event == 'change' || event == 'beforeChange') {
+      this.peek();
+    }
+  }
+};
+
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the ko.computed constructor
+if (canSetPrototype) {
+  setPrototypeOf(computed.fn, subscribable.fn);
+}
+
+// Set the proto chain values for ko.hasPrototype
+var protoProp = observable.protoProperty; // == "__ko_proto__"
+computed[protoProp] = observable;
+computed.fn[protoProp] = computed;
+
+function isComputed (instance) {
+  return hasPrototype(instance, computed)
+}
+
+function isPureComputed (instance) {
+  return hasPrototype(instance, computed)
+        && instance[computedState] && instance[computedState].pure
+}
+
+function pureComputed (evaluatorFunctionOrOptions, evaluatorFunctionTarget) {
+  if (typeof evaluatorFunctionOrOptions === 'function') {
+    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, {'pure': true})
+  } else {
+    evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions);   // make a copy of the parameter object
+    evaluatorFunctionOrOptions.pure = true;
+    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget)
+  }
+}
+
+function throttleExtender(target, timeout) {
+    // Throttling means two things:
+
+    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
+    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
+    target.throttleEvaluation = timeout;
+
+    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
+    //     so the target cannot change value synchronously or faster than a certain rate
+    var writeTimeoutInstance = null;
+    return computed({
+        read: target,
+        write: function(value) {
+            clearTimeout(writeTimeoutInstance);
+            writeTimeoutInstance = setTimeout(function() {
+                target(value);
+            }, timeout);
+        }
+    });
+}
+
+
+extenders.throttle = throttleExtender;
+
+function LAMBDA () {}
+
+/**
+ * @ operator - recursively call the identifier if it's a function
+ * @param  {operand} a ignored
+ * @param  {operand} b The variable to be called (if a function) and unwrapped
+ * @return {value}   The result.
+ */
+function unwrapOrCall (a, b) {
+  while (typeof b === 'function') { b = b(); }
+  return b
+}
+
+const operators = {
+  // unary
+  '@': unwrapOrCall,
+  '#': (a, b) => () => unwrap(b), // Convert to read-only.
+  '=>': LAMBDA,
+  '!': function not (a, b) { return !b },
+  '!!': function notnot (a, b) { return !!b },
+  '++': function preinc (a, b) { return ++b },
+  '--': function preinc (a, b) { return --b },
+  // mul/div
+  '*': function mul (a, b) { return a * b },
+  '/': function div (a, b) { return a / b },
+  '%': function mod (a, b) { return a % b },
+  // sub/add
+  '+': function add (a, b) { return a + b },
+  '-': function sub (a, b) { return (a || 0) - (b || 0) },
+  '&-': function neg (a, b) { return -1 * b },
+  // relational
+  '<': function lt (a, b) { return a < b },
+  '<=': function le (a, b) { return a <= b },
+  '>': function gt (a, b) { return a > b },
+  '>=': function ge (a, b) { return a >= b },
+  //    TODO: 'in': function (a, b) { return a in b; },
+  //    TODO: 'instanceof': function (a, b) { return a instanceof b; },
+  // equality
+  '==': function equal (a, b) { return a === b },
+  '!=': function ne (a, b) { return a !== b },
+  '===': function sequal (a, b) { return a === b },
+  '!==': function sne (a, b) { return a !== b },
+  // bitwise
+  '&': function bitAnd (a, b) { return a & b },
+  '^': function xor (a, b) { return a ^ b },
+  '|': function bitOr (a, b) { return a | b },
+  // logic
+  '&&': function logicAnd (a, b) { return a && b },
+  '||': function logicOr (a, b) { return a || b },
+  // Access
+  '.': function member (a, b) { return a[b] },
+  '[': function member (a, b) { return a[b] },
+  // conditional/ternary
+  // '?': ternary See Node.js
+  // Function-Call
+  'call': function callOp (a, b) { return a.apply(null, b) }
+};
+
+/* Order of precedence from:
+https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table
+*/
+
+  // Our operator - unwrap/call
+operators['@'].precedence = 21;
+operators['#'].precedence = 21;
+
+  // lambda
+operators['=>'].precedence = 20;
+
+  // Member
+operators['.'].precedence = 19;
+operators['['].precedence = 19;
+
+  // Logical not
+operators['!'].precedence = 16;
+operators['!!'].precedence = 16; // explicit double-negative
+
+  // Prefix inc/dec
+operators['++'].precedence = 16;
+operators['--'].precedence = 16;
+operators['&-'].precedence = 16;
+
+  // mul/div/remainder
+operators['%'].precedence = 14;
+operators['*'].precedence = 14;
+operators['/'].precedence = 14;
+
+  // add/sub
+operators['+'].precedence = 13;
+operators['-'].precedence = 13;
+
+  // bitwise
+operators['|'].precedence = 12;
+operators['^'].precedence = 11;
+operators['&'].precedence = 10;
+
+  // comparison
+operators['<'].precedence = 11;
+operators['<='].precedence = 11;
+operators['>'].precedence = 11;
+operators['>='].precedence = 11;
+
+  // operators['in'].precedence = 8;
+  // operators['instanceof'].precedence = 8;
+  // equality
+operators['=='].precedence = 10;
+operators['!='].precedence = 10;
+operators['==='].precedence = 10;
+operators['!=='].precedence = 10;
+
+  // logic
+operators['&&'].precedence = 6;
+operators['||'].precedence = 5;
+
+operators['&&'].earlyOut = (a) => !a;
+operators['||'].earlyOut = (a) => a;
+
+  // Call a function
+operators['call'].precedence = 1;
+
+const IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');
+
+class Node {
+  constructor (lhs, op, rhs) {
+    this.lhs = lhs;
+    this.op = op;
+    this.rhs = rhs;
+  }
+
+  static get operators () { return operators }
+
+  get_leaf_value (leaf, context, globals, node) {
+    if (typeof leaf === 'function') {
+      // Expressions on observables are nonsensical, so we unwrap any
+      // function values (e.g. identifiers).
+      return unwrap(leaf())
+    }
+
+    // primitives
+    if (typeof leaf !== 'object' || leaf === null) { return leaf }
+
+    // Identifiers and Expressions
+    if (leaf[Node.isExpressionOrIdentifierSymbol]) {
+      // lhs is passed in as the parent of the leaf. It will be defined in
+      // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.
+      return unwrap(leaf.get_value(undefined, context, globals, node))
+    }
+
+    // Plain object/class.
+    return leaf
+  }
+
+  /**
+   * Return a function that calculates and returns an expression's value
+   * when called.
+   * @param  {array} ops  The operations to perform
+   * @return {function}   The function that calculates the expression.
+   *
+   * Note that for a lambda, we do not evaluate the RHS expression until
+   * the lambda is called.
+   */
+  get_value (notused, context, globals, node) {
+    var node = this;
+
+    if (node.op === LAMBDA) {
+      return () => node.get_leaf_value(node.rhs, context, globals, node)
+    }
+
+    const lhv = node.get_leaf_value(node.lhs, context, globals, node);
+    const earlyOut = node.op.earlyOut;
+
+    if (earlyOut && earlyOut(lhv)) { return lhv }
+    const rhv = node.get_leaf_value(node.rhs, context, globals, node);
+
+    return node.op(lhv, rhv, context, globals)
+  }
+
+  //
+  // Class variables.
+  //
+  static get isExpressionOrIdentifierSymbol () { return IS_EXPR_OR_IDENT }
+  get [IS_EXPR_OR_IDENT] () { return true }
+
+  static value_of (item, context, globals, node) {
+    if (item && item[Node.isExpressionOrIdentifierSymbol]) {
+      return item.get_value(item, context, globals, node)
+    }
+    return item
+  }
+
+  /**
+  *  Convert an array of nodes to an executable tree.
+  *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding
+  *                      to the left hand side, right hand side, and
+  *                      operation function.
+  */
+  static create_root (nodes) {
+    var root, leaf, op, value;
+
+    // Prime the leaf = root node.
+    leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());
+
+    while (true) {
+      op = nodes.shift();
+      value = nodes.shift();
+      if (!op) {
+        break
+      }
+      if (op.precedence < root.op.precedence) {
+        // rebase
+        root = new Node(root, op, value);
+        leaf = root;
+      } else {
+        leaf.rhs = new Node(leaf.rhs, op, value);
+        leaf = leaf.rhs;
+      }
+    }
+    // console.log('tree', root)
+    return root
+  }
+}
+
+/**
+ * Because of cyclical dependencies on operators <-> Node <-> value_of,
+ * we need to patch this in here.
+ */
+operators['?'] = function ternary (a, b, context, globals, node) {
+  return Node.value_of(a ? b.yes : b.no, context, globals, node)
+};
+operators['?'].precedence = 4;
+
+class Expression {
+  constructor (nodes) {
+    this.nodes = nodes;
+    this.root = Node.create_root(nodes);
+  }
+
+  /**
+   * Return the value of `this` Expression instance.
+   */
+  get_value (parent, context, globals, node) {
+    if (!this.root) {
+      this.root = Node.create_root(this.nodes);
+    }
+    return this.root.get_value(parent, context, globals, node)
+  }
+}
+
+Expression.prototype[Node.isExpressionOrIdentifierSymbol] = true;
+
+class Arguments {
+  constructor (parser, args) {
+    this.parser = parser;
+    this.args = args;
+  }
+
+  get_value (parent, context, globals, node) {
+    var deReffedArgs = [];
+    for (var i = 0, j = this.args.length; i < j; ++i) {
+      deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));
+    }
+    return deReffedArgs
+  };
+
+  get [Node.isExpressionOrIdentifierSymbol] () { return true }
+}
+
+/**
+ * The following regular expressions were generated by
+ *  https://mathiasbynens.be/demo/javascript-identifier-regex
+ */
+var IDStart = /[\$A-Z_a-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/;
+
+var IDContinue = 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\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/;
+
+class Identifier {
+  constructor (parser, token, dereferences) {
+    this.token = token;
+    this.dereferences = dereferences;
+    this.parser = parser;
+  }
+
+  /**
+   * Apply all () and [] functions on the identifier to the lhs value e.g.
+   * a()[3] has deref functions that are essentially this:
+   *     [_deref_call, _deref_this where this=3]
+   *
+   * @param  {mixed} value  Should be an object.
+   * @return {mixed}        The dereferenced value.
+   *
+   * [1] We want to bind any function that is a method of an object, but not
+   *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where
+   *     we're given `data-bind='binding: obj.x'` and x is a computed will
+   *     break the computed's `this` and it will stop working as expected.
+   *
+   *     The test `!last_value.hasOwnProperty(member)`
+   *     distinguishes between functions on the prototype chain (prototypal
+   *     members) and value-members added directly to the object.  This may
+   *     not be the canonical test for this relationship, but it succeeds
+   *     in the known test cases.
+   *
+   *     See: `this` tests of our dereference function.
+   */
+  dereference (value, $context, globals, node) {
+    let member;
+    let refs = this.dereferences || [];
+    const $data = $context.$data || {};
+    let lastValue;  // becomes `this` in function calls to object properties.
+    let i, n;
+
+    for (i = 0, n = refs.length; i < n; ++i) {
+      member = Node.value_of(refs[i], $context, globals, node);
+
+      if (typeof value === 'function' && refs[i] instanceof Arguments) {
+        // fn(args)
+        value = value.apply(lastValue || $data, member);
+        lastValue = value;
+      } else {
+        // obj[x] or obj.x dereference.  Note that obj may be a function.
+        lastValue = value;
+        value = Node.value_of(value[member], $context, globals, node);
+      }
+    }
+
+    // [1] See note above.
+    if (typeof value === 'function' && n > 0 && lastValue !== value &&
+        !lastValue.hasOwnProperty(member)) {
+      return value.bind(lastValue)
+    }
+
+    return value
+  };
+
+  /**
+   * Return the value as one would get it from the top-level i.e.
+   * $data.token/$context.token/globals.token; this does not return intermediate
+   * values on a chain of members i.e. $data.hello.there -- requesting the
+   * Identifier('there').value will return $data/$context/globals.there.
+   *
+   * This will dereference using () or [arg] member.
+   * @param  {object | Identifier | Expression} parent
+   * @return {mixed}  Return the primitive or an accessor.
+   */
+  get_value (parent, context, globals, node) {
+    const intermediate = parent && !(parent instanceof Identifier)
+      ? Node.value_of(parent, context, globals, node)[this.token]
+      : context.lookup(this.token, globals, node);
+    return this.dereference(intermediate, context, globals, node)
+  }
+
+  assign (object, property, value) {
+    if (isWriteableObservable(object[property])) {
+      object[property](value);
+    } else if (!isObservable(object[property])) {
+      object[property] = value;
+    }
+  };
+
+  /**
+   * Set the value of the Identifier.
+   *
+   * @param {Mixed} new_value The value that Identifier is to be set to.
+   */
+  set_value (new_value, $context, globals) {
+    const $data = $context.$data || {};
+    const refs = this.dereferences || [];
+    let leaf = this.token;
+    let i, n, root;
+
+    if (Object.hasOwnProperty.call($data, leaf)) {
+      root = $data;
+    } else if (Object.hasOwnProperty.call($context, leaf)) {
+      root = $context;
+    } else if (Object.hasOwnProperty.call(globals, leaf)) {
+      root = globals;
+    } else {
+      throw new Error('Identifier::set_value -- ' +
+        "The property '" + leaf + "' does not exist " +
+        'on the $data, $context, or globals.')
+    }
+
+    // Degenerate case. {$data|$context|global}[leaf] = something;
+    n = refs.length;
+    if (n === 0) {
+      this.assign(root, leaf, new_value);
+      return
+    }
+
+    // First dereference is {$data|$context|global}[token].
+    root = root[leaf];
+
+    // We cannot use this.dereference because that gives the leaf; to evoke
+    // the ES5 setter we have to call `obj[leaf] = new_value`
+    for (i = 0; i < n - 1; ++i) {
+      leaf = refs[i];
+      if (leaf instanceof Arguments) {
+        root = root();
+      } else {
+        root = root[Node.value_of(leaf)];
+      }
+    }
+
+    // We indicate that a dereference is a function when it is `true`.
+    if (refs[i] === true) {
+      throw new Error('Cannot assign a value to a function.')
+    }
+
+    // Call the setter for the leaf.
+    if (refs[i]) {
+      this.assign(root, Node.value_of(refs[i]), new_value);
+    }
+  };
+
+  /**
+   * Determine if a character is a valid item in an identifier.
+   * Note that we do not check whether the first item is a number, nor do we
+   * support unicode identifiers here.
+   *
+   * From:  http://stackoverflow.com/a/9337047
+   * @param  {String}  ch  The character
+   * @return {Boolean}     True if this is a valid identifier
+   */
+  // function is_identifier_char(ch) {
+  //   return (ch >= 'A' && ch <= 'Z') ||
+  //          (ch >= 'a' && ch <= 'z') ||
+  //          (ch >= '0' && ch <= 9) ||
+  //           ch === '_' || ch === '$';
+  // }
+  static is_valid_start_char (ch) {
+    return IDStart.test(ch)
+  }
+
+  static is_valid_continue_char (ch) {
+    return IDContinue.test(ch)
+  }
+
+  get [Node.isExpressionOrIdentifierSymbol] () { return true }
+}
+
+class Ternary {
+  constructor (yes, no) {
+    Object.assign(this, {yes, no});
+  }
+
+  get_value () { return this }
+
+  get [Node.isExpressionOrIdentifierSymbol] () { return true }
+}
+
+/**
+ * Originally based on (public domain):
+ * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js
+ */
+
+const escapee = {
+  "'": "'",
+  '"': '"',
+  '`': '`',
+  '\\': '\\',
+  '/': '/',
+  '$': '$',
+  b: '\b',
+  f: '\f',
+  n: '\n',
+  r: '\r',
+  t: '\t'
+};
+
+/**
+ * Construct a new Parser instance with new Parser(node, context)
+ * @param {Node} node    The DOM element from which we parsed the
+ *                         content.
+ * @param {object} context The Knockout context.
+ * @param {object} globals An object containing any desired globals.
+ */
+class Parser {
+  white () {
+    var ch = this.ch;
+    while (ch && ch <= ' ') {
+      ch = this.next();
+    }
+    return this.comment(ch)
+  }
+
+/**
+ * Slurp any C or C++ style comments
+ */
+  comment (ch) {
+    if (ch !== '/') { return ch }
+    var p = this.at;
+    var second = this.lookahead();
+    if (second === '/') {
+      while (ch) {
+        ch = this.next();
+        if (ch === '\n' || ch === '\r') { break }
+      }
+      ch = this.next();
+    } else if (second === '*') {
+      while (ch) {
+        ch = this.next();
+        if (ch === '*' && this.lookahead() === '/') {
+          this.next();
+          break
+        }
+      }
+      if (!ch) {
+        this.error('Unclosed comment, starting at character ' + p);
+      }
+      this.next();
+      return this.white()
+    }
+    return ch
+  };
+
+  next (c) {
+    if (c && c !== this.ch) {
+      this.error("Expected '" + c + "' but got '" + this.ch + "'");
+    }
+    this.ch = this.text.charAt(this.at);
+    this.at += 1;
+    return this.ch
+  }
+
+  lookahead () {
+    return this.text[this.at]
+  }
+
+  error (m) {
+    if (m instanceof Error) { throw m }
+    let [name, msg] = m.name ? [m.name, m.message] : [m, ''];
+    const message = `\n${name} ${msg} of
+    ${this.text}\n` + Array(this.at).join(' ') + '_/ 🔥 \\_\n';
+    throw new Error(message)
+  }
+
+  name () {
+  // A name of a binding
+    var name = '';
+    var enclosedBy;
+    this.white();
+
+    var ch = this.ch;
+
+    if (ch === "'" || ch === '"') {
+      enclosedBy = ch;
+      ch = this.next();
+    }
+
+    while (ch) {
+      if (enclosedBy && ch === enclosedBy) {
+        this.white();
+        ch = this.next();
+        if (ch !== ':' && ch !== ',') {
+          this.error(
+          'Object name: ' + name + ' missing closing ' + enclosedBy
+        );
+        }
+        return name
+      } else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {
+        return name
+      }
+      name += ch;
+      ch = this.next();
+    }
+
+    return name
+  }
+
+  number () {
+    let number;
+    let string = '';
+    let ch = this.ch;
+
+    if (ch === '-') {
+      string = '-';
+      ch = this.next('-');
+    }
+    while (ch >= '0' && ch <= '9') {
+      string += ch;
+      ch = this.next();
+    }
+    if (ch === '.') {
+      string += '.';
+      ch = this.next();
+      while (ch && ch >= '0' && ch <= '9') {
+        string += ch;
+        ch = this.next();
+      }
+    }
+    if (ch === 'e' || ch === 'E') {
+      string += ch;
+      ch = this.next();
+      if (ch === '-' || ch === '+') {
+        string += ch;
+        ch = this.next();
+      }
+      while (ch >= '0' && ch <= '9') {
+        string += ch;
+        ch = this.next();
+      }
+    }
+    number = +string;
+    if (!isFinite(number)) {
+      options.onError(new Error('Bad number: ' + number + ' in ' + string));
+    } else {
+      return number
+    }
+  }
+
+/**
+ * Add a property to 'object' that equals the given value.
+ * @param  {Object} object The object to add the value to.
+ * @param  {String} key    object[key] is set to the given value.
+ * @param  {mixed}  value  The value, may be a primitive or a function. If a
+ *                         function it is unwrapped as a property.
+ */
+  objectAddValue (object, key, value) {
+    if (value && value[Node.isExpressionOrIdentifierSymbol]) {
+      Object.defineProperty(object, key, {
+        get: () => Node.value_of(value, ...this.currentContextGlobals),
+        enumerable: true
+      });
+    } else if (Array.isArray(value)) {
+      Object.defineProperty(object, key, {
+        get: () => value.map(v => Node.value_of(v, ...this.currentContextGlobals)),
+        enumerable: true
+      });
+    } else {
+    // primitives
+      object[key] = value;
+    }
+  }
+
+  object () {
+    let key;
+    let object = {};
+    let ch = this.ch;
+
+    if (ch === '{') {
+      this.next('{');
+      ch = this.white();
+      if (ch === '}') {
+        ch = this.next('}');
+        return object
+      }
+      while (ch) {
+        if (ch === '"' || ch === "'" || ch === '`') {
+          key = this.string();
+        } else {
+          key = this.name();
+        }
+        this.white();
+        ch = this.next(':');
+        if (Object.hasOwnProperty.call(object, key)) {
+          this.error('Duplicate key "' + key + '"');
+        }
+
+        this.objectAddValue(object, key, this.expression());
+
+        ch = this.white();
+        if (ch === '}') {
+          ch = this.next('}');
+          return object
+        }
+
+        this.next(',');
+        ch = this.white();
+      }
+    }
+    this.error('Bad object');
+  }
+
+/**
+ * Read up to delim and return the string
+ * @param  {string} delim The delimiter, either ' or "
+ * @return {string}       The string read.
+ */
+  readString (delim) {
+    let string = '';
+    let nodes = [''];
+    let plusOp = operators['+'];
+    let hex;
+    let i;
+    let uffff;
+    let interpolate = delim === '`';
+    let ch = this.next();
+
+    while (ch) {
+      if (ch === delim) {
+        ch = this.next();
+        if (interpolate) { nodes.push(plusOp); }
+        nodes.push(string);
+        return nodes
+      }
+      if (ch === '\\') {
+        ch = this.next();
+        if (ch === 'u') {
+          uffff = 0;
+          for (i = 0; i < 4; i += 1) {
+            hex = parseInt(ch = this.next(), 16);
+            if (!isFinite(hex)) {
+              break
+            }
+            uffff = uffff * 16 + hex;
+          }
+          string += String.fromCharCode(uffff);
+        } else if (typeof escapee[ch] === 'string') {
+          string += escapee[ch];
+        } else {
+          break
+        }
+      } else if (interpolate && ch === '$') {
+        ch = this.next();
+        if (ch === '{') {
+          this.next('{');
+          nodes.push(plusOp);
+          nodes.push(string);
+          nodes.push(plusOp);
+          nodes.push(this.expression());
+          string = '';
+        // this.next('}');
+        } else {
+          string += '$' + ch;
+        }
+      } else {
+        string += ch;
+      }
+      ch = this.next();
+    }
+
+    this.error('Bad string');
+  }
+
+  string () {
+    var ch = this.ch;
+    if (ch === '"') {
+      return this.readString('"').join('')
+    } else if (ch === "'") {
+      return this.readString("'").join('')
+    } else if (ch === '`') {
+      return Node.create_root(this.readString('`'))
+    }
+
+    this.error('Bad string');
+  }
+
+  array () {
+    let array = [];
+    let ch = this.ch;
+
+    if (ch === '[') {
+      ch = this.next('[');
+      this.white();
+      if (ch === ']') {
+        ch = this.next(']');
+        return array
+      }
+      while (ch) {
+        array.push(this.expression());
+        ch = this.white();
+        if (ch === ']') {
+          ch = this.next(']');
+          return array
+        }
+        this.next(',');
+        ch = this.white();
+      }
+    }
+    this.error('Bad array');
+  }
+
+  value () {
+    var ch;
+    this.white();
+    ch = this.ch;
+    switch (ch) {
+      case '{': return this.object()
+      case '[': return this.array()
+      case '"': case "'": case '`': return this.string()
+      case '-': return this.number()
+      default:
+        return ch >= '0' && ch <= '9' ? this.number() : this.identifier()
+    }
+  }
+
+/**
+ * Get the function for the given operator.
+ * A `.precedence` value is added to the function, with increasing
+ * precedence having a higher number.
+ * @return {function} The function that performs the infix operation
+ */
+  operator (opts) {
+    let op = '';
+    let opFn;
+    let ch = this.white();
+    let isIdentifierChar = Identifier.is_valid_start_char;
+
+    while (ch) {
+      if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||
+        ch === '"' || ch === "'" || ch === '{' || ch === '(' ||
+        ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {
+        break
+      }
+
+      if (!opts.not_an_array && ch === '[') {
+        break
+      }
+
+      op += ch;
+      ch = this.next();
+
+    // An infix followed by the prefix e.g. a + @b
+    // TODO: other prefix unary operators
+      if (ch === '@') {
+        break
+      }
+
+      isIdentifierChar = Identifier.is_valid_continue_char;
+    }
+
+    if (op !== '') {
+      if (opts.prefix && op === '-') { op = '&-'; }
+      opFn = operators[op];
+
+      if (!opFn) {
+        this.error("Bad operator: '" + op + "'.");
+      }
+    }
+
+    return opFn
+  }
+
+/**
+ * Filters
+ * Returns what the Node interprets as an "operator".
+ * e.g.
+ *   <span data-bind="text: name | fit:20 | uppercase"></span>
+ */
+  filter () {
+    let ch = this.next();
+    let args = [];
+    let nextFilter = function (v) { return v };
+    let name = this.name();
+
+    if (!options.filters[name]) {
+      options.onError('Cannot find filter by the name of: ' + name);
+    }
+
+    ch = this.white();
+
+    while (ch) {
+      if (ch === ':') {
+        ch = this.next();
+        args.push(this.expression('|'));
+      }
+
+      if (ch === '|') {
+        nextFilter = this.filter();
+        break
+      }
+
+      if (ch === ',') { break }
+
+      ch = this.white();
+    }
+
+    var filter = function filter (value, ignored, context, globals, node) {
+      var argValues = [value];
+
+      for (var i = 0, j = args.length; i < j; ++i) {
+        argValues.push(Node.value_of(args[i], context, globals, node));
+      }
+
+      return nextFilter(options.filters[name].apply(null, argValues))
+    };
+
+  // Lowest precedence.
+    filter.precedence = 1;
+    return filter
+  }
+
+/**
+ * Parse an expression – builds an operator tree, in something like
+ * Shunting-Yard.
+ *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm
+ *
+ * @return {function}   A function that computes the value of the expression
+ *                      when called or a primitive.
+ */
+  expression (filterable) {
+    let op;
+    let nodes = [];
+    let ch = this.white();
+
+    while (ch) {
+    // unary prefix operators
+      op = this.operator({ prefix: true });
+      if (op) {
+        nodes.push(undefined);  // LHS Tree node.
+        nodes.push(op);
+        ch = this.white();
+      }
+
+      if (ch === '(') {
+        this.next();
+        nodes.push(this.expression());
+        this.next(')');
+      } else {
+        nodes.push(this.value());
+      }
+      ch = this.white();
+
+      if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||
+        ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {
+        break
+      }
+
+    // filters
+      if (ch === '|' && this.lookahead() !== '|' && filterable) {
+        nodes.push(this.filter());
+        nodes.push(undefined);
+        break
+      }
+
+    // infix or postfix operators
+      op = this.operator({ not_an_array: true });
+
+      if (op === operators['?']) {
+        this.ternary(nodes);
+        break
+      } else if (op === operators['.']) {
+        nodes.push(op);
+        nodes.push(this.member());
+        op = null;
+      } else if (op === operators['[']) {
+        nodes.push(op);
+        nodes.push(this.expression());
+        ch = this.next(']');
+        op = null;
+      } else if (op) {
+        nodes.push(op);
+      }
+
+      ch = this.white();
+
+      if (ch === ']' || (!op && ch === '(')) { break }
+    }
+
+    if (nodes.length === 0) {
+      return undefined
+    }
+
+    var dereferences = this.dereferences();
+
+    if (nodes.length === 1 && !dereferences.length) {
+      return nodes[0]
+    }
+
+    for (var i = 0, j = dereferences.length; i < j; ++i) {
+      var deref = dereferences[i];
+      if (deref.constructor === Arguments) {
+        nodes.push(operators.call);
+      } else {
+        nodes.push(operators['.']);
+      }
+      nodes.push(deref);
+    }
+
+    return new Expression(nodes)
+  }
+
+  ternary (nodes) {
+    var ternary = new Ternary();
+    ternary.yes = this.expression();
+    this.next(':');
+    ternary.no = this.expression();
+    nodes.push(operators['?']);
+    nodes.push(ternary);
+  }
+
+/**
+ * Parse the arguments to a function, returning an Array.
+ *
+ */
+  funcArguments () {
+    let args = [];
+    let ch = this.next('(');
+
+    while (ch) {
+      ch = this.white();
+      if (ch === ')') {
+        this.next(')');
+        return new Arguments(this, args)
+      } else {
+        args.push(this.expression());
+        ch = this.white();
+      }
+      if (ch !== ')') { this.next(','); }
+    }
+
+    this.error('Bad arguments to function');
+  }
+
+/**
+ * The literal string reference `abc` in an `x.abc` expression.
+ */
+  member () {
+    let member = '';
+    let ch = this.white();
+    let isIdentifierChar = Identifier.is_valid_start_char;
+
+    while (ch) {
+      if (!isIdentifierChar(ch)) {
+        break
+      }
+      member += ch;
+      ch = this.next();
+      isIdentifierChar = Identifier.is_valid_continue_char;
+    }
+    return member
+  }
+
+/**
+ * A dereference applies to an identifer, being either a function
+ * call "()" or a membership lookup with square brackets "[member]".
+ * @return {fn or undefined}  Dereference function to be applied to the
+ *                            Identifier
+ */
+  dereference () {
+    let member;
+    let ch = this.white();
+
+    while (ch) {
+      if (ch === '(') {
+      // a(...) function call
+        return this.funcArguments()
+      } else if (ch === '[') {
+      // a[x] membership
+        this.next('[');
+        member = this.expression();
+        this.white();
+        this.next(']');
+
+        return member
+      } else if (ch === '.') {
+      // a.x membership
+        this.next('.');
+        return this.member()
+      } else {
+        break
+      }
+    }
+  }
+
+  dereferences () {
+    let ch = this.white();
+    let dereferences = [];
+    let deref;
+
+    while (ch) {
+      deref = this.dereference();
+      if (deref !== undefined) {
+        dereferences.push(deref);
+      } else {
+        break
+      }
+    }
+    return dereferences
+  }
+
+  identifier () {
+    let token = '';
+    let isIdentifierChar = Identifier.is_valid_start_char;
+    let ch = this.white();
+
+    while (ch) {
+      if (!isIdentifierChar(ch)) {
+        break
+      }
+      token += ch;
+      ch = this.next();
+      isIdentifierChar = Identifier.is_valid_continue_char;
+    }
+    switch (token) {
+      case 'true': return true
+      case 'false': return false
+      case 'null': return null
+      case 'undefined': return void 0
+      case 'function':
+        throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.')
+    // return this.anonymous_fn();
+    }
+    return new Identifier(this, token, this.dereferences())
+  }
+
+  readBindings () {
+    let key;
+    let bindings = {};
+    let sep;
+    let expr;
+    let ch = this.ch;
+
+    while (ch) {
+      key = this.name();
+      sep = this.white();
+
+      if (!sep || sep === ',') {
+        if (sep) {
+          ch = this.next(',');
+        } else {
+          ch = '';
+        }
+      // A "bare" binding e.g. "text"; substitute value of 'null'
+      // so it becomes "text: null".
+        bindings[key] = null;
+      } else {
+        if (key.indexOf('.') !== -1) {
+        // Namespaced – i.e.
+        //    `attr.css: x` becomes `attr: { css: x }`
+        //     ^^^ - key
+          key = key.split('.');
+          bindings[key[0]] = bindings[key[0]] || {};
+
+          if (key.length !== 2) {
+            options.onError('Binding ' + key + ' should have two parts (a.b).');
+          } else if (bindings[key[0]].constructor !== Object) {
+            options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');
+          }
+
+          ch = this.next(':');
+          this.objectAddValue(bindings[key[0]], key[1], this.expression(true));
+        } else {
+          ch = this.next(':');
+          if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {
+          // Extend a namespaced bindings e.g. we've previously seen
+          // on.x, now we're seeing on: { 'abc' }.
+            expr = this.expression(true);
+            if (typeof expr !== 'object' || expr.constructor !== Object) {
+              options.onError('Expected plain object for ' + key + ' value.');
+            } else {
+              extend(bindings[key], expr);
+            }
+          } else {
+            bindings[key] = this.expression(true);
+          }
+        }
+
+        this.white();
+        if (this.ch) {
+          ch = this.next(',');
+        } else {
+          ch = '';
+        }
+      }
+    }
+    return bindings
+  }
+
+  valueAsAccessor (value, context, globals, node) {
+    if (!value) { return () => value }
+    if (typeof value === 'function') { return value }
+
+    if (value[Node.isExpressionOrIdentifierSymbol]) {
+      return () => Node.value_of(value, context, globals, node)
+    }
+
+    if (Array.isArray(value)) {
+      return () => value.map(v => Node.value_of(v, context, globals, node))
+    }
+
+    if (typeof (value) !== 'function') {
+      return () => clonePlainObjectDeep(value)
+    }
+
+    throw new Error('Value has cannot be converted to accessor: ' + value)
+  }
+
+  /**
+  * Convert result[name] from a value to a function (i.e. `valueAccessor()`)
+  * @param  {object} result [Map of top-level names to values]
+  * @return {object}        [Map of top-level names to functions]
+  *
+  * Accessors may be one of (below) constAccessor, identifierAccessor,
+  * expressionAccessor, or nodeAccessor.
+  */
+  convertToAccessors (result, context, globals, node) {
+    objectForEach(result, (name, value) => {
+      if (value instanceof Identifier) {
+        // Return a function that, with no arguments returns
+        // the value of the identifier, otherwise sets the
+        // value of the identifier to the first given argument.
+        Object.defineProperty(result, name, {
+          value: function (optionalValue, options$$1) {
+            const currentValue = value.get_value(undefined, context, globals, node);
+            if (arguments.length === 0) { return currentValue }
+            const unchanged = optionalValue === currentValue;
+            if (options$$1 && options$$1.onlyIfChanged && unchanged) { return }
+            return value.set_value(optionalValue, context, globals)
+          }
+        });
+      } else {
+        result[name] = this.valueAsAccessor(value, context, globals, node);
+      }
+    });
+    return result
+  }
+
+  runParse (source, fn) {
+    this.text = (source || '').trim();
+    this.at = 0;
+    this.ch = ' ';
+
+    try {
+      var result = fn();
+      this.white();
+      if (this.ch) {
+        this.error('Syntax Error');
+      }
+      return result
+    } catch (e) {
+      options.onError(e);
+    }
+  }
+
+  /**
+   * Get the bindings as name: accessor()
+   * @param  {string} source The binding string to parse.
+   * @return {object}        Map of name to accessor function.
+   */
+  parse (source, context = {}, globals = {}, node) {
+    if (!source) { return () => null }
+    this.currentContextGlobals = [context, globals, node];
+    const parseFn = () => this.readBindings();
+    const bindingAccessors = this.runParse(source, parseFn);
+    return this.convertToAccessors(bindingAccessors, context, globals, node)
+  }
+
+  /**
+   * Return a function that evaluates and returns the result of the expression.
+   */
+  parseExpression (source, context = {}, globals = {}, node) {
+    if (!source) { return () => '' }
+    this.currentContextGlobals = [context, globals, node];
+    const parseFn = () => this.expression(true);
+    const bindingAccessors = this.runParse(source, parseFn);
+    return this.valueAsAccessor(bindingAccessors, context, globals, node)
+  }
+}
+
+/* eslint no-cond-assign: 0 */
+
+// The following regular expressions will be used to split an object-literal string into tokens
+
+// These two match strings, either with double quotes or single quotes
+var stringDouble = '"(?:[^"\\\\]|\\\\.)*"';
+var stringSingle = "'(?:[^'\\\\]|\\\\.)*'";
+var stringRegexp = '/(?:[^/\\\\]|\\\\.)*/\w*';
+var specials = ',"\'{}()/:[\\]';
+var everyThingElse = '[^\\s:,/][^' + specials + ']*[^\\s' + specials + ']';
+var oneNotSpace = '[^\\s]';
+var bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');
+var divisionLookBehind = /[\])"'A-Za-z0-9_$]+$/;
+var keywordRegexLookBehind = {
+    'in': 1,
+    'return': 1,
+    'typeof': 1
+  };
+
+/**
+ * Break a binding string (data-bind='x: val, y: ..') into a stable array
+ * of {key: value}.
+ */
+function parseObjectLiteral(objectLiteralString) {
+  // Trim leading and trailing spaces from the string
+  var str = stringTrim(objectLiteralString);
+
+  // Trim braces '{' surrounding the whole object literal
+  if (str.charCodeAt(0) === 123) str = str.slice(1, -1);
+
+  // Split into tokens
+  var result = [],
+    toks = str.match(bindingToken),
+    key, values = [],
+    depth = 0;
+
+  if (!toks) { return [] }
+
+  // Append a comma so that we don't need a separate code block to deal with the last item
+  toks.push(',');
+
+  for (var i = 0, tok; tok = toks[i]; ++i) {
+    var c = tok.charCodeAt(0);
+    // A comma signals the end of a key/value pair if depth is zero
+    if (c === 44) { // ","
+      if (depth <= 0) {
+        result.push((key && values.length) ? {
+          key: key,
+          value: values.join('')
+        } : {
+          'unknown': key || values.join('')
+        });
+        key = depth = 0;
+        values = [];
+        continue;
+      }
+      // Simply skip the colon that separates the name and value
+    } else if (c === 58) { // ":"
+      if (!depth && !key && values.length === 1) {
+        key = values.pop();
+        continue;
+      }
+      // A set of slashes is initially matched as a regular expression, but could be division
+    } else if (c === 47 && i && tok.length > 1) { // "/"
+      // Look at the end of the previous token to determine if the slash is actually division
+      var match = toks[i - 1].match(divisionLookBehind);
+      if (match && !keywordRegexLookBehind[match[0]]) {
+        // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)
+        str = str.substr(str.indexOf(tok) + 1);
+        toks = str.match(bindingToken);
+        toks.push(',');
+        i = -1;
+        // Continue with just the slash
+        tok = '/';
+      }
+      // Increment depth for parentheses, braces, and brackets so that interior commas are ignored
+    } else if (c === 40 || c === 123 || c === 91) { // '(', '{', '['
+      ++depth;
+    } else if (c === 41 || c === 125 || c === 93) { // ')', '}', ']'
+      --depth;
+      // The key will be the first token; if it's a string, trim the quotes
+    } else if (!key && !values.length && (c === 34 || c === 39)) { // '"', "'"
+      tok = tok.slice(1, -1);
+    }
+    values.push(tok);
+  }
+
+  return result;
+}
+
+class BindingHandlerObject {
+  set (nameOrObject, value) {
+    if (typeof nameOrObject === 'string') {
+      this[nameOrObject] = value;
+    } else if (typeof nameOrObject === 'object') {
+      if (value !== undefined) {
+        options.onError(
+          new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));
+      }
+      Object.assign(this, nameOrObject);
+    } else {
+      options.onError(
+        new Error('Given a bad binding handler type: ' + nameOrObject));
+    }
+  }
+
+  /**
+   * The handler may have a `.` in it, e.g. `attr.title`, in which case the
+   * handler is `attr`.  Otherwise it's the name given
+   */
+  get (nameOrDotted) {
+    const [name] = nameOrDotted.split('.');
+    return this[name]
+  }
+}
+
+class Provider {
+  constructor (params = {}) {
+    if (this.constructor === Provider) {
+      throw new Error('Provider is an abstract base class.')
+    }
+    if (!('FOR_NODE_TYPES' in this)) {
+      // FOR_NODE_TYPES must return a list of integers corresponding to the
+      // node.nodeType's that the provider handles.
+      throw new Error('Providers must have FOR_NODE_TYPES property')
+    }
+    this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();
+    this.globals = params.globals || {};
+  }
+
+  nodeHasBindings (/* node */) {}
+  getBindingAccessors (/* node, context */) {}
+  preprocessNode (/* node */) {}
+  postProcess (/* node */) {}
+}
+
+/**
+ * BindingStringProvider is an abstract base class parses a binding string.
+ *
+ * Children must implement `nodeHasBindings` and `getBindingString`.
+ */
+class BindingStringProvider extends Provider {
+  /** Call bindingHandler.preprocess on each respective binding string.
+   *
+   * The `preprocess` property of bindingHandler must be a static
+   * function (i.e. on the object or constructor).
+   */
+  * processBinding (key, value) {
+    // Get the "on" binding from "on.click"
+    const [handlerName, property] = key.split('.');
+    const handler = this.bindingHandlers.get(handlerName);
+
+    if (handler && handler.preprocess) {
+      const bindingsAddedByHandler = [];
+      const chainFn = (...args) => bindingsAddedByHandler.push(args);
+      value = handler.preprocess(value, key, chainFn);
+      for (const [key, value] of bindingsAddedByHandler) {
+        yield * this.processBinding(key, value);
+      }
+    } else if (property) {
+      value = `{${property}:${value}}`;
+    }
+
+    yield `${handlerName}:${value}`;
+  }
+
+  * generateBindingString (bindingString) {
+    for (const {key, unknown, value} of parseObjectLiteral(bindingString)) {
+      yield * this.processBinding(key || unknown, value);
+    }
+  }
+
+  preProcessBindings (bindingString) {
+    return Array.from(this.generateBindingString(bindingString)).join(',')
+  }
+
+  getBindingAccessors (node, context) {
+    const bindingString = node && this.getBindingString(node);
+    if (!bindingString) { return }
+    const processed = this.preProcessBindings(bindingString);
+    return new Parser().parse(processed, context, this.globals, node)
+  }
+
+  getBindingString () { throw new Error('Overload getBindingString.') }
+}
+
+class VirtualProvider extends BindingStringProvider {
+  get FOR_NODE_TYPES () { return [ 8 ] } // document.COMMENT_NODE
+
+  getBindingString (node) {
+    if (node.nodeType === document.COMMENT_NODE) {
+      return virtualElements.virtualNodeBindingValue(node)
+    }
+  }
+
+  nodeHasBindings (node) {
+    if (node.nodeType === document.COMMENT_NODE) {
+      return virtualElements.isStartComment(node)
+    }
+  }
+}
+
+class DataBindProvider extends BindingStringProvider {
+  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE
+
+  get BIND_ATTRIBUTE () {
+    return 'data-bind'
+  }
+
+  getBindingString (node) {
+    if (node.nodeType === document.ELEMENT_NODE) {
+      return node.getAttribute(this.BIND_ATTRIBUTE)
+    }
+  }
+
+  nodeHasBindings (node) {
+    if (node.nodeType === document.ELEMENT_NODE) {
+      return node.hasAttribute(this.BIND_ATTRIBUTE)
+    }
+  }
+}
+
+'use strict';
+
+const SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');
+const ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');
+
+class LifeCycle {
+  // NOTE: For more advanced integration as an ES6 mixin, see e.g.:
+  // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/
+
+  /**
+   * Copy the properties of the LifeCycle class to the target (or its prototype)
+   *
+   * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.
+   */
+  static mixInto (Constructor) {
+    const target = Constructor.prototype || Constructor;
+    const mixin = LifeCycle.prototype;
+    for (let prop of Object.getOwnPropertyNames(mixin)) {
+      target[prop] = mixin[prop];
+    }
+  }
+
+  subscribe (observable, action) {
+    if (typeof action === 'string') { action = this[action].bind(this); }
+    this.addDisposable(observable.subscribe(action));
+  }
+
+  computed (params) {
+    if (typeof params === 'string') {
+      params = { read: this[params], write: this[params], owner: this };
+    } else if (typeof params === 'object') {
+      // Pass directly.
+    } else if (typeof params === 'function') {
+      params = { read: params, write: params };
+    } else {
+      throw new Error('LifeCycle::computed not given a valid type.')
+    }
+
+    params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];
+    return this.addDisposable(computed(params))
+  }
+
+  /**
+   * Add an event listener for the given or anchored node.
+   * @param {node} [node] (optional) The target node (otherwise the anchored node)
+   * @param {string} [type] Event type
+   * @param {function|string} [action] Either call the given function or `this[action]`
+   * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`
+   */
+  addEventListener (...args) {
+    const node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];
+    const [type, act, options$$1] = args;
+    const handler = typeof act === 'string' ? this[act].bind(this) : act;
+    this.__addEventListener(node, type, handler, options$$1);
+  }
+
+  __addEventListener (node, eventType, handler, options$$1) {
+    node.addEventListener(eventType, handler, options$$1);
+    function dispose () { node.removeEventListener(eventType, handler); }
+    addDisposeCallback(node, dispose);
+    this.addDisposable({ dispose });
+  }
+
+  anchorTo (node) {
+    addDisposeCallback(node, () => this.dispose());
+    this[ANCHOR_NODE] = node;
+  }
+
+  dispose () {
+    const subscriptions = this[SUBSCRIPTIONS] || [];
+    subscriptions.forEach(s => s.dispose());
+    this[SUBSCRIPTIONS] = [];
+    this[ANCHOR_NODE] = null;
+  }
+
+  addDisposable (subscription) {
+    const subscriptions = this[SUBSCRIPTIONS] || [];
+    if (!this[SUBSCRIPTIONS]) { this[SUBSCRIPTIONS] = subscriptions; }
+    if (typeof subscription.dispose !== 'function') {
+      throw new Error('Lifecycle::addDisposable argument missing `dispose`.')
+    }
+    subscriptions.push(subscription);
+    return subscription
+  }
+}
+
+var loadingSubscribablesCache = {};
+var loadedDefinitionsCache = {};    // Tracks component loads that have already completed
+
+function loadComponentAndNotify(componentName, callback) {
+    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),
+        completedAsync;
+    if (!_subscribable) {
+        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
+        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();
+        _subscribable.subscribe(callback);
+
+        beginLoadingComponent(componentName, function(definition, config) {
+            var isSynchronousComponent = !!(config && config.synchronous);
+            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };
+            delete loadingSubscribablesCache[componentName];
+
+            // For API consistency, all loads complete asynchronously. However we want to avoid
+            // adding an extra task schedule if it's unnecessary (i.e., the completion is already
+            // async).
+            //
+            // You can bypass the 'always asynchronous' feature by putting the synchronous:true
+            // flag on your component configuration when you register it.
+            if (completedAsync || isSynchronousComponent) {
+                // Note that notifySubscribers ignores any dependencies read within the callback.
+                // See comment in loaderRegistryBehaviors.js for reasoning
+                _subscribable.notifySubscribers(definition);
+            } else {
+                tasks.schedule(function() {
+                    _subscribable.notifySubscribers(definition);
+                });
+            }
+        });
+        completedAsync = true;
+    } else {
+        _subscribable.subscribe(callback);
+    }
+}
+
+function beginLoadingComponent(componentName, callback) {
+    getFirstResultFromLoaders('getConfig', [componentName], function(config) {
+        if (config) {
+            // We have a config, so now load its definition
+            getFirstResultFromLoaders('loadComponent', [componentName, config], function(definition) {
+                callback(definition, config);
+            });
+        } else {
+            // The component has no config - it's unknown to all the loaders.
+            // Note that this is not an error (e.g., a module loading error) - that would abort the
+            // process and this callback would not run. For this callback to run, all loaders must
+            // have confirmed they don't know about this component.
+            callback(null, null);
+        }
+    });
+}
+
+function getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {
+    // On the first call in the stack, start with the full set of loaders
+    if (!candidateLoaders) {
+        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array
+    }
+
+    // Try the next candidate
+    var currentCandidateLoader = candidateLoaders.shift();
+    if (currentCandidateLoader) {
+        var methodInstance = currentCandidateLoader[methodName];
+        if (methodInstance) {
+            var wasAborted = false,
+                synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {
+                    if (wasAborted) {
+                        callback(null);
+                    } else if (result !== null) {
+                        // This candidate returned a value. Use it.
+                        callback(result);
+                    } else {
+                        // Try the next candidate
+                        getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
+                    }
+                }));
+
+            // Currently, loaders may not return anything synchronously. This leaves open the possibility
+            // that we'll extend the API to support synchronous return values in the future. It won't be
+            // a breaking change, because currently no loader is allowed to return anything except undefined.
+            if (synchronousReturnValue !== undefined) {
+                wasAborted = true;
+
+                // Method to suppress exceptions will remain undocumented. This is only to keep
+                // KO's specs running tidily, since we can observe the loading got aborted without
+                // having exceptions cluttering up the console too.
+                if (!currentCandidateLoader.suppressLoaderExceptions) {
+                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');
+                }
+            }
+        } else {
+            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.
+            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
+        }
+    } else {
+        // No candidates returned a value
+        callback(null);
+    }
+}
+
+var registry = {
+  get (componentName, callback) {
+    var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);
+    if (cachedDefinition) {
+      // It's already loaded and cached. Reuse the same definition object.
+      // Note that for API consistency, even cache hits complete asynchronously by default.
+      // You can bypass this by putting synchronous:true on your component config.
+      if (cachedDefinition.isSynchronousComponent) {
+        dependencyDetection.ignore(function() { // See comment in loaderRegistryBehaviors.js for reasoning
+            callback(cachedDefinition.definition);
+        });
+      } else {
+        tasks.schedule(function() { callback(cachedDefinition.definition); });
+      }
+    } else {
+      // Join the loading process that is already underway, or start a new one.
+      loadComponentAndNotify(componentName, callback);
+    }
+  },
+
+  clearCachedDefinition (componentName) {
+    delete loadedDefinitionsCache[componentName];
+  },
+
+  _getFirstResultFromLoaders: getFirstResultFromLoaders,
+
+  loaders: []
+};
+
+// The default loader is responsible for two things:
+// 1. Maintaining the default in-memory registry of component configuration objects
+//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))
+// 2. Answering requests for components by fetching configuration objects
+//    from that default in-memory registry and resolving them into standard
+//    component definition objects (of the form { createViewModel: ..., template: ... })
+// Custom loaders may override either of these facilities, i.e.,
+// 1. To supply configuration objects from some other source (e.g., conventions)
+// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.
+
+var defaultConfigRegistry = {};
+
+function register(componentName, config) {
+    if (!config) {
+        throw new Error('Invalid configuration for ' + componentName);
+    }
+
+    if (isRegistered(componentName)) {
+        throw new Error('Component ' + componentName + ' is already registered');
+    }
+
+    defaultConfigRegistry[componentName] = config;
+}
+
+function isRegistered(componentName) {
+    return defaultConfigRegistry.hasOwnProperty(componentName);
+}
+
+function unregister(componentName) {
+    delete defaultConfigRegistry[componentName];
+    registry.clearCachedDefinition(componentName);
+}
+
+var defaultLoader = {
+    getConfig: function(componentName, callback) {
+        var result = defaultConfigRegistry.hasOwnProperty(componentName)
+            ? defaultConfigRegistry[componentName]
+            : null;
+        callback(result);
+    },
+
+    loadComponent: function(componentName, config, callback) {
+        var errorCallback = makeErrorCallback(componentName);
+        possiblyGetConfigFromAmd(errorCallback, config, function(loadedConfig) {
+            resolveConfig(componentName, errorCallback, loadedConfig, callback);
+        });
+    },
+
+    loadTemplate: function(componentName, templateConfig, callback) {
+        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);
+    },
+
+    loadViewModel: function(componentName, viewModelConfig, callback) {
+        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);
+    }
+};
+
+var createViewModelKey = 'createViewModel';
+
+// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
+// into the standard component definition format:
+//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
+// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
+// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
+// so this is implemented manually below.
+function resolveConfig(componentName, errorCallback, config, callback) {
+    var result = {},
+        makeCallBackWhenZero = 2,
+        tryIssueCallback = function() {
+            if (--makeCallBackWhenZero === 0) {
+                callback(result);
+            }
+        },
+        templateConfig = config['template'],
+        viewModelConfig = config['viewModel'];
+
+    if (templateConfig) {
+        possiblyGetConfigFromAmd(errorCallback, templateConfig, function(loadedConfig) {
+            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function(resolvedTemplate) {
+                result['template'] = resolvedTemplate;
+                tryIssueCallback();
+            });
+        });
+    } else {
+        tryIssueCallback();
+    }
+
+    if (viewModelConfig) {
+        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function(loadedConfig) {
+            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function(resolvedViewModel) {
+                result[createViewModelKey] = resolvedViewModel;
+                tryIssueCallback();
+            });
+        });
+    } else {
+        tryIssueCallback();
+    }
+}
+
+function resolveTemplate(errorCallback, templateConfig, callback) {
+    if (typeof templateConfig === 'string') {
+        // Markup - parse it
+        callback(parseHtmlFragment(templateConfig));
+    } else if (templateConfig instanceof Array) {
+        // Assume already an array of DOM nodes - pass through unchanged
+        callback(templateConfig);
+    } else if (isDocumentFragment(templateConfig)) {
+        // Document fragment - use its child nodes
+        callback(makeArray(templateConfig.childNodes));
+    } else if (templateConfig['element']) {
+        var element = templateConfig['element'];
+        if (isDomElement(element)) {
+            // Element instance - copy its child nodes
+            callback(cloneNodesFromTemplateSourceElement(element));
+        } else if (typeof element === 'string') {
+            // Element ID - find it, then copy its child nodes
+            var elemInstance = document.getElementById(element);
+            if (elemInstance) {
+                callback(cloneNodesFromTemplateSourceElement(elemInstance));
+            } else {
+                errorCallback('Cannot find element with ID ' + element);
+            }
+        } else {
+            errorCallback('Unknown element type: ' + element);
+        }
+    } else {
+        errorCallback('Unknown template value: ' + templateConfig);
+    }
+}
+
+function resolveViewModel(errorCallback, viewModelConfig, callback) {
+    if (typeof viewModelConfig === 'function') {
+        // Constructor - convert to standard factory function format
+        // By design, this does *not* supply componentInfo to the constructor, as the intent is that
+        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only
+        // be used in factory functions, not viewmodel constructors.
+        callback(function (params /*, componentInfo */) {
+            return new viewModelConfig(params);
+        });
+    } else if (typeof viewModelConfig[createViewModelKey] === 'function') {
+        // Already a factory function - use it as-is
+        callback(viewModelConfig[createViewModelKey]);
+    } else if ('instance' in viewModelConfig) {
+        // Fixed object instance - promote to createViewModel format for API consistency
+        var fixedInstance = viewModelConfig['instance'];
+        callback(function (/* params, componentInfo */) {
+            return fixedInstance;
+        });
+    } else if ('viewModel' in viewModelConfig) {
+        // Resolved AMD module whose value is of the form { viewModel: ... }
+        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);
+    } else {
+        errorCallback('Unknown viewModel value: ' + viewModelConfig);
+    }
+}
+
+function cloneNodesFromTemplateSourceElement(elemInstance) {
+    switch (tagNameLower(elemInstance)) {
+    case 'script':
+        return parseHtmlFragment(elemInstance.text);
+    case 'textarea':
+        return parseHtmlFragment(elemInstance.value);
+    case 'template':
+        // For browsers with proper <template> element support (i.e., where the .content property
+        // gives a document fragment), use that document fragment.
+        if (isDocumentFragment(elemInstance.content)) {
+            return cloneNodes(elemInstance.content.childNodes);
+        }
+    }
+
+    // Regular elements such as <div>, and <template> elements on old browsers that don't really
+    // understand <template> and just treat it as a regular container
+    return cloneNodes(elemInstance.childNodes);
+}
+
+
+function possiblyGetConfigFromAmd(errorCallback, config, callback) {
+    if (typeof config.require === 'string') {
+        // The config is the value of an AMD module
+        if (window.amdRequire || window.require) {
+            (window.amdRequire || window.require)([config.require], callback);
+        } else {
+            errorCallback('Uses require, but no AMD loader is present');
+        }
+    } else {
+        callback(config);
+    }
+}
+
+function makeErrorCallback(componentName) {
+    return function (message) {
+        throw new Error('Component \'' + componentName + '\': ' + message);
+    };
+}
+
+
+// By default, the default loader is the only registered component loader
+registry.loaders.push(defaultLoader);
+
+/**
+ * Component --- Abstract Base Class
+ *
+ * This simplifies and compartmentalizes Components.  Use this:
+ *
+ *    class CompX extends ComponentABC {
+ *    	static get element () { return 'comp-x-id' }
+ *    	static get sync () { return false }
+ *    	static get elementName () { return 'comp-x' }
+ *    }
+ *    CompX.register()
+ *
+ * instead of:
+ *
+ *   class CompX {}
+ *   
+ *   ko.components.register('comp-x', {
+ *     viewModel: CompX,
+ *     synchronous: false,
+ *     template: { element: 'comp-x' }
+ *   })
+ *
+ * As well, gain all the benefits of a LifeCycle, namely automated
+ * event and subscription addition/removal.
+ * 
+ * NOTE: A Component created this way can add events to the component node
+ * with `this.addEventListener(type, action)`.
+ */
+class ComponentABC extends LifeCycle {
+	/**
+	 * @return {string} The custom node name of this component.
+	 */
+	static get elementName () {
+		throw new Error("[ComponentABC] `elementName` must be overloaded.")	
+	}
+
+	/**
+	 * Overload this to return:
+	 * 1. A string of markup
+	 * 2. An array of DOM nodes
+	 * 3. A document fragment
+	 * 4. An AMD module (with `{require: 'some/template'}`)
+	 * @return {mixed} One of the accepted template types for the ComponentBinding.
+	 */
+	static get template () { return { element: this.element } }
+
+	/**
+	 * This is called by the default `template`.  Overload this to return:
+	 * 1. The element ID
+	 * 2. A DOM node itself
+	 * @return {string|HTMLElement} either the element ID or actual element.
+	 */
+	static get element () {
+		throw new Error("[ComponentABC] `element` must be overloaded.")
+	}
+
+	/**
+	 * @return {bool} True if the component shall load synchronously
+	 */
+	static get sync () { return true }
+
+	static register (name = this.elementName) {
+		const viewModel = this;
+		const {template} = this;
+		const synchronous = this.sync;
+		register(name, { viewModel, template, synchronous });
+	}
+}
+
+var index$1 = {
+  ComponentABC,
+  // -- Registry --
+  get: registry.get,
+  clearCachedDefinition: registry.clearCachedDefinition,
+
+  // -- Loader --
+  register,
+  isRegistered,
+  unregister,
+  defaultLoader,
+  // "Privately" expose the underlying config registry for use in old-IE shim
+  _allRegisteredComponents: defaultConfigRegistry,
+
+  get loaders () { return registry.loaders },
+  set loaders (loaders) { registry.loaders = loaders; }
+};
+
+class ComponentProvider extends Provider {
+  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE
+
+  nodeHasBindings (node) {
+    return Boolean(this.getComponentNameForNode(node))
+  }
+
+  getBindingAccessors (node, context) {
+    const componentName = this.getComponentNameForNode(node);
+    if (!componentName) { return }
+    const component = () => ({
+      name: componentName,
+      params: this.getComponentParams(node, context)
+    });
+    return { component }
+  }
+
+  getComponentNameForNode (node) {
+    if (node.nodeType !== node.ELEMENT_NODE) { return }
+    const tagName = tagNameLower(node);
+    if (index$1.isRegistered(tagName)) {
+      const hasDash = tagName.includes('-');
+      const isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';
+      if (hasDash || isUnknownEntity) { return tagName }
+    }
+  }
+
+  getComponentParams (node, context) {
+    const parser = new Parser(node, context, this.globals);
+    const paramsString = (node.getAttribute('params') || '').trim();
+    const accessors = parser.parse(paramsString, context, node);
+    if (!accessors || Object.keys(accessors).length === 0) {
+      return { $raw: {} }
+    }
+    const $raw = objectMap(accessors,
+      (value) => computed(value, null, { disposeWhenNodeIsRemoved: node })
+    );
+    const params = objectMap($raw, (v) => this.makeParamValue(node, v));
+    return Object.assign({ $raw }, params)
+  }
+
+  makeParamValue (node, paramValueComputed) {
+    const paramValue = paramValueComputed.peek();
+    // Does the evaluation of the parameter value unwrap any observables?
+    if (!paramValueComputed.isActive()) {
+      // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.
+      // Example: "someVal: firstName, age: 123" (whether or not firstName is an observable/computed)
+      return paramValue
+    }
+    // Yes it does. Supply a computed property that unwraps both the outer (binding expression)
+    // level of observability, and any inner (resulting model value) level of observability.
+    // This means the component doesn't have to worry about multiple unwrapping. If the value is a
+    // writable observable, the computed will also be writable and pass the value on to the observable.
+    const isWriteable = isWriteableObservable(paramValue);
+
+    return computed({
+      read: () => unwrap(paramValueComputed()),
+      write: isWriteable ? (v) => paramValueComputed()(v) : null,
+      disposeWhenNodeIsRemoved: node
+    })
+  }
+}
+
+/**
+ * Convert attributes with ko-* to bindings.
+ *
+ * e.g.
+ * <div ko-visible='value'></div>
+ */
+class AttrProvider extends Provider {
+  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE
+
+  get PREFIX () { return 'ko-' }
+
+  getBindingAttributesList (node) {
+    if (!node.hasAttributes()) { return [] }
+    return Array.from(node.attributes)
+      .filter(attr => attr.name.startsWith(this.PREFIX))
+  }
+
+  nodeHasBindings (node) {
+    return this.getBindingAttributesList(node).length > 0
+  }
+
+  getBindingAccessors (node, context) {
+    return Object.assign({}, ...this.handlersFromAttributes(node, context))
+  }
+
+  * handlersFromAttributes (node, context) {
+    for (const attr of this.getBindingAttributesList(node)) {
+      const name = attr.name.substr(this.PREFIX.length);
+      yield {[name]: () => this.getValue(attr.value, context, node)};
+    }
+  }
+
+  getValue (token, $context, node) {
+    /* FIXME: This duplicates Identifier.prototype.lookup_value; it should
+       be refactored into e.g. a BindingContext method */
+    if (!token) { return }
+    const $data = $context.$data;
+
+    switch (token) {
+      case '$element': return node
+      case '$context': return $context
+      case 'this': case '$data': return $context.$data
+    }
+
+    if ($data instanceof Object && token in $data) { return $data[token] }
+    if (token in $context) { return $context[token] }
+    if (token in this.globals) { return this.globals[token] }
+
+    throw new Error(`The variable '${token} not found.`)
+  }
+}
+
+class MultiProvider extends Provider {
+  get FOR_NODE_TYPES () { return this.nodeTypes }
+
+  constructor (params = {}) {
+    super(params);
+    const providers = params.providers || [];
+    this.nodeTypeMap = {};
+    this.nodeTypes = [];
+    this.providers = [];
+    providers.forEach(p => this.addProvider(p));
+  }
+
+  addProvider (provider) {
+    this.providers.push(provider);
+    provider.bindingHandlers = this.bindingHandlers;
+    provider.globals = this.globals;
+    const nodeTypeMap = this.nodeTypeMap;
+    for (const nodeType of provider.FOR_NODE_TYPES) {
+      if (!nodeTypeMap[nodeType]) { nodeTypeMap[nodeType] = []; }
+      nodeTypeMap[nodeType].push(provider);
+    }
+    this.nodeTypes = Object.keys(this.nodeTypeMap).map(k => parseInt(k, 10));
+  }
+
+  providersFor (node) {
+    return this.nodeTypeMap[node.nodeType] || []
+  }
+
+  nodeHasBindings (node) {
+    return this.providersFor(node).some(p => p.nodeHasBindings(node))
+  }
+
+  preprocessNode (node) {
+    for (const provider of this.providersFor(node)) {
+      const newNodes = provider.preprocessNode(node);
+      if (newNodes) { return newNodes }
+    }
+  }
+
+  * enumerateProviderBindings (node, ctx) {
+    for (const provider of this.providersFor(node)) {
+      const bindings = provider.getBindingAccessors(node, ctx) || {};
+      for (const [key, accessor] of Object.entries(bindings || {})) {
+        yield [key, accessor];
+      }
+    }
+  }
+
+  getBindingAccessors (node, ctx) {
+    node = this.preprocessNode(node) || node;
+    const bindings = {};
+    for (const [key, accessor] of this.enumerateProviderBindings(node, ctx)) {
+      if (key in bindings) {
+        throw new Error(`The binding "${key}" is duplicated by multiple providers`)
+      }
+      bindings[key] = accessor;
+    }
+    return bindings
+  }
+}
+
+const INNER_EXPRESSION = /^([\s\S]*)}}([\s\S]*?)\{\{([\s\S]*)$/;
+const OUTER_EXPRESSION = /^([\s\S]*?)\{\{([\s\S]*)}}([\s\S]*)$/;
+const BINDING_EXPRESSION = /^([^,"'{}()/:[\]\s]+)\s+([^\s:].*)/;
+
+class Interpolated {
+  constructor (text) {
+    this.text = text;
+  }
+
+  trim (string) {
+    return string === null ? '' : string.trim()
+  }
+}
+
+class Expression$1 extends Interpolated {
+  asAttr (context, globals, node) {
+    return new Parser().parseExpression(this.text, context, globals, node)()
+  }
+
+  * textNodeReplacement (textNode) {
+    const text = this.trim(this.text);
+    const ownerDocument = textNode ? textNode.ownerDocument : document;
+    const firstChar = text[0];
+    const lastChar = text[text.length - 1];
+    var closeComment = true;
+    var binding;
+
+    if (firstChar === '#') {
+      if (lastChar === '/') {
+        binding = text.slice(1, -1);
+      } else {
+        binding = text.slice(1);
+        closeComment = false;
+      }
+      const matches = binding.match(BINDING_EXPRESSION);
+      if (matches) {
+        binding = matches[1] + ':' + matches[2];
+      }
+    } else if (firstChar === '/') {
+      // replace only with a closing comment
+    } else if (firstChar === '{' && lastChar === '}') {
+      binding = 'html:' + this.trim(text.slice(1, -1));
+    } else {
+      binding = 'text:' + this.trim(text);
+    }
+
+    if (binding) {
+      yield ownerDocument.createComment('ko ' + binding);
+    }
+    if (closeComment) {
+      yield ownerDocument.createComment('/ko');
+    }
+  }
+}
+
+class Text extends Interpolated {
+  asAttr () { return this.text }
+
+  * textNodeReplacement () {
+    yield document.createTextNode(this.text.replace(/"/g, '\\"'));
+  }
+}
+
+/**
+ *          Interpolation Parsing
+ */
+function * innerParse (text) {
+  const innerMatch = text.match(INNER_EXPRESSION);
+  if (innerMatch) {
+    const [pre, inner, post] = innerMatch.slice(1);
+    yield * innerParse(pre);
+    yield new Text(inner);
+    yield new Expression$1(post);
+  } else {
+    yield new Expression$1(text);
+  }
+}
+
+function * parseOuterMatch (outerMatch) {
+  if (!outerMatch) { return }
+  let [pre, inner, post] = outerMatch.slice(1);
+  yield new Text(pre);
+  yield * innerParse(inner);
+  yield new Text(post);
+}
+
+function * parseInterpolation (text) {
+  for (const textOrExpr of parseOuterMatch(text.match(OUTER_EXPRESSION))) {
+    if (textOrExpr.text) { yield textOrExpr; }
+  }
+}
+
+/**
+ * These are bindings that are mapped specific attributes, such as
+ * two-way communication (value/checked) or which have anti-collision
+ * properties (css).
+ */
+const DEFAULT_ATTRIBUTE_BINDING_MAP = {
+  value: 'value',
+  checked: 'checked',
+  class: 'css'
+};
+
+/**
+ *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>
+ */
+class AttributeMustacheProvider extends Provider {
+  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE
+
+  constructor (params = {}) {
+    super(params);
+    this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);
+    this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;
+  }
+
+  * attributesToInterpolate (attributes) {
+    for (const attr of Array.from(attributes)) {
+      if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) { continue }
+      if (attr.specified && attr.value.includes('{{')) { yield attr; }
+    }
+  }
+
+  nodeHasBindings (node) {
+    return !this.attributesToInterpolate(node.attributes).next().done
+  }
+
+  partsTogether (parts, context, node, ...valueToWrite) {
+    if (parts.length > 1) {
+      return parts
+        .map(p => unwrap(p.asAttr(context, this.globals, node))).join('')
+    }
+    // It may be a writeable observable e.g. value="{{ value }}".
+    const part = parts[0].asAttr(context, this.globals);
+    if (valueToWrite.length) { part(valueToWrite[0]); }
+    return part
+  }
+
+  attributeBinding (name, parts) {
+    return [name, parts]
+  }
+
+  * bindingParts (node, context) {
+    for (const attr of this.attributesToInterpolate(node.attributes)) {
+      const parts = Array.from(parseInterpolation(attr.value));
+      if (parts.length) { yield this.attributeBinding(attr.name, parts); }
+    }
+  }
+
+  getPossibleDirectBinding (attrName) {
+    const bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];
+    return bindingName && this.bindingHandlers.get(attrName)
+  }
+
+  * bindingObjects (node, context) {
+    for (const [attrName, parts] of this.bindingParts(node, context)) {
+      const bindingForAttribute = this.getPossibleDirectBinding(attrName);
+      const handler = bindingForAttribute ? attrName : `attr.${attrName}`;
+      const accessorFn = bindingForAttribute
+        ? (...v) => this.partsTogether(parts, context, node, ...v)
+        : (...v) => ({[attrName]: this.partsTogether(parts, context, node, ...v)});
+      node.removeAttribute(attrName);
+      yield { [handler]: accessorFn };
+    }
+  }
+
+  getBindingAccessors (node, context) {
+    return Object.assign({}, ...this.bindingObjects(node, context))
+  }
+}
+
+/**
+ * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.
+ *
+ * This binding must come before the VirtualProvider.
+ */
+class TextMustacheProvider extends Provider {
+  get FOR_NODE_TYPES () { return [ 3 ] } // document.TEXT_NODE
+
+  * textToNodes (textNode) {
+    const parent = textNode.parentNode;
+    const isTextarea = parent && parent.nodeName === 'TEXTAREA';
+    const hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');
+
+    if (!hasStash || isTextarea) { return }
+
+    for (const part of parseInterpolation(textNode.nodeValue)) {
+      yield * part.textNodeReplacement(textNode);
+    }
+  }
+
+  textInterpolation (textNode) {
+    const newNodes = Array.from(this.textToNodes(textNode));
+
+    if (newNodes.length === 0) { return }
+
+    if (textNode.parentNode) {
+      const parent = textNode.parentNode;
+      const n = newNodes.length;
+      for (let i = 0; i < n; ++i) {
+        parent.insertBefore(newNodes[i], textNode);
+      }
+      parent.removeChild(textNode);
+    }
+
+    return newNodes
+  }
+
+  /**
+   * We convert as follows:
+   *
+   *   {{# ... }} into <!-- ko ... -->
+   *   {{/ ... }} into <!-- /ko -->
+   *   {{# ... /}} into <!-- ko ... --><!-- /ko -->
+   *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->
+   *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->
+   *
+   * VirtualProvider can then pick up and do the actual binding.
+   */
+  preprocessNode (node) {
+    return this.textInterpolation(node)
+  }
+}
+
+var storedBindingContextDomDataKey = data.nextKey();
+
+
+
+// The bindingContext constructor is only called directly to create the root context. For child
+// contexts, use bindingContext.createChildContext or bindingContext.extend.
+function bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {
+
+    var self = this,
+        isFunc = typeof(dataItemOrAccessor) == "function" && !isObservable(dataItemOrAccessor),
+        nodes,
+        subscribable$$1;
+
+    // The binding context object includes static properties for the current, parent, and root view models.
+    // If a view model is actually stored in an observable, the corresponding binding context object, and
+    // any child contexts, must be updated when the view model is changed.
+    function updateContext() {
+        // Most of the time, the context will directly get a view model object, but if a function is given,
+        // we call the function to retrieve the view model. If the function accesses any observables or returns
+        // an observable, the dependency is tracked, and those observables can later cause the binding
+        // context to be updated.
+        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor,
+            dataItem = unwrap(dataItemOrObservable);
+
+        if (parentContext) {
+            // When a "parent" context is given, register a dependency on the parent context. Thus whenever the
+            // parent context is updated, this context will also be updated.
+            if (parentContext._subscribable)
+                parentContext._subscribable();
+
+            // Copy $root and any custom properties from the parent context
+            extend(self, parentContext);
+
+            // Because the above copy overwrites our own properties, we need to reset them.
+            self._subscribable = subscribable$$1;
+        } else {
+            self.$parents = [];
+            self.$root = dataItem;
+
+            // Export 'ko' in the binding context so it will be available in bindings and templates
+            // even if 'ko' isn't exported as a global, such as when using an AMD loader.
+            // See https://github.com/SteveSanderson/knockout/issues/490
+            self.ko = options.knockoutInstance;
+        }
+        self.$rawData = dataItemOrObservable;
+        self.$data = dataItem;
+        if (dataItemAlias)
+            self[dataItemAlias] = dataItem;
+
+        // The extendCallback function is provided when creating a child context or extending a context.
+        // It handles the specific actions needed to finish setting up the binding context. Actions in this
+        // function could also add dependencies to this binding context.
+        if (extendCallback)
+            extendCallback(self, parentContext, dataItem);
+
+        return self.$data;
+    }
+
+    function disposeWhen() {
+        return nodes && !anyDomNodeIsAttachedToDocument(nodes);
+    }
+
+    if (settings && settings.exportDependencies) {
+        // The "exportDependencies" option means that the calling code will track any dependencies and re-create
+        // the binding context when they change.
+        updateContext();
+        return;
+    }
+
+    subscribable$$1 = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });
+
+    // At this point, the binding context has been initialized, and the "subscribable" computed observable is
+    // subscribed to any observables that were accessed in the process. If there is nothing to track, the
+    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in
+    // the context object.
+    if (subscribable$$1.isActive()) {
+        self._subscribable = subscribable$$1;
+
+        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed
+        subscribable$$1.equalityComparer = null;
+
+        // We need to be able to dispose of this computed observable when it's no longer needed. This would be
+        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and
+        // we cannot assume that those nodes have any relation to each other. So instead we track any node that
+        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.
+
+        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates
+        nodes = [];
+        subscribable$$1._addNode = function(node) {
+            nodes.push(node);
+            addDisposeCallback(node, function(node) {
+                arrayRemoveItem(nodes, node);
+                if (!nodes.length) {
+                    subscribable$$1.dispose();
+                    self._subscribable = subscribable$$1 = undefined;
+                }
+            });
+        };
+    }
+}
+
+bindingContext.prototype.lookup = function (token, globals, node) {
+  // short circuits
+  switch (token) {
+    case '$element': return node
+    case '$context': return this
+    case 'this': case '$data': return this.$data
+  }
+  const $data = this.$data;
+  // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.
+  if ($data instanceof Object && token in $data) { return $data[token] }
+  if (token in this) { return this[token] }
+  if (token in globals) { return globals[token] }
+
+  throw new Error(`The variable "${token}" was not found on $data, $context, or globals.`)
+};
+
+// Extend the binding context hierarchy with a new view model object. If the parent context is watching
+// any observables, the new child context will automatically get a dependency on the parent context.
+// But this does not mean that the $data value of the child context will also get updated. If the child
+// view model also depends on the parent view model, you must provide a function that returns the correct
+// view model on each update.
+bindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {
+    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function(self, parentContext) {
+        // Extend the context hierarchy by setting the appropriate pointers
+        self.$parentContext = parentContext;
+        self.$parent = parentContext.$data;
+        self.$parents = (parentContext.$parents || []).slice(0);
+        self.$parents.unshift(self.$parent);
+        if (extendCallback)
+            extendCallback(self);
+    }, settings);
+};
+
+// Extend the binding context with new custom properties. This doesn't change the context hierarchy.
+// Similarly to "child" contexts, provide a function here to make sure that the correct values are set
+// when an observable view model is updated.
+bindingContext.prototype.extend = function(properties) {
+    // If the parent context references an observable view model, "_subscribable" will always be the
+    // latest view model object. If not, "_subscribable" isn't set, and we can use the static "$data" value.
+    return new bindingContext(this._subscribable || this.$data, this, null, function(self, parentContext) {
+        // This "child" context doesn't directly track a parent observable view model,
+        // so we need to manually set the $rawData value to match the parent.
+        self.$rawData = parentContext.$rawData;
+        extend(self, typeof(properties) === "function" ? properties() : properties);
+    });
+};
+
+bindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {
+    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { "exportDependencies": true });
+};
+
+
+function storedBindingContextForNode(node, bindingContext) {
+    if (arguments.length == 2) {
+        data.set(node, storedBindingContextDomDataKey, bindingContext);
+        if (bindingContext._subscribable)
+            bindingContext._subscribable._addNode(node);
+    } else {
+        return data.get(node, storedBindingContextDomDataKey);
+    }
+}
+
+
+// Retrieving binding context from arbitrary nodes
+function contextFor(node) {
+    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
+    switch (node.nodeType) {
+    case 1:
+    case 8:
+        var context = storedBindingContextForNode(node);
+        if (context) return context;
+        if (node.parentNode) return contextFor(node.parentNode);
+        break;
+    }
+    return undefined;
+}
+
+
+function dataFor(node) {
+    var context = contextFor(node);
+    return context ? context.$data : undefined;
+}
+
+class BindingHandler extends LifeCycle {
+  constructor (params) {
+    super();
+    const {$element, valueAccessor, allBindings, $context} = params;
+    Object.assign(this, {
+      valueAccessor,
+      allBindings,
+      $element,
+      $context,
+      $data: $context.$data
+    });
+
+    this.anchorTo($element);
+  }
+
+  get value () { return this.valueAccessor() }
+  set value (v) { return this.valueAccessor(v) }
+
+  get controlsDescendants () { return false }
+
+  static get allowVirtualElements () { return false }
+  static get isBindingHandlerClass () { return true }
+
+  /* Overload this for asynchronous bindings or bindings that recursively
+     apply bindings (e.g. components, foreach, template).
+
+     A binding should be complete when it has run through once, notably
+     in server-side bindings for pre-rendering.
+  */
+  get bindingCompleted () { return true }
+
+  static registerAs (name, provider = options.bindingProviderInstance) {
+    provider.bindingHandlers.set(name, this);
+  }
+}
+
+/**
+ * An AsyncBindingHandler shall call `completeBinding` when the binding
+ * is to be considered complete.
+ */
+class AsyncBindingHandler extends BindingHandler {
+  constructor (params) {
+    super(params);
+    this.bindingCompletion = new options.Promise((resolve) => { this.completeBinding = resolve; });
+  }
+
+  get bindingCompleted () { return this.bindingCompletion }
+}
+
+/**
+ * We have no guarantees, for users employing legacy bindings,
+ * that it has not been changed with a modification like
+ *
+ *    ko.bindingHandlers[name] = { init: ...}
+ *
+ * ... so we have to keep track by way of a map.
+ */
+const PossibleWeakMap = options.global.WeakMap || Map;
+const legacyBindingMap = new PossibleWeakMap();
+
+class LegacyBindingHandler extends BindingHandler {
+  constructor (params) {
+    super(params);
+    const handler = this.handler;
+
+    if (typeof handler.dispose === 'function') {
+      this.addDisposable(handler);
+    }
+
+    try {
+      this.initReturn = handler.init && handler.init(...this.legacyArgs);
+    } catch (e) { params.onError('init', e); }
+
+    if (typeof handler.update === 'function') {
+      this.computed(() => {
+        try {
+          handler.update(...this.legacyArgs);
+        } catch (e) {
+          params.onError('update', e);
+        }
+      });
+    }
+  }
+
+  get legacyArgs () {
+    return [
+      this.$element, this.valueAccessor, this.allBindings,
+      this.$data, this.$context
+    ]
+  }
+
+  get controlsDescendants () {
+    const objectToTest = this.initReturn || this.handler || {};
+    return objectToTest.controlsDescendantBindings
+  }
+
+  /**
+   * Create a handler instance from the `origin`, which may be:
+   *
+   * 1. an object (becomes LegacyBindingHandler)
+   * 2. a function (becomes LegacyBindingHandler with `init: function`)
+   *
+   * If given an object (the only kind supported in knockout 3.x and before), it
+   * shall draw the `init`, `update`, and `allowVirtualElements` properties
+   */
+  static getOrCreateFor (key, handler) {
+    if (legacyBindingMap.has(handler)) {
+      return legacyBindingMap.get(handler)
+    }
+    const newLegacyHandler = this.createFor(key, handler);
+    legacyBindingMap.set(handler, newLegacyHandler);
+    return newLegacyHandler
+  }
+
+  static createFor (key, handler) {
+    if (typeof handler === 'function') {
+      const [initFn, disposeFn] = [handler, handler.dispose];
+      return class extends LegacyBindingHandler {
+        get handler () {
+          const init = initFn.bind(this);
+          const dispose = disposeFn ? disposeFn.bind(this) : null;
+          return { init, dispose }
+        }
+        static get after () { return handler.after }
+        static get allowVirtualElements () {
+          return handler.allowVirtualElements || virtualElements.allowedBindings[key]
+        }
+      }
+    }
+
+    if (typeof handler === 'object') {
+      return class extends LegacyBindingHandler {
+        get handler () { return handler }
+        static get after () { return handler.after }
+        static get allowVirtualElements () {
+          return handler.allowVirtualElements || virtualElements.allowedBindings[key]
+        }
+      }
+    }
+
+    throw new Error('The given handler is not an appropriate type.')
+  }
+}
+
+/* eslint no-cond-assign: 0 */
+
+// The following element types will not be recursed into during binding.
+var bindingDoesNotRecurseIntoElementTypes = {
+    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,
+    // because it's unexpected and a potential XSS issue.
+    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer
+    // and because such elements' contents are always intended to be bound in a different context
+    // from where they appear in the document.
+  'script': true,
+  'textarea': true,
+  'template': true
+};
+
+// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers
+function getBindingHandler (bindingKey) {
+  const handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);
+  if (!handler) { return }
+  if (handler.isBindingHandlerClass) { return handler }
+  return LegacyBindingHandler.getOrCreateFor(bindingKey, handler)
+}
+
+// Returns the valueAccesor function for a binding value
+function makeValueAccessor (value) {
+  return function () {
+    return value
+  }
+}
+
+// Returns the value of a valueAccessor function
+function evaluateValueAccessor (valueAccessor) {
+  return valueAccessor()
+}
+
+// Given a function that returns bindings, create and return a new object that contains
+// binding value-accessors functions. Each accessor function calls the original function
+// so that it always gets the latest value and all dependencies are captured. This is used
+// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.
+function makeAccessorsFromFunction (callback) {
+  return objectMap(dependencyDetection.ignore(callback), function (value, key) {
+    return function () {
+      return callback()[key]
+    }
+  })
+}
+
+// Given a bindings function or object, create and return a new object that contains
+// binding value-accessors functions. This is used by ko.applyBindingsToNode.
+function makeBindingAccessors (bindings, context, node) {
+  if (typeof bindings === 'function') {
+    return makeAccessorsFromFunction(bindings.bind(null, context, node))
+  } else {
+    return objectMap(bindings, makeValueAccessor)
+  }
+}
+
+// This function is used if the binding provider doesn't include a getBindingAccessors function.
+// It must be called with 'this' set to the provider instance.
+function getBindingsAndMakeAccessors (node, context) {
+  return makeAccessorsFromFunction(this.getBindings.bind(this, node, context))
+}
+
+function applyBindingsToDescendantsInternal (bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {
+  var currentChild;
+  var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);
+  const provider = options.bindingProviderInstance;
+  const preprocessNode = provider.preprocessNode;
+
+    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's
+    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to
+    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that
+    // trigger insertion of <template> contents at that point in the document.
+  if (preprocessNode) {
+    while (currentChild = nextInQueue) {
+      nextInQueue = virtualElements.nextSibling(currentChild);
+      preprocessNode.call(provider, currentChild);
+    }
+        // Reset nextInQueue for the next loop
+    nextInQueue = virtualElements.firstChild(elementOrVirtualElement);
+  }
+
+  while (currentChild = nextInQueue) {
+        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
+    nextInQueue = virtualElements.nextSibling(currentChild);
+    applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);
+  }
+}
+
+function hasBindings (node) {
+  const provider = options.bindingProviderInstance;
+  return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node)
+}
+
+function applyBindingsToNodeAndDescendantsInternal (bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {
+  // Perf optimisation: Apply bindings only if...
+  // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
+  //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
+  // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
+  var isElement = nodeVerified.nodeType === 1;
+  if (isElement) { // Workaround IE <= 8 HTML parsing weirdness
+    virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
+  }
+
+  var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)
+                             hasBindings(nodeVerified); // Case (2)
+
+  const {shouldBindDescendants} = shouldApplyBindings
+    ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)
+    : { shouldBindDescendants: true };
+
+  if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {
+    // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
+    //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
+    //    hence bindingContextsMayDifferFromDomParentElement is false
+    //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
+    //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
+    //    hence bindingContextsMayDifferFromDomParentElement is true
+    applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);
+  }
+}
+
+var boundElementDomDataKey = data.nextKey();
+
+function * topologicalSortBindings (bindings) {
+  const results = [];
+  // Depth-first sort
+  const bindingsConsidered = {};    // A temporary record of which bindings are already in 'result'
+  const cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it
+
+  objectForEach(bindings, function pushBinding (bindingKey) {
+    if (!bindingsConsidered[bindingKey]) {
+      const binding = getBindingHandler(bindingKey);
+      if (!binding) { return }
+        // First add dependencies (if any) of the current binding
+      if (binding.after) {
+        cyclicDependencyStack.push(bindingKey);
+        arrayForEach(binding.after, function (bindingDependencyKey) {
+          if (!bindings[bindingDependencyKey]) { return }
+          if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {
+            throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '))
+          } else {
+            pushBinding(bindingDependencyKey);
+          }
+        });
+        cyclicDependencyStack.length--;
+      }
+        // Next add the current binding
+      results.push([ bindingKey, binding ]);
+    }
+    bindingsConsidered[bindingKey] = true;
+  });
+
+  for (const result of results) { yield result; }
+}
+
+function applyBindingsToNodeInternal (node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {
+    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified
+  var alreadyBound = data.get(node, boundElementDomDataKey);
+  if (!sourceBindings) {
+    if (alreadyBound) {
+      onBindingError({
+        during: 'apply',
+        errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),
+        element: node,
+        bindingContext: bindingContext$$1
+      });
+      return false
+    }
+    data.set(node, boundElementDomDataKey, true);
+  }
+
+    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
+    // we can easily recover it just by scanning up the node's ancestors in the DOM
+    // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
+  if (!alreadyBound && bindingContextMayDifferFromDomParentElement) { storedBindingContextForNode(node, bindingContext$$1); }
+
+    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings
+  var bindings;
+  if (sourceBindings && typeof sourceBindings !== 'function') {
+    bindings = sourceBindings;
+  } else {
+    const provider = options.bindingProviderInstance;
+    const getBindings = provider.getBindingAccessors || getBindingsAndMakeAccessors;
+
+    if (provider.FOR_NODE_TYPES.includes(node.nodeType)) {
+          // Get the binding from the provider within a computed observable so that we can update the bindings whenever
+          // the binding context is updated or if the binding provider accesses observables.
+      var bindingsUpdater = computed(
+              function () {
+                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings.call(provider, node, bindingContext$$1);
+                  // Register a dependency on the binding context to support observable view models.
+                if (bindings && bindingContext$$1._subscribable) { bindingContext$$1._subscribable(); }
+                return bindings
+              },
+              null, { disposeWhenNodeIsRemoved: node }
+          );
+
+      if (!bindings || !bindingsUpdater.isActive()) { bindingsUpdater = null; }
+    }
+  }
+
+  var bindingHandlerThatControlsDescendantBindings;
+  if (bindings) {
+    const allBindingHandlers = {};
+    data.set(node, 'bindingHandlers', allBindingHandlers);
+
+        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding
+        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets
+        // the latest binding value and registers a dependency on the binding updater.
+    const getValueAccessor = bindingsUpdater
+            ? (bindingKey) => function (optionalValue) {
+              var valueAccessor = bindingsUpdater()[bindingKey];
+              if (arguments.length === 0) {
+                return evaluateValueAccessor(valueAccessor)
+              } else {
+                return valueAccessor(optionalValue)
+              }
+            } : (bindingKey) => bindings[bindingKey];
+
+        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated
+    function allBindings () {
+      return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor)
+    }
+        // The following is the 3.x allBindings API
+    allBindings.has = (key) => key in bindings;
+    allBindings.get = (key) => bindings[key] && evaluateValueAccessor(getValueAccessor(key));
+
+    for (const [key, BindingHandlerClass] of topologicalSortBindings(bindings)) {
+        // Go through the sorted bindings, calling init and update for each
+      function reportBindingError (during, errorCaptured) {
+        onBindingError({
+          during,
+          errorCaptured,
+          bindings,
+          allBindings,
+          bindingKey: key,
+          bindingContext: bindingContext$$1,
+          element: node,
+          valueAccessor: getValueAccessor(key)
+        });
+      }
+
+      if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {
+        throw new Error(`The binding [${key}] cannot be used with virtual elements`)
+      }
+
+      try {
+        const bindingHandler = dependencyDetection.ignore(() =>
+          new BindingHandlerClass({
+            allBindings,
+            $element: node,
+            $context: bindingContext$$1,
+            onError: reportBindingError,
+            valueAccessor (...v) { return getValueAccessor(key)(...v) }
+          })
+        );
+
+              // Expose the bindings via domData.
+        allBindingHandlers[key] = bindingHandler;
+
+        if (bindingHandler.controlsDescendants) {
+          if (bindingHandlerThatControlsDescendantBindings !== undefined) { throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.') }
+          bindingHandlerThatControlsDescendantBindings = key;
+        }
+
+        if (bindingHandler.bindingCompleted instanceof options.Promise) {
+          asyncBindingsApplied.add(bindingHandler.bindingCompleted);
+        }
+      } catch (err) {
+        reportBindingError('creation', err);
+      }
+    }
+  }
+
+  return {
+    shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined
+  }
+}
+
+function getBindingContext (viewModelOrBindingContext) {
+  return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)
+    ? viewModelOrBindingContext
+    : new bindingContext(viewModelOrBindingContext)
+}
+
+function applyBindingAccessorsToNode (node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {
+  if (node.nodeType === 1) { // If it's an element, workaround IE <= 8 HTML parsing weirdness
+    virtualElements.normaliseVirtualElementDomStructure(node);
+  }
+  return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied)
+}
+
+function applyBindingsToNode (node, bindings, viewModelOrBindingContext) {
+  const asyncBindingsApplied = new Set();
+  var context = getBindingContext(viewModelOrBindingContext);
+  applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);
+  return options.Promise.all(asyncBindingsApplied)
+}
+
+function applyBindingsToDescendants (viewModelOrBindingContext, rootNode) {
+  const asyncBindingsApplied = new Set();
+  if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {
+    applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);
+  }
+  return options.Promise.all(asyncBindingsApplied)
+}
+
+function applyBindings (viewModelOrBindingContext, rootNode) {
+  const asyncBindingsApplied = new Set();
+  // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.
+  if (!options.jQuery === undefined && options.jQuery) {
+    options.jQuery = options.jQuery;
+  }
+
+  if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) { throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node') }
+  rootNode = rootNode || options.document.body; // Make "rootNode" parameter optional
+
+  applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);
+  return options.Promise.all(asyncBindingsApplied)
+}
+
+function onBindingError (spec) {
+  var error;
+  if (spec.bindingKey) {
+        // During: 'init' or initial 'update'
+    error = spec.errorCaptured;
+    spec.message = 'Unable to process binding "' + spec.bindingKey +
+            '" in binding "' + spec.bindingKey +
+            '"\nMessage: ' + (error.message ? error.message : error);
+  } else {
+        // During: 'apply'
+    error = spec.errorCaptured;
+  }
+  try {
+    extend(error, spec);
+  } catch (e) {
+        // Read-only error e.g. a DOMEXception.
+    spec.stack = error.stack;
+    error = new Error(error.message ? error.message : error);
+    extend(error, spec);
+  }
+  options.onError(error);
+}
+
+/* eslint no-cond-assign: 0 */
+// Objective:
+// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
+//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
+// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
+//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
+//   previously mapped - retain those nodes, and just insert/delete other ones
+
+// "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
+// You can use this, for example, to activate bindings on those nodes.
+
+function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
+    // Map this array value inside a dependentObservable so we re-map when any dependency changes
+    var mappedNodes = [];
+    var dependentObservable = computed(function() {
+        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];
+
+        // On subsequent evaluations, just replace the previously-inserted DOM nodes
+        if (mappedNodes.length > 0) {
+            replaceDomNodes(mappedNodes, newMappedNodes);
+            if (callbackAfterAddingNodes)
+                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
+        }
+
+        // Replace the contents of the mappedNodes array, thereby updating the record
+        // of which nodes would be deleted if valueToMap was itself later removed
+        mappedNodes.length = 0;
+        arrayPushAll(mappedNodes, newMappedNodes);
+    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });
+    return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };
+}
+
+var lastMappingResultDomDataKey = data.nextKey();
+var deletedItemDummyValue = data.nextKey();
+
+function setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {
+    // Compare the provided array against the previous one
+    array = array || [];
+    options$$1 = options$$1 || {};
+    var isFirstExecution = data.get(domNode, lastMappingResultDomDataKey) === undefined;
+    var lastMappingResult = data.get(domNode, lastMappingResultDomDataKey) || [];
+    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
+    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);
+
+    // Build the new mapping result
+    var newMappingResult = [];
+    var lastMappingResultIndex = 0;
+    var newMappingResultIndex = 0;
+
+    var nodesToDelete = [];
+    var itemsToProcess = [];
+    var itemsForBeforeRemoveCallbacks = [];
+    var itemsForMoveCallbacks = [];
+    var itemsForAfterAddCallbacks = [];
+    var mapData;
+
+    function itemMovedOrRetained(editScriptIndex, oldPosition) {
+        mapData = lastMappingResult[oldPosition];
+        if (newMappingResultIndex !== oldPosition)
+            itemsForMoveCallbacks[editScriptIndex] = mapData;
+        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray
+        mapData.indexObservable(newMappingResultIndex++);
+        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);
+        newMappingResult.push(mapData);
+        itemsToProcess.push(mapData);
+    }
+
+    function callCallback(callback, items) {
+        if (callback) {
+            for (var i = 0, n = items.length; i < n; i++) {
+                if (items[i]) {
+                    arrayForEach(items[i].mappedNodes, function(node) {
+                        callback(node, i, items[i].arrayEntry);
+                    });
+                }
+            }
+        }
+    }
+
+    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
+        movedIndex = editScriptItem['moved'];
+        switch (editScriptItem['status']) {
+        case "deleted":
+            if (movedIndex === undefined) {
+                mapData = lastMappingResult[lastMappingResultIndex];
+
+                // Stop tracking changes to the mapping for these nodes
+                if (mapData.dependentObservable) {
+                    mapData.dependentObservable.dispose();
+                    mapData.dependentObservable = undefined;
+                }
+
+                // Queue these nodes for later removal
+                if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {
+                    if (options$$1['beforeRemove']) {
+                        newMappingResult.push(mapData);
+                        itemsToProcess.push(mapData);
+                        if (mapData.arrayEntry === deletedItemDummyValue) {
+                            mapData = null;
+                        } else {
+                            itemsForBeforeRemoveCallbacks[i] = mapData;
+                        }
+                    }
+                    if (mapData) {
+                        nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);
+                    }
+                }
+            }
+            lastMappingResultIndex++;
+            break;
+
+        case "retained":
+            itemMovedOrRetained(i, lastMappingResultIndex++);
+            break;
+
+        case "added":
+            if (movedIndex !== undefined) {
+                itemMovedOrRetained(i, movedIndex);
+            } else {
+                mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };
+                newMappingResult.push(mapData);
+                itemsToProcess.push(mapData);
+                if (!isFirstExecution)
+                    itemsForAfterAddCallbacks[i] = mapData;
+            }
+            break;
+        }
+    }
+
+    // Store a copy of the array items we just considered so we can difference it next time
+    data.set(domNode, lastMappingResultDomDataKey, newMappingResult);
+
+    // Call beforeMove first before any changes have been made to the DOM
+    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);
+
+    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
+    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);
+
+    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
+    i = 0;
+    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
+        // Get nodes for newly added items
+        if (!mapData.mappedNodes)
+            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
+
+        // Put nodes in the right place if they aren't there already
+        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
+            if (node !== nextNode)
+                virtualElements.insertAfter(domNode, node, lastNode);
+        }
+
+        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
+        if (!mapData.initialized && callbackAfterAddingNodes) {
+            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
+            mapData.initialized = true;
+        }
+    }
+
+    // If there's a beforeRemove callback, call it after reordering.
+    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
+    // some sort of animation, which is why we first reorder the nodes that will be removed. If the
+    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
+    // Perhaps we'll make that change in the future if this scenario becomes more common.
+    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);
+
+    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item
+    // as already "removed" so we won't call beforeRemove for it again, and it ensures that the item won't match up
+    // with an actual item in the array and appear as "retained" or "moved".
+    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {
+        if (itemsForBeforeRemoveCallbacks[i]) {
+            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;
+        }
+    }
+
+    // Finally call afterMove and afterAdd callbacks
+    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);
+    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);
+}
+
+var attr = {
+    update: function(element, valueAccessor, allBindings) {
+        var value = unwrap(valueAccessor()) || {};
+        objectForEach(value, function(attrName, attrValue) {
+            attrValue = unwrap(attrValue);
+
+            // Find the namespace of this attribute, if any.
+            // Defaulting to `null` should be ok, as
+            //
+            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )
+            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )
+            //
+            var prefixLen = attrName.indexOf(':');
+            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI( attrName.substr(0, prefixLen) );
+
+            // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
+            // when someProp is a "no value"-like value (strictly null, false, or undefined)
+            // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
+            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
+
+            if (toRemove) {
+                element.removeAttributeNS(namespace, attrName);
+            } else {
+                element.setAttributeNS(namespace, attrName, attrValue.toString());
+            }
+
+            // Treat "name" specially - although you can think of it as an attribute, it also needs
+            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
+            // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
+            // entirely, and there's no strong reason to allow for such casing in HTML.
+            if (attrName === "name") {
+                setElementName(element, toRemove ? "" : attrValue.toString());
+            }
+        });
+    }
+};
+
+var checked = {
+    after: ['value', 'attr'],
+    init: function (element, valueAccessor, allBindings) {
+        var checkedValue = pureComputed(function() {
+            // Treat "value" like "checkedValue" when it is included with "checked" binding
+            if (allBindings['has']('checkedValue')) {
+                return unwrap(allBindings.get('checkedValue'));
+            } else if (allBindings['has']('value')) {
+                return unwrap(allBindings.get('value'));
+            }
+
+            return element.value;
+        });
+
+        function updateModel() {
+            // This updates the model value from the view value.
+            // It runs in response to DOM events (click) and changes in checkedValue.
+            var isChecked = element.checked,
+                elemValue = useCheckedValue ? checkedValue() : isChecked;
+
+            // When we're first setting up this computed, don't change any model state.
+            if (dependencyDetection.isInitial()) {
+                return;
+            }
+
+            // We can ignore unchecked radio buttons, because some other radio
+            // button will be getting checked, and that one can take care of updating state.
+            if (isRadio && !isChecked) {
+                return;
+            }
+
+            var modelValue = dependencyDetection.ignore(valueAccessor);
+            if (valueIsArray) {
+                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;
+                if (oldElemValue !== elemValue) {
+                    // When we're responding to the checkedValue changing, and the element is
+                    // currently checked, replace the old elem value with the new elem value
+                    // in the model array.
+                    if (isChecked) {
+                        addOrRemoveItem(writableValue, elemValue, true);
+                        addOrRemoveItem(writableValue, oldElemValue, false);
+                    }
+
+                    oldElemValue = elemValue;
+                } else {
+                    // When we're responding to the user having checked/unchecked a checkbox,
+                    // add/remove the element value to the model array.
+                    addOrRemoveItem(writableValue, elemValue, isChecked);
+                }
+                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {
+                    modelValue(writableValue);
+                }
+            } else {
+                valueAccessor(elemValue, {onlyIfChanged: true});
+            }
+        }
+
+        function updateView() {
+            // This updates the view value from the model value.
+            // It runs in response to changes in the bound (checked) value.
+            var modelValue = unwrap(valueAccessor());
+
+            if (valueIsArray) {
+                // When a checkbox is bound to an array, being checked represents its value being present in that array
+                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;
+            } else if (isCheckbox) {
+                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish
+                element.checked = modelValue;
+            } else {
+                // For radio buttons, being checked means that the radio button's value corresponds to the model value
+                element.checked = (checkedValue() === modelValue);
+            }
+        }
+
+        var isCheckbox = element.type == "checkbox",
+            isRadio = element.type == "radio";
+
+        // Only bind to check boxes and radio buttons
+        if (!isCheckbox && !isRadio) {
+            return;
+        }
+
+        var rawValue = valueAccessor(),
+            valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array),
+            rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice),
+            oldElemValue = valueIsArray ? checkedValue() : undefined,
+            useCheckedValue = isRadio || valueIsArray;
+
+        // Set up two computeds to update the binding:
+
+        // The first responds to changes in the checkedValue value and to element clicks
+        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });
+        registerEventHandler(element, "click", updateModel);
+
+        // The second responds to changes in the model value (the one associated with the checked binding)
+        computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+
+        rawValue = undefined;
+    }
+};
+
+var checkedValue = {
+    update: function (element, valueAccessor) {
+        element.value = unwrap(valueAccessor());
+    }
+};
+
+// For certain common events (currently just 'click'), allow a simplified data-binding syntax
+// e.g. click:handler instead of the usual full-length event:{click:handler}
+function makeEventHandlerShortcut(eventName) {
+    return {
+        init: function(element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+            var newValueAccessor = function () {
+                var result = {};
+                result[eventName] = valueAccessor();
+                return result;
+            };
+            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext$$1);
+        }
+    };
+}
+
+var eventHandler = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        var eventsToHandle = valueAccessor() || {};
+        objectForEach(eventsToHandle, function(eventName) {
+            if (typeof eventName == "string") {
+                registerEventHandler(element, eventName, function (event) {
+                    var handlerReturnValue;
+                    var handlerFunction = valueAccessor()[eventName];
+                    if (!handlerFunction)
+                        return;
+
+                    try {
+                        // Take all the event args, and prefix with the viewmodel
+                        var argsForHandler = makeArray(arguments);
+                        viewModel = bindingContext$$1['$data'];
+                        argsForHandler.unshift(viewModel);
+                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
+                    } finally {
+                        if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                            if (event.preventDefault)
+                                event.preventDefault();
+                            else
+                                event.returnValue = false;
+                        }
+                    }
+
+                    var bubble = allBindings.get(eventName + 'Bubble') !== false;
+                    if (!bubble) {
+                        event.cancelBubble = true;
+                        if (event.stopPropagation)
+                            event.stopPropagation();
+                    }
+                });
+            }
+        });
+    }
+};
+
+
+var onHandler = {
+    init: eventHandler.init,
+    preprocess: function (value, key, addBinding) {
+      addBinding(key.replace('on.', ''), '=>' + value);
+    }
+};
+
+// 'click' is just a shorthand for the usual full-length event:{click:handler}
+var click = makeEventHandlerShortcut('click');
+
+var css = {
+    aliases: ['class'],
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        if (value !== null && typeof value == "object") {
+            objectForEach(value, function(className, shouldHaveClass) {
+                shouldHaveClass = unwrap(shouldHaveClass);
+                toggleDomNodeCssClass(element, className, shouldHaveClass);
+            });
+        } else {
+            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value
+            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);
+            element[css.classesWrittenByBindingKey] = value;
+            toggleDomNodeCssClass(element, value, true);
+        }
+    },
+    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')
+};
+
+var enable = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        if (value && element.disabled) {
+            element.removeAttribute("disabled");
+        } else if ((!value) && (!element.disabled)) {
+            element.disabled = true;
+        }
+    }
+};
+
+var disable = {
+    update: function (element, valueAccessor) {
+        enable.update(element, function() { return !unwrap(valueAccessor()); });
+    }
+};
+
+var hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');
+var hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');
+
+var hasfocus = {
+    init: function(element, valueAccessor /*, allBindings */) {
+        var handleElementFocusChange = function(isFocused) {
+            // Where possible, ignore which event was raised and determine focus state using activeElement,
+            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
+            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
+            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
+            // from calling 'blur()' on the element when it loses focus.
+            // Discussion at https://github.com/SteveSanderson/knockout/pull/352
+            element[hasfocusUpdatingProperty] = true;
+            var ownerDoc = element.ownerDocument;
+            if ("activeElement" in ownerDoc) {
+                var active;
+                try {
+                    active = ownerDoc.activeElement;
+                } catch(e) {
+                    // IE9 throws if you access activeElement during page load (see issue #703)
+                    active = ownerDoc.body;
+                }
+                isFocused = (active === element);
+            }
+            // var modelValue = valueAccessor();
+            valueAccessor(isFocused, {onlyIfChanged: true});
+
+            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function
+            element[hasfocusLastValue] = isFocused;
+            element[hasfocusUpdatingProperty] = false;
+        };
+        var handleElementFocusIn = handleElementFocusChange.bind(null, true);
+        var handleElementFocusOut = handleElementFocusChange.bind(null, false);
+
+        registerEventHandler(element, "focus", handleElementFocusIn);
+        registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
+        registerEventHandler(element, "blur",  handleElementFocusOut);
+        registerEventHandler(element, "focusout",  handleElementFocusOut); // For IE
+    },
+    update: function(element, valueAccessor) {
+        var value = !!unwrap(valueAccessor());
+
+        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {
+            value ? element.focus() : element.blur();
+
+            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).
+            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current
+            // element was focused already.
+            if (!value && element[hasfocusLastValue]) {
+                element.ownerDocument.body.focus();
+            }
+
+            // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
+            dependencyDetection.ignore(triggerEvent, null, [element, value ? "focusin" : "focusout"]);
+        }
+    }
+};
+
+var html = {
+    init: function() {
+        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
+        return {
+            'controlsDescendantBindings': true
+        };
+    },
+    //
+    // Modify internal, per ko.punches and :
+    //      http://stackoverflow.com/a/15348139
+    update: function(element, valueAccessor) {
+        setHtml(element, valueAccessor());
+    },
+    allowVirtualElements: true
+};
+
+var $let = {
+    init: function(element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        // Make a modified binding context, with extra properties, and apply it to descendant elements
+        var innerContext = bindingContext$$1['extend'](valueAccessor);
+        applyBindingsToDescendants(innerContext, element);
+
+        return { 'controlsDescendantBindings': true };
+    },
+    allowVirtualElements: true
+};
+
+var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
+
+// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
+// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
+// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
+var selectExtensions = {
+    optionsValueDomDataKey: undefined,
+
+    readValue : function(element) {
+        switch (tagNameLower(element)) {
+        case 'option':
+            if (element[hasDomDataExpandoProperty] === true)
+                return data.get(element, selectExtensions.optionValueDomDataKey);
+            return element.value;
+        case 'select':
+            return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
+        default:
+            return element.value;
+        }
+    },
+
+    writeValue: function(element, value, allowUnset) {
+        switch (tagNameLower(element)) {
+        case 'option':
+            switch(typeof value) {
+            case "string":
+                data.set(element, selectExtensions.optionValueDomDataKey, undefined);
+                if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node
+                    delete element[hasDomDataExpandoProperty];
+                }
+                element.value = value;
+                break;
+            default:
+                // Store arbitrary object using DomData
+                data.set(element, selectExtensions.optionValueDomDataKey, value);
+                element[hasDomDataExpandoProperty] = true;
+
+                // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
+                element.value = typeof value === "number" ? value : "";
+                break;
+            }
+            break;
+        case 'select':
+            if (value === "" || value === null)       // A blank string or null value will select the caption
+                value = undefined;
+            var selection = -1;
+            for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {
+                optionValue = selectExtensions.readValue(element.options[i]);
+                // Include special check to handle selecting a caption with a blank string value
+                if (optionValue == value || (optionValue === "" && value === undefined)) {
+                    selection = i;
+                    break;
+                }
+            }
+            if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {
+                element.selectedIndex = selection;
+            }
+            break;
+        default:
+            if ((value === null) || (value === undefined))
+                value = "";
+            element.value = value;
+            break;
+        }
+    }
+};
+
+var captionPlaceholder = {};
+
+var options$1 = {
+    init: function(element) {
+        if (tagNameLower(element) !== "select")
+            throw new Error("options binding applies only to SELECT elements");
+
+        // Remove all existing <option>s.
+        while (element.length > 0) {
+            element.remove(0);
+        }
+
+        // Ensures that the binding processor doesn't try to bind the options
+        return { 'controlsDescendantBindings': true };
+    },
+    update: function (element, valueAccessor, allBindings) {
+        function selectedOptions() {
+            return arrayFilter(element.options, function (node) { return node.selected; });
+        }
+
+        var selectWasPreviouslyEmpty = element.length == 0,
+            multiple = element.multiple,
+            previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null,
+            unwrappedArray = unwrap(valueAccessor()),
+            valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'),
+            includeDestroyed = allBindings.get('optionsIncludeDestroyed'),
+            arrayToDomNodeChildrenOptions = {},
+            captionValue,
+            filteredArray,
+            previousSelectedValues = [];
+
+        if (!valueAllowUnset) {
+            if (multiple) {
+                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);
+            } else if (element.selectedIndex >= 0) {
+                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));
+            }
+        }
+
+        if (unwrappedArray) {
+            if (typeof unwrappedArray.length == "undefined") // Coerce single value into array
+                unwrappedArray = [unwrappedArray];
+
+            // Filter out any entries marked as destroyed
+            filteredArray = arrayFilter(unwrappedArray, function(item) {
+                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);
+            });
+
+            // If caption is included, add it to the array
+            if (allBindings['has']('optionsCaption')) {
+                captionValue = unwrap(allBindings.get('optionsCaption'));
+                // If caption value is null or undefined, don't show a caption
+                if (captionValue !== null && captionValue !== undefined) {
+                    filteredArray.unshift(captionPlaceholder);
+                }
+            }
+        } else {
+            // If a falsy value is provided (e.g. null), we'll simply empty the select element
+        }
+
+        function applyToObject(object, predicate, defaultValue) {
+            var predicateType = typeof predicate;
+            if (predicateType == "function")    // Given a function; run it against the data value
+                return predicate(object);
+            else if (predicateType == "string") // Given a string; treat it as a property name on the data value
+                return object[predicate];
+            else                                // Given no optionsText arg; use the data value itself
+                return defaultValue;
+        }
+
+        // The following functions can run at two different times:
+        // The first is when the whole array is being updated directly from this binding handler.
+        // The second is when an observable value for a specific array entry is updated.
+        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.
+        var itemUpdate = false;
+        function optionForArrayItem(arrayEntry, index, oldOptions) {
+            if (oldOptions.length) {
+                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [ selectExtensions.readValue(oldOptions[0]) ] : [];
+                itemUpdate = true;
+            }
+            var option = element.ownerDocument.createElement("option");
+            if (arrayEntry === captionPlaceholder) {
+                setTextContent(option, allBindings.get('optionsCaption'));
+                selectExtensions.writeValue(option, undefined);
+            } else {
+                // Apply a value to the option element
+                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);
+                selectExtensions.writeValue(option, unwrap(optionValue));
+
+                // Apply some text to the option element
+                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);
+                setTextContent(option, optionText);
+            }
+            return [option];
+        }
+
+        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection
+        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208
+        arrayToDomNodeChildrenOptions['beforeRemove'] =
+            function (option) {
+                element.removeChild(option);
+            };
+
+        function setSelectionCallback(arrayEntry, newOptions) {
+            if (itemUpdate && valueAllowUnset) {
+                // The model value is authoritative, so make sure its value is the one selected
+                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.
+                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);
+            } else if (previousSelectedValues.length) {
+                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
+                // That's why we first added them without selection. Now it's time to set the selection.
+                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;
+                setOptionNodeSelectionState(newOptions[0], isSelected);
+
+                // If this option was changed from being selected during a single-item update, notify the change
+                if (itemUpdate && !isSelected) {
+                    dependencyDetection.ignore(triggerEvent, null, [element, "change"]);
+                }
+            }
+        }
+
+        var callback = setSelectionCallback;
+        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == "function") {
+            callback = function(arrayEntry, newOptions) {
+                setSelectionCallback(arrayEntry, newOptions);
+                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);
+            };
+        }
+
+        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);
+
+        dependencyDetection.ignore(function () {
+            if (valueAllowUnset) {
+                // The model value is authoritative, so make sure its value is the one selected
+                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);
+            } else {
+                // Determine if the selection has changed as a result of updating the options list
+                var selectionChanged;
+                if (multiple) {
+                    // For a multiple-select box, compare the new selection count to the previous one
+                    // But if nothing was selected before, the selection can't have changed
+                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;
+                } else {
+                    // For a single-select box, compare the current value to the previous value
+                    // But if nothing was selected before or nothing is selected now, just look for a change in selection
+                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)
+                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])
+                        : (previousSelectedValues.length || element.selectedIndex >= 0);
+                }
+
+                // Ensure consistency between model value and selected option.
+                // If the dropdown was changed so that selection is no longer the same,
+                // notify the value or selectedOptions binding.
+                if (selectionChanged) {
+                    triggerEvent(element, "change");
+                }
+            }
+        });
+
+        // Workaround for IE bug
+        ensureSelectElementIsRenderedCorrectly(element);
+
+        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)
+            element.scrollTop = previousScrollTop;
+    }
+};
+
+selectExtensions.optionValueDomDataKey = data.nextKey();
+
+var selectedOptions = {
+    after: ['options', 'foreach'],
+
+    init: function (element, valueAccessor, allBindings) {
+        registerEventHandler(element, "change", function () {
+            var value = valueAccessor(), valueToWrite = [];
+            arrayForEach(element.getElementsByTagName("option"), function(node) {
+                if (node.selected)
+                    valueToWrite.push(selectExtensions.readValue(node));
+            });
+            valueAccessor(valueToWrite);
+        });
+    },
+
+    update: function (element, valueAccessor) {
+        if (tagNameLower(element) != "select")
+            throw new Error("values binding applies only to SELECT elements");
+
+        var newValue = unwrap(valueAccessor()),
+            previousScrollTop = element.scrollTop;
+
+        if (newValue && typeof newValue.length == "number") {
+            arrayForEach(element.getElementsByTagName("option"), function(node) {
+                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;
+                if (node.selected != isSelected) {      // This check prevents flashing of the select element in IE
+                    setOptionNodeSelectionState(node, isSelected);
+                }
+            });
+        }
+
+        element.scrollTop = previousScrollTop;
+    }
+};
+
+var style = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor() || {});
+        objectForEach(value, function(styleName, styleValue) {
+            styleValue = unwrap(styleValue);
+
+            if (styleValue === null || styleValue === undefined || styleValue === false) {
+                // Empty string removes the value, whereas null/undefined have no effect
+                styleValue = "";
+            }
+
+            element.style[styleName] = styleValue;
+        });
+    }
+};
+
+var submit = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        if (typeof valueAccessor() != "function")
+            throw new Error("The value for a submit binding must be a function");
+        registerEventHandler(element, "submit", function (event) {
+            var handlerReturnValue;
+            var value = valueAccessor();
+            try { handlerReturnValue = value.call(bindingContext$$1['$data'], element); }
+            finally {
+                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.
+                    if (event.preventDefault)
+                        event.preventDefault();
+                    else
+                        event.returnValue = false;
+                }
+            }
+        });
+    }
+};
+
+var text = {
+    init: function() {
+        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).
+        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.
+        return { controlsDescendantBindings: true };
+    },
+    update: function (element, valueAccessor) {
+        setTextContent(element, valueAccessor());
+    },
+    allowVirtualElements: true
+};
+
+var parseVersion;
+var operaVersion;
+var userAgent;
+var safariVersion;
+var firefoxVersion;
+var w$1 = options.global;
+
+if (w$1.navigator) {
+    parseVersion = function (matches) {
+        if (matches) {
+            return parseFloat(matches[1]);
+        }
+    };
+
+    // Detect various browser versions because some old versions don't fully support the 'input' event
+    operaVersion = w$1.opera && w$1.opera.version && parseInt(w$1.opera.version()),
+        userAgent = w$1.navigator.userAgent,
+        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\/([^ ]*) safari/i)),
+        firefoxVersion = parseVersion(userAgent.match(/Firefox\/([^ ]*)/));
+}
+
+// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.
+// But it does fire the 'selectionchange' event on many of those, presumably because the
+// cursor is moving and that counts as the selection changing. The 'selectionchange' event is
+// fired at the document level only and doesn't directly indicate which element changed. We
+// set up just one event handler for the document and use 'activeElement' to determine which
+// element was changed.
+if (ieVersion < 10) {
+    var selectionChangeRegisteredName = data.nextKey(),
+        selectionChangeHandlerName = data.nextKey();
+    var selectionChangeHandler = function(event) {
+        var target = this.activeElement,
+            handler = target && data.get(target, selectionChangeHandlerName);
+        if (handler) {
+            handler(event);
+        }
+    };
+    var registerForSelectionChangeEvent = function (element, handler) {
+        var ownerDoc = element.ownerDocument;
+        if (!data.get(ownerDoc, selectionChangeRegisteredName)) {
+            data.set(ownerDoc, selectionChangeRegisteredName, true);
+            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);
+        }
+        data.set(element, selectionChangeHandlerName, handler);
+    };
+}
+
+var textInput = {
+    aliases: 'textinput',
+    init: function (element, valueAccessor) {
+
+        var previousElementValue = element.value,
+            timeoutHandle,
+            elementValueBeforeEvent;
+
+        var updateModel = function (event) {
+            clearTimeout(timeoutHandle);
+            elementValueBeforeEvent = timeoutHandle = undefined;
+
+            var elementValue = element.value;
+            if (previousElementValue !== elementValue) {
+                // Provide a way for tests to know exactly which event was processed
+                if (options.debug && event) element['_ko_textInputProcessedEvent'] = event.type;
+                previousElementValue = elementValue;
+                valueAccessor(elementValue);
+            }
+        };
+
+        var deferUpdateModel = function (event) {
+            if (!timeoutHandle) {
+                // The elementValueBeforeEvent variable is set *only* during the brief gap between an
+                // event firing and the updateModel function running. This allows us to ignore model
+                // updates that are from the previous state of the element, usually due to techniques
+                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.
+                elementValueBeforeEvent = element.value;
+                var handler = options.debug ? updateModel.bind(element, {type: event.type}) : updateModel;
+                timeoutHandle = safeSetTimeout(handler, 4);
+            }
+        };
+
+        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);
+        // so we'll make sure all updates are asynchronous
+        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;
+
+        var updateView = function () {
+            var modelValue = unwrap(valueAccessor());
+
+            if (modelValue === null || modelValue === undefined) {
+                modelValue = '';
+            }
+
+            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {
+                safeSetTimeout(updateView, 4);
+                return;
+            }
+
+            // Update the element only if the element and model are different. On some browsers, updating the value
+            // will move the cursor to the end of the input, which would be bad while the user is typing.
+            if (element.value !== modelValue) {
+                previousElementValue = modelValue;  // Make sure we ignore events (propertychange) that result from updating the value
+                element.value = modelValue;
+            }
+        };
+
+        var onEvent = function (event, handler) {
+            registerEventHandler(element, event, handler);
+        };
+
+        if (options.debug && textInput._forceUpdateOn) {
+            // Provide a way for tests to specify exactly which events are bound
+            arrayForEach(textInput._forceUpdateOn, function(eventName) {
+                if (eventName.slice(0,5) == 'after') {
+                    onEvent(eventName.slice(5), deferUpdateModel);
+                } else {
+                    onEvent(eventName, updateModel);
+                }
+            });
+        } else {
+            if (ieVersion < 10) {
+                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever
+                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,
+                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it
+                // when using autocomplete, we'll use 'propertychange' for it also.
+                onEvent('propertychange', function(event) {
+                    if (event.propertyName === 'value') {
+                        ieUpdateModel(event);
+                    }
+                });
+
+                if (ieVersion == 8) {
+                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from
+                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following
+                    // events too.
+                    onEvent('keyup', updateModel);      // A single keystoke
+                    onEvent('keydown', updateModel);    // The first character when a key is held down
+                }
+                if (ieVersion >= 8) {
+                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using
+                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text
+                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'
+                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.
+                    // These are also needed in IE8 because of the bug described above.
+                    registerForSelectionChangeEvent(element, ieUpdateModel);  // 'selectionchange' covers cut, paste, drop, delete, etc.
+                    onEvent('dragend', deferUpdateModel);
+                }
+            } else {
+                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed
+                // through the user interface.
+                onEvent('input', updateModel);
+
+                if (safariVersion < 5 && tagNameLower(element) === "textarea") {
+                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'
+                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.
+                    onEvent('keydown', deferUpdateModel);
+                    onEvent('paste', deferUpdateModel);
+                    onEvent('cut', deferUpdateModel);
+                } else if (operaVersion < 11) {
+                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.
+                    // We can try to catch some of those using 'keydown'.
+                    onEvent('keydown', deferUpdateModel);
+                } else if (firefoxVersion < 4.0) {
+                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete
+                    onEvent('DOMAutoComplete', updateModel);
+
+                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.
+                    onEvent('dragdrop', updateModel);       // <3.5
+                    onEvent('drop', updateModel);           // 3.5
+                }
+            }
+        }
+
+        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.
+        onEvent('change', updateModel);
+
+        computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+    }
+};
+
+// // textinput is an alias for textInput
+// ko.bindingHandlers['textinput'] = {
+//     // preprocess is the only way to set up a full alias
+//     'preprocess': function (value, name, addBinding) {
+//         addBinding('textInput', value);
+//     }
+// };
+
+var uniqueName = {
+    init: function (element, valueAccessor) {
+        if (valueAccessor()) {
+            var name = "ko_unique_" + (++uniqueName.currentIndex);
+            setElementName(element, name);
+        }
+    },
+    currentIndex: 0
+};
+
+var value = {
+    after: ['options', 'foreach'],
+    init: function (element, valueAccessor, allBindings) {
+        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit
+        if (element.tagName.toLowerCase() == "input" && (element.type == "checkbox" || element.type == "radio")) {
+            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });
+            return;
+        }
+
+        // Always catch "change" event; possibly other events too if asked
+        var eventsToCatch = ["change"];
+        var requestedEventsToCatch = allBindings.get("valueUpdate");
+        var propertyChangedFired = false;
+        var elementValueBeforeEvent = null;
+
+        if (requestedEventsToCatch) {
+            if (typeof requestedEventsToCatch == "string") // Allow both individual event names, and arrays of event names
+                requestedEventsToCatch = [requestedEventsToCatch];
+            arrayPushAll(eventsToCatch, requestedEventsToCatch);
+            eventsToCatch = arrayGetDistinctValues(eventsToCatch);
+        }
+
+        var valueUpdateHandler = function() {
+            elementValueBeforeEvent = null;
+            propertyChangedFired = false;
+            var modelValue = valueAccessor();
+            var elementValue = selectExtensions.readValue(element);
+            valueAccessor(elementValue);
+        };
+
+        // Workaround for https://github.com/SteveSanderson/knockout/issues/122
+        // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
+        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text"
+                                       && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
+        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, "propertychange") == -1) {
+            registerEventHandler(element, "propertychange", function () { propertyChangedFired = true; });
+            registerEventHandler(element, "focus", function () { propertyChangedFired = false; });
+            registerEventHandler(element, "blur", function() {
+                if (propertyChangedFired) {
+                    valueUpdateHandler();
+                }
+            });
+        }
+
+        arrayForEach(eventsToCatch, function(eventName) {
+            // The syntax "after<eventname>" means "run the handler asynchronously after the event"
+            // This is useful, for example, to catch "keydown" events after the browser has updated the control
+            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
+            var handler = valueUpdateHandler;
+            if (stringStartsWith(eventName, "after")) {
+                handler = function() {
+                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between
+                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen
+                    // at the earliest asynchronous opportunity. We store this temporary information so that
+                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,
+                    // we can overwrite that model value change with the value the user just typed. Otherwise,
+                    // techniques like rateLimit can trigger model changes at critical moments that will
+                    // override the user's inputs, causing keystrokes to be lost.
+                    elementValueBeforeEvent = selectExtensions.readValue(element);
+                    safeSetTimeout(valueUpdateHandler, 0);
+                };
+                eventName = eventName.substring("after".length);
+            }
+            registerEventHandler(element, eventName, handler);
+        });
+
+        var updateFromModel = function () {
+            var newValue = unwrap(valueAccessor());
+            var elementValue = selectExtensions.readValue(element);
+
+            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {
+                safeSetTimeout(updateFromModel, 0);
+                return;
+            }
+
+            var valueHasChanged = (newValue !== elementValue);
+
+            if (valueHasChanged) {
+                if (tagNameLower(element) === "select") {
+                    var allowUnset = allBindings.get('valueAllowUnset');
+                    var applyValueAction = function () {
+                        selectExtensions.writeValue(element, newValue, allowUnset);
+                    };
+                    applyValueAction();
+
+                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {
+                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
+                        // because you're not allowed to have a model value that disagrees with a visible UI selection.
+                        dependencyDetection.ignore(triggerEvent, null, [element, "change"]);
+                    } else {
+                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
+                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
+                        // to apply the value as well.
+                        safeSetTimeout(applyValueAction, 0);
+                    }
+                } else {
+                    selectExtensions.writeValue(element, newValue);
+                }
+            }
+        };
+
+        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });
+    }
+};
+
+var visible = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        var isCurrentlyVisible = !(element.style.display == "none");
+        if (value && !isCurrentlyVisible)
+            element.style.display = "";
+        else if ((!value) && isCurrentlyVisible)
+            element.style.display = "none";
+    }
+};
+
+var hidden = {
+    update: function (element, valueAccessor) {
+        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });
+    }
+};
+
+var using = {
+    init: function(element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        var innerContext = bindingContext$$1.createChildContext(valueAccessor);
+        applyBindingsToDescendants(innerContext, element);
+        return { controlsDescendantBindings: true };
+    },
+    allowVirtualElements: true
+};
+
+var bindings = {
+    attr: attr,
+    checked: checked,
+    checkedValue: checkedValue,
+    click: click,
+    css: css, 'class': css,
+    enable: enable,
+    'event': eventHandler,
+    disable: disable,
+    hasfocus: hasfocus, hasFocus: hasfocus,
+    hidden: hidden,
+    html: html,
+    'let': $let,
+    on: onHandler,
+    options: options$1,
+    selectedOptions: selectedOptions,
+    style: style,
+    submit: submit,
+    text: text,
+    textInput: textInput,
+    textinput: textInput,
+    uniqueName: uniqueName,
+    using: using,
+    value: value,
+    visible: visible
+};
+
+// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving
+// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)
+//
+// Two are provided by default:
+//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element
+//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but
+//                                           without reading/writing the actual element text content, since it will be overwritten
+//                                           with the rendered template output.
+// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.
+// Template sources need to have the following functions:
+//   text() 			- returns the template text from your storage location
+//   text(value)		- writes the supplied template text to your storage location
+//   data(key)			- reads values stored using data(key, value) - see below
+//   data(key, value)	- associates "value" with this template and the key "key". Is used to store information like "isRewritten".
+//
+// Optionally, template sources can also have the following functions:
+//   nodes()            - returns a DOM element containing the nodes of this template, where available
+//   nodes(value)       - writes the given DOM element to your storage location
+// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()
+// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().
+//
+// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were
+// using and overriding "makeTemplateSource" to return an instance of your custom template source.
+
+// ---- ko.templateSources.domElement -----
+
+// template types
+var templateScript = 1;
+var templateTextArea = 2;
+var templateTemplate = 3;
+var templateElement = 4;
+
+function domElement(element) {
+    this.domElement = element;
+
+    if (!element) { return; }
+    var tagNameLower$$1 = tagNameLower(element);
+    this.templateType =
+        tagNameLower$$1 === "script" ? templateScript :
+        tagNameLower$$1 === "textarea" ? templateTextArea :
+            // For browsers with proper <template> element support, where the .content property gives a document fragment
+        tagNameLower$$1 == "template" && element.content && element.content.nodeType === 11 ? templateTemplate :
+        templateElement;
+}
+
+domElement.prototype.text = function(/* valueToWrite */) {
+    var elemContentsProperty = this.templateType === templateScript ? "text"
+                             : this.templateType === templateTextArea ? "value"
+                             : "innerHTML";
+
+    if (arguments.length == 0) {
+        return this.domElement[elemContentsProperty];
+    } else {
+        var valueToWrite = arguments[0];
+        if (elemContentsProperty === "innerHTML")
+            setHtml(this.domElement, valueToWrite);
+        else
+            this.domElement[elemContentsProperty] = valueToWrite;
+    }
+};
+
+var dataDomDataPrefix = data.nextKey() + "_";
+domElement.prototype.data = function(key /*, valueToWrite */) {
+    if (arguments.length === 1) {
+        return data.get(this.domElement, dataDomDataPrefix + key);
+    } else {
+        data.set(this.domElement, dataDomDataPrefix + key, arguments[1]);
+    }
+};
+
+var templatesDomDataKey = data.nextKey();
+function getTemplateDomData(element) {
+    return data.get(element, templatesDomDataKey) || {};
+}
+function setTemplateDomData(element, data$$1) {
+    data.set(element, templatesDomDataKey, data$$1);
+}
+
+domElement.prototype.nodes = function(/* valueToWrite */) {
+    var element = this.domElement;
+    if (arguments.length == 0) {
+        var templateData = getTemplateDomData(element),
+            containerData = templateData.containerData;
+        return containerData || (
+            this.templateType === templateTemplate ? element.content :
+            this.templateType === templateElement ? element :
+            undefined);
+    } else {
+        var valueToWrite = arguments[0];
+        setTemplateDomData(element, {containerData: valueToWrite});
+    }
+};
+
+// ---- ko.templateSources.anonymousTemplate -----
+// Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
+// For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
+// Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
+
+function anonymousTemplate(element) {
+    this.domElement = element;
+}
+
+anonymousTemplate.prototype = new domElement();
+anonymousTemplate.prototype.constructor = anonymousTemplate;
+anonymousTemplate.prototype.text = function(/* valueToWrite */) {
+    if (arguments.length == 0) {
+        var templateData = getTemplateDomData(this.domElement);
+        if (templateData.textData === undefined && templateData.containerData)
+            templateData.textData = templateData.containerData.innerHTML;
+        return templateData.textData;
+    } else {
+        var valueToWrite = arguments[0];
+        setTemplateDomData(this.domElement, {textData: valueToWrite});
+    }
+};
+
+// If you want to make a custom template engine,
+//
+// [1] Inherit from this class (like ko.nativeTemplateEngine does)
+// [2] Override 'renderTemplateSource', supplying a function with this signature:
+//
+//        function (templateSource, bindingContext, options) {
+//            // - templateSource.text() is the text of the template you should render
+//            // - bindingContext.$data is the data you should pass into the template
+//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,
+//            //     and bindingContext.$root available in the template too
+//            // - options gives you access to any other properties set on "data-bind: { template: options }"
+//            // - templateDocument is the document object of the template
+//            //
+//            // Return value: an array of DOM nodes
+//        }
+//
+// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:
+//
+//        function (script) {
+//            // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result"
+//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'
+//        }
+//
+//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.
+//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)
+//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.
+
+function templateEngine() { }
+
+extend(templateEngine.prototype, {
+  renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {
+      options$$1.onError("Override renderTemplateSource");
+  },
+
+  createJavaScriptEvaluatorBlock: function (script) {
+      options.onError("Override createJavaScriptEvaluatorBlock");
+  },
+
+  makeTemplateSource: function(template, templateDocument) {
+      // Named template
+      if (typeof template == "string") {
+          templateDocument = templateDocument || document;
+          var elem = templateDocument.getElementById(template);
+          if (!elem)
+              options.onError("Cannot find template with ID " + template);
+          return new domElement(elem);
+      } else if ((template.nodeType == 1) || (template.nodeType == 8)) {
+          // Anonymous template
+          return new anonymousTemplate(template);
+      } else
+          options.onError("Unknown template type: " + template);
+  },
+
+  renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {
+      var templateSource = this['makeTemplateSource'](template, templateDocument);
+      return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);
+  }
+});
+
+var _templateEngine;
+
+function setTemplateEngine (tEngine) {
+  if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {
+        // TODO: ko.templateEngine to appropriate name
+    throw new Error('templateEngine must inherit from ko.templateEngine')
+  }
+  _templateEngine = tEngine;
+}
+
+function invokeForEachNodeInContinuousRange (firstNode, lastNode, action) {
+  let node;
+  let nextInQueue = firstNode;
+  let firstOutOfRangeNode = virtualElements.nextSibling(lastNode);
+  while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
+    nextInQueue = virtualElements.nextSibling(node);
+    action(node, nextInQueue);
+  }
+}
+
+function activateBindingsOnContinuousNodeArray (continuousNodeArray, bindingContext$$1, afterBindingCallback) {
+  // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
+  // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
+  // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
+  // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
+  // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
+
+  if (continuousNodeArray.length) {
+    var firstNode = continuousNodeArray[0];
+    var lastNode = continuousNodeArray[continuousNodeArray.length - 1];
+    var parentNode = firstNode.parentNode;
+    var provider = options.bindingProviderInstance;
+    var preprocessNode = provider.preprocessNode;
+
+    if (preprocessNode) {
+      invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {
+        var nodePreviousSibling = node.previousSibling;
+        var newNodes = preprocessNode.call(provider, node);
+        if (newNodes) {
+          if (node === firstNode) { firstNode = newNodes[0] || nextNodeInRange; }
+          if (node === lastNode) { lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling; }
+        }
+      });
+
+      // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.
+      // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real
+      // first node needs to be in the array).
+      continuousNodeArray.length = 0;
+      if (!firstNode) { // preprocessNode might have removed all the nodes, in which case there's nothing left to do
+        return
+      }
+      if (firstNode === lastNode) {
+        continuousNodeArray.push(firstNode);
+      } else {
+        continuousNodeArray.push(firstNode, lastNode);
+        fixUpContinuousNodeArray(continuousNodeArray, parentNode);
+      }
+    }
+
+    // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
+    // whereas a regular applyBindings won't introduce new memoized nodes
+    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {
+      if (node.nodeType === 1 || node.nodeType === 8) { applyBindings(bindingContext$$1, node).then(afterBindingCallback); }
+    });
+    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {
+      if (node.nodeType === 1 || node.nodeType === 8) { memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]); }
+    });
+
+    // Make sure any changes done by applyBindings or unmemoize are reflected in the array
+    fixUpContinuousNodeArray(continuousNodeArray, parentNode);
+  }
+}
+
+function getFirstNodeFromPossibleArray (nodeOrNodeArray) {
+  return nodeOrNodeArray.nodeType ? nodeOrNodeArray
+                                    : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
+                                    : null
+}
+
+function executeTemplate (targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {
+  options$$1 = options$$1 || {};
+  var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+  var templateDocument = (firstTargetNode || template || {}).ownerDocument;
+  var templateEngineToUse = (options$$1.templateEngine || _templateEngine);
+  var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);
+
+    // Loosely check result is an array of DOM nodes
+  if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) { throw new Error('Template engine must return an array of DOM nodes') }
+
+  var haveAddedNodesToParent = false;
+  switch (renderMode) {
+    case 'replaceChildren':
+      virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
+      haveAddedNodesToParent = true;
+      break
+    case 'replaceNode':
+      replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
+      haveAddedNodesToParent = true;
+      break
+    case 'ignoreTargetNode': break
+    default:
+      throw new Error('Unknown renderMode: ' + renderMode)
+  }
+
+  if (haveAddedNodesToParent) {
+    activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);
+    if (options$$1.afterRender) { dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]); }
+  }
+
+  return renderedNodesArray
+}
+
+function resolveTemplateName (template, data$$1, context) {
+    // The template can be specified as:
+  if (isObservable(template)) {
+    // 1. An observable, with string value
+    return template()
+  } else if (typeof template === 'function') {
+    // 2. A function of (data, context) returning a string
+    return template(data$$1, context)
+  } else {
+    // 3. A string
+    return template
+  }
+}
+
+function renderTemplate (template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {
+  options$$1 = options$$1 || {};
+  if ((options$$1.templateEngine || _templateEngine) === undefined) { throw new Error('Set a template engine before calling renderTemplate') }
+  renderMode = renderMode || 'replaceChildren';
+
+  if (targetNodeOrNodeArray) {
+    var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+
+    var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode) }; // Passive disposal (on next evaluation)
+    var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;
+
+    return computed( // So the DOM is automatically updated when any dependency changes
+      function () {
+        // Ensure we've got a proper binding context to work with
+        var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))
+              ? dataOrBindingContext
+              : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });
+
+        var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);
+        const renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);
+
+        if (renderMode === 'replaceNode') {
+          targetNodeOrNodeArray = renderedNodesArray;
+          firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+        }
+      },
+      null,
+      { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }
+    )
+  } else {
+        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node
+    return memoization.memoize(function (domNode) {
+      renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');
+    })
+  }
+}
+
+function renderTemplateForEach (template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {
+    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
+    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
+  var arrayItemContext;
+
+    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
+  function executeTemplateForArrayItem (arrayValue, index) {
+        // Support selecting template as a function of the data being rendered
+    arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {
+      context['$index'] = index;
+    });
+
+    var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);
+    return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback)
+  }
+
+    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
+  var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {
+    activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);
+    if (options$$1['afterRender']) { options$$1['afterRender'](addedNodesArray, arrayValue); }
+
+        // release the "cache" variable, so that it can be collected by
+        // the GC when its value isn't used from within the bindings anymore.
+    arrayItemContext = null;
+  };
+
+  return computed(function () {
+    var unwrappedArray = unwrap(arrayOrObservableArray) || [];
+    if (typeof unwrappedArray.length !== 'number') { unwrappedArray = [unwrappedArray]; }
+
+    // Filter out any entries marked as destroyed
+    var filteredArray = arrayFilter(unwrappedArray, function (item) {
+      return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy'])
+    });
+
+    // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
+    // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
+    dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);
+  }, null, { disposeWhenNodeIsRemoved: targetNode })
+}
+
+let templateComputedDomDataKey = data.nextKey();
+
+class TemplateBindingHandler extends AsyncBindingHandler {
+  constructor (params) {
+    super(params);
+    const element = this.$element;
+    const bindingValue = unwrap(this.value);
+    let container;
+
+    // Expose 'conditional' for `else` chaining.
+    data.set(element, 'conditional', {
+      elseChainSatisfied: observable(true)
+    });
+
+    // Support anonymous templates
+    if (typeof bindingValue === 'string' || bindingValue.name) {
+            // It's a named template - clear the element
+      virtualElements.emptyNode(element);
+    } else if ('nodes' in bindingValue) {
+            // We've been given an array of DOM nodes. Save them as the template source.
+            // There is no known use case for the node array being an observable array (if the output
+            // varies, put that behavior *into* your template - that's what templates are for), and
+            // the implementation would be a mess, so assert that it's not observable.
+      var nodes = bindingValue.nodes || [];
+      if (isObservable(nodes)) {
+        throw new Error('The "nodes" option must be a plain, non-observable array.')
+      }
+      container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent
+      new anonymousTemplate(element)['nodes'](container);
+    } else {
+            // It's an anonymous template - store the element contents, then clear the element
+      const templateNodes = virtualElements.childNodes(element);
+      container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
+      new anonymousTemplate(element).nodes(container);
+    }
+    this.computed(this.onValueChange.bind(this));
+  }
+
+  onValueChange () {
+    const element = this.$element;
+    const bindingContext$$1 = this.$context;
+    var value = this.value;
+    var options$$1 = unwrap(value);
+    var shouldDisplay = true;
+    var templateComputed = null;
+    var elseChainSatisfied = data.get(element, 'conditional').elseChainSatisfied;
+    var templateName;
+
+    if (typeof options$$1 === 'string') {
+      templateName = value;
+      options$$1 = {};
+    } else {
+      templateName = options$$1.name;
+
+      // Support "if"/"ifnot" conditions
+      if ('if' in options$$1) {
+        shouldDisplay = unwrap(options$$1.if);
+      }
+
+      if (shouldDisplay && 'ifnot' in options$$1) {
+        shouldDisplay = !unwrap(options$$1.ifnot);
+      }
+    }
+
+    if ('foreach' in options$$1) {
+      // Render once for each data point (treating data set as empty if shouldDisplay==false)
+      var dataArray = (shouldDisplay && options$$1.foreach) || [];
+      templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);
+
+      elseChainSatisfied((unwrap(dataArray) || []).length !== 0);
+    } else if (shouldDisplay) {
+      // Render once for this single data point (or use the viewModel if no data was provided)
+      var innerBindingContext = ('data' in options$$1)
+        ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as)  // Given an explitit 'data' value, we create a child binding context for it
+        : bindingContext$$1;                                                        // Given no explicit 'data' value, we retain the same binding context
+      templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);
+      elseChainSatisfied(true);
+    } else {
+      virtualElements.emptyNode(element);
+      elseChainSatisfied(false);
+    }
+
+    // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
+    this.disposeOldComputedAndStoreNewOne(element, templateComputed);
+  }
+
+  disposeOldComputedAndStoreNewOne (element, newComputed) {
+    let oldComputed = data.get(element, templateComputedDomDataKey);
+    if (oldComputed && (typeof oldComputed.dispose === 'function')) { oldComputed.dispose(); }
+    data.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
+  }
+
+  get controlsDescendants () { return true }
+  static get allowVirtualElements () { return true }
+}
+
+function nativeTemplateEngine () {
+}
+
+nativeTemplateEngine.prototype = new templateEngine();
+nativeTemplateEngine.prototype.constructor = nativeTemplateEngine;
+nativeTemplateEngine.prototype.renderTemplateSource = function(templateSource, bindingContext$$1, options$$1, templateDocument) {
+    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly
+        templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null,
+        templateNodes = templateNodesFunc ? templateSource.nodes() : null;
+
+    if (templateNodes) {
+        return makeArray(templateNodes.cloneNode(true).childNodes);
+    } else {
+        var templateText = templateSource.text();
+        return parseHtmlFragment(templateText, templateDocument);
+    }
+};
+
+
+nativeTemplateEngine.instance = new nativeTemplateEngine();
+setTemplateEngine(nativeTemplateEngine.instance);
+
+// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
+// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
+class TemplateForEachBindingHandler extends TemplateBindingHandler {
+  get value () {
+    const modelValue = this.valueAccessor();
+    const unwrappedValue = peek(modelValue);    // Unwrap without setting a dependency here
+
+        // If unwrappedValue is the array, pass in the wrapped value on its own
+        // The value will be unwrapped and tracked within the template binding
+        // (See https://github.com/SteveSanderson/knockout/issues/523)
+    if (!unwrappedValue || typeof unwrappedValue.length === 'number') {
+      return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance }
+    }
+
+    // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
+    unwrap(modelValue);
+    return {
+      foreach: unwrappedValue.data,
+      as: unwrappedValue.as,
+      includeDestroyed: unwrappedValue.includeDestroyed,
+      afterAdd: unwrappedValue.afterAdd,
+      beforeRemove: unwrappedValue.beforeRemove,
+      afterRender: unwrappedValue.afterRender,
+      beforeMove: unwrappedValue.beforeMove,
+      afterMove: unwrappedValue.afterMove,
+      templateEngine: nativeTemplateEngine.instance
+    }
+  }
+}
+
+//    'let': letBinding,
+//    template: template,
+
+const bindings$1 = {
+  foreach: TemplateForEachBindingHandler,
+  template: TemplateBindingHandler
+};
+
+/**
+ * Test a node for whether it represents an "else" condition.
+ * @param  {HTMLElement}  node to be tested
+ * @return {Boolean}      true when
+ *
+ * Matches <!-- else -->
+ */
+function isElseNode (node) {
+  return node.nodeType === 8 &&
+        node.nodeValue.trim().toLowerCase() === 'else'
+}
+
+function detectElse (element) {
+  var children = virtualElements.childNodes(element);
+  for (var i = 0, j = children.length; i < j; ++i) {
+    if (isElseNode(children[i])) { return true }
+  }
+  return false
+}
+
+/**
+ * Clone the nodes, returning `ifNodes`, `elseNodes`
+ * @param  {HTMLElement} element The nodes to be cloned
+ * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.
+ * @return {object}         Containing the cloned nodes.
+ */
+function cloneIfElseNodes (element, hasElse) {
+  const children = virtualElements.childNodes(element);
+  const ifNodes = [];
+  const elseNodes = [];
+  let target = ifNodes;
+
+  for (var i = 0, j = children.length; i < j; ++i) {
+    if (hasElse && isElseNode(children[i])) {
+      target = elseNodes;
+      hasElse = false;
+    } else {
+      target.push(cleanNode(children[i].cloneNode(true)));
+    }
+  }
+
+  return { ifNodes, elseNodes }
+}
+
+/**
+ * Create a DOMbinding that controls DOM nodes presence
+ *
+ * Covers e.g.
+ *
+ * 1. DOM Nodes contents
+ *
+ * <div data-bind='if: x'>
+ * <!-- else --> ... an optional "if"
+ * </div>
+ *
+ * 2. Virtual elements
+ *
+ * <!-- ko if: x -->
+ * <!-- else -->
+ * <!-- /ko -->
+ *
+ * 3. Else binding
+ * <div data-bind='if: x'></div>
+ * <div data-bind='else'></div>
+ */
+class ConditionalBindingHandler extends AsyncBindingHandler {
+  constructor (params) {
+    super(params);
+    this.hasElse = detectElse(this.$element);
+    const elseChainSatisfied = this.completesElseChain = observable();
+
+    data.set(this.$element, 'conditional', { elseChainSatisfied });
+
+    this.computed(this.render.bind(this));
+  }
+
+  get elseChainIsAlreadySatisfied () { return false }
+  get needsRefresh () {
+    return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate
+  }
+  get shouldDisplayIf () { return !!unwrap(this.value) }
+
+  getIfElseNodes () {
+    if (this.ifElseNodes) { return this.ifElseNodes }
+    if (dependencyDetection.getDependenciesCount() || this.hasElse) {
+      return cloneIfElseNodes(this.$element, this.hasElse)
+    }
+  }
+
+  render () {
+    // Create any dependencies on values created in value-functions.
+    if (typeof this.value === 'function') { this.value(); }
+    const isFirstRender = !this.ifElseNodes;
+    let shouldDisplayIf = this.shouldDisplayIf;
+    let needsRefresh = this.needsRefresh;
+
+    if (this.elseChainIsAlreadySatisfied) {
+      shouldDisplayIf = false;
+      needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;
+      this.completesElseChain(true);
+    } else {
+      this.completesElseChain(this.shouldDisplayIf);
+    }
+
+    if (!needsRefresh) { return }
+
+    this.ifElseNodes = this.getIfElseNodes();
+
+    if (shouldDisplayIf) {
+      if (!isFirstRender || this.hasElse) {
+        virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));
+      }
+    } else if (this.ifElseNodes) {
+      virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));
+    } else {
+      virtualElements.emptyNode(this.$element);
+    }
+
+    applyBindingsToDescendants(this.bindingContext, this.$element)
+      .then(this.completeBinding);
+
+    this.didDisplayOnLastUpdate = shouldDisplayIf;
+  }
+
+  get bindingContext () { return this.$context }
+  get controlsDescendants () { return true }
+  static get allowVirtualElements () { return true }
+}
+
+class IfBindingHandler extends ConditionalBindingHandler {}
+
+class UnlessBindingHandler extends ConditionalBindingHandler {
+  get shouldDisplayIf () { return !super.shouldDisplayIf }
+}
+
+class ElseBindingHandler extends ConditionalBindingHandler {
+  get shouldDisplayIf () { return super.shouldDisplayIf || this.value === undefined }
+
+  /**
+   * Return any conditional that precedes the given node.
+   * @return {object}      { elseChainSatisfied: observable }
+   */
+  get elseChainIsAlreadySatisfied () {
+    if (!this._elseChain) { this._elseChain = this.readElseChain(); }
+    return unwrap(this._elseChain.elseChainSatisfied)
+  }
+
+  readElseChain () {
+    let node = this.$element;
+    do {
+      node = node.previousSibling;
+    } while (node && node.nodeType !== 1 && node.nodeType !== 8)
+
+    if (!node) { return false }
+
+    if (node.nodeType === 8) {
+      node = virtualElements.previousSibling(node);
+    }
+
+    return data.get(node, 'conditional') || {}
+  }
+}
+
+class WithBindingHandler extends ConditionalBindingHandler {
+  get needsRefresh () { return true }
+  get bindingContext () {
+    return this.$context.createStaticChildContext(this.value)
+  }
+}
+
+const bindings$2 = {
+  'if': IfBindingHandler,
+  'with': WithBindingHandler,
+  ifnot: UnlessBindingHandler,
+  unless: UnlessBindingHandler,
+  'else': ElseBindingHandler,
+  'elseif': ElseBindingHandler
+};
+
+// index.js
+// --------
+// Fast For Each
+//
+// Employing sound techniques to make a faster Knockout foreach binding.
+// --------
+
+//      Utilities
+const MAX_LIST_SIZE = 9007199254740991;
+
+// from https://github.com/jonschlinkert/is-plain-object
+function isPlainObject (o) {
+  return !!o && typeof o === 'object' && o.constructor === Object
+}
+
+const supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';
+
+// Get a copy of the (possibly virtual) child nodes of the given element,
+// put them into a container, then empty the given node.
+function makeTemplateNode (sourceNode) {
+  var container = document.createElement('div');
+  var parentNode;
+  if (sourceNode.content) {
+    // For e.g. <template> tags
+    parentNode = sourceNode.content;
+  } else if (sourceNode.tagName === 'SCRIPT') {
+    parentNode = document.createElement('div');
+    parentNode.innerHTML = sourceNode.text;
+  } else {
+    // Anything else e.g. <div>
+    parentNode = sourceNode;
+  }
+  arrayForEach(virtualElements.childNodes(parentNode), function (child) {
+    // FIXME - This cloneNode could be expensive; we may prefer to iterate over the
+    // parentNode children in reverse (so as not to foul the indexes as childNodes are
+    // removed from parentNode when inserted into the container)
+    if (child) {
+      container.insertBefore(child.cloneNode(true), null);
+    }
+  });
+  return container
+}
+
+// Mimic a KO change item 'add'
+function valueToChangeAddItem (value, index) {
+  return {
+    status: 'added',
+    value: value,
+    index: index
+  }
+}
+
+// store a symbol for caching the pending delete info index in the data item objects
+const PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');
+
+// Extend the given context with a $index (passed in via the createChildContext)
+function extend$context (include$index, $context) {
+  if (include$index) { $context.$index = observable(); }
+  $context.$list = this.data;
+}
+
+class ForEachBinding extends AsyncBindingHandler {
+  // NOTE: valid valueAccessors include:
+  //    []
+  //    observable([])
+  //    observableArray([])
+  //    computed
+  //    {data: array, name: string, as: string}
+
+  constructor (params) {
+    super(params);
+    const settings = {};
+    if (isPlainObject(this.value)) {
+      Object.assign(settings, this.value);
+    }
+
+    this.noIndex = settings.noIndex || this.allBindings.get('noIndex');
+    this.as = settings.as || this.allBindings.get('as');
+
+    this.data = settings.data || (unwrap(this.$context.$rawData) === this.value ? this.$context.$rawData : this.value);
+
+    this.container = virtualElements.isStartComment(this.$element)
+                     ? this.$element.parentNode : this.$element;
+    this.generateContext = this.createContextGenerator(this.as, !this.noIndex);
+    if (this.noIndex) { this.updateIndexes = false; }
+
+    this.templateNode = makeTemplateNode(
+      settings.templateNode || (settings.name
+        ? document.getElementById(settings.name).cloneNode(true)
+        : this.$element)
+    )
+
+    ;['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']
+      .forEach(p => { this[p] = settings[p] || this.allBindings.get(p); });
+
+    this.changeQueue = [];
+    this.firstLastNodesList = [];
+    this.indexesToDelete = [];
+    this.rendering_queued = false;
+    this.pendingDeletes = [];
+
+    // Expose the conditional so that if the `foreach` data is empty, successive
+    // 'else' bindings will appear.
+    this.isNotEmpty = observable(Boolean(unwrap(this.data).length));
+    data.set(this.$element, 'conditional', {
+      elseChainSatisfied: this.isNotEmpty
+    });
+
+    // Remove existing content.
+    virtualElements.emptyNode(this.$element);
+
+    // Prime content
+    const primeData = unwrap(this.data);
+    if (primeData.map) {
+      this.onArrayChange(primeData.map(valueToChangeAddItem), true);
+    } else {
+      this.completeBinding();
+    }
+
+    // Watch for changes
+    if (isObservable(this.data)) {
+      if (!this.data.indexOf) {
+        // Make sure the observable is trackable.
+        this.data = this.data.extend({ trackArrayChanges: true });
+      }
+      this.changeSubs = this.data.subscribe(this.onArrayChange, this, 'arrayChange');
+    }
+  }
+
+  dispose () {
+    if (this.changeSubs) {
+      this.changeSubs.dispose();
+    }
+    this.flushPendingDeletes();
+  }
+
+  // If the array changes we register the change.
+  onArrayChange (changeSet, isInitial) {
+    var changeMap = {
+      added: [],
+      deleted: []
+    };
+
+    // knockout array change notification index handling:
+    // - sends the original array indexes for deletes
+    // - sends the new array indexes for adds
+    // - sorts them all by index in ascending order
+    // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked
+    for (var i = 0, len = changeSet.length; i < len; i++) {
+      if (changeMap.added.length && changeSet[i].status === 'added') {
+        var lastAdd = changeMap.added[changeMap.added.length - 1];
+        var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;
+        if (lastIndex + 1 === changeSet[i].index) {
+          if (!lastAdd.isBatch) {
+            // transform the last addition into a batch addition object
+            lastAdd = {
+              isBatch: true,
+              status: 'added',
+              index: lastAdd.index,
+              values: [lastAdd.value]
+            };
+            changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);
+          }
+          lastAdd.values.push(changeSet[i].value);
+          continue
+        }
+      }
+
+      changeMap[changeSet[i].status].push(changeSet[i]);
+    }
+
+    if (changeMap.deleted.length > 0) {
+      this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);
+      this.changeQueue.push({ status: 'clearDeletedIndexes' });
+    }
+
+    this.changeQueue.push.apply(this.changeQueue, changeMap.added);
+    // Once a change is registered, the ticking count-down starts for the processQueue.
+    if (this.changeQueue.length > 0 && !this.rendering_queued) {
+      this.rendering_queued = true;
+      if (isInitial) {
+        this.processQueue();
+      } else {
+        ForEachBinding.animateFrame.call(window, () => this.processQueue());
+      }
+    }
+  }
+
+  startQueueFlush () {
+    // Callback so folks can do things before the queue flush.
+    if (typeof this.beforeQueueFlush === 'function') {
+      this.beforeQueueFlush(this.changeQueue);
+    }
+  }
+
+  endQueueFlush () {
+    // Callback so folks can do things.
+    if (typeof this.afterQueueFlush === 'function') {
+      this.afterQueueFlush(this.changeQueue);
+    }
+  }
+
+  // Reflect all the changes in the queue in the DOM, then wipe the queue.
+  processQueue () {
+    var isEmpty = !unwrap(this.data).length;
+    var lowestIndexChanged = MAX_LIST_SIZE;
+
+    this.startQueueFlush();
+
+    arrayForEach(this.changeQueue, (changeItem) => {
+      if (typeof changeItem.index === 'number') {
+        lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);
+      }
+      this[changeItem.status](changeItem);
+    });
+    this.flushPendingDeletes();
+    this.rendering_queued = false;
+
+    // Update our indexes.
+    if (this.updateIndexes) { this.updateIndexes(lowestIndexChanged); }
+
+    this.endQueueFlush();
+    this.changeQueue = [];
+
+    // Update the conditional exposed on the domData
+    if (isEmpty !== !this.isNotEmpty()) {
+      this.isNotEmpty(!isEmpty);
+    }
+  }
+
+  /**
+   * Return a function that generates the context for a given node.
+   *
+   * We generate a single function that reduces our inner-loop calculations,
+   * which has a good chance of being optimized by the browser.
+   *
+   * @param  {string} as  The name given to each item in the list
+   * @param  {bool} index Whether to calculate indexes
+   * @return {function}   A function(dataValue) that returns the context
+   */
+  createContextGenerator (as, index) {
+    var $context = this.$context;
+    switch ((as && 1) | (index && 2)) {
+      case 0: // no-as & no-index
+        return function (v) {
+          return $context.createChildContext(v, null, extend$context.bind(this, false))
+        }
+
+      case 1: // as + no-index
+        return function (v) {
+          var obj = { $index: undefined, $list: this.data };
+          obj[as] = v;
+          return $context.extend(obj)
+        }
+
+      case 2: // no-as + index
+        return function (v) {
+          return $context.createChildContext(v, null, extend$context.bind(this, true))
+        }
+
+      case 3: // as + index
+        return function (v) {
+          var obj = { $index: observable(), $list: this.data };
+          obj[as] = v;
+          return $context.extend(obj)
+        }
+    }
+  }
+
+  // Process a changeItem with {status: 'added', ...}
+  added (changeItem) {
+    var index = changeItem.index;
+    var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];
+    var referenceElement = this.getLastNodeBeforeIndex(index);
+    // gather all childnodes for a possible batch insertion
+    const allChildNodes = [];
+    const asyncBindingResults = [];
+    var children;
+
+    for (var i = 0, len = valuesToAdd.length; i < len; ++i) {
+      // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset
+      var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);
+      if (pendingDelete && pendingDelete.nodesets.length) {
+        children = pendingDelete.nodesets.pop();
+      } else {
+        var templateClone = this.templateNode.cloneNode(true);
+        // Apply bindings first, and then process child nodes,
+        // because bindings can add childnodes.
+        const bindingResult = applyBindingsToDescendants(
+          this.generateContext(valuesToAdd[i]), templateClone
+        );
+
+        asyncBindingResults.push(bindingResult);
+
+        children = virtualElements.childNodes(templateClone);
+      }
+
+      // Note discussion at https://github.com/angular/angular.js/issues/7851
+      allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));
+      this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });
+    }
+
+    if (typeof this.afterAdd === 'function') {
+      this.afterAdd({
+        nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),
+        foreachInstance: this
+      });
+    } else {
+      this.insertAllAfter(allChildNodes, referenceElement);
+    }
+
+    this.completeBinding(options.Promise.all(asyncBindingResults));
+  }
+
+  getNodesForIndex (index) {
+    let result = [];
+    let ptr = this.firstLastNodesList[index].first;
+    let last = this.firstLastNodesList[index].last;
+    result.push(ptr);
+    while (ptr && ptr !== last) {
+      ptr = ptr.nextSibling;
+      result.push(ptr);
+    }
+    return result
+  }
+
+  getLastNodeBeforeIndex (index) {
+    if (index < 1 || index - 1 >= this.firstLastNodesList.length) { return null }
+    return this.firstLastNodesList[index - 1].last
+  }
+
+  /**
+   * Get the active (focused) node, if it's a child of the given node.
+   */
+  activeChildElement (node) {
+    var active = document.activeElement;
+    if (domNodeIsContainedBy(active, node)) {
+      return active
+    }
+  }
+
+  insertAllAfter (nodeOrNodeArrayToInsert, insertAfterNode) {
+    let frag;
+    let len;
+    let i;
+    let active = null;
+    let containerNode = this.$element;
+
+    // Poor man's node and array check.
+    if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {
+      throw new Error('Expected a single node or a node array')
+    }
+    if (nodeOrNodeArrayToInsert.nodeType !== undefined) {
+      active = this.activeChildElement(nodeOrNodeArrayToInsert);
+      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);
+      return [nodeOrNodeArrayToInsert]
+    } else if (nodeOrNodeArrayToInsert.length === 1) {
+      active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);
+      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);
+    } else if (supportsDocumentFragment) {
+      frag = document.createDocumentFragment();
+      for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {
+        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);
+        frag.appendChild(nodeOrNodeArrayToInsert[i]);
+      }
+      virtualElements.insertAfter(containerNode, frag, insertAfterNode);
+    } else {
+      // Nodes are inserted in reverse order - pushed down immediately after
+      // the last node for the previous item or as the first node of element.
+      for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {
+        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);
+        var child = nodeOrNodeArrayToInsert[i];
+        if (!child) { break }
+        virtualElements.insertAfter(containerNode, child, insertAfterNode);
+      }
+    }
+
+    if (active) { active.focus(); }
+
+    return nodeOrNodeArrayToInsert
+  }
+
+  // checks if the deleted data item should be handled with delay for a possible reuse at additions
+  shouldDelayDeletion (data$$1) {
+    return data$$1 && (typeof data$$1 === 'object' || typeof data$$1 === 'function')
+  }
+
+  // gets the pending deletion info for this data item
+  getPendingDeleteFor (data$$1) {
+    var index = data$$1 && data$$1[PENDING_DELETE_INDEX_SYM];
+    if (index === undefined) return null
+    return this.pendingDeletes[index]
+  }
+
+  // tries to find the existing pending delete info for this data item, and if it can't, it registeres one
+  getOrCreatePendingDeleteFor (data$$1) {
+    var pd = this.getPendingDeleteFor(data$$1);
+    if (pd) {
+      return pd
+    }
+    pd = {
+      data: data$$1,
+      nodesets: []
+    };
+    data$$1[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;
+    this.pendingDeletes.push(pd);
+    return pd
+  }
+
+  // Process a changeItem with {status: 'deleted', ...}
+  deleted (changeItem) {
+    // if we should delay the deletion of this data, we add the nodeset to the pending delete info object
+    if (this.shouldDelayDeletion(changeItem.value)) {
+      let pd = this.getOrCreatePendingDeleteFor(changeItem.value);
+      pd.nodesets.push(this.getNodesForIndex(changeItem.index));
+    } else { // simple data, just remove the nodes
+      this.removeNodes(this.getNodesForIndex(changeItem.index));
+    }
+    this.indexesToDelete.push(changeItem.index);
+  }
+
+  // removes a set of nodes from the DOM
+  removeNodes (nodes) {
+    if (!nodes.length) { return }
+
+    function removeFn () {
+      var parent = nodes[0].parentNode;
+      for (var i = nodes.length - 1; i >= 0; --i) {
+        cleanNode(nodes[i]);
+        parent.removeChild(nodes[i]);
+      }
+    }
+
+    if (this.beforeRemove) {
+      var beforeRemoveReturn = this.beforeRemove({
+        nodesToRemove: nodes, foreachInstance: this
+      }) || {};
+      // If beforeRemove returns a `then`–able e.g. a Promise, we remove
+      // the nodes when that thenable completes.  We pass any errors to
+      // ko.onError.
+      if (typeof beforeRemoveReturn.then === 'function') {
+        beforeRemoveReturn.then(removeFn, options.onError);
+      }
+    } else {
+      removeFn();
+    }
+  }
+
+  // flushes the pending delete info store
+  // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up
+  // we also call it on dispose not to leave any mess
+  flushPendingDeletes () {
+    for (let i = 0, len = this.pendingDeletes.length; i !== len; ++i) {
+      var pd = this.pendingDeletes[i];
+      while (pd.nodesets.length) {
+        this.removeNodes(pd.nodesets.pop());
+      }
+      if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) { delete pd.data[PENDING_DELETE_INDEX_SYM]; }
+    }
+    this.pendingDeletes = [];
+  }
+
+  // We batch our deletion of item indexes in our parallel array.
+  // See brianmhunt/knockout-fast-foreach#6/#8
+  clearDeletedIndexes () {
+    // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine
+    // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.
+    for (let i = this.indexesToDelete.length - 1; i >= 0; --i) {
+      this.firstLastNodesList.splice(this.indexesToDelete[i], 1);
+    }
+    this.indexesToDelete = [];
+  }
+
+  updateIndexes (fromIndex) {
+    let ctx;
+    for (let i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {
+      ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);
+      if (ctx) { ctx.$index(i); }
+    }
+  }
+
+  getContextStartingFrom (node) {
+    let ctx;
+    while (node) {
+      ctx = contextFor(node);
+      if (ctx) { return ctx }
+      node = node.nextSibling;
+    }
+  }
+
+  /**
+   * Set whether the binding is always synchronous.
+   * Useful during testing.
+   */
+  static setSync (toggle) {
+    const w = options.global;
+    if (toggle) {
+      ForEachBinding.animateFrame = function (frame) { frame(); };
+    } else {
+      ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||
+        w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||
+        function (cb) { return w.setTimeout(cb, 1000 / 60) };
+    }
+  }
+
+  get controlsDescendants () { return true }
+  static get allowVirtualElements () { return true }
+
+  /* TODO: Remove; for legacy/testing */
+  static get ForEach () { return this }
+  static get PENDING_DELETE_INDEX_SYM () { return PENDING_DELETE_INDEX_SYM }
+}
+
+var bindings$3 = {
+  foreach: ForEachBinding
+};
+
+// By default, foreach will be async.
+ForEachBinding.setSync(false);
+
+var sproto = String.prototype;
+
+var filters = {};
+
+// Convert value to uppercase
+filters.uppercase = function(value) {
+    return sproto.toUpperCase.call(unwrap(value));
+};
+
+// Convert value to lowercase
+filters.lowercase = function(value) {
+    return sproto.toLowerCase.call(unwrap(value));
+};
+
+// Return default value if the input value is empty or null
+filters['default'] = function (value, defaultValue) {
+    value = unwrap(value);
+    if (typeof value === "function") {
+        return value;
+    }
+    if (typeof value === "string") {
+        return sproto.trim.call(value) === '' ? defaultValue : value;
+    }
+    return value == null || value.length == 0 ? defaultValue : value;
+};
+
+// Return the value with the search string replaced with the replacement string
+filters.replace = function(value, search, replace) {
+    return sproto.replace.call(unwrap(value), search, replace);
+};
+
+filters.fit = function(value, length, replacement, trimWhere) {
+    value = unwrap(value);
+    if (length && ('' + value).length > length) {
+        replacement = '' + (replacement || '...');
+        length = length - replacement.length;
+        value = '' + value;
+        switch (trimWhere) {
+            case 'left':
+                return replacement + value.slice(-length);
+            case 'middle':
+                var leftLen = Math.ceil(length / 2);
+                return value.substr(0, leftLen) + replacement + value.slice(leftLen-length);
+            default:
+                return value.substr(0, length) + replacement;
+        }
+    } else {
+        return value;
+    }
+};
+
+// Convert a model object to JSON
+filters.json = function(rootObject, space, replacer) {
+       // replacer and space are optional
+    return JSON.stringify(toJS(rootObject), replacer, space);
+};
+
+// Format a number using the browser's toLocaleString
+filters.number = function(value) {
+    return (+unwrap(value)).toLocaleString();
+};
+
+//
+// Binding Handler for Components
+//
+
+var componentLoadingOperationUniqueId = 0;
+
+class ComponentBinding extends AsyncBindingHandler {
+  constructor (params) {
+    super(params);
+    this.originalChildNodes = makeArray(
+      virtualElements.childNodes(this.$element)
+    );
+    this.computed('computeApplyComponent');
+  }
+
+  cloneTemplateIntoElement (componentName, componentDefinition, element) {
+    const template = componentDefinition['template'];
+    if (!template) {
+      throw new Error('Component \'' + componentName + '\' has no template')
+    }
+    const clonedNodesArray = cloneNodes(template);
+    virtualElements.setDomNodeChildren(element, clonedNodesArray);
+  }
+
+  createViewModel (componentDefinition, element, originalChildNodes, componentParams) {
+    const componentViewModelFactory = componentDefinition.createViewModel;
+    return componentViewModelFactory
+      ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })
+      : componentParams // Template-only component
+  }
+
+  computeApplyComponent () {
+    const value = unwrap(this.value);
+    let componentName;
+    let componentParams;
+
+    if (typeof value === 'string') {
+      componentName = value;
+    } else {
+      componentName = unwrap(value['name']);
+      componentParams = unwrap(value['params']);
+    }
+
+    this.latestComponentName = componentName;
+
+    if (!componentName) {
+      throw new Error('No component name specified')
+    }
+
+    this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;
+    index$1.get(componentName, (defn) => this.applyComponentDefinition(componentName, componentParams, defn));
+  }
+
+  applyComponentDefinition (componentName, componentParams, componentDefinition) {
+    // If this is not the current load operation for this element, ignore it.
+    if (this.currentLoadingOperationId !== this.loadingOperationId ||
+        this.latestComponentName !== componentName) { return }
+
+    // Clean up previous state
+    this.cleanUpState();
+
+    const element = this.$element;
+
+    // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.
+    if (!componentDefinition) {
+      throw new Error('Unknown component \'' + componentName + '\'')
+    }
+    this.cloneTemplateIntoElement(componentName, componentDefinition, element);
+
+    const componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);
+
+    if (componentViewModel instanceof LifeCycle) {
+      componentViewModel.anchorTo(this.$element);
+    }
+
+    const ctxExtender = (ctx) => Object.assign(ctx, {
+      $component: componentViewModel,
+      $componentTemplateNodes: this.originalChildNodes
+    });
+
+    const childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);
+    this.currentViewModel = componentViewModel;
+
+    applyBindingsToDescendants(childBindingContext, this.$element)
+      .then(this.completeBinding);
+  }
+
+  cleanUpState () {
+    const currentView = this.currentViewModel;
+    const currentViewDispose = currentView && currentView.dispose;
+    if (typeof currentViewDispose === 'function') {
+      currentViewDispose.call(currentView);
+    }
+    this.currentViewModel = null;
+    // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion
+    this.currentLoadingOperationId = null;
+  }
+
+  dispose () {
+    this.cleanUpState();
+    super.dispose();
+  }
+
+  get controlsDescendants () { return true }
+  static get allowVirtualElements () { return true }
+}
+
+var bindings$4 = { component: ComponentBinding };
+
+/* eslint semi: 0 */
+var coreUtils = {};
+
+arrayForEach([
+  'extend',
+  'setTimeout',
+  'arrayForEach',
+  'arrayFirst',
+  'arrayFilter',
+  'arrayGetDistinctValues',
+  'arrayIndexOf',
+  'arrayMap',
+  'arrayPushAll',
+  'arrayRemoveItem',
+  'getFormFields',
+  'peekObservable',
+  'postJson',
+  'parseJson',
+  'registerEventHandler',
+  'stringifyJson',
+  'range',
+  'toggleDomNodeCssClass',
+  'triggerEvent',
+  'unwrapObservable',
+  'objectForEach',
+  'addOrRemoveItem',
+  'setTextContent',
+  'domData',
+  'parseHtmlFragment',
+  'setHtml',
+  'compareArrays',
+  'setDomNodeChildrenFromArrayMapping'
+], function (coreUtil) {
+  coreUtils[coreUtil] = utils[coreUtil];
+});
+
+coreUtils.domNodeDisposal = {
+  addDisposeCallback: addDisposeCallback,
+  otherNodeCleanerFunctions: otherNodeCleanerFunctions,
+  removeDisposeCallback: removeDisposeCallback,
+  removeNode: removeNode
+};
+
+extend(coreUtils, {
+  setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,
+  unwrapObservable: unwrap,
+  peekObservable: peek
+});
+
+// Create the binding provider and default bindings.
+const provider = new MultiProvider({
+  globals: options.bindingGlobals,
+  providers: [
+    new AttributeMustacheProvider(),
+    new TextMustacheProvider(),
+    new ComponentProvider(),
+    new DataBindProvider(),
+    new VirtualProvider(),
+    new AttrProvider()
+  ]
+});
+
+options.bindingProviderInstance = provider;
+
+provider.bindingHandlers.set(bindings);
+provider.bindingHandlers.set(bindings$1);
+provider.bindingHandlers.set(bindings$2);
+provider.bindingHandlers.set(bindings$3);
+provider.bindingHandlers.set({ each: bindings$3.foreach });
+provider.bindingHandlers.set(bindings$4);
+
+Object.assign(options.filters, filters);
+
+// Expose the API.
+var index = {
+    // --- Top-level ---
+  version: '4.0.0-alpha4',
+  options: options,
+
+  extenders: extenders,
+  filters: options.filters,
+  Component: index$1.ComponentABC,
+
+    // --- Utilities ---
+  cleanNode: cleanNode,
+  memoization: memoization,
+  removeNode: removeNode,
+  tasks: tasks,
+  utils: coreUtils,
+  dependencyDetection,
+  ignoreDependencies: dependencyDetection.ignore,
+
+    // -- Observable ---
+  isObservable,
+  isSubscribable,
+  isWriteableObservable,
+  isWritableObservable: isWriteableObservable,
+  observable,
+  observableArray,
+  peek,
+  subscribable,
+  unwrap,
+  toJS,
+  toJSON,
+
+    // ... Computed ...
+  computed,
+  isComputed,
+  isPureComputed,
+  pureComputed,
+
+    // --- Templates ---
+  nativeTemplateEngine,
+  renderTemplate,
+  setTemplateEngine,
+  templateEngine,
+  templateSources: { domElement, anonymousTemplate },
+
+    // --- Binding ---
+  applyBindingAccessorsToNode,
+  applyBindings,
+  applyBindingsToDescendants,
+  applyBindingsToNode,
+  bindingHandlers: provider.bindingHandlers,
+  bindingProvider: provider,
+  contextFor,
+  dataFor,
+  getBindingHandler,
+  BindingHandler,
+  AsyncBindingHandler,
+  virtualElements: virtualElements,
+  domNodeDisposal: coreUtils.domNodeDisposal,
+
+    // --- Components ---
+  components: index$1
+};
+
+return index;
+
+})));
+//# sourceMappingURL=tko.es6.js.map
diff --git a/packages/tko/dist/tko.es6.js.map b/packages/tko/dist/tko.es6.js.map
new file mode 100644
index 00000000..d15d6b7b
--- /dev/null
+++ b/packages/tko/dist/tko.es6.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"tko.es6.js","sources":["../../tko.utils/dist/tko.utils.es6.js","../../tko.observable/dist/tko.observable.es6.js","../../tko.computed/dist/tko.computed.es6.js","../../tko.utils.parser/dist/tko.utils.parser.es6.js","../../tko.provider/dist/tko.provider.es6.js","../../tko.provider.bindingString/dist/tko.provider.bindingString.es6.js","../../tko.provider.virtual/dist/tko.provider.virtual.es6.js","../../tko.provider.databind/dist/tko.provider.databind.es6.js","../../tko.lifecycle/dist/tko.lifecycle.es6.js","../../tko.utils.component/dist/tko.utils.component.es6.js","../../tko.provider.component/dist/tko.provider.component.es6.js","../../tko.provider.attr/dist/tko.provider.attr.es6.js","../../tko.provider.multi/dist/tko.provider.multi.es6.js","../../tko.provider.mustache/dist/tko.provider.mustache.es6.js","../../tko.bind/dist/tko.bind.es6.js","../../tko.binding.core/dist/tko.binding.core.es6.js","../../tko.binding.template/dist/tko.binding.template.es6.js","../../tko.binding.if/dist/tko.binding.if.es6.js","../../tko.binding.foreach/dist/tko.binding.foreach.es6.js","../../tko.filter.punches/dist/tko.filter.punches.es6.js","../../tko.binding.component/dist/tko.binding.component.es6.js","../src/index.js"],"sourcesContent":["//\n// Array utilities\n//\n/* eslint no-cond-assign: 0 */\n\nfunction arrayForEach(array, action) {\n    for (var i = 0, j = array.length; i < j; i++)\n        action(array[i], i);\n}\n\nfunction arrayIndexOf(array, item) {\n    // IE9\n    if (typeof Array.prototype.indexOf == \"function\")\n        return Array.prototype.indexOf.call(array, item);\n    for (var i = 0, j = array.length; i < j; i++)\n        if (array[i] === item)\n            return i;\n    return -1;\n}\n\nfunction arrayFirst(array, predicate, predicateOwner) {\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate.call(predicateOwner, array[i], i))\n            return array[i];\n    return null;\n}\n\nfunction arrayRemoveItem(array, itemToRemove) {\n    var index = arrayIndexOf(array, itemToRemove);\n    if (index > 0) {\n        array.splice(index, 1);\n    }\n    else if (index === 0) {\n        array.shift();\n    }\n}\n\nfunction arrayGetDistinctValues(array) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++) {\n        if (arrayIndexOf(result, array[i]) < 0)\n            result.push(array[i]);\n    }\n    return result;\n}\n\nfunction arrayMap(array, mapping) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        result.push(mapping(array[i], i));\n    return result;\n}\n\nfunction arrayFilter(array, predicate) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate(array[i], i))\n            result.push(array[i]);\n    return result;\n}\n\nfunction arrayPushAll(array, valuesToPush) {\n    if (valuesToPush instanceof Array)\n        array.push.apply(array, valuesToPush);\n    else\n        for (var i = 0, j = valuesToPush.length; i < j; i++)\n            array.push(valuesToPush[i]);\n    return array;\n}\n\nfunction addOrRemoveItem(array, value, included) {\n    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);\n    if (existingEntryIndex < 0) {\n        if (included)\n            array.push(value);\n    } else {\n        if (!included)\n            array.splice(existingEntryIndex, 1);\n    }\n}\n\n\nfunction makeArray(arrayLikeObject) {\n    var result = [];\n    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {\n        result.push(arrayLikeObject[i]);\n    }\n    return result;\n}\n\n\nfunction range(min, max) {\n    min = typeof min === 'function' ? min() : min;\n    max = typeof max === 'function' ? max() : max;\n    var result = [];\n    for (var i = min; i <= max; i++)\n        result.push(i);\n    return result;\n}\n\n// Go through the items that have been added and deleted and try to find matches between them.\nfunction findMovesInArrayComparison(left, right, limitFailedCompares) {\n    if (left.length && right.length) {\n        var failedCompares, l, r, leftItem, rightItem;\n        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {\n            for (r = 0; rightItem = right[r]; ++r) {\n                if (leftItem['value'] === rightItem['value']) {\n                    leftItem['moved'] = rightItem['index'];\n                    rightItem['moved'] = leftItem['index'];\n                    right.splice(r, 1);         // This item is marked as moved; so remove it from right list\n                    failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures\n                    break;\n                }\n            }\n            failedCompares += r;\n        }\n    }\n}\n\n\n\nvar statusNotInOld = 'added';\nvar statusNotInNew = 'deleted';\n\n    // Simple calculation based on Levenshtein distance.\nfunction compareArrays(oldArray, newArray, options) {\n    // For backward compatibility, if the third arg is actually a bool, interpret\n    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.\n    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});\n    oldArray = oldArray || [];\n    newArray = newArray || [];\n\n    if (oldArray.length < newArray.length)\n        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);\n    else\n        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);\n}\n\n\nfunction compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {\n    var myMin = Math.min,\n        myMax = Math.max,\n        editDistanceMatrix = [],\n        smlIndex, smlIndexMax = smlArray.length,\n        bigIndex, bigIndexMax = bigArray.length,\n        compareRange = (bigIndexMax - smlIndexMax) || 1,\n        maxDistance = smlIndexMax + bigIndexMax + 1,\n        thisRow, lastRow,\n        bigIndexMaxForRow, bigIndexMinForRow;\n\n    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {\n        lastRow = thisRow;\n        editDistanceMatrix.push(thisRow = []);\n        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);\n        bigIndexMinForRow = myMax(0, smlIndex - 1);\n        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {\n            if (!bigIndex)\n                thisRow[bigIndex] = smlIndex + 1;\n            else if (!smlIndex)  // Top row - transform empty array into new array via additions\n                thisRow[bigIndex] = bigIndex + 1;\n            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])\n                thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)\n            else {\n                var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)\n                var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)\n                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;\n            }\n        }\n    }\n\n    var editScript = [], meMinusOne, notInSml = [], notInBig = [];\n    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {\n        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;\n        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {\n            notInSml.push(editScript[editScript.length] = {     // added\n                'status': statusNotInSml,\n                'value': bigArray[--bigIndex],\n                'index': bigIndex });\n        } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {\n            notInBig.push(editScript[editScript.length] = {     // deleted\n                'status': statusNotInBig,\n                'value': smlArray[--smlIndex],\n                'index': smlIndex });\n        } else {\n            --bigIndex;\n            --smlIndex;\n            if (!options['sparse']) {\n                editScript.push({\n                    'status': \"retained\",\n                    'value': bigArray[bigIndex] });\n            }\n        }\n    }\n\n    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of\n    // smlIndexMax keeps the time complexity of this algorithm linear.\n    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);\n\n    return editScript.reverse();\n}\n\n//\n// This becomes ko.options\n// --\n//\n// This is the root 'options', which must be extended by others.\n\nvar _global;\n\ntry { _global = window; } catch (e) { _global = global; }\n\nvar options = {\n  deferUpdates: false,\n\n  useOnlyNativeEvents: false,\n\n  protoProperty: '__ko_proto__',\n\n    // Modify the default attribute from `data-bind`.\n  defaultBindingAttribute: 'data-bind',\n\n    // Enable/disable <!-- ko binding: ... -> style bindings\n  allowVirtualElements: true,\n\n    // Global variables that can be accessed from bindings.\n  bindingGlobals: _global,\n\n    // An instance of the binding provider.\n  bindingProviderInstance: null,\n\n    // jQuery will be automatically set to _global.jQuery in applyBindings\n    // if it is (strictly equal to) undefined.  Set it to false or null to\n    // disable automatically setting jQuery.\n  jQuery: _global && _global.jQuery,\n\n  Promise: _global && _global.Promise,\n\n  taskScheduler: null,\n\n  debug: false,\n\n  global: _global,\n  document: _global.document,\n\n    // Filters for bindings\n    //   data-bind=\"expression | filter_1 | filter_2\"\n  filters: {},\n\n  onError: function (e) { throw e },\n\n  set: function (name, value) {\n    options[name] = value;\n  }\n};\n\nObject.defineProperty(options, '$', {\n  get: function () { return options.jQuery }\n});\n\n//\n// Error handling\n// ---\n//\n// The default onError handler is to re-throw.\nfunction catchFunctionErrors(delegate) {\n    return options.onError ? function () {\n        try {\n            return delegate.apply(this, arguments);\n        } catch (e) {\n            options.onError(e);\n        }\n    } : delegate;\n}\n\nfunction deferError(error) {\n    safeSetTimeout(function () { options.onError(error); }, 0);\n}\n\n\nfunction safeSetTimeout(handler, timeout) {\n    return setTimeout(catchFunctionErrors(handler), timeout);\n}\n\n//\n// Asynchronous functionality\n// ---\nfunction throttle(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        if (!timeoutInstance) {\n            timeoutInstance = safeSetTimeout(function () {\n                timeoutInstance = undefined;\n                callback();\n            }, timeout);\n        }\n    };\n}\n\nfunction debounce(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        clearTimeout(timeoutInstance);\n        timeoutInstance = safeSetTimeout(callback, timeout);\n    };\n}\n\n//\n// Detection and Workarounds for Internet Explorer\n//\n// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)\n// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.\n// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.\n// If there is a future need to detect specific versions of IE10+, we will amend this.\nvar ieVersion = options.document && (function () {\n  var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');\n\n    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment\n  while (\n        div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',\n        iElems[0]\n    ) {}\n  return version > 4 ? version : undefined\n}());\n\nvar isIe6 = ieVersion === 6;\nvar isIe7 = ieVersion === 7;\n\n//\n// Object functions\n//\n\nfunction extend(target, source) {\n    if (source) {\n        for(var prop in source) {\n            if(source.hasOwnProperty(prop)) {\n                target[prop] = source[prop];\n            }\n        }\n    }\n    return target;\n}\n\nfunction objectForEach(obj, action) {\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            action(prop, obj[prop]);\n        }\n    }\n}\n\n\nfunction objectMap(source, mapping) {\n    if (!source)\n        return source;\n    var target = {};\n    for (var prop in source) {\n        if (source.hasOwnProperty(prop)) {\n            target[prop] = mapping(source[prop], prop, source);\n        }\n    }\n    return target;\n}\n\n\nfunction getObjectOwnProperty(obj, propName) {\n    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;\n}\n\n\nfunction clonePlainObjectDeep(obj, seen) {\n    if (!seen) { seen = []; }\n\n    if (!obj || typeof obj !== 'object'\n        || obj.constructor !== Object\n        || seen.indexOf(obj) !== -1) {\n        return obj;\n    }\n\n    // Anything that makes it below is a plain object that has not yet\n    // been seen/cloned.\n    seen.push(obj);\n\n    var result = {};\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            result[prop] = clonePlainObjectDeep(obj[prop], seen);\n        }\n    }\n    return result;\n}\n\n//\n// Prototype Functions\n//\nvar protoProperty = options.protoProperty;\n\nvar canSetPrototype = ({ __proto__: [] } instanceof Array);\n\nfunction setPrototypeOf(obj, proto) {\n    obj.__proto__ = proto;\n    return obj;\n}\n\nvar setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;\n\nfunction hasPrototype(instance, prototype) {\n    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;\n    if (instance[protoProperty] === prototype) return true;\n    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain\n}\n\n//\n// String (and JSON)\n//\n\n\nfunction stringTrim (string) {\n    return string === null || string === undefined ? '' :\n        string.trim ?\n            string.trim() :\n            string.toString().replace(/^[\\s\\xa0]+|[\\s\\xa0]+$/g, '');\n}\n\n\nfunction stringStartsWith (string, startsWith) {\n    string = string || \"\";\n    if (startsWith.length > string.length)\n        return false;\n    return string.substring(0, startsWith.length) === startsWith;\n}\n\n\nfunction parseJson (jsonString) {\n    if (typeof jsonString == \"string\") {\n        jsonString = stringTrim(jsonString);\n        if (jsonString) {\n            if (JSON && JSON.parse) // Use native parsing where available\n                return JSON.parse(jsonString);\n            return (new Function(\"return \" + jsonString))(); // Fallback on less safe parsing for older browsers\n        }\n    }\n    return null;\n}\n\n\nfunction stringifyJson (data, replacer, space) {   // replacer and space are optional\n    if (!JSON || !JSON.stringify)\n        throw new Error(\"Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js\");\n    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);\n}\n\n//\n// ES6 Symbols\n//\n\nvar useSymbols = typeof Symbol === 'function';\n\nfunction createSymbolOrString(identifier) {\n    return useSymbols ? Symbol(identifier) : identifier;\n}\n\n//\n// DOM - CSS\n//\n\n// For details on the pattern for changing node classes\n// see: https://github.com/knockout/knockout/issues/1597\nvar cssClassNameRegex = /\\S+/g;\n\n\nfunction toggleDomNodeCssClass(node, classNames, shouldHaveClass) {\n    var addOrRemoveFn;\n    if (!classNames) { return; }\n    if (typeof node.classList === 'object') {\n        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];\n        arrayForEach(classNames.match(cssClassNameRegex), function(className) {\n            addOrRemoveFn.call(node.classList, className);\n        });\n    } else if (typeof node.className['baseVal'] === 'string') {\n        // SVG tag .classNames is an SVGAnimatedString instance\n        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);\n    } else {\n        // node.className ought to be a string.\n        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);\n    }\n}\n\n\nfunction toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {\n    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.\n    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];\n    arrayForEach(classNames.match(cssClassNameRegex), function(className) {\n        addOrRemoveItem(currentClassNames, className, shouldHaveClass);\n    });\n    obj[prop] = currentClassNames.join(\" \");\n}\n\n//\n// jQuery\n//\n// TODO: deprecate in favour of options.$\n\nvar jQueryInstance = options.global && options.global.jQuery;\n\nfunction jQuerySetInstance(jquery) {\n    options.jQuery = jQueryInstance = jquery;\n}\n\n//\n// Information about the DOM\n//\nfunction domNodeIsContainedBy (node, containedByNode) {\n    if (node === containedByNode)\n        return true;\n    if (node.nodeType === 11)\n        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8\n    if (containedByNode.contains)\n        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);\n    if (containedByNode.compareDocumentPosition)\n        return (containedByNode.compareDocumentPosition(node) & 16) == 16;\n    while (node && node != containedByNode) {\n        node = node.parentNode;\n    }\n    return !!node;\n}\n\nfunction domNodeIsAttachedToDocument (node) {\n    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);\n}\n\nfunction anyDomNodeIsAttachedToDocument(nodes) {\n    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);\n}\n\nfunction tagNameLower(element) {\n    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.\n    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),\n    // we don't need to do the .toLowerCase() as it will always be lower case anyway.\n    return element && element.tagName && element.tagName.toLowerCase();\n}\n\nfunction isDomElement(obj) {\n    if (window.HTMLElement) {\n        return obj instanceof HTMLElement;\n    } else {\n        return obj && obj.tagName && obj.nodeType === 1;\n    }\n}\n\nfunction isDocumentFragment(obj) {\n    if (window.DocumentFragment) {\n        return obj instanceof DocumentFragment;\n    } else {\n        return obj && obj.nodeType === 11;\n    }\n}\n\n//\n// DOM node data\n//\n//\nvar dataStoreKeyExpandoPropertyName = \"__ko__data\" + new Date();\nvar dataStore;\nvar uniqueId = 0;\nvar get;\nvar set;\nvar clear;\n\n/**\n * --- Legacy getter/setter (may cause memory leaks) ---\n */\nfunction getAll(node, createIfNotFound) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== \"null\") && dataStore[dataStoreKey];\n    if (!hasExistingDataStore) {\n        if (!createIfNotFound)\n            return undefined;\n        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = \"ko\" + uniqueId++;\n        dataStore[dataStoreKey] = {};\n    }\n    return dataStore[dataStoreKey];\n}\n\nfunction legacyGet(node, key) {\n    var allDataForNode = getAll(node, false);\n    return allDataForNode === undefined ? undefined : allDataForNode[key];\n}\n\nfunction legacySet(node, key, value) {\n    if (value === undefined) {\n        // Make sure we don't actually create a new domData key if we are actually deleting a value\n        if (getAll(node, false) === undefined)\n            return;\n    }\n    var allDataForNode = getAll(node, true);\n    allDataForNode[key] = value;\n}\n\nfunction legacyClear(node) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    if (dataStoreKey) {\n        delete dataStore[dataStoreKey];\n        node[dataStoreKeyExpandoPropertyName] = null;\n        return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\n    }\n    return false;\n}\n\n/**\n * WeakMap get/set/clear\n */\n\nfunction wmGet(node, key) {\n    return (dataStore.get(node) || {})[key];\n}\n\nfunction wmSet(node, key, value) {\n    var dataForNode;\n    if (dataStore.has(node)) {\n        dataForNode = dataStore.get(node);\n    } else {\n        dataForNode = {};\n        dataStore.set(node, dataForNode);\n    }\n    dataForNode[key] = value;\n}\n\nfunction wmClear (node) {\n  return dataStore.delete(node)\n}\n\n\nif ('WeakMap' in options.global) {\n    dataStore = new WeakMap();\n    get = wmGet;\n    set = wmSet;\n    clear = wmClear;\n} else {\n    dataStore = {};\n    get = legacyGet;\n    set = legacySet;\n    clear = legacyClear;\n}\n\n\n\n/**\n * Create a unique key-string identifier.\n * FIXME: This should be deprecated.\n */\nfunction nextKey() {\n    return (uniqueId++) + dataStoreKeyExpandoPropertyName;\n}\n\n\n\n\n\nvar data = Object.freeze({\n\tnextKey: nextKey,\n\tget get () { return get; },\n\tget set () { return set; },\n\tget clear () { return clear; }\n});\n\n//\n// DOM node disposal\n//\n/* eslint no-cond-assign: 0 */\nvar domDataKey = nextKey();\n// Node types:\n// 1: Element\n// 8: Comment\n// 9: Document\nvar cleanableNodeTypes = { 1: true, 8: true, 9: true };\nvar cleanableNodeTypesWithDescendants = { 1: true, 9: true };\n\nfunction getDisposeCallbacksCollection(node, createIfNotFound) {\n    var allDisposeCallbacks = get(node, domDataKey);\n    if ((allDisposeCallbacks === undefined) && createIfNotFound) {\n        allDisposeCallbacks = [];\n        set(node, domDataKey, allDisposeCallbacks);\n    }\n    return allDisposeCallbacks;\n}\nfunction destroyCallbacksCollection(node) {\n    set(node, domDataKey, undefined);\n}\n\nfunction cleanSingleNode(node) {\n    // Run all the dispose callbacks\n    var callbacks = getDisposeCallbacksCollection(node, false);\n    if (callbacks) {\n        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)\n        for (var i = 0; i < callbacks.length; i++)\n            callbacks[i](node);\n    }\n\n    // Erase the DOM data\n    clear(node);\n\n    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)\n    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {\n        otherNodeCleanerFunctions[i](node);\n    }\n\n    // Clear any immediate-child comment nodes, as these wouldn't have been found by\n    // node.getElementsByTagName(\"*\") in cleanNode() (comment nodes aren't elements)\n    if (cleanableNodeTypesWithDescendants[node.nodeType])\n        cleanImmediateCommentTypeChildren(node);\n}\n\nfunction cleanImmediateCommentTypeChildren(nodeWithChildren) {\n    var child, nextChild = nodeWithChildren.firstChild;\n    while (child = nextChild) {\n        nextChild = child.nextSibling;\n        if (child.nodeType === 8)\n            cleanSingleNode(child);\n    }\n}\n\n// Exports\nfunction addDisposeCallback(node, callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"Callback must be a function\");\n    getDisposeCallbacksCollection(node, true).push(callback);\n}\n\nfunction removeDisposeCallback(node, callback) {\n    var callbacksCollection = getDisposeCallbacksCollection(node, false);\n    if (callbacksCollection) {\n        arrayRemoveItem(callbacksCollection, callback);\n        if (callbacksCollection.length == 0)\n            destroyCallbacksCollection(node);\n    }\n}\n\nfunction cleanNode(node) {\n    // First clean this node, where applicable\n    if (cleanableNodeTypes[node.nodeType]) {\n        cleanSingleNode(node);\n\n        // ... then its descendants, where applicable\n        if (cleanableNodeTypesWithDescendants[node.nodeType]) {\n            // Clone the descendants list in case it changes during iteration\n            var descendants = [];\n            arrayPushAll(descendants, node.getElementsByTagName(\"*\"));\n            for (var i = 0, j = descendants.length; i < j; i++)\n                cleanSingleNode(descendants[i]);\n        }\n    }\n    return node;\n}\n\nfunction removeNode(node) {\n    cleanNode(node);\n    if (node.parentNode)\n        node.parentNode.removeChild(node);\n}\n\n\n// Expose supplemental node cleaning functions.\nvar otherNodeCleanerFunctions = [];\n\n\n// Special support for jQuery here because it's so commonly used.\n// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData\n// so notify it to tear down any resources associated with the node & descendants here.\nfunction cleanjQueryData(node) {\n    var jQueryCleanNodeFn = jQueryInstance\n        ? jQueryInstance.cleanData : null;\n\n    if (jQueryCleanNodeFn) {\n        jQueryCleanNodeFn([node]);\n    }\n}\n\n\notherNodeCleanerFunctions.push(cleanjQueryData);\n\n//\n// DOM Events\n//\n\n// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)\nvar knownEvents = {};\nvar knownEventTypesByEventName = {};\n\nvar keyEventTypeName = (options.global.navigator && /Firefox\\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';\n\nknownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];\n\nknownEvents['MouseEvents'] = [\n    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',\n    'mouseout', 'mouseenter', 'mouseleave'];\n\n\nobjectForEach(knownEvents, function(eventType, knownEventsForType) {\n    if (knownEventsForType.length) {\n        for (var i = 0, j = knownEventsForType.length; i < j; i++)\n            knownEventTypesByEventName[knownEventsForType[i]] = eventType;\n    }\n});\n\n\nfunction isClickOnCheckableElement(element, eventType) {\n    if ((tagNameLower(element) !== \"input\") || !element.type) return false;\n    if (eventType.toLowerCase() != \"click\") return false;\n    var inputType = element.type;\n    return (inputType == \"checkbox\") || (inputType == \"radio\");\n}\n\n\n// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406\nvar eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };\n\nfunction registerEventHandler(element, eventType, handler) {\n    var wrappedHandler = catchFunctionErrors(handler);\n\n    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];\n    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {\n        jQueryInstance(element).bind(eventType, wrappedHandler);\n    } else if (!mustUseAttachEvent && typeof element.addEventListener == \"function\")\n        element.addEventListener(eventType, wrappedHandler, false);\n    else if (typeof element.attachEvent !== \"undefined\") {\n        var attachEventHandler = function (event) { wrappedHandler.call(element, event); },\n            attachEventName = \"on\" + eventType;\n        element.attachEvent(attachEventName, attachEventHandler);\n\n        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)\n        // so to avoid leaks, we have to remove them manually. See bug #856\n        addDisposeCallback(element, function() {\n            element.detachEvent(attachEventName, attachEventHandler);\n        });\n    } else\n        throw new Error(\"Browser doesn't support addEventListener or attachEvent\");\n}\n\nfunction triggerEvent(element, eventType) {\n    if (!(element && element.nodeType))\n        throw new Error(\"element must be a DOM node when calling triggerEvent\");\n\n    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the\n    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)\n    // IE doesn't change the checked state when you trigger the click event using \"fireEvent\".\n    // In both cases, we'll use the click method instead.\n    var useClickWorkaround = isClickOnCheckableElement(element, eventType);\n\n    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {\n        jQueryInstance(element).trigger(eventType);\n    } else if (typeof document.createEvent == \"function\") {\n        if (typeof element.dispatchEvent == \"function\") {\n            var eventCategory = knownEventTypesByEventName[eventType] || \"HTMLEvents\";\n            var event = document.createEvent(eventCategory);\n            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);\n            element.dispatchEvent(event);\n        }\n        else\n            throw new Error(\"The supplied element doesn't support dispatchEvent\");\n    } else if (useClickWorkaround && element.click) {\n        element.click();\n    } else if (typeof element.fireEvent != \"undefined\") {\n        element.fireEvent(\"on\" + eventType);\n    } else {\n        throw new Error(\"Browser doesn't support triggering events\");\n    }\n}\n\n//\n//  DOM node manipulation\n//\nfunction fixUpContinuousNodeArray(continuousNodeArray, parentNode) {\n    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile\n    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that\n    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been\n    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.\n    // So, this function translates the old \"map\" output array into its best guess of the set of current DOM nodes.\n    //\n    // Rules:\n    //   [A] Any leading nodes that have been removed should be ignored\n    //       These most likely correspond to memoization nodes that were already removed during binding\n    //       See https://github.com/knockout/knockout/pull/440\n    //   [B] Any trailing nodes that have been remove should be ignored\n    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]\n    //       See https://github.com/knockout/knockout/pull/1903\n    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,\n    //       and include any nodes that have been inserted among the previous collection\n\n    if (continuousNodeArray.length) {\n        // The parent node can be a virtual element; so get the real parent node\n        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;\n\n        // Rule [A]\n        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)\n            continuousNodeArray.splice(0, 1);\n\n        // Rule [B]\n        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)\n            continuousNodeArray.length--;\n\n        // Rule [C]\n        if (continuousNodeArray.length > 1) {\n            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];\n            // Replace with the actual new continuous node set\n            continuousNodeArray.length = 0;\n            while (current !== last) {\n                continuousNodeArray.push(current);\n                current = current.nextSibling;\n            }\n            continuousNodeArray.push(last);\n        }\n    }\n    return continuousNodeArray;\n}\n\nfunction setOptionNodeSelectionState (optionNode, isSelected) {\n    // IE6 sometimes throws \"unknown error\" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.\n    if (ieVersion < 7)\n        optionNode.setAttribute(\"selected\", isSelected);\n    else\n        optionNode.selected = isSelected;\n}\n\n\nfunction forceRefresh(node) {\n    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209\n    if (ieVersion >= 9) {\n        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container\n        var elem = node.nodeType == 1 ? node : node.parentNode;\n        if (elem.style)\n            elem.style.zoom = elem.style.zoom;\n    }\n}\n\nfunction ensureSelectElementIsRenderedCorrectly(selectElement) {\n    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.\n    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)\n    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)\n    if (ieVersion) {\n        var originalWidth = selectElement.style.width;\n        selectElement.style.width = 0;\n        selectElement.style.width = originalWidth;\n    }\n}\n\n/* eslint no-cond-assign: 0 */\n//\n// Virtual Elements\n//\n//\n// \"Virtual elements\" is an abstraction on top of the usual DOM API which understands the notion that comment nodes\n// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).\n// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state\n// of that virtual hierarchy\n//\n// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)\n// without having to scatter special cases all over the binding and templating code.\n\n// IE 9 cannot reliably read the \"nodeValue\" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)\n// but it does give them a nonstandard alternative property called \"text\" that it can read reliably. Other browsers don't have that property.\n// So, use node.text where available, and node.nodeValue elsewhere\nvar commentNodesHaveTextProperty = options.document && options.document.createComment(\"test\").text === \"<!--test-->\";\n\nvar startCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*ko(?:\\s+([\\s\\S]+))?\\s*-->$/ : /^\\s*ko(?:\\s+([\\s\\S]+))?\\s*$/;\nvar endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\\s*\\/ko\\s*-->$/ : /^\\s*\\/ko\\s*$/;\nvar htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };\n\nfunction isStartComment(node) {\n    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\n\nfunction isEndComment(node) {\n    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\n\nfunction getVirtualChildren(startComment, allowUnbalanced) {\n    var currentNode = startComment;\n    var depth = 1;\n    var children = [];\n    while (currentNode = currentNode.nextSibling) {\n        if (isEndComment(currentNode)) {\n            depth--;\n            if (depth === 0)\n                return children;\n        }\n\n        children.push(currentNode);\n\n        if (isStartComment(currentNode))\n            depth++;\n    }\n    if (!allowUnbalanced)\n        throw new Error(\"Cannot find closing comment tag to match: \" + startComment.nodeValue);\n    return null;\n}\n\nfunction getMatchingEndComment(startComment, allowUnbalanced) {\n    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);\n    if (allVirtualChildren) {\n        if (allVirtualChildren.length > 0)\n            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;\n        return startComment.nextSibling;\n    } else\n        return null; // Must have no matching end comment, and allowUnbalanced is true\n}\n\nfunction getUnbalancedChildTags(node) {\n    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>\n    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->\n    var childNode = node.firstChild, captureRemaining = null;\n    if (childNode) {\n        do {\n            if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes\n                captureRemaining.push(childNode);\n            else if (isStartComment(childNode)) {\n                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);\n                if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set\n                    childNode = matchingEndComment;\n                else\n                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point\n            } else if (isEndComment(childNode)) {\n                captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n    return captureRemaining;\n}\n\nvar allowedBindings = {};\nvar hasBindingValue = isStartComment;\n\nfunction childNodes(node) {\n    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;\n}\n\nfunction emptyNode(node) {\n    if (!isStartComment(node))\n        emptyDomNode(node);\n    else {\n        var virtualChildren = childNodes(node);\n        for (var i = 0, j = virtualChildren.length; i < j; i++)\n            removeNode(virtualChildren[i]);\n    }\n}\n\nfunction setDomNodeChildren$1(node, childNodes) {\n    if (!isStartComment(node))\n        setDomNodeChildren(node, childNodes);\n    else {\n        emptyNode(node);\n        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children\n        for (var i = 0, j = childNodes.length; i < j; i++)\n            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);\n    }\n}\n\nfunction prepend(containerNode, nodeToPrepend) {\n    if (!isStartComment(containerNode)) {\n        if (containerNode.firstChild)\n            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);\n        else\n            containerNode.appendChild(nodeToPrepend);\n    } else {\n        // Start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);\n    }\n}\n\nfunction insertAfter(containerNode, nodeToInsert, insertAfterNode) {\n    if (!insertAfterNode) {\n        prepend(containerNode, nodeToInsert);\n    } else if (!isStartComment(containerNode)) {\n        // Insert after insertion point\n        if (insertAfterNode.nextSibling)\n            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n        else\n            containerNode.appendChild(nodeToInsert);\n    } else {\n        // Children of start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n    }\n}\n\nfunction firstChild(node) {\n    if (!isStartComment(node)) {\n        return node.firstChild;\n    }\n    if (!node.nextSibling || isEndComment(node.nextSibling)) {\n        return null;\n    }\n    return node.nextSibling;\n}\n\n\nfunction lastChild(node) {\n    var nextChild = firstChild(node),\n        lastChildNode;\n\n    do {\n        lastChildNode = nextChild;\n    } while (nextChild = nextSibling(nextChild));\n\n    return lastChildNode;\n}\n\nfunction nextSibling(node) {\n    if (isStartComment(node))\n        node = getMatchingEndComment(node);\n    if (node.nextSibling && isEndComment(node.nextSibling))\n        return null;\n    return node.nextSibling;\n}\n\nfunction previousSibling(node) {\n    var depth = 0;\n    do {\n        if (node.nodeType === 8) {\n            if (isStartComment(node)) {\n                if (--depth === 0) {\n                    return node;\n                }\n            } else if (isEndComment(node)) {\n                depth++;\n            }\n        } else {\n            if (depth === 0) { return node; }\n        }\n    } while (node = node.previousSibling);\n    return;\n}\n\nfunction virtualNodeBindingValue(node) {\n    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);\n    return regexMatch ? regexMatch[1] : null;\n}\n\nfunction normaliseVirtualElementDomStructure(elementVerified) {\n    // Workaround for https://github.com/SteveSanderson/knockout/issues/155\n    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes\n    // that are direct descendants of <ul> into the preceding <li>)\n    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])\n        return;\n\n    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags\n    // must be intended to appear *after* that child, so move them there.\n    var childNode = elementVerified.firstChild;\n    if (childNode) {\n        do {\n            if (childNode.nodeType === 1) {\n                var unbalancedTags = getUnbalancedChildTags(childNode);\n                if (unbalancedTags) {\n                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child\n                    var nodeToInsertBefore = childNode.nextSibling;\n                    for (var i = 0; i < unbalancedTags.length; i++) {\n                        if (nodeToInsertBefore)\n                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);\n                        else\n                            elementVerified.appendChild(unbalancedTags[i]);\n                    }\n                }\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n}\n\n\nvar virtualElements = Object.freeze({\n\tstartCommentRegex: startCommentRegex,\n\tendCommentRegex: endCommentRegex,\n\tisStartComment: isStartComment,\n\tisEndComment: isEndComment,\n\tgetVirtualChildren: getVirtualChildren,\n\tallowedBindings: allowedBindings,\n\thasBindingValue: hasBindingValue,\n\tchildNodes: childNodes,\n\temptyNode: emptyNode,\n\tsetDomNodeChildren: setDomNodeChildren$1,\n\tprepend: prepend,\n\tinsertAfter: insertAfter,\n\tfirstChild: firstChild,\n\tlastChild: lastChild,\n\tnextSibling: nextSibling,\n\tpreviousSibling: previousSibling,\n\tvirtualNodeBindingValue: virtualNodeBindingValue,\n\tnormaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure\n});\n\n//\n// DOM manipulation\n//\n/* eslint no-empty: 0 */\nfunction moveCleanedNodesToContainerElement(nodes) {\n    // Ensure it's a real array, as we're about to reparent the nodes and\n    // we don't want the underlying collection to change while we're doing that.\n    var nodesArray = makeArray(nodes);\n    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;\n\n    var container = templateDocument.createElement('div');\n    for (var i = 0, j = nodesArray.length; i < j; i++) {\n        container.appendChild(cleanNode(nodesArray[i]));\n    }\n    return container;\n}\n\nfunction cloneNodes (nodesArray, shouldCleanNodes) {\n    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {\n        var clonedNode = nodesArray[i].cloneNode(true);\n        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);\n    }\n    return newNodesArray;\n}\n\nfunction setDomNodeChildren (domNode, childNodes$$1) {\n    emptyDomNode(domNode);\n    if (childNodes$$1) {\n        for (var i = 0, j = childNodes$$1.length; i < j; i++)\n            domNode.appendChild(childNodes$$1[i]);\n    }\n}\n\nfunction replaceDomNodes (nodeToReplaceOrNodeArray, newNodesArray) {\n    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;\n    if (nodesToReplaceArray.length > 0) {\n        var insertionPoint = nodesToReplaceArray[0];\n        var parent = insertionPoint.parentNode;\n        for (var i = 0, j = newNodesArray.length; i < j; i++)\n            parent.insertBefore(newNodesArray[i], insertionPoint);\n        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {\n            removeNode(nodesToReplaceArray[i]);\n        }\n    }\n}\n\nfunction setElementName(element, name) {\n    element.name = name;\n\n    // Workaround IE 6/7 issue\n    // - https://github.com/SteveSanderson/knockout/issues/197\n    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/\n    if (ieVersion <= 7) {\n        try {\n            element.mergeAttributes(document.createElement(\"<input name='\" + element.name + \"'/>\"), false);\n        }\n        catch(e) {} // For IE9 with doc mode \"IE9 Standards\" and browser mode \"IE9 Compatibility View\"\n    }\n}\n\nfunction setTextContent(element, textContent) {\n    var value = typeof textContent === 'function' ? textContent() : textContent;\n    if ((value === null) || (value === undefined))\n        value = \"\";\n\n    // We need there to be exactly one child: a text node.\n    // If there are no children, more than one, or if it's not a text node,\n    // we'll clear everything and create a single text node.\n    var innerTextNode = firstChild(element);\n    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {\n        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);\n    } else {\n        innerTextNode.data = value;\n    }\n\n    forceRefresh(element);\n}\n\nfunction emptyDomNode (domNode) {\n    while (domNode.firstChild) {\n        removeNode(domNode.firstChild);\n    }\n}\n\n//\n// HTML-based manipulation\n//\nvar none = [0, \"\", \"\"];\nvar table = [1, \"<table>\", \"</table>\"];\nvar tbody = [2, \"<table><tbody>\", \"</tbody></table>\"];\nvar colgroup = [ 2, \"<table><tbody></tbody><colgroup>\", \"</colgroup></table>\"];\nvar tr = [3, \"<table><tbody><tr>\", \"</tr></tbody></table>\"];\nvar select = [1, \"<select multiple='multiple'>\", \"</select>\"];\nvar fieldset = [1, \"<fieldset>\", \"</fieldset>\"];\nvar map = [1, \"<map>\", \"</map>\"];\nvar object = [1, \"<object>\", \"</object>\"];\nvar lookup = {\n        'area': map,\n        'col': colgroup,\n        'colgroup': table,\n        'caption': table,\n        'legend': fieldset,\n        'thead': table,\n        'tbody': table,\n        'tfoot': table,\n        'tr': tbody,\n        'td': tr,\n        'th': tr,\n        'option': select,\n        'optgroup': select,\n        'param': object\n    };\nvar supportsTemplateTag = options.document && 'content' in options.document.createElement('template');\n\n\nfunction getWrap(tags) {\n    var m = tags.match(/^<([a-z]+)[ >]/);\n    return (m && lookup[m[1]]) || none;\n}\n\n\nfunction simpleHtmlParse(html, documentContext) {\n    documentContext || (documentContext = document);\n    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;\n\n    // Based on jQuery's \"clean\" function, but only accounting for table-related elements.\n    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's \"clean\" function directly\n\n    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of\n    // a descendant node. For example: \"<div><!-- mycomment -->abc</div>\" will get parsed as \"<div>abc</div>\"\n    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node\n    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.\n\n    // Trim whitespace, otherwise indexOf won't work as expected\n    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement(\"div\"),\n        wrap = getWrap(tags),\n        depth = wrap[0];\n\n    // Go to html and back, then peel off extra wrappers\n    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.\n    var markup = \"ignored<div>\" + wrap[1] + html + wrap[2] + \"</div>\";\n    if (typeof windowContext['innerShiv'] == \"function\") {\n        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding\n        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv\n        // somehow shims the native APIs so it just works anyway)\n        div.appendChild(windowContext['innerShiv'](markup));\n    } else {\n        div.innerHTML = markup;\n    }\n\n    // Move to the right depth\n    while (depth--)\n        div = div.lastChild;\n\n    return makeArray(div.lastChild.childNodes);\n}\n\n\nfunction templateHtmlParse(html, documentContext) {\n    if (!documentContext) { documentContext = document; }\n    var template = documentContext.createElement('template');\n    template.innerHTML = html;\n    return makeArray(template.content.childNodes);\n}\n\n\nfunction jQueryHtmlParse(html, documentContext) {\n    // jQuery's \"parseHTML\" function was introduced in jQuery 1.8.0 and is a documented public API.\n    if (jQueryInstance.parseHTML) {\n        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null\n    } else {\n        // For jQuery < 1.8.0, we fall back on the undocumented internal \"clean\" function.\n        var elems = jQueryInstance.clean([html], documentContext);\n\n        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.\n        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.\n        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.\n        if (elems && elems[0]) {\n            // Find the top-most parent element that's a direct child of a document fragment\n            var elem = elems[0];\n            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)\n                elem = elem.parentNode;\n            // ... then detach it\n            if (elem.parentNode)\n                elem.parentNode.removeChild(elem);\n        }\n\n        return elems;\n    }\n}\n\n\n/**\n * parseHtmlFragment converts a string into an array of DOM Nodes.\n * If supported, it uses <template>-tag parsing, falling back on\n * jQuery parsing (if jQuery is present), and finally on a\n * straightforward parser.\n *\n * @param  {string} html            To be parsed.\n * @param  {Object} documentContext That owns the executing code.\n * @return {[DOMNode]}              Parsed DOM Nodes\n */\nfunction parseHtmlFragment(html, documentContext) {\n    // Prefer <template>-tag based HTML parsing.\n    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :\n\n        // Benefit from jQuery's on old browsers, where possible\n        // NOTE: jQuery's HTML parsing fails on element names like tr-*.\n        // See: https://github.com/jquery/jquery/pull/1988\n        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :\n\n        // ... otherwise, this simple logic will do in most common cases.\n        simpleHtmlParse(html, documentContext));\n}\n\n\n/**\n  * setHtml empties the node's contents, unwraps the HTML, and\n  * sets the node's HTML using jQuery.html or parseHtmlFragment\n  *\n  * @param {DOMNode} node Node in which HTML needs to be set\n  * @param {DOMNode} html HTML to be inserted in node\n  * @returns undefined\n  */\nfunction setHtml(node, html) {\n    emptyDomNode(node);\n\n    // There's few cases where we would want to display a stringified\n    // function, so we unwrap it.\n    if (typeof html === 'function') {\n        html = html();\n    }\n\n    if ((html !== null) && (html !== undefined)) {\n        if (typeof html !== 'string')\n            html = html.toString();\n\n        // If the browser supports <template> tags, prefer that, as\n        // it obviates all the complex workarounds of jQuery.\n        //\n        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,\n        // for example <tr> elements which are not normally allowed to exist on their own.\n        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.\n        if (jQueryInstance && !supportsTemplateTag) {\n            jQueryInstance(node).html(html);\n        } else {\n            // ... otherwise, use KO's own parsing logic.\n            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);\n\n            if (node.nodeType === 8) {\n                if (html === null) {\n                    emptyNode(node);\n                } else {\n                    setDomNodeChildren$1(node, parsedNodes);\n                }\n            } else {\n                for (var i = 0; i < parsedNodes.length; i++)\n                    node.appendChild(parsedNodes[i]);\n            }\n        }\n    }\n}\n\n//\n// Memoization\n//\nvar memos = {};\n\nfunction randomMax8HexChars() {\n    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);\n}\n\nfunction generateRandomId() {\n    return randomMax8HexChars() + randomMax8HexChars();\n}\n\nfunction findMemoNodes(rootNode, appendToArray) {\n    if (!rootNode)\n        return;\n    if (rootNode.nodeType == 8) {\n        var memoId = parseMemoText(rootNode.nodeValue);\n        if (memoId != null)\n            appendToArray.push({ domNode: rootNode, memoId: memoId });\n    } else if (rootNode.nodeType == 1) {\n        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)\n            findMemoNodes(childNodes[i], appendToArray);\n    }\n}\n\n\nfunction memoize(callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"You can only pass a function to memoization.memoize()\");\n    var memoId = generateRandomId();\n    memos[memoId] = callback;\n    return \"<!--[ko_memo:\" + memoId + \"]-->\";\n}\n\nfunction unmemoize(memoId, callbackParams) {\n    var callback = memos[memoId];\n    if (callback === undefined)\n        throw new Error(\"Couldn't find any memo with ID \" + memoId + \". Perhaps it's already been unmemoized.\");\n    try {\n        callback.apply(null, callbackParams || []);\n        return true;\n    }\n    finally { delete memos[memoId]; }\n}\n\nfunction unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {\n    var memos = [];\n    findMemoNodes(domNode, memos);\n    for (var i = 0, j = memos.length; i < j; i++) {\n        var node = memos[i].domNode;\n        var combinedParams = [node];\n        if (extraCallbackParamsArray)\n            arrayPushAll(combinedParams, extraCallbackParamsArray);\n        unmemoize(memos[i].memoId, combinedParams);\n        node.nodeValue = \"\"; // Neuter this node so we don't try to unmemoize it again\n        if (node.parentNode)\n            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)\n    }\n}\n\nfunction parseMemoText(memoText) {\n    var match = memoText.match(/^\\[ko_memo\\:(.*?)\\]$/);\n    return match ? match[1] : null;\n}\n\n\nvar memoization = Object.freeze({\n\tmemoize: memoize,\n\tunmemoize: unmemoize,\n\tunmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,\n\tparseMemoText: parseMemoText\n});\n\n//\n//  Tasks Micro-scheduler\n//  ===\n//\n/* eslint no-cond-assign: 0 */\nvar taskQueue = [];\nvar taskQueueLength = 0;\nvar nextHandle = 1;\nvar nextIndexToProcess = 0;\nvar w = options.global;\n\nif (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {\n    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node\n    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT\n    options.taskScheduler = (function (callback) {\n        var div = w.document.createElement(\"div\");\n        new MutationObserver(callback).observe(div, {attributes: true});\n        return function () { div.classList.toggle(\"foo\"); };\n    })(scheduledProcess);\n} else if (w && w.document && \"onreadystatechange\" in w.document.createElement(\"script\")) {\n    // IE 6-10\n    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT\n    options.taskScheduler = function (callback) {\n        var script = document.createElement(\"script\");\n        script.onreadystatechange = function () {\n            script.onreadystatechange = null;\n            document.documentElement.removeChild(script);\n            script = null;\n            callback();\n        };\n        document.documentElement.appendChild(script);\n    };\n} else {\n    options.taskScheduler = function (callback) {\n        setTimeout(callback, 0);\n    };\n}\n\nfunction processTasks() {\n    if (taskQueueLength) {\n        // Each mark represents the end of a logical group of tasks and the number of these groups is\n        // limited to prevent unchecked recursion.\n        var mark = taskQueueLength, countMarks = 0;\n\n        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue\n        for (var task; nextIndexToProcess < taskQueueLength; ) {\n            if (task = taskQueue[nextIndexToProcess++]) {\n                if (nextIndexToProcess > mark) {\n                    if (++countMarks >= 5000) {\n                        nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion\n                        deferError(Error(\"'Too much recursion' after processing \" + countMarks + \" task groups.\"));\n                        break;\n                    }\n                    mark = taskQueueLength;\n                }\n                try {\n                    task();\n                } catch (ex) {\n                    deferError(ex);\n                }\n            }\n        }\n    }\n}\n\nfunction scheduledProcess() {\n    processTasks();\n\n    // Reset the queue\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n}\n\nfunction scheduleTaskProcessing() {\n    options.taskScheduler(scheduledProcess);\n}\n\n\nfunction schedule(func) {\n    if (!taskQueueLength) {\n        scheduleTaskProcessing();\n    }\n\n    taskQueue[taskQueueLength++] = func;\n    return nextHandle++;\n}\n\nfunction cancel(handle) {\n    var index = handle - (nextHandle - taskQueueLength);\n    if (index >= nextIndexToProcess && index < taskQueueLength) {\n        taskQueue[index] = null;\n    }\n}\n\n// For testing only: reset the queue and return the previous queue length\nfunction resetForTesting() {\n    var length = taskQueueLength - nextIndexToProcess;\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n    return length;\n}\n\n\n\n\nvar tasks = Object.freeze({\n\tschedule: schedule,\n\tcancel: cancel,\n\tresetForTesting: resetForTesting,\n\trunEarly: processTasks\n});\n\n/*\n  tko.util\n  ===\n\n\n*/\n\n// Sub-Modules;\n\nexport { tasks, virtualElements, data as domData, memoization, jQuerySetInstance, options, arrayForEach, arrayIndexOf, arrayFirst, arrayRemoveItem, arrayGetDistinctValues, arrayMap, arrayFilter, arrayPushAll, addOrRemoveItem, makeArray, range, findMovesInArrayComparison, compareArrays, throttle, debounce, catchFunctionErrors, deferError, safeSetTimeout, ieVersion, isIe6, isIe7, extend, objectForEach, objectMap, getObjectOwnProperty, clonePlainObjectDeep, canSetPrototype, setPrototypeOf, setPrototypeOfOrExtend, hasPrototype, stringTrim, stringStartsWith, parseJson, stringifyJson, useSymbols, createSymbolOrString, toggleDomNodeCssClass, registerEventHandler, triggerEvent, domNodeIsContainedBy, domNodeIsAttachedToDocument, anyDomNodeIsAttachedToDocument, tagNameLower, isDomElement, isDocumentFragment, moveCleanedNodesToContainerElement, cloneNodes, setDomNodeChildren, replaceDomNodes, setElementName, setTextContent, emptyDomNode, fixUpContinuousNodeArray, setOptionNodeSelectionState, forceRefresh, ensureSelectElementIsRenderedCorrectly, parseHtmlFragment, setHtml, addDisposeCallback, removeDisposeCallback, cleanNode, removeNode, otherNodeCleanerFunctions, cleanjQueryData };\n//# sourceMappingURL=tko.utils.es6.js.map\n","import { arrayForEach, arrayIndexOf, arrayRemoveItem, canSetPrototype, compareArrays, createSymbolOrString, debounce, extend, findMovesInArrayComparison, hasPrototype, objectForEach, options, setPrototypeOf, setPrototypeOfOrExtend, stringifyJson, tasks, throttle } from 'tko.utils';\n\n//\n//  Defer Updates\n//  ===\n//\nfunction deferUpdates(target) {\n    if (!target._deferUpdates) {\n        target._deferUpdates = true;\n        target.limit(function (callback) {\n            var handle;\n            return function () {\n                tasks.cancel(handle);\n                handle = tasks.schedule(callback);\n                target.notifySubscribers(undefined, 'dirty');\n            };\n        });\n    }\n}\n\n//\n// Observable extenders\n// ---\n//\nvar primitiveTypes = {\n  'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1\n};\n\nfunction valuesArePrimitiveAndEqual (a, b) {\n  var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);\n  return oldValueIsPrimitive ? (a === b) : false\n}\n\nfunction applyExtenders (requestedExtenders) {\n  var target = this;\n  if (requestedExtenders) {\n    objectForEach(requestedExtenders, function (key, value) {\n      var extenderHandler = extenders[key];\n      if (typeof extenderHandler === 'function') {\n        target = extenderHandler(target, value) || target;\n      } else {\n        options.onError(new Error('Extender not found: ' + key));\n      }\n    });\n  }\n  return target\n}\n\n/*\n                --- DEFAULT EXTENDERS ---\n */\n\n// Change when notifications are published.\nfunction notify (target, notifyWhen) {\n  target.equalityComparer = notifyWhen == 'always' ?\n        null :  // null equalityComparer means to always notify\n        valuesArePrimitiveAndEqual;\n}\n\nfunction deferred (target, option) {\n  if (option !== true) {\n    throw new Error('The \\'deferred\\' extender only accepts the value \\'true\\', because it is not supported to turn deferral off once enabled.')\n  }\n  deferUpdates(target);\n}\n\nfunction rateLimit (target, options$$1) {\n  var timeout, method, limitFunction;\n\n  if (typeof options$$1 === 'number') {\n    timeout = options$$1;\n  } else {\n    timeout = options$$1.timeout;\n    method = options$$1.method;\n  }\n\n    // rateLimit supersedes deferred updates\n  target._deferUpdates = false;\n\n  limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;\n\n  target.limit(function (callback) {\n    return limitFunction(callback, timeout)\n  });\n}\n\nvar extenders = {\n  notify: notify,\n  deferred: deferred,\n  rateLimit: rateLimit\n};\n\n/* eslint no-cond-assign: 0 */\nfunction subscription (target, callback, disposeCallback) {\n  this._target = target;\n  this.callback = callback;\n  this.disposeCallback = disposeCallback;\n  this.isDisposed = false;\n}\n\nsubscription.prototype.dispose = function () {\n  this.isDisposed = true;\n  this.disposeCallback();\n};\n\nfunction subscribable () {\n  setPrototypeOfOrExtend(this, ko_subscribable_fn);\n  ko_subscribable_fn.init(this);\n}\n\nvar defaultEvent = 'change';\n\nvar ko_subscribable_fn = {\n  init (instance) {\n    instance._subscriptions = {};\n    instance._versionNumber = 1;\n  },\n\n  subscribe (callback, callbackTarget, event) {\n    var self = this;\n\n    event = event || defaultEvent;\n    var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;\n\n    var subscriptionInstance = new subscription(self, boundCallback, function () {\n      arrayRemoveItem(self._subscriptions[event], subscriptionInstance);\n      if (self.afterSubscriptionRemove) {\n        self.afterSubscriptionRemove(event);\n      }\n    });\n\n    if (self.beforeSubscriptionAdd) {\n      self.beforeSubscriptionAdd(event);\n    }\n\n    if (!self._subscriptions[event]) {\n      self._subscriptions[event] = [];\n    }\n    self._subscriptions[event].push(subscriptionInstance);\n\n    return subscriptionInstance\n  },\n\n  notifySubscribers (valueToNotify, event) {\n    event = event || defaultEvent;\n    if (event === defaultEvent) {\n      this.updateVersion();\n    }\n    if (this.hasSubscriptionsForEvent(event)) {\n      try {\n        begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)\n        for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {\n                    // In case a subscription was disposed during the arrayForEach cycle, check\n                    // for isDisposed on each subscription before invoking its callback\n          if (!subscriptionInstance.isDisposed) {\n            subscriptionInstance.callback(valueToNotify);\n          }\n        }\n      } finally {\n        end(); // End suppressing dependency detection\n      }\n    }\n  },\n\n  getVersion () {\n    return this._versionNumber\n  },\n\n  hasChanged (versionToCheck) {\n    return this.getVersion() !== versionToCheck\n  },\n\n  updateVersion () {\n    ++this._versionNumber;\n  },\n\n  hasSubscriptionsForEvent (event) {\n    return this._subscriptions[event] && this._subscriptions[event].length\n  },\n\n  getSubscriptionsCount (event) {\n    if (event) {\n      return this._subscriptions[event] && this._subscriptions[event].length || 0\n    } else {\n      var total = 0;\n      objectForEach(this._subscriptions, function (eventName, subscriptions) {\n        if (eventName !== 'dirty') {\n          total += subscriptions.length;\n        }\n      });\n      return total\n    }\n  },\n\n  isDifferent (oldValue, newValue) {\n    return !this.equalityComparer ||\n               !this.equalityComparer(oldValue, newValue)\n  },\n\n  once (cb) {\n    const subs = this.subscribe((nv) => {\n      subs.dispose();\n      cb(nv);\n    });\n  },\n\n  when (test, returnValue) {\n    const current = this.peek();\n    const givenRv = arguments.length > 1;\n    const testFn = typeof test === 'function' ? test : v => v === test;\n    if (testFn(current)) {\n      return options.Promise.resolve(givenRv ? returnValue : current)\n    }\n    return new options.Promise((resolve, reject) => {\n      const subs = this.subscribe(newValue => {\n        if (testFn(newValue)) {\n          subs.dispose();\n          resolve(givenRv ? returnValue : newValue);\n        }\n      });\n    })\n  },\n\n  yet (test, ...args) {\n    const testFn = typeof test === 'function' ? test : v => v === test;\n    const negated = v => !testFn(v);\n    return this.when(negated, ...args)\n  },\n\n  next () { return new Promise(resolve => this.once(resolve)) },\n\n  extend: applyExtenders\n};\n\n// For browsers that support proto assignment, we overwrite the prototype of each\n// observable instance. Since observables are functions, we need Function.prototype\n// to still be in the prototype chain.\nif (canSetPrototype) {\n  setPrototypeOf(ko_subscribable_fn, Function.prototype);\n}\n\nsubscribable.fn = ko_subscribable_fn;\n\nfunction isSubscribable (instance) {\n  return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function'\n}\n\n//\n// dependencyDetection\n// ---\n//\n// In KO 3.x, dependencyDetection was also known as computedContext.\n//\nconst outerFrames = [];\nlet currentFrame;\nlet lastId = 0;\n\n// Return a unique ID that can be assigned to an observable for dependency tracking.\n// Theoretically, you could eventually overflow the number storage size, resulting\n// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53\n// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would\n// take over 285 years to reach that number.\n// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html\nfunction getId () {\n  return ++lastId\n}\n\nfunction begin (options$$1) {\n  outerFrames.push(currentFrame);\n  currentFrame = options$$1;\n}\n\nfunction end () {\n  currentFrame = outerFrames.pop();\n}\n\nfunction registerDependency (subscribable$$1) {\n  if (currentFrame) {\n    if (!isSubscribable(subscribable$$1)) { throw new Error('Only subscribable things can act as dependencies') }\n    currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));\n  }\n}\n\nfunction ignore (callback, callbackTarget, callbackArgs) {\n  try {\n    begin();\n    return callback.apply(callbackTarget, callbackArgs || [])\n  } finally {\n    end();\n  }\n}\n\nfunction getDependenciesCount () {\n  if (currentFrame) { return currentFrame.computed.getDependenciesCount() }\n}\n\nfunction isInitial () {\n  if (currentFrame) { return currentFrame.isInitial }\n}\n\n\n\n\nvar dependencyDetection = Object.freeze({\n\tbegin: begin,\n\tend: end,\n\tregisterDependency: registerDependency,\n\tignore: ignore,\n\tgetDependenciesCount: getDependenciesCount,\n\tisInitial: isInitial,\n\tignoreDependencies: ignore\n});\n\n//\n//  Observable values\n//  ---\n//\nvar observableLatestValue = createSymbolOrString('_latestValue');\n\nfunction observable (initialValue) {\n  function Observable () {\n    if (arguments.length > 0) {\n            // Write\n            // Ignore writes if the value hasn't changed\n      if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {\n        Observable.valueWillMutate();\n        Observable[observableLatestValue] = arguments[0];\n        Observable.valueHasMutated();\n      }\n      return this // Permits chained assignments\n    } else {\n            // Read\n      registerDependency(Observable); // The caller only needs to be notified of changes if they did a \"read\" operation\n      return Observable[observableLatestValue]\n    }\n  }\n\n  Observable[observableLatestValue] = initialValue;\n\n    // Inherit from 'subscribable'\n  if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n    extend(Observable, subscribable.fn);\n  }\n  subscribable.fn.init(Observable);\n\n    // Inherit from 'observable'\n  setPrototypeOfOrExtend(Observable, observable.fn);\n\n  if (options.deferUpdates) {\n    deferUpdates(Observable);\n  }\n\n  return Observable\n}\n\n// Define prototype for observables\nobservable.fn = {\n  equalityComparer: valuesArePrimitiveAndEqual,\n  peek () { return this[observableLatestValue] },\n  valueHasMutated () { this.notifySubscribers(this[observableLatestValue]); },\n  valueWillMutate () {\n    this.notifySubscribers(this[observableLatestValue], 'beforeChange');\n  },\n  then (res, rej) { try { res(this()); } catch (e) { rej(e); } },\n};\n\n// Moved out of \"limit\" to avoid the extra closure\nfunction limitNotifySubscribers (value, event) {\n  if (!event || event === defaultEvent) {\n    this._limitChange(value);\n  } else if (event === 'beforeChange') {\n    this._limitBeforeChange(value);\n  } else {\n    this._origNotifySubscribers(value, event);\n  }\n}\n\n// Add `limit` function to the subscribable prototype\nsubscribable.fn.limit = function limit (limitFunction) {\n  var self = this;\n  var selfIsObservable = isObservable(self);\n  var beforeChange = 'beforeChange';\n  var ignoreBeforeChange, previousValue, pendingValue;\n\n  if (!self._origNotifySubscribers) {\n    self._origNotifySubscribers = self.notifySubscribers;\n    self.notifySubscribers = limitNotifySubscribers;\n  }\n\n  var finish = limitFunction(function () {\n    self._notificationIsPending = false;\n\n        // If an observable provided a reference to itself, access it to get the latest value.\n        // This allows computed observables to delay calculating their value until needed.\n    if (selfIsObservable && pendingValue === self) {\n      pendingValue = self();\n    }\n    ignoreBeforeChange = false;\n    if (self.isDifferent(previousValue, pendingValue)) {\n      self._origNotifySubscribers(previousValue = pendingValue);\n    }\n  });\n\n  self._limitChange = function (value) {\n    self._notificationIsPending = ignoreBeforeChange = true;\n    pendingValue = value;\n    finish();\n  };\n  self._limitBeforeChange = function (value) {\n    if (!ignoreBeforeChange) {\n      previousValue = value;\n      self._origNotifySubscribers(value, beforeChange);\n    }\n  };\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the observable constructor\nif (canSetPrototype) {\n  setPrototypeOf(observable.fn, subscribable.fn);\n}\n\nvar protoProperty = observable.protoProperty = options.protoProperty;\nobservable.fn[protoProperty] = observable;\n\nfunction isObservable (instance) {\n  return hasPrototype(instance, observable)\n}\n\nfunction unwrap (value) {\n  return isObservable(value) ? value() : value\n}\n\nfunction peek (value) {\n  return isObservable(value) ? value.peek() : value\n}\n\nfunction isWriteableObservable (instance) {\n    // Observable\n  if ((typeof instance === 'function') && instance[protoProperty] === observable) {\n    return true\n  }\n    // Writeable dependent observable\n  if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {\n    return true\n  }\n    // Anything else\n  return false\n}\n\n//\n// Observable Array - Change Tracking Extender\n// ---\n//\n/* eslint no-fallthrough: 0*/\n\nvar arrayChangeEventName = 'arrayChange';\n\n\nfunction trackArrayChanges(target, options$$1) {\n    // Use the provided options--each call to trackArrayChanges overwrites the previously set options\n    target.compareArrayOptions = {};\n    if (options$$1 && typeof options$$1 == \"object\") {\n        extend(target.compareArrayOptions, options$$1);\n    }\n    target.compareArrayOptions.sparse = true;\n\n    // Only modify the target observable once\n    if (target.cacheDiffForKnownOperation) {\n        return;\n    }\n    var trackingChanges = false,\n        cachedDiff = null,\n        arrayChangeSubscription,\n        pendingNotifications = 0,\n        underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,\n        underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;\n\n    // Watch \"subscribe\" calls, and for array change events, ensure change tracking is enabled\n    target.beforeSubscriptionAdd = function (event) {\n        if (underlyingBeforeSubscriptionAddFunction)\n            underlyingBeforeSubscriptionAddFunction.call(target, event);\n        if (event === arrayChangeEventName) {\n            trackChanges();\n        }\n    };\n\n    // Watch \"dispose\" calls, and for array change events, ensure change tracking is disabled when all are disposed\n    target.afterSubscriptionRemove = function (event) {\n        if (underlyingAfterSubscriptionRemoveFunction)\n            underlyingAfterSubscriptionRemoveFunction.call(target, event);\n        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n            if (arrayChangeSubscription) {\n                arrayChangeSubscription.dispose();\n            }\n            arrayChangeSubscription = null;\n            trackingChanges = false;\n        }\n    };\n\n    function trackChanges() {\n        // Calling 'trackChanges' multiple times is the same as calling it once\n        if (trackingChanges) {\n            return;\n        }\n\n        trackingChanges = true;\n\n        // Intercept \"notifySubscribers\" to track how many times it was called.\n        var underlyingNotifySubscribersFunction = target['notifySubscribers'];\n        target['notifySubscribers'] = function(valueToNotify, event) {\n            if (!event || event === defaultEvent) {\n                ++pendingNotifications;\n            }\n            return underlyingNotifySubscribersFunction.apply(this, arguments);\n        };\n\n        // Each time the array changes value, capture a clone so that on the next\n        // change it's possible to produce a diff\n        var previousContents = [].concat(target.peek() || []);\n        cachedDiff = null;\n        arrayChangeSubscription = target.subscribe(function(currentContents) {\n            // Make a copy of the current contents and ensure it's an array\n            currentContents = [].concat(currentContents || []);\n\n            // Compute the diff and issue notifications, but only if someone is listening\n            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n                var changes = getChanges(previousContents, currentContents);\n            }\n\n            // Eliminate references to the old, removed items, so they can be GCed\n            previousContents = currentContents;\n            cachedDiff = null;\n            pendingNotifications = 0;\n\n            if (changes && changes.length) {\n                target['notifySubscribers'](changes, arrayChangeEventName);\n            }\n        });\n    }\n\n    function getChanges(previousContents, currentContents) {\n        // We try to re-use cached diffs.\n        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates\n        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,\n        // notifications are issued immediately so we wouldn't be queueing up more than one.\n        if (!cachedDiff || pendingNotifications > 1) {\n            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);\n        }\n\n        return cachedDiff;\n    }\n\n    target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {\n        var index, argsIndex;\n        // Only run if we're currently tracking changes for this observable array\n        // and there aren't any pending deferred notifications.\n        if (!trackingChanges || pendingNotifications) {\n            return;\n        }\n        var diff = [],\n            arrayLength = rawArray.length,\n            argsLength = args.length,\n            offset = 0;\n\n        function pushDiff(status, value, index) {\n            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };\n        }\n        switch (operationName) {\n        case 'push':\n            offset = arrayLength;\n        case 'unshift':\n            for (index = 0; index < argsLength; index++) {\n                pushDiff('added', args[index], offset + index);\n            }\n            break;\n\n        case 'pop':\n            offset = arrayLength - 1;\n        case 'shift':\n            if (arrayLength) {\n                pushDiff('deleted', rawArray[offset], offset);\n            }\n            break;\n\n        case 'splice':\n            // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].\n            // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice\n            var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),\n                endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),\n                endAddIndex = startIndex + argsLength - 2,\n                endIndex = Math.max(endDeleteIndex, endAddIndex),\n                additions = [], deletions = [];\n            for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {\n                if (index < endDeleteIndex)\n                    deletions.push(pushDiff('deleted', rawArray[index], index));\n                if (index < endAddIndex)\n                    additions.push(pushDiff('added', args[argsIndex], index));\n            }\n            findMovesInArrayComparison(deletions, additions);\n            break;\n\n        default:\n            return;\n        }\n        cachedDiff = diff;\n    };\n}\n\n\n// Expose compareArrays for testing.\ntrackArrayChanges.compareArrays = compareArrays;\n\n\n// Add the trackArrayChanges extender so we can use\n// obs.extend({ trackArrayChanges: true })\nextenders.trackArrayChanges = trackArrayChanges;\n\n//\n// Observable Arrays\n// ===\n//\nfunction observableArray (initialValues) {\n  initialValues = initialValues || [];\n\n  if (typeof initialValues !== 'object' || !('length' in initialValues)) { throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.') }\n\n  var result = observable(initialValues);\n  setPrototypeOfOrExtend(result, observableArray.fn);\n  trackArrayChanges(result);\n        // ^== result.extend({ trackArrayChanges: true })\n  return result\n}\n\nobservableArray.fn = {\n  remove: function (valueOrPredicate) {\n    var underlyingArray = this.peek();\n    var removedValues = [];\n    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };\n    for (var i = 0; i < underlyingArray.length; i++) {\n      var value = underlyingArray[i];\n      if (predicate(value)) {\n        if (removedValues.length === 0) {\n          this.valueWillMutate();\n        }\n        removedValues.push(value);\n        underlyingArray.splice(i, 1);\n        i--;\n      }\n    }\n    if (removedValues.length) {\n      this.valueHasMutated();\n    }\n    return removedValues\n  },\n\n  removeAll: function (arrayOfValues) {\n        // If you passed zero args, we remove everything\n    if (arrayOfValues === undefined) {\n      var underlyingArray = this.peek();\n      var allValues = underlyingArray.slice(0);\n      this.valueWillMutate();\n      underlyingArray.splice(0, underlyingArray.length);\n      this.valueHasMutated();\n      return allValues\n    }\n        // If you passed an arg, we interpret it as an array of entries to remove\n    if (!arrayOfValues) {\n      return []\n    }\n    return this['remove'](function (value) {\n      return arrayIndexOf(arrayOfValues, value) >= 0\n    })\n  },\n\n  destroy: function (valueOrPredicate) {\n    var underlyingArray = this.peek();\n    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };\n    this.valueWillMutate();\n    for (var i = underlyingArray.length - 1; i >= 0; i--) {\n      var value = underlyingArray[i];\n      if (predicate(value)) {\n        underlyingArray[i]['_destroy'] = true;\n      }\n    }\n    this.valueHasMutated();\n  },\n\n  destroyAll: function (arrayOfValues) {\n        // If you passed zero args, we destroy everything\n    if (arrayOfValues === undefined) { return this.destroy(function () { return true }) }\n\n        // If you passed an arg, we interpret it as an array of entries to destroy\n    if (!arrayOfValues) {\n      return []\n    }\n    return this.destroy(function (value) {\n      return arrayIndexOf(arrayOfValues, value) >= 0\n    })\n  },\n\n  indexOf: function (item) {\n    var underlyingArray = this();\n    return arrayIndexOf(underlyingArray, item)\n  },\n\n  replace: function (oldItem, newItem) {\n    var index = this.indexOf(oldItem);\n    if (index >= 0) {\n      this.valueWillMutate();\n      this.peek()[index] = newItem;\n      this.valueHasMutated();\n    }\n  }\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.observableArray constructor\nif (canSetPrototype) {\n  setPrototypeOf(observableArray.fn, observable.fn);\n}\n\n// Populate ko.observableArray.fn with read/write functions from native arrays\n// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array\n// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale\narrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {\n  observableArray.fn[methodName] = function () {\n        // Use \"peek\" to avoid creating a subscription in any computed that we're executing in the context of\n        // (for consistency with mutating regular observables)\n    var underlyingArray = this.peek();\n    this.valueWillMutate();\n    this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);\n    var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);\n    this.valueHasMutated();\n        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.\n    return methodCallResult === underlyingArray ? this : methodCallResult\n  };\n});\n\n// Populate ko.observableArray.fn with read-only functions from native arrays\narrayForEach(['slice'], function (methodName) {\n  observableArray.fn[methodName] = function () {\n    var underlyingArray = this();\n    return underlyingArray[methodName].apply(underlyingArray, arguments)\n  };\n});\n\n//\n// Helpers\n// ---\n// toJS & toJSON\n//\nvar maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)\n\nfunction toJS(rootObject) {\n    if (arguments.length == 0)\n        throw new Error(\"When calling ko.toJS, pass the object you want to convert.\");\n\n    // We just unwrap everything at every level in the object graph\n    return mapJsObjectGraph(rootObject, function(valueToMap) {\n        // Loop because an observable's value might in turn be another observable wrapper\n        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)\n            valueToMap = valueToMap();\n        return valueToMap;\n    });\n}\n\nfunction toJSON(rootObject, replacer, space) {     // replacer and space are optional\n    var plainJavaScriptObject = toJS(rootObject);\n    return stringifyJson(plainJavaScriptObject, replacer, space);\n}\n\nfunction mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {\n    visitedObjects = visitedObjects || new objectLookup();\n\n    rootObject = mapInputCallback(rootObject);\n    var canHaveProperties = (typeof rootObject == \"object\") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));\n    if (!canHaveProperties)\n        return rootObject;\n\n    var outputProperties = rootObject instanceof Array ? [] : {};\n    visitedObjects.save(rootObject, outputProperties);\n\n    visitPropertiesOrArrayEntries(rootObject, function(indexer) {\n        var propertyValue = mapInputCallback(rootObject[indexer]);\n\n        switch (typeof propertyValue) {\n        case \"boolean\":\n        case \"number\":\n        case \"string\":\n        case \"function\":\n            outputProperties[indexer] = propertyValue;\n            break;\n        case \"object\":\n        case \"undefined\":\n            var previouslyMappedValue = visitedObjects.get(propertyValue);\n            outputProperties[indexer] = (previouslyMappedValue !== undefined)\n                ? previouslyMappedValue\n                : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);\n            break;\n        }\n    });\n\n    return outputProperties;\n}\n\nfunction visitPropertiesOrArrayEntries(rootObject, visitorCallback) {\n    if (rootObject instanceof Array) {\n        for (var i = 0; i < rootObject.length; i++)\n            visitorCallback(i);\n\n        // For arrays, also respect toJSON property for custom mappings (fixes #278)\n        if (typeof rootObject['toJSON'] == 'function')\n            visitorCallback('toJSON');\n    } else {\n        for (var propertyName in rootObject) {\n            visitorCallback(propertyName);\n        }\n    }\n}\n\nfunction objectLookup() {\n    this.keys = [];\n    this.values = [];\n}\n\nobjectLookup.prototype = {\n    constructor: objectLookup,\n    save: function(key, value) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        if (existingIndex >= 0)\n            this.values[existingIndex] = value;\n        else {\n            this.keys.push(key);\n            this.values.push(value);\n        }\n    },\n    get: function(key) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;\n    }\n};\n\n//\n// Observables.\n// ---\n//\n// The following are added to the root `[t]ko` object.\n//\n\nexport { dependencyDetection, observable, isObservable, unwrap, peek, isWriteableObservable, isWriteableObservable as isWritableObservable, isSubscribable, subscribable, observableArray, trackArrayChanges, arrayChangeEventName, toJS, toJSON, deferUpdates, valuesArePrimitiveAndEqual, applyExtenders, extenders };\n//# sourceMappingURL=tko.observable.es6.js.map\n","import { addDisposeCallback, arrayForEach, canSetPrototype, createSymbolOrString, domNodeIsAttachedToDocument, extend, hasPrototype, objectForEach, options, removeDisposeCallback, safeSetTimeout, setPrototypeOf, setPrototypeOfOrExtend } from 'tko.utils';\nimport { dependencyDetection, extenders, observable, subscribable, valuesArePrimitiveAndEqual } from 'tko.observable';\n\n//\n// Computed Observable Values\n//\n// (before tko, `computed` was also known as `dependentObservable`)\n//\nvar computedState = createSymbolOrString('_state');\n\nfunction computed (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {\n  if (typeof evaluatorFunctionOrOptions === 'object') {\n        // Single-parameter syntax - everything is on this \"options\" param\n    options$$1 = evaluatorFunctionOrOptions;\n  } else {\n        // Multi-parameter syntax - construct the options according to the params passed\n    options$$1 = options$$1 || {};\n    if (evaluatorFunctionOrOptions) {\n      options$$1.read = evaluatorFunctionOrOptions;\n    }\n  }\n  if (typeof options$$1.read !== 'function') {\n    throw Error('Pass a function that returns the value of the computed')\n  }\n\n  var writeFunction = options$$1.write;\n  var state = {\n    latestValue: undefined,\n    isStale: true,\n    isBeingEvaluated: false,\n    suppressDisposalUntilDisposeWhenReturnsFalse: false,\n    isDisposed: false,\n    pure: false,\n    isSleeping: false,\n    readFunction: options$$1.read,\n    evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,\n    disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,\n    disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,\n    domNodeDisposalCallback: null,\n    dependencyTracking: {},\n    dependenciesCount: 0,\n    evaluationTimeoutInstance: null\n  };\n\n  function computedObservable () {\n    if (arguments.length > 0) {\n      if (typeof writeFunction === 'function') {\n                // Writing a value\n        writeFunction.apply(state.evaluatorFunctionTarget, arguments);\n      } else {\n        throw new Error(\"Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.\")\n      }\n      return this // Permits chained assignments\n    } else {\n            // Reading the value\n      dependencyDetection.registerDependency(computedObservable);\n      if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {\n        computedObservable.evaluateImmediate();\n      }\n      return state.latestValue\n    }\n  }\n\n  computedObservable[computedState] = state;\n  computedObservable.hasWriteFunction = typeof writeFunction === 'function';\n\n    // Inherit from 'subscribable'\n  if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n    extend(computedObservable, subscribable.fn);\n  }\n  subscribable.fn.init(computedObservable);\n\n    // Inherit from 'computed'\n  setPrototypeOfOrExtend(computedObservable, computed.fn);\n\n  if (options$$1.pure) {\n    state.pure = true;\n    state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription\n    extend(computedObservable, pureComputedOverrides);\n  } else if (options$$1.deferEvaluation) {\n    extend(computedObservable, deferEvaluationOverrides);\n  }\n\n  if (options.deferUpdates) {\n    extenders.deferred(computedObservable, true);\n  }\n\n  if (options.debug) {\n        // #1731 - Aid debugging by exposing the computed's options\n    computedObservable._options = options$$1;\n  }\n\n  if (state.disposeWhenNodeIsRemoved) {\n        // Since this computed is associated with a DOM node, and we don't want to dispose the computed\n        // until the DOM node is *removed* from the document (as opposed to never having been in the document),\n        // we'll prevent disposal until \"disposeWhen\" first returns false.\n    state.suppressDisposalUntilDisposeWhenReturnsFalse = true;\n\n        // disposeWhenNodeIsRemoved: true can be used to opt into the \"only dispose after first false result\"\n        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try\n        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't\n        // be documented or used by application code, as it's likely to change in a future version of KO.\n    if (!state.disposeWhenNodeIsRemoved.nodeType) {\n      state.disposeWhenNodeIsRemoved = null;\n    }\n  }\n\n    // Evaluate, unless sleeping or deferEvaluation is true\n  if (!state.isSleeping && !options$$1.deferEvaluation) {\n    computedObservable.evaluateImmediate();\n  }\n\n    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is\n    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).\n  if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {\n    addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {\n      computedObservable.dispose();\n    });\n  }\n\n  return computedObservable\n}\n\n// Utility function that disposes a given dependencyTracking entry\nfunction computedDisposeDependencyCallback (id, entryToDispose) {\n  if (entryToDispose !== null && entryToDispose.dispose) {\n    entryToDispose.dispose();\n  }\n}\n\n// This function gets called each time a dependency is detected while evaluating a computed.\n// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.\nfunction computedBeginDependencyDetectionCallback (subscribable$$1, id) {\n  var computedObservable = this.computedObservable,\n    state = computedObservable[computedState];\n  if (!state.isDisposed) {\n    if (this.disposalCount && this.disposalCandidates[id]) {\n            // Don't want to dispose this subscription, as it's still being used\n      computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);\n      this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway\n      --this.disposalCount;\n    } else if (!state.dependencyTracking[id]) {\n            // Brand new subscription - add it\n      computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));\n    }\n  }\n}\n\ncomputed.fn = {\n  equalityComparer: valuesArePrimitiveAndEqual,\n  getDependenciesCount: function () {\n    return this[computedState].dependenciesCount\n  },\n  addDependencyTracking: function (id, target, trackingObj) {\n    if (this[computedState].pure && target === this) {\n      throw Error(\"A 'pure' computed must not be called recursively\")\n    }\n\n    this[computedState].dependencyTracking[id] = trackingObj;\n    trackingObj._order = this[computedState].dependenciesCount++;\n    trackingObj._version = target.getVersion();\n  },\n  haveDependenciesChanged: function () {\n    var id, dependency, dependencyTracking = this[computedState].dependencyTracking;\n    for (id in dependencyTracking) {\n      if (dependencyTracking.hasOwnProperty(id)) {\n        dependency = dependencyTracking[id];\n        if (dependency._target.hasChanged(dependency._version)) {\n          return true\n        }\n      }\n    }\n  },\n  markDirty: function () {\n        // Process \"dirty\" events if we can handle delayed notifications\n    if (this._evalDelayed && !this[computedState].isBeingEvaluated) {\n      this._evalDelayed();\n    }\n  },\n  isActive: function () {\n    return this[computedState].isStale || this[computedState].dependenciesCount > 0\n  },\n  respondToChange: function () {\n        // Ignore \"change\" events if we've already scheduled a delayed notification\n    if (!this._notificationIsPending) {\n      this.evaluatePossiblyAsync();\n    }\n  },\n  subscribeToDependency: function (target) {\n    if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {\n      var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),\n        changeSub = target.subscribe(this.respondToChange, this);\n      return {\n        _target: target,\n        dispose: function () {\n          dirtySub.dispose();\n          changeSub.dispose();\n        }\n      }\n    } else {\n      return target.subscribe(this.evaluatePossiblyAsync, this)\n    }\n  },\n  evaluatePossiblyAsync: function () {\n    var computedObservable = this,\n      throttleEvaluationTimeout = computedObservable.throttleEvaluation;\n    if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {\n      clearTimeout(this[computedState].evaluationTimeoutInstance);\n      this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {\n        computedObservable.evaluateImmediate(true /* notifyChange */);\n      }, throttleEvaluationTimeout);\n    } else if (computedObservable._evalDelayed) {\n      computedObservable._evalDelayed();\n    } else {\n      computedObservable.evaluateImmediate(true /* notifyChange */);\n    }\n  },\n  evaluateImmediate: function (notifyChange) {\n    var computedObservable = this,\n      state = computedObservable[computedState],\n      disposeWhen = state.disposeWhen;\n\n    if (state.isBeingEvaluated) {\n            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.\n            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost\n            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing\n            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387\n      return\n    }\n\n        // Do not evaluate (and possibly capture new dependencies) if disposed\n    if (state.isDisposed) {\n      return\n    }\n\n    if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {\n            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse\n      if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {\n        computedObservable.dispose();\n        return\n      }\n    } else {\n            // It just did return false, so we can stop suppressing now\n      state.suppressDisposalUntilDisposeWhenReturnsFalse = false;\n    }\n\n    state.isBeingEvaluated = true;\n    try {\n      this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);\n    } finally {\n      state.isBeingEvaluated = false;\n    }\n\n    if (!state.dependenciesCount) {\n      computedObservable.dispose();\n    }\n  },\n  evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {\n        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.\n        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,\n        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).\n\n    var computedObservable = this,\n      state = computedObservable[computedState];\n\n        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).\n        // Then, during evaluation, we cross off any that are in fact still being used.\n    var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time\n      dependencyDetectionContext = {\n        computedObservable: computedObservable,\n        disposalCandidates: state.dependencyTracking,\n        disposalCount: state.dependenciesCount\n      };\n\n    dependencyDetection.begin({\n      callbackTarget: dependencyDetectionContext,\n      callback: computedBeginDependencyDetectionCallback,\n      computed: computedObservable,\n      isInitial: isInitial\n    });\n\n    state.dependencyTracking = {};\n    state.dependenciesCount = 0;\n\n    var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);\n\n    if (computedObservable.isDifferent(state.latestValue, newValue)) {\n      if (!state.isSleeping) {\n        computedObservable.notifySubscribers(state.latestValue, 'beforeChange');\n      }\n\n      state.latestValue = newValue;\n\n      if (state.isSleeping) {\n        computedObservable.updateVersion();\n      } else if (notifyChange) {\n        computedObservable.notifySubscribers(state.latestValue);\n      }\n    }\n\n    if (isInitial) {\n      computedObservable.notifySubscribers(state.latestValue, 'awake');\n    }\n  },\n  evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {\n        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.\n        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection\n        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU\n        // overhead of computed evaluation (on V8 at least).\n\n    try {\n      var readFunction = state.readFunction;\n      return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction()\n    } finally {\n      dependencyDetection.end();\n\n            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it\n      if (dependencyDetectionContext.disposalCount && !state.isSleeping) {\n        objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);\n      }\n\n      state.isStale = false;\n    }\n  },\n  peek: function () {\n        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when \"deferEvaluation\" is set.\n    var state = this[computedState];\n    if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {\n      this.evaluateImmediate();\n    }\n    return state.latestValue\n  },\n  limit: function (limitFunction) {\n        // Override the limit function with one that delays evaluation as well\n    subscribable.fn.limit.call(this, limitFunction);\n    this._evalDelayed = function () {\n      this._limitBeforeChange(this[computedState].latestValue);\n\n      this[computedState].isStale = true; // Mark as dirty\n\n            // Pass the observable to the \"limit\" code, which will access it when\n            // it's time to do the notification.\n      this._limitChange(this);\n    };\n  },\n  dispose: function () {\n    var state = this[computedState];\n    if (!state.isSleeping && state.dependencyTracking) {\n      objectForEach(state.dependencyTracking, function (id, dependency) {\n        if (dependency.dispose) {\n          dependency.dispose();\n        }\n      });\n    }\n    if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {\n      removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);\n    }\n    state.dependencyTracking = null;\n    state.dependenciesCount = 0;\n    state.isDisposed = true;\n    state.isStale = false;\n    state.isSleeping = false;\n    state.disposeWhenNodeIsRemoved = null;\n    state.readFunction = null;\n    if (options.debug) {\n      this._options = null;\n    }\n  }\n};\n\nvar pureComputedOverrides = {\n  beforeSubscriptionAdd: function (event) {\n        // If asleep, wake up the computed by subscribing to any dependencies.\n    var computedObservable = this,\n      state = computedObservable[computedState];\n    if (!state.isDisposed && state.isSleeping && event == 'change') {\n      state.isSleeping = false;\n      if (state.isStale || computedObservable.haveDependenciesChanged()) {\n        state.dependencyTracking = null;\n        state.dependenciesCount = 0;\n        state.isStale = true;\n        computedObservable.evaluateImmediate();\n      } else {\n                // First put the dependencies in order\n        var dependeciesOrder = [];\n        objectForEach(state.dependencyTracking, function (id, dependency) {\n          dependeciesOrder[dependency._order] = id;\n        });\n                // Next, subscribe to each one\n        arrayForEach(dependeciesOrder, function (id, order) {\n          var dependency = state.dependencyTracking[id],\n            subscription = computedObservable.subscribeToDependency(dependency._target);\n          subscription._order = order;\n          subscription._version = dependency._version;\n          state.dependencyTracking[id] = subscription;\n        });\n      }\n      if (!state.isDisposed) {     // test since evaluating could trigger disposal\n        computedObservable.notifySubscribers(state.latestValue, 'awake');\n      }\n    }\n  },\n  afterSubscriptionRemove: function (event) {\n    var state = this[computedState];\n    if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {\n      objectForEach(state.dependencyTracking, function (id, dependency) {\n        if (dependency.dispose) {\n          state.dependencyTracking[id] = {\n            _target: dependency._target,\n            _order: dependency._order,\n            _version: dependency._version\n          };\n          dependency.dispose();\n        }\n      });\n      state.isSleeping = true;\n      this.notifySubscribers(undefined, 'asleep');\n    }\n  },\n  getVersion: function () {\n        // Because a pure computed is not automatically updated while it is sleeping, we can't\n        // simply return the version number. Instead, we check if any of the dependencies have\n        // changed and conditionally re-evaluate the computed observable.\n    var state = this[computedState];\n    if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {\n      this.evaluateImmediate();\n    }\n    return subscribable.fn.getVersion.call(this)\n  }\n};\n\nvar deferEvaluationOverrides = {\n  beforeSubscriptionAdd: function (event) {\n        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.\n    if (event == 'change' || event == 'beforeChange') {\n      this.peek();\n    }\n  }\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.computed constructor\nif (canSetPrototype) {\n  setPrototypeOf(computed.fn, subscribable.fn);\n}\n\n// Set the proto chain values for ko.hasPrototype\nvar protoProp = observable.protoProperty; // == \"__ko_proto__\"\ncomputed[protoProp] = observable;\ncomputed.fn[protoProp] = computed;\n\nfunction isComputed (instance) {\n  return hasPrototype(instance, computed)\n}\n\nfunction isPureComputed (instance) {\n  return hasPrototype(instance, computed)\n        && instance[computedState] && instance[computedState].pure\n}\n\nfunction pureComputed (evaluatorFunctionOrOptions, evaluatorFunctionTarget) {\n  if (typeof evaluatorFunctionOrOptions === 'function') {\n    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, {'pure': true})\n  } else {\n    evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions);   // make a copy of the parameter object\n    evaluatorFunctionOrOptions.pure = true;\n    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget)\n  }\n}\n\nfunction throttleExtender(target, timeout) {\n    // Throttling means two things:\n\n    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies\n    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate\n    target.throttleEvaluation = timeout;\n\n    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*\n    //     so the target cannot change value synchronously or faster than a certain rate\n    var writeTimeoutInstance = null;\n    return computed({\n        read: target,\n        write: function(value) {\n            clearTimeout(writeTimeoutInstance);\n            writeTimeoutInstance = setTimeout(function() {\n                target(value);\n            }, timeout);\n        }\n    });\n}\n\n\nextenders.throttle = throttleExtender;\n\n//\n// tko.computed - Exports\n//\n// knockout -> tko changes:\n//      Deprecates `dependentObservable` (use `computed`)\n//\n\nexport { computed, isComputed, isPureComputed, pureComputed, throttleExtender };\n//# sourceMappingURL=tko.computed.es6.js.map\n","import { clonePlainObjectDeep, extend, objectForEach, options, stringTrim } from 'tko.utils';\nimport { isObservable, isWriteableObservable, unwrap } from 'tko.observable';\n\nfunction LAMBDA () {}\n\n/**\n * @ operator - recursively call the identifier if it's a function\n * @param  {operand} a ignored\n * @param  {operand} b The variable to be called (if a function) and unwrapped\n * @return {value}   The result.\n */\nfunction unwrapOrCall (a, b) {\n  while (typeof b === 'function') { b = b(); }\n  return b\n}\n\nconst operators = {\n  // unary\n  '@': unwrapOrCall,\n  '#': (a, b) => () => unwrap(b), // Convert to read-only.\n  '=>': LAMBDA,\n  '!': function not (a, b) { return !b },\n  '!!': function notnot (a, b) { return !!b },\n  '++': function preinc (a, b) { return ++b },\n  '--': function preinc (a, b) { return --b },\n  // mul/div\n  '*': function mul (a, b) { return a * b },\n  '/': function div (a, b) { return a / b },\n  '%': function mod (a, b) { return a % b },\n  // sub/add\n  '+': function add (a, b) { return a + b },\n  '-': function sub (a, b) { return (a || 0) - (b || 0) },\n  '&-': function neg (a, b) { return -1 * b },\n  // relational\n  '<': function lt (a, b) { return a < b },\n  '<=': function le (a, b) { return a <= b },\n  '>': function gt (a, b) { return a > b },\n  '>=': function ge (a, b) { return a >= b },\n  //    TODO: 'in': function (a, b) { return a in b; },\n  //    TODO: 'instanceof': function (a, b) { return a instanceof b; },\n  // equality\n  '==': function equal (a, b) { return a === b },\n  '!=': function ne (a, b) { return a !== b },\n  '===': function sequal (a, b) { return a === b },\n  '!==': function sne (a, b) { return a !== b },\n  // bitwise\n  '&': function bitAnd (a, b) { return a & b },\n  '^': function xor (a, b) { return a ^ b },\n  '|': function bitOr (a, b) { return a | b },\n  // logic\n  '&&': function logicAnd (a, b) { return a && b },\n  '||': function logicOr (a, b) { return a || b },\n  // Access\n  '.': function member (a, b) { return a[b] },\n  '[': function member (a, b) { return a[b] },\n  // conditional/ternary\n  // '?': ternary See Node.js\n  // Function-Call\n  'call': function callOp (a, b) { return a.apply(null, b) }\n};\n\n/* Order of precedence from:\nhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table\n*/\n\n  // Our operator - unwrap/call\noperators['@'].precedence = 21;\noperators['#'].precedence = 21;\n\n  // lambda\noperators['=>'].precedence = 20;\n\n  // Member\noperators['.'].precedence = 19;\noperators['['].precedence = 19;\n\n  // Logical not\noperators['!'].precedence = 16;\noperators['!!'].precedence = 16; // explicit double-negative\n\n  // Prefix inc/dec\noperators['++'].precedence = 16;\noperators['--'].precedence = 16;\noperators['&-'].precedence = 16;\n\n  // mul/div/remainder\noperators['%'].precedence = 14;\noperators['*'].precedence = 14;\noperators['/'].precedence = 14;\n\n  // add/sub\noperators['+'].precedence = 13;\noperators['-'].precedence = 13;\n\n  // bitwise\noperators['|'].precedence = 12;\noperators['^'].precedence = 11;\noperators['&'].precedence = 10;\n\n  // comparison\noperators['<'].precedence = 11;\noperators['<='].precedence = 11;\noperators['>'].precedence = 11;\noperators['>='].precedence = 11;\n\n  // operators['in'].precedence = 8;\n  // operators['instanceof'].precedence = 8;\n  // equality\noperators['=='].precedence = 10;\noperators['!='].precedence = 10;\noperators['==='].precedence = 10;\noperators['!=='].precedence = 10;\n\n  // logic\noperators['&&'].precedence = 6;\noperators['||'].precedence = 5;\n\noperators['&&'].earlyOut = (a) => !a;\noperators['||'].earlyOut = (a) => a;\n\n  // Call a function\noperators['call'].precedence = 1;\n\nconst IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');\n\nclass Node {\n  constructor (lhs, op, rhs) {\n    this.lhs = lhs;\n    this.op = op;\n    this.rhs = rhs;\n  }\n\n  static get operators () { return operators }\n\n  get_leaf_value (leaf, context, globals, node) {\n    if (typeof leaf === 'function') {\n      // Expressions on observables are nonsensical, so we unwrap any\n      // function values (e.g. identifiers).\n      return unwrap(leaf())\n    }\n\n    // primitives\n    if (typeof leaf !== 'object' || leaf === null) { return leaf }\n\n    // Identifiers and Expressions\n    if (leaf[Node.isExpressionOrIdentifierSymbol]) {\n      // lhs is passed in as the parent of the leaf. It will be defined in\n      // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.\n      return unwrap(leaf.get_value(undefined, context, globals, node))\n    }\n\n    // Plain object/class.\n    return leaf\n  }\n\n  /**\n   * Return a function that calculates and returns an expression's value\n   * when called.\n   * @param  {array} ops  The operations to perform\n   * @return {function}   The function that calculates the expression.\n   *\n   * Note that for a lambda, we do not evaluate the RHS expression until\n   * the lambda is called.\n   */\n  get_value (notused, context, globals, node) {\n    var node = this;\n\n    if (node.op === LAMBDA) {\n      return () => node.get_leaf_value(node.rhs, context, globals, node)\n    }\n\n    const lhv = node.get_leaf_value(node.lhs, context, globals, node);\n    const earlyOut = node.op.earlyOut;\n\n    if (earlyOut && earlyOut(lhv)) { return lhv }\n    const rhv = node.get_leaf_value(node.rhs, context, globals, node);\n\n    return node.op(lhv, rhv, context, globals)\n  }\n\n  //\n  // Class variables.\n  //\n  static get isExpressionOrIdentifierSymbol () { return IS_EXPR_OR_IDENT }\n  get [IS_EXPR_OR_IDENT] () { return true }\n\n  static value_of (item, context, globals, node) {\n    if (item && item[Node.isExpressionOrIdentifierSymbol]) {\n      return item.get_value(item, context, globals, node)\n    }\n    return item\n  }\n\n  /**\n  *  Convert an array of nodes to an executable tree.\n  *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding\n  *                      to the left hand side, right hand side, and\n  *                      operation function.\n  */\n  static create_root (nodes) {\n    var root, leaf, op, value;\n\n    // Prime the leaf = root node.\n    leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());\n\n    while (true) {\n      op = nodes.shift();\n      value = nodes.shift();\n      if (!op) {\n        break\n      }\n      if (op.precedence < root.op.precedence) {\n        // rebase\n        root = new Node(root, op, value);\n        leaf = root;\n      } else {\n        leaf.rhs = new Node(leaf.rhs, op, value);\n        leaf = leaf.rhs;\n      }\n    }\n    // console.log('tree', root)\n    return root\n  }\n}\n\n/**\n * Because of cyclical dependencies on operators <-> Node <-> value_of,\n * we need to patch this in here.\n */\noperators['?'] = function ternary (a, b, context, globals, node) {\n  return Node.value_of(a ? b.yes : b.no, context, globals, node)\n};\noperators['?'].precedence = 4;\n\nclass Expression {\n  constructor (nodes) {\n    this.nodes = nodes;\n    this.root = Node.create_root(nodes);\n  }\n\n  /**\n   * Return the value of `this` Expression instance.\n   */\n  get_value (parent, context, globals, node) {\n    if (!this.root) {\n      this.root = Node.create_root(this.nodes);\n    }\n    return this.root.get_value(parent, context, globals, node)\n  }\n}\n\nExpression.prototype[Node.isExpressionOrIdentifierSymbol] = true;\n\nclass Arguments {\n  constructor (parser, args) {\n    this.parser = parser;\n    this.args = args;\n  }\n\n  get_value (parent, context, globals, node) {\n    var deReffedArgs = [];\n    for (var i = 0, j = this.args.length; i < j; ++i) {\n      deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));\n    }\n    return deReffedArgs\n  };\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\n/**\n * The following regular expressions were generated by\n *  https://mathiasbynens.be/demo/javascript-identifier-regex\n */\nvar IDStart = /[\\$A-Z_a-z\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B4\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D5F-\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FD5\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7AD\\uA7B0-\\uA7B7\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB65\\uAB70-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]/;\n\nvar IDContinue = 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Identifier {\n  constructor (parser, token, dereferences) {\n    this.token = token;\n    this.dereferences = dereferences;\n    this.parser = parser;\n  }\n\n  /**\n   * Apply all () and [] functions on the identifier to the lhs value e.g.\n   * a()[3] has deref functions that are essentially this:\n   *     [_deref_call, _deref_this where this=3]\n   *\n   * @param  {mixed} value  Should be an object.\n   * @return {mixed}        The dereferenced value.\n   *\n   * [1] We want to bind any function that is a method of an object, but not\n   *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where\n   *     we're given `data-bind='binding: obj.x'` and x is a computed will\n   *     break the computed's `this` and it will stop working as expected.\n   *\n   *     The test `!last_value.hasOwnProperty(member)`\n   *     distinguishes between functions on the prototype chain (prototypal\n   *     members) and value-members added directly to the object.  This may\n   *     not be the canonical test for this relationship, but it succeeds\n   *     in the known test cases.\n   *\n   *     See: `this` tests of our dereference function.\n   */\n  dereference (value, $context, globals, node) {\n    let member;\n    let refs = this.dereferences || [];\n    const $data = $context.$data || {};\n    let lastValue;  // becomes `this` in function calls to object properties.\n    let i, n;\n\n    for (i = 0, n = refs.length; i < n; ++i) {\n      member = Node.value_of(refs[i], $context, globals, node);\n\n      if (typeof value === 'function' && refs[i] instanceof Arguments) {\n        // fn(args)\n        value = value.apply(lastValue || $data, member);\n        lastValue = value;\n      } else {\n        // obj[x] or obj.x dereference.  Note that obj may be a function.\n        lastValue = value;\n        value = Node.value_of(value[member], $context, globals, node);\n      }\n    }\n\n    // [1] See note above.\n    if (typeof value === 'function' && n > 0 && lastValue !== value &&\n        !lastValue.hasOwnProperty(member)) {\n      return value.bind(lastValue)\n    }\n\n    return value\n  };\n\n  /**\n   * Return the value as one would get it from the top-level i.e.\n   * $data.token/$context.token/globals.token; this does not return intermediate\n   * values on a chain of members i.e. $data.hello.there -- requesting the\n   * Identifier('there').value will return $data/$context/globals.there.\n   *\n   * This will dereference using () or [arg] member.\n   * @param  {object | Identifier | Expression} parent\n   * @return {mixed}  Return the primitive or an accessor.\n   */\n  get_value (parent, context, globals, node) {\n    const intermediate = parent && !(parent instanceof Identifier)\n      ? Node.value_of(parent, context, globals, node)[this.token]\n      : context.lookup(this.token, globals, node);\n    return this.dereference(intermediate, context, globals, node)\n  }\n\n  assign (object, property, value) {\n    if (isWriteableObservable(object[property])) {\n      object[property](value);\n    } else if (!isObservable(object[property])) {\n      object[property] = value;\n    }\n  };\n\n  /**\n   * Set the value of the Identifier.\n   *\n   * @param {Mixed} new_value The value that Identifier is to be set to.\n   */\n  set_value (new_value, $context, globals) {\n    const $data = $context.$data || {};\n    const refs = this.dereferences || [];\n    let leaf = this.token;\n    let i, n, root;\n\n    if (Object.hasOwnProperty.call($data, leaf)) {\n      root = $data;\n    } else if (Object.hasOwnProperty.call($context, leaf)) {\n      root = $context;\n    } else if (Object.hasOwnProperty.call(globals, leaf)) {\n      root = globals;\n    } else {\n      throw new Error('Identifier::set_value -- ' +\n        \"The property '\" + leaf + \"' does not exist \" +\n        'on the $data, $context, or globals.')\n    }\n\n    // Degenerate case. {$data|$context|global}[leaf] = something;\n    n = refs.length;\n    if (n === 0) {\n      this.assign(root, leaf, new_value);\n      return\n    }\n\n    // First dereference is {$data|$context|global}[token].\n    root = root[leaf];\n\n    // We cannot use this.dereference because that gives the leaf; to evoke\n    // the ES5 setter we have to call `obj[leaf] = new_value`\n    for (i = 0; i < n - 1; ++i) {\n      leaf = refs[i];\n      if (leaf instanceof Arguments) {\n        root = root();\n      } else {\n        root = root[Node.value_of(leaf)];\n      }\n    }\n\n    // We indicate that a dereference is a function when it is `true`.\n    if (refs[i] === true) {\n      throw new Error('Cannot assign a value to a function.')\n    }\n\n    // Call the setter for the leaf.\n    if (refs[i]) {\n      this.assign(root, Node.value_of(refs[i]), new_value);\n    }\n  };\n\n  /**\n   * Determine if a character is a valid item in an identifier.\n   * Note that we do not check whether the first item is a number, nor do we\n   * support unicode identifiers here.\n   *\n   * From:  http://stackoverflow.com/a/9337047\n   * @param  {String}  ch  The character\n   * @return {Boolean}     True if this is a valid identifier\n   */\n  // function is_identifier_char(ch) {\n  //   return (ch >= 'A' && ch <= 'Z') ||\n  //          (ch >= 'a' && ch <= 'z') ||\n  //          (ch >= '0' && ch <= 9) ||\n  //           ch === '_' || ch === '$';\n  // }\n  static is_valid_start_char (ch) {\n    return IDStart.test(ch)\n  }\n\n  static is_valid_continue_char (ch) {\n    return IDContinue.test(ch)\n  }\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\nclass Ternary {\n  constructor (yes, no) {\n    Object.assign(this, {yes, no});\n  }\n\n  get_value () { return this }\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\n/**\n * Originally based on (public domain):\n * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js\n */\n\nconst escapee = {\n  \"'\": \"'\",\n  '\"': '\"',\n  '`': '`',\n  '\\\\': '\\\\',\n  '/': '/',\n  '$': '$',\n  b: '\\b',\n  f: '\\f',\n  n: '\\n',\n  r: '\\r',\n  t: '\\t'\n};\n\n/**\n * Construct a new Parser instance with new Parser(node, context)\n * @param {Node} node    The DOM element from which we parsed the\n *                         content.\n * @param {object} context The Knockout context.\n * @param {object} globals An object containing any desired globals.\n */\nclass Parser {\n  white () {\n    var ch = this.ch;\n    while (ch && ch <= ' ') {\n      ch = this.next();\n    }\n    return this.comment(ch)\n  }\n\n/**\n * Slurp any C or C++ style comments\n */\n  comment (ch) {\n    if (ch !== '/') { return ch }\n    var p = this.at;\n    var second = this.lookahead();\n    if (second === '/') {\n      while (ch) {\n        ch = this.next();\n        if (ch === '\\n' || ch === '\\r') { break }\n      }\n      ch = this.next();\n    } else if (second === '*') {\n      while (ch) {\n        ch = this.next();\n        if (ch === '*' && this.lookahead() === '/') {\n          this.next();\n          break\n        }\n      }\n      if (!ch) {\n        this.error('Unclosed comment, starting at character ' + p);\n      }\n      this.next();\n      return this.white()\n    }\n    return ch\n  };\n\n  next (c) {\n    if (c && c !== this.ch) {\n      this.error(\"Expected '\" + c + \"' but got '\" + this.ch + \"'\");\n    }\n    this.ch = this.text.charAt(this.at);\n    this.at += 1;\n    return this.ch\n  }\n\n  lookahead () {\n    return this.text[this.at]\n  }\n\n  error (m) {\n    if (m instanceof Error) { throw m }\n    let [name, msg] = m.name ? [m.name, m.message] : [m, ''];\n    const message = `\\n${name} ${msg} of\n    ${this.text}\\n` + Array(this.at).join(' ') + '_/ 🔥 \\\\_\\n';\n    throw new Error(message)\n  }\n\n  name () {\n  // A name of a binding\n    var name = '';\n    var enclosedBy;\n    this.white();\n\n    var ch = this.ch;\n\n    if (ch === \"'\" || ch === '\"') {\n      enclosedBy = ch;\n      ch = this.next();\n    }\n\n    while (ch) {\n      if (enclosedBy && ch === enclosedBy) {\n        this.white();\n        ch = this.next();\n        if (ch !== ':' && ch !== ',') {\n          this.error(\n          'Object name: ' + name + ' missing closing ' + enclosedBy\n        );\n        }\n        return name\n      } else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {\n        return name\n      }\n      name += ch;\n      ch = this.next();\n    }\n\n    return name\n  }\n\n  number () {\n    let number;\n    let string = '';\n    let ch = this.ch;\n\n    if (ch === '-') {\n      string = '-';\n      ch = this.next('-');\n    }\n    while (ch >= '0' && ch <= '9') {\n      string += ch;\n      ch = this.next();\n    }\n    if (ch === '.') {\n      string += '.';\n      ch = this.next();\n      while (ch && ch >= '0' && ch <= '9') {\n        string += ch;\n        ch = this.next();\n      }\n    }\n    if (ch === 'e' || ch === 'E') {\n      string += ch;\n      ch = this.next();\n      if (ch === '-' || ch === '+') {\n        string += ch;\n        ch = this.next();\n      }\n      while (ch >= '0' && ch <= '9') {\n        string += ch;\n        ch = this.next();\n      }\n    }\n    number = +string;\n    if (!isFinite(number)) {\n      options.onError(new Error('Bad number: ' + number + ' in ' + string));\n    } else {\n      return number\n    }\n  }\n\n/**\n * Add a property to 'object' that equals the given value.\n * @param  {Object} object The object to add the value to.\n * @param  {String} key    object[key] is set to the given value.\n * @param  {mixed}  value  The value, may be a primitive or a function. If a\n *                         function it is unwrapped as a property.\n */\n  objectAddValue (object, key, value) {\n    if (value && value[Node.isExpressionOrIdentifierSymbol]) {\n      Object.defineProperty(object, key, {\n        get: () => Node.value_of(value, ...this.currentContextGlobals),\n        enumerable: true\n      });\n    } else if (Array.isArray(value)) {\n      Object.defineProperty(object, key, {\n        get: () => value.map(v => Node.value_of(v, ...this.currentContextGlobals)),\n        enumerable: true\n      });\n    } else {\n    // primitives\n      object[key] = value;\n    }\n  }\n\n  object () {\n    let key;\n    let object = {};\n    let ch = this.ch;\n\n    if (ch === '{') {\n      this.next('{');\n      ch = this.white();\n      if (ch === '}') {\n        ch = this.next('}');\n        return object\n      }\n      while (ch) {\n        if (ch === '\"' || ch === \"'\" || ch === '`') {\n          key = this.string();\n        } else {\n          key = this.name();\n        }\n        this.white();\n        ch = this.next(':');\n        if (Object.hasOwnProperty.call(object, key)) {\n          this.error('Duplicate key \"' + key + '\"');\n        }\n\n        this.objectAddValue(object, key, this.expression());\n\n        ch = this.white();\n        if (ch === '}') {\n          ch = this.next('}');\n          return object\n        }\n\n        this.next(',');\n        ch = this.white();\n      }\n    }\n    this.error('Bad object');\n  }\n\n/**\n * Read up to delim and return the string\n * @param  {string} delim The delimiter, either ' or \"\n * @return {string}       The string read.\n */\n  readString (delim) {\n    let string = '';\n    let nodes = [''];\n    let plusOp = operators['+'];\n    let hex;\n    let i;\n    let uffff;\n    let interpolate = delim === '`';\n    let ch = this.next();\n\n    while (ch) {\n      if (ch === delim) {\n        ch = this.next();\n        if (interpolate) { nodes.push(plusOp); }\n        nodes.push(string);\n        return nodes\n      }\n      if (ch === '\\\\') {\n        ch = this.next();\n        if (ch === 'u') {\n          uffff = 0;\n          for (i = 0; i < 4; i += 1) {\n            hex = parseInt(ch = this.next(), 16);\n            if (!isFinite(hex)) {\n              break\n            }\n            uffff = uffff * 16 + hex;\n          }\n          string += String.fromCharCode(uffff);\n        } else if (typeof escapee[ch] === 'string') {\n          string += escapee[ch];\n        } else {\n          break\n        }\n      } else if (interpolate && ch === '$') {\n        ch = this.next();\n        if (ch === '{') {\n          this.next('{');\n          nodes.push(plusOp);\n          nodes.push(string);\n          nodes.push(plusOp);\n          nodes.push(this.expression());\n          string = '';\n        // this.next('}');\n        } else {\n          string += '$' + ch;\n        }\n      } else {\n        string += ch;\n      }\n      ch = this.next();\n    }\n\n    this.error('Bad string');\n  }\n\n  string () {\n    var ch = this.ch;\n    if (ch === '\"') {\n      return this.readString('\"').join('')\n    } else if (ch === \"'\") {\n      return this.readString(\"'\").join('')\n    } else if (ch === '`') {\n      return Node.create_root(this.readString('`'))\n    }\n\n    this.error('Bad string');\n  }\n\n  array () {\n    let array = [];\n    let ch = this.ch;\n\n    if (ch === '[') {\n      ch = this.next('[');\n      this.white();\n      if (ch === ']') {\n        ch = this.next(']');\n        return array\n      }\n      while (ch) {\n        array.push(this.expression());\n        ch = this.white();\n        if (ch === ']') {\n          ch = this.next(']');\n          return array\n        }\n        this.next(',');\n        ch = this.white();\n      }\n    }\n    this.error('Bad array');\n  }\n\n  value () {\n    var ch;\n    this.white();\n    ch = this.ch;\n    switch (ch) {\n      case '{': return this.object()\n      case '[': return this.array()\n      case '\"': case \"'\": case '`': return this.string()\n      case '-': return this.number()\n      default:\n        return ch >= '0' && ch <= '9' ? this.number() : this.identifier()\n    }\n  }\n\n/**\n * Get the function for the given operator.\n * A `.precedence` value is added to the function, with increasing\n * precedence having a higher number.\n * @return {function} The function that performs the infix operation\n */\n  operator (opts) {\n    let op = '';\n    let opFn;\n    let ch = this.white();\n    let isIdentifierChar = Identifier.is_valid_start_char;\n\n    while (ch) {\n      if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||\n        ch === '\"' || ch === \"'\" || ch === '{' || ch === '(' ||\n        ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {\n        break\n      }\n\n      if (!opts.not_an_array && ch === '[') {\n        break\n      }\n\n      op += ch;\n      ch = this.next();\n\n    // An infix followed by the prefix e.g. a + @b\n    // TODO: other prefix unary operators\n      if (ch === '@') {\n        break\n      }\n\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n\n    if (op !== '') {\n      if (opts.prefix && op === '-') { op = '&-'; }\n      opFn = operators[op];\n\n      if (!opFn) {\n        this.error(\"Bad operator: '\" + op + \"'.\");\n      }\n    }\n\n    return opFn\n  }\n\n/**\n * Filters\n * Returns what the Node interprets as an \"operator\".\n * e.g.\n *   <span data-bind=\"text: name | fit:20 | uppercase\"></span>\n */\n  filter () {\n    let ch = this.next();\n    let args = [];\n    let nextFilter = function (v) { return v };\n    let name = this.name();\n\n    if (!options.filters[name]) {\n      options.onError('Cannot find filter by the name of: ' + name);\n    }\n\n    ch = this.white();\n\n    while (ch) {\n      if (ch === ':') {\n        ch = this.next();\n        args.push(this.expression('|'));\n      }\n\n      if (ch === '|') {\n        nextFilter = this.filter();\n        break\n      }\n\n      if (ch === ',') { break }\n\n      ch = this.white();\n    }\n\n    var filter = function filter (value, ignored, context, globals, node) {\n      var argValues = [value];\n\n      for (var i = 0, j = args.length; i < j; ++i) {\n        argValues.push(Node.value_of(args[i], context, globals, node));\n      }\n\n      return nextFilter(options.filters[name].apply(null, argValues))\n    };\n\n  // Lowest precedence.\n    filter.precedence = 1;\n    return filter\n  }\n\n/**\n * Parse an expression – builds an operator tree, in something like\n * Shunting-Yard.\n *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm\n *\n * @return {function}   A function that computes the value of the expression\n *                      when called or a primitive.\n */\n  expression (filterable) {\n    let op;\n    let nodes = [];\n    let ch = this.white();\n\n    while (ch) {\n    // unary prefix operators\n      op = this.operator({ prefix: true });\n      if (op) {\n        nodes.push(undefined);  // LHS Tree node.\n        nodes.push(op);\n        ch = this.white();\n      }\n\n      if (ch === '(') {\n        this.next();\n        nodes.push(this.expression());\n        this.next(')');\n      } else {\n        nodes.push(this.value());\n      }\n      ch = this.white();\n\n      if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||\n        ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {\n        break\n      }\n\n    // filters\n      if (ch === '|' && this.lookahead() !== '|' && filterable) {\n        nodes.push(this.filter());\n        nodes.push(undefined);\n        break\n      }\n\n    // infix or postfix operators\n      op = this.operator({ not_an_array: true });\n\n      if (op === operators['?']) {\n        this.ternary(nodes);\n        break\n      } else if (op === operators['.']) {\n        nodes.push(op);\n        nodes.push(this.member());\n        op = null;\n      } else if (op === operators['[']) {\n        nodes.push(op);\n        nodes.push(this.expression());\n        ch = this.next(']');\n        op = null;\n      } else if (op) {\n        nodes.push(op);\n      }\n\n      ch = this.white();\n\n      if (ch === ']' || (!op && ch === '(')) { break }\n    }\n\n    if (nodes.length === 0) {\n      return undefined\n    }\n\n    var dereferences = this.dereferences();\n\n    if (nodes.length === 1 && !dereferences.length) {\n      return nodes[0]\n    }\n\n    for (var i = 0, j = dereferences.length; i < j; ++i) {\n      var deref = dereferences[i];\n      if (deref.constructor === Arguments) {\n        nodes.push(operators.call);\n      } else {\n        nodes.push(operators['.']);\n      }\n      nodes.push(deref);\n    }\n\n    return new Expression(nodes)\n  }\n\n  ternary (nodes) {\n    var ternary = new Ternary();\n    ternary.yes = this.expression();\n    this.next(':');\n    ternary.no = this.expression();\n    nodes.push(operators['?']);\n    nodes.push(ternary);\n  }\n\n/**\n * Parse the arguments to a function, returning an Array.\n *\n */\n  funcArguments () {\n    let args = [];\n    let ch = this.next('(');\n\n    while (ch) {\n      ch = this.white();\n      if (ch === ')') {\n        this.next(')');\n        return new Arguments(this, args)\n      } else {\n        args.push(this.expression());\n        ch = this.white();\n      }\n      if (ch !== ')') { this.next(','); }\n    }\n\n    this.error('Bad arguments to function');\n  }\n\n/**\n * The literal string reference `abc` in an `x.abc` expression.\n */\n  member () {\n    let member = '';\n    let ch = this.white();\n    let isIdentifierChar = Identifier.is_valid_start_char;\n\n    while (ch) {\n      if (!isIdentifierChar(ch)) {\n        break\n      }\n      member += ch;\n      ch = this.next();\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n    return member\n  }\n\n/**\n * A dereference applies to an identifer, being either a function\n * call \"()\" or a membership lookup with square brackets \"[member]\".\n * @return {fn or undefined}  Dereference function to be applied to the\n *                            Identifier\n */\n  dereference () {\n    let member;\n    let ch = this.white();\n\n    while (ch) {\n      if (ch === '(') {\n      // a(...) function call\n        return this.funcArguments()\n      } else if (ch === '[') {\n      // a[x] membership\n        this.next('[');\n        member = this.expression();\n        this.white();\n        this.next(']');\n\n        return member\n      } else if (ch === '.') {\n      // a.x membership\n        this.next('.');\n        return this.member()\n      } else {\n        break\n      }\n    }\n  }\n\n  dereferences () {\n    let ch = this.white();\n    let dereferences = [];\n    let deref;\n\n    while (ch) {\n      deref = this.dereference();\n      if (deref !== undefined) {\n        dereferences.push(deref);\n      } else {\n        break\n      }\n    }\n    return dereferences\n  }\n\n  identifier () {\n    let token = '';\n    let isIdentifierChar = Identifier.is_valid_start_char;\n    let ch = this.white();\n\n    while (ch) {\n      if (!isIdentifierChar(ch)) {\n        break\n      }\n      token += ch;\n      ch = this.next();\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n    switch (token) {\n      case 'true': return true\n      case 'false': return false\n      case 'null': return null\n      case 'undefined': return void 0\n      case 'function':\n        throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.')\n    // return this.anonymous_fn();\n    }\n    return new Identifier(this, token, this.dereferences())\n  }\n\n  readBindings () {\n    let key;\n    let bindings = {};\n    let sep;\n    let expr;\n    let ch = this.ch;\n\n    while (ch) {\n      key = this.name();\n      sep = this.white();\n\n      if (!sep || sep === ',') {\n        if (sep) {\n          ch = this.next(',');\n        } else {\n          ch = '';\n        }\n      // A \"bare\" binding e.g. \"text\"; substitute value of 'null'\n      // so it becomes \"text: null\".\n        bindings[key] = null;\n      } else {\n        if (key.indexOf('.') !== -1) {\n        // Namespaced – i.e.\n        //    `attr.css: x` becomes `attr: { css: x }`\n        //     ^^^ - key\n          key = key.split('.');\n          bindings[key[0]] = bindings[key[0]] || {};\n\n          if (key.length !== 2) {\n            options.onError('Binding ' + key + ' should have two parts (a.b).');\n          } else if (bindings[key[0]].constructor !== Object) {\n            options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');\n          }\n\n          ch = this.next(':');\n          this.objectAddValue(bindings[key[0]], key[1], this.expression(true));\n        } else {\n          ch = this.next(':');\n          if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {\n          // Extend a namespaced bindings e.g. we've previously seen\n          // on.x, now we're seeing on: { 'abc' }.\n            expr = this.expression(true);\n            if (typeof expr !== 'object' || expr.constructor !== Object) {\n              options.onError('Expected plain object for ' + key + ' value.');\n            } else {\n              extend(bindings[key], expr);\n            }\n          } else {\n            bindings[key] = this.expression(true);\n          }\n        }\n\n        this.white();\n        if (this.ch) {\n          ch = this.next(',');\n        } else {\n          ch = '';\n        }\n      }\n    }\n    return bindings\n  }\n\n  valueAsAccessor (value, context, globals, node) {\n    if (!value) { return () => value }\n    if (typeof value === 'function') { return value }\n\n    if (value[Node.isExpressionOrIdentifierSymbol]) {\n      return () => Node.value_of(value, context, globals, node)\n    }\n\n    if (Array.isArray(value)) {\n      return () => value.map(v => Node.value_of(v, context, globals, node))\n    }\n\n    if (typeof (value) !== 'function') {\n      return () => clonePlainObjectDeep(value)\n    }\n\n    throw new Error('Value has cannot be converted to accessor: ' + value)\n  }\n\n  /**\n  * Convert result[name] from a value to a function (i.e. `valueAccessor()`)\n  * @param  {object} result [Map of top-level names to values]\n  * @return {object}        [Map of top-level names to functions]\n  *\n  * Accessors may be one of (below) constAccessor, identifierAccessor,\n  * expressionAccessor, or nodeAccessor.\n  */\n  convertToAccessors (result, context, globals, node) {\n    objectForEach(result, (name, value) => {\n      if (value instanceof Identifier) {\n        // Return a function that, with no arguments returns\n        // the value of the identifier, otherwise sets the\n        // value of the identifier to the first given argument.\n        Object.defineProperty(result, name, {\n          value: function (optionalValue, options$$1) {\n            const currentValue = value.get_value(undefined, context, globals, node);\n            if (arguments.length === 0) { return currentValue }\n            const unchanged = optionalValue === currentValue;\n            if (options$$1 && options$$1.onlyIfChanged && unchanged) { return }\n            return value.set_value(optionalValue, context, globals)\n          }\n        });\n      } else {\n        result[name] = this.valueAsAccessor(value, context, globals, node);\n      }\n    });\n    return result\n  }\n\n  runParse (source, fn) {\n    this.text = (source || '').trim();\n    this.at = 0;\n    this.ch = ' ';\n\n    try {\n      var result = fn();\n      this.white();\n      if (this.ch) {\n        this.error('Syntax Error');\n      }\n      return result\n    } catch (e) {\n      options.onError(e);\n    }\n  }\n\n  /**\n   * Get the bindings as name: accessor()\n   * @param  {string} source The binding string to parse.\n   * @return {object}        Map of name to accessor function.\n   */\n  parse (source, context = {}, globals = {}, node) {\n    if (!source) { return () => null }\n    this.currentContextGlobals = [context, globals, node];\n    const parseFn = () => this.readBindings();\n    const bindingAccessors = this.runParse(source, parseFn);\n    return this.convertToAccessors(bindingAccessors, context, globals, node)\n  }\n\n  /**\n   * Return a function that evaluates and returns the result of the expression.\n   */\n  parseExpression (source, context = {}, globals = {}, node) {\n    if (!source) { return () => '' }\n    this.currentContextGlobals = [context, globals, node];\n    const parseFn = () => this.expression(true);\n    const bindingAccessors = this.runParse(source, parseFn);\n    return this.valueAsAccessor(bindingAccessors, context, globals, node)\n  }\n}\n\n/* eslint no-cond-assign: 0 */\n\n// The following regular expressions will be used to split an object-literal string into tokens\n\n// These two match strings, either with double quotes or single quotes\nvar stringDouble = '\"(?:[^\"\\\\\\\\]|\\\\\\\\.)*\"';\nvar stringSingle = \"'(?:[^'\\\\\\\\]|\\\\\\\\.)*'\";\nvar stringRegexp = '/(?:[^/\\\\\\\\]|\\\\\\\\.)*/\\w*';\nvar specials = ',\"\\'{}()/:[\\\\]';\nvar everyThingElse = '[^\\\\s:,/][^' + specials + ']*[^\\\\s' + specials + ']';\nvar oneNotSpace = '[^\\\\s]';\nvar bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');\nvar divisionLookBehind = /[\\])\"'A-Za-z0-9_$]+$/;\nvar keywordRegexLookBehind = {\n    'in': 1,\n    'return': 1,\n    'typeof': 1\n  };\n\n/**\n * Break a binding string (data-bind='x: val, y: ..') into a stable array\n * of {key: value}.\n */\nfunction parseObjectLiteral(objectLiteralString) {\n  // Trim leading and trailing spaces from the string\n  var str = stringTrim(objectLiteralString);\n\n  // Trim braces '{' surrounding the whole object literal\n  if (str.charCodeAt(0) === 123) str = str.slice(1, -1);\n\n  // Split into tokens\n  var result = [],\n    toks = str.match(bindingToken),\n    key, values = [],\n    depth = 0;\n\n  if (!toks) { return [] }\n\n  // Append a comma so that we don't need a separate code block to deal with the last item\n  toks.push(',');\n\n  for (var i = 0, tok; tok = toks[i]; ++i) {\n    var c = tok.charCodeAt(0);\n    // A comma signals the end of a key/value pair if depth is zero\n    if (c === 44) { // \",\"\n      if (depth <= 0) {\n        result.push((key && values.length) ? {\n          key: key,\n          value: values.join('')\n        } : {\n          'unknown': key || values.join('')\n        });\n        key = depth = 0;\n        values = [];\n        continue;\n      }\n      // Simply skip the colon that separates the name and value\n    } else if (c === 58) { // \":\"\n      if (!depth && !key && values.length === 1) {\n        key = values.pop();\n        continue;\n      }\n      // A set of slashes is initially matched as a regular expression, but could be division\n    } else if (c === 47 && i && tok.length > 1) { // \"/\"\n      // Look at the end of the previous token to determine if the slash is actually division\n      var match = toks[i - 1].match(divisionLookBehind);\n      if (match && !keywordRegexLookBehind[match[0]]) {\n        // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)\n        str = str.substr(str.indexOf(tok) + 1);\n        toks = str.match(bindingToken);\n        toks.push(',');\n        i = -1;\n        // Continue with just the slash\n        tok = '/';\n      }\n      // Increment depth for parentheses, braces, and brackets so that interior commas are ignored\n    } else if (c === 40 || c === 123 || c === 91) { // '(', '{', '['\n      ++depth;\n    } else if (c === 41 || c === 125 || c === 93) { // ')', '}', ']'\n      --depth;\n      // The key will be the first token; if it's a string, trim the quotes\n    } else if (!key && !values.length && (c === 34 || c === 39)) { // '\"', \"'\"\n      tok = tok.slice(1, -1);\n    }\n    values.push(tok);\n  }\n\n  return result;\n}\n\nexport { Parser, Identifier, Arguments, Node, parseObjectLiteral };\n//# sourceMappingURL=tko.utils.parser.es6.js.map\n","import { options } from 'tko.utils';\n\nclass BindingHandlerObject {\n  set (nameOrObject, value) {\n    if (typeof nameOrObject === 'string') {\n      this[nameOrObject] = value;\n    } else if (typeof nameOrObject === 'object') {\n      if (value !== undefined) {\n        options.onError(\n          new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));\n      }\n      Object.assign(this, nameOrObject);\n    } else {\n      options.onError(\n        new Error('Given a bad binding handler type: ' + nameOrObject));\n    }\n  }\n\n  /**\n   * The handler may have a `.` in it, e.g. `attr.title`, in which case the\n   * handler is `attr`.  Otherwise it's the name given\n   */\n  get (nameOrDotted) {\n    const [name] = nameOrDotted.split('.');\n    return this[name]\n  }\n}\n\nclass Provider {\n  constructor (params = {}) {\n    if (this.constructor === Provider) {\n      throw new Error('Provider is an abstract base class.')\n    }\n    if (!('FOR_NODE_TYPES' in this)) {\n      // FOR_NODE_TYPES must return a list of integers corresponding to the\n      // node.nodeType's that the provider handles.\n      throw new Error('Providers must have FOR_NODE_TYPES property')\n    }\n    this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();\n    this.globals = params.globals || {};\n  }\n\n  nodeHasBindings (/* node */) {}\n  getBindingAccessors (/* node, context */) {}\n  preprocessNode (/* node */) {}\n  postProcess (/* node */) {}\n}\n\nexport { Provider };\n//# sourceMappingURL=tko.provider.es6.js.map\n","import { Parser, parseObjectLiteral } from 'tko.utils.parser';\nimport { Provider } from 'tko.provider';\n\n/**\n * BindingStringProvider is an abstract base class parses a binding string.\n *\n * Children must implement `nodeHasBindings` and `getBindingString`.\n */\nclass BindingStringProvider extends Provider {\n  /** Call bindingHandler.preprocess on each respective binding string.\n   *\n   * The `preprocess` property of bindingHandler must be a static\n   * function (i.e. on the object or constructor).\n   */\n  * processBinding (key, value) {\n    // Get the \"on\" binding from \"on.click\"\n    const [handlerName, property] = key.split('.');\n    const handler = this.bindingHandlers.get(handlerName);\n\n    if (handler && handler.preprocess) {\n      const bindingsAddedByHandler = [];\n      const chainFn = (...args) => bindingsAddedByHandler.push(args);\n      value = handler.preprocess(value, key, chainFn);\n      for (const [key, value] of bindingsAddedByHandler) {\n        yield * this.processBinding(key, value);\n      }\n    } else if (property) {\n      value = `{${property}:${value}}`;\n    }\n\n    yield `${handlerName}:${value}`;\n  }\n\n  * generateBindingString (bindingString) {\n    for (const {key, unknown, value} of parseObjectLiteral(bindingString)) {\n      yield * this.processBinding(key || unknown, value);\n    }\n  }\n\n  preProcessBindings (bindingString) {\n    return Array.from(this.generateBindingString(bindingString)).join(',')\n  }\n\n  getBindingAccessors (node, context) {\n    const bindingString = node && this.getBindingString(node);\n    if (!bindingString) { return }\n    const processed = this.preProcessBindings(bindingString);\n    return new Parser().parse(processed, context, this.globals, node)\n  }\n\n  getBindingString () { throw new Error('Overload getBindingString.') }\n}\n\nexport { BindingStringProvider };\n//# sourceMappingURL=tko.provider.bindingString.es6.js.map\n","import { virtualElements } from 'tko.utils';\nimport { BindingStringProvider } from 'tko.provider.bindingString';\n\nclass VirtualProvider extends BindingStringProvider {\n  get FOR_NODE_TYPES () { return [ 8 ] } // document.COMMENT_NODE\n\n  getBindingString (node) {\n    if (node.nodeType === document.COMMENT_NODE) {\n      return virtualElements.virtualNodeBindingValue(node)\n    }\n  }\n\n  nodeHasBindings (node) {\n    if (node.nodeType === document.COMMENT_NODE) {\n      return virtualElements.isStartComment(node)\n    }\n  }\n}\n\nexport { VirtualProvider };\n//# sourceMappingURL=tko.provider.virtual.es6.js.map\n","import { BindingStringProvider } from 'tko.provider.bindingString';\n\nclass DataBindProvider extends BindingStringProvider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  get BIND_ATTRIBUTE () {\n    return 'data-bind'\n  }\n\n  getBindingString (node) {\n    if (node.nodeType === document.ELEMENT_NODE) {\n      return node.getAttribute(this.BIND_ATTRIBUTE)\n    }\n  }\n\n  nodeHasBindings (node) {\n    if (node.nodeType === document.ELEMENT_NODE) {\n      return node.hasAttribute(this.BIND_ATTRIBUTE)\n    }\n  }\n}\n\nexport { DataBindProvider };\n//# sourceMappingURL=tko.provider.databind.es6.js.map\n","import { addDisposeCallback, createSymbolOrString } from 'tko.utils';\nimport { computed } from 'tko.computed';\n\n'use strict';\n\nconst SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');\nconst ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');\n\nclass LifeCycle {\n  // NOTE: For more advanced integration as an ES6 mixin, see e.g.:\n  // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/\n\n  /**\n   * Copy the properties of the LifeCycle class to the target (or its prototype)\n   *\n   * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.\n   */\n  static mixInto (Constructor) {\n    const target = Constructor.prototype || Constructor;\n    const mixin = LifeCycle.prototype;\n    for (let prop of Object.getOwnPropertyNames(mixin)) {\n      target[prop] = mixin[prop];\n    }\n  }\n\n  subscribe (observable, action) {\n    if (typeof action === 'string') { action = this[action].bind(this); }\n    this.addDisposable(observable.subscribe(action));\n  }\n\n  computed (params) {\n    if (typeof params === 'string') {\n      params = { read: this[params], write: this[params], owner: this };\n    } else if (typeof params === 'object') {\n      // Pass directly.\n    } else if (typeof params === 'function') {\n      params = { read: params, write: params };\n    } else {\n      throw new Error('LifeCycle::computed not given a valid type.')\n    }\n\n    params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];\n    return this.addDisposable(computed(params))\n  }\n\n  /**\n   * Add an event listener for the given or anchored node.\n   * @param {node} [node] (optional) The target node (otherwise the anchored node)\n   * @param {string} [type] Event type\n   * @param {function|string} [action] Either call the given function or `this[action]`\n   * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`\n   */\n  addEventListener (...args) {\n    const node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];\n    const [type, act, options] = args;\n    const handler = typeof act === 'string' ? this[act].bind(this) : act;\n    this.__addEventListener(node, type, handler, options);\n  }\n\n  __addEventListener (node, eventType, handler, options) {\n    node.addEventListener(eventType, handler, options);\n    function dispose () { node.removeEventListener(eventType, handler); }\n    addDisposeCallback(node, dispose);\n    this.addDisposable({ dispose });\n  }\n\n  anchorTo (node) {\n    addDisposeCallback(node, () => this.dispose());\n    this[ANCHOR_NODE] = node;\n  }\n\n  dispose () {\n    const subscriptions = this[SUBSCRIPTIONS] || [];\n    subscriptions.forEach(s => s.dispose());\n    this[SUBSCRIPTIONS] = [];\n    this[ANCHOR_NODE] = null;\n  }\n\n  addDisposable (subscription) {\n    const subscriptions = this[SUBSCRIPTIONS] || [];\n    if (!this[SUBSCRIPTIONS]) { this[SUBSCRIPTIONS] = subscriptions; }\n    if (typeof subscription.dispose !== 'function') {\n      throw new Error('Lifecycle::addDisposable argument missing `dispose`.')\n    }\n    subscriptions.push(subscription);\n    return subscription\n  }\n}\n\nexport { LifeCycle };\n//# sourceMappingURL=tko.lifecycle.es6.js.map\n","import { dependencyDetection, subscribable } from 'tko.observable';\nimport { cloneNodes, getObjectOwnProperty, isDocumentFragment, isDomElement, makeArray, parseHtmlFragment, tagNameLower, tasks } from 'tko.utils';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar loadingSubscribablesCache = {};\nvar loadedDefinitionsCache = {};    // Tracks component loads that have already completed\n\nfunction loadComponentAndNotify(componentName, callback) {\n    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),\n        completedAsync;\n    if (!_subscribable) {\n        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.\n        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();\n        _subscribable.subscribe(callback);\n\n        beginLoadingComponent(componentName, function(definition, config) {\n            var isSynchronousComponent = !!(config && config.synchronous);\n            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };\n            delete loadingSubscribablesCache[componentName];\n\n            // For API consistency, all loads complete asynchronously. However we want to avoid\n            // adding an extra task schedule if it's unnecessary (i.e., the completion is already\n            // async).\n            //\n            // You can bypass the 'always asynchronous' feature by putting the synchronous:true\n            // flag on your component configuration when you register it.\n            if (completedAsync || isSynchronousComponent) {\n                // Note that notifySubscribers ignores any dependencies read within the callback.\n                // See comment in loaderRegistryBehaviors.js for reasoning\n                _subscribable.notifySubscribers(definition);\n            } else {\n                tasks.schedule(function() {\n                    _subscribable.notifySubscribers(definition);\n                });\n            }\n        });\n        completedAsync = true;\n    } else {\n        _subscribable.subscribe(callback);\n    }\n}\n\nfunction beginLoadingComponent(componentName, callback) {\n    getFirstResultFromLoaders('getConfig', [componentName], function(config) {\n        if (config) {\n            // We have a config, so now load its definition\n            getFirstResultFromLoaders('loadComponent', [componentName, config], function(definition) {\n                callback(definition, config);\n            });\n        } else {\n            // The component has no config - it's unknown to all the loaders.\n            // Note that this is not an error (e.g., a module loading error) - that would abort the\n            // process and this callback would not run. For this callback to run, all loaders must\n            // have confirmed they don't know about this component.\n            callback(null, null);\n        }\n    });\n}\n\nfunction getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {\n    // On the first call in the stack, start with the full set of loaders\n    if (!candidateLoaders) {\n        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array\n    }\n\n    // Try the next candidate\n    var currentCandidateLoader = candidateLoaders.shift();\n    if (currentCandidateLoader) {\n        var methodInstance = currentCandidateLoader[methodName];\n        if (methodInstance) {\n            var wasAborted = false,\n                synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {\n                    if (wasAborted) {\n                        callback(null);\n                    } else if (result !== null) {\n                        // This candidate returned a value. Use it.\n                        callback(result);\n                    } else {\n                        // Try the next candidate\n                        getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n                    }\n                }));\n\n            // Currently, loaders may not return anything synchronously. This leaves open the possibility\n            // that we'll extend the API to support synchronous return values in the future. It won't be\n            // a breaking change, because currently no loader is allowed to return anything except undefined.\n            if (synchronousReturnValue !== undefined) {\n                wasAborted = true;\n\n                // Method to suppress exceptions will remain undocumented. This is only to keep\n                // KO's specs running tidily, since we can observe the loading got aborted without\n                // having exceptions cluttering up the console too.\n                if (!currentCandidateLoader.suppressLoaderExceptions) {\n                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');\n                }\n            }\n        } else {\n            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.\n            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n        }\n    } else {\n        // No candidates returned a value\n        callback(null);\n    }\n}\n\nvar registry = {\n  get (componentName, callback) {\n    var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);\n    if (cachedDefinition) {\n      // It's already loaded and cached. Reuse the same definition object.\n      // Note that for API consistency, even cache hits complete asynchronously by default.\n      // You can bypass this by putting synchronous:true on your component config.\n      if (cachedDefinition.isSynchronousComponent) {\n        dependencyDetection.ignore(function() { // See comment in loaderRegistryBehaviors.js for reasoning\n            callback(cachedDefinition.definition);\n        });\n      } else {\n        tasks.schedule(function() { callback(cachedDefinition.definition); });\n      }\n    } else {\n      // Join the loading process that is already underway, or start a new one.\n      loadComponentAndNotify(componentName, callback);\n    }\n  },\n\n  clearCachedDefinition (componentName) {\n    delete loadedDefinitionsCache[componentName];\n  },\n\n  _getFirstResultFromLoaders: getFirstResultFromLoaders,\n\n  loaders: []\n};\n\n// The default loader is responsible for two things:\n// 1. Maintaining the default in-memory registry of component configuration objects\n//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))\n// 2. Answering requests for components by fetching configuration objects\n//    from that default in-memory registry and resolving them into standard\n//    component definition objects (of the form { createViewModel: ..., template: ... })\n// Custom loaders may override either of these facilities, i.e.,\n// 1. To supply configuration objects from some other source (e.g., conventions)\n// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.\n\nvar defaultConfigRegistry = {};\n\nfunction register(componentName, config) {\n    if (!config) {\n        throw new Error('Invalid configuration for ' + componentName);\n    }\n\n    if (isRegistered(componentName)) {\n        throw new Error('Component ' + componentName + ' is already registered');\n    }\n\n    defaultConfigRegistry[componentName] = config;\n}\n\nfunction isRegistered(componentName) {\n    return defaultConfigRegistry.hasOwnProperty(componentName);\n}\n\nfunction unregister(componentName) {\n    delete defaultConfigRegistry[componentName];\n    registry.clearCachedDefinition(componentName);\n}\n\nvar defaultLoader = {\n    getConfig: function(componentName, callback) {\n        var result = defaultConfigRegistry.hasOwnProperty(componentName)\n            ? defaultConfigRegistry[componentName]\n            : null;\n        callback(result);\n    },\n\n    loadComponent: function(componentName, config, callback) {\n        var errorCallback = makeErrorCallback(componentName);\n        possiblyGetConfigFromAmd(errorCallback, config, function(loadedConfig) {\n            resolveConfig(componentName, errorCallback, loadedConfig, callback);\n        });\n    },\n\n    loadTemplate: function(componentName, templateConfig, callback) {\n        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);\n    },\n\n    loadViewModel: function(componentName, viewModelConfig, callback) {\n        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);\n    }\n};\n\nvar createViewModelKey = 'createViewModel';\n\n// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it\n// into the standard component definition format:\n//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.\n// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed\n// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,\n// so this is implemented manually below.\nfunction resolveConfig(componentName, errorCallback, config, callback) {\n    var result = {},\n        makeCallBackWhenZero = 2,\n        tryIssueCallback = function() {\n            if (--makeCallBackWhenZero === 0) {\n                callback(result);\n            }\n        },\n        templateConfig = config['template'],\n        viewModelConfig = config['viewModel'];\n\n    if (templateConfig) {\n        possiblyGetConfigFromAmd(errorCallback, templateConfig, function(loadedConfig) {\n            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function(resolvedTemplate) {\n                result['template'] = resolvedTemplate;\n                tryIssueCallback();\n            });\n        });\n    } else {\n        tryIssueCallback();\n    }\n\n    if (viewModelConfig) {\n        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function(loadedConfig) {\n            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function(resolvedViewModel) {\n                result[createViewModelKey] = resolvedViewModel;\n                tryIssueCallback();\n            });\n        });\n    } else {\n        tryIssueCallback();\n    }\n}\n\nfunction resolveTemplate(errorCallback, templateConfig, callback) {\n    if (typeof templateConfig === 'string') {\n        // Markup - parse it\n        callback(parseHtmlFragment(templateConfig));\n    } else if (templateConfig instanceof Array) {\n        // Assume already an array of DOM nodes - pass through unchanged\n        callback(templateConfig);\n    } else if (isDocumentFragment(templateConfig)) {\n        // Document fragment - use its child nodes\n        callback(makeArray(templateConfig.childNodes));\n    } else if (templateConfig['element']) {\n        var element = templateConfig['element'];\n        if (isDomElement(element)) {\n            // Element instance - copy its child nodes\n            callback(cloneNodesFromTemplateSourceElement(element));\n        } else if (typeof element === 'string') {\n            // Element ID - find it, then copy its child nodes\n            var elemInstance = document.getElementById(element);\n            if (elemInstance) {\n                callback(cloneNodesFromTemplateSourceElement(elemInstance));\n            } else {\n                errorCallback('Cannot find element with ID ' + element);\n            }\n        } else {\n            errorCallback('Unknown element type: ' + element);\n        }\n    } else {\n        errorCallback('Unknown template value: ' + templateConfig);\n    }\n}\n\nfunction resolveViewModel(errorCallback, viewModelConfig, callback) {\n    if (typeof viewModelConfig === 'function') {\n        // Constructor - convert to standard factory function format\n        // By design, this does *not* supply componentInfo to the constructor, as the intent is that\n        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only\n        // be used in factory functions, not viewmodel constructors.\n        callback(function (params /*, componentInfo */) {\n            return new viewModelConfig(params);\n        });\n    } else if (typeof viewModelConfig[createViewModelKey] === 'function') {\n        // Already a factory function - use it as-is\n        callback(viewModelConfig[createViewModelKey]);\n    } else if ('instance' in viewModelConfig) {\n        // Fixed object instance - promote to createViewModel format for API consistency\n        var fixedInstance = viewModelConfig['instance'];\n        callback(function (/* params, componentInfo */) {\n            return fixedInstance;\n        });\n    } else if ('viewModel' in viewModelConfig) {\n        // Resolved AMD module whose value is of the form { viewModel: ... }\n        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);\n    } else {\n        errorCallback('Unknown viewModel value: ' + viewModelConfig);\n    }\n}\n\nfunction cloneNodesFromTemplateSourceElement(elemInstance) {\n    switch (tagNameLower(elemInstance)) {\n    case 'script':\n        return parseHtmlFragment(elemInstance.text);\n    case 'textarea':\n        return parseHtmlFragment(elemInstance.value);\n    case 'template':\n        // For browsers with proper <template> element support (i.e., where the .content property\n        // gives a document fragment), use that document fragment.\n        if (isDocumentFragment(elemInstance.content)) {\n            return cloneNodes(elemInstance.content.childNodes);\n        }\n    }\n\n    // Regular elements such as <div>, and <template> elements on old browsers that don't really\n    // understand <template> and just treat it as a regular container\n    return cloneNodes(elemInstance.childNodes);\n}\n\n\nfunction possiblyGetConfigFromAmd(errorCallback, config, callback) {\n    if (typeof config.require === 'string') {\n        // The config is the value of an AMD module\n        if (window.amdRequire || window.require) {\n            (window.amdRequire || window.require)([config.require], callback);\n        } else {\n            errorCallback('Uses require, but no AMD loader is present');\n        }\n    } else {\n        callback(config);\n    }\n}\n\nfunction makeErrorCallback(componentName) {\n    return function (message) {\n        throw new Error('Component \\'' + componentName + '\\': ' + message);\n    };\n}\n\n\n// By default, the default loader is the only registered component loader\nregistry.loaders.push(defaultLoader);\n\n/**\n * Component --- Abstract Base Class\n *\n * This simplifies and compartmentalizes Components.  Use this:\n *\n *    class CompX extends ComponentABC {\n *    \tstatic get element () { return 'comp-x-id' }\n *    \tstatic get sync () { return false }\n *    \tstatic get elementName () { return 'comp-x' }\n *    }\n *    CompX.register()\n *\n * instead of:\n *\n *   class CompX {}\n *   \n *   ko.components.register('comp-x', {\n *     viewModel: CompX,\n *     synchronous: false,\n *     template: { element: 'comp-x' }\n *   })\n *\n * As well, gain all the benefits of a LifeCycle, namely automated\n * event and subscription addition/removal.\n * \n * NOTE: A Component created this way can add events to the component node\n * with `this.addEventListener(type, action)`.\n */\nclass ComponentABC extends LifeCycle {\n\t/**\n\t * @return {string} The custom node name of this component.\n\t */\n\tstatic get elementName () {\n\t\tthrow new Error(\"[ComponentABC] `elementName` must be overloaded.\")\t\n\t}\n\n\t/**\n\t * Overload this to return:\n\t * 1. A string of markup\n\t * 2. An array of DOM nodes\n\t * 3. A document fragment\n\t * 4. An AMD module (with `{require: 'some/template'}`)\n\t * @return {mixed} One of the accepted template types for the ComponentBinding.\n\t */\n\tstatic get template () { return { element: this.element } }\n\n\t/**\n\t * This is called by the default `template`.  Overload this to return:\n\t * 1. The element ID\n\t * 2. A DOM node itself\n\t * @return {string|HTMLElement} either the element ID or actual element.\n\t */\n\tstatic get element () {\n\t\tthrow new Error(\"[ComponentABC] `element` must be overloaded.\")\n\t}\n\n\t/**\n\t * @return {bool} True if the component shall load synchronously\n\t */\n\tstatic get sync () { return true }\n\n\tstatic register (name = this.elementName) {\n\t\tconst viewModel = this;\n\t\tconst {template} = this;\n\t\tconst synchronous = this.sync;\n\t\tregister(name, { viewModel, template, synchronous });\n\t}\n}\n\nvar index = {\n  ComponentABC,\n  // -- Registry --\n  get: registry.get,\n  clearCachedDefinition: registry.clearCachedDefinition,\n\n  // -- Loader --\n  register,\n  isRegistered,\n  unregister,\n  defaultLoader,\n  // \"Privately\" expose the underlying config registry for use in old-IE shim\n  _allRegisteredComponents: defaultConfigRegistry,\n\n  get loaders () { return registry.loaders },\n  set loaders (loaders) { registry.loaders = loaders; }\n};\n\nexport default index;\n//# sourceMappingURL=tko.utils.component.es6.js.map\n","import { objectMap, tagNameLower } from 'tko.utils';\nimport registry from 'tko.utils.component';\nimport { isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed } from 'tko.computed';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\nclass ComponentProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  nodeHasBindings (node) {\n    return Boolean(this.getComponentNameForNode(node))\n  }\n\n  getBindingAccessors (node, context) {\n    const componentName = this.getComponentNameForNode(node);\n    if (!componentName) { return }\n    const component = () => ({\n      name: componentName,\n      params: this.getComponentParams(node, context)\n    });\n    return { component }\n  }\n\n  getComponentNameForNode (node) {\n    if (node.nodeType !== node.ELEMENT_NODE) { return }\n    const tagName = tagNameLower(node);\n    if (registry.isRegistered(tagName)) {\n      const hasDash = tagName.includes('-');\n      const isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';\n      if (hasDash || isUnknownEntity) { return tagName }\n    }\n  }\n\n  getComponentParams (node, context) {\n    const parser = new Parser(node, context, this.globals);\n    const paramsString = (node.getAttribute('params') || '').trim();\n    const accessors = parser.parse(paramsString, context, node);\n    if (!accessors || Object.keys(accessors).length === 0) {\n      return { $raw: {} }\n    }\n    const $raw = objectMap(accessors,\n      (value) => computed(value, null, { disposeWhenNodeIsRemoved: node })\n    );\n    const params = objectMap($raw, (v) => this.makeParamValue(node, v));\n    return Object.assign({ $raw }, params)\n  }\n\n  makeParamValue (node, paramValueComputed) {\n    const paramValue = paramValueComputed.peek();\n    // Does the evaluation of the parameter value unwrap any observables?\n    if (!paramValueComputed.isActive()) {\n      // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.\n      // Example: \"someVal: firstName, age: 123\" (whether or not firstName is an observable/computed)\n      return paramValue\n    }\n    // Yes it does. Supply a computed property that unwraps both the outer (binding expression)\n    // level of observability, and any inner (resulting model value) level of observability.\n    // This means the component doesn't have to worry about multiple unwrapping. If the value is a\n    // writable observable, the computed will also be writable and pass the value on to the observable.\n    const isWriteable = isWriteableObservable(paramValue);\n\n    return computed({\n      read: () => unwrap(paramValueComputed()),\n      write: isWriteable ? (v) => paramValueComputed()(v) : null,\n      disposeWhenNodeIsRemoved: node\n    })\n  }\n}\n\nexport { ComponentProvider };\n//# sourceMappingURL=tko.provider.component.es6.js.map\n","import { Provider } from 'tko.provider';\n\n/**\n * Convert attributes with ko-* to bindings.\n *\n * e.g.\n * <div ko-visible='value'></div>\n */\nclass AttrProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  get PREFIX () { return 'ko-' }\n\n  getBindingAttributesList (node) {\n    if (!node.hasAttributes()) { return [] }\n    return Array.from(node.attributes)\n      .filter(attr => attr.name.startsWith(this.PREFIX))\n  }\n\n  nodeHasBindings (node) {\n    return this.getBindingAttributesList(node).length > 0\n  }\n\n  getBindingAccessors (node, context) {\n    return Object.assign({}, ...this.handlersFromAttributes(node, context))\n  }\n\n  * handlersFromAttributes (node, context) {\n    for (const attr of this.getBindingAttributesList(node)) {\n      const name = attr.name.substr(this.PREFIX.length);\n      yield {[name]: () => this.getValue(attr.value, context, node)};\n    }\n  }\n\n  getValue (token, $context, node) {\n    /* FIXME: This duplicates Identifier.prototype.lookup_value; it should\n       be refactored into e.g. a BindingContext method */\n    if (!token) { return }\n    const $data = $context.$data;\n\n    switch (token) {\n      case '$element': return node\n      case '$context': return $context\n      case 'this': case '$data': return $context.$data\n    }\n\n    if ($data instanceof Object && token in $data) { return $data[token] }\n    if (token in $context) { return $context[token] }\n    if (token in this.globals) { return this.globals[token] }\n\n    throw new Error(`The variable '${token} not found.`)\n  }\n}\n\nexport { AttrProvider as AttributeProvider };\n//# sourceMappingURL=tko.provider.attr.es6.js.map\n","import { Provider } from 'tko.provider';\n\nclass MultiProvider extends Provider {\n  get FOR_NODE_TYPES () { return this.nodeTypes }\n\n  constructor (params = {}) {\n    super(params);\n    const providers = params.providers || [];\n    this.nodeTypeMap = {};\n    this.nodeTypes = [];\n    this.providers = [];\n    providers.forEach(p => this.addProvider(p));\n  }\n\n  addProvider (provider) {\n    this.providers.push(provider);\n    provider.bindingHandlers = this.bindingHandlers;\n    provider.globals = this.globals;\n    const nodeTypeMap = this.nodeTypeMap;\n    for (const nodeType of provider.FOR_NODE_TYPES) {\n      if (!nodeTypeMap[nodeType]) { nodeTypeMap[nodeType] = []; }\n      nodeTypeMap[nodeType].push(provider);\n    }\n    this.nodeTypes = Object.keys(this.nodeTypeMap).map(k => parseInt(k, 10));\n  }\n\n  providersFor (node) {\n    return this.nodeTypeMap[node.nodeType] || []\n  }\n\n  nodeHasBindings (node) {\n    return this.providersFor(node).some(p => p.nodeHasBindings(node))\n  }\n\n  preprocessNode (node) {\n    for (const provider of this.providersFor(node)) {\n      const newNodes = provider.preprocessNode(node);\n      if (newNodes) { return newNodes }\n    }\n  }\n\n  * enumerateProviderBindings (node, ctx) {\n    for (const provider of this.providersFor(node)) {\n      const bindings = provider.getBindingAccessors(node, ctx) || {};\n      for (const [key, accessor] of Object.entries(bindings || {})) {\n        yield [key, accessor];\n      }\n    }\n  }\n\n  getBindingAccessors (node, ctx) {\n    node = this.preprocessNode(node) || node;\n    const bindings = {};\n    for (const [key, accessor] of this.enumerateProviderBindings(node, ctx)) {\n      if (key in bindings) {\n        throw new Error(`The binding \"${key}\" is duplicated by multiple providers`)\n      }\n      bindings[key] = accessor;\n    }\n    return bindings\n  }\n}\n\nexport { MultiProvider };\n//# sourceMappingURL=tko.provider.multi.es6.js.map\n","import { unwrap } from 'tko.observable';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\nconst INNER_EXPRESSION = /^([\\s\\S]*)}}([\\s\\S]*?)\\{\\{([\\s\\S]*)$/;\nconst OUTER_EXPRESSION = /^([\\s\\S]*?)\\{\\{([\\s\\S]*)}}([\\s\\S]*)$/;\nconst BINDING_EXPRESSION = /^([^,\"'{}()/:[\\]\\s]+)\\s+([^\\s:].*)/;\n\nclass Interpolated {\n  constructor (text) {\n    this.text = text;\n  }\n\n  trim (string) {\n    return string === null ? '' : string.trim()\n  }\n}\n\nclass Expression extends Interpolated {\n  asAttr (context, globals, node) {\n    return new Parser().parseExpression(this.text, context, globals, node)()\n  }\n\n  * textNodeReplacement (textNode) {\n    const text = this.trim(this.text);\n    const ownerDocument = textNode ? textNode.ownerDocument : document;\n    const firstChar = text[0];\n    const lastChar = text[text.length - 1];\n    var closeComment = true;\n    var binding;\n\n    if (firstChar === '#') {\n      if (lastChar === '/') {\n        binding = text.slice(1, -1);\n      } else {\n        binding = text.slice(1);\n        closeComment = false;\n      }\n      const matches = binding.match(BINDING_EXPRESSION);\n      if (matches) {\n        binding = matches[1] + ':' + matches[2];\n      }\n    } else if (firstChar === '/') {\n      // replace only with a closing comment\n    } else if (firstChar === '{' && lastChar === '}') {\n      binding = 'html:' + this.trim(text.slice(1, -1));\n    } else {\n      binding = 'text:' + this.trim(text);\n    }\n\n    if (binding) {\n      yield ownerDocument.createComment('ko ' + binding);\n    }\n    if (closeComment) {\n      yield ownerDocument.createComment('/ko');\n    }\n  }\n}\n\nclass Text extends Interpolated {\n  asAttr () { return this.text }\n\n  * textNodeReplacement () {\n    yield document.createTextNode(this.text.replace(/\"/g, '\\\\\"'));\n  }\n}\n\n/**\n *          Interpolation Parsing\n */\nfunction * innerParse (text) {\n  const innerMatch = text.match(INNER_EXPRESSION);\n  if (innerMatch) {\n    const [pre, inner, post] = innerMatch.slice(1);\n    yield * innerParse(pre);\n    yield new Text(inner);\n    yield new Expression(post);\n  } else {\n    yield new Expression(text);\n  }\n}\n\nfunction * parseOuterMatch (outerMatch) {\n  if (!outerMatch) { return }\n  let [pre, inner, post] = outerMatch.slice(1);\n  yield new Text(pre);\n  yield * innerParse(inner);\n  yield new Text(post);\n}\n\nfunction * parseInterpolation (text) {\n  for (const textOrExpr of parseOuterMatch(text.match(OUTER_EXPRESSION))) {\n    if (textOrExpr.text) { yield textOrExpr; }\n  }\n}\n\n/**\n * These are bindings that are mapped specific attributes, such as\n * two-way communication (value/checked) or which have anti-collision\n * properties (css).\n */\nconst DEFAULT_ATTRIBUTE_BINDING_MAP = {\n  value: 'value',\n  checked: 'checked',\n  class: 'css'\n};\n\n/**\n *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>\n */\nclass AttributeMustacheProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  constructor (params = {}) {\n    super(params);\n    this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);\n    this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;\n  }\n\n  * attributesToInterpolate (attributes) {\n    for (const attr of Array.from(attributes)) {\n      if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) { continue }\n      if (attr.specified && attr.value.includes('{{')) { yield attr; }\n    }\n  }\n\n  nodeHasBindings (node) {\n    return !this.attributesToInterpolate(node.attributes).next().done\n  }\n\n  partsTogether (parts, context, node, ...valueToWrite) {\n    if (parts.length > 1) {\n      return parts\n        .map(p => unwrap(p.asAttr(context, this.globals, node))).join('')\n    }\n    // It may be a writeable observable e.g. value=\"{{ value }}\".\n    const part = parts[0].asAttr(context, this.globals);\n    if (valueToWrite.length) { part(valueToWrite[0]); }\n    return part\n  }\n\n  attributeBinding (name, parts) {\n    return [name, parts]\n  }\n\n  * bindingParts (node, context) {\n    for (const attr of this.attributesToInterpolate(node.attributes)) {\n      const parts = Array.from(parseInterpolation(attr.value));\n      if (parts.length) { yield this.attributeBinding(attr.name, parts); }\n    }\n  }\n\n  getPossibleDirectBinding (attrName) {\n    const bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];\n    return bindingName && this.bindingHandlers.get(attrName)\n  }\n\n  * bindingObjects (node, context) {\n    for (const [attrName, parts] of this.bindingParts(node, context)) {\n      const bindingForAttribute = this.getPossibleDirectBinding(attrName);\n      const handler = bindingForAttribute ? attrName : `attr.${attrName}`;\n      const accessorFn = bindingForAttribute\n        ? (...v) => this.partsTogether(parts, context, node, ...v)\n        : (...v) => ({[attrName]: this.partsTogether(parts, context, node, ...v)});\n      node.removeAttribute(attrName);\n      yield { [handler]: accessorFn };\n    }\n  }\n\n  getBindingAccessors (node, context) {\n    return Object.assign({}, ...this.bindingObjects(node, context))\n  }\n}\n\n/**\n * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.\n *\n * This binding must come before the VirtualProvider.\n */\nclass TextMustacheProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 3 ] } // document.TEXT_NODE\n\n  * textToNodes (textNode) {\n    const parent = textNode.parentNode;\n    const isTextarea = parent && parent.nodeName === 'TEXTAREA';\n    const hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');\n\n    if (!hasStash || isTextarea) { return }\n\n    for (const part of parseInterpolation(textNode.nodeValue)) {\n      yield * part.textNodeReplacement(textNode);\n    }\n  }\n\n  textInterpolation (textNode) {\n    const newNodes = Array.from(this.textToNodes(textNode));\n\n    if (newNodes.length === 0) { return }\n\n    if (textNode.parentNode) {\n      const parent = textNode.parentNode;\n      const n = newNodes.length;\n      for (let i = 0; i < n; ++i) {\n        parent.insertBefore(newNodes[i], textNode);\n      }\n      parent.removeChild(textNode);\n    }\n\n    return newNodes\n  }\n\n  /**\n   * We convert as follows:\n   *\n   *   {{# ... }} into <!-- ko ... -->\n   *   {{/ ... }} into <!-- /ko -->\n   *   {{# ... /}} into <!-- ko ... --><!-- /ko -->\n   *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->\n   *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->\n   *\n   * VirtualProvider can then pick up and do the actual binding.\n   */\n  preprocessNode (node) {\n    return this.textInterpolation(node)\n  }\n}\n\nexport { AttributeMustacheProvider, TextMustacheProvider, parseInterpolation };\n//# sourceMappingURL=tko.provider.mustache.es6.js.map\n","import { addDisposeCallback, anyDomNodeIsAttachedToDocument, arrayForEach, arrayIndexOf, arrayMap, arrayPushAll, arrayRemoveItem, cleanNode, compareArrays, domData, extend, fixUpContinuousNodeArray, objectForEach, objectMap, options, removeNode, replaceDomNodes, tagNameLower, virtualElements } from 'tko.utils';\nimport { computed } from 'tko.computed';\nimport { dependencyDetection, isObservable, observable, unwrap } from 'tko.observable';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar storedBindingContextDomDataKey = domData.nextKey();\n\n\n\n// The bindingContext constructor is only called directly to create the root context. For child\n// contexts, use bindingContext.createChildContext or bindingContext.extend.\nfunction bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {\n\n    var self = this,\n        isFunc = typeof(dataItemOrAccessor) == \"function\" && !isObservable(dataItemOrAccessor),\n        nodes,\n        subscribable;\n\n    // The binding context object includes static properties for the current, parent, and root view models.\n    // If a view model is actually stored in an observable, the corresponding binding context object, and\n    // any child contexts, must be updated when the view model is changed.\n    function updateContext() {\n        // Most of the time, the context will directly get a view model object, but if a function is given,\n        // we call the function to retrieve the view model. If the function accesses any observables or returns\n        // an observable, the dependency is tracked, and those observables can later cause the binding\n        // context to be updated.\n        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor,\n            dataItem = unwrap(dataItemOrObservable);\n\n        if (parentContext) {\n            // When a \"parent\" context is given, register a dependency on the parent context. Thus whenever the\n            // parent context is updated, this context will also be updated.\n            if (parentContext._subscribable)\n                parentContext._subscribable();\n\n            // Copy $root and any custom properties from the parent context\n            extend(self, parentContext);\n\n            // Because the above copy overwrites our own properties, we need to reset them.\n            self._subscribable = subscribable;\n        } else {\n            self.$parents = [];\n            self.$root = dataItem;\n\n            // Export 'ko' in the binding context so it will be available in bindings and templates\n            // even if 'ko' isn't exported as a global, such as when using an AMD loader.\n            // See https://github.com/SteveSanderson/knockout/issues/490\n            self.ko = options.knockoutInstance;\n        }\n        self.$rawData = dataItemOrObservable;\n        self.$data = dataItem;\n        if (dataItemAlias)\n            self[dataItemAlias] = dataItem;\n\n        // The extendCallback function is provided when creating a child context or extending a context.\n        // It handles the specific actions needed to finish setting up the binding context. Actions in this\n        // function could also add dependencies to this binding context.\n        if (extendCallback)\n            extendCallback(self, parentContext, dataItem);\n\n        return self.$data;\n    }\n\n    function disposeWhen() {\n        return nodes && !anyDomNodeIsAttachedToDocument(nodes);\n    }\n\n    if (settings && settings.exportDependencies) {\n        // The \"exportDependencies\" option means that the calling code will track any dependencies and re-create\n        // the binding context when they change.\n        updateContext();\n        return;\n    }\n\n    subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });\n\n    // At this point, the binding context has been initialized, and the \"subscribable\" computed observable is\n    // subscribed to any observables that were accessed in the process. If there is nothing to track, the\n    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in\n    // the context object.\n    if (subscribable.isActive()) {\n        self._subscribable = subscribable;\n\n        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed\n        subscribable.equalityComparer = null;\n\n        // We need to be able to dispose of this computed observable when it's no longer needed. This would be\n        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and\n        // we cannot assume that those nodes have any relation to each other. So instead we track any node that\n        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.\n\n        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates\n        nodes = [];\n        subscribable._addNode = function(node) {\n            nodes.push(node);\n            addDisposeCallback(node, function(node) {\n                arrayRemoveItem(nodes, node);\n                if (!nodes.length) {\n                    subscribable.dispose();\n                    self._subscribable = subscribable = undefined;\n                }\n            });\n        };\n    }\n}\n\nbindingContext.prototype.lookup = function (token, globals, node) {\n  // short circuits\n  switch (token) {\n    case '$element': return node\n    case '$context': return this\n    case 'this': case '$data': return this.$data\n  }\n  const $data = this.$data;\n  // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.\n  if ($data instanceof Object && token in $data) { return $data[token] }\n  if (token in this) { return this[token] }\n  if (token in globals) { return globals[token] }\n\n  throw new Error(`The variable \"${token}\" was not found on $data, $context, or globals.`)\n};\n\n// Extend the binding context hierarchy with a new view model object. If the parent context is watching\n// any observables, the new child context will automatically get a dependency on the parent context.\n// But this does not mean that the $data value of the child context will also get updated. If the child\n// view model also depends on the parent view model, you must provide a function that returns the correct\n// view model on each update.\nbindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {\n    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function(self, parentContext) {\n        // Extend the context hierarchy by setting the appropriate pointers\n        self.$parentContext = parentContext;\n        self.$parent = parentContext.$data;\n        self.$parents = (parentContext.$parents || []).slice(0);\n        self.$parents.unshift(self.$parent);\n        if (extendCallback)\n            extendCallback(self);\n    }, settings);\n};\n\n// Extend the binding context with new custom properties. This doesn't change the context hierarchy.\n// Similarly to \"child\" contexts, provide a function here to make sure that the correct values are set\n// when an observable view model is updated.\nbindingContext.prototype.extend = function(properties) {\n    // If the parent context references an observable view model, \"_subscribable\" will always be the\n    // latest view model object. If not, \"_subscribable\" isn't set, and we can use the static \"$data\" value.\n    return new bindingContext(this._subscribable || this.$data, this, null, function(self, parentContext) {\n        // This \"child\" context doesn't directly track a parent observable view model,\n        // so we need to manually set the $rawData value to match the parent.\n        self.$rawData = parentContext.$rawData;\n        extend(self, typeof(properties) === \"function\" ? properties() : properties);\n    });\n};\n\nbindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {\n    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { \"exportDependencies\": true });\n};\n\n\nfunction storedBindingContextForNode(node, bindingContext) {\n    if (arguments.length == 2) {\n        domData.set(node, storedBindingContextDomDataKey, bindingContext);\n        if (bindingContext._subscribable)\n            bindingContext._subscribable._addNode(node);\n    } else {\n        return domData.get(node, storedBindingContextDomDataKey);\n    }\n}\n\n\n// Retrieving binding context from arbitrary nodes\nfunction contextFor(node) {\n    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)\n    switch (node.nodeType) {\n    case 1:\n    case 8:\n        var context = storedBindingContextForNode(node);\n        if (context) return context;\n        if (node.parentNode) return contextFor(node.parentNode);\n        break;\n    }\n    return undefined;\n}\n\n\nfunction dataFor(node) {\n    var context = contextFor(node);\n    return context ? context.$data : undefined;\n}\n\nclass BindingHandler extends LifeCycle {\n  constructor (params) {\n    super();\n    const {$element, valueAccessor, allBindings, $context} = params;\n    Object.assign(this, {\n      valueAccessor,\n      allBindings,\n      $element,\n      $context,\n      $data: $context.$data\n    });\n\n    this.anchorTo($element);\n  }\n\n  get value () { return this.valueAccessor() }\n  set value (v) { return this.valueAccessor(v) }\n\n  get controlsDescendants () { return false }\n\n  static get allowVirtualElements () { return false }\n  static get isBindingHandlerClass () { return true }\n\n  /* Overload this for asynchronous bindings or bindings that recursively\n     apply bindings (e.g. components, foreach, template).\n\n     A binding should be complete when it has run through once, notably\n     in server-side bindings for pre-rendering.\n  */\n  get bindingCompleted () { return true }\n\n  static registerAs (name, provider = options.bindingProviderInstance) {\n    provider.bindingHandlers.set(name, this);\n  }\n}\n\n/**\n * An AsyncBindingHandler shall call `completeBinding` when the binding\n * is to be considered complete.\n */\nclass AsyncBindingHandler extends BindingHandler {\n  constructor (params) {\n    super(params);\n    this.bindingCompletion = new options.Promise((resolve) => { this.completeBinding = resolve; });\n  }\n\n  get bindingCompleted () { return this.bindingCompletion }\n}\n\n/**\n * We have no guarantees, for users employing legacy bindings,\n * that it has not been changed with a modification like\n *\n *    ko.bindingHandlers[name] = { init: ...}\n *\n * ... so we have to keep track by way of a map.\n */\nconst PossibleWeakMap = options.global.WeakMap || Map;\nconst legacyBindingMap = new PossibleWeakMap();\n\nclass LegacyBindingHandler extends BindingHandler {\n  constructor (params) {\n    super(params);\n    const handler = this.handler;\n\n    if (typeof handler.dispose === 'function') {\n      this.addDisposable(handler);\n    }\n\n    try {\n      this.initReturn = handler.init && handler.init(...this.legacyArgs);\n    } catch (e) { params.onError('init', e); }\n\n    if (typeof handler.update === 'function') {\n      this.computed(() => {\n        try {\n          handler.update(...this.legacyArgs);\n        } catch (e) {\n          params.onError('update', e);\n        }\n      });\n    }\n  }\n\n  get legacyArgs () {\n    return [\n      this.$element, this.valueAccessor, this.allBindings,\n      this.$data, this.$context\n    ]\n  }\n\n  get controlsDescendants () {\n    const objectToTest = this.initReturn || this.handler || {};\n    return objectToTest.controlsDescendantBindings\n  }\n\n  /**\n   * Create a handler instance from the `origin`, which may be:\n   *\n   * 1. an object (becomes LegacyBindingHandler)\n   * 2. a function (becomes LegacyBindingHandler with `init: function`)\n   *\n   * If given an object (the only kind supported in knockout 3.x and before), it\n   * shall draw the `init`, `update`, and `allowVirtualElements` properties\n   */\n  static getOrCreateFor (key, handler) {\n    if (legacyBindingMap.has(handler)) {\n      return legacyBindingMap.get(handler)\n    }\n    const newLegacyHandler = this.createFor(key, handler);\n    legacyBindingMap.set(handler, newLegacyHandler);\n    return newLegacyHandler\n  }\n\n  static createFor (key, handler) {\n    if (typeof handler === 'function') {\n      const [initFn, disposeFn] = [handler, handler.dispose];\n      return class extends LegacyBindingHandler {\n        get handler () {\n          const init = initFn.bind(this);\n          const dispose = disposeFn ? disposeFn.bind(this) : null;\n          return { init, dispose }\n        }\n        static get after () { return handler.after }\n        static get allowVirtualElements () {\n          return handler.allowVirtualElements || virtualElements.allowedBindings[key]\n        }\n      }\n    }\n\n    if (typeof handler === 'object') {\n      return class extends LegacyBindingHandler {\n        get handler () { return handler }\n        static get after () { return handler.after }\n        static get allowVirtualElements () {\n          return handler.allowVirtualElements || virtualElements.allowedBindings[key]\n        }\n      }\n    }\n\n    throw new Error('The given handler is not an appropriate type.')\n  }\n}\n\n/* eslint no-cond-assign: 0 */\n\n// The following element types will not be recursed into during binding.\nvar bindingDoesNotRecurseIntoElementTypes = {\n    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,\n    // because it's unexpected and a potential XSS issue.\n    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer\n    // and because such elements' contents are always intended to be bound in a different context\n    // from where they appear in the document.\n  'script': true,\n  'textarea': true,\n  'template': true\n};\n\n// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers\nfunction getBindingHandler (bindingKey) {\n  const handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);\n  if (!handler) { return }\n  if (handler.isBindingHandlerClass) { return handler }\n  return LegacyBindingHandler.getOrCreateFor(bindingKey, handler)\n}\n\n// Returns the valueAccesor function for a binding value\nfunction makeValueAccessor (value) {\n  return function () {\n    return value\n  }\n}\n\n// Returns the value of a valueAccessor function\nfunction evaluateValueAccessor (valueAccessor) {\n  return valueAccessor()\n}\n\n// Given a function that returns bindings, create and return a new object that contains\n// binding value-accessors functions. Each accessor function calls the original function\n// so that it always gets the latest value and all dependencies are captured. This is used\n// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.\nfunction makeAccessorsFromFunction (callback) {\n  return objectMap(dependencyDetection.ignore(callback), function (value, key) {\n    return function () {\n      return callback()[key]\n    }\n  })\n}\n\n// Given a bindings function or object, create and return a new object that contains\n// binding value-accessors functions. This is used by ko.applyBindingsToNode.\nfunction makeBindingAccessors (bindings, context, node) {\n  if (typeof bindings === 'function') {\n    return makeAccessorsFromFunction(bindings.bind(null, context, node))\n  } else {\n    return objectMap(bindings, makeValueAccessor)\n  }\n}\n\n// This function is used if the binding provider doesn't include a getBindingAccessors function.\n// It must be called with 'this' set to the provider instance.\nfunction getBindingsAndMakeAccessors (node, context) {\n  return makeAccessorsFromFunction(this.getBindings.bind(this, node, context))\n}\n\nfunction applyBindingsToDescendantsInternal (bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {\n  var currentChild;\n  var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n  const provider = options.bindingProviderInstance;\n  const preprocessNode = provider.preprocessNode;\n\n    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's\n    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to\n    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that\n    // trigger insertion of <template> contents at that point in the document.\n  if (preprocessNode) {\n    while (currentChild = nextInQueue) {\n      nextInQueue = virtualElements.nextSibling(currentChild);\n      preprocessNode.call(provider, currentChild);\n    }\n        // Reset nextInQueue for the next loop\n    nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n  }\n\n  while (currentChild = nextInQueue) {\n        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position\n    nextInQueue = virtualElements.nextSibling(currentChild);\n    applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);\n  }\n}\n\nfunction hasBindings (node) {\n  const provider = options.bindingProviderInstance;\n  return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node)\n}\n\nfunction applyBindingsToNodeAndDescendantsInternal (bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n  // Perf optimisation: Apply bindings only if...\n  // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)\n  //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those\n  // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)\n  var isElement = nodeVerified.nodeType === 1;\n  if (isElement) { // Workaround IE <= 8 HTML parsing weirdness\n    virtualElements.normaliseVirtualElementDomStructure(nodeVerified);\n  }\n\n  var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)\n                             hasBindings(nodeVerified); // Case (2)\n\n  const {shouldBindDescendants} = shouldApplyBindings\n    ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)\n    : { shouldBindDescendants: true };\n\n  if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {\n    // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,\n    //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,\n    //    hence bindingContextsMayDifferFromDomParentElement is false\n    //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may\n    //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,\n    //    hence bindingContextsMayDifferFromDomParentElement is true\n    applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);\n  }\n}\n\nvar boundElementDomDataKey = domData.nextKey();\n\nfunction * topologicalSortBindings (bindings) {\n  const results = [];\n  // Depth-first sort\n  const bindingsConsidered = {};    // A temporary record of which bindings are already in 'result'\n  const cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it\n\n  objectForEach(bindings, function pushBinding (bindingKey) {\n    if (!bindingsConsidered[bindingKey]) {\n      const binding = getBindingHandler(bindingKey);\n      if (!binding) { return }\n        // First add dependencies (if any) of the current binding\n      if (binding.after) {\n        cyclicDependencyStack.push(bindingKey);\n        arrayForEach(binding.after, function (bindingDependencyKey) {\n          if (!bindings[bindingDependencyKey]) { return }\n          if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {\n            throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '))\n          } else {\n            pushBinding(bindingDependencyKey);\n          }\n        });\n        cyclicDependencyStack.length--;\n      }\n        // Next add the current binding\n      results.push([ bindingKey, binding ]);\n    }\n    bindingsConsidered[bindingKey] = true;\n  });\n\n  for (const result of results) { yield result; }\n}\n\nfunction applyBindingsToNodeInternal (node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified\n  var alreadyBound = domData.get(node, boundElementDomDataKey);\n  if (!sourceBindings) {\n    if (alreadyBound) {\n      onBindingError({\n        during: 'apply',\n        errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),\n        element: node,\n        bindingContext: bindingContext$$1\n      });\n      return false\n    }\n    domData.set(node, boundElementDomDataKey, true);\n  }\n\n    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because\n    // we can easily recover it just by scanning up the node's ancestors in the DOM\n    // (note: here, parent node means \"real DOM parent\" not \"virtual parent\", as there's no O(1) way to find the virtual parent)\n  if (!alreadyBound && bindingContextMayDifferFromDomParentElement) { storedBindingContextForNode(node, bindingContext$$1); }\n\n    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings\n  var bindings;\n  if (sourceBindings && typeof sourceBindings !== 'function') {\n    bindings = sourceBindings;\n  } else {\n    const provider = options.bindingProviderInstance;\n    const getBindings = provider.getBindingAccessors || getBindingsAndMakeAccessors;\n\n    if (provider.FOR_NODE_TYPES.includes(node.nodeType)) {\n          // Get the binding from the provider within a computed observable so that we can update the bindings whenever\n          // the binding context is updated or if the binding provider accesses observables.\n      var bindingsUpdater = computed(\n              function () {\n                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings.call(provider, node, bindingContext$$1);\n                  // Register a dependency on the binding context to support observable view models.\n                if (bindings && bindingContext$$1._subscribable) { bindingContext$$1._subscribable(); }\n                return bindings\n              },\n              null, { disposeWhenNodeIsRemoved: node }\n          );\n\n      if (!bindings || !bindingsUpdater.isActive()) { bindingsUpdater = null; }\n    }\n  }\n\n  var bindingHandlerThatControlsDescendantBindings;\n  if (bindings) {\n    const allBindingHandlers = {};\n    domData.set(node, 'bindingHandlers', allBindingHandlers);\n\n        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding\n        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets\n        // the latest binding value and registers a dependency on the binding updater.\n    const getValueAccessor = bindingsUpdater\n            ? (bindingKey) => function (optionalValue) {\n              var valueAccessor = bindingsUpdater()[bindingKey];\n              if (arguments.length === 0) {\n                return evaluateValueAccessor(valueAccessor)\n              } else {\n                return valueAccessor(optionalValue)\n              }\n            } : (bindingKey) => bindings[bindingKey];\n\n        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated\n    function allBindings () {\n      return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor)\n    }\n        // The following is the 3.x allBindings API\n    allBindings.has = (key) => key in bindings;\n    allBindings.get = (key) => bindings[key] && evaluateValueAccessor(getValueAccessor(key));\n\n    for (const [key, BindingHandlerClass] of topologicalSortBindings(bindings)) {\n        // Go through the sorted bindings, calling init and update for each\n      function reportBindingError (during, errorCaptured) {\n        onBindingError({\n          during,\n          errorCaptured,\n          bindings,\n          allBindings,\n          bindingKey: key,\n          bindingContext: bindingContext$$1,\n          element: node,\n          valueAccessor: getValueAccessor(key)\n        });\n      }\n\n      if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {\n        throw new Error(`The binding [${key}] cannot be used with virtual elements`)\n      }\n\n      try {\n        const bindingHandler = dependencyDetection.ignore(() =>\n          new BindingHandlerClass({\n            allBindings,\n            $element: node,\n            $context: bindingContext$$1,\n            onError: reportBindingError,\n            valueAccessor (...v) { return getValueAccessor(key)(...v) }\n          })\n        );\n\n              // Expose the bindings via domData.\n        allBindingHandlers[key] = bindingHandler;\n\n        if (bindingHandler.controlsDescendants) {\n          if (bindingHandlerThatControlsDescendantBindings !== undefined) { throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.') }\n          bindingHandlerThatControlsDescendantBindings = key;\n        }\n\n        if (bindingHandler.bindingCompleted instanceof options.Promise) {\n          asyncBindingsApplied.add(bindingHandler.bindingCompleted);\n        }\n      } catch (err) {\n        reportBindingError('creation', err);\n      }\n    }\n  }\n\n  return {\n    shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined\n  }\n}\n\nfunction getBindingContext (viewModelOrBindingContext) {\n  return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)\n    ? viewModelOrBindingContext\n    : new bindingContext(viewModelOrBindingContext)\n}\n\nfunction applyBindingAccessorsToNode (node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {\n  if (node.nodeType === 1) { // If it's an element, workaround IE <= 8 HTML parsing weirdness\n    virtualElements.normaliseVirtualElementDomStructure(node);\n  }\n  return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied)\n}\n\nfunction applyBindingsToNode (node, bindings, viewModelOrBindingContext) {\n  const asyncBindingsApplied = new Set();\n  var context = getBindingContext(viewModelOrBindingContext);\n  applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction applyBindingsToDescendants (viewModelOrBindingContext, rootNode) {\n  const asyncBindingsApplied = new Set();\n  if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {\n    applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n  }\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction applyBindings (viewModelOrBindingContext, rootNode) {\n  const asyncBindingsApplied = new Set();\n  // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.\n  if (!options.jQuery === undefined && options.jQuery) {\n    options.jQuery = options.jQuery;\n  }\n\n  if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) { throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node') }\n  rootNode = rootNode || options.document.body; // Make \"rootNode\" parameter optional\n\n  applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction onBindingError (spec) {\n  var error;\n  if (spec.bindingKey) {\n        // During: 'init' or initial 'update'\n    error = spec.errorCaptured;\n    spec.message = 'Unable to process binding \"' + spec.bindingKey +\n            '\" in binding \"' + spec.bindingKey +\n            '\"\\nMessage: ' + (error.message ? error.message : error);\n  } else {\n        // During: 'apply'\n    error = spec.errorCaptured;\n  }\n  try {\n    extend(error, spec);\n  } catch (e) {\n        // Read-only error e.g. a DOMEXception.\n    spec.stack = error.stack;\n    error = new Error(error.message ? error.message : error);\n    extend(error, spec);\n  }\n  options.onError(error);\n}\n\n/* eslint no-cond-assign: 0 */\n// Objective:\n// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,\n//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node\n// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node\n//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we\n//   previously mapped - retain those nodes, and just insert/delete other ones\n\n// \"callbackAfterAddingNodes\" will be invoked after any \"mapping\"-generated nodes are inserted into the container node\n// You can use this, for example, to activate bindings on those nodes.\n\nfunction mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {\n    // Map this array value inside a dependentObservable so we re-map when any dependency changes\n    var mappedNodes = [];\n    var dependentObservable = computed(function() {\n        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];\n\n        // On subsequent evaluations, just replace the previously-inserted DOM nodes\n        if (mappedNodes.length > 0) {\n            replaceDomNodes(mappedNodes, newMappedNodes);\n            if (callbackAfterAddingNodes)\n                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);\n        }\n\n        // Replace the contents of the mappedNodes array, thereby updating the record\n        // of which nodes would be deleted if valueToMap was itself later removed\n        mappedNodes.length = 0;\n        arrayPushAll(mappedNodes, newMappedNodes);\n    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });\n    return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };\n}\n\nvar lastMappingResultDomDataKey = domData.nextKey();\nvar deletedItemDummyValue = domData.nextKey();\n\nfunction setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {\n    // Compare the provided array against the previous one\n    array = array || [];\n    options$$1 = options$$1 || {};\n    var isFirstExecution = domData.get(domNode, lastMappingResultDomDataKey) === undefined;\n    var lastMappingResult = domData.get(domNode, lastMappingResultDomDataKey) || [];\n    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });\n    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);\n\n    // Build the new mapping result\n    var newMappingResult = [];\n    var lastMappingResultIndex = 0;\n    var newMappingResultIndex = 0;\n\n    var nodesToDelete = [];\n    var itemsToProcess = [];\n    var itemsForBeforeRemoveCallbacks = [];\n    var itemsForMoveCallbacks = [];\n    var itemsForAfterAddCallbacks = [];\n    var mapData;\n\n    function itemMovedOrRetained(editScriptIndex, oldPosition) {\n        mapData = lastMappingResult[oldPosition];\n        if (newMappingResultIndex !== oldPosition)\n            itemsForMoveCallbacks[editScriptIndex] = mapData;\n        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray\n        mapData.indexObservable(newMappingResultIndex++);\n        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);\n        newMappingResult.push(mapData);\n        itemsToProcess.push(mapData);\n    }\n\n    function callCallback(callback, items) {\n        if (callback) {\n            for (var i = 0, n = items.length; i < n; i++) {\n                if (items[i]) {\n                    arrayForEach(items[i].mappedNodes, function(node) {\n                        callback(node, i, items[i].arrayEntry);\n                    });\n                }\n            }\n        }\n    }\n\n    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {\n        movedIndex = editScriptItem['moved'];\n        switch (editScriptItem['status']) {\n        case \"deleted\":\n            if (movedIndex === undefined) {\n                mapData = lastMappingResult[lastMappingResultIndex];\n\n                // Stop tracking changes to the mapping for these nodes\n                if (mapData.dependentObservable) {\n                    mapData.dependentObservable.dispose();\n                    mapData.dependentObservable = undefined;\n                }\n\n                // Queue these nodes for later removal\n                if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {\n                    if (options$$1['beforeRemove']) {\n                        newMappingResult.push(mapData);\n                        itemsToProcess.push(mapData);\n                        if (mapData.arrayEntry === deletedItemDummyValue) {\n                            mapData = null;\n                        } else {\n                            itemsForBeforeRemoveCallbacks[i] = mapData;\n                        }\n                    }\n                    if (mapData) {\n                        nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);\n                    }\n                }\n            }\n            lastMappingResultIndex++;\n            break;\n\n        case \"retained\":\n            itemMovedOrRetained(i, lastMappingResultIndex++);\n            break;\n\n        case \"added\":\n            if (movedIndex !== undefined) {\n                itemMovedOrRetained(i, movedIndex);\n            } else {\n                mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };\n                newMappingResult.push(mapData);\n                itemsToProcess.push(mapData);\n                if (!isFirstExecution)\n                    itemsForAfterAddCallbacks[i] = mapData;\n            }\n            break;\n        }\n    }\n\n    // Store a copy of the array items we just considered so we can difference it next time\n    domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);\n\n    // Call beforeMove first before any changes have been made to the DOM\n    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);\n\n    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)\n    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);\n\n    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)\n    i = 0;\n    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {\n        // Get nodes for newly added items\n        if (!mapData.mappedNodes)\n            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));\n\n        // Put nodes in the right place if they aren't there already\n        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {\n            if (node !== nextNode)\n                virtualElements.insertAfter(domNode, node, lastNode);\n        }\n\n        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)\n        if (!mapData.initialized && callbackAfterAddingNodes) {\n            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);\n            mapData.initialized = true;\n        }\n    }\n\n    // If there's a beforeRemove callback, call it after reordering.\n    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using\n    // some sort of animation, which is why we first reorder the nodes that will be removed. If the\n    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.\n    // Perhaps we'll make that change in the future if this scenario becomes more common.\n    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);\n\n    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item\n    // as already \"removed\" so we won't call beforeRemove for it again, and it ensures that the item won't match up\n    // with an actual item in the array and appear as \"retained\" or \"moved\".\n    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {\n        if (itemsForBeforeRemoveCallbacks[i]) {\n            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;\n        }\n    }\n\n    // Finally call afterMove and afterAdd callbacks\n    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);\n    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);\n}\n\nexport { BindingHandler, AsyncBindingHandler, bindingContext, storedBindingContextForNode, contextFor, dataFor, getBindingHandler, applyBindingAccessorsToNode, applyBindingsToNode, applyBindingsToDescendants, applyBindings, setDomNodeChildrenFromArrayMapping };\n//# sourceMappingURL=tko.bind.es6.js.map\n","import { addOrRemoveItem, arrayFilter, arrayForEach, arrayGetDistinctValues, arrayIndexOf, arrayMap, arrayPushAll, createSymbolOrString, domData, ensureSelectElementIsRenderedCorrectly, ieVersion, makeArray, objectForEach, options, registerEventHandler, safeSetTimeout, setElementName, setHtml, setOptionNodeSelectionState, setTextContent, stringStartsWith, stringTrim, tagNameLower, toggleDomNodeCssClass, triggerEvent } from 'tko.utils';\nimport { dependencyDetection, isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed, pureComputed } from 'tko.computed';\nimport { applyBindingAccessorsToNode, applyBindingsToDescendants, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\n\nvar attr = {\n    update: function(element, valueAccessor, allBindings) {\n        var value = unwrap(valueAccessor()) || {};\n        objectForEach(value, function(attrName, attrValue) {\n            attrValue = unwrap(attrValue);\n\n            // Find the namespace of this attribute, if any.\n            // Defaulting to `null` should be ok, as\n            //\n            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )\n            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )\n            //\n            var prefixLen = attrName.indexOf(':');\n            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI( attrName.substr(0, prefixLen) );\n\n            // To cover cases like \"attr: { checked:someProp }\", we want to remove the attribute entirely\n            // when someProp is a \"no value\"-like value (strictly null, false, or undefined)\n            // (because the absence of the \"checked\" attr is how to mark an element as not checked, etc.)\n            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);\n\n            if (toRemove) {\n                element.removeAttributeNS(namespace, attrName);\n            } else {\n                element.setAttributeNS(namespace, attrName, attrValue.toString());\n            }\n\n            // Treat \"name\" specially - although you can think of it as an attribute, it also needs\n            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)\n            // Deliberately being case-sensitive here because XHTML would regard \"Name\" as a different thing\n            // entirely, and there's no strong reason to allow for such casing in HTML.\n            if (attrName === \"name\") {\n                setElementName(element, toRemove ? \"\" : attrValue.toString());\n            }\n        });\n    }\n};\n\nvar checked = {\n    after: ['value', 'attr'],\n    init: function (element, valueAccessor, allBindings) {\n        var checkedValue = pureComputed(function() {\n            // Treat \"value\" like \"checkedValue\" when it is included with \"checked\" binding\n            if (allBindings['has']('checkedValue')) {\n                return unwrap(allBindings.get('checkedValue'));\n            } else if (allBindings['has']('value')) {\n                return unwrap(allBindings.get('value'));\n            }\n\n            return element.value;\n        });\n\n        function updateModel() {\n            // This updates the model value from the view value.\n            // It runs in response to DOM events (click) and changes in checkedValue.\n            var isChecked = element.checked,\n                elemValue = useCheckedValue ? checkedValue() : isChecked;\n\n            // When we're first setting up this computed, don't change any model state.\n            if (dependencyDetection.isInitial()) {\n                return;\n            }\n\n            // We can ignore unchecked radio buttons, because some other radio\n            // button will be getting checked, and that one can take care of updating state.\n            if (isRadio && !isChecked) {\n                return;\n            }\n\n            var modelValue = dependencyDetection.ignore(valueAccessor);\n            if (valueIsArray) {\n                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;\n                if (oldElemValue !== elemValue) {\n                    // When we're responding to the checkedValue changing, and the element is\n                    // currently checked, replace the old elem value with the new elem value\n                    // in the model array.\n                    if (isChecked) {\n                        addOrRemoveItem(writableValue, elemValue, true);\n                        addOrRemoveItem(writableValue, oldElemValue, false);\n                    }\n\n                    oldElemValue = elemValue;\n                } else {\n                    // When we're responding to the user having checked/unchecked a checkbox,\n                    // add/remove the element value to the model array.\n                    addOrRemoveItem(writableValue, elemValue, isChecked);\n                }\n                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {\n                    modelValue(writableValue);\n                }\n            } else {\n                valueAccessor(elemValue, {onlyIfChanged: true});\n            }\n        }\n\n        function updateView() {\n            // This updates the view value from the model value.\n            // It runs in response to changes in the bound (checked) value.\n            var modelValue = unwrap(valueAccessor());\n\n            if (valueIsArray) {\n                // When a checkbox is bound to an array, being checked represents its value being present in that array\n                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;\n            } else if (isCheckbox) {\n                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish\n                element.checked = modelValue;\n            } else {\n                // For radio buttons, being checked means that the radio button's value corresponds to the model value\n                element.checked = (checkedValue() === modelValue);\n            }\n        }\n\n        var isCheckbox = element.type == \"checkbox\",\n            isRadio = element.type == \"radio\";\n\n        // Only bind to check boxes and radio buttons\n        if (!isCheckbox && !isRadio) {\n            return;\n        }\n\n        var rawValue = valueAccessor(),\n            valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array),\n            rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice),\n            oldElemValue = valueIsArray ? checkedValue() : undefined,\n            useCheckedValue = isRadio || valueIsArray;\n\n        // Set up two computeds to update the binding:\n\n        // The first responds to changes in the checkedValue value and to element clicks\n        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });\n        registerEventHandler(element, \"click\", updateModel);\n\n        // The second responds to changes in the model value (the one associated with the checked binding)\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n\n        rawValue = undefined;\n    }\n};\n\nvar checkedValue = {\n    update: function (element, valueAccessor) {\n        element.value = unwrap(valueAccessor());\n    }\n};\n\n// For certain common events (currently just 'click'), allow a simplified data-binding syntax\n// e.g. click:handler instead of the usual full-length event:{click:handler}\nfunction makeEventHandlerShortcut(eventName) {\n    return {\n        init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n            var newValueAccessor = function () {\n                var result = {};\n                result[eventName] = valueAccessor();\n                return result;\n            };\n            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);\n        }\n    };\n}\n\nvar eventHandler = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var eventsToHandle = valueAccessor() || {};\n        objectForEach(eventsToHandle, function(eventName) {\n            if (typeof eventName == \"string\") {\n                registerEventHandler(element, eventName, function (event) {\n                    var handlerReturnValue;\n                    var handlerFunction = valueAccessor()[eventName];\n                    if (!handlerFunction)\n                        return;\n\n                    try {\n                        // Take all the event args, and prefix with the viewmodel\n                        var argsForHandler = makeArray(arguments);\n                        viewModel = bindingContext['$data'];\n                        argsForHandler.unshift(viewModel);\n                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);\n                    } finally {\n                        if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\n                            if (event.preventDefault)\n                                event.preventDefault();\n                            else\n                                event.returnValue = false;\n                        }\n                    }\n\n                    var bubble = allBindings.get(eventName + 'Bubble') !== false;\n                    if (!bubble) {\n                        event.cancelBubble = true;\n                        if (event.stopPropagation)\n                            event.stopPropagation();\n                    }\n                });\n            }\n        });\n    }\n};\n\n\nvar onHandler = {\n    init: eventHandler.init,\n    preprocess: function (value, key, addBinding) {\n      addBinding(key.replace('on.', ''), '=>' + value);\n    }\n};\n\n// 'click' is just a shorthand for the usual full-length event:{click:handler}\nvar click = makeEventHandlerShortcut('click');\n\nvar css = {\n    aliases: ['class'],\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value !== null && typeof value == \"object\") {\n            objectForEach(value, function(className, shouldHaveClass) {\n                shouldHaveClass = unwrap(shouldHaveClass);\n                toggleDomNodeCssClass(element, className, shouldHaveClass);\n            });\n        } else {\n            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value\n            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);\n            element[css.classesWrittenByBindingKey] = value;\n            toggleDomNodeCssClass(element, value, true);\n        }\n    },\n    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')\n};\n\nvar enable = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value && element.disabled) {\n            element.removeAttribute(\"disabled\");\n        } else if ((!value) && (!element.disabled)) {\n            element.disabled = true;\n        }\n    }\n};\n\nvar disable = {\n    update: function (element, valueAccessor) {\n        enable.update(element, function() { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');\nvar hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');\n\nvar hasfocus = {\n    init: function(element, valueAccessor /*, allBindings */) {\n        var handleElementFocusChange = function(isFocused) {\n            // Where possible, ignore which event was raised and determine focus state using activeElement,\n            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.\n            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,\n            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus\n            // from calling 'blur()' on the element when it loses focus.\n            // Discussion at https://github.com/SteveSanderson/knockout/pull/352\n            element[hasfocusUpdatingProperty] = true;\n            var ownerDoc = element.ownerDocument;\n            if (\"activeElement\" in ownerDoc) {\n                var active;\n                try {\n                    active = ownerDoc.activeElement;\n                } catch(e) {\n                    // IE9 throws if you access activeElement during page load (see issue #703)\n                    active = ownerDoc.body;\n                }\n                isFocused = (active === element);\n            }\n            // var modelValue = valueAccessor();\n            valueAccessor(isFocused, {onlyIfChanged: true});\n\n            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function\n            element[hasfocusLastValue] = isFocused;\n            element[hasfocusUpdatingProperty] = false;\n        };\n        var handleElementFocusIn = handleElementFocusChange.bind(null, true);\n        var handleElementFocusOut = handleElementFocusChange.bind(null, false);\n\n        registerEventHandler(element, \"focus\", handleElementFocusIn);\n        registerEventHandler(element, \"focusin\", handleElementFocusIn); // For IE\n        registerEventHandler(element, \"blur\",  handleElementFocusOut);\n        registerEventHandler(element, \"focusout\",  handleElementFocusOut); // For IE\n    },\n    update: function(element, valueAccessor) {\n        var value = !!unwrap(valueAccessor());\n\n        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {\n            value ? element.focus() : element.blur();\n\n            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).\n            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current\n            // element was focused already.\n            if (!value && element[hasfocusLastValue]) {\n                element.ownerDocument.body.focus();\n            }\n\n            // For IE, which doesn't reliably fire \"focus\" or \"blur\" events synchronously\n            dependencyDetection.ignore(triggerEvent, null, [element, value ? \"focusin\" : \"focusout\"]);\n        }\n    }\n};\n\nvar html = {\n    init: function() {\n        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)\n        return {\n            'controlsDescendantBindings': true\n        };\n    },\n    //\n    // Modify internal, per ko.punches and :\n    //      http://stackoverflow.com/a/15348139\n    update: function(element, valueAccessor) {\n        setHtml(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar $let = {\n    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n        // Make a modified binding context, with extra properties, and apply it to descendant elements\n        var innerContext = bindingContext['extend'](valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n\n        return { 'controlsDescendantBindings': true };\n    },\n    allowVirtualElements: true\n};\n\nvar hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';\n\n// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values\n// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values\n// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.\nvar selectExtensions = {\n    optionsValueDomDataKey: undefined,\n\n    readValue : function(element) {\n        switch (tagNameLower(element)) {\n        case 'option':\n            if (element[hasDomDataExpandoProperty] === true)\n                return domData.get(element, selectExtensions.optionValueDomDataKey);\n            return element.value;\n        case 'select':\n            return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;\n        default:\n            return element.value;\n        }\n    },\n\n    writeValue: function(element, value, allowUnset) {\n        switch (tagNameLower(element)) {\n        case 'option':\n            switch(typeof value) {\n            case \"string\":\n                domData.set(element, selectExtensions.optionValueDomDataKey, undefined);\n                if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node\n                    delete element[hasDomDataExpandoProperty];\n                }\n                element.value = value;\n                break;\n            default:\n                // Store arbitrary object using DomData\n                domData.set(element, selectExtensions.optionValueDomDataKey, value);\n                element[hasDomDataExpandoProperty] = true;\n\n                // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.\n                element.value = typeof value === \"number\" ? value : \"\";\n                break;\n            }\n            break;\n        case 'select':\n            if (value === \"\" || value === null)       // A blank string or null value will select the caption\n                value = undefined;\n            var selection = -1;\n            for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {\n                optionValue = selectExtensions.readValue(element.options[i]);\n                // Include special check to handle selecting a caption with a blank string value\n                if (optionValue == value || (optionValue === \"\" && value === undefined)) {\n                    selection = i;\n                    break;\n                }\n            }\n            if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {\n                element.selectedIndex = selection;\n            }\n            break;\n        default:\n            if ((value === null) || (value === undefined))\n                value = \"\";\n            element.value = value;\n            break;\n        }\n    }\n};\n\nvar captionPlaceholder = {};\n\nvar options$1 = {\n    init: function(element) {\n        if (tagNameLower(element) !== \"select\")\n            throw new Error(\"options binding applies only to SELECT elements\");\n\n        // Remove all existing <option>s.\n        while (element.length > 0) {\n            element.remove(0);\n        }\n\n        // Ensures that the binding processor doesn't try to bind the options\n        return { 'controlsDescendantBindings': true };\n    },\n    update: function (element, valueAccessor, allBindings) {\n        function selectedOptions() {\n            return arrayFilter(element.options, function (node) { return node.selected; });\n        }\n\n        var selectWasPreviouslyEmpty = element.length == 0,\n            multiple = element.multiple,\n            previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null,\n            unwrappedArray = unwrap(valueAccessor()),\n            valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'),\n            includeDestroyed = allBindings.get('optionsIncludeDestroyed'),\n            arrayToDomNodeChildrenOptions = {},\n            captionValue,\n            filteredArray,\n            previousSelectedValues = [];\n\n        if (!valueAllowUnset) {\n            if (multiple) {\n                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);\n            } else if (element.selectedIndex >= 0) {\n                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));\n            }\n        }\n\n        if (unwrappedArray) {\n            if (typeof unwrappedArray.length == \"undefined\") // Coerce single value into array\n                unwrappedArray = [unwrappedArray];\n\n            // Filter out any entries marked as destroyed\n            filteredArray = arrayFilter(unwrappedArray, function(item) {\n                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);\n            });\n\n            // If caption is included, add it to the array\n            if (allBindings['has']('optionsCaption')) {\n                captionValue = unwrap(allBindings.get('optionsCaption'));\n                // If caption value is null or undefined, don't show a caption\n                if (captionValue !== null && captionValue !== undefined) {\n                    filteredArray.unshift(captionPlaceholder);\n                }\n            }\n        } else {\n            // If a falsy value is provided (e.g. null), we'll simply empty the select element\n        }\n\n        function applyToObject(object, predicate, defaultValue) {\n            var predicateType = typeof predicate;\n            if (predicateType == \"function\")    // Given a function; run it against the data value\n                return predicate(object);\n            else if (predicateType == \"string\") // Given a string; treat it as a property name on the data value\n                return object[predicate];\n            else                                // Given no optionsText arg; use the data value itself\n                return defaultValue;\n        }\n\n        // The following functions can run at two different times:\n        // The first is when the whole array is being updated directly from this binding handler.\n        // The second is when an observable value for a specific array entry is updated.\n        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.\n        var itemUpdate = false;\n        function optionForArrayItem(arrayEntry, index, oldOptions) {\n            if (oldOptions.length) {\n                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [ selectExtensions.readValue(oldOptions[0]) ] : [];\n                itemUpdate = true;\n            }\n            var option = element.ownerDocument.createElement(\"option\");\n            if (arrayEntry === captionPlaceholder) {\n                setTextContent(option, allBindings.get('optionsCaption'));\n                selectExtensions.writeValue(option, undefined);\n            } else {\n                // Apply a value to the option element\n                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);\n                selectExtensions.writeValue(option, unwrap(optionValue));\n\n                // Apply some text to the option element\n                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);\n                setTextContent(option, optionText);\n            }\n            return [option];\n        }\n\n        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection\n        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208\n        arrayToDomNodeChildrenOptions['beforeRemove'] =\n            function (option) {\n                element.removeChild(option);\n            };\n\n        function setSelectionCallback(arrayEntry, newOptions) {\n            if (itemUpdate && valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            } else if (previousSelectedValues.length) {\n                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.\n                // That's why we first added them without selection. Now it's time to set the selection.\n                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;\n                setOptionNodeSelectionState(newOptions[0], isSelected);\n\n                // If this option was changed from being selected during a single-item update, notify the change\n                if (itemUpdate && !isSelected) {\n                    dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                }\n            }\n        }\n\n        var callback = setSelectionCallback;\n        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == \"function\") {\n            callback = function(arrayEntry, newOptions) {\n                setSelectionCallback(arrayEntry, newOptions);\n                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);\n            };\n        }\n\n        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);\n\n        dependencyDetection.ignore(function () {\n            if (valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            } else {\n                // Determine if the selection has changed as a result of updating the options list\n                var selectionChanged;\n                if (multiple) {\n                    // For a multiple-select box, compare the new selection count to the previous one\n                    // But if nothing was selected before, the selection can't have changed\n                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;\n                } else {\n                    // For a single-select box, compare the current value to the previous value\n                    // But if nothing was selected before or nothing is selected now, just look for a change in selection\n                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)\n                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])\n                        : (previousSelectedValues.length || element.selectedIndex >= 0);\n                }\n\n                // Ensure consistency between model value and selected option.\n                // If the dropdown was changed so that selection is no longer the same,\n                // notify the value or selectedOptions binding.\n                if (selectionChanged) {\n                    triggerEvent(element, \"change\");\n                }\n            }\n        });\n\n        // Workaround for IE bug\n        ensureSelectElementIsRenderedCorrectly(element);\n\n        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)\n            element.scrollTop = previousScrollTop;\n    }\n};\n\nselectExtensions.optionValueDomDataKey = domData.nextKey();\n\nvar selectedOptions = {\n    after: ['options', 'foreach'],\n\n    init: function (element, valueAccessor, allBindings) {\n        registerEventHandler(element, \"change\", function () {\n            var value = valueAccessor(), valueToWrite = [];\n            arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\n                if (node.selected)\n                    valueToWrite.push(selectExtensions.readValue(node));\n            });\n            valueAccessor(valueToWrite);\n        });\n    },\n\n    update: function (element, valueAccessor) {\n        if (tagNameLower(element) != \"select\")\n            throw new Error(\"values binding applies only to SELECT elements\");\n\n        var newValue = unwrap(valueAccessor()),\n            previousScrollTop = element.scrollTop;\n\n        if (newValue && typeof newValue.length == \"number\") {\n            arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\n                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;\n                if (node.selected != isSelected) {      // This check prevents flashing of the select element in IE\n                    setOptionNodeSelectionState(node, isSelected);\n                }\n            });\n        }\n\n        element.scrollTop = previousScrollTop;\n    }\n};\n\nvar style = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor() || {});\n        objectForEach(value, function(styleName, styleValue) {\n            styleValue = unwrap(styleValue);\n\n            if (styleValue === null || styleValue === undefined || styleValue === false) {\n                // Empty string removes the value, whereas null/undefined have no effect\n                styleValue = \"\";\n            }\n\n            element.style[styleName] = styleValue;\n        });\n    }\n};\n\nvar submit = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        if (typeof valueAccessor() != \"function\")\n            throw new Error(\"The value for a submit binding must be a function\");\n        registerEventHandler(element, \"submit\", function (event) {\n            var handlerReturnValue;\n            var value = valueAccessor();\n            try { handlerReturnValue = value.call(bindingContext['$data'], element); }\n            finally {\n                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\n                    if (event.preventDefault)\n                        event.preventDefault();\n                    else\n                        event.returnValue = false;\n                }\n            }\n        });\n    }\n};\n\nvar text = {\n    init: function() {\n        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).\n        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.\n        return { controlsDescendantBindings: true };\n    },\n    update: function (element, valueAccessor) {\n        setTextContent(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar parseVersion;\nvar operaVersion;\nvar userAgent;\nvar safariVersion;\nvar firefoxVersion;\nvar w = options.global;\n\nif (w.navigator) {\n    parseVersion = function (matches) {\n        if (matches) {\n            return parseFloat(matches[1]);\n        }\n    };\n\n    // Detect various browser versions because some old versions don't fully support the 'input' event\n    operaVersion = w.opera && w.opera.version && parseInt(w.opera.version()),\n        userAgent = w.navigator.userAgent,\n        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\\/([^ ]*) safari/i)),\n        firefoxVersion = parseVersion(userAgent.match(/Firefox\\/([^ ]*)/));\n}\n\n// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.\n// But it does fire the 'selectionchange' event on many of those, presumably because the\n// cursor is moving and that counts as the selection changing. The 'selectionchange' event is\n// fired at the document level only and doesn't directly indicate which element changed. We\n// set up just one event handler for the document and use 'activeElement' to determine which\n// element was changed.\nif (ieVersion < 10) {\n    var selectionChangeRegisteredName = domData.nextKey(),\n        selectionChangeHandlerName = domData.nextKey();\n    var selectionChangeHandler = function(event) {\n        var target = this.activeElement,\n            handler = target && domData.get(target, selectionChangeHandlerName);\n        if (handler) {\n            handler(event);\n        }\n    };\n    var registerForSelectionChangeEvent = function (element, handler) {\n        var ownerDoc = element.ownerDocument;\n        if (!domData.get(ownerDoc, selectionChangeRegisteredName)) {\n            domData.set(ownerDoc, selectionChangeRegisteredName, true);\n            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);\n        }\n        domData.set(element, selectionChangeHandlerName, handler);\n    };\n}\n\nvar textInput = {\n    aliases: 'textinput',\n    init: function (element, valueAccessor) {\n\n        var previousElementValue = element.value,\n            timeoutHandle,\n            elementValueBeforeEvent;\n\n        var updateModel = function (event) {\n            clearTimeout(timeoutHandle);\n            elementValueBeforeEvent = timeoutHandle = undefined;\n\n            var elementValue = element.value;\n            if (previousElementValue !== elementValue) {\n                // Provide a way for tests to know exactly which event was processed\n                if (options.debug && event) element['_ko_textInputProcessedEvent'] = event.type;\n                previousElementValue = elementValue;\n                valueAccessor(elementValue);\n            }\n        };\n\n        var deferUpdateModel = function (event) {\n            if (!timeoutHandle) {\n                // The elementValueBeforeEvent variable is set *only* during the brief gap between an\n                // event firing and the updateModel function running. This allows us to ignore model\n                // updates that are from the previous state of the element, usually due to techniques\n                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.\n                elementValueBeforeEvent = element.value;\n                var handler = options.debug ? updateModel.bind(element, {type: event.type}) : updateModel;\n                timeoutHandle = safeSetTimeout(handler, 4);\n            }\n        };\n\n        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);\n        // so we'll make sure all updates are asynchronous\n        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;\n\n        var updateView = function () {\n            var modelValue = unwrap(valueAccessor());\n\n            if (modelValue === null || modelValue === undefined) {\n                modelValue = '';\n            }\n\n            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateView, 4);\n                return;\n            }\n\n            // Update the element only if the element and model are different. On some browsers, updating the value\n            // will move the cursor to the end of the input, which would be bad while the user is typing.\n            if (element.value !== modelValue) {\n                previousElementValue = modelValue;  // Make sure we ignore events (propertychange) that result from updating the value\n                element.value = modelValue;\n            }\n        };\n\n        var onEvent = function (event, handler) {\n            registerEventHandler(element, event, handler);\n        };\n\n        if (options.debug && textInput._forceUpdateOn) {\n            // Provide a way for tests to specify exactly which events are bound\n            arrayForEach(textInput._forceUpdateOn, function(eventName) {\n                if (eventName.slice(0,5) == 'after') {\n                    onEvent(eventName.slice(5), deferUpdateModel);\n                } else {\n                    onEvent(eventName, updateModel);\n                }\n            });\n        } else {\n            if (ieVersion < 10) {\n                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever\n                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,\n                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it\n                // when using autocomplete, we'll use 'propertychange' for it also.\n                onEvent('propertychange', function(event) {\n                    if (event.propertyName === 'value') {\n                        ieUpdateModel(event);\n                    }\n                });\n\n                if (ieVersion == 8) {\n                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from\n                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following\n                    // events too.\n                    onEvent('keyup', updateModel);      // A single keystoke\n                    onEvent('keydown', updateModel);    // The first character when a key is held down\n                }\n                if (ieVersion >= 8) {\n                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using\n                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text\n                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'\n                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.\n                    // These are also needed in IE8 because of the bug described above.\n                    registerForSelectionChangeEvent(element, ieUpdateModel);  // 'selectionchange' covers cut, paste, drop, delete, etc.\n                    onEvent('dragend', deferUpdateModel);\n                }\n            } else {\n                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed\n                // through the user interface.\n                onEvent('input', updateModel);\n\n                if (safariVersion < 5 && tagNameLower(element) === \"textarea\") {\n                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'\n                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.\n                    onEvent('keydown', deferUpdateModel);\n                    onEvent('paste', deferUpdateModel);\n                    onEvent('cut', deferUpdateModel);\n                } else if (operaVersion < 11) {\n                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.\n                    // We can try to catch some of those using 'keydown'.\n                    onEvent('keydown', deferUpdateModel);\n                } else if (firefoxVersion < 4.0) {\n                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete\n                    onEvent('DOMAutoComplete', updateModel);\n\n                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.\n                    onEvent('dragdrop', updateModel);       // <3.5\n                    onEvent('drop', updateModel);           // 3.5\n                }\n            }\n        }\n\n        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.\n        onEvent('change', updateModel);\n\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\n// // textinput is an alias for textInput\n// ko.bindingHandlers['textinput'] = {\n//     // preprocess is the only way to set up a full alias\n//     'preprocess': function (value, name, addBinding) {\n//         addBinding('textInput', value);\n//     }\n// };\n\nvar uniqueName = {\n    init: function (element, valueAccessor) {\n        if (valueAccessor()) {\n            var name = \"ko_unique_\" + (++uniqueName.currentIndex);\n            setElementName(element, name);\n        }\n    },\n    currentIndex: 0\n};\n\nvar value = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit\n        if (element.tagName.toLowerCase() == \"input\" && (element.type == \"checkbox\" || element.type == \"radio\")) {\n            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });\n            return;\n        }\n\n        // Always catch \"change\" event; possibly other events too if asked\n        var eventsToCatch = [\"change\"];\n        var requestedEventsToCatch = allBindings.get(\"valueUpdate\");\n        var propertyChangedFired = false;\n        var elementValueBeforeEvent = null;\n\n        if (requestedEventsToCatch) {\n            if (typeof requestedEventsToCatch == \"string\") // Allow both individual event names, and arrays of event names\n                requestedEventsToCatch = [requestedEventsToCatch];\n            arrayPushAll(eventsToCatch, requestedEventsToCatch);\n            eventsToCatch = arrayGetDistinctValues(eventsToCatch);\n        }\n\n        var valueUpdateHandler = function() {\n            elementValueBeforeEvent = null;\n            propertyChangedFired = false;\n            var modelValue = valueAccessor();\n            var elementValue = selectExtensions.readValue(element);\n            valueAccessor(elementValue);\n        };\n\n        // Workaround for https://github.com/SteveSanderson/knockout/issues/122\n        // IE doesn't fire \"change\" events on textboxes if the user selects a value from its autocomplete list\n        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == \"input\" && element.type == \"text\"\n                                       && element.autocomplete != \"off\" && (!element.form || element.form.autocomplete != \"off\");\n        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, \"propertychange\") == -1) {\n            registerEventHandler(element, \"propertychange\", function () { propertyChangedFired = true; });\n            registerEventHandler(element, \"focus\", function () { propertyChangedFired = false; });\n            registerEventHandler(element, \"blur\", function() {\n                if (propertyChangedFired) {\n                    valueUpdateHandler();\n                }\n            });\n        }\n\n        arrayForEach(eventsToCatch, function(eventName) {\n            // The syntax \"after<eventname>\" means \"run the handler asynchronously after the event\"\n            // This is useful, for example, to catch \"keydown\" events after the browser has updated the control\n            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)\n            var handler = valueUpdateHandler;\n            if (stringStartsWith(eventName, \"after\")) {\n                handler = function() {\n                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between\n                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen\n                    // at the earliest asynchronous opportunity. We store this temporary information so that\n                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,\n                    // we can overwrite that model value change with the value the user just typed. Otherwise,\n                    // techniques like rateLimit can trigger model changes at critical moments that will\n                    // override the user's inputs, causing keystrokes to be lost.\n                    elementValueBeforeEvent = selectExtensions.readValue(element);\n                    safeSetTimeout(valueUpdateHandler, 0);\n                };\n                eventName = eventName.substring(\"after\".length);\n            }\n            registerEventHandler(element, eventName, handler);\n        });\n\n        var updateFromModel = function () {\n            var newValue = unwrap(valueAccessor());\n            var elementValue = selectExtensions.readValue(element);\n\n            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateFromModel, 0);\n                return;\n            }\n\n            var valueHasChanged = (newValue !== elementValue);\n\n            if (valueHasChanged) {\n                if (tagNameLower(element) === \"select\") {\n                    var allowUnset = allBindings.get('valueAllowUnset');\n                    var applyValueAction = function () {\n                        selectExtensions.writeValue(element, newValue, allowUnset);\n                    };\n                    applyValueAction();\n\n                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {\n                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,\n                        // because you're not allowed to have a model value that disagrees with a visible UI selection.\n                        dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                    } else {\n                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread\n                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread\n                        // to apply the value as well.\n                        safeSetTimeout(applyValueAction, 0);\n                    }\n                } else {\n                    selectExtensions.writeValue(element, newValue);\n                }\n            }\n        };\n\n        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\nvar visible = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        var isCurrentlyVisible = !(element.style.display == \"none\");\n        if (value && !isCurrentlyVisible)\n            element.style.display = \"\";\n        else if ((!value) && isCurrentlyVisible)\n            element.style.display = \"none\";\n    }\n};\n\nvar hidden = {\n    update: function (element, valueAccessor) {\n        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar using = {\n    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var innerContext = bindingContext.createChildContext(valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { controlsDescendantBindings: true };\n    },\n    allowVirtualElements: true\n};\n\nvar bindings = {\n    attr: attr,\n    checked: checked,\n    checkedValue: checkedValue,\n    click: click,\n    css: css, 'class': css,\n    enable: enable,\n    'event': eventHandler,\n    disable: disable,\n    hasfocus: hasfocus, hasFocus: hasfocus,\n    hidden: hidden,\n    html: html,\n    'let': $let,\n    on: onHandler,\n    options: options$1,\n    selectedOptions: selectedOptions,\n    style: style,\n    submit: submit,\n    text: text,\n    textInput: textInput,\n    textinput: textInput,\n    uniqueName: uniqueName,\n    using: using,\n    value: value,\n    visible: visible\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.core.es6.js.map\n","import { dependencyDetection, isObservable, observable, peek, unwrap } from 'tko.observable';\nimport { arrayFilter, domData, domNodeIsAttachedToDocument, extend, fixUpContinuousNodeArray, ieVersion, makeArray, memoization, moveCleanedNodesToContainerElement, options, parseHtmlFragment, replaceDomNodes, setHtml, tagNameLower, virtualElements } from 'tko.utils';\nimport { AsyncBindingHandler, applyBindings, bindingContext, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\nimport { computed } from 'tko.computed';\n\n// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving\n// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)\n//\n// Two are provided by default:\n//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element\n//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but\n//                                           without reading/writing the actual element text content, since it will be overwritten\n//                                           with the rendered template output.\n// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.\n// Template sources need to have the following functions:\n//   text() \t\t\t- returns the template text from your storage location\n//   text(value)\t\t- writes the supplied template text to your storage location\n//   data(key)\t\t\t- reads values stored using data(key, value) - see below\n//   data(key, value)\t- associates \"value\" with this template and the key \"key\". Is used to store information like \"isRewritten\".\n//\n// Optionally, template sources can also have the following functions:\n//   nodes()            - returns a DOM element containing the nodes of this template, where available\n//   nodes(value)       - writes the given DOM element to your storage location\n// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()\n// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().\n//\n// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were\n// using and overriding \"makeTemplateSource\" to return an instance of your custom template source.\n\n// ---- ko.templateSources.domElement -----\n\n// template types\nvar templateScript = 1;\nvar templateTextArea = 2;\nvar templateTemplate = 3;\nvar templateElement = 4;\n\nfunction domElement(element) {\n    this.domElement = element;\n\n    if (!element) { return; }\n    var tagNameLower$$1 = tagNameLower(element);\n    this.templateType =\n        tagNameLower$$1 === \"script\" ? templateScript :\n        tagNameLower$$1 === \"textarea\" ? templateTextArea :\n            // For browsers with proper <template> element support, where the .content property gives a document fragment\n        tagNameLower$$1 == \"template\" && element.content && element.content.nodeType === 11 ? templateTemplate :\n        templateElement;\n}\n\ndomElement.prototype.text = function(/* valueToWrite */) {\n    var elemContentsProperty = this.templateType === templateScript ? \"text\"\n                             : this.templateType === templateTextArea ? \"value\"\n                             : \"innerHTML\";\n\n    if (arguments.length == 0) {\n        return this.domElement[elemContentsProperty];\n    } else {\n        var valueToWrite = arguments[0];\n        if (elemContentsProperty === \"innerHTML\")\n            setHtml(this.domElement, valueToWrite);\n        else\n            this.domElement[elemContentsProperty] = valueToWrite;\n    }\n};\n\nvar dataDomDataPrefix = domData.nextKey() + \"_\";\ndomElement.prototype.data = function(key /*, valueToWrite */) {\n    if (arguments.length === 1) {\n        return domData.get(this.domElement, dataDomDataPrefix + key);\n    } else {\n        domData.set(this.domElement, dataDomDataPrefix + key, arguments[1]);\n    }\n};\n\nvar templatesDomDataKey = domData.nextKey();\nfunction getTemplateDomData(element) {\n    return domData.get(element, templatesDomDataKey) || {};\n}\nfunction setTemplateDomData(element, data) {\n    domData.set(element, templatesDomDataKey, data);\n}\n\ndomElement.prototype.nodes = function(/* valueToWrite */) {\n    var element = this.domElement;\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(element),\n            containerData = templateData.containerData;\n        return containerData || (\n            this.templateType === templateTemplate ? element.content :\n            this.templateType === templateElement ? element :\n            undefined);\n    } else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(element, {containerData: valueToWrite});\n    }\n};\n\n// ---- ko.templateSources.anonymousTemplate -----\n// Anonymous templates are normally saved/retrieved as DOM nodes through \"nodes\".\n// For compatibility, you can also read \"text\"; it will be serialized from the nodes on demand.\n// Writing to \"text\" is still supported, but then the template data will not be available as DOM nodes.\n\nfunction anonymousTemplate(element) {\n    this.domElement = element;\n}\n\nanonymousTemplate.prototype = new domElement();\nanonymousTemplate.prototype.constructor = anonymousTemplate;\nanonymousTemplate.prototype.text = function(/* valueToWrite */) {\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(this.domElement);\n        if (templateData.textData === undefined && templateData.containerData)\n            templateData.textData = templateData.containerData.innerHTML;\n        return templateData.textData;\n    } else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(this.domElement, {textData: valueToWrite});\n    }\n};\n\n// If you want to make a custom template engine,\n//\n// [1] Inherit from this class (like ko.nativeTemplateEngine does)\n// [2] Override 'renderTemplateSource', supplying a function with this signature:\n//\n//        function (templateSource, bindingContext, options) {\n//            // - templateSource.text() is the text of the template you should render\n//            // - bindingContext.$data is the data you should pass into the template\n//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,\n//            //     and bindingContext.$root available in the template too\n//            // - options gives you access to any other properties set on \"data-bind: { template: options }\"\n//            // - templateDocument is the document object of the template\n//            //\n//            // Return value: an array of DOM nodes\n//        }\n//\n// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:\n//\n//        function (script) {\n//            // Return value: Whatever syntax means \"Evaluate the JavaScript statement 'script' and output the result\"\n//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'\n//        }\n//\n//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.\n//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)\n//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.\n\nfunction templateEngine() { }\n\nextend(templateEngine.prototype, {\n  renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n      options$$1.onError(\"Override renderTemplateSource\");\n  },\n\n  createJavaScriptEvaluatorBlock: function (script) {\n      options.onError(\"Override createJavaScriptEvaluatorBlock\");\n  },\n\n  makeTemplateSource: function(template, templateDocument) {\n      // Named template\n      if (typeof template == \"string\") {\n          templateDocument = templateDocument || document;\n          var elem = templateDocument.getElementById(template);\n          if (!elem)\n              options.onError(\"Cannot find template with ID \" + template);\n          return new domElement(elem);\n      } else if ((template.nodeType == 1) || (template.nodeType == 8)) {\n          // Anonymous template\n          return new anonymousTemplate(template);\n      } else\n          options.onError(\"Unknown template type: \" + template);\n  },\n\n  renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {\n      var templateSource = this['makeTemplateSource'](template, templateDocument);\n      return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);\n  }\n});\n\nvar _templateEngine;\n\nfunction setTemplateEngine (tEngine) {\n  if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {\n        // TODO: ko.templateEngine to appropriate name\n    throw new Error('templateEngine must inherit from ko.templateEngine')\n  }\n  _templateEngine = tEngine;\n}\n\nfunction invokeForEachNodeInContinuousRange (firstNode, lastNode, action) {\n  let node;\n  let nextInQueue = firstNode;\n  let firstOutOfRangeNode = virtualElements.nextSibling(lastNode);\n  while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {\n    nextInQueue = virtualElements.nextSibling(node);\n    action(node, nextInQueue);\n  }\n}\n\nfunction activateBindingsOnContinuousNodeArray (continuousNodeArray, bindingContext$$1, afterBindingCallback) {\n  // To be used on any nodes that have been rendered by a template and have been inserted into some parent element\n  // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because\n  // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,\n  // (1) Does a regular \"applyBindings\" to associate bindingContext with this node and to activate any non-memoized bindings\n  // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)\n\n  if (continuousNodeArray.length) {\n    var firstNode = continuousNodeArray[0];\n    var lastNode = continuousNodeArray[continuousNodeArray.length - 1];\n    var parentNode = firstNode.parentNode;\n    var provider = options.bindingProviderInstance;\n    var preprocessNode = provider.preprocessNode;\n\n    if (preprocessNode) {\n      invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {\n        var nodePreviousSibling = node.previousSibling;\n        var newNodes = preprocessNode.call(provider, node);\n        if (newNodes) {\n          if (node === firstNode) { firstNode = newNodes[0] || nextNodeInRange; }\n          if (node === lastNode) { lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling; }\n        }\n      });\n\n      // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.\n      // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real\n      // first node needs to be in the array).\n      continuousNodeArray.length = 0;\n      if (!firstNode) { // preprocessNode might have removed all the nodes, in which case there's nothing left to do\n        return\n      }\n      if (firstNode === lastNode) {\n        continuousNodeArray.push(firstNode);\n      } else {\n        continuousNodeArray.push(firstNode, lastNode);\n        fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n      }\n    }\n\n    // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)\n    // whereas a regular applyBindings won't introduce new memoized nodes\n    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n      if (node.nodeType === 1 || node.nodeType === 8) { applyBindings(bindingContext$$1, node).then(afterBindingCallback); }\n    });\n    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n      if (node.nodeType === 1 || node.nodeType === 8) { memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]); }\n    });\n\n    // Make sure any changes done by applyBindings or unmemoize are reflected in the array\n    fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n  }\n}\n\nfunction getFirstNodeFromPossibleArray (nodeOrNodeArray) {\n  return nodeOrNodeArray.nodeType ? nodeOrNodeArray\n                                    : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]\n                                    : null\n}\n\nfunction executeTemplate (targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {\n  options$$1 = options$$1 || {};\n  var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n  var templateDocument = (firstTargetNode || template || {}).ownerDocument;\n  var templateEngineToUse = (options$$1.templateEngine || _templateEngine);\n  var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);\n\n    // Loosely check result is an array of DOM nodes\n  if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) { throw new Error('Template engine must return an array of DOM nodes') }\n\n  var haveAddedNodesToParent = false;\n  switch (renderMode) {\n    case 'replaceChildren':\n      virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);\n      haveAddedNodesToParent = true;\n      break\n    case 'replaceNode':\n      replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);\n      haveAddedNodesToParent = true;\n      break\n    case 'ignoreTargetNode': break\n    default:\n      throw new Error('Unknown renderMode: ' + renderMode)\n  }\n\n  if (haveAddedNodesToParent) {\n    activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);\n    if (options$$1.afterRender) { dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]); }\n  }\n\n  return renderedNodesArray\n}\n\nfunction resolveTemplateName (template, data, context) {\n    // The template can be specified as:\n  if (isObservable(template)) {\n    // 1. An observable, with string value\n    return template()\n  } else if (typeof template === 'function') {\n    // 2. A function of (data, context) returning a string\n    return template(data, context)\n  } else {\n    // 3. A string\n    return template\n  }\n}\n\nfunction renderTemplate (template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {\n  options$$1 = options$$1 || {};\n  if ((options$$1.templateEngine || _templateEngine) === undefined) { throw new Error('Set a template engine before calling renderTemplate') }\n  renderMode = renderMode || 'replaceChildren';\n\n  if (targetNodeOrNodeArray) {\n    var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n\n    var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode) }; // Passive disposal (on next evaluation)\n    var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;\n\n    return computed( // So the DOM is automatically updated when any dependency changes\n      function () {\n        // Ensure we've got a proper binding context to work with\n        var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))\n              ? dataOrBindingContext\n              : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });\n\n        var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);\n        const renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);\n\n        if (renderMode === 'replaceNode') {\n          targetNodeOrNodeArray = renderedNodesArray;\n          firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n        }\n      },\n      null,\n      { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }\n    )\n  } else {\n        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node\n    return memoization.memoize(function (domNode) {\n      renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');\n    })\n  }\n}\n\nfunction renderTemplateForEach (template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {\n    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then\n    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.\n  var arrayItemContext;\n\n    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode\n  function executeTemplateForArrayItem (arrayValue, index) {\n        // Support selecting template as a function of the data being rendered\n    arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {\n      context['$index'] = index;\n    });\n\n    var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);\n    return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback)\n  }\n\n    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode\n  var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {\n    activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);\n    if (options$$1['afterRender']) { options$$1['afterRender'](addedNodesArray, arrayValue); }\n\n        // release the \"cache\" variable, so that it can be collected by\n        // the GC when its value isn't used from within the bindings anymore.\n    arrayItemContext = null;\n  };\n\n  return computed(function () {\n    var unwrappedArray = unwrap(arrayOrObservableArray) || [];\n    if (typeof unwrappedArray.length !== 'number') { unwrappedArray = [unwrappedArray]; }\n\n    // Filter out any entries marked as destroyed\n    var filteredArray = arrayFilter(unwrappedArray, function (item) {\n      return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy'])\n    });\n\n    // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).\n    // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.\n    dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);\n  }, null, { disposeWhenNodeIsRemoved: targetNode })\n}\n\nlet templateComputedDomDataKey = domData.nextKey();\n\nclass TemplateBindingHandler extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    const element = this.$element;\n    const bindingValue = unwrap(this.value);\n    let container;\n\n    // Expose 'conditional' for `else` chaining.\n    domData.set(element, 'conditional', {\n      elseChainSatisfied: observable(true)\n    });\n\n    // Support anonymous templates\n    if (typeof bindingValue === 'string' || bindingValue.name) {\n            // It's a named template - clear the element\n      virtualElements.emptyNode(element);\n    } else if ('nodes' in bindingValue) {\n            // We've been given an array of DOM nodes. Save them as the template source.\n            // There is no known use case for the node array being an observable array (if the output\n            // varies, put that behavior *into* your template - that's what templates are for), and\n            // the implementation would be a mess, so assert that it's not observable.\n      var nodes = bindingValue.nodes || [];\n      if (isObservable(nodes)) {\n        throw new Error('The \"nodes\" option must be a plain, non-observable array.')\n      }\n      container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent\n      new anonymousTemplate(element)['nodes'](container);\n    } else {\n            // It's an anonymous template - store the element contents, then clear the element\n      const templateNodes = virtualElements.childNodes(element);\n      container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent\n      new anonymousTemplate(element).nodes(container);\n    }\n    this.computed(this.onValueChange.bind(this));\n  }\n\n  onValueChange () {\n    const element = this.$element;\n    const bindingContext$$1 = this.$context;\n    var value = this.value;\n    var options$$1 = unwrap(value);\n    var shouldDisplay = true;\n    var templateComputed = null;\n    var elseChainSatisfied = domData.get(element, 'conditional').elseChainSatisfied;\n    var templateName;\n\n    if (typeof options$$1 === 'string') {\n      templateName = value;\n      options$$1 = {};\n    } else {\n      templateName = options$$1.name;\n\n      // Support \"if\"/\"ifnot\" conditions\n      if ('if' in options$$1) {\n        shouldDisplay = unwrap(options$$1.if);\n      }\n\n      if (shouldDisplay && 'ifnot' in options$$1) {\n        shouldDisplay = !unwrap(options$$1.ifnot);\n      }\n    }\n\n    if ('foreach' in options$$1) {\n      // Render once for each data point (treating data set as empty if shouldDisplay==false)\n      var dataArray = (shouldDisplay && options$$1.foreach) || [];\n      templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);\n\n      elseChainSatisfied((unwrap(dataArray) || []).length !== 0);\n    } else if (shouldDisplay) {\n      // Render once for this single data point (or use the viewModel if no data was provided)\n      var innerBindingContext = ('data' in options$$1)\n        ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as)  // Given an explitit 'data' value, we create a child binding context for it\n        : bindingContext$$1;                                                        // Given no explicit 'data' value, we retain the same binding context\n      templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);\n      elseChainSatisfied(true);\n    } else {\n      virtualElements.emptyNode(element);\n      elseChainSatisfied(false);\n    }\n\n    // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)\n    this.disposeOldComputedAndStoreNewOne(element, templateComputed);\n  }\n\n  disposeOldComputedAndStoreNewOne (element, newComputed) {\n    let oldComputed = domData.get(element, templateComputedDomDataKey);\n    if (oldComputed && (typeof oldComputed.dispose === 'function')) { oldComputed.dispose(); }\n    domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nfunction nativeTemplateEngine () {\n}\n\nnativeTemplateEngine.prototype = new templateEngine();\nnativeTemplateEngine.prototype.constructor = nativeTemplateEngine;\nnativeTemplateEngine.prototype.renderTemplateSource = function(templateSource, bindingContext$$1, options$$1, templateDocument) {\n    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly\n        templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null,\n        templateNodes = templateNodesFunc ? templateSource.nodes() : null;\n\n    if (templateNodes) {\n        return makeArray(templateNodes.cloneNode(true).childNodes);\n    } else {\n        var templateText = templateSource.text();\n        return parseHtmlFragment(templateText, templateDocument);\n    }\n};\n\n\nnativeTemplateEngine.instance = new nativeTemplateEngine();\nsetTemplateEngine(nativeTemplateEngine.instance);\n\n// \"foreach: someExpression\" is equivalent to \"template: { foreach: someExpression }\"\n// \"foreach: { data: someExpression, afterAdd: myfn }\" is equivalent to \"template: { foreach: someExpression, afterAdd: myfn }\"\nclass TemplateForEachBindingHandler extends TemplateBindingHandler {\n  get value () {\n    const modelValue = this.valueAccessor();\n    const unwrappedValue = peek(modelValue);    // Unwrap without setting a dependency here\n\n        // If unwrappedValue is the array, pass in the wrapped value on its own\n        // The value will be unwrapped and tracked within the template binding\n        // (See https://github.com/SteveSanderson/knockout/issues/523)\n    if (!unwrappedValue || typeof unwrappedValue.length === 'number') {\n      return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance }\n    }\n\n    // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates\n    unwrap(modelValue);\n    return {\n      foreach: unwrappedValue.data,\n      as: unwrappedValue.as,\n      includeDestroyed: unwrappedValue.includeDestroyed,\n      afterAdd: unwrappedValue.afterAdd,\n      beforeRemove: unwrappedValue.beforeRemove,\n      afterRender: unwrappedValue.afterRender,\n      beforeMove: unwrappedValue.beforeMove,\n      afterMove: unwrappedValue.afterMove,\n      templateEngine: nativeTemplateEngine.instance\n    }\n  }\n}\n\n//    'let': letBinding,\n//    template: template,\n\nconst bindings = {\n  foreach: TemplateForEachBindingHandler,\n  template: TemplateBindingHandler\n};\n\nexport { bindings, nativeTemplateEngine, templateEngine, setTemplateEngine, renderTemplate, TemplateBindingHandler, domElement, anonymousTemplate };\n//# sourceMappingURL=tko.binding.template.es6.js.map\n","import { cleanNode, cloneNodes, domData, virtualElements } from 'tko.utils';\nimport { dependencyDetection, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\n\n/**\n * Test a node for whether it represents an \"else\" condition.\n * @param  {HTMLElement}  node to be tested\n * @return {Boolean}      true when\n *\n * Matches <!-- else -->\n */\nfunction isElseNode (node) {\n  return node.nodeType === 8 &&\n        node.nodeValue.trim().toLowerCase() === 'else'\n}\n\nfunction detectElse (element) {\n  var children = virtualElements.childNodes(element);\n  for (var i = 0, j = children.length; i < j; ++i) {\n    if (isElseNode(children[i])) { return true }\n  }\n  return false\n}\n\n/**\n * Clone the nodes, returning `ifNodes`, `elseNodes`\n * @param  {HTMLElement} element The nodes to be cloned\n * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.\n * @return {object}         Containing the cloned nodes.\n */\nfunction cloneIfElseNodes (element, hasElse) {\n  const children = virtualElements.childNodes(element);\n  const ifNodes = [];\n  const elseNodes = [];\n  let target = ifNodes;\n\n  for (var i = 0, j = children.length; i < j; ++i) {\n    if (hasElse && isElseNode(children[i])) {\n      target = elseNodes;\n      hasElse = false;\n    } else {\n      target.push(cleanNode(children[i].cloneNode(true)));\n    }\n  }\n\n  return { ifNodes, elseNodes }\n}\n\n/**\n * Create a DOMbinding that controls DOM nodes presence\n *\n * Covers e.g.\n *\n * 1. DOM Nodes contents\n *\n * <div data-bind='if: x'>\n * <!-- else --> ... an optional \"if\"\n * </div>\n *\n * 2. Virtual elements\n *\n * <!-- ko if: x -->\n * <!-- else -->\n * <!-- /ko -->\n *\n * 3. Else binding\n * <div data-bind='if: x'></div>\n * <div data-bind='else'></div>\n */\nclass ConditionalBindingHandler extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    this.hasElse = detectElse(this.$element);\n    const elseChainSatisfied = this.completesElseChain = observable();\n\n    domData.set(this.$element, 'conditional', { elseChainSatisfied });\n\n    this.computed(this.render.bind(this));\n  }\n\n  get elseChainIsAlreadySatisfied () { return false }\n  get needsRefresh () {\n    return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate\n  }\n  get shouldDisplayIf () { return !!unwrap(this.value) }\n\n  getIfElseNodes () {\n    if (this.ifElseNodes) { return this.ifElseNodes }\n    if (dependencyDetection.getDependenciesCount() || this.hasElse) {\n      return cloneIfElseNodes(this.$element, this.hasElse)\n    }\n  }\n\n  render () {\n    // Create any dependencies on values created in value-functions.\n    if (typeof this.value === 'function') { this.value(); }\n    const isFirstRender = !this.ifElseNodes;\n    let shouldDisplayIf = this.shouldDisplayIf;\n    let needsRefresh = this.needsRefresh;\n\n    if (this.elseChainIsAlreadySatisfied) {\n      shouldDisplayIf = false;\n      needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;\n      this.completesElseChain(true);\n    } else {\n      this.completesElseChain(this.shouldDisplayIf);\n    }\n\n    if (!needsRefresh) { return }\n\n    this.ifElseNodes = this.getIfElseNodes();\n\n    if (shouldDisplayIf) {\n      if (!isFirstRender || this.hasElse) {\n        virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));\n      }\n    } else if (this.ifElseNodes) {\n      virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));\n    } else {\n      virtualElements.emptyNode(this.$element);\n    }\n\n    applyBindingsToDescendants(this.bindingContext, this.$element)\n      .then(this.completeBinding);\n\n    this.didDisplayOnLastUpdate = shouldDisplayIf;\n  }\n\n  get bindingContext () { return this.$context }\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nclass IfBindingHandler extends ConditionalBindingHandler {}\n\nclass UnlessBindingHandler extends ConditionalBindingHandler {\n  get shouldDisplayIf () { return !super.shouldDisplayIf }\n}\n\nclass ElseBindingHandler extends ConditionalBindingHandler {\n  get shouldDisplayIf () { return super.shouldDisplayIf || this.value === undefined }\n\n  /**\n   * Return any conditional that precedes the given node.\n   * @return {object}      { elseChainSatisfied: observable }\n   */\n  get elseChainIsAlreadySatisfied () {\n    if (!this._elseChain) { this._elseChain = this.readElseChain(); }\n    return unwrap(this._elseChain.elseChainSatisfied)\n  }\n\n  readElseChain () {\n    let node = this.$element;\n    do {\n      node = node.previousSibling;\n    } while (node && node.nodeType !== 1 && node.nodeType !== 8)\n\n    if (!node) { return false }\n\n    if (node.nodeType === 8) {\n      node = virtualElements.previousSibling(node);\n    }\n\n    return domData.get(node, 'conditional') || {}\n  }\n}\n\nclass WithBindingHandler extends ConditionalBindingHandler {\n  get needsRefresh () { return true }\n  get bindingContext () {\n    return this.$context.createStaticChildContext(this.value)\n  }\n}\n\nconst bindings = {\n  'if': IfBindingHandler,\n  'with': WithBindingHandler,\n  ifnot: UnlessBindingHandler,\n  unless: UnlessBindingHandler,\n  'else': ElseBindingHandler,\n  'elseif': ElseBindingHandler\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.if.es6.js.map\n","import { arrayForEach, cleanNode, createSymbolOrString, domData, domNodeIsContainedBy, options, virtualElements } from 'tko.utils';\nimport { isObservable, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants, contextFor } from 'tko.bind';\n\n// index.js\n// --------\n// Fast For Each\n//\n// Employing sound techniques to make a faster Knockout foreach binding.\n// --------\n\n//      Utilities\nconst MAX_LIST_SIZE = 9007199254740991;\n\n// from https://github.com/jonschlinkert/is-plain-object\nfunction isPlainObject (o) {\n  return !!o && typeof o === 'object' && o.constructor === Object\n}\n\nconst supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';\n\n// Get a copy of the (possibly virtual) child nodes of the given element,\n// put them into a container, then empty the given node.\nfunction makeTemplateNode (sourceNode) {\n  var container = document.createElement('div');\n  var parentNode;\n  if (sourceNode.content) {\n    // For e.g. <template> tags\n    parentNode = sourceNode.content;\n  } else if (sourceNode.tagName === 'SCRIPT') {\n    parentNode = document.createElement('div');\n    parentNode.innerHTML = sourceNode.text;\n  } else {\n    // Anything else e.g. <div>\n    parentNode = sourceNode;\n  }\n  arrayForEach(virtualElements.childNodes(parentNode), function (child) {\n    // FIXME - This cloneNode could be expensive; we may prefer to iterate over the\n    // parentNode children in reverse (so as not to foul the indexes as childNodes are\n    // removed from parentNode when inserted into the container)\n    if (child) {\n      container.insertBefore(child.cloneNode(true), null);\n    }\n  });\n  return container\n}\n\n// Mimic a KO change item 'add'\nfunction valueToChangeAddItem (value, index) {\n  return {\n    status: 'added',\n    value: value,\n    index: index\n  }\n}\n\n// store a symbol for caching the pending delete info index in the data item objects\nconst PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');\n\n// Extend the given context with a $index (passed in via the createChildContext)\nfunction extend$context (include$index, $context) {\n  if (include$index) { $context.$index = observable(); }\n  $context.$list = this.data;\n}\n\nclass ForEachBinding extends AsyncBindingHandler {\n  // NOTE: valid valueAccessors include:\n  //    []\n  //    observable([])\n  //    observableArray([])\n  //    computed\n  //    {data: array, name: string, as: string}\n\n  constructor (params) {\n    super(params);\n    const settings = {};\n    if (isPlainObject(this.value)) {\n      Object.assign(settings, this.value);\n    }\n\n    this.noIndex = settings.noIndex || this.allBindings.get('noIndex');\n    this.as = settings.as || this.allBindings.get('as');\n\n    this.data = settings.data || (unwrap(this.$context.$rawData) === this.value ? this.$context.$rawData : this.value);\n\n    this.container = virtualElements.isStartComment(this.$element)\n                     ? this.$element.parentNode : this.$element;\n    this.generateContext = this.createContextGenerator(this.as, !this.noIndex);\n    if (this.noIndex) { this.updateIndexes = false; }\n\n    this.templateNode = makeTemplateNode(\n      settings.templateNode || (settings.name\n        ? document.getElementById(settings.name).cloneNode(true)\n        : this.$element)\n    )\n\n    ;['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']\n      .forEach(p => { this[p] = settings[p] || this.allBindings.get(p); });\n\n    this.changeQueue = [];\n    this.firstLastNodesList = [];\n    this.indexesToDelete = [];\n    this.rendering_queued = false;\n    this.pendingDeletes = [];\n\n    // Expose the conditional so that if the `foreach` data is empty, successive\n    // 'else' bindings will appear.\n    this.isNotEmpty = observable(Boolean(unwrap(this.data).length));\n    domData.set(this.$element, 'conditional', {\n      elseChainSatisfied: this.isNotEmpty\n    });\n\n    // Remove existing content.\n    virtualElements.emptyNode(this.$element);\n\n    // Prime content\n    const primeData = unwrap(this.data);\n    if (primeData.map) {\n      this.onArrayChange(primeData.map(valueToChangeAddItem), true);\n    } else {\n      this.completeBinding();\n    }\n\n    // Watch for changes\n    if (isObservable(this.data)) {\n      if (!this.data.indexOf) {\n        // Make sure the observable is trackable.\n        this.data = this.data.extend({ trackArrayChanges: true });\n      }\n      this.changeSubs = this.data.subscribe(this.onArrayChange, this, 'arrayChange');\n    }\n  }\n\n  dispose () {\n    if (this.changeSubs) {\n      this.changeSubs.dispose();\n    }\n    this.flushPendingDeletes();\n  }\n\n  // If the array changes we register the change.\n  onArrayChange (changeSet, isInitial) {\n    var changeMap = {\n      added: [],\n      deleted: []\n    };\n\n    // knockout array change notification index handling:\n    // - sends the original array indexes for deletes\n    // - sends the new array indexes for adds\n    // - sorts them all by index in ascending order\n    // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked\n    for (var i = 0, len = changeSet.length; i < len; i++) {\n      if (changeMap.added.length && changeSet[i].status === 'added') {\n        var lastAdd = changeMap.added[changeMap.added.length - 1];\n        var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;\n        if (lastIndex + 1 === changeSet[i].index) {\n          if (!lastAdd.isBatch) {\n            // transform the last addition into a batch addition object\n            lastAdd = {\n              isBatch: true,\n              status: 'added',\n              index: lastAdd.index,\n              values: [lastAdd.value]\n            };\n            changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);\n          }\n          lastAdd.values.push(changeSet[i].value);\n          continue\n        }\n      }\n\n      changeMap[changeSet[i].status].push(changeSet[i]);\n    }\n\n    if (changeMap.deleted.length > 0) {\n      this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);\n      this.changeQueue.push({ status: 'clearDeletedIndexes' });\n    }\n\n    this.changeQueue.push.apply(this.changeQueue, changeMap.added);\n    // Once a change is registered, the ticking count-down starts for the processQueue.\n    if (this.changeQueue.length > 0 && !this.rendering_queued) {\n      this.rendering_queued = true;\n      if (isInitial) {\n        this.processQueue();\n      } else {\n        ForEachBinding.animateFrame.call(window, () => this.processQueue());\n      }\n    }\n  }\n\n  startQueueFlush () {\n    // Callback so folks can do things before the queue flush.\n    if (typeof this.beforeQueueFlush === 'function') {\n      this.beforeQueueFlush(this.changeQueue);\n    }\n  }\n\n  endQueueFlush () {\n    // Callback so folks can do things.\n    if (typeof this.afterQueueFlush === 'function') {\n      this.afterQueueFlush(this.changeQueue);\n    }\n  }\n\n  // Reflect all the changes in the queue in the DOM, then wipe the queue.\n  processQueue () {\n    var isEmpty = !unwrap(this.data).length;\n    var lowestIndexChanged = MAX_LIST_SIZE;\n\n    this.startQueueFlush();\n\n    arrayForEach(this.changeQueue, (changeItem) => {\n      if (typeof changeItem.index === 'number') {\n        lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);\n      }\n      this[changeItem.status](changeItem);\n    });\n    this.flushPendingDeletes();\n    this.rendering_queued = false;\n\n    // Update our indexes.\n    if (this.updateIndexes) { this.updateIndexes(lowestIndexChanged); }\n\n    this.endQueueFlush();\n    this.changeQueue = [];\n\n    // Update the conditional exposed on the domData\n    if (isEmpty !== !this.isNotEmpty()) {\n      this.isNotEmpty(!isEmpty);\n    }\n  }\n\n  /**\n   * Return a function that generates the context for a given node.\n   *\n   * We generate a single function that reduces our inner-loop calculations,\n   * which has a good chance of being optimized by the browser.\n   *\n   * @param  {string} as  The name given to each item in the list\n   * @param  {bool} index Whether to calculate indexes\n   * @return {function}   A function(dataValue) that returns the context\n   */\n  createContextGenerator (as, index) {\n    var $context = this.$context;\n    switch ((as && 1) | (index && 2)) {\n      case 0: // no-as & no-index\n        return function (v) {\n          return $context.createChildContext(v, null, extend$context.bind(this, false))\n        }\n\n      case 1: // as + no-index\n        return function (v) {\n          var obj = { $index: undefined, $list: this.data };\n          obj[as] = v;\n          return $context.extend(obj)\n        }\n\n      case 2: // no-as + index\n        return function (v) {\n          return $context.createChildContext(v, null, extend$context.bind(this, true))\n        }\n\n      case 3: // as + index\n        return function (v) {\n          var obj = { $index: observable(), $list: this.data };\n          obj[as] = v;\n          return $context.extend(obj)\n        }\n    }\n  }\n\n  // Process a changeItem with {status: 'added', ...}\n  added (changeItem) {\n    var index = changeItem.index;\n    var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];\n    var referenceElement = this.getLastNodeBeforeIndex(index);\n    // gather all childnodes for a possible batch insertion\n    const allChildNodes = [];\n    const asyncBindingResults = [];\n    var children;\n\n    for (var i = 0, len = valuesToAdd.length; i < len; ++i) {\n      // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset\n      var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);\n      if (pendingDelete && pendingDelete.nodesets.length) {\n        children = pendingDelete.nodesets.pop();\n      } else {\n        var templateClone = this.templateNode.cloneNode(true);\n        // Apply bindings first, and then process child nodes,\n        // because bindings can add childnodes.\n        const bindingResult = applyBindingsToDescendants(\n          this.generateContext(valuesToAdd[i]), templateClone\n        );\n\n        asyncBindingResults.push(bindingResult);\n\n        children = virtualElements.childNodes(templateClone);\n      }\n\n      // Note discussion at https://github.com/angular/angular.js/issues/7851\n      allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));\n      this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });\n    }\n\n    if (typeof this.afterAdd === 'function') {\n      this.afterAdd({\n        nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),\n        foreachInstance: this\n      });\n    } else {\n      this.insertAllAfter(allChildNodes, referenceElement);\n    }\n\n    this.completeBinding(options.Promise.all(asyncBindingResults));\n  }\n\n  getNodesForIndex (index) {\n    let result = [];\n    let ptr = this.firstLastNodesList[index].first;\n    let last = this.firstLastNodesList[index].last;\n    result.push(ptr);\n    while (ptr && ptr !== last) {\n      ptr = ptr.nextSibling;\n      result.push(ptr);\n    }\n    return result\n  }\n\n  getLastNodeBeforeIndex (index) {\n    if (index < 1 || index - 1 >= this.firstLastNodesList.length) { return null }\n    return this.firstLastNodesList[index - 1].last\n  }\n\n  /**\n   * Get the active (focused) node, if it's a child of the given node.\n   */\n  activeChildElement (node) {\n    var active = document.activeElement;\n    if (domNodeIsContainedBy(active, node)) {\n      return active\n    }\n  }\n\n  insertAllAfter (nodeOrNodeArrayToInsert, insertAfterNode) {\n    let frag;\n    let len;\n    let i;\n    let active = null;\n    let containerNode = this.$element;\n\n    // Poor man's node and array check.\n    if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {\n      throw new Error('Expected a single node or a node array')\n    }\n    if (nodeOrNodeArrayToInsert.nodeType !== undefined) {\n      active = this.activeChildElement(nodeOrNodeArrayToInsert);\n      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);\n      return [nodeOrNodeArrayToInsert]\n    } else if (nodeOrNodeArrayToInsert.length === 1) {\n      active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);\n      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);\n    } else if (supportsDocumentFragment) {\n      frag = document.createDocumentFragment();\n      for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {\n        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n        frag.appendChild(nodeOrNodeArrayToInsert[i]);\n      }\n      virtualElements.insertAfter(containerNode, frag, insertAfterNode);\n    } else {\n      // Nodes are inserted in reverse order - pushed down immediately after\n      // the last node for the previous item or as the first node of element.\n      for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {\n        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n        var child = nodeOrNodeArrayToInsert[i];\n        if (!child) { break }\n        virtualElements.insertAfter(containerNode, child, insertAfterNode);\n      }\n    }\n\n    if (active) { active.focus(); }\n\n    return nodeOrNodeArrayToInsert\n  }\n\n  // checks if the deleted data item should be handled with delay for a possible reuse at additions\n  shouldDelayDeletion (data) {\n    return data && (typeof data === 'object' || typeof data === 'function')\n  }\n\n  // gets the pending deletion info for this data item\n  getPendingDeleteFor (data) {\n    var index = data && data[PENDING_DELETE_INDEX_SYM];\n    if (index === undefined) return null\n    return this.pendingDeletes[index]\n  }\n\n  // tries to find the existing pending delete info for this data item, and if it can't, it registeres one\n  getOrCreatePendingDeleteFor (data) {\n    var pd = this.getPendingDeleteFor(data);\n    if (pd) {\n      return pd\n    }\n    pd = {\n      data: data,\n      nodesets: []\n    };\n    data[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;\n    this.pendingDeletes.push(pd);\n    return pd\n  }\n\n  // Process a changeItem with {status: 'deleted', ...}\n  deleted (changeItem) {\n    // if we should delay the deletion of this data, we add the nodeset to the pending delete info object\n    if (this.shouldDelayDeletion(changeItem.value)) {\n      let pd = this.getOrCreatePendingDeleteFor(changeItem.value);\n      pd.nodesets.push(this.getNodesForIndex(changeItem.index));\n    } else { // simple data, just remove the nodes\n      this.removeNodes(this.getNodesForIndex(changeItem.index));\n    }\n    this.indexesToDelete.push(changeItem.index);\n  }\n\n  // removes a set of nodes from the DOM\n  removeNodes (nodes) {\n    if (!nodes.length) { return }\n\n    function removeFn () {\n      var parent = nodes[0].parentNode;\n      for (var i = nodes.length - 1; i >= 0; --i) {\n        cleanNode(nodes[i]);\n        parent.removeChild(nodes[i]);\n      }\n    }\n\n    if (this.beforeRemove) {\n      var beforeRemoveReturn = this.beforeRemove({\n        nodesToRemove: nodes, foreachInstance: this\n      }) || {};\n      // If beforeRemove returns a `then`–able e.g. a Promise, we remove\n      // the nodes when that thenable completes.  We pass any errors to\n      // ko.onError.\n      if (typeof beforeRemoveReturn.then === 'function') {\n        beforeRemoveReturn.then(removeFn, options.onError);\n      }\n    } else {\n      removeFn();\n    }\n  }\n\n  // flushes the pending delete info store\n  // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up\n  // we also call it on dispose not to leave any mess\n  flushPendingDeletes () {\n    for (let i = 0, len = this.pendingDeletes.length; i !== len; ++i) {\n      var pd = this.pendingDeletes[i];\n      while (pd.nodesets.length) {\n        this.removeNodes(pd.nodesets.pop());\n      }\n      if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) { delete pd.data[PENDING_DELETE_INDEX_SYM]; }\n    }\n    this.pendingDeletes = [];\n  }\n\n  // We batch our deletion of item indexes in our parallel array.\n  // See brianmhunt/knockout-fast-foreach#6/#8\n  clearDeletedIndexes () {\n    // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine\n    // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.\n    for (let i = this.indexesToDelete.length - 1; i >= 0; --i) {\n      this.firstLastNodesList.splice(this.indexesToDelete[i], 1);\n    }\n    this.indexesToDelete = [];\n  }\n\n  updateIndexes (fromIndex) {\n    let ctx;\n    for (let i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {\n      ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);\n      if (ctx) { ctx.$index(i); }\n    }\n  }\n\n  getContextStartingFrom (node) {\n    let ctx;\n    while (node) {\n      ctx = contextFor(node);\n      if (ctx) { return ctx }\n      node = node.nextSibling;\n    }\n  }\n\n  /**\n   * Set whether the binding is always synchronous.\n   * Useful during testing.\n   */\n  static setSync (toggle) {\n    const w = options.global;\n    if (toggle) {\n      ForEachBinding.animateFrame = function (frame) { frame(); };\n    } else {\n      ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||\n        w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||\n        function (cb) { return w.setTimeout(cb, 1000 / 60) };\n    }\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n\n  /* TODO: Remove; for legacy/testing */\n  static get ForEach () { return this }\n  static get PENDING_DELETE_INDEX_SYM () { return PENDING_DELETE_INDEX_SYM }\n}\n\nvar bindings = {\n  foreach: ForEachBinding\n};\n\n// By default, foreach will be async.\nForEachBinding.setSync(false);\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.foreach.es6.js.map\n","import { toJS, unwrap } from 'tko.observable';\n\nvar sproto = String.prototype;\n\nvar filters = {};\n\n// Convert value to uppercase\nfilters.uppercase = function(value) {\n    return sproto.toUpperCase.call(unwrap(value));\n};\n\n// Convert value to lowercase\nfilters.lowercase = function(value) {\n    return sproto.toLowerCase.call(unwrap(value));\n};\n\n// Return default value if the input value is empty or null\nfilters['default'] = function (value, defaultValue) {\n    value = unwrap(value);\n    if (typeof value === \"function\") {\n        return value;\n    }\n    if (typeof value === \"string\") {\n        return sproto.trim.call(value) === '' ? defaultValue : value;\n    }\n    return value == null || value.length == 0 ? defaultValue : value;\n};\n\n// Return the value with the search string replaced with the replacement string\nfilters.replace = function(value, search, replace) {\n    return sproto.replace.call(unwrap(value), search, replace);\n};\n\nfilters.fit = function(value, length, replacement, trimWhere) {\n    value = unwrap(value);\n    if (length && ('' + value).length > length) {\n        replacement = '' + (replacement || '...');\n        length = length - replacement.length;\n        value = '' + value;\n        switch (trimWhere) {\n            case 'left':\n                return replacement + value.slice(-length);\n            case 'middle':\n                var leftLen = Math.ceil(length / 2);\n                return value.substr(0, leftLen) + replacement + value.slice(leftLen-length);\n            default:\n                return value.substr(0, length) + replacement;\n        }\n    } else {\n        return value;\n    }\n};\n\n// Convert a model object to JSON\nfilters.json = function(rootObject, space, replacer) {\n       // replacer and space are optional\n    return JSON.stringify(toJS(rootObject), replacer, space);\n};\n\n// Format a number using the browser's toLocaleString\nfilters.number = function(value) {\n    return (+unwrap(value)).toLocaleString();\n};\n\nexport { filters };\n//# sourceMappingURL=tko.filter.punches.es6.js.map\n","import { cloneNodes, makeArray, virtualElements } from 'tko.utils';\nimport { unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\nimport { LifeCycle } from 'tko.lifecycle';\nimport registry from 'tko.utils.component';\n\n//\n// Binding Handler for Components\n//\n\nvar componentLoadingOperationUniqueId = 0;\n\nclass ComponentBinding extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    this.originalChildNodes = makeArray(\n      virtualElements.childNodes(this.$element)\n    );\n    this.computed('computeApplyComponent');\n  }\n\n  cloneTemplateIntoElement (componentName, componentDefinition, element) {\n    const template = componentDefinition['template'];\n    if (!template) {\n      throw new Error('Component \\'' + componentName + '\\' has no template')\n    }\n    const clonedNodesArray = cloneNodes(template);\n    virtualElements.setDomNodeChildren(element, clonedNodesArray);\n  }\n\n  createViewModel (componentDefinition, element, originalChildNodes, componentParams) {\n    const componentViewModelFactory = componentDefinition.createViewModel;\n    return componentViewModelFactory\n      ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })\n      : componentParams // Template-only component\n  }\n\n  computeApplyComponent () {\n    const value = unwrap(this.value);\n    let componentName;\n    let componentParams;\n\n    if (typeof value === 'string') {\n      componentName = value;\n    } else {\n      componentName = unwrap(value['name']);\n      componentParams = unwrap(value['params']);\n    }\n\n    this.latestComponentName = componentName;\n\n    if (!componentName) {\n      throw new Error('No component name specified')\n    }\n\n    this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;\n    registry.get(componentName, (defn) => this.applyComponentDefinition(componentName, componentParams, defn));\n  }\n\n  applyComponentDefinition (componentName, componentParams, componentDefinition) {\n    // If this is not the current load operation for this element, ignore it.\n    if (this.currentLoadingOperationId !== this.loadingOperationId ||\n        this.latestComponentName !== componentName) { return }\n\n    // Clean up previous state\n    this.cleanUpState();\n\n    const element = this.$element;\n\n    // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.\n    if (!componentDefinition) {\n      throw new Error('Unknown component \\'' + componentName + '\\'')\n    }\n    this.cloneTemplateIntoElement(componentName, componentDefinition, element);\n\n    const componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);\n\n    if (componentViewModel instanceof LifeCycle) {\n      componentViewModel.anchorTo(this.$element);\n    }\n\n    const ctxExtender = (ctx) => Object.assign(ctx, {\n      $component: componentViewModel,\n      $componentTemplateNodes: this.originalChildNodes\n    });\n\n    const childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);\n    this.currentViewModel = componentViewModel;\n\n    applyBindingsToDescendants(childBindingContext, this.$element)\n      .then(this.completeBinding);\n  }\n\n  cleanUpState () {\n    const currentView = this.currentViewModel;\n    const currentViewDispose = currentView && currentView.dispose;\n    if (typeof currentViewDispose === 'function') {\n      currentViewDispose.call(currentView);\n    }\n    this.currentViewModel = null;\n    // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion\n    this.currentLoadingOperationId = null;\n  }\n\n  dispose () {\n    this.cleanUpState();\n    super.dispose();\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nvar bindings = { component: ComponentBinding };\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.component.es6.js.map\n","/* eslint semi: 0 */\nimport * as utils from 'tko.utils'\n\nimport {\n    // applyExtenders,\n    // arrayChangeEventName,\n    // deferUpdates,\n    dependencyDetection,\n    extenders,\n    isObservable,\n    isSubscribable,\n    isWriteableObservable,\n    observable,\n    observableArray,\n    peek,\n    subscribable,\n    toJS,\n    toJSON,\n    unwrap\n} from 'tko.observable'\n\nimport {\n    computed,\n    isComputed,\n    isPureComputed,\n    pureComputed\n} from 'tko.computed'\n\nimport { VirtualProvider } from 'tko.provider.virtual'\nimport { DataBindProvider } from 'tko.provider.databind'\nimport { ComponentProvider } from 'tko.provider.component'\nimport { AttributeProvider } from 'tko.provider.attr'\nimport { MultiProvider } from 'tko.provider.multi'\nimport {\n  TextMustacheProvider, AttributeMustacheProvider\n} from 'tko.provider.mustache'\n\nimport {\n    applyBindingAccessorsToNode,\n    applyBindings,\n    applyBindingsToDescendants,\n    applyBindingsToNode,\n    contextFor,\n    dataFor,\n    getBindingHandler,\n    BindingHandler,\n    AsyncBindingHandler,\n    setDomNodeChildrenFromArrayMapping\n} from 'tko.bind';\n\nimport {\n    bindings as coreBindings\n} from 'tko.binding.core';\n\nimport {\n    anonymousTemplate,\n    bindings as templateBindings,\n    domElement,\n    nativeTemplateEngine,\n    renderTemplate,\n    setTemplateEngine,\n    templateEngine\n    // templateSources\n} from 'tko.binding.template';\n\nimport {\n    bindings as ifBindings\n} from 'tko.binding.if';\n\nimport {\n    bindings as foreachBindings\n} from 'tko.binding.foreach';\n\nimport {\n  filters as punchesFilters\n} from 'tko.filter.punches';\n\nimport {\n  bindings as componentBindings\n} from 'tko.binding.component'\n\nimport components from 'tko.utils.component'\n\nvar coreUtils = {}\n\nutils.arrayForEach([\n  'extend',\n  'setTimeout',\n  'arrayForEach',\n  'arrayFirst',\n  'arrayFilter',\n  'arrayGetDistinctValues',\n  'arrayIndexOf',\n  'arrayMap',\n  'arrayPushAll',\n  'arrayRemoveItem',\n  'getFormFields',\n  'peekObservable',\n  'postJson',\n  'parseJson',\n  'registerEventHandler',\n  'stringifyJson',\n  'range',\n  'toggleDomNodeCssClass',\n  'triggerEvent',\n  'unwrapObservable',\n  'objectForEach',\n  'addOrRemoveItem',\n  'setTextContent',\n  'domData',\n  'parseHtmlFragment',\n  'setHtml',\n  'compareArrays',\n  'setDomNodeChildrenFromArrayMapping'\n], function (coreUtil) {\n  coreUtils[coreUtil] = utils[coreUtil]\n})\n\ncoreUtils.domNodeDisposal = {\n  addDisposeCallback: utils.addDisposeCallback,\n  otherNodeCleanerFunctions: utils.otherNodeCleanerFunctions,\n  removeDisposeCallback: utils.removeDisposeCallback,\n  removeNode: utils.removeNode\n}\n\nutils.extend(coreUtils, {\n  setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,\n  unwrapObservable: unwrap,\n  peekObservable: peek\n})\n\n// Create the binding provider and default bindings.\nconst provider = new MultiProvider({\n  globals: utils.options.bindingGlobals,\n  providers: [\n    new AttributeMustacheProvider(),\n    new TextMustacheProvider(),\n    new ComponentProvider(),\n    new DataBindProvider(),\n    new VirtualProvider(),\n    new AttributeProvider()\n  ]\n})\n\nutils.options.bindingProviderInstance = provider\n\nprovider.bindingHandlers.set(coreBindings)\nprovider.bindingHandlers.set(templateBindings)\nprovider.bindingHandlers.set(ifBindings)\nprovider.bindingHandlers.set(foreachBindings)\nprovider.bindingHandlers.set({ each: foreachBindings.foreach })\nprovider.bindingHandlers.set(componentBindings)\n\nObject.assign(utils.options.filters, punchesFilters);\n\n// Expose the API.\nexport default {\n    // --- Top-level ---\n  version: '{{VERSION}}',\n  options: utils.options,\n\n  extenders: extenders,\n  filters: utils.options.filters,\n  Component: components.ComponentABC,\n\n    // --- Utilities ---\n  cleanNode: utils.cleanNode,\n  memoization: utils.memoization,\n  removeNode: utils.removeNode,\n  tasks: utils.tasks,\n  utils: coreUtils,\n  dependencyDetection,\n  ignoreDependencies: dependencyDetection.ignore,\n\n    // -- Observable ---\n  isObservable,\n  isSubscribable,\n  isWriteableObservable,\n  isWritableObservable: isWriteableObservable,\n  observable,\n  observableArray,\n  peek,\n  subscribable,\n  unwrap,\n  toJS,\n  toJSON,\n\n    // ... 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\ No newline at end of file
diff --git a/packages/tko/dist/tko.es6.min.js b/packages/tko/dist/tko.es6.min.js
new file mode 100644
index 00000000..d6e4a2c2
--- /dev/null
+++ b/packages/tko/dist/tko.es6.min.js
@@ -0,0 +1,3 @@
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Ti{constructor(e,n,t){this.token=n,this.dereferences=t,this.parser=e}dereference(e,t,o,a){let s,d=this.dereferences||[];const r=t.$data||{};let l,p,i;for(p=0,i=d.length;p<i;++p)s=Ci.value_of(d[p],t,o,a),'function'==typeof e&&d[p]instanceof Di?(e=e.apply(l||r,s),l=e):(l=e,e=Ci.value_of(e[s],t,o,a));return'function'==typeof e&&0<i&&l!==e&&!l.hasOwnProperty(s)?e.bind(l):e}get_value(e,n,t,i){const o=e&&!(e instanceof Ti)?Ci.value_of(e,n,t,i)[this.token]:n.lookup(this.token,t,i);return this.dereference(o,n,t,i)}assign(e,n,t){Ge(e[n])?e[n](t):!Qe(e[n])&&(e[n]=t)}set_value(e,t,o){const a=t.$data||{},s=this.dereferences||[];let d,i,n,r=this.token;if(Object.hasOwnProperty.call(a,r))n=a;else if(Object.hasOwnProperty.call(t,r))n=t;else if(Object.hasOwnProperty.call(o,r))n=o;else throw new Error('Identifier::set_value -- The property \''+r+'\' does not exist on the $data, $context, or globals.');if(i=s.length,0===i)return void this.assign(n,r,e);for(n=n[r],d=0;d<i-1;++d)r=s[d],n=r instanceof Di?n():n[Ci.value_of(r)];if(!0===s[d])throw new Error('Cannot assign a value to a function.');s[d]&&this.assign(n,Ci.value_of(s[d]),e)}static is_valid_start_char(e){return Si.test(e)}static is_valid_continue_char(e){return _i.test(e)}get[Ci.isExpressionOrIdentifierSymbol](){return!0}}class Ii{constructor(e,n){Object.assign(this,{yes:e,no:n})}get_value(){return this}get[Ci.isExpressionOrIdentifierSymbol](){return!0}}const ki={"'":'\'','"':'"',"`":'`',"\\":'\\',"/":'/',$:'$',b:'\b',f:'\f',n:'\n',r:'\r',t:'\t'};class wi{white(){for(var e=this.ch;e&&' '>=e;)e=this.next();return this.comment(e)}comment(e){if('/'!==e)return e;var n=this.at,t=this.lookahead();if('/'===t){for(;e&&(e=this.next(),'\n'!==e&&'\r'!==e););e=this.next()}else if('*'===t){for(;e;)if(e=this.next(),'*'===e&&'/'===this.lookahead()){this.next();break}return e||this.error('Unclosed comment, starting at character '+n),this.next(),this.white()}return e}next(e){return e&&e!==this.ch&&this.error('Expected \''+e+'\' but got 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'+n))}objectAddValue(e,n,t){t&&t[Ci.isExpressionOrIdentifierSymbol]?Object.defineProperty(e,n,{get:()=>Ci.value_of(t,...this.currentContextGlobals),enumerable:!0}):Array.isArray(t)?Object.defineProperty(e,n,{get:()=>t.map((e)=>Ci.value_of(e,...this.currentContextGlobals)),enumerable:!0}):e[n]=t}object(){let e,n={},t=this.ch;if('{'===t){if(this.next('{'),t=this.white(),'}'===t)return t=this.next('}'),n;for(;t;){if(e='"'===t||'\''===t||'`'===t?this.string():this.name(),this.white(),t=this.next(':'),Object.hasOwnProperty.call(n,e)&&this.error('Duplicate key "'+e+'"'),this.objectAddValue(n,e,this.expression()),t=this.white(),'}'===t)return t=this.next('}'),n;this.next(','),t=this.white()}}this.error('Bad object')}readString(e){for(let n,t,i,o='',a=[''],s=xi['+'],d='`'===e,r=this.next();r;){if(r===e)return r=this.next(),d&&a.push(s),a.push(o),a;if('\\'!==r)d&&'$'===r?(r=this.next(),'{'===r?(this.next('{'),a.push(s),a.push(o),a.push(s),a.push(this.expression()),o=''):o+='$'+r):o+=r;else if(r=this.next(),'u'===r){for(i=0,t=0;4>t&&(n=parseInt(r=this.next(),16),!!isFinite(n));t+=1)i=16*i+n;o+=String.fromCharCode(i)}else if('string'==typeof ki[r])o+=ki[r];else break;r=this.next()}this.error('Bad string')}string(){var e=this.ch;return'"'===e?this.readString('"').join(''):'\''===e?this.readString('\'').join(''):'`'===e?Ci.create_root(this.readString('`')):void this.error('Bad string')}array(){let e=[],n=this.ch;if('['===n){if(n=this.next('['),this.white(),']'===n)return n=this.next(']'),e;for(;n;){if(e.push(this.expression()),n=this.white(),']'===n)return n=this.next(']'),e;this.next(','),n=this.white()}}this.error('Bad array')}value(){var e;return this.white(),e=this.ch,'{'===e?this.object():'['===e?this.array():'"'===e||'\''===e||'`'===e?this.string():'-'===e?this.number():'0'<=e&&'9'>=e?this.number():this.identifier()}operator(e){let n,t='',i=this.white(),o=Ti.is_valid_start_char;for(;i&&!(o(i)||' 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0),t.push(n),o=this.white()),'('===o?(this.next(),t.push(this.expression()),this.next(')')):t.push(this.value()),o=this.white(),':'!==o&&'}'!==o&&','!==o&&']'!==o&&')'!==o&&''!==o&&'`'!==o&&('|'!==o||'|'!==e));){if('|'===o&&'|'!==this.lookahead()&&e){t.push(this.filter()),t.push(void 0);break}if(n=this.operator({not_an_array:!0}),n===xi['?']){this.ternary(t);break}else n===xi['.']?(t.push(n),t.push(this.member()),n=null):n===xi['[']?(t.push(n),t.push(this.expression()),o=this.next(']'),n=null):n&&t.push(n);if(o=this.white(),']'===o||!n&&'('===o)break}if(0!==t.length){var a=this.dereferences();if(1===t.length&&!a.length)return t[0];for(var s,d=0,i=a.length;d<i;++d)s=a[d],s.constructor===Di?t.push(xi.call):t.push(xi['.']),t.push(s);return new Ei(t)}}ternary(e){var n=new Ii;n.yes=this.expression(),this.next(':'),n.no=this.expression(),e.push(xi['?']),e.push(n)}funcArguments(){for(let e=[],n=this.next('(');n;){if(n=this.white(),')'===n)return this.next(')'),new Di(this,e);e.push(this.expression()),n=this.white(),')'!==n&&this.next(',')}this.error('Bad arguments to function')}member(){let e='',n=this.white(),t=Ti.is_valid_start_char;for(;n&&!!t(n);)e+=n,n=this.next(),t=Ti.is_valid_continue_char;return e}dereference(){for(let e,n=this.white();n;){if('('===n)return this.funcArguments();if('['===n)return this.next('['),e=this.expression(),this.white(),this.next(']'),e;if('.'===n)return this.next('.'),this.member();break}}dereferences(){let e,n=this.white(),t=[];for(;n&&(e=this.dereference(),void 0!==e);)t.push(e);return t}identifier(){let e='',n=Ti.is_valid_start_char,t=this.white();for(;t&&!!n(t);)e+=t,t=this.next(),n=Ti.is_valid_continue_char;switch(e){case'true':return!0;case'false':return!1;case'null':return null;case'undefined':return;case'function':throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.');}return new Ti(this,e,this.dereferences())}readBindings(){let e,n,t,i={},o=this.ch;for(;o;)e=this.name(),n=this.white(),n&&','!==n?(-1===e.indexOf('.')?(o=this.next(':'),i[e]&&'object'==typeof i[e]&&i[e].constructor===Object?(t=this.expression(!0),'object'!=typeof t||t.constructor!==Object?ft.onError('Expected plain object for '+e+' value.'):y(i[e],t)):i[e]=this.expression(!0)):(e=e.split('.'),i[e[0]]=i[e[0]]||{},2===e.length?i[e[0]].constructor!==Object&&ft.onError('Binding '+e[0]+'.'+e[1]+' paired with a non-object.'):ft.onError('Binding '+e+' should have two parts (a.b).'),o=this.next(':'),this.objectAddValue(i[e[0]],e[1],this.expression(!0))),this.white(),o=this.ch?this.next(','):''):(o=n?this.next(','):'',i[e]=null);return i}valueAsAccessor(e,n,t,i){if(!e)return()=>e;if('function'==typeof e)return e;if(e[Ci.isExpressionOrIdentifierSymbol])return()=>Ci.value_of(e,n,t,i);if(Array.isArray(e))return()=>e.map((e)=>Ci.value_of(e,n,t,i));if('function'!=typeof e)return()=>C(e);throw new Error('Value has cannot be converted to accessor: '+e)}convertToAccessors(e,n,t,i){return v(e,(o,a)=>{a instanceof Ti?Object.defineProperty(e,o,{value:function(e,o){const s=a.get_value(void 0,n,t,i);if(0===arguments.length)return s;return o&&o.onlyIfChanged&&e===s?void 0:a.set_value(e,n,t)}}):e[o]=this.valueAsAccessor(a,n,t,i)}),e}runParse(e,n){this.text=(e||'').trim(),this.at=0,this.ch=' ';try{var t=n();return this.white(),this.ch&&this.error('Syntax Error'),t}catch(n){ft.onError(n)}}parse(e,n={},t={},i){if(!e)return()=>null;this.currentContextGlobals=[n,t,i];const o=this.runParse(e,()=>this.readBindings());return this.convertToAccessors(o,n,t,i)}parseExpression(e,n={},t={},i){if(!e)return()=>'';this.currentContextGlobals=[n,t,i];const o=this.runParse(e,()=>this.expression(!0));return this.valueAsAccessor(o,n,t,i)}}var Oi=',"\'{}()/:[\\]',Ai=/"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|\/(?:[^\/\\]|\\.)*\/w*|[^\s:,\/][^,"'{}()\/:[\]]*[^\s,"'{}()\/:[\]]|[^\s]/g,Bi=/[\])"'A-Za-z0-9_$]+$/,Pi={in:1,return:1,typeof:1};class Vi{set(e,n){'string'==typeof e?this[e]=n:'object'==typeof e?(void 0!==n&&ft.onError(new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).'+e)),Object.assign(this,e)):ft.onError(new Error('Given a bad binding handler type: '+e))}get(e){const[n]=e.split('.');return this[n]}}class Ri{constructor(e={}){if(this.constructor===Ri)throw new Error('Provider is an abstract base class.');if(!('FOR_NODE_TYPES'in this))throw new Error('Providers must have FOR_NODE_TYPES property');this.bindingHandlers=e.bindingHandlers||new Vi,this.globals=e.globals||{}}nodeHasBindings(){}getBindingAccessors(){}preprocessNode(){}postProcess(){}}class $i extends Ri{*processBinding(e,n){const[t,i]=e.split('.'),o=this.bindingHandlers.get(t);if(o&&o.preprocess){const t=[];n=o.preprocess(n,e,(...e)=>t.push(e));for(const[e,n]of t)yield*this.processBinding(e,n)}else i&&(n=`{${i}:${n}}`);yield`${t}:${n}`}*generateBindingString(e){for(const{key:n,unknown:t,value:i}of rn(e))yield*this.processBinding(n||t,i)}preProcessBindings(e){return Array.from(this.generateBindingString(e)).join(',')}getBindingAccessors(e,n){const t=e&&this.getBindingString(e);if(t){const i=this.preProcessBindings(t);return new wi().parse(i,n,this.globals,e)}}getBindingString(){throw new Error('Overload getBindingString.')}}class Li extends $i{get FOR_NODE_TYPES(){return[8]}getBindingString(e){if(e.nodeType===document.COMMENT_NODE)return Ut.virtualNodeBindingValue(e)}nodeHasBindings(e){if(e.nodeType===document.COMMENT_NODE)return Ut.isStartComment(e)}}class Fi extends $i{get FOR_NODE_TYPES(){return[1]}get BIND_ATTRIBUTE(){return'data-bind'}getBindingString(e){if(e.nodeType===document.ELEMENT_NODE)return e.getAttribute(this.BIND_ATTRIBUTE)}nodeHasBindings(e){if(e.nodeType===document.ELEMENT_NODE)return e.hasAttribute(this.BIND_ATTRIBUTE)}}const Mi=I('LifeCycle Subscriptions List'),ji=I('LifeCycle Anchor Node');class Wi{static mixInto(e){const n=e.prototype||e,t=Wi.prototype;for(let i of Object.getOwnPropertyNames(t))n[i]=t[i]}subscribe(e,n){'string'==typeof n&&(n=this[n].bind(this)),this.addDisposable(e.subscribe(n))}computed(e){if('string'==typeof e)e={read:this[e],write:this[e],owner:this};else if('object'==typeof e);else if('function'==typeof e)e={read:e,write:e};else throw new Error('LifeCycle::computed not given a valid type.');return e.disposeWhenNodeIsRemoved=this[ji],this.addDisposable(tn(e))}addEventListener(...e){const n=e[0].nodeType?e.shift():this[ji],[t,i,o]=e,a='string'==typeof i?this[i].bind(this):i;this.__addEventListener(n,t,a,o)}__addEventListener(e,n,t,i){function o(){e.removeEventListener(n,t)}e.addEventListener(n,t,i),H(e,o),this.addDisposable({dispose:o})}anchorTo(e){H(e,()=>this.dispose()),this[ji]=e}dispose(){const e=this[Mi]||[];e.forEach((e)=>e.dispose()),this[Mi]=[],this[ji]=null}addDisposable(e){const n=this[Mi]||[];if(this[Mi]||(this[Mi]=n),'function'!=typeof e.dispose)throw new Error('Lifecycle::addDisposable argument missing `dispose`.');return n.push(e),e}}var Ui={},Hi={},Ki={get(e,n){var t=N(Hi,e);t?t.isSynchronousComponent?ui.ignore(function(){n(t.definition)}):w.schedule(function(){n(t.definition)}):ln(e,n)},clearCachedDefinition(e){delete Hi[e]},_getFirstResultFromLoaders:un,loaders:[]},Qi={},zi={getConfig:function(e,n){var t=Qi.hasOwnProperty(e)?Qi[e]:null;n(t)},loadComponent:function(e,n,t){var i=vn(e);yn(i,n,function(n){gn(e,i,n,t)})},loadTemplate:function(e,n,t){hn(vn(e),n,t)},loadViewModel:function(e,n,t){fn(vn(e),n,t)}},qi='createViewModel';Ki.loaders.push(zi);class Gi extends Wi{static get elementName(){throw new Error('[ComponentABC] `elementName` must be overloaded.')}static get template(){return{element:this.element}}static get element(){throw new Error('[ComponentABC] `element` must be overloaded.')}static get sync(){return!0}static register(e=this.elementName){const n=this,{template:t}=this,i=this.sync;cn(e,{viewModel:n,template:t,synchronous:i})}}var Ji={ComponentABC:Gi,get:Ki.get,clearCachedDefinition:Ki.clearCachedDefinition,register:cn,isRegistered:mn,unregister:function(e){delete Qi[e],Ki.clearCachedDefinition(e)},defaultLoader:zi,_allRegisteredComponents:Qi,get loaders(){return Ki.loaders},set loaders(e){Ki.loaders=e}};class Yi extends Ri{get FOR_NODE_TYPES(){return[1]}nodeHasBindings(e){return!!this.getComponentNameForNode(e)}getBindingAccessors(e,n){const t=this.getComponentNameForNode(e);if(t){return{component:()=>({name:t,params:this.getComponentParams(e,n)})}}}getComponentNameForNode(e){if(e.nodeType===e.ELEMENT_NODE){const n=V(e);if(Ji.isRegistered(n)){const t=n.includes('-');if(t||'[object HTMLUnknownElement]'+e)return n}}}getComponentParams(e,n){const t=new wi(e,n,this.globals),i=(e.getAttribute('params')||'').trim(),o=t.parse(i,n,e);if(!o||0===Object.keys(o).length)return{$raw:{}};const a=x(o,(n)=>tn(n,null,{disposeWhenNodeIsRemoved:e})),s=x(a,(n)=>this.makeParamValue(e,n));return Object.assign({$raw:a},s)}makeParamValue(e,n){const t=n.peek();if(!n.isActive())return t;const i=Ge(t);return tn({read:()=>ze(n()),write:i?(e)=>n()(e):null,disposeWhenNodeIsRemoved:e})}}class Xi extends Ri{get FOR_NODE_TYPES(){return[1]}get PREFIX(){return'ko-'}getBindingAttributesList(e){return e.hasAttributes()?Array.from(e.attributes).filter((e)=>e.name.startsWith(this.PREFIX)):[]}nodeHasBindings(e){return 0<this.getBindingAttributesList(e).length}getBindingAccessors(e,n){return Object.assign({},...this.handlersFromAttributes(e,n))}*handlersFromAttributes(e,n){for(const t of this.getBindingAttributesList(e)){const i=t.name.substr(this.PREFIX.length);yield{[i]:()=>this.getValue(t.value,n,e)}}}getValue(e,n,t){if(e){const i=n.$data;switch(e){case'$element':return t;case'$context':return n;case'this':case'$data':return n.$data;}if(i instanceof Object&&e in i)return i[e];if(e in n)return n[e];if(e in this.globals)return this.globals[e];throw new Error(`The variable '${e} not found.`)}}}class Zi extends Ri{get FOR_NODE_TYPES(){return this.nodeTypes}constructor(e={}){super(e);const n=e.providers||[];this.nodeTypeMap={},this.nodeTypes=[],this.providers=[],n.forEach((e)=>this.addProvider(e))}addProvider(e){this.providers.push(e),e.bindingHandlers=this.bindingHandlers,e.globals=this.globals;const n=this.nodeTypeMap;for(const t of e.FOR_NODE_TYPES)n[t]||(n[t]=[]),n[t].push(e);this.nodeTypes=Object.keys(this.nodeTypeMap).map((e)=>parseInt(e,10))}providersFor(e){return this.nodeTypeMap[e.nodeType]||[]}nodeHasBindings(e){return this.providersFor(e).some((n)=>n.nodeHasBindings(e))}preprocessNode(e){for(const n of this.providersFor(e)){const t=n.preprocessNode(e);if(t)return t}}*enumerateProviderBindings(e,n){for(const t of this.providersFor(e)){const i=t.getBindingAccessors(e,n)||{};for(const[e,n]of Object.entries(i||{}))yield[e,n]}}getBindingAccessors(e,n){e=this.preprocessNode(e)||e;const t={};for(const[i,o]of this.enumerateProviderBindings(e,n)){if(i in t)throw new Error(`The binding "${i}" is duplicated by multiple providers`);t[i]=o}return t}}const eo=/^([\s\S]*)}}([\s\S]*?)\{\{([\s\S]*)$/,no=/^([\s\S]*?)\{\{([\s\S]*)}}([\s\S]*)$/,to=/^([^,"'{}()/:[\]\s]+)\s+([^\s:].*)/;class io{constructor(e){this.text=e}trim(e){return null===e?'':e.trim()}}class oo extends io{asAttr(e,n,t){return new wi().parseExpression(this.text,e,n,t)()}*textNodeReplacement(e){const n=this.trim(this.text),t=e?e.ownerDocument:document,i=n[0],o=n[n.length-1];var a,s=!0;if('#'===i){'/'===o?a=n.slice(1,-1):(a=n.slice(1),s=!1);const e=a.match(to);e&&(a=e[1]+':'+e[2])}else if('/'===i);else a='{'===i&&'}'===o?'html:'+this.trim(n.slice(1,-1)):'text:'+this.trim(n);a&&(yield t.createComment('ko '+a)),s&&(yield t.createComment('/ko'))}}class ao extends io{asAttr(){return this.text}*textNodeReplacement(){yield document.createTextNode(this.text.replace(/"/g,'\\"'))}}const so={value:'value',checked:'checked',class:'css'};class ro extends Ri{get FOR_NODE_TYPES(){return[1]}constructor(e={}){super(e),this.ATTRIBUTES_TO_SKIP=new Set(e.attributesToSkip||['data-bind']),this.ATTRIBUTES_BINDING_MAP=e.attributesBindingMap||so}*attributesToInterpolate(e){for(const n of Array.from(e))this.ATTRIBUTES_TO_SKIP.has(n.name)||n.specified&&n.value.includes('{{')&&(yield n)}nodeHasBindings(e){return!this.attributesToInterpolate(e.attributes).next().done}partsTogether(e,n,t,...i){if(1<e.length)return e.map((e)=>ze(e.asAttr(n,this.globals,t))).join('');const o=e[0].asAttr(n,this.globals);return i.length&&o(i[0]),o}attributeBinding(e,n){return[e,n]}*bindingParts(e){for(const n of this.attributesToInterpolate(e.attributes)){const e=Array.from(Cn(n.value));e.length&&(yield this.attributeBinding(n.name,e))}}getPossibleDirectBinding(e){const n=this.ATTRIBUTES_BINDING_MAP[e];return n&&this.bindingHandlers.get(e)}*bindingObjects(e,n){for(const[t,i]of this.bindingParts(e,n)){const o=this.getPossibleDirectBinding(t),a=o?t:`attr.${t}`,s=o?(...t)=>this.partsTogether(i,n,e,...t):(...o)=>({[t]:this.partsTogether(i,n,e,...o)});e.removeAttribute(t),yield{[a]:s}}}getBindingAccessors(e,n){return Object.assign({},...this.bindingObjects(e,n))}}class lo extends Ri{get FOR_NODE_TYPES(){return[3]}*textToNodes(e){const n=e.parentNode,t=n&&'TEXTAREA'===n.nodeName,i=e.nodeValue&&e.nodeValue.includes('{{');if(i&&!t)for(const n of Cn(e.nodeValue))yield*n.textNodeReplacement(e)}textInterpolation(e){const t=Array.from(this.textToNodes(e));if(0!==t.length){if(e.parentNode){const o=e.parentNode,a=t.length;for(let n=0;n<a;++n)o.insertBefore(t[n],e);o.removeChild(e)}return t}}preprocessNode(e){return this.textInterpolation(e)}}var po=wt.nextKey();En.prototype.lookup=function(e,n,t){switch(e){case'$element':return t;case'$context':return this;case'this':case'$data':return this.$data;}const i=this.$data;if(i instanceof Object&&e in i)return i[e];if(e in this)return this[e];if(e in n)return n[e];throw new Error(`The variable "${e}" was not found on $data, $context, or globals.`)},En.prototype.createChildContext=function(e,n,t,i){return new En(e,this,n,function(e,n){e.$parentContext=n,e.$parent=n.$data,e.$parents=(n.$parents||[]).slice(0),e.$parents.unshift(e.$parent),t&&t(e)},i)},En.prototype.extend=function(e){return new En(this._subscribable||this.$data,this,null,function(n,t){n.$rawData=t.$rawData,y(n,'function'==typeof e?e():e)})},En.prototype.createStaticChildContext=function(e,n){return this.createChildContext(e,n,null,{exportDependencies:!0})};class uo extends Wi{constructor(e){super();const{$element:n,valueAccessor:t,allBindings:i,$context:o}=e;Object.assign(this,{valueAccessor:t,allBindings:i,$element:n,$context:o,$data:o.$data}),this.anchorTo(n)}get value(){return this.valueAccessor()}set value(e){return this.valueAccessor(e)}get controlsDescendants(){return!1}static get allowVirtualElements(){return!1}static get isBindingHandlerClass(){return!0}get bindingCompleted(){return!0}static registerAs(e,n=ft.bindingProviderInstance){n.bindingHandlers.set(e,this)}}class co extends uo{constructor(e){super(e),this.bindingCompletion=new ft.Promise((e)=>{this.completeBinding=e})}get bindingCompleted(){return this.bindingCompletion}}const mo=ft.global.WeakMap||Map,go=new mo;class ho extends uo{constructor(n){super(n);const e=this.handler;'function'==typeof e.dispose&&this.addDisposable(e);try{this.initReturn=e.init&&e.init(...this.legacyArgs)}catch(t){n.onError('init',t)}'function'==typeof e.update&&this.computed(()=>{try{e.update(...this.legacyArgs)}catch(t){n.onError('update',t)}})}get legacyArgs(){return[this.$element,this.valueAccessor,this.allBindings,this.$data,this.$context]}get controlsDescendants(){const e=this.initReturn||this.handler||{};return e.controlsDescendantBindings}static getOrCreateFor(e,n){if(go.has(n))return go.get(n);const t=this.createFor(e,n);return go.set(n,t),t}static createFor(e,n){if('function'==typeof n){const[t,i]=[n,n.dispose];return class extends ho{get handler(){const e=t.bind(this),n=i?i.bind(this):null;return{init:e,dispose:n}}static get after(){return n.after}static get allowVirtualElements(){return n.allowVirtualElements||Ut.allowedBindings[e]}}}if('object'==typeof n)return class extends ho{get handler(){return n}static get after(){return n.after}static get allowVirtualElements(){return n.allowVirtualElements||Ut.allowedBindings[e]}};throw new Error('The given handler is not an appropriate type.')}}var fo={script:!0,textarea:!0,template:!0},bo=wt.nextKey(),yo=wt.nextKey(),vo=wt.nextKey(),xo={init:function(e,n,t,i,o){var a=n()||{};v(a,function(a){'string'==typeof a&&J(e,a,function(e){var s,d=n()[a];if(d){try{var 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o;try{o=i.activeElement}catch(n){o=i.body}t=o===e}n(t,{onlyIfChanged:!0}),e[_o]=t,e[So]=!1},i=t.bind(null,!0),o=t.bind(null,!1);J(e,'focus',i),J(e,'focusin',i),J(e,'blur',o),J(e,'focusout',o)},update:function(e,n){var t=!!ze(n());e[So]||e[_o]===t||(t?e.focus():e.blur(),!t&&e[_o]&&e.ownerDocument.body.focus(),ui.ignore(Y,null,[e,t?'focusin':'focusout']))}},Io='__ko__hasDomDataOptionValue__',ko={optionsValueDomDataKey:void 0,readValue:function(e){switch(V(e)){case'option':return!0===e[Io]?wt.get(e,ko.optionValueDomDataKey):e.value;case'select':return 0<=e.selectedIndex?ko.readValue(e.options[e.selectedIndex]):void 0;default:return e.value;}},writeValue:function(e,t,o){switch(V(e)){case'option':switch(typeof t){case'string':wt.set(e,ko.optionValueDomDataKey,void 0),Io in e&&delete e[Io],e.value=t;break;default:wt.set(e,ko.optionValueDomDataKey,t),e[Io]=!0,e.value='number'==typeof t?t:'';}break;case'select':(''===t||null===t)&&(t=void 0);for(var a,s=-1,d=0,i=e.options.length;d<i;++d)if(a=ko.readValue(e.options[d]),a==t||''===a&&void 0===t){s=d;break}(o||0<=s||void 0===t&&1<e.size)&&(e.selectedIndex=s);break;default:(null===t||void 0===t)&&(t=''),e.value=t;}}},wo={};ko.optionValueDomDataKey=wt.nextKey();var Oo,Ao,Bo,Po,Vo,Ro=ft.global;if(Ro.navigator&&(Oo=function(e){if(e)return parseFloat(e[1])},Ao=Ro.opera&&Ro.opera.version&&parseInt(Ro.opera.version()),Bo=Ro.navigator.userAgent,Po=Oo(Bo.match(/^(?:(?!chrome).)*version\/([^ ]*) safari/i)),Vo=Oo(Bo.match(/Firefox\/([^ ]*)/))),10>Nt)var $o=wt.nextKey(),Lo=wt.nextKey(),Fo=function(e){var n=this.activeElement,t=n&&wt.get(n,Lo);t&&t(e)},Mo=function(e,n){var t=e.ownerDocument;wt.get(t,$o)||(wt.set(t,$o,!0),J(t,'selectionchange',Fo)),wt.set(e,Lo,n)};var jo={aliases:'textinput',init:function(n,t){var i,o,a=n.value,s=function(e){clearTimeout(i),o=i=void 0;var s=n.value;a!==s&&(ft.debug&&e&&(n._ko_textInputProcessedEvent=e.type),a=s,t(s))},d=function(e){if(!i){o=n.value;var t=ft.debug?s.bind(n,{type:e.type}):s;i=h(t,4)}},r=9===Nt?d:s,l=function(){var e=ze(t());return(null===e||void 0===e)&&(e=''),void 0!==o&&e===o?void h(l,4):void(n.value!==e&&(a=e,n.value=e))},p=function(e,t){J(n,e,t)};ft.debug&&jo._forceUpdateOn?e(jo._forceUpdateOn,function(e){'after'==e.slice(0,5)?p(e.slice(5),d):p(e,s)}):10>Nt?(p('propertychange',function(e){'value'===e.propertyName&&r(e)}),8==Nt&&(p('keyup',s),p('keydown',s)),8<=Nt&&(Mo(n,r),p('dragend',d))):(p('input',s),5>Po&&'textarea'===V(n)?(p('keydown',d),p('paste',d),p('cut',d)):11>Ao?p('keydown',d):4>Vo&&(p('DOMAutoComplete',s),p('dragdrop',s),p('drop',s))),p('change',s),tn(l,null,{disposeWhenNodeIsRemoved:n})}},Wo={init:function(e,n){if(n()){var t='ko_unique_'+ ++Wo.currentIndex;be(e,t)}},currentIndex:0},Uo={update:function(e,n){var t=ze(n()),i='none'!=e.style.display;t&&!i?e.style.display='':!t&&i&&(e.style.display='none')}},Ho=1,Ko=2,Qo=3,zo=4;Hn.prototype.text=function(){var e=this.templateType===Ho?'text':this.templateType===Ko?'value':'innerHTML';if(0==arguments.length)return this.domElement[e];var n=arguments[0];'innerHTML'==e?Se(this.domElement,n):this.domElement[e]=n};var qo=wt.nextKey()+'_';Hn.prototype.data=function(e){return 1===arguments.length?wt.get(this.domElement,qo+e):void wt.set(this.domElement,qo+e,arguments[1])};var Go=wt.nextKey();Hn.prototype.nodes=function(){var e=this.domElement;if(0==arguments.length){var n=Kn(e),t=n.containerData;return t||(this.templateType===Qo?e.content:this.templateType===zo?e:void 0)}var i=arguments[0];Qn(e,{containerData:i})},zn.prototype=new Hn,zn.prototype.constructor=zn,zn.prototype.text=function(){if(0==arguments.length){var e=Kn(this.domElement);return void 0===e.textData&&e.containerData&&(e.textData=e.containerData.innerHTML),e.textData}var n=arguments[0];Qn(this.domElement,{textData:n})},y(qn.prototype,{renderTemplateSource:function(e,n,t){t.onError('Override 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diff --git a/packages/tko/dist/tko.es6.min.js.map b/packages/tko/dist/tko.es6.min.js.map
new file mode 100644
index 00000000..88e3ea9c
--- /dev/null
+++ b/packages/tko/dist/tko.es6.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"tko.es6.min.js","sources":["../../tko.utils/dist/tko.utils.es6.js","../../tko.observable/dist/tko.observable.es6.js","../../tko.computed/dist/tko.computed.es6.js","../../tko.utils.parser/dist/tko.utils.parser.es6.js","../../tko.utils.component/dist/tko.utils.component.es6.js","../../tko.provider.mustache/dist/tko.provider.mustache.es6.js","../../tko.bind/dist/tko.bind.es6.js","../../tko.binding.template/dist/tko.binding.template.es6.js","../../tko.binding.if/dist/tko.binding.if.es6.js","../../tko.binding.foreach/dist/tko.binding.foreach.es6.js","../../tko.provider/dist/tko.provider.es6.js","../../tko.provider.bindingString/dist/tko.provider.bindingString.es6.js","../../tko.provider.virtual/dist/tko.provider.virtual.es6.js","../../tko.provider.databind/dist/tko.provider.databind.es6.js","../../tko.lifecycle/dist/tko.lifecycle.es6.js","../../tko.provider.component/dist/tko.provider.component.es6.js","../../tko.provider.attr/dist/tko.provider.attr.es6.js","../../tko.provider.multi/dist/tko.provider.multi.es6.js","../../tko.binding.core/dist/tko.binding.core.es6.js","../../tko.filter.punches/dist/tko.filter.punches.es6.js","../../tko.binding.component/dist/tko.binding.component.es6.js","../src/index.js"],"sourcesContent":["//\n// Array utilities\n//\n/* eslint no-cond-assign: 0 */\n\nfunction arrayForEach(array, action) {\n    for (var i = 0, j = array.length; i < j; i++)\n        action(array[i], i);\n}\n\nfunction arrayIndexOf(array, item) {\n    // IE9\n    if (typeof Array.prototype.indexOf == \"function\")\n        return Array.prototype.indexOf.call(array, item);\n    for (var i = 0, j = array.length; i < j; i++)\n        if (array[i] === item)\n            return i;\n    return -1;\n}\n\nfunction arrayFirst(array, predicate, predicateOwner) {\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate.call(predicateOwner, array[i], i))\n            return array[i];\n    return null;\n}\n\nfunction arrayRemoveItem(array, itemToRemove) {\n    var index = arrayIndexOf(array, itemToRemove);\n    if (index > 0) {\n        array.splice(index, 1);\n    }\n    else if (index === 0) {\n        array.shift();\n    }\n}\n\nfunction arrayGetDistinctValues(array) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++) {\n        if (arrayIndexOf(result, array[i]) < 0)\n            result.push(array[i]);\n    }\n    return result;\n}\n\nfunction arrayMap(array, mapping) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        result.push(mapping(array[i], i));\n    return result;\n}\n\nfunction arrayFilter(array, predicate) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate(array[i], i))\n            result.push(array[i]);\n    return result;\n}\n\nfunction arrayPushAll(array, valuesToPush) {\n    if (valuesToPush instanceof Array)\n        array.push.apply(array, valuesToPush);\n    else\n        for (var i = 0, j = valuesToPush.length; i < j; i++)\n            array.push(valuesToPush[i]);\n    return array;\n}\n\nfunction addOrRemoveItem(array, value, included) {\n    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);\n    if (existingEntryIndex < 0) {\n        if (included)\n            array.push(value);\n    } else {\n        if (!included)\n            array.splice(existingEntryIndex, 1);\n    }\n}\n\n\nfunction makeArray(arrayLikeObject) {\n    var result = [];\n    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {\n        result.push(arrayLikeObject[i]);\n    }\n    return result;\n}\n\n\nfunction range(min, max) {\n    min = typeof min === 'function' ? min() : min;\n    max = typeof max === 'function' ? max() : max;\n    var result = [];\n    for (var i = min; i <= max; i++)\n        result.push(i);\n    return result;\n}\n\n// Go through the items that have been added and deleted and try to find matches between them.\nfunction findMovesInArrayComparison(left, right, limitFailedCompares) {\n    if (left.length && right.length) {\n        var failedCompares, l, r, leftItem, rightItem;\n        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {\n            for (r = 0; rightItem = right[r]; ++r) {\n                if (leftItem['value'] === rightItem['value']) {\n                    leftItem['moved'] = rightItem['index'];\n                    rightItem['moved'] = leftItem['index'];\n                    right.splice(r, 1);         // This item is marked as moved; so remove it from right list\n                    failedCompares = r = 0;     // Reset failed compares count because we're checking for consecutive failures\n                    break;\n                }\n            }\n            failedCompares += r;\n        }\n    }\n}\n\n\n\nvar statusNotInOld = 'added';\nvar statusNotInNew = 'deleted';\n\n    // Simple calculation based on Levenshtein distance.\nfunction compareArrays(oldArray, newArray, options) {\n    // For backward compatibility, if the third arg is actually a bool, interpret\n    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.\n    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});\n    oldArray = oldArray || [];\n    newArray = newArray || [];\n\n    if (oldArray.length < newArray.length)\n        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);\n    else\n        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);\n}\n\n\nfunction compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {\n    var myMin = Math.min,\n        myMax = Math.max,\n        editDistanceMatrix = [],\n        smlIndex, smlIndexMax = smlArray.length,\n        bigIndex, bigIndexMax = bigArray.length,\n        compareRange = (bigIndexMax - smlIndexMax) || 1,\n        maxDistance = smlIndexMax + bigIndexMax + 1,\n        thisRow, lastRow,\n        bigIndexMaxForRow, bigIndexMinForRow;\n\n    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {\n        lastRow = thisRow;\n        editDistanceMatrix.push(thisRow = []);\n        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);\n        bigIndexMinForRow = myMax(0, smlIndex - 1);\n        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {\n            if (!bigIndex)\n                thisRow[bigIndex] = smlIndex + 1;\n            else if (!smlIndex)  // Top row - transform empty array into new array via additions\n                thisRow[bigIndex] = bigIndex + 1;\n            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])\n                thisRow[bigIndex] = lastRow[bigIndex - 1];                  // copy value (no edit)\n            else {\n                var northDistance = lastRow[bigIndex] || maxDistance;       // not in big (deletion)\n                var westDistance = thisRow[bigIndex - 1] || maxDistance;    // not in small (addition)\n                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;\n            }\n        }\n    }\n\n    var editScript = [], meMinusOne, notInSml = [], notInBig = [];\n    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {\n        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;\n        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex-1]) {\n            notInSml.push(editScript[editScript.length] = {     // added\n                'status': statusNotInSml,\n                'value': bigArray[--bigIndex],\n                'index': bigIndex });\n        } else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {\n            notInBig.push(editScript[editScript.length] = {     // deleted\n                'status': statusNotInBig,\n                'value': smlArray[--smlIndex],\n                'index': smlIndex });\n        } else {\n            --bigIndex;\n            --smlIndex;\n            if (!options['sparse']) {\n                editScript.push({\n                    'status': \"retained\",\n                    'value': bigArray[bigIndex] });\n            }\n        }\n    }\n\n    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of\n    // smlIndexMax keeps the time complexity of this algorithm linear.\n    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);\n\n    return editScript.reverse();\n}\n\n//\n// This becomes ko.options\n// --\n//\n// This is the root 'options', which must be extended by others.\n\nvar _global;\n\ntry { _global = window; } catch (e) { _global = global; }\n\nvar options = {\n  deferUpdates: false,\n\n  useOnlyNativeEvents: false,\n\n  protoProperty: '__ko_proto__',\n\n    // Modify the default attribute from `data-bind`.\n  defaultBindingAttribute: 'data-bind',\n\n    // Enable/disable <!-- ko binding: ... -> style bindings\n  allowVirtualElements: true,\n\n    // Global variables that can be accessed from bindings.\n  bindingGlobals: _global,\n\n    // An instance of the binding provider.\n  bindingProviderInstance: null,\n\n    // jQuery will be automatically set to _global.jQuery in applyBindings\n    // if it is (strictly equal to) undefined.  Set it to false or null to\n    // disable automatically setting jQuery.\n  jQuery: _global && _global.jQuery,\n\n  Promise: _global && _global.Promise,\n\n  taskScheduler: null,\n\n  debug: false,\n\n  global: _global,\n  document: _global.document,\n\n    // Filters for bindings\n    //   data-bind=\"expression | filter_1 | filter_2\"\n  filters: {},\n\n  onError: function (e) { throw e },\n\n  set: function (name, value) {\n    options[name] = value;\n  }\n};\n\nObject.defineProperty(options, '$', {\n  get: function () { return options.jQuery }\n});\n\n//\n// Error handling\n// ---\n//\n// The default onError handler is to re-throw.\nfunction catchFunctionErrors(delegate) {\n    return options.onError ? function () {\n        try {\n            return delegate.apply(this, arguments);\n        } catch (e) {\n            options.onError(e);\n        }\n    } : delegate;\n}\n\nfunction deferError(error) {\n    safeSetTimeout(function () { options.onError(error); }, 0);\n}\n\n\nfunction safeSetTimeout(handler, timeout) {\n    return setTimeout(catchFunctionErrors(handler), timeout);\n}\n\n//\n// Asynchronous functionality\n// ---\nfunction throttle(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        if (!timeoutInstance) {\n            timeoutInstance = safeSetTimeout(function () {\n                timeoutInstance = undefined;\n                callback();\n            }, timeout);\n        }\n    };\n}\n\nfunction debounce(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        clearTimeout(timeoutInstance);\n        timeoutInstance = safeSetTimeout(callback, timeout);\n    };\n}\n\n//\n// Detection and Workarounds for Internet Explorer\n//\n// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)\n// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.\n// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.\n// If there is a future need to detect specific versions of IE10+, we will amend this.\nvar ieVersion = options.document && (function () {\n  var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');\n\n    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment\n  while (\n        div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',\n        iElems[0]\n    ) {}\n  return version > 4 ? version : undefined\n}());\n\nvar isIe6 = ieVersion === 6;\nvar isIe7 = ieVersion === 7;\n\n//\n// Object functions\n//\n\nfunction extend(target, source) {\n    if (source) {\n        for(var prop in source) {\n            if(source.hasOwnProperty(prop)) {\n                target[prop] = source[prop];\n            }\n        }\n    }\n    return target;\n}\n\nfunction objectForEach(obj, action) {\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            action(prop, obj[prop]);\n        }\n    }\n}\n\n\nfunction objectMap(source, mapping) {\n    if (!source)\n        return source;\n    var target = {};\n    for (var prop in source) {\n        if (source.hasOwnProperty(prop)) {\n            target[prop] = mapping(source[prop], prop, source);\n        }\n    }\n    return target;\n}\n\n\nfunction getObjectOwnProperty(obj, propName) {\n    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;\n}\n\n\nfunction clonePlainObjectDeep(obj, seen) {\n    if (!seen) { seen = []; }\n\n    if (!obj || typeof obj !== 'object'\n        || obj.constructor !== Object\n        || seen.indexOf(obj) !== -1) {\n        return obj;\n    }\n\n    // Anything that makes it below is a plain object that has not yet\n    // been seen/cloned.\n    seen.push(obj);\n\n    var result = {};\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            result[prop] = clonePlainObjectDeep(obj[prop], seen);\n        }\n    }\n    return result;\n}\n\n//\n// Prototype Functions\n//\nvar protoProperty = options.protoProperty;\n\nvar canSetPrototype = ({ __proto__: [] } instanceof Array);\n\nfunction setPrototypeOf(obj, proto) {\n    obj.__proto__ = proto;\n    return obj;\n}\n\nvar setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;\n\nfunction hasPrototype(instance, prototype) {\n    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined)) return false;\n    if (instance[protoProperty] === prototype) return true;\n    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain\n}\n\n//\n// String (and JSON)\n//\n\n\nfunction stringTrim (string) {\n    return string === null || string === undefined ? '' :\n        string.trim ?\n            string.trim() :\n            string.toString().replace(/^[\\s\\xa0]+|[\\s\\xa0]+$/g, '');\n}\n\n\nfunction stringStartsWith (string, startsWith) {\n    string = string || \"\";\n    if (startsWith.length > string.length)\n        return false;\n    return string.substring(0, startsWith.length) === startsWith;\n}\n\n\nfunction parseJson (jsonString) {\n    if (typeof jsonString == \"string\") {\n        jsonString = stringTrim(jsonString);\n        if (jsonString) {\n            if (JSON && JSON.parse) // Use native parsing where available\n                return JSON.parse(jsonString);\n            return (new Function(\"return \" + jsonString))(); // Fallback on less safe parsing for older browsers\n        }\n    }\n    return null;\n}\n\n\nfunction stringifyJson (data, replacer, space) {   // replacer and space are optional\n    if (!JSON || !JSON.stringify)\n        throw new Error(\"Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js\");\n    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);\n}\n\n//\n// ES6 Symbols\n//\n\nvar useSymbols = typeof Symbol === 'function';\n\nfunction createSymbolOrString(identifier) {\n    return useSymbols ? Symbol(identifier) : identifier;\n}\n\n//\n// DOM - CSS\n//\n\n// For details on the pattern for changing node classes\n// see: https://github.com/knockout/knockout/issues/1597\nvar cssClassNameRegex = /\\S+/g;\n\n\nfunction toggleDomNodeCssClass(node, classNames, shouldHaveClass) {\n    var addOrRemoveFn;\n    if (!classNames) { return; }\n    if (typeof node.classList === 'object') {\n        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];\n        arrayForEach(classNames.match(cssClassNameRegex), function(className) {\n            addOrRemoveFn.call(node.classList, className);\n        });\n    } else if (typeof node.className['baseVal'] === 'string') {\n        // SVG tag .classNames is an SVGAnimatedString instance\n        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);\n    } else {\n        // node.className ought to be a string.\n        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);\n    }\n}\n\n\nfunction toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {\n    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.\n    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];\n    arrayForEach(classNames.match(cssClassNameRegex), function(className) {\n        addOrRemoveItem(currentClassNames, className, shouldHaveClass);\n    });\n    obj[prop] = currentClassNames.join(\" \");\n}\n\n//\n// jQuery\n//\n// TODO: deprecate in favour of options.$\n\nvar jQueryInstance = options.global && options.global.jQuery;\n\nfunction jQuerySetInstance(jquery) {\n    options.jQuery = jQueryInstance = jquery;\n}\n\n//\n// Information about the DOM\n//\nfunction domNodeIsContainedBy (node, containedByNode) {\n    if (node === containedByNode)\n        return true;\n    if (node.nodeType === 11)\n        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8\n    if (containedByNode.contains)\n        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);\n    if (containedByNode.compareDocumentPosition)\n        return (containedByNode.compareDocumentPosition(node) & 16) == 16;\n    while (node && node != containedByNode) {\n        node = node.parentNode;\n    }\n    return !!node;\n}\n\nfunction domNodeIsAttachedToDocument (node) {\n    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);\n}\n\nfunction anyDomNodeIsAttachedToDocument(nodes) {\n    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);\n}\n\nfunction tagNameLower(element) {\n    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.\n    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),\n    // we don't need to do the .toLowerCase() as it will always be lower case anyway.\n    return element && element.tagName && element.tagName.toLowerCase();\n}\n\nfunction isDomElement(obj) {\n    if (window.HTMLElement) {\n        return obj instanceof HTMLElement;\n    } else {\n        return obj && obj.tagName && obj.nodeType === 1;\n    }\n}\n\nfunction isDocumentFragment(obj) {\n    if (window.DocumentFragment) {\n        return obj instanceof DocumentFragment;\n    } else {\n        return obj && obj.nodeType === 11;\n    }\n}\n\n//\n// DOM node data\n//\n//\nvar dataStoreKeyExpandoPropertyName = \"__ko__data\" + new Date();\nvar dataStore;\nvar uniqueId = 0;\nvar get;\nvar set;\nvar clear;\n\n/**\n * --- Legacy getter/setter (may cause memory leaks) ---\n */\nfunction getAll(node, createIfNotFound) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== \"null\") && dataStore[dataStoreKey];\n    if (!hasExistingDataStore) {\n        if (!createIfNotFound)\n            return undefined;\n        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = \"ko\" + uniqueId++;\n        dataStore[dataStoreKey] = {};\n    }\n    return dataStore[dataStoreKey];\n}\n\nfunction legacyGet(node, key) {\n    var allDataForNode = getAll(node, false);\n    return allDataForNode === undefined ? undefined : allDataForNode[key];\n}\n\nfunction legacySet(node, key, value) {\n    if (value === undefined) {\n        // Make sure we don't actually create a new domData key if we are actually deleting a value\n        if (getAll(node, false) === undefined)\n            return;\n    }\n    var allDataForNode = getAll(node, true);\n    allDataForNode[key] = value;\n}\n\nfunction legacyClear(node) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    if (dataStoreKey) {\n        delete dataStore[dataStoreKey];\n        node[dataStoreKeyExpandoPropertyName] = null;\n        return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\n    }\n    return false;\n}\n\n/**\n * WeakMap get/set/clear\n */\n\nfunction wmGet(node, key) {\n    return (dataStore.get(node) || {})[key];\n}\n\nfunction wmSet(node, key, value) {\n    var dataForNode;\n    if (dataStore.has(node)) {\n        dataForNode = dataStore.get(node);\n    } else {\n        dataForNode = {};\n        dataStore.set(node, dataForNode);\n    }\n    dataForNode[key] = value;\n}\n\nfunction wmClear (node) {\n  return dataStore.delete(node)\n}\n\n\nif ('WeakMap' in options.global) {\n    dataStore = new WeakMap();\n    get = wmGet;\n    set = wmSet;\n    clear = wmClear;\n} else {\n    dataStore = {};\n    get = legacyGet;\n    set = legacySet;\n    clear = legacyClear;\n}\n\n\n\n/**\n * Create a unique key-string identifier.\n * FIXME: This should be deprecated.\n */\nfunction nextKey() {\n    return (uniqueId++) + dataStoreKeyExpandoPropertyName;\n}\n\n\n\n\n\nvar data = Object.freeze({\n\tnextKey: nextKey,\n\tget get () { return get; },\n\tget set () { return set; },\n\tget clear () { return clear; }\n});\n\n//\n// DOM node disposal\n//\n/* eslint no-cond-assign: 0 */\nvar domDataKey = nextKey();\n// Node types:\n// 1: Element\n// 8: Comment\n// 9: Document\nvar cleanableNodeTypes = { 1: true, 8: true, 9: true };\nvar cleanableNodeTypesWithDescendants = { 1: true, 9: true };\n\nfunction getDisposeCallbacksCollection(node, createIfNotFound) {\n    var allDisposeCallbacks = get(node, domDataKey);\n    if ((allDisposeCallbacks === undefined) && createIfNotFound) {\n        allDisposeCallbacks = [];\n        set(node, domDataKey, allDisposeCallbacks);\n    }\n    return allDisposeCallbacks;\n}\nfunction destroyCallbacksCollection(node) {\n    set(node, domDataKey, undefined);\n}\n\nfunction cleanSingleNode(node) {\n    // Run all the dispose callbacks\n    var callbacks = getDisposeCallbacksCollection(node, false);\n    if (callbacks) {\n        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)\n        for (var i = 0; i < callbacks.length; i++)\n            callbacks[i](node);\n    }\n\n    // Erase the DOM data\n    clear(node);\n\n    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)\n    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {\n        otherNodeCleanerFunctions[i](node);\n    }\n\n    // Clear any immediate-child comment nodes, as these wouldn't have been found by\n    // node.getElementsByTagName(\"*\") in cleanNode() (comment nodes aren't elements)\n    if (cleanableNodeTypesWithDescendants[node.nodeType])\n        cleanImmediateCommentTypeChildren(node);\n}\n\nfunction cleanImmediateCommentTypeChildren(nodeWithChildren) {\n    var child, nextChild = nodeWithChildren.firstChild;\n    while (child = nextChild) {\n        nextChild = child.nextSibling;\n        if (child.nodeType === 8)\n            cleanSingleNode(child);\n    }\n}\n\n// Exports\nfunction addDisposeCallback(node, callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"Callback must be a function\");\n    getDisposeCallbacksCollection(node, true).push(callback);\n}\n\nfunction removeDisposeCallback(node, callback) {\n    var callbacksCollection = getDisposeCallbacksCollection(node, false);\n    if (callbacksCollection) {\n        arrayRemoveItem(callbacksCollection, callback);\n        if (callbacksCollection.length == 0)\n            destroyCallbacksCollection(node);\n    }\n}\n\nfunction cleanNode(node) {\n    // First clean this node, where applicable\n    if (cleanableNodeTypes[node.nodeType]) {\n        cleanSingleNode(node);\n\n        // ... then its descendants, where applicable\n        if (cleanableNodeTypesWithDescendants[node.nodeType]) {\n            // Clone the descendants list in case it changes during iteration\n            var descendants = [];\n            arrayPushAll(descendants, node.getElementsByTagName(\"*\"));\n            for (var i = 0, j = descendants.length; i < j; i++)\n                cleanSingleNode(descendants[i]);\n        }\n    }\n    return node;\n}\n\nfunction removeNode(node) {\n    cleanNode(node);\n    if (node.parentNode)\n        node.parentNode.removeChild(node);\n}\n\n\n// Expose supplemental node cleaning functions.\nvar otherNodeCleanerFunctions = [];\n\n\n// Special support for jQuery here because it's so commonly used.\n// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData\n// so notify it to tear down any resources associated with the node & descendants here.\nfunction cleanjQueryData(node) {\n    var jQueryCleanNodeFn = jQueryInstance\n        ? jQueryInstance.cleanData : null;\n\n    if (jQueryCleanNodeFn) {\n        jQueryCleanNodeFn([node]);\n    }\n}\n\n\notherNodeCleanerFunctions.push(cleanjQueryData);\n\n//\n// DOM Events\n//\n\n// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)\nvar knownEvents = {};\nvar knownEventTypesByEventName = {};\n\nvar keyEventTypeName = (options.global.navigator && /Firefox\\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';\n\nknownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];\n\nknownEvents['MouseEvents'] = [\n    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',\n    'mouseout', 'mouseenter', 'mouseleave'];\n\n\nobjectForEach(knownEvents, function(eventType, knownEventsForType) {\n    if (knownEventsForType.length) {\n        for (var i = 0, j = knownEventsForType.length; i < j; i++)\n            knownEventTypesByEventName[knownEventsForType[i]] = eventType;\n    }\n});\n\n\nfunction isClickOnCheckableElement(element, eventType) {\n    if ((tagNameLower(element) !== \"input\") || !element.type) return false;\n    if (eventType.toLowerCase() != \"click\") return false;\n    var inputType = element.type;\n    return (inputType == \"checkbox\") || (inputType == \"radio\");\n}\n\n\n// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406\nvar eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };\n\nfunction registerEventHandler(element, eventType, handler) {\n    var wrappedHandler = catchFunctionErrors(handler);\n\n    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];\n    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {\n        jQueryInstance(element).bind(eventType, wrappedHandler);\n    } else if (!mustUseAttachEvent && typeof element.addEventListener == \"function\")\n        element.addEventListener(eventType, wrappedHandler, false);\n    else if (typeof element.attachEvent !== \"undefined\") {\n        var attachEventHandler = function (event) { wrappedHandler.call(element, event); },\n            attachEventName = \"on\" + eventType;\n        element.attachEvent(attachEventName, attachEventHandler);\n\n        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)\n        // so to avoid leaks, we have to remove them manually. See bug #856\n        addDisposeCallback(element, function() {\n            element.detachEvent(attachEventName, attachEventHandler);\n        });\n    } else\n        throw new Error(\"Browser doesn't support addEventListener or attachEvent\");\n}\n\nfunction triggerEvent(element, eventType) {\n    if (!(element && element.nodeType))\n        throw new Error(\"element must be a DOM node when calling triggerEvent\");\n\n    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the\n    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)\n    // IE doesn't change the checked state when you trigger the click event using \"fireEvent\".\n    // In both cases, we'll use the click method instead.\n    var useClickWorkaround = isClickOnCheckableElement(element, eventType);\n\n    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {\n        jQueryInstance(element).trigger(eventType);\n    } else if (typeof document.createEvent == \"function\") {\n        if (typeof element.dispatchEvent == \"function\") {\n            var eventCategory = knownEventTypesByEventName[eventType] || \"HTMLEvents\";\n            var event = document.createEvent(eventCategory);\n            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);\n            element.dispatchEvent(event);\n        }\n        else\n            throw new Error(\"The supplied element doesn't support dispatchEvent\");\n    } else if (useClickWorkaround && element.click) {\n        element.click();\n    } else if (typeof element.fireEvent != \"undefined\") {\n        element.fireEvent(\"on\" + eventType);\n    } else {\n        throw new Error(\"Browser doesn't support triggering events\");\n    }\n}\n\n//\n//  DOM node manipulation\n//\nfunction fixUpContinuousNodeArray(continuousNodeArray, parentNode) {\n    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile\n    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that\n    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been\n    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.\n    // So, this function translates the old \"map\" output array into its best guess of the set of current DOM nodes.\n    //\n    // Rules:\n    //   [A] Any leading nodes that have been removed should be ignored\n    //       These most likely correspond to memoization nodes that were already removed during binding\n    //       See https://github.com/knockout/knockout/pull/440\n    //   [B] Any trailing nodes that have been remove should be ignored\n    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]\n    //       See https://github.com/knockout/knockout/pull/1903\n    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,\n    //       and include any nodes that have been inserted among the previous collection\n\n    if (continuousNodeArray.length) {\n        // The parent node can be a virtual element; so get the real parent node\n        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;\n\n        // Rule [A]\n        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)\n            continuousNodeArray.splice(0, 1);\n\n        // Rule [B]\n        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)\n            continuousNodeArray.length--;\n\n        // Rule [C]\n        if (continuousNodeArray.length > 1) {\n            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];\n            // Replace with the actual new continuous node set\n            continuousNodeArray.length = 0;\n            while (current !== last) {\n                continuousNodeArray.push(current);\n                current = current.nextSibling;\n            }\n            continuousNodeArray.push(last);\n        }\n    }\n    return continuousNodeArray;\n}\n\nfunction setOptionNodeSelectionState (optionNode, isSelected) {\n    // IE6 sometimes throws \"unknown error\" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.\n    if (ieVersion < 7)\n        optionNode.setAttribute(\"selected\", isSelected);\n    else\n        optionNode.selected = isSelected;\n}\n\n\nfunction forceRefresh(node) {\n    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209\n    if (ieVersion >= 9) {\n        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container\n        var elem = node.nodeType == 1 ? node : node.parentNode;\n        if (elem.style)\n            elem.style.zoom = elem.style.zoom;\n    }\n}\n\nfunction ensureSelectElementIsRenderedCorrectly(selectElement) {\n    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.\n    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)\n    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)\n    if (ieVersion) {\n        var originalWidth = selectElement.style.width;\n        selectElement.style.width = 0;\n        selectElement.style.width = originalWidth;\n    }\n}\n\n/* eslint no-cond-assign: 0 */\n//\n// Virtual Elements\n//\n//\n// \"Virtual elements\" is an abstraction on top of the usual DOM API which understands the notion that comment nodes\n// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).\n// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state\n// of that virtual hierarchy\n//\n// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)\n// without having to scatter special cases all over the binding and templating code.\n\n// IE 9 cannot reliably read the \"nodeValue\" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)\n// but it does give them a nonstandard alternative property called \"text\" that it can read reliably. Other browsers don't have that property.\n// So, use node.text where available, and node.nodeValue elsewhere\nvar commentNodesHaveTextProperty = options.document && options.document.createComment(\"test\").text === \"<!--test-->\";\n\nvar startCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*ko(?:\\s+([\\s\\S]+))?\\s*-->$/ : /^\\s*ko(?:\\s+([\\s\\S]+))?\\s*$/;\nvar endCommentRegex =   commentNodesHaveTextProperty ? /^<!--\\s*\\/ko\\s*-->$/ : /^\\s*\\/ko\\s*$/;\nvar htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };\n\nfunction isStartComment(node) {\n    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\n\nfunction isEndComment(node) {\n    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\n\nfunction getVirtualChildren(startComment, allowUnbalanced) {\n    var currentNode = startComment;\n    var depth = 1;\n    var children = [];\n    while (currentNode = currentNode.nextSibling) {\n        if (isEndComment(currentNode)) {\n            depth--;\n            if (depth === 0)\n                return children;\n        }\n\n        children.push(currentNode);\n\n        if (isStartComment(currentNode))\n            depth++;\n    }\n    if (!allowUnbalanced)\n        throw new Error(\"Cannot find closing comment tag to match: \" + startComment.nodeValue);\n    return null;\n}\n\nfunction getMatchingEndComment(startComment, allowUnbalanced) {\n    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);\n    if (allVirtualChildren) {\n        if (allVirtualChildren.length > 0)\n            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;\n        return startComment.nextSibling;\n    } else\n        return null; // Must have no matching end comment, and allowUnbalanced is true\n}\n\nfunction getUnbalancedChildTags(node) {\n    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>\n    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->\n    var childNode = node.firstChild, captureRemaining = null;\n    if (childNode) {\n        do {\n            if (captureRemaining)                   // We already hit an unbalanced node and are now just scooping up all subsequent nodes\n                captureRemaining.push(childNode);\n            else if (isStartComment(childNode)) {\n                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);\n                if (matchingEndComment)             // It's a balanced tag, so skip immediately to the end of this virtual set\n                    childNode = matchingEndComment;\n                else\n                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point\n            } else if (isEndComment(childNode)) {\n                captureRemaining = [childNode];     // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n    return captureRemaining;\n}\n\nvar allowedBindings = {};\nvar hasBindingValue = isStartComment;\n\nfunction childNodes(node) {\n    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;\n}\n\nfunction emptyNode(node) {\n    if (!isStartComment(node))\n        emptyDomNode(node);\n    else {\n        var virtualChildren = childNodes(node);\n        for (var i = 0, j = virtualChildren.length; i < j; i++)\n            removeNode(virtualChildren[i]);\n    }\n}\n\nfunction setDomNodeChildren$1(node, childNodes) {\n    if (!isStartComment(node))\n        setDomNodeChildren(node, childNodes);\n    else {\n        emptyNode(node);\n        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children\n        for (var i = 0, j = childNodes.length; i < j; i++)\n            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);\n    }\n}\n\nfunction prepend(containerNode, nodeToPrepend) {\n    if (!isStartComment(containerNode)) {\n        if (containerNode.firstChild)\n            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);\n        else\n            containerNode.appendChild(nodeToPrepend);\n    } else {\n        // Start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);\n    }\n}\n\nfunction insertAfter(containerNode, nodeToInsert, insertAfterNode) {\n    if (!insertAfterNode) {\n        prepend(containerNode, nodeToInsert);\n    } else if (!isStartComment(containerNode)) {\n        // Insert after insertion point\n        if (insertAfterNode.nextSibling)\n            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n        else\n            containerNode.appendChild(nodeToInsert);\n    } else {\n        // Children of start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n    }\n}\n\nfunction firstChild(node) {\n    if (!isStartComment(node)) {\n        return node.firstChild;\n    }\n    if (!node.nextSibling || isEndComment(node.nextSibling)) {\n        return null;\n    }\n    return node.nextSibling;\n}\n\n\nfunction lastChild(node) {\n    var nextChild = firstChild(node),\n        lastChildNode;\n\n    do {\n        lastChildNode = nextChild;\n    } while (nextChild = nextSibling(nextChild));\n\n    return lastChildNode;\n}\n\nfunction nextSibling(node) {\n    if (isStartComment(node))\n        node = getMatchingEndComment(node);\n    if (node.nextSibling && isEndComment(node.nextSibling))\n        return null;\n    return node.nextSibling;\n}\n\nfunction previousSibling(node) {\n    var depth = 0;\n    do {\n        if (node.nodeType === 8) {\n            if (isStartComment(node)) {\n                if (--depth === 0) {\n                    return node;\n                }\n            } else if (isEndComment(node)) {\n                depth++;\n            }\n        } else {\n            if (depth === 0) { return node; }\n        }\n    } while (node = node.previousSibling);\n    return;\n}\n\nfunction virtualNodeBindingValue(node) {\n    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);\n    return regexMatch ? regexMatch[1] : null;\n}\n\nfunction normaliseVirtualElementDomStructure(elementVerified) {\n    // Workaround for https://github.com/SteveSanderson/knockout/issues/155\n    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes\n    // that are direct descendants of <ul> into the preceding <li>)\n    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])\n        return;\n\n    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags\n    // must be intended to appear *after* that child, so move them there.\n    var childNode = elementVerified.firstChild;\n    if (childNode) {\n        do {\n            if (childNode.nodeType === 1) {\n                var unbalancedTags = getUnbalancedChildTags(childNode);\n                if (unbalancedTags) {\n                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child\n                    var nodeToInsertBefore = childNode.nextSibling;\n                    for (var i = 0; i < unbalancedTags.length; i++) {\n                        if (nodeToInsertBefore)\n                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);\n                        else\n                            elementVerified.appendChild(unbalancedTags[i]);\n                    }\n                }\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n}\n\n\nvar virtualElements = Object.freeze({\n\tstartCommentRegex: startCommentRegex,\n\tendCommentRegex: endCommentRegex,\n\tisStartComment: isStartComment,\n\tisEndComment: isEndComment,\n\tgetVirtualChildren: getVirtualChildren,\n\tallowedBindings: allowedBindings,\n\thasBindingValue: hasBindingValue,\n\tchildNodes: childNodes,\n\temptyNode: emptyNode,\n\tsetDomNodeChildren: setDomNodeChildren$1,\n\tprepend: prepend,\n\tinsertAfter: insertAfter,\n\tfirstChild: firstChild,\n\tlastChild: lastChild,\n\tnextSibling: nextSibling,\n\tpreviousSibling: previousSibling,\n\tvirtualNodeBindingValue: virtualNodeBindingValue,\n\tnormaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure\n});\n\n//\n// DOM manipulation\n//\n/* eslint no-empty: 0 */\nfunction moveCleanedNodesToContainerElement(nodes) {\n    // Ensure it's a real array, as we're about to reparent the nodes and\n    // we don't want the underlying collection to change while we're doing that.\n    var nodesArray = makeArray(nodes);\n    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;\n\n    var container = templateDocument.createElement('div');\n    for (var i = 0, j = nodesArray.length; i < j; i++) {\n        container.appendChild(cleanNode(nodesArray[i]));\n    }\n    return container;\n}\n\nfunction cloneNodes (nodesArray, shouldCleanNodes) {\n    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {\n        var clonedNode = nodesArray[i].cloneNode(true);\n        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);\n    }\n    return newNodesArray;\n}\n\nfunction setDomNodeChildren (domNode, childNodes$$1) {\n    emptyDomNode(domNode);\n    if (childNodes$$1) {\n        for (var i = 0, j = childNodes$$1.length; i < j; i++)\n            domNode.appendChild(childNodes$$1[i]);\n    }\n}\n\nfunction replaceDomNodes (nodeToReplaceOrNodeArray, newNodesArray) {\n    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;\n    if (nodesToReplaceArray.length > 0) {\n        var insertionPoint = nodesToReplaceArray[0];\n        var parent = insertionPoint.parentNode;\n        for (var i = 0, j = newNodesArray.length; i < j; i++)\n            parent.insertBefore(newNodesArray[i], insertionPoint);\n        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {\n            removeNode(nodesToReplaceArray[i]);\n        }\n    }\n}\n\nfunction setElementName(element, name) {\n    element.name = name;\n\n    // Workaround IE 6/7 issue\n    // - https://github.com/SteveSanderson/knockout/issues/197\n    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/\n    if (ieVersion <= 7) {\n        try {\n            element.mergeAttributes(document.createElement(\"<input name='\" + element.name + \"'/>\"), false);\n        }\n        catch(e) {} // For IE9 with doc mode \"IE9 Standards\" and browser mode \"IE9 Compatibility View\"\n    }\n}\n\nfunction setTextContent(element, textContent) {\n    var value = typeof textContent === 'function' ? textContent() : textContent;\n    if ((value === null) || (value === undefined))\n        value = \"\";\n\n    // We need there to be exactly one child: a text node.\n    // If there are no children, more than one, or if it's not a text node,\n    // we'll clear everything and create a single text node.\n    var innerTextNode = firstChild(element);\n    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {\n        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);\n    } else {\n        innerTextNode.data = value;\n    }\n\n    forceRefresh(element);\n}\n\nfunction emptyDomNode (domNode) {\n    while (domNode.firstChild) {\n        removeNode(domNode.firstChild);\n    }\n}\n\n//\n// HTML-based manipulation\n//\nvar none = [0, \"\", \"\"];\nvar table = [1, \"<table>\", \"</table>\"];\nvar tbody = [2, \"<table><tbody>\", \"</tbody></table>\"];\nvar colgroup = [ 2, \"<table><tbody></tbody><colgroup>\", \"</colgroup></table>\"];\nvar tr = [3, \"<table><tbody><tr>\", \"</tr></tbody></table>\"];\nvar select = [1, \"<select multiple='multiple'>\", \"</select>\"];\nvar fieldset = [1, \"<fieldset>\", \"</fieldset>\"];\nvar map = [1, \"<map>\", \"</map>\"];\nvar object = [1, \"<object>\", \"</object>\"];\nvar lookup = {\n        'area': map,\n        'col': colgroup,\n        'colgroup': table,\n        'caption': table,\n        'legend': fieldset,\n        'thead': table,\n        'tbody': table,\n        'tfoot': table,\n        'tr': tbody,\n        'td': tr,\n        'th': tr,\n        'option': select,\n        'optgroup': select,\n        'param': object\n    };\nvar supportsTemplateTag = options.document && 'content' in options.document.createElement('template');\n\n\nfunction getWrap(tags) {\n    var m = tags.match(/^<([a-z]+)[ >]/);\n    return (m && lookup[m[1]]) || none;\n}\n\n\nfunction simpleHtmlParse(html, documentContext) {\n    documentContext || (documentContext = document);\n    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;\n\n    // Based on jQuery's \"clean\" function, but only accounting for table-related elements.\n    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's \"clean\" function directly\n\n    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of\n    // a descendant node. For example: \"<div><!-- mycomment -->abc</div>\" will get parsed as \"<div>abc</div>\"\n    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node\n    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.\n\n    // Trim whitespace, otherwise indexOf won't work as expected\n    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement(\"div\"),\n        wrap = getWrap(tags),\n        depth = wrap[0];\n\n    // Go to html and back, then peel off extra wrappers\n    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.\n    var markup = \"ignored<div>\" + wrap[1] + html + wrap[2] + \"</div>\";\n    if (typeof windowContext['innerShiv'] == \"function\") {\n        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding\n        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv\n        // somehow shims the native APIs so it just works anyway)\n        div.appendChild(windowContext['innerShiv'](markup));\n    } else {\n        div.innerHTML = markup;\n    }\n\n    // Move to the right depth\n    while (depth--)\n        div = div.lastChild;\n\n    return makeArray(div.lastChild.childNodes);\n}\n\n\nfunction templateHtmlParse(html, documentContext) {\n    if (!documentContext) { documentContext = document; }\n    var template = documentContext.createElement('template');\n    template.innerHTML = html;\n    return makeArray(template.content.childNodes);\n}\n\n\nfunction jQueryHtmlParse(html, documentContext) {\n    // jQuery's \"parseHTML\" function was introduced in jQuery 1.8.0 and is a documented public API.\n    if (jQueryInstance.parseHTML) {\n        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null\n    } else {\n        // For jQuery < 1.8.0, we fall back on the undocumented internal \"clean\" function.\n        var elems = jQueryInstance.clean([html], documentContext);\n\n        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.\n        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.\n        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.\n        if (elems && elems[0]) {\n            // Find the top-most parent element that's a direct child of a document fragment\n            var elem = elems[0];\n            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)\n                elem = elem.parentNode;\n            // ... then detach it\n            if (elem.parentNode)\n                elem.parentNode.removeChild(elem);\n        }\n\n        return elems;\n    }\n}\n\n\n/**\n * parseHtmlFragment converts a string into an array of DOM Nodes.\n * If supported, it uses <template>-tag parsing, falling back on\n * jQuery parsing (if jQuery is present), and finally on a\n * straightforward parser.\n *\n * @param  {string} html            To be parsed.\n * @param  {Object} documentContext That owns the executing code.\n * @return {[DOMNode]}              Parsed DOM Nodes\n */\nfunction parseHtmlFragment(html, documentContext) {\n    // Prefer <template>-tag based HTML parsing.\n    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :\n\n        // Benefit from jQuery's on old browsers, where possible\n        // NOTE: jQuery's HTML parsing fails on element names like tr-*.\n        // See: https://github.com/jquery/jquery/pull/1988\n        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :\n\n        // ... otherwise, this simple logic will do in most common cases.\n        simpleHtmlParse(html, documentContext));\n}\n\n\n/**\n  * setHtml empties the node's contents, unwraps the HTML, and\n  * sets the node's HTML using jQuery.html or parseHtmlFragment\n  *\n  * @param {DOMNode} node Node in which HTML needs to be set\n  * @param {DOMNode} html HTML to be inserted in node\n  * @returns undefined\n  */\nfunction setHtml(node, html) {\n    emptyDomNode(node);\n\n    // There's few cases where we would want to display a stringified\n    // function, so we unwrap it.\n    if (typeof html === 'function') {\n        html = html();\n    }\n\n    if ((html !== null) && (html !== undefined)) {\n        if (typeof html !== 'string')\n            html = html.toString();\n\n        // If the browser supports <template> tags, prefer that, as\n        // it obviates all the complex workarounds of jQuery.\n        //\n        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,\n        // for example <tr> elements which are not normally allowed to exist on their own.\n        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.\n        if (jQueryInstance && !supportsTemplateTag) {\n            jQueryInstance(node).html(html);\n        } else {\n            // ... otherwise, use KO's own parsing logic.\n            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);\n\n            if (node.nodeType === 8) {\n                if (html === null) {\n                    emptyNode(node);\n                } else {\n                    setDomNodeChildren$1(node, parsedNodes);\n                }\n            } else {\n                for (var i = 0; i < parsedNodes.length; i++)\n                    node.appendChild(parsedNodes[i]);\n            }\n        }\n    }\n}\n\n//\n// Memoization\n//\nvar memos = {};\n\nfunction randomMax8HexChars() {\n    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);\n}\n\nfunction generateRandomId() {\n    return randomMax8HexChars() + randomMax8HexChars();\n}\n\nfunction findMemoNodes(rootNode, appendToArray) {\n    if (!rootNode)\n        return;\n    if (rootNode.nodeType == 8) {\n        var memoId = parseMemoText(rootNode.nodeValue);\n        if (memoId != null)\n            appendToArray.push({ domNode: rootNode, memoId: memoId });\n    } else if (rootNode.nodeType == 1) {\n        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)\n            findMemoNodes(childNodes[i], appendToArray);\n    }\n}\n\n\nfunction memoize(callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"You can only pass a function to memoization.memoize()\");\n    var memoId = generateRandomId();\n    memos[memoId] = callback;\n    return \"<!--[ko_memo:\" + memoId + \"]-->\";\n}\n\nfunction unmemoize(memoId, callbackParams) {\n    var callback = memos[memoId];\n    if (callback === undefined)\n        throw new Error(\"Couldn't find any memo with ID \" + memoId + \". Perhaps it's already been unmemoized.\");\n    try {\n        callback.apply(null, callbackParams || []);\n        return true;\n    }\n    finally { delete memos[memoId]; }\n}\n\nfunction unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {\n    var memos = [];\n    findMemoNodes(domNode, memos);\n    for (var i = 0, j = memos.length; i < j; i++) {\n        var node = memos[i].domNode;\n        var combinedParams = [node];\n        if (extraCallbackParamsArray)\n            arrayPushAll(combinedParams, extraCallbackParamsArray);\n        unmemoize(memos[i].memoId, combinedParams);\n        node.nodeValue = \"\"; // Neuter this node so we don't try to unmemoize it again\n        if (node.parentNode)\n            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)\n    }\n}\n\nfunction parseMemoText(memoText) {\n    var match = memoText.match(/^\\[ko_memo\\:(.*?)\\]$/);\n    return match ? match[1] : null;\n}\n\n\nvar memoization = Object.freeze({\n\tmemoize: memoize,\n\tunmemoize: unmemoize,\n\tunmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,\n\tparseMemoText: parseMemoText\n});\n\n//\n//  Tasks Micro-scheduler\n//  ===\n//\n/* eslint no-cond-assign: 0 */\nvar taskQueue = [];\nvar taskQueueLength = 0;\nvar nextHandle = 1;\nvar nextIndexToProcess = 0;\nvar w = options.global;\n\nif (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {\n    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node\n    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT\n    options.taskScheduler = (function (callback) {\n        var div = w.document.createElement(\"div\");\n        new MutationObserver(callback).observe(div, {attributes: true});\n        return function () { div.classList.toggle(\"foo\"); };\n    })(scheduledProcess);\n} else if (w && w.document && \"onreadystatechange\" in w.document.createElement(\"script\")) {\n    // IE 6-10\n    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT\n    options.taskScheduler = function (callback) {\n        var script = document.createElement(\"script\");\n        script.onreadystatechange = function () {\n            script.onreadystatechange = null;\n            document.documentElement.removeChild(script);\n            script = null;\n            callback();\n        };\n        document.documentElement.appendChild(script);\n    };\n} else {\n    options.taskScheduler = function (callback) {\n        setTimeout(callback, 0);\n    };\n}\n\nfunction processTasks() {\n    if (taskQueueLength) {\n        // Each mark represents the end of a logical group of tasks and the number of these groups is\n        // limited to prevent unchecked recursion.\n        var mark = taskQueueLength, countMarks = 0;\n\n        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue\n        for (var task; nextIndexToProcess < taskQueueLength; ) {\n            if (task = taskQueue[nextIndexToProcess++]) {\n                if (nextIndexToProcess > mark) {\n                    if (++countMarks >= 5000) {\n                        nextIndexToProcess = taskQueueLength;   // skip all tasks remaining in the queue since any of them could be causing the recursion\n                        deferError(Error(\"'Too much recursion' after processing \" + countMarks + \" task groups.\"));\n                        break;\n                    }\n                    mark = taskQueueLength;\n                }\n                try {\n                    task();\n                } catch (ex) {\n                    deferError(ex);\n                }\n            }\n        }\n    }\n}\n\nfunction scheduledProcess() {\n    processTasks();\n\n    // Reset the queue\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n}\n\nfunction scheduleTaskProcessing() {\n    options.taskScheduler(scheduledProcess);\n}\n\n\nfunction schedule(func) {\n    if (!taskQueueLength) {\n        scheduleTaskProcessing();\n    }\n\n    taskQueue[taskQueueLength++] = func;\n    return nextHandle++;\n}\n\nfunction cancel(handle) {\n    var index = handle - (nextHandle - taskQueueLength);\n    if (index >= nextIndexToProcess && index < taskQueueLength) {\n        taskQueue[index] = null;\n    }\n}\n\n// For testing only: reset the queue and return the previous queue length\nfunction resetForTesting() {\n    var length = taskQueueLength - nextIndexToProcess;\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n    return length;\n}\n\n\n\n\nvar tasks = Object.freeze({\n\tschedule: schedule,\n\tcancel: cancel,\n\tresetForTesting: resetForTesting,\n\trunEarly: processTasks\n});\n\n/*\n  tko.util\n  ===\n\n\n*/\n\n// Sub-Modules;\n\nexport { tasks, virtualElements, data as domData, memoization, jQuerySetInstance, options, arrayForEach, arrayIndexOf, arrayFirst, arrayRemoveItem, arrayGetDistinctValues, arrayMap, arrayFilter, arrayPushAll, addOrRemoveItem, makeArray, range, findMovesInArrayComparison, compareArrays, throttle, debounce, catchFunctionErrors, deferError, safeSetTimeout, ieVersion, isIe6, isIe7, extend, objectForEach, objectMap, getObjectOwnProperty, clonePlainObjectDeep, canSetPrototype, setPrototypeOf, setPrototypeOfOrExtend, hasPrototype, stringTrim, stringStartsWith, parseJson, stringifyJson, useSymbols, createSymbolOrString, toggleDomNodeCssClass, registerEventHandler, triggerEvent, domNodeIsContainedBy, domNodeIsAttachedToDocument, anyDomNodeIsAttachedToDocument, tagNameLower, isDomElement, isDocumentFragment, moveCleanedNodesToContainerElement, cloneNodes, setDomNodeChildren, replaceDomNodes, setElementName, setTextContent, emptyDomNode, fixUpContinuousNodeArray, setOptionNodeSelectionState, forceRefresh, ensureSelectElementIsRenderedCorrectly, parseHtmlFragment, setHtml, addDisposeCallback, removeDisposeCallback, cleanNode, removeNode, otherNodeCleanerFunctions, cleanjQueryData };\n//# sourceMappingURL=tko.utils.es6.js.map\n","import { arrayForEach, arrayIndexOf, arrayRemoveItem, canSetPrototype, compareArrays, createSymbolOrString, debounce, extend, findMovesInArrayComparison, hasPrototype, objectForEach, options, setPrototypeOf, setPrototypeOfOrExtend, stringifyJson, tasks, throttle } from 'tko.utils';\n\n//\n//  Defer Updates\n//  ===\n//\nfunction deferUpdates(target) {\n    if (!target._deferUpdates) {\n        target._deferUpdates = true;\n        target.limit(function (callback) {\n            var handle;\n            return function () {\n                tasks.cancel(handle);\n                handle = tasks.schedule(callback);\n                target.notifySubscribers(undefined, 'dirty');\n            };\n        });\n    }\n}\n\n//\n// Observable extenders\n// ---\n//\nvar primitiveTypes = {\n  'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1\n};\n\nfunction valuesArePrimitiveAndEqual (a, b) {\n  var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);\n  return oldValueIsPrimitive ? (a === b) : false\n}\n\nfunction applyExtenders (requestedExtenders) {\n  var target = this;\n  if (requestedExtenders) {\n    objectForEach(requestedExtenders, function (key, value) {\n      var extenderHandler = extenders[key];\n      if (typeof extenderHandler === 'function') {\n        target = extenderHandler(target, value) || target;\n      } else {\n        options.onError(new Error('Extender not found: ' + key));\n      }\n    });\n  }\n  return target\n}\n\n/*\n                --- DEFAULT EXTENDERS ---\n */\n\n// Change when notifications are published.\nfunction notify (target, notifyWhen) {\n  target.equalityComparer = notifyWhen == 'always' ?\n        null :  // null equalityComparer means to always notify\n        valuesArePrimitiveAndEqual;\n}\n\nfunction deferred (target, option) {\n  if (option !== true) {\n    throw new Error('The \\'deferred\\' extender only accepts the value \\'true\\', because it is not supported to turn deferral off once enabled.')\n  }\n  deferUpdates(target);\n}\n\nfunction rateLimit (target, options$$1) {\n  var timeout, method, limitFunction;\n\n  if (typeof options$$1 === 'number') {\n    timeout = options$$1;\n  } else {\n    timeout = options$$1.timeout;\n    method = options$$1.method;\n  }\n\n    // rateLimit supersedes deferred updates\n  target._deferUpdates = false;\n\n  limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;\n\n  target.limit(function (callback) {\n    return limitFunction(callback, timeout)\n  });\n}\n\nvar extenders = {\n  notify: notify,\n  deferred: deferred,\n  rateLimit: rateLimit\n};\n\n/* eslint no-cond-assign: 0 */\nfunction subscription (target, callback, disposeCallback) {\n  this._target = target;\n  this.callback = callback;\n  this.disposeCallback = disposeCallback;\n  this.isDisposed = false;\n}\n\nsubscription.prototype.dispose = function () {\n  this.isDisposed = true;\n  this.disposeCallback();\n};\n\nfunction subscribable () {\n  setPrototypeOfOrExtend(this, ko_subscribable_fn);\n  ko_subscribable_fn.init(this);\n}\n\nvar defaultEvent = 'change';\n\nvar ko_subscribable_fn = {\n  init (instance) {\n    instance._subscriptions = {};\n    instance._versionNumber = 1;\n  },\n\n  subscribe (callback, callbackTarget, event) {\n    var self = this;\n\n    event = event || defaultEvent;\n    var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;\n\n    var subscriptionInstance = new subscription(self, boundCallback, function () {\n      arrayRemoveItem(self._subscriptions[event], subscriptionInstance);\n      if (self.afterSubscriptionRemove) {\n        self.afterSubscriptionRemove(event);\n      }\n    });\n\n    if (self.beforeSubscriptionAdd) {\n      self.beforeSubscriptionAdd(event);\n    }\n\n    if (!self._subscriptions[event]) {\n      self._subscriptions[event] = [];\n    }\n    self._subscriptions[event].push(subscriptionInstance);\n\n    return subscriptionInstance\n  },\n\n  notifySubscribers (valueToNotify, event) {\n    event = event || defaultEvent;\n    if (event === defaultEvent) {\n      this.updateVersion();\n    }\n    if (this.hasSubscriptionsForEvent(event)) {\n      try {\n        begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)\n        for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {\n                    // In case a subscription was disposed during the arrayForEach cycle, check\n                    // for isDisposed on each subscription before invoking its callback\n          if (!subscriptionInstance.isDisposed) {\n            subscriptionInstance.callback(valueToNotify);\n          }\n        }\n      } finally {\n        end(); // End suppressing dependency detection\n      }\n    }\n  },\n\n  getVersion () {\n    return this._versionNumber\n  },\n\n  hasChanged (versionToCheck) {\n    return this.getVersion() !== versionToCheck\n  },\n\n  updateVersion () {\n    ++this._versionNumber;\n  },\n\n  hasSubscriptionsForEvent (event) {\n    return this._subscriptions[event] && this._subscriptions[event].length\n  },\n\n  getSubscriptionsCount (event) {\n    if (event) {\n      return this._subscriptions[event] && this._subscriptions[event].length || 0\n    } else {\n      var total = 0;\n      objectForEach(this._subscriptions, function (eventName, subscriptions) {\n        if (eventName !== 'dirty') {\n          total += subscriptions.length;\n        }\n      });\n      return total\n    }\n  },\n\n  isDifferent (oldValue, newValue) {\n    return !this.equalityComparer ||\n               !this.equalityComparer(oldValue, newValue)\n  },\n\n  once (cb) {\n    const subs = this.subscribe((nv) => {\n      subs.dispose();\n      cb(nv);\n    });\n  },\n\n  when (test, returnValue) {\n    const current = this.peek();\n    const givenRv = arguments.length > 1;\n    const testFn = typeof test === 'function' ? test : v => v === test;\n    if (testFn(current)) {\n      return options.Promise.resolve(givenRv ? returnValue : current)\n    }\n    return new options.Promise((resolve, reject) => {\n      const subs = this.subscribe(newValue => {\n        if (testFn(newValue)) {\n          subs.dispose();\n          resolve(givenRv ? returnValue : newValue);\n        }\n      });\n    })\n  },\n\n  yet (test, ...args) {\n    const testFn = typeof test === 'function' ? test : v => v === test;\n    const negated = v => !testFn(v);\n    return this.when(negated, ...args)\n  },\n\n  next () { return new Promise(resolve => this.once(resolve)) },\n\n  extend: applyExtenders\n};\n\n// For browsers that support proto assignment, we overwrite the prototype of each\n// observable instance. Since observables are functions, we need Function.prototype\n// to still be in the prototype chain.\nif (canSetPrototype) {\n  setPrototypeOf(ko_subscribable_fn, Function.prototype);\n}\n\nsubscribable.fn = ko_subscribable_fn;\n\nfunction isSubscribable (instance) {\n  return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function'\n}\n\n//\n// dependencyDetection\n// ---\n//\n// In KO 3.x, dependencyDetection was also known as computedContext.\n//\nconst outerFrames = [];\nlet currentFrame;\nlet lastId = 0;\n\n// Return a unique ID that can be assigned to an observable for dependency tracking.\n// Theoretically, you could eventually overflow the number storage size, resulting\n// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53\n// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would\n// take over 285 years to reach that number.\n// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html\nfunction getId () {\n  return ++lastId\n}\n\nfunction begin (options$$1) {\n  outerFrames.push(currentFrame);\n  currentFrame = options$$1;\n}\n\nfunction end () {\n  currentFrame = outerFrames.pop();\n}\n\nfunction registerDependency (subscribable$$1) {\n  if (currentFrame) {\n    if (!isSubscribable(subscribable$$1)) { throw new Error('Only subscribable things can act as dependencies') }\n    currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));\n  }\n}\n\nfunction ignore (callback, callbackTarget, callbackArgs) {\n  try {\n    begin();\n    return callback.apply(callbackTarget, callbackArgs || [])\n  } finally {\n    end();\n  }\n}\n\nfunction getDependenciesCount () {\n  if (currentFrame) { return currentFrame.computed.getDependenciesCount() }\n}\n\nfunction isInitial () {\n  if (currentFrame) { return currentFrame.isInitial }\n}\n\n\n\n\nvar dependencyDetection = Object.freeze({\n\tbegin: begin,\n\tend: end,\n\tregisterDependency: registerDependency,\n\tignore: ignore,\n\tgetDependenciesCount: getDependenciesCount,\n\tisInitial: isInitial,\n\tignoreDependencies: ignore\n});\n\n//\n//  Observable values\n//  ---\n//\nvar observableLatestValue = createSymbolOrString('_latestValue');\n\nfunction observable (initialValue) {\n  function Observable () {\n    if (arguments.length > 0) {\n            // Write\n            // Ignore writes if the value hasn't changed\n      if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {\n        Observable.valueWillMutate();\n        Observable[observableLatestValue] = arguments[0];\n        Observable.valueHasMutated();\n      }\n      return this // Permits chained assignments\n    } else {\n            // Read\n      registerDependency(Observable); // The caller only needs to be notified of changes if they did a \"read\" operation\n      return Observable[observableLatestValue]\n    }\n  }\n\n  Observable[observableLatestValue] = initialValue;\n\n    // Inherit from 'subscribable'\n  if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n    extend(Observable, subscribable.fn);\n  }\n  subscribable.fn.init(Observable);\n\n    // Inherit from 'observable'\n  setPrototypeOfOrExtend(Observable, observable.fn);\n\n  if (options.deferUpdates) {\n    deferUpdates(Observable);\n  }\n\n  return Observable\n}\n\n// Define prototype for observables\nobservable.fn = {\n  equalityComparer: valuesArePrimitiveAndEqual,\n  peek () { return this[observableLatestValue] },\n  valueHasMutated () { this.notifySubscribers(this[observableLatestValue]); },\n  valueWillMutate () {\n    this.notifySubscribers(this[observableLatestValue], 'beforeChange');\n  },\n  then (res, rej) { try { res(this()); } catch (e) { rej(e); } },\n};\n\n// Moved out of \"limit\" to avoid the extra closure\nfunction limitNotifySubscribers (value, event) {\n  if (!event || event === defaultEvent) {\n    this._limitChange(value);\n  } else if (event === 'beforeChange') {\n    this._limitBeforeChange(value);\n  } else {\n    this._origNotifySubscribers(value, event);\n  }\n}\n\n// Add `limit` function to the subscribable prototype\nsubscribable.fn.limit = function limit (limitFunction) {\n  var self = this;\n  var selfIsObservable = isObservable(self);\n  var beforeChange = 'beforeChange';\n  var ignoreBeforeChange, previousValue, pendingValue;\n\n  if (!self._origNotifySubscribers) {\n    self._origNotifySubscribers = self.notifySubscribers;\n    self.notifySubscribers = limitNotifySubscribers;\n  }\n\n  var finish = limitFunction(function () {\n    self._notificationIsPending = false;\n\n        // If an observable provided a reference to itself, access it to get the latest value.\n        // This allows computed observables to delay calculating their value until needed.\n    if (selfIsObservable && pendingValue === self) {\n      pendingValue = self();\n    }\n    ignoreBeforeChange = false;\n    if (self.isDifferent(previousValue, pendingValue)) {\n      self._origNotifySubscribers(previousValue = pendingValue);\n    }\n  });\n\n  self._limitChange = function (value) {\n    self._notificationIsPending = ignoreBeforeChange = true;\n    pendingValue = value;\n    finish();\n  };\n  self._limitBeforeChange = function (value) {\n    if (!ignoreBeforeChange) {\n      previousValue = value;\n      self._origNotifySubscribers(value, beforeChange);\n    }\n  };\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the observable constructor\nif (canSetPrototype) {\n  setPrototypeOf(observable.fn, subscribable.fn);\n}\n\nvar protoProperty = observable.protoProperty = options.protoProperty;\nobservable.fn[protoProperty] = observable;\n\nfunction isObservable (instance) {\n  return hasPrototype(instance, observable)\n}\n\nfunction unwrap (value) {\n  return isObservable(value) ? value() : value\n}\n\nfunction peek (value) {\n  return isObservable(value) ? value.peek() : value\n}\n\nfunction isWriteableObservable (instance) {\n    // Observable\n  if ((typeof instance === 'function') && instance[protoProperty] === observable) {\n    return true\n  }\n    // Writeable dependent observable\n  if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {\n    return true\n  }\n    // Anything else\n  return false\n}\n\n//\n// Observable Array - Change Tracking Extender\n// ---\n//\n/* eslint no-fallthrough: 0*/\n\nvar arrayChangeEventName = 'arrayChange';\n\n\nfunction trackArrayChanges(target, options$$1) {\n    // Use the provided options--each call to trackArrayChanges overwrites the previously set options\n    target.compareArrayOptions = {};\n    if (options$$1 && typeof options$$1 == \"object\") {\n        extend(target.compareArrayOptions, options$$1);\n    }\n    target.compareArrayOptions.sparse = true;\n\n    // Only modify the target observable once\n    if (target.cacheDiffForKnownOperation) {\n        return;\n    }\n    var trackingChanges = false,\n        cachedDiff = null,\n        arrayChangeSubscription,\n        pendingNotifications = 0,\n        underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd,\n        underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;\n\n    // Watch \"subscribe\" calls, and for array change events, ensure change tracking is enabled\n    target.beforeSubscriptionAdd = function (event) {\n        if (underlyingBeforeSubscriptionAddFunction)\n            underlyingBeforeSubscriptionAddFunction.call(target, event);\n        if (event === arrayChangeEventName) {\n            trackChanges();\n        }\n    };\n\n    // Watch \"dispose\" calls, and for array change events, ensure change tracking is disabled when all are disposed\n    target.afterSubscriptionRemove = function (event) {\n        if (underlyingAfterSubscriptionRemoveFunction)\n            underlyingAfterSubscriptionRemoveFunction.call(target, event);\n        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n            if (arrayChangeSubscription) {\n                arrayChangeSubscription.dispose();\n            }\n            arrayChangeSubscription = null;\n            trackingChanges = false;\n        }\n    };\n\n    function trackChanges() {\n        // Calling 'trackChanges' multiple times is the same as calling it once\n        if (trackingChanges) {\n            return;\n        }\n\n        trackingChanges = true;\n\n        // Intercept \"notifySubscribers\" to track how many times it was called.\n        var underlyingNotifySubscribersFunction = target['notifySubscribers'];\n        target['notifySubscribers'] = function(valueToNotify, event) {\n            if (!event || event === defaultEvent) {\n                ++pendingNotifications;\n            }\n            return underlyingNotifySubscribersFunction.apply(this, arguments);\n        };\n\n        // Each time the array changes value, capture a clone so that on the next\n        // change it's possible to produce a diff\n        var previousContents = [].concat(target.peek() || []);\n        cachedDiff = null;\n        arrayChangeSubscription = target.subscribe(function(currentContents) {\n            // Make a copy of the current contents and ensure it's an array\n            currentContents = [].concat(currentContents || []);\n\n            // Compute the diff and issue notifications, but only if someone is listening\n            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n                var changes = getChanges(previousContents, currentContents);\n            }\n\n            // Eliminate references to the old, removed items, so they can be GCed\n            previousContents = currentContents;\n            cachedDiff = null;\n            pendingNotifications = 0;\n\n            if (changes && changes.length) {\n                target['notifySubscribers'](changes, arrayChangeEventName);\n            }\n        });\n    }\n\n    function getChanges(previousContents, currentContents) {\n        // We try to re-use cached diffs.\n        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates\n        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,\n        // notifications are issued immediately so we wouldn't be queueing up more than one.\n        if (!cachedDiff || pendingNotifications > 1) {\n            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);\n        }\n\n        return cachedDiff;\n    }\n\n    target.cacheDiffForKnownOperation = function(rawArray, operationName, args) {\n        var index, argsIndex;\n        // Only run if we're currently tracking changes for this observable array\n        // and there aren't any pending deferred notifications.\n        if (!trackingChanges || pendingNotifications) {\n            return;\n        }\n        var diff = [],\n            arrayLength = rawArray.length,\n            argsLength = args.length,\n            offset = 0;\n\n        function pushDiff(status, value, index) {\n            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };\n        }\n        switch (operationName) {\n        case 'push':\n            offset = arrayLength;\n        case 'unshift':\n            for (index = 0; index < argsLength; index++) {\n                pushDiff('added', args[index], offset + index);\n            }\n            break;\n\n        case 'pop':\n            offset = arrayLength - 1;\n        case 'shift':\n            if (arrayLength) {\n                pushDiff('deleted', rawArray[offset], offset);\n            }\n            break;\n\n        case 'splice':\n            // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].\n            // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice\n            var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength),\n                endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength),\n                endAddIndex = startIndex + argsLength - 2,\n                endIndex = Math.max(endDeleteIndex, endAddIndex),\n                additions = [], deletions = [];\n            for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {\n                if (index < endDeleteIndex)\n                    deletions.push(pushDiff('deleted', rawArray[index], index));\n                if (index < endAddIndex)\n                    additions.push(pushDiff('added', args[argsIndex], index));\n            }\n            findMovesInArrayComparison(deletions, additions);\n            break;\n\n        default:\n            return;\n        }\n        cachedDiff = diff;\n    };\n}\n\n\n// Expose compareArrays for testing.\ntrackArrayChanges.compareArrays = compareArrays;\n\n\n// Add the trackArrayChanges extender so we can use\n// obs.extend({ trackArrayChanges: true })\nextenders.trackArrayChanges = trackArrayChanges;\n\n//\n// Observable Arrays\n// ===\n//\nfunction observableArray (initialValues) {\n  initialValues = initialValues || [];\n\n  if (typeof initialValues !== 'object' || !('length' in initialValues)) { throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.') }\n\n  var result = observable(initialValues);\n  setPrototypeOfOrExtend(result, observableArray.fn);\n  trackArrayChanges(result);\n        // ^== result.extend({ trackArrayChanges: true })\n  return result\n}\n\nobservableArray.fn = {\n  remove: function (valueOrPredicate) {\n    var underlyingArray = this.peek();\n    var removedValues = [];\n    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };\n    for (var i = 0; i < underlyingArray.length; i++) {\n      var value = underlyingArray[i];\n      if (predicate(value)) {\n        if (removedValues.length === 0) {\n          this.valueWillMutate();\n        }\n        removedValues.push(value);\n        underlyingArray.splice(i, 1);\n        i--;\n      }\n    }\n    if (removedValues.length) {\n      this.valueHasMutated();\n    }\n    return removedValues\n  },\n\n  removeAll: function (arrayOfValues) {\n        // If you passed zero args, we remove everything\n    if (arrayOfValues === undefined) {\n      var underlyingArray = this.peek();\n      var allValues = underlyingArray.slice(0);\n      this.valueWillMutate();\n      underlyingArray.splice(0, underlyingArray.length);\n      this.valueHasMutated();\n      return allValues\n    }\n        // If you passed an arg, we interpret it as an array of entries to remove\n    if (!arrayOfValues) {\n      return []\n    }\n    return this['remove'](function (value) {\n      return arrayIndexOf(arrayOfValues, value) >= 0\n    })\n  },\n\n  destroy: function (valueOrPredicate) {\n    var underlyingArray = this.peek();\n    var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate };\n    this.valueWillMutate();\n    for (var i = underlyingArray.length - 1; i >= 0; i--) {\n      var value = underlyingArray[i];\n      if (predicate(value)) {\n        underlyingArray[i]['_destroy'] = true;\n      }\n    }\n    this.valueHasMutated();\n  },\n\n  destroyAll: function (arrayOfValues) {\n        // If you passed zero args, we destroy everything\n    if (arrayOfValues === undefined) { return this.destroy(function () { return true }) }\n\n        // If you passed an arg, we interpret it as an array of entries to destroy\n    if (!arrayOfValues) {\n      return []\n    }\n    return this.destroy(function (value) {\n      return arrayIndexOf(arrayOfValues, value) >= 0\n    })\n  },\n\n  indexOf: function (item) {\n    var underlyingArray = this();\n    return arrayIndexOf(underlyingArray, item)\n  },\n\n  replace: function (oldItem, newItem) {\n    var index = this.indexOf(oldItem);\n    if (index >= 0) {\n      this.valueWillMutate();\n      this.peek()[index] = newItem;\n      this.valueHasMutated();\n    }\n  }\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.observableArray constructor\nif (canSetPrototype) {\n  setPrototypeOf(observableArray.fn, observable.fn);\n}\n\n// Populate ko.observableArray.fn with read/write functions from native arrays\n// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array\n// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale\narrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {\n  observableArray.fn[methodName] = function () {\n        // Use \"peek\" to avoid creating a subscription in any computed that we're executing in the context of\n        // (for consistency with mutating regular observables)\n    var underlyingArray = this.peek();\n    this.valueWillMutate();\n    this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);\n    var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);\n    this.valueHasMutated();\n        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.\n    return methodCallResult === underlyingArray ? this : methodCallResult\n  };\n});\n\n// Populate ko.observableArray.fn with read-only functions from native arrays\narrayForEach(['slice'], function (methodName) {\n  observableArray.fn[methodName] = function () {\n    var underlyingArray = this();\n    return underlyingArray[methodName].apply(underlyingArray, arguments)\n  };\n});\n\n//\n// Helpers\n// ---\n// toJS & toJSON\n//\nvar maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)\n\nfunction toJS(rootObject) {\n    if (arguments.length == 0)\n        throw new Error(\"When calling ko.toJS, pass the object you want to convert.\");\n\n    // We just unwrap everything at every level in the object graph\n    return mapJsObjectGraph(rootObject, function(valueToMap) {\n        // Loop because an observable's value might in turn be another observable wrapper\n        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)\n            valueToMap = valueToMap();\n        return valueToMap;\n    });\n}\n\nfunction toJSON(rootObject, replacer, space) {     // replacer and space are optional\n    var plainJavaScriptObject = toJS(rootObject);\n    return stringifyJson(plainJavaScriptObject, replacer, space);\n}\n\nfunction mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {\n    visitedObjects = visitedObjects || new objectLookup();\n\n    rootObject = mapInputCallback(rootObject);\n    var canHaveProperties = (typeof rootObject == \"object\") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));\n    if (!canHaveProperties)\n        return rootObject;\n\n    var outputProperties = rootObject instanceof Array ? [] : {};\n    visitedObjects.save(rootObject, outputProperties);\n\n    visitPropertiesOrArrayEntries(rootObject, function(indexer) {\n        var propertyValue = mapInputCallback(rootObject[indexer]);\n\n        switch (typeof propertyValue) {\n        case \"boolean\":\n        case \"number\":\n        case \"string\":\n        case \"function\":\n            outputProperties[indexer] = propertyValue;\n            break;\n        case \"object\":\n        case \"undefined\":\n            var previouslyMappedValue = visitedObjects.get(propertyValue);\n            outputProperties[indexer] = (previouslyMappedValue !== undefined)\n                ? previouslyMappedValue\n                : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);\n            break;\n        }\n    });\n\n    return outputProperties;\n}\n\nfunction visitPropertiesOrArrayEntries(rootObject, visitorCallback) {\n    if (rootObject instanceof Array) {\n        for (var i = 0; i < rootObject.length; i++)\n            visitorCallback(i);\n\n        // For arrays, also respect toJSON property for custom mappings (fixes #278)\n        if (typeof rootObject['toJSON'] == 'function')\n            visitorCallback('toJSON');\n    } else {\n        for (var propertyName in rootObject) {\n            visitorCallback(propertyName);\n        }\n    }\n}\n\nfunction objectLookup() {\n    this.keys = [];\n    this.values = [];\n}\n\nobjectLookup.prototype = {\n    constructor: objectLookup,\n    save: function(key, value) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        if (existingIndex >= 0)\n            this.values[existingIndex] = value;\n        else {\n            this.keys.push(key);\n            this.values.push(value);\n        }\n    },\n    get: function(key) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;\n    }\n};\n\n//\n// Observables.\n// ---\n//\n// The following are added to the root `[t]ko` object.\n//\n\nexport { dependencyDetection, observable, isObservable, unwrap, peek, isWriteableObservable, isWriteableObservable as isWritableObservable, isSubscribable, subscribable, observableArray, trackArrayChanges, arrayChangeEventName, toJS, toJSON, deferUpdates, valuesArePrimitiveAndEqual, applyExtenders, extenders };\n//# sourceMappingURL=tko.observable.es6.js.map\n","import { addDisposeCallback, arrayForEach, canSetPrototype, createSymbolOrString, domNodeIsAttachedToDocument, extend, hasPrototype, objectForEach, options, removeDisposeCallback, safeSetTimeout, setPrototypeOf, setPrototypeOfOrExtend } from 'tko.utils';\nimport { dependencyDetection, extenders, observable, subscribable, valuesArePrimitiveAndEqual } from 'tko.observable';\n\n//\n// Computed Observable Values\n//\n// (before tko, `computed` was also known as `dependentObservable`)\n//\nvar computedState = createSymbolOrString('_state');\n\nfunction computed (evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {\n  if (typeof evaluatorFunctionOrOptions === 'object') {\n        // Single-parameter syntax - everything is on this \"options\" param\n    options$$1 = evaluatorFunctionOrOptions;\n  } else {\n        // Multi-parameter syntax - construct the options according to the params passed\n    options$$1 = options$$1 || {};\n    if (evaluatorFunctionOrOptions) {\n      options$$1.read = evaluatorFunctionOrOptions;\n    }\n  }\n  if (typeof options$$1.read !== 'function') {\n    throw Error('Pass a function that returns the value of the computed')\n  }\n\n  var writeFunction = options$$1.write;\n  var state = {\n    latestValue: undefined,\n    isStale: true,\n    isBeingEvaluated: false,\n    suppressDisposalUntilDisposeWhenReturnsFalse: false,\n    isDisposed: false,\n    pure: false,\n    isSleeping: false,\n    readFunction: options$$1.read,\n    evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,\n    disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,\n    disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,\n    domNodeDisposalCallback: null,\n    dependencyTracking: {},\n    dependenciesCount: 0,\n    evaluationTimeoutInstance: null\n  };\n\n  function computedObservable () {\n    if (arguments.length > 0) {\n      if (typeof writeFunction === 'function') {\n                // Writing a value\n        writeFunction.apply(state.evaluatorFunctionTarget, arguments);\n      } else {\n        throw new Error(\"Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.\")\n      }\n      return this // Permits chained assignments\n    } else {\n            // Reading the value\n      dependencyDetection.registerDependency(computedObservable);\n      if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {\n        computedObservable.evaluateImmediate();\n      }\n      return state.latestValue\n    }\n  }\n\n  computedObservable[computedState] = state;\n  computedObservable.hasWriteFunction = typeof writeFunction === 'function';\n\n    // Inherit from 'subscribable'\n  if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n    extend(computedObservable, subscribable.fn);\n  }\n  subscribable.fn.init(computedObservable);\n\n    // Inherit from 'computed'\n  setPrototypeOfOrExtend(computedObservable, computed.fn);\n\n  if (options$$1.pure) {\n    state.pure = true;\n    state.isSleeping = true;     // Starts off sleeping; will awake on the first subscription\n    extend(computedObservable, pureComputedOverrides);\n  } else if (options$$1.deferEvaluation) {\n    extend(computedObservable, deferEvaluationOverrides);\n  }\n\n  if (options.deferUpdates) {\n    extenders.deferred(computedObservable, true);\n  }\n\n  if (options.debug) {\n        // #1731 - Aid debugging by exposing the computed's options\n    computedObservable._options = options$$1;\n  }\n\n  if (state.disposeWhenNodeIsRemoved) {\n        // Since this computed is associated with a DOM node, and we don't want to dispose the computed\n        // until the DOM node is *removed* from the document (as opposed to never having been in the document),\n        // we'll prevent disposal until \"disposeWhen\" first returns false.\n    state.suppressDisposalUntilDisposeWhenReturnsFalse = true;\n\n        // disposeWhenNodeIsRemoved: true can be used to opt into the \"only dispose after first false result\"\n        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try\n        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't\n        // be documented or used by application code, as it's likely to change in a future version of KO.\n    if (!state.disposeWhenNodeIsRemoved.nodeType) {\n      state.disposeWhenNodeIsRemoved = null;\n    }\n  }\n\n    // Evaluate, unless sleeping or deferEvaluation is true\n  if (!state.isSleeping && !options$$1.deferEvaluation) {\n    computedObservable.evaluateImmediate();\n  }\n\n    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is\n    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).\n  if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {\n    addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {\n      computedObservable.dispose();\n    });\n  }\n\n  return computedObservable\n}\n\n// Utility function that disposes a given dependencyTracking entry\nfunction computedDisposeDependencyCallback (id, entryToDispose) {\n  if (entryToDispose !== null && entryToDispose.dispose) {\n    entryToDispose.dispose();\n  }\n}\n\n// This function gets called each time a dependency is detected while evaluating a computed.\n// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.\nfunction computedBeginDependencyDetectionCallback (subscribable$$1, id) {\n  var computedObservable = this.computedObservable,\n    state = computedObservable[computedState];\n  if (!state.isDisposed) {\n    if (this.disposalCount && this.disposalCandidates[id]) {\n            // Don't want to dispose this subscription, as it's still being used\n      computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);\n      this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway\n      --this.disposalCount;\n    } else if (!state.dependencyTracking[id]) {\n            // Brand new subscription - add it\n      computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));\n    }\n  }\n}\n\ncomputed.fn = {\n  equalityComparer: valuesArePrimitiveAndEqual,\n  getDependenciesCount: function () {\n    return this[computedState].dependenciesCount\n  },\n  addDependencyTracking: function (id, target, trackingObj) {\n    if (this[computedState].pure && target === this) {\n      throw Error(\"A 'pure' computed must not be called recursively\")\n    }\n\n    this[computedState].dependencyTracking[id] = trackingObj;\n    trackingObj._order = this[computedState].dependenciesCount++;\n    trackingObj._version = target.getVersion();\n  },\n  haveDependenciesChanged: function () {\n    var id, dependency, dependencyTracking = this[computedState].dependencyTracking;\n    for (id in dependencyTracking) {\n      if (dependencyTracking.hasOwnProperty(id)) {\n        dependency = dependencyTracking[id];\n        if (dependency._target.hasChanged(dependency._version)) {\n          return true\n        }\n      }\n    }\n  },\n  markDirty: function () {\n        // Process \"dirty\" events if we can handle delayed notifications\n    if (this._evalDelayed && !this[computedState].isBeingEvaluated) {\n      this._evalDelayed();\n    }\n  },\n  isActive: function () {\n    return this[computedState].isStale || this[computedState].dependenciesCount > 0\n  },\n  respondToChange: function () {\n        // Ignore \"change\" events if we've already scheduled a delayed notification\n    if (!this._notificationIsPending) {\n      this.evaluatePossiblyAsync();\n    }\n  },\n  subscribeToDependency: function (target) {\n    if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {\n      var dirtySub = target.subscribe(this.markDirty, this, 'dirty'),\n        changeSub = target.subscribe(this.respondToChange, this);\n      return {\n        _target: target,\n        dispose: function () {\n          dirtySub.dispose();\n          changeSub.dispose();\n        }\n      }\n    } else {\n      return target.subscribe(this.evaluatePossiblyAsync, this)\n    }\n  },\n  evaluatePossiblyAsync: function () {\n    var computedObservable = this,\n      throttleEvaluationTimeout = computedObservable.throttleEvaluation;\n    if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {\n      clearTimeout(this[computedState].evaluationTimeoutInstance);\n      this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {\n        computedObservable.evaluateImmediate(true /* notifyChange */);\n      }, throttleEvaluationTimeout);\n    } else if (computedObservable._evalDelayed) {\n      computedObservable._evalDelayed();\n    } else {\n      computedObservable.evaluateImmediate(true /* notifyChange */);\n    }\n  },\n  evaluateImmediate: function (notifyChange) {\n    var computedObservable = this,\n      state = computedObservable[computedState],\n      disposeWhen = state.disposeWhen;\n\n    if (state.isBeingEvaluated) {\n            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.\n            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost\n            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing\n            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387\n      return\n    }\n\n        // Do not evaluate (and possibly capture new dependencies) if disposed\n    if (state.isDisposed) {\n      return\n    }\n\n    if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {\n            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse\n      if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {\n        computedObservable.dispose();\n        return\n      }\n    } else {\n            // It just did return false, so we can stop suppressing now\n      state.suppressDisposalUntilDisposeWhenReturnsFalse = false;\n    }\n\n    state.isBeingEvaluated = true;\n    try {\n      this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);\n    } finally {\n      state.isBeingEvaluated = false;\n    }\n\n    if (!state.dependenciesCount) {\n      computedObservable.dispose();\n    }\n  },\n  evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {\n        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.\n        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,\n        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).\n\n    var computedObservable = this,\n      state = computedObservable[computedState];\n\n        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).\n        // Then, during evaluation, we cross off any that are in fact still being used.\n    var isInitial = state.pure ? undefined : !state.dependenciesCount,   // If we're evaluating when there are no previous dependencies, it must be the first time\n      dependencyDetectionContext = {\n        computedObservable: computedObservable,\n        disposalCandidates: state.dependencyTracking,\n        disposalCount: state.dependenciesCount\n      };\n\n    dependencyDetection.begin({\n      callbackTarget: dependencyDetectionContext,\n      callback: computedBeginDependencyDetectionCallback,\n      computed: computedObservable,\n      isInitial: isInitial\n    });\n\n    state.dependencyTracking = {};\n    state.dependenciesCount = 0;\n\n    var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);\n\n    if (computedObservable.isDifferent(state.latestValue, newValue)) {\n      if (!state.isSleeping) {\n        computedObservable.notifySubscribers(state.latestValue, 'beforeChange');\n      }\n\n      state.latestValue = newValue;\n\n      if (state.isSleeping) {\n        computedObservable.updateVersion();\n      } else if (notifyChange) {\n        computedObservable.notifySubscribers(state.latestValue);\n      }\n    }\n\n    if (isInitial) {\n      computedObservable.notifySubscribers(state.latestValue, 'awake');\n    }\n  },\n  evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {\n        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.\n        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection\n        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU\n        // overhead of computed evaluation (on V8 at least).\n\n    try {\n      var readFunction = state.readFunction;\n      return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction()\n    } finally {\n      dependencyDetection.end();\n\n            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it\n      if (dependencyDetectionContext.disposalCount && !state.isSleeping) {\n        objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);\n      }\n\n      state.isStale = false;\n    }\n  },\n  peek: function () {\n        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when \"deferEvaluation\" is set.\n    var state = this[computedState];\n    if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {\n      this.evaluateImmediate();\n    }\n    return state.latestValue\n  },\n  limit: function (limitFunction) {\n        // Override the limit function with one that delays evaluation as well\n    subscribable.fn.limit.call(this, limitFunction);\n    this._evalDelayed = function () {\n      this._limitBeforeChange(this[computedState].latestValue);\n\n      this[computedState].isStale = true; // Mark as dirty\n\n            // Pass the observable to the \"limit\" code, which will access it when\n            // it's time to do the notification.\n      this._limitChange(this);\n    };\n  },\n  dispose: function () {\n    var state = this[computedState];\n    if (!state.isSleeping && state.dependencyTracking) {\n      objectForEach(state.dependencyTracking, function (id, dependency) {\n        if (dependency.dispose) {\n          dependency.dispose();\n        }\n      });\n    }\n    if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {\n      removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);\n    }\n    state.dependencyTracking = null;\n    state.dependenciesCount = 0;\n    state.isDisposed = true;\n    state.isStale = false;\n    state.isSleeping = false;\n    state.disposeWhenNodeIsRemoved = null;\n    state.readFunction = null;\n    if (options.debug) {\n      this._options = null;\n    }\n  }\n};\n\nvar pureComputedOverrides = {\n  beforeSubscriptionAdd: function (event) {\n        // If asleep, wake up the computed by subscribing to any dependencies.\n    var computedObservable = this,\n      state = computedObservable[computedState];\n    if (!state.isDisposed && state.isSleeping && event == 'change') {\n      state.isSleeping = false;\n      if (state.isStale || computedObservable.haveDependenciesChanged()) {\n        state.dependencyTracking = null;\n        state.dependenciesCount = 0;\n        state.isStale = true;\n        computedObservable.evaluateImmediate();\n      } else {\n                // First put the dependencies in order\n        var dependeciesOrder = [];\n        objectForEach(state.dependencyTracking, function (id, dependency) {\n          dependeciesOrder[dependency._order] = id;\n        });\n                // Next, subscribe to each one\n        arrayForEach(dependeciesOrder, function (id, order) {\n          var dependency = state.dependencyTracking[id],\n            subscription = computedObservable.subscribeToDependency(dependency._target);\n          subscription._order = order;\n          subscription._version = dependency._version;\n          state.dependencyTracking[id] = subscription;\n        });\n      }\n      if (!state.isDisposed) {     // test since evaluating could trigger disposal\n        computedObservable.notifySubscribers(state.latestValue, 'awake');\n      }\n    }\n  },\n  afterSubscriptionRemove: function (event) {\n    var state = this[computedState];\n    if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {\n      objectForEach(state.dependencyTracking, function (id, dependency) {\n        if (dependency.dispose) {\n          state.dependencyTracking[id] = {\n            _target: dependency._target,\n            _order: dependency._order,\n            _version: dependency._version\n          };\n          dependency.dispose();\n        }\n      });\n      state.isSleeping = true;\n      this.notifySubscribers(undefined, 'asleep');\n    }\n  },\n  getVersion: function () {\n        // Because a pure computed is not automatically updated while it is sleeping, we can't\n        // simply return the version number. Instead, we check if any of the dependencies have\n        // changed and conditionally re-evaluate the computed observable.\n    var state = this[computedState];\n    if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {\n      this.evaluateImmediate();\n    }\n    return subscribable.fn.getVersion.call(this)\n  }\n};\n\nvar deferEvaluationOverrides = {\n  beforeSubscriptionAdd: function (event) {\n        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.\n    if (event == 'change' || event == 'beforeChange') {\n      this.peek();\n    }\n  }\n};\n\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.computed constructor\nif (canSetPrototype) {\n  setPrototypeOf(computed.fn, subscribable.fn);\n}\n\n// Set the proto chain values for ko.hasPrototype\nvar protoProp = observable.protoProperty; // == \"__ko_proto__\"\ncomputed[protoProp] = observable;\ncomputed.fn[protoProp] = computed;\n\nfunction isComputed (instance) {\n  return hasPrototype(instance, computed)\n}\n\nfunction isPureComputed (instance) {\n  return hasPrototype(instance, computed)\n        && instance[computedState] && instance[computedState].pure\n}\n\nfunction pureComputed (evaluatorFunctionOrOptions, evaluatorFunctionTarget) {\n  if (typeof evaluatorFunctionOrOptions === 'function') {\n    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, {'pure': true})\n  } else {\n    evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions);   // make a copy of the parameter object\n    evaluatorFunctionOrOptions.pure = true;\n    return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget)\n  }\n}\n\nfunction throttleExtender(target, timeout) {\n    // Throttling means two things:\n\n    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies\n    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate\n    target.throttleEvaluation = timeout;\n\n    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*\n    //     so the target cannot change value synchronously or faster than a certain rate\n    var writeTimeoutInstance = null;\n    return computed({\n        read: target,\n        write: function(value) {\n            clearTimeout(writeTimeoutInstance);\n            writeTimeoutInstance = setTimeout(function() {\n                target(value);\n            }, timeout);\n        }\n    });\n}\n\n\nextenders.throttle = throttleExtender;\n\n//\n// tko.computed - Exports\n//\n// knockout -> tko changes:\n//      Deprecates `dependentObservable` (use `computed`)\n//\n\nexport { computed, isComputed, isPureComputed, pureComputed, throttleExtender };\n//# sourceMappingURL=tko.computed.es6.js.map\n","import { clonePlainObjectDeep, extend, objectForEach, options, stringTrim } from 'tko.utils';\nimport { isObservable, isWriteableObservable, unwrap } from 'tko.observable';\n\nfunction LAMBDA () {}\n\n/**\n * @ operator - recursively call the identifier if it's a function\n * @param  {operand} a ignored\n * @param  {operand} b The variable to be called (if a function) and unwrapped\n * @return {value}   The result.\n */\nfunction unwrapOrCall (a, b) {\n  while (typeof b === 'function') { b = b(); }\n  return b\n}\n\nconst operators = {\n  // unary\n  '@': unwrapOrCall,\n  '#': (a, b) => () => unwrap(b), // Convert to read-only.\n  '=>': LAMBDA,\n  '!': function not (a, b) { return !b },\n  '!!': function notnot (a, b) { return !!b },\n  '++': function preinc (a, b) { return ++b },\n  '--': function preinc (a, b) { return --b },\n  // mul/div\n  '*': function mul (a, b) { return a * b },\n  '/': function div (a, b) { return a / b },\n  '%': function mod (a, b) { return a % b },\n  // sub/add\n  '+': function add (a, b) { return a + b },\n  '-': function sub (a, b) { return (a || 0) - (b || 0) },\n  '&-': function neg (a, b) { return -1 * b },\n  // relational\n  '<': function lt (a, b) { return a < b },\n  '<=': function le (a, b) { return a <= b },\n  '>': function gt (a, b) { return a > b },\n  '>=': function ge (a, b) { return a >= b },\n  //    TODO: 'in': function (a, b) { return a in b; },\n  //    TODO: 'instanceof': function (a, b) { return a instanceof b; },\n  // equality\n  '==': function equal (a, b) { return a === b },\n  '!=': function ne (a, b) { return a !== b },\n  '===': function sequal (a, b) { return a === b },\n  '!==': function sne (a, b) { return a !== b },\n  // bitwise\n  '&': function bitAnd (a, b) { return a & b },\n  '^': function xor (a, b) { return a ^ b },\n  '|': function bitOr (a, b) { return a | b },\n  // logic\n  '&&': function logicAnd (a, b) { return a && b },\n  '||': function logicOr (a, b) { return a || b },\n  // Access\n  '.': function member (a, b) { return a[b] },\n  '[': function member (a, b) { return a[b] },\n  // conditional/ternary\n  // '?': ternary See Node.js\n  // Function-Call\n  'call': function callOp (a, b) { return a.apply(null, b) }\n};\n\n/* Order of precedence from:\nhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table\n*/\n\n  // Our operator - unwrap/call\noperators['@'].precedence = 21;\noperators['#'].precedence = 21;\n\n  // lambda\noperators['=>'].precedence = 20;\n\n  // Member\noperators['.'].precedence = 19;\noperators['['].precedence = 19;\n\n  // Logical not\noperators['!'].precedence = 16;\noperators['!!'].precedence = 16; // explicit double-negative\n\n  // Prefix inc/dec\noperators['++'].precedence = 16;\noperators['--'].precedence = 16;\noperators['&-'].precedence = 16;\n\n  // mul/div/remainder\noperators['%'].precedence = 14;\noperators['*'].precedence = 14;\noperators['/'].precedence = 14;\n\n  // add/sub\noperators['+'].precedence = 13;\noperators['-'].precedence = 13;\n\n  // bitwise\noperators['|'].precedence = 12;\noperators['^'].precedence = 11;\noperators['&'].precedence = 10;\n\n  // comparison\noperators['<'].precedence = 11;\noperators['<='].precedence = 11;\noperators['>'].precedence = 11;\noperators['>='].precedence = 11;\n\n  // operators['in'].precedence = 8;\n  // operators['instanceof'].precedence = 8;\n  // equality\noperators['=='].precedence = 10;\noperators['!='].precedence = 10;\noperators['==='].precedence = 10;\noperators['!=='].precedence = 10;\n\n  // logic\noperators['&&'].precedence = 6;\noperators['||'].precedence = 5;\n\noperators['&&'].earlyOut = (a) => !a;\noperators['||'].earlyOut = (a) => a;\n\n  // Call a function\noperators['call'].precedence = 1;\n\nconst IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');\n\nclass Node {\n  constructor (lhs, op, rhs) {\n    this.lhs = lhs;\n    this.op = op;\n    this.rhs = rhs;\n  }\n\n  static get operators () { return operators }\n\n  get_leaf_value (leaf, context, globals, node) {\n    if (typeof leaf === 'function') {\n      // Expressions on observables are nonsensical, so we unwrap any\n      // function values (e.g. identifiers).\n      return unwrap(leaf())\n    }\n\n    // primitives\n    if (typeof leaf !== 'object' || leaf === null) { return leaf }\n\n    // Identifiers and Expressions\n    if (leaf[Node.isExpressionOrIdentifierSymbol]) {\n      // lhs is passed in as the parent of the leaf. It will be defined in\n      // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.\n      return unwrap(leaf.get_value(undefined, context, globals, node))\n    }\n\n    // Plain object/class.\n    return leaf\n  }\n\n  /**\n   * Return a function that calculates and returns an expression's value\n   * when called.\n   * @param  {array} ops  The operations to perform\n   * @return {function}   The function that calculates the expression.\n   *\n   * Note that for a lambda, we do not evaluate the RHS expression until\n   * the lambda is called.\n   */\n  get_value (notused, context, globals, node) {\n    var node = this;\n\n    if (node.op === LAMBDA) {\n      return () => node.get_leaf_value(node.rhs, context, globals, node)\n    }\n\n    const lhv = node.get_leaf_value(node.lhs, context, globals, node);\n    const earlyOut = node.op.earlyOut;\n\n    if (earlyOut && earlyOut(lhv)) { return lhv }\n    const rhv = node.get_leaf_value(node.rhs, context, globals, node);\n\n    return node.op(lhv, rhv, context, globals)\n  }\n\n  //\n  // Class variables.\n  //\n  static get isExpressionOrIdentifierSymbol () { return IS_EXPR_OR_IDENT }\n  get [IS_EXPR_OR_IDENT] () { return true }\n\n  static value_of (item, context, globals, node) {\n    if (item && item[Node.isExpressionOrIdentifierSymbol]) {\n      return item.get_value(item, context, globals, node)\n    }\n    return item\n  }\n\n  /**\n  *  Convert an array of nodes to an executable tree.\n  *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding\n  *                      to the left hand side, right hand side, and\n  *                      operation function.\n  */\n  static create_root (nodes) {\n    var root, leaf, op, value;\n\n    // Prime the leaf = root node.\n    leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());\n\n    while (true) {\n      op = nodes.shift();\n      value = nodes.shift();\n      if (!op) {\n        break\n      }\n      if (op.precedence < root.op.precedence) {\n        // rebase\n        root = new Node(root, op, value);\n        leaf = root;\n      } else {\n        leaf.rhs = new Node(leaf.rhs, op, value);\n        leaf = leaf.rhs;\n      }\n    }\n    // console.log('tree', root)\n    return root\n  }\n}\n\n/**\n * Because of cyclical dependencies on operators <-> Node <-> value_of,\n * we need to patch this in here.\n */\noperators['?'] = function ternary (a, b, context, globals, node) {\n  return Node.value_of(a ? b.yes : b.no, context, globals, node)\n};\noperators['?'].precedence = 4;\n\nclass Expression {\n  constructor (nodes) {\n    this.nodes = nodes;\n    this.root = Node.create_root(nodes);\n  }\n\n  /**\n   * Return the value of `this` Expression instance.\n   */\n  get_value (parent, context, globals, node) {\n    if (!this.root) {\n      this.root = Node.create_root(this.nodes);\n    }\n    return this.root.get_value(parent, context, globals, node)\n  }\n}\n\nExpression.prototype[Node.isExpressionOrIdentifierSymbol] = true;\n\nclass Arguments {\n  constructor (parser, args) {\n    this.parser = parser;\n    this.args = args;\n  }\n\n  get_value (parent, context, globals, node) {\n    var deReffedArgs = [];\n    for (var i = 0, j = this.args.length; i < j; ++i) {\n      deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));\n    }\n    return deReffedArgs\n  };\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\n/**\n * The following regular expressions were generated by\n *  https://mathiasbynens.be/demo/javascript-identifier-regex\n */\nvar IDStart = /[\\$A-Z_a-z\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B4\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D5F-\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FD5\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7AD\\uA7B0-\\uA7B7\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB65\\uAB70-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]/;\n\nvar IDContinue = 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Identifier {\n  constructor (parser, token, dereferences) {\n    this.token = token;\n    this.dereferences = dereferences;\n    this.parser = parser;\n  }\n\n  /**\n   * Apply all () and [] functions on the identifier to the lhs value e.g.\n   * a()[3] has deref functions that are essentially this:\n   *     [_deref_call, _deref_this where this=3]\n   *\n   * @param  {mixed} value  Should be an object.\n   * @return {mixed}        The dereferenced value.\n   *\n   * [1] We want to bind any function that is a method of an object, but not\n   *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where\n   *     we're given `data-bind='binding: obj.x'` and x is a computed will\n   *     break the computed's `this` and it will stop working as expected.\n   *\n   *     The test `!last_value.hasOwnProperty(member)`\n   *     distinguishes between functions on the prototype chain (prototypal\n   *     members) and value-members added directly to the object.  This may\n   *     not be the canonical test for this relationship, but it succeeds\n   *     in the known test cases.\n   *\n   *     See: `this` tests of our dereference function.\n   */\n  dereference (value, $context, globals, node) {\n    let member;\n    let refs = this.dereferences || [];\n    const $data = $context.$data || {};\n    let lastValue;  // becomes `this` in function calls to object properties.\n    let i, n;\n\n    for (i = 0, n = refs.length; i < n; ++i) {\n      member = Node.value_of(refs[i], $context, globals, node);\n\n      if (typeof value === 'function' && refs[i] instanceof Arguments) {\n        // fn(args)\n        value = value.apply(lastValue || $data, member);\n        lastValue = value;\n      } else {\n        // obj[x] or obj.x dereference.  Note that obj may be a function.\n        lastValue = value;\n        value = Node.value_of(value[member], $context, globals, node);\n      }\n    }\n\n    // [1] See note above.\n    if (typeof value === 'function' && n > 0 && lastValue !== value &&\n        !lastValue.hasOwnProperty(member)) {\n      return value.bind(lastValue)\n    }\n\n    return value\n  };\n\n  /**\n   * Return the value as one would get it from the top-level i.e.\n   * $data.token/$context.token/globals.token; this does not return intermediate\n   * values on a chain of members i.e. $data.hello.there -- requesting the\n   * Identifier('there').value will return $data/$context/globals.there.\n   *\n   * This will dereference using () or [arg] member.\n   * @param  {object | Identifier | Expression} parent\n   * @return {mixed}  Return the primitive or an accessor.\n   */\n  get_value (parent, context, globals, node) {\n    const intermediate = parent && !(parent instanceof Identifier)\n      ? Node.value_of(parent, context, globals, node)[this.token]\n      : context.lookup(this.token, globals, node);\n    return this.dereference(intermediate, context, globals, node)\n  }\n\n  assign (object, property, value) {\n    if (isWriteableObservable(object[property])) {\n      object[property](value);\n    } else if (!isObservable(object[property])) {\n      object[property] = value;\n    }\n  };\n\n  /**\n   * Set the value of the Identifier.\n   *\n   * @param {Mixed} new_value The value that Identifier is to be set to.\n   */\n  set_value (new_value, $context, globals) {\n    const $data = $context.$data || {};\n    const refs = this.dereferences || [];\n    let leaf = this.token;\n    let i, n, root;\n\n    if (Object.hasOwnProperty.call($data, leaf)) {\n      root = $data;\n    } else if (Object.hasOwnProperty.call($context, leaf)) {\n      root = $context;\n    } else if (Object.hasOwnProperty.call(globals, leaf)) {\n      root = globals;\n    } else {\n      throw new Error('Identifier::set_value -- ' +\n        \"The property '\" + leaf + \"' does not exist \" +\n        'on the $data, $context, or globals.')\n    }\n\n    // Degenerate case. {$data|$context|global}[leaf] = something;\n    n = refs.length;\n    if (n === 0) {\n      this.assign(root, leaf, new_value);\n      return\n    }\n\n    // First dereference is {$data|$context|global}[token].\n    root = root[leaf];\n\n    // We cannot use this.dereference because that gives the leaf; to evoke\n    // the ES5 setter we have to call `obj[leaf] = new_value`\n    for (i = 0; i < n - 1; ++i) {\n      leaf = refs[i];\n      if (leaf instanceof Arguments) {\n        root = root();\n      } else {\n        root = root[Node.value_of(leaf)];\n      }\n    }\n\n    // We indicate that a dereference is a function when it is `true`.\n    if (refs[i] === true) {\n      throw new Error('Cannot assign a value to a function.')\n    }\n\n    // Call the setter for the leaf.\n    if (refs[i]) {\n      this.assign(root, Node.value_of(refs[i]), new_value);\n    }\n  };\n\n  /**\n   * Determine if a character is a valid item in an identifier.\n   * Note that we do not check whether the first item is a number, nor do we\n   * support unicode identifiers here.\n   *\n   * From:  http://stackoverflow.com/a/9337047\n   * @param  {String}  ch  The character\n   * @return {Boolean}     True if this is a valid identifier\n   */\n  // function is_identifier_char(ch) {\n  //   return (ch >= 'A' && ch <= 'Z') ||\n  //          (ch >= 'a' && ch <= 'z') ||\n  //          (ch >= '0' && ch <= 9) ||\n  //           ch === '_' || ch === '$';\n  // }\n  static is_valid_start_char (ch) {\n    return IDStart.test(ch)\n  }\n\n  static is_valid_continue_char (ch) {\n    return IDContinue.test(ch)\n  }\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\nclass Ternary {\n  constructor (yes, no) {\n    Object.assign(this, {yes, no});\n  }\n\n  get_value () { return this }\n\n  get [Node.isExpressionOrIdentifierSymbol] () { return true }\n}\n\n/**\n * Originally based on (public domain):\n * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js\n */\n\nconst escapee = {\n  \"'\": \"'\",\n  '\"': '\"',\n  '`': '`',\n  '\\\\': '\\\\',\n  '/': '/',\n  '$': '$',\n  b: '\\b',\n  f: '\\f',\n  n: '\\n',\n  r: '\\r',\n  t: '\\t'\n};\n\n/**\n * Construct a new Parser instance with new Parser(node, context)\n * @param {Node} node    The DOM element from which we parsed the\n *                         content.\n * @param {object} context The Knockout context.\n * @param {object} globals An object containing any desired globals.\n */\nclass Parser {\n  white () {\n    var ch = this.ch;\n    while (ch && ch <= ' ') {\n      ch = this.next();\n    }\n    return this.comment(ch)\n  }\n\n/**\n * Slurp any C or C++ style comments\n */\n  comment (ch) {\n    if (ch !== '/') { return ch }\n    var p = this.at;\n    var second = this.lookahead();\n    if (second === '/') {\n      while (ch) {\n        ch = this.next();\n        if (ch === '\\n' || ch === '\\r') { break }\n      }\n      ch = this.next();\n    } else if (second === '*') {\n      while (ch) {\n        ch = this.next();\n        if (ch === '*' && this.lookahead() === '/') {\n          this.next();\n          break\n        }\n      }\n      if (!ch) {\n        this.error('Unclosed comment, starting at character ' + p);\n      }\n      this.next();\n      return this.white()\n    }\n    return ch\n  };\n\n  next (c) {\n    if (c && c !== this.ch) {\n      this.error(\"Expected '\" + c + \"' but got '\" + this.ch + \"'\");\n    }\n    this.ch = this.text.charAt(this.at);\n    this.at += 1;\n    return this.ch\n  }\n\n  lookahead () {\n    return this.text[this.at]\n  }\n\n  error (m) {\n    if (m instanceof Error) { throw m }\n    let [name, msg] = m.name ? [m.name, m.message] : [m, ''];\n    const message = `\\n${name} ${msg} of\n    ${this.text}\\n` + Array(this.at).join(' ') + '_/ 🔥 \\\\_\\n';\n    throw new Error(message)\n  }\n\n  name () {\n  // A name of a binding\n    var name = '';\n    var enclosedBy;\n    this.white();\n\n    var ch = this.ch;\n\n    if (ch === \"'\" || ch === '\"') {\n      enclosedBy = ch;\n      ch = this.next();\n    }\n\n    while (ch) {\n      if (enclosedBy && ch === enclosedBy) {\n        this.white();\n        ch = this.next();\n        if (ch !== ':' && ch !== ',') {\n          this.error(\n          'Object name: ' + name + ' missing closing ' + enclosedBy\n        );\n        }\n        return name\n      } else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {\n        return name\n      }\n      name += ch;\n      ch = this.next();\n    }\n\n    return name\n  }\n\n  number () {\n    let number;\n    let string = '';\n    let ch = this.ch;\n\n    if (ch === '-') {\n      string = '-';\n      ch = this.next('-');\n    }\n    while (ch >= '0' && ch <= '9') {\n      string += ch;\n      ch = this.next();\n    }\n    if (ch === '.') {\n      string += '.';\n      ch = this.next();\n      while (ch && ch >= '0' && ch <= '9') {\n        string += ch;\n        ch = this.next();\n      }\n    }\n    if (ch === 'e' || ch === 'E') {\n      string += ch;\n      ch = this.next();\n      if (ch === '-' || ch === '+') {\n        string += ch;\n        ch = this.next();\n      }\n      while (ch >= '0' && ch <= '9') {\n        string += ch;\n        ch = this.next();\n      }\n    }\n    number = +string;\n    if (!isFinite(number)) {\n      options.onError(new Error('Bad number: ' + number + ' in ' + string));\n    } else {\n      return number\n    }\n  }\n\n/**\n * Add a property to 'object' that equals the given value.\n * @param  {Object} object The object to add the value to.\n * @param  {String} key    object[key] is set to the given value.\n * @param  {mixed}  value  The value, may be a primitive or a function. If a\n *                         function it is unwrapped as a property.\n */\n  objectAddValue (object, key, value) {\n    if (value && value[Node.isExpressionOrIdentifierSymbol]) {\n      Object.defineProperty(object, key, {\n        get: () => Node.value_of(value, ...this.currentContextGlobals),\n        enumerable: true\n      });\n    } else if (Array.isArray(value)) {\n      Object.defineProperty(object, key, {\n        get: () => value.map(v => Node.value_of(v, ...this.currentContextGlobals)),\n        enumerable: true\n      });\n    } else {\n    // primitives\n      object[key] = value;\n    }\n  }\n\n  object () {\n    let key;\n    let object = {};\n    let ch = this.ch;\n\n    if (ch === '{') {\n      this.next('{');\n      ch = this.white();\n      if (ch === '}') {\n        ch = this.next('}');\n        return object\n      }\n      while (ch) {\n        if (ch === '\"' || ch === \"'\" || ch === '`') {\n          key = this.string();\n        } else {\n          key = this.name();\n        }\n        this.white();\n        ch = this.next(':');\n        if (Object.hasOwnProperty.call(object, key)) {\n          this.error('Duplicate key \"' + key + '\"');\n        }\n\n        this.objectAddValue(object, key, this.expression());\n\n        ch = this.white();\n        if (ch === '}') {\n          ch = this.next('}');\n          return object\n        }\n\n        this.next(',');\n        ch = this.white();\n      }\n    }\n    this.error('Bad object');\n  }\n\n/**\n * Read up to delim and return the string\n * @param  {string} delim The delimiter, either ' or \"\n * @return {string}       The string read.\n */\n  readString (delim) {\n    let string = '';\n    let nodes = [''];\n    let plusOp = operators['+'];\n    let hex;\n    let i;\n    let uffff;\n    let interpolate = delim === '`';\n    let ch = this.next();\n\n    while (ch) {\n      if (ch === delim) {\n        ch = this.next();\n        if (interpolate) { nodes.push(plusOp); }\n        nodes.push(string);\n        return nodes\n      }\n      if (ch === '\\\\') {\n        ch = this.next();\n        if (ch === 'u') {\n          uffff = 0;\n          for (i = 0; i < 4; i += 1) {\n            hex = parseInt(ch = this.next(), 16);\n            if (!isFinite(hex)) {\n              break\n            }\n            uffff = uffff * 16 + hex;\n          }\n          string += String.fromCharCode(uffff);\n        } else if (typeof escapee[ch] === 'string') {\n          string += escapee[ch];\n        } else {\n          break\n        }\n      } else if (interpolate && ch === '$') {\n        ch = this.next();\n        if (ch === '{') {\n          this.next('{');\n          nodes.push(plusOp);\n          nodes.push(string);\n          nodes.push(plusOp);\n          nodes.push(this.expression());\n          string = '';\n        // this.next('}');\n        } else {\n          string += '$' + ch;\n        }\n      } else {\n        string += ch;\n      }\n      ch = this.next();\n    }\n\n    this.error('Bad string');\n  }\n\n  string () {\n    var ch = this.ch;\n    if (ch === '\"') {\n      return this.readString('\"').join('')\n    } else if (ch === \"'\") {\n      return this.readString(\"'\").join('')\n    } else if (ch === '`') {\n      return Node.create_root(this.readString('`'))\n    }\n\n    this.error('Bad string');\n  }\n\n  array () {\n    let array = [];\n    let ch = this.ch;\n\n    if (ch === '[') {\n      ch = this.next('[');\n      this.white();\n      if (ch === ']') {\n        ch = this.next(']');\n        return array\n      }\n      while (ch) {\n        array.push(this.expression());\n        ch = this.white();\n        if (ch === ']') {\n          ch = this.next(']');\n          return array\n        }\n        this.next(',');\n        ch = this.white();\n      }\n    }\n    this.error('Bad array');\n  }\n\n  value () {\n    var ch;\n    this.white();\n    ch = this.ch;\n    switch (ch) {\n      case '{': return this.object()\n      case '[': return this.array()\n      case '\"': case \"'\": case '`': return this.string()\n      case '-': return this.number()\n      default:\n        return ch >= '0' && ch <= '9' ? this.number() : this.identifier()\n    }\n  }\n\n/**\n * Get the function for the given operator.\n * A `.precedence` value is added to the function, with increasing\n * precedence having a higher number.\n * @return {function} The function that performs the infix operation\n */\n  operator (opts) {\n    let op = '';\n    let opFn;\n    let ch = this.white();\n    let isIdentifierChar = Identifier.is_valid_start_char;\n\n    while (ch) {\n      if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||\n        ch === '\"' || ch === \"'\" || ch === '{' || ch === '(' ||\n        ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {\n        break\n      }\n\n      if (!opts.not_an_array && ch === '[') {\n        break\n      }\n\n      op += ch;\n      ch = this.next();\n\n    // An infix followed by the prefix e.g. a + @b\n    // TODO: other prefix unary operators\n      if (ch === '@') {\n        break\n      }\n\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n\n    if (op !== '') {\n      if (opts.prefix && op === '-') { op = '&-'; }\n      opFn = operators[op];\n\n      if (!opFn) {\n        this.error(\"Bad operator: '\" + op + \"'.\");\n      }\n    }\n\n    return opFn\n  }\n\n/**\n * Filters\n * Returns what the Node interprets as an \"operator\".\n * e.g.\n *   <span data-bind=\"text: name | fit:20 | uppercase\"></span>\n */\n  filter () {\n    let ch = this.next();\n    let args = [];\n    let nextFilter = function (v) { return v };\n    let name = this.name();\n\n    if (!options.filters[name]) {\n      options.onError('Cannot find filter by the name of: ' + name);\n    }\n\n    ch = this.white();\n\n    while (ch) {\n      if (ch === ':') {\n        ch = this.next();\n        args.push(this.expression('|'));\n      }\n\n      if (ch === '|') {\n        nextFilter = this.filter();\n        break\n      }\n\n      if (ch === ',') { break }\n\n      ch = this.white();\n    }\n\n    var filter = function filter (value, ignored, context, globals, node) {\n      var argValues = [value];\n\n      for (var i = 0, j = args.length; i < j; ++i) {\n        argValues.push(Node.value_of(args[i], context, globals, node));\n      }\n\n      return nextFilter(options.filters[name].apply(null, argValues))\n    };\n\n  // Lowest precedence.\n    filter.precedence = 1;\n    return filter\n  }\n\n/**\n * Parse an expression – builds an operator tree, in something like\n * Shunting-Yard.\n *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm\n *\n * @return {function}   A function that computes the value of the expression\n *                      when called or a primitive.\n */\n  expression (filterable) {\n    let op;\n    let nodes = [];\n    let ch = this.white();\n\n    while (ch) {\n    // unary prefix operators\n      op = this.operator({ prefix: true });\n      if (op) {\n        nodes.push(undefined);  // LHS Tree node.\n        nodes.push(op);\n        ch = this.white();\n      }\n\n      if (ch === '(') {\n        this.next();\n        nodes.push(this.expression());\n        this.next(')');\n      } else {\n        nodes.push(this.value());\n      }\n      ch = this.white();\n\n      if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||\n        ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {\n        break\n      }\n\n    // filters\n      if (ch === '|' && this.lookahead() !== '|' && filterable) {\n        nodes.push(this.filter());\n        nodes.push(undefined);\n        break\n      }\n\n    // infix or postfix operators\n      op = this.operator({ not_an_array: true });\n\n      if (op === operators['?']) {\n        this.ternary(nodes);\n        break\n      } else if (op === operators['.']) {\n        nodes.push(op);\n        nodes.push(this.member());\n        op = null;\n      } else if (op === operators['[']) {\n        nodes.push(op);\n        nodes.push(this.expression());\n        ch = this.next(']');\n        op = null;\n      } else if (op) {\n        nodes.push(op);\n      }\n\n      ch = this.white();\n\n      if (ch === ']' || (!op && ch === '(')) { break }\n    }\n\n    if (nodes.length === 0) {\n      return undefined\n    }\n\n    var dereferences = this.dereferences();\n\n    if (nodes.length === 1 && !dereferences.length) {\n      return nodes[0]\n    }\n\n    for (var i = 0, j = dereferences.length; i < j; ++i) {\n      var deref = dereferences[i];\n      if (deref.constructor === Arguments) {\n        nodes.push(operators.call);\n      } else {\n        nodes.push(operators['.']);\n      }\n      nodes.push(deref);\n    }\n\n    return new Expression(nodes)\n  }\n\n  ternary (nodes) {\n    var ternary = new Ternary();\n    ternary.yes = this.expression();\n    this.next(':');\n    ternary.no = this.expression();\n    nodes.push(operators['?']);\n    nodes.push(ternary);\n  }\n\n/**\n * Parse the arguments to a function, returning an Array.\n *\n */\n  funcArguments () {\n    let args = [];\n    let ch = this.next('(');\n\n    while (ch) {\n      ch = this.white();\n      if (ch === ')') {\n        this.next(')');\n        return new Arguments(this, args)\n      } else {\n        args.push(this.expression());\n        ch = this.white();\n      }\n      if (ch !== ')') { this.next(','); }\n    }\n\n    this.error('Bad arguments to function');\n  }\n\n/**\n * The literal string reference `abc` in an `x.abc` expression.\n */\n  member () {\n    let member = '';\n    let ch = this.white();\n    let isIdentifierChar = Identifier.is_valid_start_char;\n\n    while (ch) {\n      if (!isIdentifierChar(ch)) {\n        break\n      }\n      member += ch;\n      ch = this.next();\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n    return member\n  }\n\n/**\n * A dereference applies to an identifer, being either a function\n * call \"()\" or a membership lookup with square brackets \"[member]\".\n * @return {fn or undefined}  Dereference function to be applied to the\n *                            Identifier\n */\n  dereference () {\n    let member;\n    let ch = this.white();\n\n    while (ch) {\n      if (ch === '(') {\n      // a(...) function call\n        return this.funcArguments()\n      } else if (ch === '[') {\n      // a[x] membership\n        this.next('[');\n        member = this.expression();\n        this.white();\n        this.next(']');\n\n        return member\n      } else if (ch === '.') {\n      // a.x membership\n        this.next('.');\n        return this.member()\n      } else {\n        break\n      }\n    }\n  }\n\n  dereferences () {\n    let ch = this.white();\n    let dereferences = [];\n    let deref;\n\n    while (ch) {\n      deref = this.dereference();\n      if (deref !== undefined) {\n        dereferences.push(deref);\n      } else {\n        break\n      }\n    }\n    return dereferences\n  }\n\n  identifier () {\n    let token = '';\n    let isIdentifierChar = Identifier.is_valid_start_char;\n    let ch = this.white();\n\n    while (ch) {\n      if (!isIdentifierChar(ch)) {\n        break\n      }\n      token += ch;\n      ch = this.next();\n      isIdentifierChar = Identifier.is_valid_continue_char;\n    }\n    switch (token) {\n      case 'true': return true\n      case 'false': return false\n      case 'null': return null\n      case 'undefined': return void 0\n      case 'function':\n        throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.')\n    // return this.anonymous_fn();\n    }\n    return new Identifier(this, token, this.dereferences())\n  }\n\n  readBindings () {\n    let key;\n    let bindings = {};\n    let sep;\n    let expr;\n    let ch = this.ch;\n\n    while (ch) {\n      key = this.name();\n      sep = this.white();\n\n      if (!sep || sep === ',') {\n        if (sep) {\n          ch = this.next(',');\n        } else {\n          ch = '';\n        }\n      // A \"bare\" binding e.g. \"text\"; substitute value of 'null'\n      // so it becomes \"text: null\".\n        bindings[key] = null;\n      } else {\n        if (key.indexOf('.') !== -1) {\n        // Namespaced – i.e.\n        //    `attr.css: x` becomes `attr: { css: x }`\n        //     ^^^ - key\n          key = key.split('.');\n          bindings[key[0]] = bindings[key[0]] || {};\n\n          if (key.length !== 2) {\n            options.onError('Binding ' + key + ' should have two parts (a.b).');\n          } else if (bindings[key[0]].constructor !== Object) {\n            options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');\n          }\n\n          ch = this.next(':');\n          this.objectAddValue(bindings[key[0]], key[1], this.expression(true));\n        } else {\n          ch = this.next(':');\n          if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {\n          // Extend a namespaced bindings e.g. we've previously seen\n          // on.x, now we're seeing on: { 'abc' }.\n            expr = this.expression(true);\n            if (typeof expr !== 'object' || expr.constructor !== Object) {\n              options.onError('Expected plain object for ' + key + ' value.');\n            } else {\n              extend(bindings[key], expr);\n            }\n          } else {\n            bindings[key] = this.expression(true);\n          }\n        }\n\n        this.white();\n        if (this.ch) {\n          ch = this.next(',');\n        } else {\n          ch = '';\n        }\n      }\n    }\n    return bindings\n  }\n\n  valueAsAccessor (value, context, globals, node) {\n    if (!value) { return () => value }\n    if (typeof value === 'function') { return value }\n\n    if (value[Node.isExpressionOrIdentifierSymbol]) {\n      return () => Node.value_of(value, context, globals, node)\n    }\n\n    if (Array.isArray(value)) {\n      return () => value.map(v => Node.value_of(v, context, globals, node))\n    }\n\n    if (typeof (value) !== 'function') {\n      return () => clonePlainObjectDeep(value)\n    }\n\n    throw new Error('Value has cannot be converted to accessor: ' + value)\n  }\n\n  /**\n  * Convert result[name] from a value to a function (i.e. `valueAccessor()`)\n  * @param  {object} result [Map of top-level names to values]\n  * @return {object}        [Map of top-level names to functions]\n  *\n  * Accessors may be one of (below) constAccessor, identifierAccessor,\n  * expressionAccessor, or nodeAccessor.\n  */\n  convertToAccessors (result, context, globals, node) {\n    objectForEach(result, (name, value) => {\n      if (value instanceof Identifier) {\n        // Return a function that, with no arguments returns\n        // the value of the identifier, otherwise sets the\n        // value of the identifier to the first given argument.\n        Object.defineProperty(result, name, {\n          value: function (optionalValue, options$$1) {\n            const currentValue = value.get_value(undefined, context, globals, node);\n            if (arguments.length === 0) { return currentValue }\n            const unchanged = optionalValue === currentValue;\n            if (options$$1 && options$$1.onlyIfChanged && unchanged) { return }\n            return value.set_value(optionalValue, context, globals)\n          }\n        });\n      } else {\n        result[name] = this.valueAsAccessor(value, context, globals, node);\n      }\n    });\n    return result\n  }\n\n  runParse (source, fn) {\n    this.text = (source || '').trim();\n    this.at = 0;\n    this.ch = ' ';\n\n    try {\n      var result = fn();\n      this.white();\n      if (this.ch) {\n        this.error('Syntax Error');\n      }\n      return result\n    } catch (e) {\n      options.onError(e);\n    }\n  }\n\n  /**\n   * Get the bindings as name: accessor()\n   * @param  {string} source The binding string to parse.\n   * @return {object}        Map of name to accessor function.\n   */\n  parse (source, context = {}, globals = {}, node) {\n    if (!source) { return () => null }\n    this.currentContextGlobals = [context, globals, node];\n    const parseFn = () => this.readBindings();\n    const bindingAccessors = this.runParse(source, parseFn);\n    return this.convertToAccessors(bindingAccessors, context, globals, node)\n  }\n\n  /**\n   * Return a function that evaluates and returns the result of the expression.\n   */\n  parseExpression (source, context = {}, globals = {}, node) {\n    if (!source) { return () => '' }\n    this.currentContextGlobals = [context, globals, node];\n    const parseFn = () => this.expression(true);\n    const bindingAccessors = this.runParse(source, parseFn);\n    return this.valueAsAccessor(bindingAccessors, context, globals, node)\n  }\n}\n\n/* eslint no-cond-assign: 0 */\n\n// The following regular expressions will be used to split an object-literal string into tokens\n\n// These two match strings, either with double quotes or single quotes\nvar stringDouble = '\"(?:[^\"\\\\\\\\]|\\\\\\\\.)*\"';\nvar stringSingle = \"'(?:[^'\\\\\\\\]|\\\\\\\\.)*'\";\nvar stringRegexp = '/(?:[^/\\\\\\\\]|\\\\\\\\.)*/\\w*';\nvar specials = ',\"\\'{}()/:[\\\\]';\nvar everyThingElse = '[^\\\\s:,/][^' + specials + ']*[^\\\\s' + specials + ']';\nvar oneNotSpace = '[^\\\\s]';\nvar bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');\nvar divisionLookBehind = /[\\])\"'A-Za-z0-9_$]+$/;\nvar keywordRegexLookBehind = {\n    'in': 1,\n    'return': 1,\n    'typeof': 1\n  };\n\n/**\n * Break a binding string (data-bind='x: val, y: ..') into a stable array\n * of {key: value}.\n */\nfunction parseObjectLiteral(objectLiteralString) {\n  // Trim leading and trailing spaces from the string\n  var str = stringTrim(objectLiteralString);\n\n  // Trim braces '{' surrounding the whole object literal\n  if (str.charCodeAt(0) === 123) str = str.slice(1, -1);\n\n  // Split into tokens\n  var result = [],\n    toks = str.match(bindingToken),\n    key, values = [],\n    depth = 0;\n\n  if (!toks) { return [] }\n\n  // Append a comma so that we don't need a separate code block to deal with the last item\n  toks.push(',');\n\n  for (var i = 0, tok; tok = toks[i]; ++i) {\n    var c = tok.charCodeAt(0);\n    // A comma signals the end of a key/value pair if depth is zero\n    if (c === 44) { // \",\"\n      if (depth <= 0) {\n        result.push((key && values.length) ? {\n          key: key,\n          value: values.join('')\n        } : {\n          'unknown': key || values.join('')\n        });\n        key = depth = 0;\n        values = [];\n        continue;\n      }\n      // Simply skip the colon that separates the name and value\n    } else if (c === 58) { // \":\"\n      if (!depth && !key && values.length === 1) {\n        key = values.pop();\n        continue;\n      }\n      // A set of slashes is initially matched as a regular expression, but could be division\n    } else if (c === 47 && i && tok.length > 1) { // \"/\"\n      // Look at the end of the previous token to determine if the slash is actually division\n      var match = toks[i - 1].match(divisionLookBehind);\n      if (match && !keywordRegexLookBehind[match[0]]) {\n        // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)\n        str = str.substr(str.indexOf(tok) + 1);\n        toks = str.match(bindingToken);\n        toks.push(',');\n        i = -1;\n        // Continue with just the slash\n        tok = '/';\n      }\n      // Increment depth for parentheses, braces, and brackets so that interior commas are ignored\n    } else if (c === 40 || c === 123 || c === 91) { // '(', '{', '['\n      ++depth;\n    } else if (c === 41 || c === 125 || c === 93) { // ')', '}', ']'\n      --depth;\n      // The key will be the first token; if it's a string, trim the quotes\n    } else if (!key && !values.length && (c === 34 || c === 39)) { // '\"', \"'\"\n      tok = tok.slice(1, -1);\n    }\n    values.push(tok);\n  }\n\n  return result;\n}\n\nexport { Parser, Identifier, Arguments, Node, parseObjectLiteral };\n//# sourceMappingURL=tko.utils.parser.es6.js.map\n","import { dependencyDetection, subscribable } from 'tko.observable';\nimport { cloneNodes, getObjectOwnProperty, isDocumentFragment, isDomElement, makeArray, parseHtmlFragment, tagNameLower, tasks } from 'tko.utils';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar loadingSubscribablesCache = {};\nvar loadedDefinitionsCache = {};    // Tracks component loads that have already completed\n\nfunction loadComponentAndNotify(componentName, callback) {\n    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName),\n        completedAsync;\n    if (!_subscribable) {\n        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.\n        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();\n        _subscribable.subscribe(callback);\n\n        beginLoadingComponent(componentName, function(definition, config) {\n            var isSynchronousComponent = !!(config && config.synchronous);\n            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };\n            delete loadingSubscribablesCache[componentName];\n\n            // For API consistency, all loads complete asynchronously. However we want to avoid\n            // adding an extra task schedule if it's unnecessary (i.e., the completion is already\n            // async).\n            //\n            // You can bypass the 'always asynchronous' feature by putting the synchronous:true\n            // flag on your component configuration when you register it.\n            if (completedAsync || isSynchronousComponent) {\n                // Note that notifySubscribers ignores any dependencies read within the callback.\n                // See comment in loaderRegistryBehaviors.js for reasoning\n                _subscribable.notifySubscribers(definition);\n            } else {\n                tasks.schedule(function() {\n                    _subscribable.notifySubscribers(definition);\n                });\n            }\n        });\n        completedAsync = true;\n    } else {\n        _subscribable.subscribe(callback);\n    }\n}\n\nfunction beginLoadingComponent(componentName, callback) {\n    getFirstResultFromLoaders('getConfig', [componentName], function(config) {\n        if (config) {\n            // We have a config, so now load its definition\n            getFirstResultFromLoaders('loadComponent', [componentName, config], function(definition) {\n                callback(definition, config);\n            });\n        } else {\n            // The component has no config - it's unknown to all the loaders.\n            // Note that this is not an error (e.g., a module loading error) - that would abort the\n            // process and this callback would not run. For this callback to run, all loaders must\n            // have confirmed they don't know about this component.\n            callback(null, null);\n        }\n    });\n}\n\nfunction getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {\n    // On the first call in the stack, start with the full set of loaders\n    if (!candidateLoaders) {\n        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array\n    }\n\n    // Try the next candidate\n    var currentCandidateLoader = candidateLoaders.shift();\n    if (currentCandidateLoader) {\n        var methodInstance = currentCandidateLoader[methodName];\n        if (methodInstance) {\n            var wasAborted = false,\n                synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function(result) {\n                    if (wasAborted) {\n                        callback(null);\n                    } else if (result !== null) {\n                        // This candidate returned a value. Use it.\n                        callback(result);\n                    } else {\n                        // Try the next candidate\n                        getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n                    }\n                }));\n\n            // Currently, loaders may not return anything synchronously. This leaves open the possibility\n            // that we'll extend the API to support synchronous return values in the future. It won't be\n            // a breaking change, because currently no loader is allowed to return anything except undefined.\n            if (synchronousReturnValue !== undefined) {\n                wasAborted = true;\n\n                // Method to suppress exceptions will remain undocumented. This is only to keep\n                // KO's specs running tidily, since we can observe the loading got aborted without\n                // having exceptions cluttering up the console too.\n                if (!currentCandidateLoader.suppressLoaderExceptions) {\n                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');\n                }\n            }\n        } else {\n            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.\n            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n        }\n    } else {\n        // No candidates returned a value\n        callback(null);\n    }\n}\n\nvar registry = {\n  get (componentName, callback) {\n    var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);\n    if (cachedDefinition) {\n      // It's already loaded and cached. Reuse the same definition object.\n      // Note that for API consistency, even cache hits complete asynchronously by default.\n      // You can bypass this by putting synchronous:true on your component config.\n      if (cachedDefinition.isSynchronousComponent) {\n        dependencyDetection.ignore(function() { // See comment in loaderRegistryBehaviors.js for reasoning\n            callback(cachedDefinition.definition);\n        });\n      } else {\n        tasks.schedule(function() { callback(cachedDefinition.definition); });\n      }\n    } else {\n      // Join the loading process that is already underway, or start a new one.\n      loadComponentAndNotify(componentName, callback);\n    }\n  },\n\n  clearCachedDefinition (componentName) {\n    delete loadedDefinitionsCache[componentName];\n  },\n\n  _getFirstResultFromLoaders: getFirstResultFromLoaders,\n\n  loaders: []\n};\n\n// The default loader is responsible for two things:\n// 1. Maintaining the default in-memory registry of component configuration objects\n//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))\n// 2. Answering requests for components by fetching configuration objects\n//    from that default in-memory registry and resolving them into standard\n//    component definition objects (of the form { createViewModel: ..., template: ... })\n// Custom loaders may override either of these facilities, i.e.,\n// 1. To supply configuration objects from some other source (e.g., conventions)\n// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.\n\nvar defaultConfigRegistry = {};\n\nfunction register(componentName, config) {\n    if (!config) {\n        throw new Error('Invalid configuration for ' + componentName);\n    }\n\n    if (isRegistered(componentName)) {\n        throw new Error('Component ' + componentName + ' is already registered');\n    }\n\n    defaultConfigRegistry[componentName] = config;\n}\n\nfunction isRegistered(componentName) {\n    return defaultConfigRegistry.hasOwnProperty(componentName);\n}\n\nfunction unregister(componentName) {\n    delete defaultConfigRegistry[componentName];\n    registry.clearCachedDefinition(componentName);\n}\n\nvar defaultLoader = {\n    getConfig: function(componentName, callback) {\n        var result = defaultConfigRegistry.hasOwnProperty(componentName)\n            ? defaultConfigRegistry[componentName]\n            : null;\n        callback(result);\n    },\n\n    loadComponent: function(componentName, config, callback) {\n        var errorCallback = makeErrorCallback(componentName);\n        possiblyGetConfigFromAmd(errorCallback, config, function(loadedConfig) {\n            resolveConfig(componentName, errorCallback, loadedConfig, callback);\n        });\n    },\n\n    loadTemplate: function(componentName, templateConfig, callback) {\n        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);\n    },\n\n    loadViewModel: function(componentName, viewModelConfig, callback) {\n        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);\n    }\n};\n\nvar createViewModelKey = 'createViewModel';\n\n// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it\n// into the standard component definition format:\n//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.\n// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed\n// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,\n// so this is implemented manually below.\nfunction resolveConfig(componentName, errorCallback, config, callback) {\n    var result = {},\n        makeCallBackWhenZero = 2,\n        tryIssueCallback = function() {\n            if (--makeCallBackWhenZero === 0) {\n                callback(result);\n            }\n        },\n        templateConfig = config['template'],\n        viewModelConfig = config['viewModel'];\n\n    if (templateConfig) {\n        possiblyGetConfigFromAmd(errorCallback, templateConfig, function(loadedConfig) {\n            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function(resolvedTemplate) {\n                result['template'] = resolvedTemplate;\n                tryIssueCallback();\n            });\n        });\n    } else {\n        tryIssueCallback();\n    }\n\n    if (viewModelConfig) {\n        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function(loadedConfig) {\n            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function(resolvedViewModel) {\n                result[createViewModelKey] = resolvedViewModel;\n                tryIssueCallback();\n            });\n        });\n    } else {\n        tryIssueCallback();\n    }\n}\n\nfunction resolveTemplate(errorCallback, templateConfig, callback) {\n    if (typeof templateConfig === 'string') {\n        // Markup - parse it\n        callback(parseHtmlFragment(templateConfig));\n    } else if (templateConfig instanceof Array) {\n        // Assume already an array of DOM nodes - pass through unchanged\n        callback(templateConfig);\n    } else if (isDocumentFragment(templateConfig)) {\n        // Document fragment - use its child nodes\n        callback(makeArray(templateConfig.childNodes));\n    } else if (templateConfig['element']) {\n        var element = templateConfig['element'];\n        if (isDomElement(element)) {\n            // Element instance - copy its child nodes\n            callback(cloneNodesFromTemplateSourceElement(element));\n        } else if (typeof element === 'string') {\n            // Element ID - find it, then copy its child nodes\n            var elemInstance = document.getElementById(element);\n            if (elemInstance) {\n                callback(cloneNodesFromTemplateSourceElement(elemInstance));\n            } else {\n                errorCallback('Cannot find element with ID ' + element);\n            }\n        } else {\n            errorCallback('Unknown element type: ' + element);\n        }\n    } else {\n        errorCallback('Unknown template value: ' + templateConfig);\n    }\n}\n\nfunction resolveViewModel(errorCallback, viewModelConfig, callback) {\n    if (typeof viewModelConfig === 'function') {\n        // Constructor - convert to standard factory function format\n        // By design, this does *not* supply componentInfo to the constructor, as the intent is that\n        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only\n        // be used in factory functions, not viewmodel constructors.\n        callback(function (params /*, componentInfo */) {\n            return new viewModelConfig(params);\n        });\n    } else if (typeof viewModelConfig[createViewModelKey] === 'function') {\n        // Already a factory function - use it as-is\n        callback(viewModelConfig[createViewModelKey]);\n    } else if ('instance' in viewModelConfig) {\n        // Fixed object instance - promote to createViewModel format for API consistency\n        var fixedInstance = viewModelConfig['instance'];\n        callback(function (/* params, componentInfo */) {\n            return fixedInstance;\n        });\n    } else if ('viewModel' in viewModelConfig) {\n        // Resolved AMD module whose value is of the form { viewModel: ... }\n        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);\n    } else {\n        errorCallback('Unknown viewModel value: ' + viewModelConfig);\n    }\n}\n\nfunction cloneNodesFromTemplateSourceElement(elemInstance) {\n    switch (tagNameLower(elemInstance)) {\n    case 'script':\n        return parseHtmlFragment(elemInstance.text);\n    case 'textarea':\n        return parseHtmlFragment(elemInstance.value);\n    case 'template':\n        // For browsers with proper <template> element support (i.e., where the .content property\n        // gives a document fragment), use that document fragment.\n        if (isDocumentFragment(elemInstance.content)) {\n            return cloneNodes(elemInstance.content.childNodes);\n        }\n    }\n\n    // Regular elements such as <div>, and <template> elements on old browsers that don't really\n    // understand <template> and just treat it as a regular container\n    return cloneNodes(elemInstance.childNodes);\n}\n\n\nfunction possiblyGetConfigFromAmd(errorCallback, config, callback) {\n    if (typeof config.require === 'string') {\n        // The config is the value of an AMD module\n        if (window.amdRequire || window.require) {\n            (window.amdRequire || window.require)([config.require], callback);\n        } else {\n            errorCallback('Uses require, but no AMD loader is present');\n        }\n    } else {\n        callback(config);\n    }\n}\n\nfunction makeErrorCallback(componentName) {\n    return function (message) {\n        throw new Error('Component \\'' + componentName + '\\': ' + message);\n    };\n}\n\n\n// By default, the default loader is the only registered component loader\nregistry.loaders.push(defaultLoader);\n\n/**\n * Component --- Abstract Base Class\n *\n * This simplifies and compartmentalizes Components.  Use this:\n *\n *    class CompX extends ComponentABC {\n *    \tstatic get element () { return 'comp-x-id' }\n *    \tstatic get sync () { return false }\n *    \tstatic get elementName () { return 'comp-x' }\n *    }\n *    CompX.register()\n *\n * instead of:\n *\n *   class CompX {}\n *   \n *   ko.components.register('comp-x', {\n *     viewModel: CompX,\n *     synchronous: false,\n *     template: { element: 'comp-x' }\n *   })\n *\n * As well, gain all the benefits of a LifeCycle, namely automated\n * event and subscription addition/removal.\n * \n * NOTE: A Component created this way can add events to the component node\n * with `this.addEventListener(type, action)`.\n */\nclass ComponentABC extends LifeCycle {\n\t/**\n\t * @return {string} The custom node name of this component.\n\t */\n\tstatic get elementName () {\n\t\tthrow new Error(\"[ComponentABC] `elementName` must be overloaded.\")\t\n\t}\n\n\t/**\n\t * Overload this to return:\n\t * 1. A string of markup\n\t * 2. An array of DOM nodes\n\t * 3. A document fragment\n\t * 4. An AMD module (with `{require: 'some/template'}`)\n\t * @return {mixed} One of the accepted template types for the ComponentBinding.\n\t */\n\tstatic get template () { return { element: this.element } }\n\n\t/**\n\t * This is called by the default `template`.  Overload this to return:\n\t * 1. The element ID\n\t * 2. A DOM node itself\n\t * @return {string|HTMLElement} either the element ID or actual element.\n\t */\n\tstatic get element () {\n\t\tthrow new Error(\"[ComponentABC] `element` must be overloaded.\")\n\t}\n\n\t/**\n\t * @return {bool} True if the component shall load synchronously\n\t */\n\tstatic get sync () { return true }\n\n\tstatic register (name = this.elementName) {\n\t\tconst viewModel = this;\n\t\tconst {template} = this;\n\t\tconst synchronous = this.sync;\n\t\tregister(name, { viewModel, template, synchronous });\n\t}\n}\n\nvar index = {\n  ComponentABC,\n  // -- Registry --\n  get: registry.get,\n  clearCachedDefinition: registry.clearCachedDefinition,\n\n  // -- Loader --\n  register,\n  isRegistered,\n  unregister,\n  defaultLoader,\n  // \"Privately\" expose the underlying config registry for use in old-IE shim\n  _allRegisteredComponents: defaultConfigRegistry,\n\n  get loaders () { return registry.loaders },\n  set loaders (loaders) { registry.loaders = loaders; }\n};\n\nexport default index;\n//# sourceMappingURL=tko.utils.component.es6.js.map\n","import { unwrap } from 'tko.observable';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\nconst INNER_EXPRESSION = /^([\\s\\S]*)}}([\\s\\S]*?)\\{\\{([\\s\\S]*)$/;\nconst OUTER_EXPRESSION = /^([\\s\\S]*?)\\{\\{([\\s\\S]*)}}([\\s\\S]*)$/;\nconst BINDING_EXPRESSION = /^([^,\"'{}()/:[\\]\\s]+)\\s+([^\\s:].*)/;\n\nclass Interpolated {\n  constructor (text) {\n    this.text = text;\n  }\n\n  trim (string) {\n    return string === null ? '' : string.trim()\n  }\n}\n\nclass Expression extends Interpolated {\n  asAttr (context, globals, node) {\n    return new Parser().parseExpression(this.text, context, globals, node)()\n  }\n\n  * textNodeReplacement (textNode) {\n    const text = this.trim(this.text);\n    const ownerDocument = textNode ? textNode.ownerDocument : document;\n    const firstChar = text[0];\n    const lastChar = text[text.length - 1];\n    var closeComment = true;\n    var binding;\n\n    if (firstChar === '#') {\n      if (lastChar === '/') {\n        binding = text.slice(1, -1);\n      } else {\n        binding = text.slice(1);\n        closeComment = false;\n      }\n      const matches = binding.match(BINDING_EXPRESSION);\n      if (matches) {\n        binding = matches[1] + ':' + matches[2];\n      }\n    } else if (firstChar === '/') {\n      // replace only with a closing comment\n    } else if (firstChar === '{' && lastChar === '}') {\n      binding = 'html:' + this.trim(text.slice(1, -1));\n    } else {\n      binding = 'text:' + this.trim(text);\n    }\n\n    if (binding) {\n      yield ownerDocument.createComment('ko ' + binding);\n    }\n    if (closeComment) {\n      yield ownerDocument.createComment('/ko');\n    }\n  }\n}\n\nclass Text extends Interpolated {\n  asAttr () { return this.text }\n\n  * textNodeReplacement () {\n    yield document.createTextNode(this.text.replace(/\"/g, '\\\\\"'));\n  }\n}\n\n/**\n *          Interpolation Parsing\n */\nfunction * innerParse (text) {\n  const innerMatch = text.match(INNER_EXPRESSION);\n  if (innerMatch) {\n    const [pre, inner, post] = innerMatch.slice(1);\n    yield * innerParse(pre);\n    yield new Text(inner);\n    yield new Expression(post);\n  } else {\n    yield new Expression(text);\n  }\n}\n\nfunction * parseOuterMatch (outerMatch) {\n  if (!outerMatch) { return }\n  let [pre, inner, post] = outerMatch.slice(1);\n  yield new Text(pre);\n  yield * innerParse(inner);\n  yield new Text(post);\n}\n\nfunction * parseInterpolation (text) {\n  for (const textOrExpr of parseOuterMatch(text.match(OUTER_EXPRESSION))) {\n    if (textOrExpr.text) { yield textOrExpr; }\n  }\n}\n\n/**\n * These are bindings that are mapped specific attributes, such as\n * two-way communication (value/checked) or which have anti-collision\n * properties (css).\n */\nconst DEFAULT_ATTRIBUTE_BINDING_MAP = {\n  value: 'value',\n  checked: 'checked',\n  class: 'css'\n};\n\n/**\n *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>\n */\nclass AttributeMustacheProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  constructor (params = {}) {\n    super(params);\n    this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);\n    this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;\n  }\n\n  * attributesToInterpolate (attributes) {\n    for (const attr of Array.from(attributes)) {\n      if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) { continue }\n      if (attr.specified && attr.value.includes('{{')) { yield attr; }\n    }\n  }\n\n  nodeHasBindings (node) {\n    return !this.attributesToInterpolate(node.attributes).next().done\n  }\n\n  partsTogether (parts, context, node, ...valueToWrite) {\n    if (parts.length > 1) {\n      return parts\n        .map(p => unwrap(p.asAttr(context, this.globals, node))).join('')\n    }\n    // It may be a writeable observable e.g. value=\"{{ value }}\".\n    const part = parts[0].asAttr(context, this.globals);\n    if (valueToWrite.length) { part(valueToWrite[0]); }\n    return part\n  }\n\n  attributeBinding (name, parts) {\n    return [name, parts]\n  }\n\n  * bindingParts (node, context) {\n    for (const attr of this.attributesToInterpolate(node.attributes)) {\n      const parts = Array.from(parseInterpolation(attr.value));\n      if (parts.length) { yield this.attributeBinding(attr.name, parts); }\n    }\n  }\n\n  getPossibleDirectBinding (attrName) {\n    const bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];\n    return bindingName && this.bindingHandlers.get(attrName)\n  }\n\n  * bindingObjects (node, context) {\n    for (const [attrName, parts] of this.bindingParts(node, context)) {\n      const bindingForAttribute = this.getPossibleDirectBinding(attrName);\n      const handler = bindingForAttribute ? attrName : `attr.${attrName}`;\n      const accessorFn = bindingForAttribute\n        ? (...v) => this.partsTogether(parts, context, node, ...v)\n        : (...v) => ({[attrName]: this.partsTogether(parts, context, node, ...v)});\n      node.removeAttribute(attrName);\n      yield { [handler]: accessorFn };\n    }\n  }\n\n  getBindingAccessors (node, context) {\n    return Object.assign({}, ...this.bindingObjects(node, context))\n  }\n}\n\n/**\n * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.\n *\n * This binding must come before the VirtualProvider.\n */\nclass TextMustacheProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 3 ] } // document.TEXT_NODE\n\n  * textToNodes (textNode) {\n    const parent = textNode.parentNode;\n    const isTextarea = parent && parent.nodeName === 'TEXTAREA';\n    const hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');\n\n    if (!hasStash || isTextarea) { return }\n\n    for (const part of parseInterpolation(textNode.nodeValue)) {\n      yield * part.textNodeReplacement(textNode);\n    }\n  }\n\n  textInterpolation (textNode) {\n    const newNodes = Array.from(this.textToNodes(textNode));\n\n    if (newNodes.length === 0) { return }\n\n    if (textNode.parentNode) {\n      const parent = textNode.parentNode;\n      const n = newNodes.length;\n      for (let i = 0; i < n; ++i) {\n        parent.insertBefore(newNodes[i], textNode);\n      }\n      parent.removeChild(textNode);\n    }\n\n    return newNodes\n  }\n\n  /**\n   * We convert as follows:\n   *\n   *   {{# ... }} into <!-- ko ... -->\n   *   {{/ ... }} into <!-- /ko -->\n   *   {{# ... /}} into <!-- ko ... --><!-- /ko -->\n   *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->\n   *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->\n   *\n   * VirtualProvider can then pick up and do the actual binding.\n   */\n  preprocessNode (node) {\n    return this.textInterpolation(node)\n  }\n}\n\nexport { AttributeMustacheProvider, TextMustacheProvider, parseInterpolation };\n//# sourceMappingURL=tko.provider.mustache.es6.js.map\n","import { addDisposeCallback, anyDomNodeIsAttachedToDocument, arrayForEach, arrayIndexOf, arrayMap, arrayPushAll, arrayRemoveItem, cleanNode, compareArrays, domData, extend, fixUpContinuousNodeArray, objectForEach, objectMap, options, removeNode, replaceDomNodes, tagNameLower, virtualElements } from 'tko.utils';\nimport { computed } from 'tko.computed';\nimport { dependencyDetection, isObservable, observable, unwrap } from 'tko.observable';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar storedBindingContextDomDataKey = domData.nextKey();\n\n\n\n// The bindingContext constructor is only called directly to create the root context. For child\n// contexts, use bindingContext.createChildContext or bindingContext.extend.\nfunction bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {\n\n    var self = this,\n        isFunc = typeof(dataItemOrAccessor) == \"function\" && !isObservable(dataItemOrAccessor),\n        nodes,\n        subscribable;\n\n    // The binding context object includes static properties for the current, parent, and root view models.\n    // If a view model is actually stored in an observable, the corresponding binding context object, and\n    // any child contexts, must be updated when the view model is changed.\n    function updateContext() {\n        // Most of the time, the context will directly get a view model object, but if a function is given,\n        // we call the function to retrieve the view model. If the function accesses any observables or returns\n        // an observable, the dependency is tracked, and those observables can later cause the binding\n        // context to be updated.\n        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor,\n            dataItem = unwrap(dataItemOrObservable);\n\n        if (parentContext) {\n            // When a \"parent\" context is given, register a dependency on the parent context. Thus whenever the\n            // parent context is updated, this context will also be updated.\n            if (parentContext._subscribable)\n                parentContext._subscribable();\n\n            // Copy $root and any custom properties from the parent context\n            extend(self, parentContext);\n\n            // Because the above copy overwrites our own properties, we need to reset them.\n            self._subscribable = subscribable;\n        } else {\n            self.$parents = [];\n            self.$root = dataItem;\n\n            // Export 'ko' in the binding context so it will be available in bindings and templates\n            // even if 'ko' isn't exported as a global, such as when using an AMD loader.\n            // See https://github.com/SteveSanderson/knockout/issues/490\n            self.ko = options.knockoutInstance;\n        }\n        self.$rawData = dataItemOrObservable;\n        self.$data = dataItem;\n        if (dataItemAlias)\n            self[dataItemAlias] = dataItem;\n\n        // The extendCallback function is provided when creating a child context or extending a context.\n        // It handles the specific actions needed to finish setting up the binding context. Actions in this\n        // function could also add dependencies to this binding context.\n        if (extendCallback)\n            extendCallback(self, parentContext, dataItem);\n\n        return self.$data;\n    }\n\n    function disposeWhen() {\n        return nodes && !anyDomNodeIsAttachedToDocument(nodes);\n    }\n\n    if (settings && settings.exportDependencies) {\n        // The \"exportDependencies\" option means that the calling code will track any dependencies and re-create\n        // the binding context when they change.\n        updateContext();\n        return;\n    }\n\n    subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });\n\n    // At this point, the binding context has been initialized, and the \"subscribable\" computed observable is\n    // subscribed to any observables that were accessed in the process. If there is nothing to track, the\n    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in\n    // the context object.\n    if (subscribable.isActive()) {\n        self._subscribable = subscribable;\n\n        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed\n        subscribable.equalityComparer = null;\n\n        // We need to be able to dispose of this computed observable when it's no longer needed. This would be\n        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and\n        // we cannot assume that those nodes have any relation to each other. So instead we track any node that\n        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.\n\n        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates\n        nodes = [];\n        subscribable._addNode = function(node) {\n            nodes.push(node);\n            addDisposeCallback(node, function(node) {\n                arrayRemoveItem(nodes, node);\n                if (!nodes.length) {\n                    subscribable.dispose();\n                    self._subscribable = subscribable = undefined;\n                }\n            });\n        };\n    }\n}\n\nbindingContext.prototype.lookup = function (token, globals, node) {\n  // short circuits\n  switch (token) {\n    case '$element': return node\n    case '$context': return this\n    case 'this': case '$data': return this.$data\n  }\n  const $data = this.$data;\n  // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.\n  if ($data instanceof Object && token in $data) { return $data[token] }\n  if (token in this) { return this[token] }\n  if (token in globals) { return globals[token] }\n\n  throw new Error(`The variable \"${token}\" was not found on $data, $context, or globals.`)\n};\n\n// Extend the binding context hierarchy with a new view model object. If the parent context is watching\n// any observables, the new child context will automatically get a dependency on the parent context.\n// But this does not mean that the $data value of the child context will also get updated. If the child\n// view model also depends on the parent view model, you must provide a function that returns the correct\n// view model on each update.\nbindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {\n    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function(self, parentContext) {\n        // Extend the context hierarchy by setting the appropriate pointers\n        self.$parentContext = parentContext;\n        self.$parent = parentContext.$data;\n        self.$parents = (parentContext.$parents || []).slice(0);\n        self.$parents.unshift(self.$parent);\n        if (extendCallback)\n            extendCallback(self);\n    }, settings);\n};\n\n// Extend the binding context with new custom properties. This doesn't change the context hierarchy.\n// Similarly to \"child\" contexts, provide a function here to make sure that the correct values are set\n// when an observable view model is updated.\nbindingContext.prototype.extend = function(properties) {\n    // If the parent context references an observable view model, \"_subscribable\" will always be the\n    // latest view model object. If not, \"_subscribable\" isn't set, and we can use the static \"$data\" value.\n    return new bindingContext(this._subscribable || this.$data, this, null, function(self, parentContext) {\n        // This \"child\" context doesn't directly track a parent observable view model,\n        // so we need to manually set the $rawData value to match the parent.\n        self.$rawData = parentContext.$rawData;\n        extend(self, typeof(properties) === \"function\" ? properties() : properties);\n    });\n};\n\nbindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {\n    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { \"exportDependencies\": true });\n};\n\n\nfunction storedBindingContextForNode(node, bindingContext) {\n    if (arguments.length == 2) {\n        domData.set(node, storedBindingContextDomDataKey, bindingContext);\n        if (bindingContext._subscribable)\n            bindingContext._subscribable._addNode(node);\n    } else {\n        return domData.get(node, storedBindingContextDomDataKey);\n    }\n}\n\n\n// Retrieving binding context from arbitrary nodes\nfunction contextFor(node) {\n    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)\n    switch (node.nodeType) {\n    case 1:\n    case 8:\n        var context = storedBindingContextForNode(node);\n        if (context) return context;\n        if (node.parentNode) return contextFor(node.parentNode);\n        break;\n    }\n    return undefined;\n}\n\n\nfunction dataFor(node) {\n    var context = contextFor(node);\n    return context ? context.$data : undefined;\n}\n\nclass BindingHandler extends LifeCycle {\n  constructor (params) {\n    super();\n    const {$element, valueAccessor, allBindings, $context} = params;\n    Object.assign(this, {\n      valueAccessor,\n      allBindings,\n      $element,\n      $context,\n      $data: $context.$data\n    });\n\n    this.anchorTo($element);\n  }\n\n  get value () { return this.valueAccessor() }\n  set value (v) { return this.valueAccessor(v) }\n\n  get controlsDescendants () { return false }\n\n  static get allowVirtualElements () { return false }\n  static get isBindingHandlerClass () { return true }\n\n  /* Overload this for asynchronous bindings or bindings that recursively\n     apply bindings (e.g. components, foreach, template).\n\n     A binding should be complete when it has run through once, notably\n     in server-side bindings for pre-rendering.\n  */\n  get bindingCompleted () { return true }\n\n  static registerAs (name, provider = options.bindingProviderInstance) {\n    provider.bindingHandlers.set(name, this);\n  }\n}\n\n/**\n * An AsyncBindingHandler shall call `completeBinding` when the binding\n * is to be considered complete.\n */\nclass AsyncBindingHandler extends BindingHandler {\n  constructor (params) {\n    super(params);\n    this.bindingCompletion = new options.Promise((resolve) => { this.completeBinding = resolve; });\n  }\n\n  get bindingCompleted () { return this.bindingCompletion }\n}\n\n/**\n * We have no guarantees, for users employing legacy bindings,\n * that it has not been changed with a modification like\n *\n *    ko.bindingHandlers[name] = { init: ...}\n *\n * ... so we have to keep track by way of a map.\n */\nconst PossibleWeakMap = options.global.WeakMap || Map;\nconst legacyBindingMap = new PossibleWeakMap();\n\nclass LegacyBindingHandler extends BindingHandler {\n  constructor (params) {\n    super(params);\n    const handler = this.handler;\n\n    if (typeof handler.dispose === 'function') {\n      this.addDisposable(handler);\n    }\n\n    try {\n      this.initReturn = handler.init && handler.init(...this.legacyArgs);\n    } catch (e) { params.onError('init', e); }\n\n    if (typeof handler.update === 'function') {\n      this.computed(() => {\n        try {\n          handler.update(...this.legacyArgs);\n        } catch (e) {\n          params.onError('update', e);\n        }\n      });\n    }\n  }\n\n  get legacyArgs () {\n    return [\n      this.$element, this.valueAccessor, this.allBindings,\n      this.$data, this.$context\n    ]\n  }\n\n  get controlsDescendants () {\n    const objectToTest = this.initReturn || this.handler || {};\n    return objectToTest.controlsDescendantBindings\n  }\n\n  /**\n   * Create a handler instance from the `origin`, which may be:\n   *\n   * 1. an object (becomes LegacyBindingHandler)\n   * 2. a function (becomes LegacyBindingHandler with `init: function`)\n   *\n   * If given an object (the only kind supported in knockout 3.x and before), it\n   * shall draw the `init`, `update`, and `allowVirtualElements` properties\n   */\n  static getOrCreateFor (key, handler) {\n    if (legacyBindingMap.has(handler)) {\n      return legacyBindingMap.get(handler)\n    }\n    const newLegacyHandler = this.createFor(key, handler);\n    legacyBindingMap.set(handler, newLegacyHandler);\n    return newLegacyHandler\n  }\n\n  static createFor (key, handler) {\n    if (typeof handler === 'function') {\n      const [initFn, disposeFn] = [handler, handler.dispose];\n      return class extends LegacyBindingHandler {\n        get handler () {\n          const init = initFn.bind(this);\n          const dispose = disposeFn ? disposeFn.bind(this) : null;\n          return { init, dispose }\n        }\n        static get after () { return handler.after }\n        static get allowVirtualElements () {\n          return handler.allowVirtualElements || virtualElements.allowedBindings[key]\n        }\n      }\n    }\n\n    if (typeof handler === 'object') {\n      return class extends LegacyBindingHandler {\n        get handler () { return handler }\n        static get after () { return handler.after }\n        static get allowVirtualElements () {\n          return handler.allowVirtualElements || virtualElements.allowedBindings[key]\n        }\n      }\n    }\n\n    throw new Error('The given handler is not an appropriate type.')\n  }\n}\n\n/* eslint no-cond-assign: 0 */\n\n// The following element types will not be recursed into during binding.\nvar bindingDoesNotRecurseIntoElementTypes = {\n    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,\n    // because it's unexpected and a potential XSS issue.\n    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer\n    // and because such elements' contents are always intended to be bound in a different context\n    // from where they appear in the document.\n  'script': true,\n  'textarea': true,\n  'template': true\n};\n\n// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers\nfunction getBindingHandler (bindingKey) {\n  const handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);\n  if (!handler) { return }\n  if (handler.isBindingHandlerClass) { return handler }\n  return LegacyBindingHandler.getOrCreateFor(bindingKey, handler)\n}\n\n// Returns the valueAccesor function for a binding value\nfunction makeValueAccessor (value) {\n  return function () {\n    return value\n  }\n}\n\n// Returns the value of a valueAccessor function\nfunction evaluateValueAccessor (valueAccessor) {\n  return valueAccessor()\n}\n\n// Given a function that returns bindings, create and return a new object that contains\n// binding value-accessors functions. Each accessor function calls the original function\n// so that it always gets the latest value and all dependencies are captured. This is used\n// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.\nfunction makeAccessorsFromFunction (callback) {\n  return objectMap(dependencyDetection.ignore(callback), function (value, key) {\n    return function () {\n      return callback()[key]\n    }\n  })\n}\n\n// Given a bindings function or object, create and return a new object that contains\n// binding value-accessors functions. This is used by ko.applyBindingsToNode.\nfunction makeBindingAccessors (bindings, context, node) {\n  if (typeof bindings === 'function') {\n    return makeAccessorsFromFunction(bindings.bind(null, context, node))\n  } else {\n    return objectMap(bindings, makeValueAccessor)\n  }\n}\n\n// This function is used if the binding provider doesn't include a getBindingAccessors function.\n// It must be called with 'this' set to the provider instance.\nfunction getBindingsAndMakeAccessors (node, context) {\n  return makeAccessorsFromFunction(this.getBindings.bind(this, node, context))\n}\n\nfunction applyBindingsToDescendantsInternal (bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {\n  var currentChild;\n  var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n  const provider = options.bindingProviderInstance;\n  const preprocessNode = provider.preprocessNode;\n\n    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's\n    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to\n    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that\n    // trigger insertion of <template> contents at that point in the document.\n  if (preprocessNode) {\n    while (currentChild = nextInQueue) {\n      nextInQueue = virtualElements.nextSibling(currentChild);\n      preprocessNode.call(provider, currentChild);\n    }\n        // Reset nextInQueue for the next loop\n    nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n  }\n\n  while (currentChild = nextInQueue) {\n        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position\n    nextInQueue = virtualElements.nextSibling(currentChild);\n    applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);\n  }\n}\n\nfunction hasBindings (node) {\n  const provider = options.bindingProviderInstance;\n  return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node)\n}\n\nfunction applyBindingsToNodeAndDescendantsInternal (bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n  // Perf optimisation: Apply bindings only if...\n  // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)\n  //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those\n  // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)\n  var isElement = nodeVerified.nodeType === 1;\n  if (isElement) { // Workaround IE <= 8 HTML parsing weirdness\n    virtualElements.normaliseVirtualElementDomStructure(nodeVerified);\n  }\n\n  var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)\n                             hasBindings(nodeVerified); // Case (2)\n\n  const {shouldBindDescendants} = shouldApplyBindings\n    ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)\n    : { shouldBindDescendants: true };\n\n  if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {\n    // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,\n    //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,\n    //    hence bindingContextsMayDifferFromDomParentElement is false\n    //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may\n    //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,\n    //    hence bindingContextsMayDifferFromDomParentElement is true\n    applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);\n  }\n}\n\nvar boundElementDomDataKey = domData.nextKey();\n\nfunction * topologicalSortBindings (bindings) {\n  const results = [];\n  // Depth-first sort\n  const bindingsConsidered = {};    // A temporary record of which bindings are already in 'result'\n  const cyclicDependencyStack = []; // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it\n\n  objectForEach(bindings, function pushBinding (bindingKey) {\n    if (!bindingsConsidered[bindingKey]) {\n      const binding = getBindingHandler(bindingKey);\n      if (!binding) { return }\n        // First add dependencies (if any) of the current binding\n      if (binding.after) {\n        cyclicDependencyStack.push(bindingKey);\n        arrayForEach(binding.after, function (bindingDependencyKey) {\n          if (!bindings[bindingDependencyKey]) { return }\n          if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {\n            throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '))\n          } else {\n            pushBinding(bindingDependencyKey);\n          }\n        });\n        cyclicDependencyStack.length--;\n      }\n        // Next add the current binding\n      results.push([ bindingKey, binding ]);\n    }\n    bindingsConsidered[bindingKey] = true;\n  });\n\n  for (const result of results) { yield result; }\n}\n\nfunction applyBindingsToNodeInternal (node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified\n  var alreadyBound = domData.get(node, boundElementDomDataKey);\n  if (!sourceBindings) {\n    if (alreadyBound) {\n      onBindingError({\n        during: 'apply',\n        errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),\n        element: node,\n        bindingContext: bindingContext$$1\n      });\n      return false\n    }\n    domData.set(node, boundElementDomDataKey, true);\n  }\n\n    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because\n    // we can easily recover it just by scanning up the node's ancestors in the DOM\n    // (note: here, parent node means \"real DOM parent\" not \"virtual parent\", as there's no O(1) way to find the virtual parent)\n  if (!alreadyBound && bindingContextMayDifferFromDomParentElement) { storedBindingContextForNode(node, bindingContext$$1); }\n\n    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings\n  var bindings;\n  if (sourceBindings && typeof sourceBindings !== 'function') {\n    bindings = sourceBindings;\n  } else {\n    const provider = options.bindingProviderInstance;\n    const getBindings = provider.getBindingAccessors || getBindingsAndMakeAccessors;\n\n    if (provider.FOR_NODE_TYPES.includes(node.nodeType)) {\n          // Get the binding from the provider within a computed observable so that we can update the bindings whenever\n          // the binding context is updated or if the binding provider accesses observables.\n      var bindingsUpdater = computed(\n              function () {\n                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings.call(provider, node, bindingContext$$1);\n                  // Register a dependency on the binding context to support observable view models.\n                if (bindings && bindingContext$$1._subscribable) { bindingContext$$1._subscribable(); }\n                return bindings\n              },\n              null, { disposeWhenNodeIsRemoved: node }\n          );\n\n      if (!bindings || !bindingsUpdater.isActive()) { bindingsUpdater = null; }\n    }\n  }\n\n  var bindingHandlerThatControlsDescendantBindings;\n  if (bindings) {\n    const allBindingHandlers = {};\n    domData.set(node, 'bindingHandlers', allBindingHandlers);\n\n        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding\n        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets\n        // the latest binding value and registers a dependency on the binding updater.\n    const getValueAccessor = bindingsUpdater\n            ? (bindingKey) => function (optionalValue) {\n              var valueAccessor = bindingsUpdater()[bindingKey];\n              if (arguments.length === 0) {\n                return evaluateValueAccessor(valueAccessor)\n              } else {\n                return valueAccessor(optionalValue)\n              }\n            } : (bindingKey) => bindings[bindingKey];\n\n        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated\n    function allBindings () {\n      return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor)\n    }\n        // The following is the 3.x allBindings API\n    allBindings.has = (key) => key in bindings;\n    allBindings.get = (key) => bindings[key] && evaluateValueAccessor(getValueAccessor(key));\n\n    for (const [key, BindingHandlerClass] of topologicalSortBindings(bindings)) {\n        // Go through the sorted bindings, calling init and update for each\n      function reportBindingError (during, errorCaptured) {\n        onBindingError({\n          during,\n          errorCaptured,\n          bindings,\n          allBindings,\n          bindingKey: key,\n          bindingContext: bindingContext$$1,\n          element: node,\n          valueAccessor: getValueAccessor(key)\n        });\n      }\n\n      if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {\n        throw new Error(`The binding [${key}] cannot be used with virtual elements`)\n      }\n\n      try {\n        const bindingHandler = dependencyDetection.ignore(() =>\n          new BindingHandlerClass({\n            allBindings,\n            $element: node,\n            $context: bindingContext$$1,\n            onError: reportBindingError,\n            valueAccessor (...v) { return getValueAccessor(key)(...v) }\n          })\n        );\n\n              // Expose the bindings via domData.\n        allBindingHandlers[key] = bindingHandler;\n\n        if (bindingHandler.controlsDescendants) {\n          if (bindingHandlerThatControlsDescendantBindings !== undefined) { throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.') }\n          bindingHandlerThatControlsDescendantBindings = key;\n        }\n\n        if (bindingHandler.bindingCompleted instanceof options.Promise) {\n          asyncBindingsApplied.add(bindingHandler.bindingCompleted);\n        }\n      } catch (err) {\n        reportBindingError('creation', err);\n      }\n    }\n  }\n\n  return {\n    shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined\n  }\n}\n\nfunction getBindingContext (viewModelOrBindingContext) {\n  return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)\n    ? viewModelOrBindingContext\n    : new bindingContext(viewModelOrBindingContext)\n}\n\nfunction applyBindingAccessorsToNode (node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {\n  if (node.nodeType === 1) { // If it's an element, workaround IE <= 8 HTML parsing weirdness\n    virtualElements.normaliseVirtualElementDomStructure(node);\n  }\n  return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied)\n}\n\nfunction applyBindingsToNode (node, bindings, viewModelOrBindingContext) {\n  const asyncBindingsApplied = new Set();\n  var context = getBindingContext(viewModelOrBindingContext);\n  applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction applyBindingsToDescendants (viewModelOrBindingContext, rootNode) {\n  const asyncBindingsApplied = new Set();\n  if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {\n    applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n  }\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction applyBindings (viewModelOrBindingContext, rootNode) {\n  const asyncBindingsApplied = new Set();\n  // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.\n  if (!options.jQuery === undefined && options.jQuery) {\n    options.jQuery = options.jQuery;\n  }\n\n  if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) { throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node') }\n  rootNode = rootNode || options.document.body; // Make \"rootNode\" parameter optional\n\n  applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n  return options.Promise.all(asyncBindingsApplied)\n}\n\nfunction onBindingError (spec) {\n  var error;\n  if (spec.bindingKey) {\n        // During: 'init' or initial 'update'\n    error = spec.errorCaptured;\n    spec.message = 'Unable to process binding \"' + spec.bindingKey +\n            '\" in binding \"' + spec.bindingKey +\n            '\"\\nMessage: ' + (error.message ? error.message : error);\n  } else {\n        // During: 'apply'\n    error = spec.errorCaptured;\n  }\n  try {\n    extend(error, spec);\n  } catch (e) {\n        // Read-only error e.g. a DOMEXception.\n    spec.stack = error.stack;\n    error = new Error(error.message ? error.message : error);\n    extend(error, spec);\n  }\n  options.onError(error);\n}\n\n/* eslint no-cond-assign: 0 */\n// Objective:\n// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,\n//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node\n// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node\n//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we\n//   previously mapped - retain those nodes, and just insert/delete other ones\n\n// \"callbackAfterAddingNodes\" will be invoked after any \"mapping\"-generated nodes are inserted into the container node\n// You can use this, for example, to activate bindings on those nodes.\n\nfunction mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {\n    // Map this array value inside a dependentObservable so we re-map when any dependency changes\n    var mappedNodes = [];\n    var dependentObservable = computed(function() {\n        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];\n\n        // On subsequent evaluations, just replace the previously-inserted DOM nodes\n        if (mappedNodes.length > 0) {\n            replaceDomNodes(mappedNodes, newMappedNodes);\n            if (callbackAfterAddingNodes)\n                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);\n        }\n\n        // Replace the contents of the mappedNodes array, thereby updating the record\n        // of which nodes would be deleted if valueToMap was itself later removed\n        mappedNodes.length = 0;\n        arrayPushAll(mappedNodes, newMappedNodes);\n    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function() { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });\n    return { mappedNodes : mappedNodes, dependentObservable : (dependentObservable.isActive() ? dependentObservable : undefined) };\n}\n\nvar lastMappingResultDomDataKey = domData.nextKey();\nvar deletedItemDummyValue = domData.nextKey();\n\nfunction setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {\n    // Compare the provided array against the previous one\n    array = array || [];\n    options$$1 = options$$1 || {};\n    var isFirstExecution = domData.get(domNode, lastMappingResultDomDataKey) === undefined;\n    var lastMappingResult = domData.get(domNode, lastMappingResultDomDataKey) || [];\n    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });\n    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);\n\n    // Build the new mapping result\n    var newMappingResult = [];\n    var lastMappingResultIndex = 0;\n    var newMappingResultIndex = 0;\n\n    var nodesToDelete = [];\n    var itemsToProcess = [];\n    var itemsForBeforeRemoveCallbacks = [];\n    var itemsForMoveCallbacks = [];\n    var itemsForAfterAddCallbacks = [];\n    var mapData;\n\n    function itemMovedOrRetained(editScriptIndex, oldPosition) {\n        mapData = lastMappingResult[oldPosition];\n        if (newMappingResultIndex !== oldPosition)\n            itemsForMoveCallbacks[editScriptIndex] = mapData;\n        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray\n        mapData.indexObservable(newMappingResultIndex++);\n        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);\n        newMappingResult.push(mapData);\n        itemsToProcess.push(mapData);\n    }\n\n    function callCallback(callback, items) {\n        if (callback) {\n            for (var i = 0, n = items.length; i < n; i++) {\n                if (items[i]) {\n                    arrayForEach(items[i].mappedNodes, function(node) {\n                        callback(node, i, items[i].arrayEntry);\n                    });\n                }\n            }\n        }\n    }\n\n    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {\n        movedIndex = editScriptItem['moved'];\n        switch (editScriptItem['status']) {\n        case \"deleted\":\n            if (movedIndex === undefined) {\n                mapData = lastMappingResult[lastMappingResultIndex];\n\n                // Stop tracking changes to the mapping for these nodes\n                if (mapData.dependentObservable) {\n                    mapData.dependentObservable.dispose();\n                    mapData.dependentObservable = undefined;\n                }\n\n                // Queue these nodes for later removal\n                if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {\n                    if (options$$1['beforeRemove']) {\n                        newMappingResult.push(mapData);\n                        itemsToProcess.push(mapData);\n                        if (mapData.arrayEntry === deletedItemDummyValue) {\n                            mapData = null;\n                        } else {\n                            itemsForBeforeRemoveCallbacks[i] = mapData;\n                        }\n                    }\n                    if (mapData) {\n                        nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);\n                    }\n                }\n            }\n            lastMappingResultIndex++;\n            break;\n\n        case \"retained\":\n            itemMovedOrRetained(i, lastMappingResultIndex++);\n            break;\n\n        case \"added\":\n            if (movedIndex !== undefined) {\n                itemMovedOrRetained(i, movedIndex);\n            } else {\n                mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };\n                newMappingResult.push(mapData);\n                itemsToProcess.push(mapData);\n                if (!isFirstExecution)\n                    itemsForAfterAddCallbacks[i] = mapData;\n            }\n            break;\n        }\n    }\n\n    // Store a copy of the array items we just considered so we can difference it next time\n    domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);\n\n    // Call beforeMove first before any changes have been made to the DOM\n    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);\n\n    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)\n    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);\n\n    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)\n    i = 0;\n    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {\n        // Get nodes for newly added items\n        if (!mapData.mappedNodes)\n            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));\n\n        // Put nodes in the right place if they aren't there already\n        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {\n            if (node !== nextNode)\n                virtualElements.insertAfter(domNode, node, lastNode);\n        }\n\n        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)\n        if (!mapData.initialized && callbackAfterAddingNodes) {\n            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);\n            mapData.initialized = true;\n        }\n    }\n\n    // If there's a beforeRemove callback, call it after reordering.\n    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using\n    // some sort of animation, which is why we first reorder the nodes that will be removed. If the\n    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.\n    // Perhaps we'll make that change in the future if this scenario becomes more common.\n    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);\n\n    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item\n    // as already \"removed\" so we won't call beforeRemove for it again, and it ensures that the item won't match up\n    // with an actual item in the array and appear as \"retained\" or \"moved\".\n    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {\n        if (itemsForBeforeRemoveCallbacks[i]) {\n            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;\n        }\n    }\n\n    // Finally call afterMove and afterAdd callbacks\n    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);\n    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);\n}\n\nexport { BindingHandler, AsyncBindingHandler, bindingContext, storedBindingContextForNode, contextFor, dataFor, getBindingHandler, applyBindingAccessorsToNode, applyBindingsToNode, applyBindingsToDescendants, applyBindings, setDomNodeChildrenFromArrayMapping };\n//# sourceMappingURL=tko.bind.es6.js.map\n","import { dependencyDetection, isObservable, observable, peek, unwrap } from 'tko.observable';\nimport { arrayFilter, domData, domNodeIsAttachedToDocument, extend, fixUpContinuousNodeArray, ieVersion, makeArray, memoization, moveCleanedNodesToContainerElement, options, parseHtmlFragment, replaceDomNodes, setHtml, tagNameLower, virtualElements } from 'tko.utils';\nimport { AsyncBindingHandler, applyBindings, bindingContext, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\nimport { computed } from 'tko.computed';\n\n// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving\n// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)\n//\n// Two are provided by default:\n//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element\n//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but\n//                                           without reading/writing the actual element text content, since it will be overwritten\n//                                           with the rendered template output.\n// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.\n// Template sources need to have the following functions:\n//   text() \t\t\t- returns the template text from your storage location\n//   text(value)\t\t- writes the supplied template text to your storage location\n//   data(key)\t\t\t- reads values stored using data(key, value) - see below\n//   data(key, value)\t- associates \"value\" with this template and the key \"key\". Is used to store information like \"isRewritten\".\n//\n// Optionally, template sources can also have the following functions:\n//   nodes()            - returns a DOM element containing the nodes of this template, where available\n//   nodes(value)       - writes the given DOM element to your storage location\n// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()\n// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().\n//\n// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were\n// using and overriding \"makeTemplateSource\" to return an instance of your custom template source.\n\n// ---- ko.templateSources.domElement -----\n\n// template types\nvar templateScript = 1;\nvar templateTextArea = 2;\nvar templateTemplate = 3;\nvar templateElement = 4;\n\nfunction domElement(element) {\n    this.domElement = element;\n\n    if (!element) { return; }\n    var tagNameLower$$1 = tagNameLower(element);\n    this.templateType =\n        tagNameLower$$1 === \"script\" ? templateScript :\n        tagNameLower$$1 === \"textarea\" ? templateTextArea :\n            // For browsers with proper <template> element support, where the .content property gives a document fragment\n        tagNameLower$$1 == \"template\" && element.content && element.content.nodeType === 11 ? templateTemplate :\n        templateElement;\n}\n\ndomElement.prototype.text = function(/* valueToWrite */) {\n    var elemContentsProperty = this.templateType === templateScript ? \"text\"\n                             : this.templateType === templateTextArea ? \"value\"\n                             : \"innerHTML\";\n\n    if (arguments.length == 0) {\n        return this.domElement[elemContentsProperty];\n    } else {\n        var valueToWrite = arguments[0];\n        if (elemContentsProperty === \"innerHTML\")\n            setHtml(this.domElement, valueToWrite);\n        else\n            this.domElement[elemContentsProperty] = valueToWrite;\n    }\n};\n\nvar dataDomDataPrefix = domData.nextKey() + \"_\";\ndomElement.prototype.data = function(key /*, valueToWrite */) {\n    if (arguments.length === 1) {\n        return domData.get(this.domElement, dataDomDataPrefix + key);\n    } else {\n        domData.set(this.domElement, dataDomDataPrefix + key, arguments[1]);\n    }\n};\n\nvar templatesDomDataKey = domData.nextKey();\nfunction getTemplateDomData(element) {\n    return domData.get(element, templatesDomDataKey) || {};\n}\nfunction setTemplateDomData(element, data) {\n    domData.set(element, templatesDomDataKey, data);\n}\n\ndomElement.prototype.nodes = function(/* valueToWrite */) {\n    var element = this.domElement;\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(element),\n            containerData = templateData.containerData;\n        return containerData || (\n            this.templateType === templateTemplate ? element.content :\n            this.templateType === templateElement ? element :\n            undefined);\n    } else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(element, {containerData: valueToWrite});\n    }\n};\n\n// ---- ko.templateSources.anonymousTemplate -----\n// Anonymous templates are normally saved/retrieved as DOM nodes through \"nodes\".\n// For compatibility, you can also read \"text\"; it will be serialized from the nodes on demand.\n// Writing to \"text\" is still supported, but then the template data will not be available as DOM nodes.\n\nfunction anonymousTemplate(element) {\n    this.domElement = element;\n}\n\nanonymousTemplate.prototype = new domElement();\nanonymousTemplate.prototype.constructor = anonymousTemplate;\nanonymousTemplate.prototype.text = function(/* valueToWrite */) {\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(this.domElement);\n        if (templateData.textData === undefined && templateData.containerData)\n            templateData.textData = templateData.containerData.innerHTML;\n        return templateData.textData;\n    } else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(this.domElement, {textData: valueToWrite});\n    }\n};\n\n// If you want to make a custom template engine,\n//\n// [1] Inherit from this class (like ko.nativeTemplateEngine does)\n// [2] Override 'renderTemplateSource', supplying a function with this signature:\n//\n//        function (templateSource, bindingContext, options) {\n//            // - templateSource.text() is the text of the template you should render\n//            // - bindingContext.$data is the data you should pass into the template\n//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,\n//            //     and bindingContext.$root available in the template too\n//            // - options gives you access to any other properties set on \"data-bind: { template: options }\"\n//            // - templateDocument is the document object of the template\n//            //\n//            // Return value: an array of DOM nodes\n//        }\n//\n// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:\n//\n//        function (script) {\n//            // Return value: Whatever syntax means \"Evaluate the JavaScript statement 'script' and output the result\"\n//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'\n//        }\n//\n//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.\n//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)\n//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.\n\nfunction templateEngine() { }\n\nextend(templateEngine.prototype, {\n  renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n      options$$1.onError(\"Override renderTemplateSource\");\n  },\n\n  createJavaScriptEvaluatorBlock: function (script) {\n      options.onError(\"Override createJavaScriptEvaluatorBlock\");\n  },\n\n  makeTemplateSource: function(template, templateDocument) {\n      // Named template\n      if (typeof template == \"string\") {\n          templateDocument = templateDocument || document;\n          var elem = templateDocument.getElementById(template);\n          if (!elem)\n              options.onError(\"Cannot find template with ID \" + template);\n          return new domElement(elem);\n      } else if ((template.nodeType == 1) || (template.nodeType == 8)) {\n          // Anonymous template\n          return new anonymousTemplate(template);\n      } else\n          options.onError(\"Unknown template type: \" + template);\n  },\n\n  renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {\n      var templateSource = this['makeTemplateSource'](template, templateDocument);\n      return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);\n  }\n});\n\nvar _templateEngine;\n\nfunction setTemplateEngine (tEngine) {\n  if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {\n        // TODO: ko.templateEngine to appropriate name\n    throw new Error('templateEngine must inherit from ko.templateEngine')\n  }\n  _templateEngine = tEngine;\n}\n\nfunction invokeForEachNodeInContinuousRange (firstNode, lastNode, action) {\n  let node;\n  let nextInQueue = firstNode;\n  let firstOutOfRangeNode = virtualElements.nextSibling(lastNode);\n  while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {\n    nextInQueue = virtualElements.nextSibling(node);\n    action(node, nextInQueue);\n  }\n}\n\nfunction activateBindingsOnContinuousNodeArray (continuousNodeArray, bindingContext$$1, afterBindingCallback) {\n  // To be used on any nodes that have been rendered by a template and have been inserted into some parent element\n  // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because\n  // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,\n  // (1) Does a regular \"applyBindings\" to associate bindingContext with this node and to activate any non-memoized bindings\n  // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)\n\n  if (continuousNodeArray.length) {\n    var firstNode = continuousNodeArray[0];\n    var lastNode = continuousNodeArray[continuousNodeArray.length - 1];\n    var parentNode = firstNode.parentNode;\n    var provider = options.bindingProviderInstance;\n    var preprocessNode = provider.preprocessNode;\n\n    if (preprocessNode) {\n      invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {\n        var nodePreviousSibling = node.previousSibling;\n        var newNodes = preprocessNode.call(provider, node);\n        if (newNodes) {\n          if (node === firstNode) { firstNode = newNodes[0] || nextNodeInRange; }\n          if (node === lastNode) { lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling; }\n        }\n      });\n\n      // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.\n      // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real\n      // first node needs to be in the array).\n      continuousNodeArray.length = 0;\n      if (!firstNode) { // preprocessNode might have removed all the nodes, in which case there's nothing left to do\n        return\n      }\n      if (firstNode === lastNode) {\n        continuousNodeArray.push(firstNode);\n      } else {\n        continuousNodeArray.push(firstNode, lastNode);\n        fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n      }\n    }\n\n    // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)\n    // whereas a regular applyBindings won't introduce new memoized nodes\n    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n      if (node.nodeType === 1 || node.nodeType === 8) { applyBindings(bindingContext$$1, node).then(afterBindingCallback); }\n    });\n    invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n      if (node.nodeType === 1 || node.nodeType === 8) { memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]); }\n    });\n\n    // Make sure any changes done by applyBindings or unmemoize are reflected in the array\n    fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n  }\n}\n\nfunction getFirstNodeFromPossibleArray (nodeOrNodeArray) {\n  return nodeOrNodeArray.nodeType ? nodeOrNodeArray\n                                    : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]\n                                    : null\n}\n\nfunction executeTemplate (targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {\n  options$$1 = options$$1 || {};\n  var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n  var templateDocument = (firstTargetNode || template || {}).ownerDocument;\n  var templateEngineToUse = (options$$1.templateEngine || _templateEngine);\n  var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);\n\n    // Loosely check result is an array of DOM nodes\n  if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) { throw new Error('Template engine must return an array of DOM nodes') }\n\n  var haveAddedNodesToParent = false;\n  switch (renderMode) {\n    case 'replaceChildren':\n      virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);\n      haveAddedNodesToParent = true;\n      break\n    case 'replaceNode':\n      replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);\n      haveAddedNodesToParent = true;\n      break\n    case 'ignoreTargetNode': break\n    default:\n      throw new Error('Unknown renderMode: ' + renderMode)\n  }\n\n  if (haveAddedNodesToParent) {\n    activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);\n    if (options$$1.afterRender) { dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]); }\n  }\n\n  return renderedNodesArray\n}\n\nfunction resolveTemplateName (template, data, context) {\n    // The template can be specified as:\n  if (isObservable(template)) {\n    // 1. An observable, with string value\n    return template()\n  } else if (typeof template === 'function') {\n    // 2. A function of (data, context) returning a string\n    return template(data, context)\n  } else {\n    // 3. A string\n    return template\n  }\n}\n\nfunction renderTemplate (template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {\n  options$$1 = options$$1 || {};\n  if ((options$$1.templateEngine || _templateEngine) === undefined) { throw new Error('Set a template engine before calling renderTemplate') }\n  renderMode = renderMode || 'replaceChildren';\n\n  if (targetNodeOrNodeArray) {\n    var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n\n    var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode) }; // Passive disposal (on next evaluation)\n    var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;\n\n    return computed( // So the DOM is automatically updated when any dependency changes\n      function () {\n        // Ensure we've got a proper binding context to work with\n        var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))\n              ? dataOrBindingContext\n              : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });\n\n        var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);\n        const renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);\n\n        if (renderMode === 'replaceNode') {\n          targetNodeOrNodeArray = renderedNodesArray;\n          firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n        }\n      },\n      null,\n      { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved }\n    )\n  } else {\n        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node\n    return memoization.memoize(function (domNode) {\n      renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');\n    })\n  }\n}\n\nfunction renderTemplateForEach (template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {\n    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then\n    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.\n  var arrayItemContext;\n\n    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode\n  function executeTemplateForArrayItem (arrayValue, index) {\n        // Support selecting template as a function of the data being rendered\n    arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {\n      context['$index'] = index;\n    });\n\n    var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);\n    return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback)\n  }\n\n    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode\n  var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {\n    activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);\n    if (options$$1['afterRender']) { options$$1['afterRender'](addedNodesArray, arrayValue); }\n\n        // release the \"cache\" variable, so that it can be collected by\n        // the GC when its value isn't used from within the bindings anymore.\n    arrayItemContext = null;\n  };\n\n  return computed(function () {\n    var unwrappedArray = unwrap(arrayOrObservableArray) || [];\n    if (typeof unwrappedArray.length !== 'number') { unwrappedArray = [unwrappedArray]; }\n\n    // Filter out any entries marked as destroyed\n    var filteredArray = arrayFilter(unwrappedArray, function (item) {\n      return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy'])\n    });\n\n    // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).\n    // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.\n    dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);\n  }, null, { disposeWhenNodeIsRemoved: targetNode })\n}\n\nlet templateComputedDomDataKey = domData.nextKey();\n\nclass TemplateBindingHandler extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    const element = this.$element;\n    const bindingValue = unwrap(this.value);\n    let container;\n\n    // Expose 'conditional' for `else` chaining.\n    domData.set(element, 'conditional', {\n      elseChainSatisfied: observable(true)\n    });\n\n    // Support anonymous templates\n    if (typeof bindingValue === 'string' || bindingValue.name) {\n            // It's a named template - clear the element\n      virtualElements.emptyNode(element);\n    } else if ('nodes' in bindingValue) {\n            // We've been given an array of DOM nodes. Save them as the template source.\n            // There is no known use case for the node array being an observable array (if the output\n            // varies, put that behavior *into* your template - that's what templates are for), and\n            // the implementation would be a mess, so assert that it's not observable.\n      var nodes = bindingValue.nodes || [];\n      if (isObservable(nodes)) {\n        throw new Error('The \"nodes\" option must be a plain, non-observable array.')\n      }\n      container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent\n      new anonymousTemplate(element)['nodes'](container);\n    } else {\n            // It's an anonymous template - store the element contents, then clear the element\n      const templateNodes = virtualElements.childNodes(element);\n      container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent\n      new anonymousTemplate(element).nodes(container);\n    }\n    this.computed(this.onValueChange.bind(this));\n  }\n\n  onValueChange () {\n    const element = this.$element;\n    const bindingContext$$1 = this.$context;\n    var value = this.value;\n    var options$$1 = unwrap(value);\n    var shouldDisplay = true;\n    var templateComputed = null;\n    var elseChainSatisfied = domData.get(element, 'conditional').elseChainSatisfied;\n    var templateName;\n\n    if (typeof options$$1 === 'string') {\n      templateName = value;\n      options$$1 = {};\n    } else {\n      templateName = options$$1.name;\n\n      // Support \"if\"/\"ifnot\" conditions\n      if ('if' in options$$1) {\n        shouldDisplay = unwrap(options$$1.if);\n      }\n\n      if (shouldDisplay && 'ifnot' in options$$1) {\n        shouldDisplay = !unwrap(options$$1.ifnot);\n      }\n    }\n\n    if ('foreach' in options$$1) {\n      // Render once for each data point (treating data set as empty if shouldDisplay==false)\n      var dataArray = (shouldDisplay && options$$1.foreach) || [];\n      templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);\n\n      elseChainSatisfied((unwrap(dataArray) || []).length !== 0);\n    } else if (shouldDisplay) {\n      // Render once for this single data point (or use the viewModel if no data was provided)\n      var innerBindingContext = ('data' in options$$1)\n        ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as)  // Given an explitit 'data' value, we create a child binding context for it\n        : bindingContext$$1;                                                        // Given no explicit 'data' value, we retain the same binding context\n      templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);\n      elseChainSatisfied(true);\n    } else {\n      virtualElements.emptyNode(element);\n      elseChainSatisfied(false);\n    }\n\n    // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)\n    this.disposeOldComputedAndStoreNewOne(element, templateComputed);\n  }\n\n  disposeOldComputedAndStoreNewOne (element, newComputed) {\n    let oldComputed = domData.get(element, templateComputedDomDataKey);\n    if (oldComputed && (typeof oldComputed.dispose === 'function')) { oldComputed.dispose(); }\n    domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nfunction nativeTemplateEngine () {\n}\n\nnativeTemplateEngine.prototype = new templateEngine();\nnativeTemplateEngine.prototype.constructor = nativeTemplateEngine;\nnativeTemplateEngine.prototype.renderTemplateSource = function(templateSource, bindingContext$$1, options$$1, templateDocument) {\n    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly\n        templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null,\n        templateNodes = templateNodesFunc ? templateSource.nodes() : null;\n\n    if (templateNodes) {\n        return makeArray(templateNodes.cloneNode(true).childNodes);\n    } else {\n        var templateText = templateSource.text();\n        return parseHtmlFragment(templateText, templateDocument);\n    }\n};\n\n\nnativeTemplateEngine.instance = new nativeTemplateEngine();\nsetTemplateEngine(nativeTemplateEngine.instance);\n\n// \"foreach: someExpression\" is equivalent to \"template: { foreach: someExpression }\"\n// \"foreach: { data: someExpression, afterAdd: myfn }\" is equivalent to \"template: { foreach: someExpression, afterAdd: myfn }\"\nclass TemplateForEachBindingHandler extends TemplateBindingHandler {\n  get value () {\n    const modelValue = this.valueAccessor();\n    const unwrappedValue = peek(modelValue);    // Unwrap without setting a dependency here\n\n        // If unwrappedValue is the array, pass in the wrapped value on its own\n        // The value will be unwrapped and tracked within the template binding\n        // (See https://github.com/SteveSanderson/knockout/issues/523)\n    if (!unwrappedValue || typeof unwrappedValue.length === 'number') {\n      return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance }\n    }\n\n    // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates\n    unwrap(modelValue);\n    return {\n      foreach: unwrappedValue.data,\n      as: unwrappedValue.as,\n      includeDestroyed: unwrappedValue.includeDestroyed,\n      afterAdd: unwrappedValue.afterAdd,\n      beforeRemove: unwrappedValue.beforeRemove,\n      afterRender: unwrappedValue.afterRender,\n      beforeMove: unwrappedValue.beforeMove,\n      afterMove: unwrappedValue.afterMove,\n      templateEngine: nativeTemplateEngine.instance\n    }\n  }\n}\n\n//    'let': letBinding,\n//    template: template,\n\nconst bindings = {\n  foreach: TemplateForEachBindingHandler,\n  template: TemplateBindingHandler\n};\n\nexport { bindings, nativeTemplateEngine, templateEngine, setTemplateEngine, renderTemplate, TemplateBindingHandler, domElement, anonymousTemplate };\n//# sourceMappingURL=tko.binding.template.es6.js.map\n","import { cleanNode, cloneNodes, domData, virtualElements } from 'tko.utils';\nimport { dependencyDetection, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\n\n/**\n * Test a node for whether it represents an \"else\" condition.\n * @param  {HTMLElement}  node to be tested\n * @return {Boolean}      true when\n *\n * Matches <!-- else -->\n */\nfunction isElseNode (node) {\n  return node.nodeType === 8 &&\n        node.nodeValue.trim().toLowerCase() === 'else'\n}\n\nfunction detectElse (element) {\n  var children = virtualElements.childNodes(element);\n  for (var i = 0, j = children.length; i < j; ++i) {\n    if (isElseNode(children[i])) { return true }\n  }\n  return false\n}\n\n/**\n * Clone the nodes, returning `ifNodes`, `elseNodes`\n * @param  {HTMLElement} element The nodes to be cloned\n * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.\n * @return {object}         Containing the cloned nodes.\n */\nfunction cloneIfElseNodes (element, hasElse) {\n  const children = virtualElements.childNodes(element);\n  const ifNodes = [];\n  const elseNodes = [];\n  let target = ifNodes;\n\n  for (var i = 0, j = children.length; i < j; ++i) {\n    if (hasElse && isElseNode(children[i])) {\n      target = elseNodes;\n      hasElse = false;\n    } else {\n      target.push(cleanNode(children[i].cloneNode(true)));\n    }\n  }\n\n  return { ifNodes, elseNodes }\n}\n\n/**\n * Create a DOMbinding that controls DOM nodes presence\n *\n * Covers e.g.\n *\n * 1. DOM Nodes contents\n *\n * <div data-bind='if: x'>\n * <!-- else --> ... an optional \"if\"\n * </div>\n *\n * 2. Virtual elements\n *\n * <!-- ko if: x -->\n * <!-- else -->\n * <!-- /ko -->\n *\n * 3. Else binding\n * <div data-bind='if: x'></div>\n * <div data-bind='else'></div>\n */\nclass ConditionalBindingHandler extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    this.hasElse = detectElse(this.$element);\n    const elseChainSatisfied = this.completesElseChain = observable();\n\n    domData.set(this.$element, 'conditional', { elseChainSatisfied });\n\n    this.computed(this.render.bind(this));\n  }\n\n  get elseChainIsAlreadySatisfied () { return false }\n  get needsRefresh () {\n    return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate\n  }\n  get shouldDisplayIf () { return !!unwrap(this.value) }\n\n  getIfElseNodes () {\n    if (this.ifElseNodes) { return this.ifElseNodes }\n    if (dependencyDetection.getDependenciesCount() || this.hasElse) {\n      return cloneIfElseNodes(this.$element, this.hasElse)\n    }\n  }\n\n  render () {\n    // Create any dependencies on values created in value-functions.\n    if (typeof this.value === 'function') { this.value(); }\n    const isFirstRender = !this.ifElseNodes;\n    let shouldDisplayIf = this.shouldDisplayIf;\n    let needsRefresh = this.needsRefresh;\n\n    if (this.elseChainIsAlreadySatisfied) {\n      shouldDisplayIf = false;\n      needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;\n      this.completesElseChain(true);\n    } else {\n      this.completesElseChain(this.shouldDisplayIf);\n    }\n\n    if (!needsRefresh) { return }\n\n    this.ifElseNodes = this.getIfElseNodes();\n\n    if (shouldDisplayIf) {\n      if (!isFirstRender || this.hasElse) {\n        virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));\n      }\n    } else if (this.ifElseNodes) {\n      virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));\n    } else {\n      virtualElements.emptyNode(this.$element);\n    }\n\n    applyBindingsToDescendants(this.bindingContext, this.$element)\n      .then(this.completeBinding);\n\n    this.didDisplayOnLastUpdate = shouldDisplayIf;\n  }\n\n  get bindingContext () { return this.$context }\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nclass IfBindingHandler extends ConditionalBindingHandler {}\n\nclass UnlessBindingHandler extends ConditionalBindingHandler {\n  get shouldDisplayIf () { return !super.shouldDisplayIf }\n}\n\nclass ElseBindingHandler extends ConditionalBindingHandler {\n  get shouldDisplayIf () { return super.shouldDisplayIf || this.value === undefined }\n\n  /**\n   * Return any conditional that precedes the given node.\n   * @return {object}      { elseChainSatisfied: observable }\n   */\n  get elseChainIsAlreadySatisfied () {\n    if (!this._elseChain) { this._elseChain = this.readElseChain(); }\n    return unwrap(this._elseChain.elseChainSatisfied)\n  }\n\n  readElseChain () {\n    let node = this.$element;\n    do {\n      node = node.previousSibling;\n    } while (node && node.nodeType !== 1 && node.nodeType !== 8)\n\n    if (!node) { return false }\n\n    if (node.nodeType === 8) {\n      node = virtualElements.previousSibling(node);\n    }\n\n    return domData.get(node, 'conditional') || {}\n  }\n}\n\nclass WithBindingHandler extends ConditionalBindingHandler {\n  get needsRefresh () { return true }\n  get bindingContext () {\n    return this.$context.createStaticChildContext(this.value)\n  }\n}\n\nconst bindings = {\n  'if': IfBindingHandler,\n  'with': WithBindingHandler,\n  ifnot: UnlessBindingHandler,\n  unless: UnlessBindingHandler,\n  'else': ElseBindingHandler,\n  'elseif': ElseBindingHandler\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.if.es6.js.map\n","import { arrayForEach, cleanNode, createSymbolOrString, domData, domNodeIsContainedBy, options, virtualElements } from 'tko.utils';\nimport { isObservable, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants, contextFor } from 'tko.bind';\n\n// index.js\n// --------\n// Fast For Each\n//\n// Employing sound techniques to make a faster Knockout foreach binding.\n// --------\n\n//      Utilities\nconst MAX_LIST_SIZE = 9007199254740991;\n\n// from https://github.com/jonschlinkert/is-plain-object\nfunction isPlainObject (o) {\n  return !!o && typeof o === 'object' && o.constructor === Object\n}\n\nconst supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';\n\n// Get a copy of the (possibly virtual) child nodes of the given element,\n// put them into a container, then empty the given node.\nfunction makeTemplateNode (sourceNode) {\n  var container = document.createElement('div');\n  var parentNode;\n  if (sourceNode.content) {\n    // For e.g. <template> tags\n    parentNode = sourceNode.content;\n  } else if (sourceNode.tagName === 'SCRIPT') {\n    parentNode = document.createElement('div');\n    parentNode.innerHTML = sourceNode.text;\n  } else {\n    // Anything else e.g. <div>\n    parentNode = sourceNode;\n  }\n  arrayForEach(virtualElements.childNodes(parentNode), function (child) {\n    // FIXME - This cloneNode could be expensive; we may prefer to iterate over the\n    // parentNode children in reverse (so as not to foul the indexes as childNodes are\n    // removed from parentNode when inserted into the container)\n    if (child) {\n      container.insertBefore(child.cloneNode(true), null);\n    }\n  });\n  return container\n}\n\n// Mimic a KO change item 'add'\nfunction valueToChangeAddItem (value, index) {\n  return {\n    status: 'added',\n    value: value,\n    index: index\n  }\n}\n\n// store a symbol for caching the pending delete info index in the data item objects\nconst PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');\n\n// Extend the given context with a $index (passed in via the createChildContext)\nfunction extend$context (include$index, $context) {\n  if (include$index) { $context.$index = observable(); }\n  $context.$list = this.data;\n}\n\nclass ForEachBinding extends AsyncBindingHandler {\n  // NOTE: valid valueAccessors include:\n  //    []\n  //    observable([])\n  //    observableArray([])\n  //    computed\n  //    {data: array, name: string, as: string}\n\n  constructor (params) {\n    super(params);\n    const settings = {};\n    if (isPlainObject(this.value)) {\n      Object.assign(settings, this.value);\n    }\n\n    this.noIndex = settings.noIndex || this.allBindings.get('noIndex');\n    this.as = settings.as || this.allBindings.get('as');\n\n    this.data = settings.data || (unwrap(this.$context.$rawData) === this.value ? this.$context.$rawData : this.value);\n\n    this.container = virtualElements.isStartComment(this.$element)\n                     ? this.$element.parentNode : this.$element;\n    this.generateContext = this.createContextGenerator(this.as, !this.noIndex);\n    if (this.noIndex) { this.updateIndexes = false; }\n\n    this.templateNode = makeTemplateNode(\n      settings.templateNode || (settings.name\n        ? document.getElementById(settings.name).cloneNode(true)\n        : this.$element)\n    )\n\n    ;['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']\n      .forEach(p => { this[p] = settings[p] || this.allBindings.get(p); });\n\n    this.changeQueue = [];\n    this.firstLastNodesList = [];\n    this.indexesToDelete = [];\n    this.rendering_queued = false;\n    this.pendingDeletes = [];\n\n    // Expose the conditional so that if the `foreach` data is empty, successive\n    // 'else' bindings will appear.\n    this.isNotEmpty = observable(Boolean(unwrap(this.data).length));\n    domData.set(this.$element, 'conditional', {\n      elseChainSatisfied: this.isNotEmpty\n    });\n\n    // Remove existing content.\n    virtualElements.emptyNode(this.$element);\n\n    // Prime content\n    const primeData = unwrap(this.data);\n    if (primeData.map) {\n      this.onArrayChange(primeData.map(valueToChangeAddItem), true);\n    } else {\n      this.completeBinding();\n    }\n\n    // Watch for changes\n    if (isObservable(this.data)) {\n      if (!this.data.indexOf) {\n        // Make sure the observable is trackable.\n        this.data = this.data.extend({ trackArrayChanges: true });\n      }\n      this.changeSubs = this.data.subscribe(this.onArrayChange, this, 'arrayChange');\n    }\n  }\n\n  dispose () {\n    if (this.changeSubs) {\n      this.changeSubs.dispose();\n    }\n    this.flushPendingDeletes();\n  }\n\n  // If the array changes we register the change.\n  onArrayChange (changeSet, isInitial) {\n    var changeMap = {\n      added: [],\n      deleted: []\n    };\n\n    // knockout array change notification index handling:\n    // - sends the original array indexes for deletes\n    // - sends the new array indexes for adds\n    // - sorts them all by index in ascending order\n    // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked\n    for (var i = 0, len = changeSet.length; i < len; i++) {\n      if (changeMap.added.length && changeSet[i].status === 'added') {\n        var lastAdd = changeMap.added[changeMap.added.length - 1];\n        var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;\n        if (lastIndex + 1 === changeSet[i].index) {\n          if (!lastAdd.isBatch) {\n            // transform the last addition into a batch addition object\n            lastAdd = {\n              isBatch: true,\n              status: 'added',\n              index: lastAdd.index,\n              values: [lastAdd.value]\n            };\n            changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);\n          }\n          lastAdd.values.push(changeSet[i].value);\n          continue\n        }\n      }\n\n      changeMap[changeSet[i].status].push(changeSet[i]);\n    }\n\n    if (changeMap.deleted.length > 0) {\n      this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);\n      this.changeQueue.push({ status: 'clearDeletedIndexes' });\n    }\n\n    this.changeQueue.push.apply(this.changeQueue, changeMap.added);\n    // Once a change is registered, the ticking count-down starts for the processQueue.\n    if (this.changeQueue.length > 0 && !this.rendering_queued) {\n      this.rendering_queued = true;\n      if (isInitial) {\n        this.processQueue();\n      } else {\n        ForEachBinding.animateFrame.call(window, () => this.processQueue());\n      }\n    }\n  }\n\n  startQueueFlush () {\n    // Callback so folks can do things before the queue flush.\n    if (typeof this.beforeQueueFlush === 'function') {\n      this.beforeQueueFlush(this.changeQueue);\n    }\n  }\n\n  endQueueFlush () {\n    // Callback so folks can do things.\n    if (typeof this.afterQueueFlush === 'function') {\n      this.afterQueueFlush(this.changeQueue);\n    }\n  }\n\n  // Reflect all the changes in the queue in the DOM, then wipe the queue.\n  processQueue () {\n    var isEmpty = !unwrap(this.data).length;\n    var lowestIndexChanged = MAX_LIST_SIZE;\n\n    this.startQueueFlush();\n\n    arrayForEach(this.changeQueue, (changeItem) => {\n      if (typeof changeItem.index === 'number') {\n        lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);\n      }\n      this[changeItem.status](changeItem);\n    });\n    this.flushPendingDeletes();\n    this.rendering_queued = false;\n\n    // Update our indexes.\n    if (this.updateIndexes) { this.updateIndexes(lowestIndexChanged); }\n\n    this.endQueueFlush();\n    this.changeQueue = [];\n\n    // Update the conditional exposed on the domData\n    if (isEmpty !== !this.isNotEmpty()) {\n      this.isNotEmpty(!isEmpty);\n    }\n  }\n\n  /**\n   * Return a function that generates the context for a given node.\n   *\n   * We generate a single function that reduces our inner-loop calculations,\n   * which has a good chance of being optimized by the browser.\n   *\n   * @param  {string} as  The name given to each item in the list\n   * @param  {bool} index Whether to calculate indexes\n   * @return {function}   A function(dataValue) that returns the context\n   */\n  createContextGenerator (as, index) {\n    var $context = this.$context;\n    switch ((as && 1) | (index && 2)) {\n      case 0: // no-as & no-index\n        return function (v) {\n          return $context.createChildContext(v, null, extend$context.bind(this, false))\n        }\n\n      case 1: // as + no-index\n        return function (v) {\n          var obj = { $index: undefined, $list: this.data };\n          obj[as] = v;\n          return $context.extend(obj)\n        }\n\n      case 2: // no-as + index\n        return function (v) {\n          return $context.createChildContext(v, null, extend$context.bind(this, true))\n        }\n\n      case 3: // as + index\n        return function (v) {\n          var obj = { $index: observable(), $list: this.data };\n          obj[as] = v;\n          return $context.extend(obj)\n        }\n    }\n  }\n\n  // Process a changeItem with {status: 'added', ...}\n  added (changeItem) {\n    var index = changeItem.index;\n    var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];\n    var referenceElement = this.getLastNodeBeforeIndex(index);\n    // gather all childnodes for a possible batch insertion\n    const allChildNodes = [];\n    const asyncBindingResults = [];\n    var children;\n\n    for (var i = 0, len = valuesToAdd.length; i < len; ++i) {\n      // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset\n      var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);\n      if (pendingDelete && pendingDelete.nodesets.length) {\n        children = pendingDelete.nodesets.pop();\n      } else {\n        var templateClone = this.templateNode.cloneNode(true);\n        // Apply bindings first, and then process child nodes,\n        // because bindings can add childnodes.\n        const bindingResult = applyBindingsToDescendants(\n          this.generateContext(valuesToAdd[i]), templateClone\n        );\n\n        asyncBindingResults.push(bindingResult);\n\n        children = virtualElements.childNodes(templateClone);\n      }\n\n      // Note discussion at https://github.com/angular/angular.js/issues/7851\n      allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));\n      this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });\n    }\n\n    if (typeof this.afterAdd === 'function') {\n      this.afterAdd({\n        nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),\n        foreachInstance: this\n      });\n    } else {\n      this.insertAllAfter(allChildNodes, referenceElement);\n    }\n\n    this.completeBinding(options.Promise.all(asyncBindingResults));\n  }\n\n  getNodesForIndex (index) {\n    let result = [];\n    let ptr = this.firstLastNodesList[index].first;\n    let last = this.firstLastNodesList[index].last;\n    result.push(ptr);\n    while (ptr && ptr !== last) {\n      ptr = ptr.nextSibling;\n      result.push(ptr);\n    }\n    return result\n  }\n\n  getLastNodeBeforeIndex (index) {\n    if (index < 1 || index - 1 >= this.firstLastNodesList.length) { return null }\n    return this.firstLastNodesList[index - 1].last\n  }\n\n  /**\n   * Get the active (focused) node, if it's a child of the given node.\n   */\n  activeChildElement (node) {\n    var active = document.activeElement;\n    if (domNodeIsContainedBy(active, node)) {\n      return active\n    }\n  }\n\n  insertAllAfter (nodeOrNodeArrayToInsert, insertAfterNode) {\n    let frag;\n    let len;\n    let i;\n    let active = null;\n    let containerNode = this.$element;\n\n    // Poor man's node and array check.\n    if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {\n      throw new Error('Expected a single node or a node array')\n    }\n    if (nodeOrNodeArrayToInsert.nodeType !== undefined) {\n      active = this.activeChildElement(nodeOrNodeArrayToInsert);\n      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);\n      return [nodeOrNodeArrayToInsert]\n    } else if (nodeOrNodeArrayToInsert.length === 1) {\n      active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);\n      virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);\n    } else if (supportsDocumentFragment) {\n      frag = document.createDocumentFragment();\n      for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {\n        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n        frag.appendChild(nodeOrNodeArrayToInsert[i]);\n      }\n      virtualElements.insertAfter(containerNode, frag, insertAfterNode);\n    } else {\n      // Nodes are inserted in reverse order - pushed down immediately after\n      // the last node for the previous item or as the first node of element.\n      for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {\n        active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n        var child = nodeOrNodeArrayToInsert[i];\n        if (!child) { break }\n        virtualElements.insertAfter(containerNode, child, insertAfterNode);\n      }\n    }\n\n    if (active) { active.focus(); }\n\n    return nodeOrNodeArrayToInsert\n  }\n\n  // checks if the deleted data item should be handled with delay for a possible reuse at additions\n  shouldDelayDeletion (data) {\n    return data && (typeof data === 'object' || typeof data === 'function')\n  }\n\n  // gets the pending deletion info for this data item\n  getPendingDeleteFor (data) {\n    var index = data && data[PENDING_DELETE_INDEX_SYM];\n    if (index === undefined) return null\n    return this.pendingDeletes[index]\n  }\n\n  // tries to find the existing pending delete info for this data item, and if it can't, it registeres one\n  getOrCreatePendingDeleteFor (data) {\n    var pd = this.getPendingDeleteFor(data);\n    if (pd) {\n      return pd\n    }\n    pd = {\n      data: data,\n      nodesets: []\n    };\n    data[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;\n    this.pendingDeletes.push(pd);\n    return pd\n  }\n\n  // Process a changeItem with {status: 'deleted', ...}\n  deleted (changeItem) {\n    // if we should delay the deletion of this data, we add the nodeset to the pending delete info object\n    if (this.shouldDelayDeletion(changeItem.value)) {\n      let pd = this.getOrCreatePendingDeleteFor(changeItem.value);\n      pd.nodesets.push(this.getNodesForIndex(changeItem.index));\n    } else { // simple data, just remove the nodes\n      this.removeNodes(this.getNodesForIndex(changeItem.index));\n    }\n    this.indexesToDelete.push(changeItem.index);\n  }\n\n  // removes a set of nodes from the DOM\n  removeNodes (nodes) {\n    if (!nodes.length) { return }\n\n    function removeFn () {\n      var parent = nodes[0].parentNode;\n      for (var i = nodes.length - 1; i >= 0; --i) {\n        cleanNode(nodes[i]);\n        parent.removeChild(nodes[i]);\n      }\n    }\n\n    if (this.beforeRemove) {\n      var beforeRemoveReturn = this.beforeRemove({\n        nodesToRemove: nodes, foreachInstance: this\n      }) || {};\n      // If beforeRemove returns a `then`–able e.g. a Promise, we remove\n      // the nodes when that thenable completes.  We pass any errors to\n      // ko.onError.\n      if (typeof beforeRemoveReturn.then === 'function') {\n        beforeRemoveReturn.then(removeFn, options.onError);\n      }\n    } else {\n      removeFn();\n    }\n  }\n\n  // flushes the pending delete info store\n  // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up\n  // we also call it on dispose not to leave any mess\n  flushPendingDeletes () {\n    for (let i = 0, len = this.pendingDeletes.length; i !== len; ++i) {\n      var pd = this.pendingDeletes[i];\n      while (pd.nodesets.length) {\n        this.removeNodes(pd.nodesets.pop());\n      }\n      if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) { delete pd.data[PENDING_DELETE_INDEX_SYM]; }\n    }\n    this.pendingDeletes = [];\n  }\n\n  // We batch our deletion of item indexes in our parallel array.\n  // See brianmhunt/knockout-fast-foreach#6/#8\n  clearDeletedIndexes () {\n    // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine\n    // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.\n    for (let i = this.indexesToDelete.length - 1; i >= 0; --i) {\n      this.firstLastNodesList.splice(this.indexesToDelete[i], 1);\n    }\n    this.indexesToDelete = [];\n  }\n\n  updateIndexes (fromIndex) {\n    let ctx;\n    for (let i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {\n      ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);\n      if (ctx) { ctx.$index(i); }\n    }\n  }\n\n  getContextStartingFrom (node) {\n    let ctx;\n    while (node) {\n      ctx = contextFor(node);\n      if (ctx) { return ctx }\n      node = node.nextSibling;\n    }\n  }\n\n  /**\n   * Set whether the binding is always synchronous.\n   * Useful during testing.\n   */\n  static setSync (toggle) {\n    const w = options.global;\n    if (toggle) {\n      ForEachBinding.animateFrame = function (frame) { frame(); };\n    } else {\n      ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||\n        w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||\n        function (cb) { return w.setTimeout(cb, 1000 / 60) };\n    }\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n\n  /* TODO: Remove; for legacy/testing */\n  static get ForEach () { return this }\n  static get PENDING_DELETE_INDEX_SYM () { return PENDING_DELETE_INDEX_SYM }\n}\n\nvar bindings = {\n  foreach: ForEachBinding\n};\n\n// By default, foreach will be async.\nForEachBinding.setSync(false);\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.foreach.es6.js.map\n","import { options } from 'tko.utils';\n\nclass BindingHandlerObject {\n  set (nameOrObject, value) {\n    if (typeof nameOrObject === 'string') {\n      this[nameOrObject] = value;\n    } else if (typeof nameOrObject === 'object') {\n      if (value !== undefined) {\n        options.onError(\n          new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));\n      }\n      Object.assign(this, nameOrObject);\n    } else {\n      options.onError(\n        new Error('Given a bad binding handler type: ' + nameOrObject));\n    }\n  }\n\n  /**\n   * The handler may have a `.` in it, e.g. `attr.title`, in which case the\n   * handler is `attr`.  Otherwise it's the name given\n   */\n  get (nameOrDotted) {\n    const [name] = nameOrDotted.split('.');\n    return this[name]\n  }\n}\n\nclass Provider {\n  constructor (params = {}) {\n    if (this.constructor === Provider) {\n      throw new Error('Provider is an abstract base class.')\n    }\n    if (!('FOR_NODE_TYPES' in this)) {\n      // FOR_NODE_TYPES must return a list of integers corresponding to the\n      // node.nodeType's that the provider handles.\n      throw new Error('Providers must have FOR_NODE_TYPES property')\n    }\n    this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();\n    this.globals = params.globals || {};\n  }\n\n  nodeHasBindings (/* node */) {}\n  getBindingAccessors (/* node, context */) {}\n  preprocessNode (/* node */) {}\n  postProcess (/* node */) {}\n}\n\nexport { Provider };\n//# sourceMappingURL=tko.provider.es6.js.map\n","import { Parser, parseObjectLiteral } from 'tko.utils.parser';\nimport { Provider } from 'tko.provider';\n\n/**\n * BindingStringProvider is an abstract base class parses a binding string.\n *\n * Children must implement `nodeHasBindings` and `getBindingString`.\n */\nclass BindingStringProvider extends Provider {\n  /** Call bindingHandler.preprocess on each respective binding string.\n   *\n   * The `preprocess` property of bindingHandler must be a static\n   * function (i.e. on the object or constructor).\n   */\n  * processBinding (key, value) {\n    // Get the \"on\" binding from \"on.click\"\n    const [handlerName, property] = key.split('.');\n    const handler = this.bindingHandlers.get(handlerName);\n\n    if (handler && handler.preprocess) {\n      const bindingsAddedByHandler = [];\n      const chainFn = (...args) => bindingsAddedByHandler.push(args);\n      value = handler.preprocess(value, key, chainFn);\n      for (const [key, value] of bindingsAddedByHandler) {\n        yield * this.processBinding(key, value);\n      }\n    } else if (property) {\n      value = `{${property}:${value}}`;\n    }\n\n    yield `${handlerName}:${value}`;\n  }\n\n  * generateBindingString (bindingString) {\n    for (const {key, unknown, value} of parseObjectLiteral(bindingString)) {\n      yield * this.processBinding(key || unknown, value);\n    }\n  }\n\n  preProcessBindings (bindingString) {\n    return Array.from(this.generateBindingString(bindingString)).join(',')\n  }\n\n  getBindingAccessors (node, context) {\n    const bindingString = node && this.getBindingString(node);\n    if (!bindingString) { return }\n    const processed = this.preProcessBindings(bindingString);\n    return new Parser().parse(processed, context, this.globals, node)\n  }\n\n  getBindingString () { throw new Error('Overload getBindingString.') }\n}\n\nexport { BindingStringProvider };\n//# sourceMappingURL=tko.provider.bindingString.es6.js.map\n","import { virtualElements } from 'tko.utils';\nimport { BindingStringProvider } from 'tko.provider.bindingString';\n\nclass VirtualProvider extends BindingStringProvider {\n  get FOR_NODE_TYPES () { return [ 8 ] } // document.COMMENT_NODE\n\n  getBindingString (node) {\n    if (node.nodeType === document.COMMENT_NODE) {\n      return virtualElements.virtualNodeBindingValue(node)\n    }\n  }\n\n  nodeHasBindings (node) {\n    if (node.nodeType === document.COMMENT_NODE) {\n      return virtualElements.isStartComment(node)\n    }\n  }\n}\n\nexport { VirtualProvider };\n//# sourceMappingURL=tko.provider.virtual.es6.js.map\n","import { BindingStringProvider } from 'tko.provider.bindingString';\n\nclass DataBindProvider extends BindingStringProvider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  get BIND_ATTRIBUTE () {\n    return 'data-bind'\n  }\n\n  getBindingString (node) {\n    if (node.nodeType === document.ELEMENT_NODE) {\n      return node.getAttribute(this.BIND_ATTRIBUTE)\n    }\n  }\n\n  nodeHasBindings (node) {\n    if (node.nodeType === document.ELEMENT_NODE) {\n      return node.hasAttribute(this.BIND_ATTRIBUTE)\n    }\n  }\n}\n\nexport { DataBindProvider };\n//# sourceMappingURL=tko.provider.databind.es6.js.map\n","import { addDisposeCallback, createSymbolOrString } from 'tko.utils';\nimport { computed } from 'tko.computed';\n\n'use strict';\n\nconst SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');\nconst ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');\n\nclass LifeCycle {\n  // NOTE: For more advanced integration as an ES6 mixin, see e.g.:\n  // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/\n\n  /**\n   * Copy the properties of the LifeCycle class to the target (or its prototype)\n   *\n   * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.\n   */\n  static mixInto (Constructor) {\n    const target = Constructor.prototype || Constructor;\n    const mixin = LifeCycle.prototype;\n    for (let prop of Object.getOwnPropertyNames(mixin)) {\n      target[prop] = mixin[prop];\n    }\n  }\n\n  subscribe (observable, action) {\n    if (typeof action === 'string') { action = this[action].bind(this); }\n    this.addDisposable(observable.subscribe(action));\n  }\n\n  computed (params) {\n    if (typeof params === 'string') {\n      params = { read: this[params], write: this[params], owner: this };\n    } else if (typeof params === 'object') {\n      // Pass directly.\n    } else if (typeof params === 'function') {\n      params = { read: params, write: params };\n    } else {\n      throw new Error('LifeCycle::computed not given a valid type.')\n    }\n\n    params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];\n    return this.addDisposable(computed(params))\n  }\n\n  /**\n   * Add an event listener for the given or anchored node.\n   * @param {node} [node] (optional) The target node (otherwise the anchored node)\n   * @param {string} [type] Event type\n   * @param {function|string} [action] Either call the given function or `this[action]`\n   * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`\n   */\n  addEventListener (...args) {\n    const node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];\n    const [type, act, options] = args;\n    const handler = typeof act === 'string' ? this[act].bind(this) : act;\n    this.__addEventListener(node, type, handler, options);\n  }\n\n  __addEventListener (node, eventType, handler, options) {\n    node.addEventListener(eventType, handler, options);\n    function dispose () { node.removeEventListener(eventType, handler); }\n    addDisposeCallback(node, dispose);\n    this.addDisposable({ dispose });\n  }\n\n  anchorTo (node) {\n    addDisposeCallback(node, () => this.dispose());\n    this[ANCHOR_NODE] = node;\n  }\n\n  dispose () {\n    const subscriptions = this[SUBSCRIPTIONS] || [];\n    subscriptions.forEach(s => s.dispose());\n    this[SUBSCRIPTIONS] = [];\n    this[ANCHOR_NODE] = null;\n  }\n\n  addDisposable (subscription) {\n    const subscriptions = this[SUBSCRIPTIONS] || [];\n    if (!this[SUBSCRIPTIONS]) { this[SUBSCRIPTIONS] = subscriptions; }\n    if (typeof subscription.dispose !== 'function') {\n      throw new Error('Lifecycle::addDisposable argument missing `dispose`.')\n    }\n    subscriptions.push(subscription);\n    return subscription\n  }\n}\n\nexport { LifeCycle };\n//# sourceMappingURL=tko.lifecycle.es6.js.map\n","import { objectMap, tagNameLower } from 'tko.utils';\nimport registry from 'tko.utils.component';\nimport { isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed } from 'tko.computed';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\nclass ComponentProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  nodeHasBindings (node) {\n    return Boolean(this.getComponentNameForNode(node))\n  }\n\n  getBindingAccessors (node, context) {\n    const componentName = this.getComponentNameForNode(node);\n    if (!componentName) { return }\n    const component = () => ({\n      name: componentName,\n      params: this.getComponentParams(node, context)\n    });\n    return { component }\n  }\n\n  getComponentNameForNode (node) {\n    if (node.nodeType !== node.ELEMENT_NODE) { return }\n    const tagName = tagNameLower(node);\n    if (registry.isRegistered(tagName)) {\n      const hasDash = tagName.includes('-');\n      const isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';\n      if (hasDash || isUnknownEntity) { return tagName }\n    }\n  }\n\n  getComponentParams (node, context) {\n    const parser = new Parser(node, context, this.globals);\n    const paramsString = (node.getAttribute('params') || '').trim();\n    const accessors = parser.parse(paramsString, context, node);\n    if (!accessors || Object.keys(accessors).length === 0) {\n      return { $raw: {} }\n    }\n    const $raw = objectMap(accessors,\n      (value) => computed(value, null, { disposeWhenNodeIsRemoved: node })\n    );\n    const params = objectMap($raw, (v) => this.makeParamValue(node, v));\n    return Object.assign({ $raw }, params)\n  }\n\n  makeParamValue (node, paramValueComputed) {\n    const paramValue = paramValueComputed.peek();\n    // Does the evaluation of the parameter value unwrap any observables?\n    if (!paramValueComputed.isActive()) {\n      // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.\n      // Example: \"someVal: firstName, age: 123\" (whether or not firstName is an observable/computed)\n      return paramValue\n    }\n    // Yes it does. Supply a computed property that unwraps both the outer (binding expression)\n    // level of observability, and any inner (resulting model value) level of observability.\n    // This means the component doesn't have to worry about multiple unwrapping. If the value is a\n    // writable observable, the computed will also be writable and pass the value on to the observable.\n    const isWriteable = isWriteableObservable(paramValue);\n\n    return computed({\n      read: () => unwrap(paramValueComputed()),\n      write: isWriteable ? (v) => paramValueComputed()(v) : null,\n      disposeWhenNodeIsRemoved: node\n    })\n  }\n}\n\nexport { ComponentProvider };\n//# sourceMappingURL=tko.provider.component.es6.js.map\n","import { Provider } from 'tko.provider';\n\n/**\n * Convert attributes with ko-* to bindings.\n *\n * e.g.\n * <div ko-visible='value'></div>\n */\nclass AttrProvider extends Provider {\n  get FOR_NODE_TYPES () { return [ 1 ] } // document.ELEMENT_NODE\n\n  get PREFIX () { return 'ko-' }\n\n  getBindingAttributesList (node) {\n    if (!node.hasAttributes()) { return [] }\n    return Array.from(node.attributes)\n      .filter(attr => attr.name.startsWith(this.PREFIX))\n  }\n\n  nodeHasBindings (node) {\n    return this.getBindingAttributesList(node).length > 0\n  }\n\n  getBindingAccessors (node, context) {\n    return Object.assign({}, ...this.handlersFromAttributes(node, context))\n  }\n\n  * handlersFromAttributes (node, context) {\n    for (const attr of this.getBindingAttributesList(node)) {\n      const name = attr.name.substr(this.PREFIX.length);\n      yield {[name]: () => this.getValue(attr.value, context, node)};\n    }\n  }\n\n  getValue (token, $context, node) {\n    /* FIXME: This duplicates Identifier.prototype.lookup_value; it should\n       be refactored into e.g. a BindingContext method */\n    if (!token) { return }\n    const $data = $context.$data;\n\n    switch (token) {\n      case '$element': return node\n      case '$context': return $context\n      case 'this': case '$data': return $context.$data\n    }\n\n    if ($data instanceof Object && token in $data) { return $data[token] }\n    if (token in $context) { return $context[token] }\n    if (token in this.globals) { return this.globals[token] }\n\n    throw new Error(`The variable '${token} not found.`)\n  }\n}\n\nexport { AttrProvider as AttributeProvider };\n//# sourceMappingURL=tko.provider.attr.es6.js.map\n","import { Provider } from 'tko.provider';\n\nclass MultiProvider extends Provider {\n  get FOR_NODE_TYPES () { return this.nodeTypes }\n\n  constructor (params = {}) {\n    super(params);\n    const providers = params.providers || [];\n    this.nodeTypeMap = {};\n    this.nodeTypes = [];\n    this.providers = [];\n    providers.forEach(p => this.addProvider(p));\n  }\n\n  addProvider (provider) {\n    this.providers.push(provider);\n    provider.bindingHandlers = this.bindingHandlers;\n    provider.globals = this.globals;\n    const nodeTypeMap = this.nodeTypeMap;\n    for (const nodeType of provider.FOR_NODE_TYPES) {\n      if (!nodeTypeMap[nodeType]) { nodeTypeMap[nodeType] = []; }\n      nodeTypeMap[nodeType].push(provider);\n    }\n    this.nodeTypes = Object.keys(this.nodeTypeMap).map(k => parseInt(k, 10));\n  }\n\n  providersFor (node) {\n    return this.nodeTypeMap[node.nodeType] || []\n  }\n\n  nodeHasBindings (node) {\n    return this.providersFor(node).some(p => p.nodeHasBindings(node))\n  }\n\n  preprocessNode (node) {\n    for (const provider of this.providersFor(node)) {\n      const newNodes = provider.preprocessNode(node);\n      if (newNodes) { return newNodes }\n    }\n  }\n\n  * enumerateProviderBindings (node, ctx) {\n    for (const provider of this.providersFor(node)) {\n      const bindings = provider.getBindingAccessors(node, ctx) || {};\n      for (const [key, accessor] of Object.entries(bindings || {})) {\n        yield [key, accessor];\n      }\n    }\n  }\n\n  getBindingAccessors (node, ctx) {\n    node = this.preprocessNode(node) || node;\n    const bindings = {};\n    for (const [key, accessor] of this.enumerateProviderBindings(node, ctx)) {\n      if (key in bindings) {\n        throw new Error(`The binding \"${key}\" is duplicated by multiple providers`)\n      }\n      bindings[key] = accessor;\n    }\n    return bindings\n  }\n}\n\nexport { MultiProvider };\n//# sourceMappingURL=tko.provider.multi.es6.js.map\n","import { addOrRemoveItem, arrayFilter, arrayForEach, arrayGetDistinctValues, arrayIndexOf, arrayMap, arrayPushAll, createSymbolOrString, domData, ensureSelectElementIsRenderedCorrectly, ieVersion, makeArray, objectForEach, options, registerEventHandler, safeSetTimeout, setElementName, setHtml, setOptionNodeSelectionState, setTextContent, stringStartsWith, stringTrim, tagNameLower, toggleDomNodeCssClass, triggerEvent } from 'tko.utils';\nimport { dependencyDetection, isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed, pureComputed } from 'tko.computed';\nimport { applyBindingAccessorsToNode, applyBindingsToDescendants, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\n\nvar attr = {\n    update: function(element, valueAccessor, allBindings) {\n        var value = unwrap(valueAccessor()) || {};\n        objectForEach(value, function(attrName, attrValue) {\n            attrValue = unwrap(attrValue);\n\n            // Find the namespace of this attribute, if any.\n            // Defaulting to `null` should be ok, as\n            //\n            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )\n            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )\n            //\n            var prefixLen = attrName.indexOf(':');\n            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI( attrName.substr(0, prefixLen) );\n\n            // To cover cases like \"attr: { checked:someProp }\", we want to remove the attribute entirely\n            // when someProp is a \"no value\"-like value (strictly null, false, or undefined)\n            // (because the absence of the \"checked\" attr is how to mark an element as not checked, etc.)\n            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);\n\n            if (toRemove) {\n                element.removeAttributeNS(namespace, attrName);\n            } else {\n                element.setAttributeNS(namespace, attrName, attrValue.toString());\n            }\n\n            // Treat \"name\" specially - although you can think of it as an attribute, it also needs\n            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)\n            // Deliberately being case-sensitive here because XHTML would regard \"Name\" as a different thing\n            // entirely, and there's no strong reason to allow for such casing in HTML.\n            if (attrName === \"name\") {\n                setElementName(element, toRemove ? \"\" : attrValue.toString());\n            }\n        });\n    }\n};\n\nvar checked = {\n    after: ['value', 'attr'],\n    init: function (element, valueAccessor, allBindings) {\n        var checkedValue = pureComputed(function() {\n            // Treat \"value\" like \"checkedValue\" when it is included with \"checked\" binding\n            if (allBindings['has']('checkedValue')) {\n                return unwrap(allBindings.get('checkedValue'));\n            } else if (allBindings['has']('value')) {\n                return unwrap(allBindings.get('value'));\n            }\n\n            return element.value;\n        });\n\n        function updateModel() {\n            // This updates the model value from the view value.\n            // It runs in response to DOM events (click) and changes in checkedValue.\n            var isChecked = element.checked,\n                elemValue = useCheckedValue ? checkedValue() : isChecked;\n\n            // When we're first setting up this computed, don't change any model state.\n            if (dependencyDetection.isInitial()) {\n                return;\n            }\n\n            // We can ignore unchecked radio buttons, because some other radio\n            // button will be getting checked, and that one can take care of updating state.\n            if (isRadio && !isChecked) {\n                return;\n            }\n\n            var modelValue = dependencyDetection.ignore(valueAccessor);\n            if (valueIsArray) {\n                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;\n                if (oldElemValue !== elemValue) {\n                    // When we're responding to the checkedValue changing, and the element is\n                    // currently checked, replace the old elem value with the new elem value\n                    // in the model array.\n                    if (isChecked) {\n                        addOrRemoveItem(writableValue, elemValue, true);\n                        addOrRemoveItem(writableValue, oldElemValue, false);\n                    }\n\n                    oldElemValue = elemValue;\n                } else {\n                    // When we're responding to the user having checked/unchecked a checkbox,\n                    // add/remove the element value to the model array.\n                    addOrRemoveItem(writableValue, elemValue, isChecked);\n                }\n                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {\n                    modelValue(writableValue);\n                }\n            } else {\n                valueAccessor(elemValue, {onlyIfChanged: true});\n            }\n        }\n\n        function updateView() {\n            // This updates the view value from the model value.\n            // It runs in response to changes in the bound (checked) value.\n            var modelValue = unwrap(valueAccessor());\n\n            if (valueIsArray) {\n                // When a checkbox is bound to an array, being checked represents its value being present in that array\n                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;\n            } else if (isCheckbox) {\n                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish\n                element.checked = modelValue;\n            } else {\n                // For radio buttons, being checked means that the radio button's value corresponds to the model value\n                element.checked = (checkedValue() === modelValue);\n            }\n        }\n\n        var isCheckbox = element.type == \"checkbox\",\n            isRadio = element.type == \"radio\";\n\n        // Only bind to check boxes and radio buttons\n        if (!isCheckbox && !isRadio) {\n            return;\n        }\n\n        var rawValue = valueAccessor(),\n            valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array),\n            rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice),\n            oldElemValue = valueIsArray ? checkedValue() : undefined,\n            useCheckedValue = isRadio || valueIsArray;\n\n        // Set up two computeds to update the binding:\n\n        // The first responds to changes in the checkedValue value and to element clicks\n        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });\n        registerEventHandler(element, \"click\", updateModel);\n\n        // The second responds to changes in the model value (the one associated with the checked binding)\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n\n        rawValue = undefined;\n    }\n};\n\nvar checkedValue = {\n    update: function (element, valueAccessor) {\n        element.value = unwrap(valueAccessor());\n    }\n};\n\n// For certain common events (currently just 'click'), allow a simplified data-binding syntax\n// e.g. click:handler instead of the usual full-length event:{click:handler}\nfunction makeEventHandlerShortcut(eventName) {\n    return {\n        init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n            var newValueAccessor = function () {\n                var result = {};\n                result[eventName] = valueAccessor();\n                return result;\n            };\n            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);\n        }\n    };\n}\n\nvar eventHandler = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var eventsToHandle = valueAccessor() || {};\n        objectForEach(eventsToHandle, function(eventName) {\n            if (typeof eventName == \"string\") {\n                registerEventHandler(element, eventName, function (event) {\n                    var handlerReturnValue;\n                    var handlerFunction = valueAccessor()[eventName];\n                    if (!handlerFunction)\n                        return;\n\n                    try {\n                        // Take all the event args, and prefix with the viewmodel\n                        var argsForHandler = makeArray(arguments);\n                        viewModel = bindingContext['$data'];\n                        argsForHandler.unshift(viewModel);\n                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);\n                    } finally {\n                        if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\n                            if (event.preventDefault)\n                                event.preventDefault();\n                            else\n                                event.returnValue = false;\n                        }\n                    }\n\n                    var bubble = allBindings.get(eventName + 'Bubble') !== false;\n                    if (!bubble) {\n                        event.cancelBubble = true;\n                        if (event.stopPropagation)\n                            event.stopPropagation();\n                    }\n                });\n            }\n        });\n    }\n};\n\n\nvar onHandler = {\n    init: eventHandler.init,\n    preprocess: function (value, key, addBinding) {\n      addBinding(key.replace('on.', ''), '=>' + value);\n    }\n};\n\n// 'click' is just a shorthand for the usual full-length event:{click:handler}\nvar click = makeEventHandlerShortcut('click');\n\nvar css = {\n    aliases: ['class'],\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value !== null && typeof value == \"object\") {\n            objectForEach(value, function(className, shouldHaveClass) {\n                shouldHaveClass = unwrap(shouldHaveClass);\n                toggleDomNodeCssClass(element, className, shouldHaveClass);\n            });\n        } else {\n            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value\n            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);\n            element[css.classesWrittenByBindingKey] = value;\n            toggleDomNodeCssClass(element, value, true);\n        }\n    },\n    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')\n};\n\nvar enable = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value && element.disabled) {\n            element.removeAttribute(\"disabled\");\n        } else if ((!value) && (!element.disabled)) {\n            element.disabled = true;\n        }\n    }\n};\n\nvar disable = {\n    update: function (element, valueAccessor) {\n        enable.update(element, function() { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');\nvar hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');\n\nvar hasfocus = {\n    init: function(element, valueAccessor /*, allBindings */) {\n        var handleElementFocusChange = function(isFocused) {\n            // Where possible, ignore which event was raised and determine focus state using activeElement,\n            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.\n            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,\n            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus\n            // from calling 'blur()' on the element when it loses focus.\n            // Discussion at https://github.com/SteveSanderson/knockout/pull/352\n            element[hasfocusUpdatingProperty] = true;\n            var ownerDoc = element.ownerDocument;\n            if (\"activeElement\" in ownerDoc) {\n                var active;\n                try {\n                    active = ownerDoc.activeElement;\n                } catch(e) {\n                    // IE9 throws if you access activeElement during page load (see issue #703)\n                    active = ownerDoc.body;\n                }\n                isFocused = (active === element);\n            }\n            // var modelValue = valueAccessor();\n            valueAccessor(isFocused, {onlyIfChanged: true});\n\n            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function\n            element[hasfocusLastValue] = isFocused;\n            element[hasfocusUpdatingProperty] = false;\n        };\n        var handleElementFocusIn = handleElementFocusChange.bind(null, true);\n        var handleElementFocusOut = handleElementFocusChange.bind(null, false);\n\n        registerEventHandler(element, \"focus\", handleElementFocusIn);\n        registerEventHandler(element, \"focusin\", handleElementFocusIn); // For IE\n        registerEventHandler(element, \"blur\",  handleElementFocusOut);\n        registerEventHandler(element, \"focusout\",  handleElementFocusOut); // For IE\n    },\n    update: function(element, valueAccessor) {\n        var value = !!unwrap(valueAccessor());\n\n        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {\n            value ? element.focus() : element.blur();\n\n            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).\n            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current\n            // element was focused already.\n            if (!value && element[hasfocusLastValue]) {\n                element.ownerDocument.body.focus();\n            }\n\n            // For IE, which doesn't reliably fire \"focus\" or \"blur\" events synchronously\n            dependencyDetection.ignore(triggerEvent, null, [element, value ? \"focusin\" : \"focusout\"]);\n        }\n    }\n};\n\nvar html = {\n    init: function() {\n        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)\n        return {\n            'controlsDescendantBindings': true\n        };\n    },\n    //\n    // Modify internal, per ko.punches and :\n    //      http://stackoverflow.com/a/15348139\n    update: function(element, valueAccessor) {\n        setHtml(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar $let = {\n    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n        // Make a modified binding context, with extra properties, and apply it to descendant elements\n        var innerContext = bindingContext['extend'](valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n\n        return { 'controlsDescendantBindings': true };\n    },\n    allowVirtualElements: true\n};\n\nvar hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';\n\n// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values\n// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values\n// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.\nvar selectExtensions = {\n    optionsValueDomDataKey: undefined,\n\n    readValue : function(element) {\n        switch (tagNameLower(element)) {\n        case 'option':\n            if (element[hasDomDataExpandoProperty] === true)\n                return domData.get(element, selectExtensions.optionValueDomDataKey);\n            return element.value;\n        case 'select':\n            return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;\n        default:\n            return element.value;\n        }\n    },\n\n    writeValue: function(element, value, allowUnset) {\n        switch (tagNameLower(element)) {\n        case 'option':\n            switch(typeof value) {\n            case \"string\":\n                domData.set(element, selectExtensions.optionValueDomDataKey, undefined);\n                if (hasDomDataExpandoProperty in element) { // IE <= 8 throws errors if you delete non-existent properties from a DOM node\n                    delete element[hasDomDataExpandoProperty];\n                }\n                element.value = value;\n                break;\n            default:\n                // Store arbitrary object using DomData\n                domData.set(element, selectExtensions.optionValueDomDataKey, value);\n                element[hasDomDataExpandoProperty] = true;\n\n                // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.\n                element.value = typeof value === \"number\" ? value : \"\";\n                break;\n            }\n            break;\n        case 'select':\n            if (value === \"\" || value === null)       // A blank string or null value will select the caption\n                value = undefined;\n            var selection = -1;\n            for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {\n                optionValue = selectExtensions.readValue(element.options[i]);\n                // Include special check to handle selecting a caption with a blank string value\n                if (optionValue == value || (optionValue === \"\" && value === undefined)) {\n                    selection = i;\n                    break;\n                }\n            }\n            if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {\n                element.selectedIndex = selection;\n            }\n            break;\n        default:\n            if ((value === null) || (value === undefined))\n                value = \"\";\n            element.value = value;\n            break;\n        }\n    }\n};\n\nvar captionPlaceholder = {};\n\nvar options$1 = {\n    init: function(element) {\n        if (tagNameLower(element) !== \"select\")\n            throw new Error(\"options binding applies only to SELECT elements\");\n\n        // Remove all existing <option>s.\n        while (element.length > 0) {\n            element.remove(0);\n        }\n\n        // Ensures that the binding processor doesn't try to bind the options\n        return { 'controlsDescendantBindings': true };\n    },\n    update: function (element, valueAccessor, allBindings) {\n        function selectedOptions() {\n            return arrayFilter(element.options, function (node) { return node.selected; });\n        }\n\n        var selectWasPreviouslyEmpty = element.length == 0,\n            multiple = element.multiple,\n            previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null,\n            unwrappedArray = unwrap(valueAccessor()),\n            valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'),\n            includeDestroyed = allBindings.get('optionsIncludeDestroyed'),\n            arrayToDomNodeChildrenOptions = {},\n            captionValue,\n            filteredArray,\n            previousSelectedValues = [];\n\n        if (!valueAllowUnset) {\n            if (multiple) {\n                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);\n            } else if (element.selectedIndex >= 0) {\n                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));\n            }\n        }\n\n        if (unwrappedArray) {\n            if (typeof unwrappedArray.length == \"undefined\") // Coerce single value into array\n                unwrappedArray = [unwrappedArray];\n\n            // Filter out any entries marked as destroyed\n            filteredArray = arrayFilter(unwrappedArray, function(item) {\n                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);\n            });\n\n            // If caption is included, add it to the array\n            if (allBindings['has']('optionsCaption')) {\n                captionValue = unwrap(allBindings.get('optionsCaption'));\n                // If caption value is null or undefined, don't show a caption\n                if (captionValue !== null && captionValue !== undefined) {\n                    filteredArray.unshift(captionPlaceholder);\n                }\n            }\n        } else {\n            // If a falsy value is provided (e.g. null), we'll simply empty the select element\n        }\n\n        function applyToObject(object, predicate, defaultValue) {\n            var predicateType = typeof predicate;\n            if (predicateType == \"function\")    // Given a function; run it against the data value\n                return predicate(object);\n            else if (predicateType == \"string\") // Given a string; treat it as a property name on the data value\n                return object[predicate];\n            else                                // Given no optionsText arg; use the data value itself\n                return defaultValue;\n        }\n\n        // The following functions can run at two different times:\n        // The first is when the whole array is being updated directly from this binding handler.\n        // The second is when an observable value for a specific array entry is updated.\n        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.\n        var itemUpdate = false;\n        function optionForArrayItem(arrayEntry, index, oldOptions) {\n            if (oldOptions.length) {\n                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [ selectExtensions.readValue(oldOptions[0]) ] : [];\n                itemUpdate = true;\n            }\n            var option = element.ownerDocument.createElement(\"option\");\n            if (arrayEntry === captionPlaceholder) {\n                setTextContent(option, allBindings.get('optionsCaption'));\n                selectExtensions.writeValue(option, undefined);\n            } else {\n                // Apply a value to the option element\n                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);\n                selectExtensions.writeValue(option, unwrap(optionValue));\n\n                // Apply some text to the option element\n                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);\n                setTextContent(option, optionText);\n            }\n            return [option];\n        }\n\n        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection\n        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208\n        arrayToDomNodeChildrenOptions['beforeRemove'] =\n            function (option) {\n                element.removeChild(option);\n            };\n\n        function setSelectionCallback(arrayEntry, newOptions) {\n            if (itemUpdate && valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            } else if (previousSelectedValues.length) {\n                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.\n                // That's why we first added them without selection. Now it's time to set the selection.\n                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;\n                setOptionNodeSelectionState(newOptions[0], isSelected);\n\n                // If this option was changed from being selected during a single-item update, notify the change\n                if (itemUpdate && !isSelected) {\n                    dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                }\n            }\n        }\n\n        var callback = setSelectionCallback;\n        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == \"function\") {\n            callback = function(arrayEntry, newOptions) {\n                setSelectionCallback(arrayEntry, newOptions);\n                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);\n            };\n        }\n\n        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);\n\n        dependencyDetection.ignore(function () {\n            if (valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            } else {\n                // Determine if the selection has changed as a result of updating the options list\n                var selectionChanged;\n                if (multiple) {\n                    // For a multiple-select box, compare the new selection count to the previous one\n                    // But if nothing was selected before, the selection can't have changed\n                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;\n                } else {\n                    // For a single-select box, compare the current value to the previous value\n                    // But if nothing was selected before or nothing is selected now, just look for a change in selection\n                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)\n                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])\n                        : (previousSelectedValues.length || element.selectedIndex >= 0);\n                }\n\n                // Ensure consistency between model value and selected option.\n                // If the dropdown was changed so that selection is no longer the same,\n                // notify the value or selectedOptions binding.\n                if (selectionChanged) {\n                    triggerEvent(element, \"change\");\n                }\n            }\n        });\n\n        // Workaround for IE bug\n        ensureSelectElementIsRenderedCorrectly(element);\n\n        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)\n            element.scrollTop = previousScrollTop;\n    }\n};\n\nselectExtensions.optionValueDomDataKey = domData.nextKey();\n\nvar selectedOptions = {\n    after: ['options', 'foreach'],\n\n    init: function (element, valueAccessor, allBindings) {\n        registerEventHandler(element, \"change\", function () {\n            var value = valueAccessor(), valueToWrite = [];\n            arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\n                if (node.selected)\n                    valueToWrite.push(selectExtensions.readValue(node));\n            });\n            valueAccessor(valueToWrite);\n        });\n    },\n\n    update: function (element, valueAccessor) {\n        if (tagNameLower(element) != \"select\")\n            throw new Error(\"values binding applies only to SELECT elements\");\n\n        var newValue = unwrap(valueAccessor()),\n            previousScrollTop = element.scrollTop;\n\n        if (newValue && typeof newValue.length == \"number\") {\n            arrayForEach(element.getElementsByTagName(\"option\"), function(node) {\n                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;\n                if (node.selected != isSelected) {      // This check prevents flashing of the select element in IE\n                    setOptionNodeSelectionState(node, isSelected);\n                }\n            });\n        }\n\n        element.scrollTop = previousScrollTop;\n    }\n};\n\nvar style = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor() || {});\n        objectForEach(value, function(styleName, styleValue) {\n            styleValue = unwrap(styleValue);\n\n            if (styleValue === null || styleValue === undefined || styleValue === false) {\n                // Empty string removes the value, whereas null/undefined have no effect\n                styleValue = \"\";\n            }\n\n            element.style[styleName] = styleValue;\n        });\n    }\n};\n\nvar submit = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        if (typeof valueAccessor() != \"function\")\n            throw new Error(\"The value for a submit binding must be a function\");\n        registerEventHandler(element, \"submit\", function (event) {\n            var handlerReturnValue;\n            var value = valueAccessor();\n            try { handlerReturnValue = value.call(bindingContext['$data'], element); }\n            finally {\n                if (handlerReturnValue !== true) { // Normally we want to prevent default action. Developer can override this be explicitly returning true.\n                    if (event.preventDefault)\n                        event.preventDefault();\n                    else\n                        event.returnValue = false;\n                }\n            }\n        });\n    }\n};\n\nvar text = {\n    init: function() {\n        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).\n        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.\n        return { controlsDescendantBindings: true };\n    },\n    update: function (element, valueAccessor) {\n        setTextContent(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar parseVersion;\nvar operaVersion;\nvar userAgent;\nvar safariVersion;\nvar firefoxVersion;\nvar w = options.global;\n\nif (w.navigator) {\n    parseVersion = function (matches) {\n        if (matches) {\n            return parseFloat(matches[1]);\n        }\n    };\n\n    // Detect various browser versions because some old versions don't fully support the 'input' event\n    operaVersion = w.opera && w.opera.version && parseInt(w.opera.version()),\n        userAgent = w.navigator.userAgent,\n        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\\/([^ ]*) safari/i)),\n        firefoxVersion = parseVersion(userAgent.match(/Firefox\\/([^ ]*)/));\n}\n\n// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.\n// But it does fire the 'selectionchange' event on many of those, presumably because the\n// cursor is moving and that counts as the selection changing. The 'selectionchange' event is\n// fired at the document level only and doesn't directly indicate which element changed. We\n// set up just one event handler for the document and use 'activeElement' to determine which\n// element was changed.\nif (ieVersion < 10) {\n    var selectionChangeRegisteredName = domData.nextKey(),\n        selectionChangeHandlerName = domData.nextKey();\n    var selectionChangeHandler = function(event) {\n        var target = this.activeElement,\n            handler = target && domData.get(target, selectionChangeHandlerName);\n        if (handler) {\n            handler(event);\n        }\n    };\n    var registerForSelectionChangeEvent = function (element, handler) {\n        var ownerDoc = element.ownerDocument;\n        if (!domData.get(ownerDoc, selectionChangeRegisteredName)) {\n            domData.set(ownerDoc, selectionChangeRegisteredName, true);\n            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);\n        }\n        domData.set(element, selectionChangeHandlerName, handler);\n    };\n}\n\nvar textInput = {\n    aliases: 'textinput',\n    init: function (element, valueAccessor) {\n\n        var previousElementValue = element.value,\n            timeoutHandle,\n            elementValueBeforeEvent;\n\n        var updateModel = function (event) {\n            clearTimeout(timeoutHandle);\n            elementValueBeforeEvent = timeoutHandle = undefined;\n\n            var elementValue = element.value;\n            if (previousElementValue !== elementValue) {\n                // Provide a way for tests to know exactly which event was processed\n                if (options.debug && event) element['_ko_textInputProcessedEvent'] = event.type;\n                previousElementValue = elementValue;\n                valueAccessor(elementValue);\n            }\n        };\n\n        var deferUpdateModel = function (event) {\n            if (!timeoutHandle) {\n                // The elementValueBeforeEvent variable is set *only* during the brief gap between an\n                // event firing and the updateModel function running. This allows us to ignore model\n                // updates that are from the previous state of the element, usually due to techniques\n                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.\n                elementValueBeforeEvent = element.value;\n                var handler = options.debug ? updateModel.bind(element, {type: event.type}) : updateModel;\n                timeoutHandle = safeSetTimeout(handler, 4);\n            }\n        };\n\n        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);\n        // so we'll make sure all updates are asynchronous\n        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;\n\n        var updateView = function () {\n            var modelValue = unwrap(valueAccessor());\n\n            if (modelValue === null || modelValue === undefined) {\n                modelValue = '';\n            }\n\n            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateView, 4);\n                return;\n            }\n\n            // Update the element only if the element and model are different. On some browsers, updating the value\n            // will move the cursor to the end of the input, which would be bad while the user is typing.\n            if (element.value !== modelValue) {\n                previousElementValue = modelValue;  // Make sure we ignore events (propertychange) that result from updating the value\n                element.value = modelValue;\n            }\n        };\n\n        var onEvent = function (event, handler) {\n            registerEventHandler(element, event, handler);\n        };\n\n        if (options.debug && textInput._forceUpdateOn) {\n            // Provide a way for tests to specify exactly which events are bound\n            arrayForEach(textInput._forceUpdateOn, function(eventName) {\n                if (eventName.slice(0,5) == 'after') {\n                    onEvent(eventName.slice(5), deferUpdateModel);\n                } else {\n                    onEvent(eventName, updateModel);\n                }\n            });\n        } else {\n            if (ieVersion < 10) {\n                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever\n                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,\n                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it\n                // when using autocomplete, we'll use 'propertychange' for it also.\n                onEvent('propertychange', function(event) {\n                    if (event.propertyName === 'value') {\n                        ieUpdateModel(event);\n                    }\n                });\n\n                if (ieVersion == 8) {\n                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from\n                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following\n                    // events too.\n                    onEvent('keyup', updateModel);      // A single keystoke\n                    onEvent('keydown', updateModel);    // The first character when a key is held down\n                }\n                if (ieVersion >= 8) {\n                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using\n                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text\n                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'\n                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.\n                    // These are also needed in IE8 because of the bug described above.\n                    registerForSelectionChangeEvent(element, ieUpdateModel);  // 'selectionchange' covers cut, paste, drop, delete, etc.\n                    onEvent('dragend', deferUpdateModel);\n                }\n            } else {\n                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed\n                // through the user interface.\n                onEvent('input', updateModel);\n\n                if (safariVersion < 5 && tagNameLower(element) === \"textarea\") {\n                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'\n                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.\n                    onEvent('keydown', deferUpdateModel);\n                    onEvent('paste', deferUpdateModel);\n                    onEvent('cut', deferUpdateModel);\n                } else if (operaVersion < 11) {\n                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.\n                    // We can try to catch some of those using 'keydown'.\n                    onEvent('keydown', deferUpdateModel);\n                } else if (firefoxVersion < 4.0) {\n                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete\n                    onEvent('DOMAutoComplete', updateModel);\n\n                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.\n                    onEvent('dragdrop', updateModel);       // <3.5\n                    onEvent('drop', updateModel);           // 3.5\n                }\n            }\n        }\n\n        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.\n        onEvent('change', updateModel);\n\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\n// // textinput is an alias for textInput\n// ko.bindingHandlers['textinput'] = {\n//     // preprocess is the only way to set up a full alias\n//     'preprocess': function (value, name, addBinding) {\n//         addBinding('textInput', value);\n//     }\n// };\n\nvar uniqueName = {\n    init: function (element, valueAccessor) {\n        if (valueAccessor()) {\n            var name = \"ko_unique_\" + (++uniqueName.currentIndex);\n            setElementName(element, name);\n        }\n    },\n    currentIndex: 0\n};\n\nvar value = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit\n        if (element.tagName.toLowerCase() == \"input\" && (element.type == \"checkbox\" || element.type == \"radio\")) {\n            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });\n            return;\n        }\n\n        // Always catch \"change\" event; possibly other events too if asked\n        var eventsToCatch = [\"change\"];\n        var requestedEventsToCatch = allBindings.get(\"valueUpdate\");\n        var propertyChangedFired = false;\n        var elementValueBeforeEvent = null;\n\n        if (requestedEventsToCatch) {\n            if (typeof requestedEventsToCatch == \"string\") // Allow both individual event names, and arrays of event names\n                requestedEventsToCatch = [requestedEventsToCatch];\n            arrayPushAll(eventsToCatch, requestedEventsToCatch);\n            eventsToCatch = arrayGetDistinctValues(eventsToCatch);\n        }\n\n        var valueUpdateHandler = function() {\n            elementValueBeforeEvent = null;\n            propertyChangedFired = false;\n            var modelValue = valueAccessor();\n            var elementValue = selectExtensions.readValue(element);\n            valueAccessor(elementValue);\n        };\n\n        // Workaround for https://github.com/SteveSanderson/knockout/issues/122\n        // IE doesn't fire \"change\" events on textboxes if the user selects a value from its autocomplete list\n        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == \"input\" && element.type == \"text\"\n                                       && element.autocomplete != \"off\" && (!element.form || element.form.autocomplete != \"off\");\n        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, \"propertychange\") == -1) {\n            registerEventHandler(element, \"propertychange\", function () { propertyChangedFired = true; });\n            registerEventHandler(element, \"focus\", function () { propertyChangedFired = false; });\n            registerEventHandler(element, \"blur\", function() {\n                if (propertyChangedFired) {\n                    valueUpdateHandler();\n                }\n            });\n        }\n\n        arrayForEach(eventsToCatch, function(eventName) {\n            // The syntax \"after<eventname>\" means \"run the handler asynchronously after the event\"\n            // This is useful, for example, to catch \"keydown\" events after the browser has updated the control\n            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)\n            var handler = valueUpdateHandler;\n            if (stringStartsWith(eventName, \"after\")) {\n                handler = function() {\n                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between\n                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen\n                    // at the earliest asynchronous opportunity. We store this temporary information so that\n                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,\n                    // we can overwrite that model value change with the value the user just typed. Otherwise,\n                    // techniques like rateLimit can trigger model changes at critical moments that will\n                    // override the user's inputs, causing keystrokes to be lost.\n                    elementValueBeforeEvent = selectExtensions.readValue(element);\n                    safeSetTimeout(valueUpdateHandler, 0);\n                };\n                eventName = eventName.substring(\"after\".length);\n            }\n            registerEventHandler(element, eventName, handler);\n        });\n\n        var updateFromModel = function () {\n            var newValue = unwrap(valueAccessor());\n            var elementValue = selectExtensions.readValue(element);\n\n            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateFromModel, 0);\n                return;\n            }\n\n            var valueHasChanged = (newValue !== elementValue);\n\n            if (valueHasChanged) {\n                if (tagNameLower(element) === \"select\") {\n                    var allowUnset = allBindings.get('valueAllowUnset');\n                    var applyValueAction = function () {\n                        selectExtensions.writeValue(element, newValue, allowUnset);\n                    };\n                    applyValueAction();\n\n                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {\n                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,\n                        // because you're not allowed to have a model value that disagrees with a visible UI selection.\n                        dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                    } else {\n                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread\n                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread\n                        // to apply the value as well.\n                        safeSetTimeout(applyValueAction, 0);\n                    }\n                } else {\n                    selectExtensions.writeValue(element, newValue);\n                }\n            }\n        };\n\n        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\nvar visible = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        var isCurrentlyVisible = !(element.style.display == \"none\");\n        if (value && !isCurrentlyVisible)\n            element.style.display = \"\";\n        else if ((!value) && isCurrentlyVisible)\n            element.style.display = \"none\";\n    }\n};\n\nvar hidden = {\n    update: function (element, valueAccessor) {\n        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar using = {\n    init: function(element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var innerContext = bindingContext.createChildContext(valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { controlsDescendantBindings: true };\n    },\n    allowVirtualElements: true\n};\n\nvar bindings = {\n    attr: attr,\n    checked: checked,\n    checkedValue: checkedValue,\n    click: click,\n    css: css, 'class': css,\n    enable: enable,\n    'event': eventHandler,\n    disable: disable,\n    hasfocus: hasfocus, hasFocus: hasfocus,\n    hidden: hidden,\n    html: html,\n    'let': $let,\n    on: onHandler,\n    options: options$1,\n    selectedOptions: selectedOptions,\n    style: style,\n    submit: submit,\n    text: text,\n    textInput: textInput,\n    textinput: textInput,\n    uniqueName: uniqueName,\n    using: using,\n    value: value,\n    visible: visible\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.core.es6.js.map\n","import { toJS, unwrap } from 'tko.observable';\n\nvar sproto = String.prototype;\n\nvar filters = {};\n\n// Convert value to uppercase\nfilters.uppercase = function(value) {\n    return sproto.toUpperCase.call(unwrap(value));\n};\n\n// Convert value to lowercase\nfilters.lowercase = function(value) {\n    return sproto.toLowerCase.call(unwrap(value));\n};\n\n// Return default value if the input value is empty or null\nfilters['default'] = function (value, defaultValue) {\n    value = unwrap(value);\n    if (typeof value === \"function\") {\n        return value;\n    }\n    if (typeof value === \"string\") {\n        return sproto.trim.call(value) === '' ? defaultValue : value;\n    }\n    return value == null || value.length == 0 ? defaultValue : value;\n};\n\n// Return the value with the search string replaced with the replacement string\nfilters.replace = function(value, search, replace) {\n    return sproto.replace.call(unwrap(value), search, replace);\n};\n\nfilters.fit = function(value, length, replacement, trimWhere) {\n    value = unwrap(value);\n    if (length && ('' + value).length > length) {\n        replacement = '' + (replacement || '...');\n        length = length - replacement.length;\n        value = '' + value;\n        switch (trimWhere) {\n            case 'left':\n                return replacement + value.slice(-length);\n            case 'middle':\n                var leftLen = Math.ceil(length / 2);\n                return value.substr(0, leftLen) + replacement + value.slice(leftLen-length);\n            default:\n                return value.substr(0, length) + replacement;\n        }\n    } else {\n        return value;\n    }\n};\n\n// Convert a model object to JSON\nfilters.json = function(rootObject, space, replacer) {\n       // replacer and space are optional\n    return JSON.stringify(toJS(rootObject), replacer, space);\n};\n\n// Format a number using the browser's toLocaleString\nfilters.number = function(value) {\n    return (+unwrap(value)).toLocaleString();\n};\n\nexport { filters };\n//# sourceMappingURL=tko.filter.punches.es6.js.map\n","import { cloneNodes, makeArray, virtualElements } from 'tko.utils';\nimport { unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\nimport { LifeCycle } from 'tko.lifecycle';\nimport registry from 'tko.utils.component';\n\n//\n// Binding Handler for Components\n//\n\nvar componentLoadingOperationUniqueId = 0;\n\nclass ComponentBinding extends AsyncBindingHandler {\n  constructor (params) {\n    super(params);\n    this.originalChildNodes = makeArray(\n      virtualElements.childNodes(this.$element)\n    );\n    this.computed('computeApplyComponent');\n  }\n\n  cloneTemplateIntoElement (componentName, componentDefinition, element) {\n    const template = componentDefinition['template'];\n    if (!template) {\n      throw new Error('Component \\'' + componentName + '\\' has no template')\n    }\n    const clonedNodesArray = cloneNodes(template);\n    virtualElements.setDomNodeChildren(element, clonedNodesArray);\n  }\n\n  createViewModel (componentDefinition, element, originalChildNodes, componentParams) {\n    const componentViewModelFactory = componentDefinition.createViewModel;\n    return componentViewModelFactory\n      ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })\n      : componentParams // Template-only component\n  }\n\n  computeApplyComponent () {\n    const value = unwrap(this.value);\n    let componentName;\n    let componentParams;\n\n    if (typeof value === 'string') {\n      componentName = value;\n    } else {\n      componentName = unwrap(value['name']);\n      componentParams = unwrap(value['params']);\n    }\n\n    this.latestComponentName = componentName;\n\n    if (!componentName) {\n      throw new Error('No component name specified')\n    }\n\n    this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;\n    registry.get(componentName, (defn) => this.applyComponentDefinition(componentName, componentParams, defn));\n  }\n\n  applyComponentDefinition (componentName, componentParams, componentDefinition) {\n    // If this is not the current load operation for this element, ignore it.\n    if (this.currentLoadingOperationId !== this.loadingOperationId ||\n        this.latestComponentName !== componentName) { return }\n\n    // Clean up previous state\n    this.cleanUpState();\n\n    const element = this.$element;\n\n    // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.\n    if (!componentDefinition) {\n      throw new Error('Unknown component \\'' + componentName + '\\'')\n    }\n    this.cloneTemplateIntoElement(componentName, componentDefinition, element);\n\n    const componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);\n\n    if (componentViewModel instanceof LifeCycle) {\n      componentViewModel.anchorTo(this.$element);\n    }\n\n    const ctxExtender = (ctx) => Object.assign(ctx, {\n      $component: componentViewModel,\n      $componentTemplateNodes: this.originalChildNodes\n    });\n\n    const childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);\n    this.currentViewModel = componentViewModel;\n\n    applyBindingsToDescendants(childBindingContext, this.$element)\n      .then(this.completeBinding);\n  }\n\n  cleanUpState () {\n    const currentView = this.currentViewModel;\n    const currentViewDispose = currentView && currentView.dispose;\n    if (typeof currentViewDispose === 'function') {\n      currentViewDispose.call(currentView);\n    }\n    this.currentViewModel = null;\n    // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion\n    this.currentLoadingOperationId = null;\n  }\n\n  dispose () {\n    this.cleanUpState();\n    super.dispose();\n  }\n\n  get controlsDescendants () { return true }\n  static get allowVirtualElements () { return true }\n}\n\nvar bindings = { component: ComponentBinding };\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.component.es6.js.map\n","/* eslint semi: 0 */\nimport * as utils from 'tko.utils'\n\nimport {\n    // applyExtenders,\n    // arrayChangeEventName,\n    // deferUpdates,\n    dependencyDetection,\n    extenders,\n    isObservable,\n    isSubscribable,\n    isWriteableObservable,\n    observable,\n    observableArray,\n    peek,\n    subscribable,\n    toJS,\n    toJSON,\n    unwrap\n} from 'tko.observable'\n\nimport {\n    computed,\n    isComputed,\n    isPureComputed,\n    pureComputed\n} from 'tko.computed'\n\nimport { VirtualProvider } from 'tko.provider.virtual'\nimport { DataBindProvider } from 'tko.provider.databind'\nimport { ComponentProvider } from 'tko.provider.component'\nimport { AttributeProvider } from 'tko.provider.attr'\nimport { MultiProvider } from 'tko.provider.multi'\nimport {\n  TextMustacheProvider, AttributeMustacheProvider\n} from 'tko.provider.mustache'\n\nimport {\n    applyBindingAccessorsToNode,\n    applyBindings,\n    applyBindingsToDescendants,\n    applyBindingsToNode,\n    contextFor,\n    dataFor,\n    getBindingHandler,\n    BindingHandler,\n    AsyncBindingHandler,\n    setDomNodeChildrenFromArrayMapping\n} from 'tko.bind';\n\nimport {\n    bindings as coreBindings\n} from 'tko.binding.core';\n\nimport {\n    anonymousTemplate,\n    bindings as templateBindings,\n    domElement,\n    nativeTemplateEngine,\n    renderTemplate,\n    setTemplateEngine,\n    templateEngine\n    // templateSources\n} from 'tko.binding.template';\n\nimport {\n    bindings as ifBindings\n} from 'tko.binding.if';\n\nimport {\n    bindings as foreachBindings\n} from 'tko.binding.foreach';\n\nimport {\n  filters as punchesFilters\n} from 'tko.filter.punches';\n\nimport {\n  bindings as componentBindings\n} from 'tko.binding.component'\n\nimport components from 'tko.utils.component'\n\nvar coreUtils = {}\n\nutils.arrayForEach([\n  'extend',\n  'setTimeout',\n  'arrayForEach',\n  'arrayFirst',\n  'arrayFilter',\n  'arrayGetDistinctValues',\n  'arrayIndexOf',\n  'arrayMap',\n  'arrayPushAll',\n  'arrayRemoveItem',\n  'getFormFields',\n  'peekObservable',\n  'postJson',\n  'parseJson',\n  'registerEventHandler',\n  'stringifyJson',\n  'range',\n  'toggleDomNodeCssClass',\n  'triggerEvent',\n  'unwrapObservable',\n  'objectForEach',\n  'addOrRemoveItem',\n  'setTextContent',\n  'domData',\n  'parseHtmlFragment',\n  'setHtml',\n  'compareArrays',\n  'setDomNodeChildrenFromArrayMapping'\n], function (coreUtil) {\n  coreUtils[coreUtil] = utils[coreUtil]\n})\n\ncoreUtils.domNodeDisposal = {\n  addDisposeCallback: utils.addDisposeCallback,\n  otherNodeCleanerFunctions: utils.otherNodeCleanerFunctions,\n  removeDisposeCallback: utils.removeDisposeCallback,\n  removeNode: utils.removeNode\n}\n\nutils.extend(coreUtils, {\n  setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,\n  unwrapObservable: unwrap,\n  peekObservable: peek\n})\n\n// Create the binding provider and default bindings.\nconst provider = new MultiProvider({\n  globals: utils.options.bindingGlobals,\n  providers: [\n    new AttributeMustacheProvider(),\n    new TextMustacheProvider(),\n    new ComponentProvider(),\n    new DataBindProvider(),\n    new VirtualProvider(),\n    new AttributeProvider()\n  ]\n})\n\nutils.options.bindingProviderInstance = 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\ No newline at end of file
diff --git a/packages/tko/dist/tko.js b/packages/tko/dist/tko.js
new file mode 100644
index 00000000..d52ddefc
--- /dev/null
+++ b/packages/tko/dist/tko.js
@@ -0,0 +1,9306 @@
+(function (global, factory) {
+	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
+	typeof define === 'function' && define.amd ? define(factory) :
+	(global.tko = factory());
+}(this, (function () { 'use strict';
+
+//
+// Array utilities
+//
+/* eslint no-cond-assign: 0 */
+function arrayForEach(array, action) {
+    for (var i = 0, j = array.length; i < j; i++)
+        action(array[i], i);
+}
+function arrayIndexOf(array, item) {
+    // IE9
+    if (typeof Array.prototype.indexOf == "function")
+        return Array.prototype.indexOf.call(array, item);
+    for (var i = 0, j = array.length; i < j; i++)
+        if (array[i] === item)
+            return i;
+    return -1;
+}
+function arrayFirst(array, predicate, predicateOwner) {
+    for (var i = 0, j = array.length; i < j; i++)
+        if (predicate.call(predicateOwner, array[i], i))
+            return array[i];
+    return null;
+}
+function arrayRemoveItem(array, itemToRemove) {
+    var index = arrayIndexOf(array, itemToRemove);
+    if (index > 0) {
+        array.splice(index, 1);
+    }
+    else if (index === 0) {
+        array.shift();
+    }
+}
+function arrayGetDistinctValues(array) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++) {
+        if (arrayIndexOf(result, array[i]) < 0)
+            result.push(array[i]);
+    }
+    return result;
+}
+function arrayMap(array, mapping) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++)
+        result.push(mapping(array[i], i));
+    return result;
+}
+function arrayFilter(array, predicate) {
+    array = array || [];
+    var result = [];
+    for (var i = 0, j = array.length; i < j; i++)
+        if (predicate(array[i], i))
+            result.push(array[i]);
+    return result;
+}
+function arrayPushAll(array, valuesToPush) {
+    if (valuesToPush instanceof Array)
+        array.push.apply(array, valuesToPush);
+    else
+        for (var i = 0, j = valuesToPush.length; i < j; i++)
+            array.push(valuesToPush[i]);
+    return array;
+}
+function addOrRemoveItem(array, value, included) {
+    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);
+    if (existingEntryIndex < 0) {
+        if (included)
+            array.push(value);
+    }
+    else {
+        if (!included)
+            array.splice(existingEntryIndex, 1);
+    }
+}
+function makeArray(arrayLikeObject) {
+    var result = [];
+    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {
+        result.push(arrayLikeObject[i]);
+    }
+    return result;
+}
+function range(min, max) {
+    min = typeof min === 'function' ? min() : min;
+    max = typeof max === 'function' ? max() : max;
+    var result = [];
+    for (var i = min; i <= max; i++)
+        result.push(i);
+    return result;
+}
+// Go through the items that have been added and deleted and try to find matches between them.
+function findMovesInArrayComparison(left, right, limitFailedCompares) {
+    if (left.length && right.length) {
+        var failedCompares, l, r, leftItem, rightItem;
+        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {
+            for (r = 0; rightItem = right[r]; ++r) {
+                if (leftItem['value'] === rightItem['value']) {
+                    leftItem['moved'] = rightItem['index'];
+                    rightItem['moved'] = leftItem['index'];
+                    right.splice(r, 1); // This item is marked as moved; so remove it from right list
+                    failedCompares = r = 0; // Reset failed compares count because we're checking for consecutive failures
+                    break;
+                }
+            }
+            failedCompares += r;
+        }
+    }
+}
+var statusNotInOld = 'added';
+var statusNotInNew = 'deleted';
+// Simple calculation based on Levenshtein distance.
+function compareArrays(oldArray, newArray, options) {
+    // For backward compatibility, if the third arg is actually a bool, interpret
+    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.
+    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});
+    oldArray = oldArray || [];
+    newArray = newArray || [];
+    if (oldArray.length < newArray.length)
+        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);
+    else
+        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);
+}
+function compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {
+    var myMin = Math.min, myMax = Math.max, editDistanceMatrix = [], smlIndex, smlIndexMax = smlArray.length, bigIndex, bigIndexMax = bigArray.length, compareRange = (bigIndexMax - smlIndexMax) || 1, maxDistance = smlIndexMax + bigIndexMax + 1, thisRow, lastRow, bigIndexMaxForRow, bigIndexMinForRow;
+    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {
+        lastRow = thisRow;
+        editDistanceMatrix.push(thisRow = []);
+        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);
+        bigIndexMinForRow = myMax(0, smlIndex - 1);
+        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {
+            if (!bigIndex)
+                thisRow[bigIndex] = smlIndex + 1;
+            else if (!smlIndex)
+                thisRow[bigIndex] = bigIndex + 1;
+            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])
+                thisRow[bigIndex] = lastRow[bigIndex - 1]; // copy value (no edit)
+            else {
+                var northDistance = lastRow[bigIndex] || maxDistance; // not in big (deletion)
+                var westDistance = thisRow[bigIndex - 1] || maxDistance; // not in small (addition)
+                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;
+            }
+        }
+    }
+    var editScript = [], meMinusOne, notInSml = [], notInBig = [];
+    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {
+        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;
+        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex - 1]) {
+            notInSml.push(editScript[editScript.length] = {
+                'status': statusNotInSml,
+                'value': bigArray[--bigIndex],
+                'index': bigIndex
+            });
+        }
+        else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {
+            notInBig.push(editScript[editScript.length] = {
+                'status': statusNotInBig,
+                'value': smlArray[--smlIndex],
+                'index': smlIndex
+            });
+        }
+        else {
+            --bigIndex;
+            --smlIndex;
+            if (!options['sparse']) {
+                editScript.push({
+                    'status': "retained",
+                    'value': bigArray[bigIndex]
+                });
+            }
+        }
+    }
+    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of
+    // smlIndexMax keeps the time complexity of this algorithm linear.
+    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);
+    return editScript.reverse();
+}
+
+//
+// This becomes ko.options
+// --
+//
+// This is the root 'options', which must be extended by others.
+var _global;
+try {
+    _global = window;
+}
+catch (e) {
+    _global = global;
+}
+var options = {
+    deferUpdates: false,
+    useOnlyNativeEvents: false,
+    protoProperty: '__ko_proto__',
+    // Modify the default attribute from `data-bind`.
+    defaultBindingAttribute: 'data-bind',
+    // Enable/disable <!-- ko binding: ... -> style bindings
+    allowVirtualElements: true,
+    // Global variables that can be accessed from bindings.
+    bindingGlobals: _global,
+    // An instance of the binding provider.
+    bindingProviderInstance: null,
+    // jQuery will be automatically set to _global.jQuery in applyBindings
+    // if it is (strictly equal to) undefined.  Set it to false or null to
+    // disable automatically setting jQuery.
+    jQuery: _global && _global.jQuery,
+    Promise: _global && _global.Promise,
+    taskScheduler: null,
+    debug: false,
+    global: _global,
+    document: _global.document,
+    // Filters for bindings
+    //   data-bind="expression | filter_1 | filter_2"
+    filters: {},
+    onError: function (e) { throw e; },
+    set: function (name, value) {
+        options[name] = value;
+    }
+};
+Object.defineProperty(options, '$', {
+    get: function () { return options.jQuery; }
+});
+
+//
+// Error handling
+// ---
+//
+// The default onError handler is to re-throw.
+function catchFunctionErrors(delegate) {
+    return options.onError ? function () {
+        try {
+            return delegate.apply(this, arguments);
+        }
+        catch (e) {
+            options.onError(e);
+        }
+    } : delegate;
+}
+function deferError(error) {
+    safeSetTimeout(function () { options.onError(error); }, 0);
+}
+function safeSetTimeout(handler, timeout) {
+    return setTimeout(catchFunctionErrors(handler), timeout);
+}
+
+//
+// Asynchronous functionality
+// ---
+function throttle(callback, timeout) {
+    var timeoutInstance;
+    return function () {
+        if (!timeoutInstance) {
+            timeoutInstance = safeSetTimeout(function () {
+                timeoutInstance = undefined;
+                callback();
+            }, timeout);
+        }
+    };
+}
+function debounce(callback, timeout) {
+    var timeoutInstance;
+    return function () {
+        clearTimeout(timeoutInstance);
+        timeoutInstance = safeSetTimeout(callback, timeout);
+    };
+}
+
+//
+// Detection and Workarounds for Internet Explorer
+//
+// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)
+// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.
+// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.
+// If there is a future need to detect specific versions of IE10+, we will amend this.
+var ieVersion = options.document && (function () {
+    var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');
+    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment
+    while (div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',
+        iElems[0]) { }
+    return version > 4 ? version : undefined;
+}());
+var isIe6 = ieVersion === 6;
+var isIe7 = ieVersion === 7;
+
+//
+// Object functions
+//
+function extend(target, source) {
+    if (source) {
+        for (var prop in source) {
+            if (source.hasOwnProperty(prop)) {
+                target[prop] = source[prop];
+            }
+        }
+    }
+    return target;
+}
+function objectForEach(obj, action) {
+    for (var prop in obj) {
+        if (obj.hasOwnProperty(prop)) {
+            action(prop, obj[prop]);
+        }
+    }
+}
+function objectMap(source, mapping) {
+    if (!source)
+        return source;
+    var target = {};
+    for (var prop in source) {
+        if (source.hasOwnProperty(prop)) {
+            target[prop] = mapping(source[prop], prop, source);
+        }
+    }
+    return target;
+}
+function getObjectOwnProperty(obj, propName) {
+    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;
+}
+function clonePlainObjectDeep(obj, seen) {
+    if (!seen) {
+        seen = [];
+    }
+    if (!obj || typeof obj !== 'object'
+        || obj.constructor !== Object
+        || seen.indexOf(obj) !== -1) {
+        return obj;
+    }
+    // Anything that makes it below is a plain object that has not yet
+    // been seen/cloned.
+    seen.push(obj);
+    var result = {};
+    for (var prop in obj) {
+        if (obj.hasOwnProperty(prop)) {
+            result[prop] = clonePlainObjectDeep(obj[prop], seen);
+        }
+    }
+    return result;
+}
+
+//
+// Prototype Functions
+//
+var protoProperty = options.protoProperty;
+var canSetPrototype = ({ __proto__: [] } instanceof Array);
+function setPrototypeOf(obj, proto) {
+    obj.__proto__ = proto;
+    return obj;
+}
+var setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;
+function hasPrototype(instance, prototype) {
+    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined))
+        return false;
+    if (instance[protoProperty] === prototype)
+        return true;
+    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain
+}
+
+//
+// String (and JSON)
+//
+function stringTrim(string) {
+    return string === null || string === undefined ? '' :
+        string.trim ?
+            string.trim() :
+            string.toString().replace(/^[\s\xa0]+|[\s\xa0]+$/g, '');
+}
+function stringStartsWith(string, startsWith) {
+    string = string || "";
+    if (startsWith.length > string.length)
+        return false;
+    return string.substring(0, startsWith.length) === startsWith;
+}
+function parseJson(jsonString) {
+    if (typeof jsonString == "string") {
+        jsonString = stringTrim(jsonString);
+        if (jsonString) {
+            if (JSON && JSON.parse)
+                return JSON.parse(jsonString);
+            return (new Function("return " + jsonString))(); // Fallback on less safe parsing for older browsers
+        }
+    }
+    return null;
+}
+function stringifyJson(data, replacer, space) {
+    if (!JSON || !JSON.stringify)
+        throw new Error("Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js");
+    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);
+}
+
+//
+// ES6 Symbols
+//
+var useSymbols = typeof Symbol === 'function';
+function createSymbolOrString(identifier) {
+    return useSymbols ? Symbol(identifier) : identifier;
+}
+
+//
+// DOM - CSS
+//
+// For details on the pattern for changing node classes
+// see: https://github.com/knockout/knockout/issues/1597
+var cssClassNameRegex = /\S+/g;
+function toggleDomNodeCssClass(node, classNames, shouldHaveClass) {
+    var addOrRemoveFn;
+    if (!classNames) {
+        return;
+    }
+    if (typeof node.classList === 'object') {
+        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];
+        arrayForEach(classNames.match(cssClassNameRegex), function (className) {
+            addOrRemoveFn.call(node.classList, className);
+        });
+    }
+    else if (typeof node.className['baseVal'] === 'string') {
+        // SVG tag .classNames is an SVGAnimatedString instance
+        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);
+    }
+    else {
+        // node.className ought to be a string.
+        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);
+    }
+}
+function toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {
+    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.
+    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];
+    arrayForEach(classNames.match(cssClassNameRegex), function (className) {
+        addOrRemoveItem(currentClassNames, className, shouldHaveClass);
+    });
+    obj[prop] = currentClassNames.join(" ");
+}
+
+//
+// jQuery
+//
+// TODO: deprecate in favour of options.$
+var jQueryInstance = options.global && options.global.jQuery;
+function jQuerySetInstance(jquery) {
+    options.jQuery = jQueryInstance = jquery;
+}
+
+//
+// Information about the DOM
+//
+function domNodeIsContainedBy(node, containedByNode) {
+    if (node === containedByNode)
+        return true;
+    if (node.nodeType === 11)
+        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8
+    if (containedByNode.contains)
+        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);
+    if (containedByNode.compareDocumentPosition)
+        return (containedByNode.compareDocumentPosition(node) & 16) == 16;
+    while (node && node != containedByNode) {
+        node = node.parentNode;
+    }
+    return !!node;
+}
+function domNodeIsAttachedToDocument(node) {
+    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);
+}
+function anyDomNodeIsAttachedToDocument(nodes) {
+    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);
+}
+function tagNameLower(element) {
+    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.
+    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),
+    // we don't need to do the .toLowerCase() as it will always be lower case anyway.
+    return element && element.tagName && element.tagName.toLowerCase();
+}
+function isDomElement(obj) {
+    if (window.HTMLElement) {
+        return obj instanceof HTMLElement;
+    }
+    else {
+        return obj && obj.tagName && obj.nodeType === 1;
+    }
+}
+function isDocumentFragment(obj) {
+    if (window.DocumentFragment) {
+        return obj instanceof DocumentFragment;
+    }
+    else {
+        return obj && obj.nodeType === 11;
+    }
+}
+
+//
+// DOM node data
+//
+//
+var dataStoreKeyExpandoPropertyName = "__ko__data" + new Date();
+var dataStore;
+var uniqueId = 0;
+var get;
+var set;
+var clear;
+/**
+ * --- Legacy getter/setter (may cause memory leaks) ---
+ */
+function getAll(node, createIfNotFound) {
+    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== "null") && dataStore[dataStoreKey];
+    if (!hasExistingDataStore) {
+        if (!createIfNotFound)
+            return undefined;
+        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = "ko" + uniqueId++;
+        dataStore[dataStoreKey] = {};
+    }
+    return dataStore[dataStoreKey];
+}
+function legacyGet(node, key) {
+    var allDataForNode = getAll(node, false);
+    return allDataForNode === undefined ? undefined : allDataForNode[key];
+}
+function legacySet(node, key, value) {
+    if (value === undefined) {
+        // Make sure we don't actually create a new domData key if we are actually deleting a value
+        if (getAll(node, false) === undefined)
+            return;
+    }
+    var allDataForNode = getAll(node, true);
+    allDataForNode[key] = value;
+}
+function legacyClear(node) {
+    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];
+    if (dataStoreKey) {
+        delete dataStore[dataStoreKey];
+        node[dataStoreKeyExpandoPropertyName] = null;
+        return true; // Exposing "did clean" flag purely so specs can infer whether things have been cleaned up as intended
+    }
+    return false;
+}
+/**
+ * WeakMap get/set/clear
+ */
+function wmGet(node, key) {
+    return (dataStore.get(node) || {})[key];
+}
+function wmSet(node, key, value) {
+    var dataForNode;
+    if (dataStore.has(node)) {
+        dataForNode = dataStore.get(node);
+    }
+    else {
+        dataForNode = {};
+        dataStore.set(node, dataForNode);
+    }
+    dataForNode[key] = value;
+}
+function wmClear(node) {
+    return dataStore["delete"](node);
+}
+if ('WeakMap' in options.global) {
+    dataStore = new WeakMap();
+    get = wmGet;
+    set = wmSet;
+    clear = wmClear;
+}
+else {
+    dataStore = {};
+    get = legacyGet;
+    set = legacySet;
+    clear = legacyClear;
+}
+/**
+ * Create a unique key-string identifier.
+ * FIXME: This should be deprecated.
+ */
+function nextKey() {
+    return (uniqueId++) + dataStoreKeyExpandoPropertyName;
+}
+
+
+var data = Object.freeze({
+	nextKey: nextKey,
+	get get () { return get; },
+	get set () { return set; },
+	get clear () { return clear; }
+});
+
+//
+// DOM node disposal
+//
+/* eslint no-cond-assign: 0 */
+var domDataKey = nextKey();
+// Node types:
+// 1: Element
+// 8: Comment
+// 9: Document
+var cleanableNodeTypes = { 1: true, 8: true, 9: true };
+var cleanableNodeTypesWithDescendants = { 1: true, 9: true };
+function getDisposeCallbacksCollection(node, createIfNotFound) {
+    var allDisposeCallbacks = get(node, domDataKey);
+    if ((allDisposeCallbacks === undefined) && createIfNotFound) {
+        allDisposeCallbacks = [];
+        set(node, domDataKey, allDisposeCallbacks);
+    }
+    return allDisposeCallbacks;
+}
+function destroyCallbacksCollection(node) {
+    set(node, domDataKey, undefined);
+}
+function cleanSingleNode(node) {
+    // Run all the dispose callbacks
+    var callbacks = getDisposeCallbacksCollection(node, false);
+    if (callbacks) {
+        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)
+        for (var i = 0; i < callbacks.length; i++)
+            callbacks[i](node);
+    }
+    // Erase the DOM data
+    clear(node);
+    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)
+    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {
+        otherNodeCleanerFunctions[i](node);
+    }
+    // Clear any immediate-child comment nodes, as these wouldn't have been found by
+    // node.getElementsByTagName("*") in cleanNode() (comment nodes aren't elements)
+    if (cleanableNodeTypesWithDescendants[node.nodeType])
+        cleanImmediateCommentTypeChildren(node);
+}
+function cleanImmediateCommentTypeChildren(nodeWithChildren) {
+    var child, nextChild = nodeWithChildren.firstChild;
+    while (child = nextChild) {
+        nextChild = child.nextSibling;
+        if (child.nodeType === 8)
+            cleanSingleNode(child);
+    }
+}
+// Exports
+function addDisposeCallback(node, callback) {
+    if (typeof callback != "function")
+        throw new Error("Callback must be a function");
+    getDisposeCallbacksCollection(node, true).push(callback);
+}
+function removeDisposeCallback(node, callback) {
+    var callbacksCollection = getDisposeCallbacksCollection(node, false);
+    if (callbacksCollection) {
+        arrayRemoveItem(callbacksCollection, callback);
+        if (callbacksCollection.length == 0)
+            destroyCallbacksCollection(node);
+    }
+}
+function cleanNode(node) {
+    // First clean this node, where applicable
+    if (cleanableNodeTypes[node.nodeType]) {
+        cleanSingleNode(node);
+        // ... then its descendants, where applicable
+        if (cleanableNodeTypesWithDescendants[node.nodeType]) {
+            // Clone the descendants list in case it changes during iteration
+            var descendants = [];
+            arrayPushAll(descendants, node.getElementsByTagName("*"));
+            for (var i = 0, j = descendants.length; i < j; i++)
+                cleanSingleNode(descendants[i]);
+        }
+    }
+    return node;
+}
+function removeNode(node) {
+    cleanNode(node);
+    if (node.parentNode)
+        node.parentNode.removeChild(node);
+}
+// Expose supplemental node cleaning functions.
+var otherNodeCleanerFunctions = [];
+// Special support for jQuery here because it's so commonly used.
+// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData
+// so notify it to tear down any resources associated with the node & descendants here.
+function cleanjQueryData(node) {
+    var jQueryCleanNodeFn = jQueryInstance
+        ? jQueryInstance.cleanData : null;
+    if (jQueryCleanNodeFn) {
+        jQueryCleanNodeFn([node]);
+    }
+}
+otherNodeCleanerFunctions.push(cleanjQueryData);
+
+//
+// DOM Events
+//
+// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)
+var knownEvents = {};
+var knownEventTypesByEventName = {};
+var keyEventTypeName = (options.global.navigator && /Firefox\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';
+knownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];
+knownEvents['MouseEvents'] = [
+    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',
+    'mouseout', 'mouseenter', 'mouseleave'
+];
+objectForEach(knownEvents, function (eventType, knownEventsForType) {
+    if (knownEventsForType.length) {
+        for (var i = 0, j = knownEventsForType.length; i < j; i++)
+            knownEventTypesByEventName[knownEventsForType[i]] = eventType;
+    }
+});
+function isClickOnCheckableElement(element, eventType) {
+    if ((tagNameLower(element) !== "input") || !element.type)
+        return false;
+    if (eventType.toLowerCase() != "click")
+        return false;
+    var inputType = element.type;
+    return (inputType == "checkbox") || (inputType == "radio");
+}
+// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406
+var eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };
+function registerEventHandler(element, eventType, handler) {
+    var wrappedHandler = catchFunctionErrors(handler);
+    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];
+    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {
+        jQueryInstance(element).bind(eventType, wrappedHandler);
+    }
+    else if (!mustUseAttachEvent && typeof element.addEventListener == "function")
+        element.addEventListener(eventType, wrappedHandler, false);
+    else if (typeof element.attachEvent !== "undefined") {
+        var attachEventHandler = function (event) { wrappedHandler.call(element, event); }, attachEventName = "on" + eventType;
+        element.attachEvent(attachEventName, attachEventHandler);
+        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)
+        // so to avoid leaks, we have to remove them manually. See bug #856
+        addDisposeCallback(element, function () {
+            element.detachEvent(attachEventName, attachEventHandler);
+        });
+    }
+    else
+        throw new Error("Browser doesn't support addEventListener or attachEvent");
+}
+function triggerEvent(element, eventType) {
+    if (!(element && element.nodeType))
+        throw new Error("element must be a DOM node when calling triggerEvent");
+    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the
+    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)
+    // IE doesn't change the checked state when you trigger the click event using "fireEvent".
+    // In both cases, we'll use the click method instead.
+    var useClickWorkaround = isClickOnCheckableElement(element, eventType);
+    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {
+        jQueryInstance(element).trigger(eventType);
+    }
+    else if (typeof document.createEvent == "function") {
+        if (typeof element.dispatchEvent == "function") {
+            var eventCategory = knownEventTypesByEventName[eventType] || "HTMLEvents";
+            var event = document.createEvent(eventCategory);
+            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);
+            element.dispatchEvent(event);
+        }
+        else
+            throw new Error("The supplied element doesn't support dispatchEvent");
+    }
+    else if (useClickWorkaround && element.click) {
+        element.click();
+    }
+    else if (typeof element.fireEvent != "undefined") {
+        element.fireEvent("on" + eventType);
+    }
+    else {
+        throw new Error("Browser doesn't support triggering events");
+    }
+}
+
+//
+//  DOM node manipulation
+//
+function fixUpContinuousNodeArray(continuousNodeArray, parentNode) {
+    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile
+    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that
+    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been
+    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.
+    // So, this function translates the old "map" output array into its best guess of the set of current DOM nodes.
+    //
+    // Rules:
+    //   [A] Any leading nodes that have been removed should be ignored
+    //       These most likely correspond to memoization nodes that were already removed during binding
+    //       See https://github.com/knockout/knockout/pull/440
+    //   [B] Any trailing nodes that have been remove should be ignored
+    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]
+    //       See https://github.com/knockout/knockout/pull/1903
+    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,
+    //       and include any nodes that have been inserted among the previous collection
+    if (continuousNodeArray.length) {
+        // The parent node can be a virtual element; so get the real parent node
+        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;
+        // Rule [A]
+        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)
+            continuousNodeArray.splice(0, 1);
+        // Rule [B]
+        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)
+            continuousNodeArray.length--;
+        // Rule [C]
+        if (continuousNodeArray.length > 1) {
+            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];
+            // Replace with the actual new continuous node set
+            continuousNodeArray.length = 0;
+            while (current !== last) {
+                continuousNodeArray.push(current);
+                current = current.nextSibling;
+            }
+            continuousNodeArray.push(last);
+        }
+    }
+    return continuousNodeArray;
+}
+function setOptionNodeSelectionState(optionNode, isSelected) {
+    // IE6 sometimes throws "unknown error" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.
+    if (ieVersion < 7)
+        optionNode.setAttribute("selected", isSelected);
+    else
+        optionNode.selected = isSelected;
+}
+function forceRefresh(node) {
+    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209
+    if (ieVersion >= 9) {
+        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container
+        var elem = node.nodeType == 1 ? node : node.parentNode;
+        if (elem.style)
+            elem.style.zoom = elem.style.zoom;
+    }
+}
+function ensureSelectElementIsRenderedCorrectly(selectElement) {
+    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.
+    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)
+    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)
+    if (ieVersion) {
+        var originalWidth = selectElement.style.width;
+        selectElement.style.width = 0;
+        selectElement.style.width = originalWidth;
+    }
+}
+
+/* eslint no-cond-assign: 0 */
+//
+// Virtual Elements
+//
+//
+// "Virtual elements" is an abstraction on top of the usual DOM API which understands the notion that comment nodes
+// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).
+// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state
+// of that virtual hierarchy
+//
+// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)
+// without having to scatter special cases all over the binding and templating code.
+// IE 9 cannot reliably read the "nodeValue" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)
+// but it does give them a nonstandard alternative property called "text" that it can read reliably. Other browsers don't have that property.
+// So, use node.text where available, and node.nodeValue elsewhere
+var commentNodesHaveTextProperty = options.document && options.document.createComment("test").text === "<!--test-->";
+var startCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*ko(?:\s+([\s\S]+))?\s*-->$/ : /^\s*ko(?:\s+([\s\S]+))?\s*$/;
+var endCommentRegex = commentNodesHaveTextProperty ? /^<!--\s*\/ko\s*-->$/ : /^\s*\/ko\s*$/;
+var htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };
+function isStartComment(node) {
+    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
+}
+function isEndComment(node) {
+    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);
+}
+function getVirtualChildren(startComment, allowUnbalanced) {
+    var currentNode = startComment;
+    var depth = 1;
+    var children = [];
+    while (currentNode = currentNode.nextSibling) {
+        if (isEndComment(currentNode)) {
+            depth--;
+            if (depth === 0)
+                return children;
+        }
+        children.push(currentNode);
+        if (isStartComment(currentNode))
+            depth++;
+    }
+    if (!allowUnbalanced)
+        throw new Error("Cannot find closing comment tag to match: " + startComment.nodeValue);
+    return null;
+}
+function getMatchingEndComment(startComment, allowUnbalanced) {
+    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);
+    if (allVirtualChildren) {
+        if (allVirtualChildren.length > 0)
+            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;
+        return startComment.nextSibling;
+    }
+    else
+        return null; // Must have no matching end comment, and allowUnbalanced is true
+}
+function getUnbalancedChildTags(node) {
+    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>
+    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->
+    var childNode = node.firstChild, captureRemaining = null;
+    if (childNode) {
+        do {
+            if (captureRemaining)
+                captureRemaining.push(childNode);
+            else if (isStartComment(childNode)) {
+                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);
+                if (matchingEndComment)
+                    childNode = matchingEndComment;
+                else
+                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point
+            }
+            else if (isEndComment(childNode)) {
+                captureRemaining = [childNode]; // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing
+            }
+        } while (childNode = childNode.nextSibling);
+    }
+    return captureRemaining;
+}
+var allowedBindings = {};
+var hasBindingValue = isStartComment;
+function childNodes(node) {
+    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;
+}
+function emptyNode(node) {
+    if (!isStartComment(node))
+        emptyDomNode(node);
+    else {
+        var virtualChildren = childNodes(node);
+        for (var i = 0, j = virtualChildren.length; i < j; i++)
+            removeNode(virtualChildren[i]);
+    }
+}
+function setDomNodeChildren$1(node, childNodes) {
+    if (!isStartComment(node))
+        setDomNodeChildren(node, childNodes);
+    else {
+        emptyNode(node);
+        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children
+        for (var i = 0, j = childNodes.length; i < j; i++)
+            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);
+    }
+}
+function prepend(containerNode, nodeToPrepend) {
+    if (!isStartComment(containerNode)) {
+        if (containerNode.firstChild)
+            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);
+        else
+            containerNode.appendChild(nodeToPrepend);
+    }
+    else {
+        // Start comments must always have a parent and at least one following sibling (the end comment)
+        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);
+    }
+}
+function insertAfter(containerNode, nodeToInsert, insertAfterNode) {
+    if (!insertAfterNode) {
+        prepend(containerNode, nodeToInsert);
+    }
+    else if (!isStartComment(containerNode)) {
+        // Insert after insertion point
+        if (insertAfterNode.nextSibling)
+            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+        else
+            containerNode.appendChild(nodeToInsert);
+    }
+    else {
+        // Children of start comments must always have a parent and at least one following sibling (the end comment)
+        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);
+    }
+}
+function firstChild(node) {
+    if (!isStartComment(node)) {
+        return node.firstChild;
+    }
+    if (!node.nextSibling || isEndComment(node.nextSibling)) {
+        return null;
+    }
+    return node.nextSibling;
+}
+function lastChild(node) {
+    var nextChild = firstChild(node), lastChildNode;
+    do {
+        lastChildNode = nextChild;
+    } while (nextChild = nextSibling(nextChild));
+    return lastChildNode;
+}
+function nextSibling(node) {
+    if (isStartComment(node))
+        node = getMatchingEndComment(node);
+    if (node.nextSibling && isEndComment(node.nextSibling))
+        return null;
+    return node.nextSibling;
+}
+function previousSibling(node) {
+    var depth = 0;
+    do {
+        if (node.nodeType === 8) {
+            if (isStartComment(node)) {
+                if (--depth === 0) {
+                    return node;
+                }
+            }
+            else if (isEndComment(node)) {
+                depth++;
+            }
+        }
+        else {
+            if (depth === 0) {
+                return node;
+            }
+        }
+    } while (node = node.previousSibling);
+    return;
+}
+function virtualNodeBindingValue(node) {
+    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);
+    return regexMatch ? regexMatch[1] : null;
+}
+function normaliseVirtualElementDomStructure(elementVerified) {
+    // Workaround for https://github.com/SteveSanderson/knockout/issues/155
+    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes
+    // that are direct descendants of <ul> into the preceding <li>)
+    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])
+        return;
+    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags
+    // must be intended to appear *after* that child, so move them there.
+    var childNode = elementVerified.firstChild;
+    if (childNode) {
+        do {
+            if (childNode.nodeType === 1) {
+                var unbalancedTags = getUnbalancedChildTags(childNode);
+                if (unbalancedTags) {
+                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child
+                    var nodeToInsertBefore = childNode.nextSibling;
+                    for (var i = 0; i < unbalancedTags.length; i++) {
+                        if (nodeToInsertBefore)
+                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);
+                        else
+                            elementVerified.appendChild(unbalancedTags[i]);
+                    }
+                }
+            }
+        } while (childNode = childNode.nextSibling);
+    }
+}
+
+
+
+var virtualElements = Object.freeze({
+	startCommentRegex: startCommentRegex,
+	endCommentRegex: endCommentRegex,
+	isStartComment: isStartComment,
+	isEndComment: isEndComment,
+	getVirtualChildren: getVirtualChildren,
+	allowedBindings: allowedBindings,
+	hasBindingValue: hasBindingValue,
+	childNodes: childNodes,
+	emptyNode: emptyNode,
+	setDomNodeChildren: setDomNodeChildren$1,
+	prepend: prepend,
+	insertAfter: insertAfter,
+	firstChild: firstChild,
+	lastChild: lastChild,
+	nextSibling: nextSibling,
+	previousSibling: previousSibling,
+	virtualNodeBindingValue: virtualNodeBindingValue,
+	normaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure
+});
+
+//
+// DOM manipulation
+//
+/* eslint no-empty: 0 */
+function moveCleanedNodesToContainerElement(nodes) {
+    // Ensure it's a real array, as we're about to reparent the nodes and
+    // we don't want the underlying collection to change while we're doing that.
+    var nodesArray = makeArray(nodes);
+    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;
+    var container = templateDocument.createElement('div');
+    for (var i = 0, j = nodesArray.length; i < j; i++) {
+        container.appendChild(cleanNode(nodesArray[i]));
+    }
+    return container;
+}
+function cloneNodes(nodesArray, shouldCleanNodes) {
+    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {
+        var clonedNode = nodesArray[i].cloneNode(true);
+        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);
+    }
+    return newNodesArray;
+}
+function setDomNodeChildren(domNode, childNodes$$1) {
+    emptyDomNode(domNode);
+    if (childNodes$$1) {
+        for (var i = 0, j = childNodes$$1.length; i < j; i++)
+            domNode.appendChild(childNodes$$1[i]);
+    }
+}
+function replaceDomNodes(nodeToReplaceOrNodeArray, newNodesArray) {
+    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;
+    if (nodesToReplaceArray.length > 0) {
+        var insertionPoint = nodesToReplaceArray[0];
+        var parent = insertionPoint.parentNode;
+        for (var i = 0, j = newNodesArray.length; i < j; i++)
+            parent.insertBefore(newNodesArray[i], insertionPoint);
+        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {
+            removeNode(nodesToReplaceArray[i]);
+        }
+    }
+}
+function setElementName(element, name) {
+    element.name = name;
+    // Workaround IE 6/7 issue
+    // - https://github.com/SteveSanderson/knockout/issues/197
+    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/
+    if (ieVersion <= 7) {
+        try {
+            element.mergeAttributes(document.createElement("<input name='" + element.name + "'/>"), false);
+        }
+        catch (e) { } // For IE9 with doc mode "IE9 Standards" and browser mode "IE9 Compatibility View"
+    }
+}
+function setTextContent(element, textContent) {
+    var value = typeof textContent === 'function' ? textContent() : textContent;
+    if ((value === null) || (value === undefined))
+        value = "";
+    // We need there to be exactly one child: a text node.
+    // If there are no children, more than one, or if it's not a text node,
+    // we'll clear everything and create a single text node.
+    var innerTextNode = firstChild(element);
+    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {
+        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);
+    }
+    else {
+        innerTextNode.data = value;
+    }
+    forceRefresh(element);
+}
+function emptyDomNode(domNode) {
+    while (domNode.firstChild) {
+        removeNode(domNode.firstChild);
+    }
+}
+
+//
+// HTML-based manipulation
+//
+var none = [0, "", ""];
+var table = [1, "<table>", "</table>"];
+var tbody = [2, "<table><tbody>", "</tbody></table>"];
+var colgroup = [2, "<table><tbody></tbody><colgroup>", "</colgroup></table>"];
+var tr = [3, "<table><tbody><tr>", "</tr></tbody></table>"];
+var select = [1, "<select multiple='multiple'>", "</select>"];
+var fieldset = [1, "<fieldset>", "</fieldset>"];
+var map = [1, "<map>", "</map>"];
+var object = [1, "<object>", "</object>"];
+var lookup = {
+    'area': map,
+    'col': colgroup,
+    'colgroup': table,
+    'caption': table,
+    'legend': fieldset,
+    'thead': table,
+    'tbody': table,
+    'tfoot': table,
+    'tr': tbody,
+    'td': tr,
+    'th': tr,
+    'option': select,
+    'optgroup': select,
+    'param': object
+};
+var supportsTemplateTag = options.document && 'content' in options.document.createElement('template');
+function getWrap(tags) {
+    var m = tags.match(/^<([a-z]+)[ >]/);
+    return (m && lookup[m[1]]) || none;
+}
+function simpleHtmlParse(html, documentContext) {
+    documentContext || (documentContext = document);
+    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;
+    // Based on jQuery's "clean" function, but only accounting for table-related elements.
+    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's "clean" function directly
+    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of
+    // a descendant node. For example: "<div><!-- mycomment -->abc</div>" will get parsed as "<div>abc</div>"
+    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node
+    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.
+    // Trim whitespace, otherwise indexOf won't work as expected
+    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement("div"), wrap = getWrap(tags), depth = wrap[0];
+    // Go to html and back, then peel off extra wrappers
+    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.
+    var markup = "ignored<div>" + wrap[1] + html + wrap[2] + "</div>";
+    if (typeof windowContext['innerShiv'] == "function") {
+        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding
+        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv
+        // somehow shims the native APIs so it just works anyway)
+        div.appendChild(windowContext['innerShiv'](markup));
+    }
+    else {
+        div.innerHTML = markup;
+    }
+    // Move to the right depth
+    while (depth--)
+        div = div.lastChild;
+    return makeArray(div.lastChild.childNodes);
+}
+function templateHtmlParse(html, documentContext) {
+    if (!documentContext) {
+        documentContext = document;
+    }
+    var template = documentContext.createElement('template');
+    template.innerHTML = html;
+    return makeArray(template.content.childNodes);
+}
+function jQueryHtmlParse(html, documentContext) {
+    // jQuery's "parseHTML" function was introduced in jQuery 1.8.0 and is a documented public API.
+    if (jQueryInstance.parseHTML) {
+        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null
+    }
+    else {
+        // For jQuery < 1.8.0, we fall back on the undocumented internal "clean" function.
+        var elems = jQueryInstance.clean([html], documentContext);
+        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.
+        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.
+        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.
+        if (elems && elems[0]) {
+            // Find the top-most parent element that's a direct child of a document fragment
+            var elem = elems[0];
+            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)
+                elem = elem.parentNode;
+            // ... then detach it
+            if (elem.parentNode)
+                elem.parentNode.removeChild(elem);
+        }
+        return elems;
+    }
+}
+/**
+ * parseHtmlFragment converts a string into an array of DOM Nodes.
+ * If supported, it uses <template>-tag parsing, falling back on
+ * jQuery parsing (if jQuery is present), and finally on a
+ * straightforward parser.
+ *
+ * @param  {string} html            To be parsed.
+ * @param  {Object} documentContext That owns the executing code.
+ * @return {[DOMNode]}              Parsed DOM Nodes
+ */
+function parseHtmlFragment(html, documentContext) {
+    // Prefer <template>-tag based HTML parsing.
+    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :
+        // Benefit from jQuery's on old browsers, where possible
+        // NOTE: jQuery's HTML parsing fails on element names like tr-*.
+        // See: https://github.com/jquery/jquery/pull/1988
+        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :
+            // ... otherwise, this simple logic will do in most common cases.
+            simpleHtmlParse(html, documentContext));
+}
+/**
+  * setHtml empties the node's contents, unwraps the HTML, and
+  * sets the node's HTML using jQuery.html or parseHtmlFragment
+  *
+  * @param {DOMNode} node Node in which HTML needs to be set
+  * @param {DOMNode} html HTML to be inserted in node
+  * @returns undefined
+  */
+function setHtml(node, html) {
+    emptyDomNode(node);
+    // There's few cases where we would want to display a stringified
+    // function, so we unwrap it.
+    if (typeof html === 'function') {
+        html = html();
+    }
+    if ((html !== null) && (html !== undefined)) {
+        if (typeof html !== 'string')
+            html = html.toString();
+        // If the browser supports <template> tags, prefer that, as
+        // it obviates all the complex workarounds of jQuery.
+        //
+        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,
+        // for example <tr> elements which are not normally allowed to exist on their own.
+        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.
+        if (jQueryInstance && !supportsTemplateTag) {
+            jQueryInstance(node).html(html);
+        }
+        else {
+            // ... otherwise, use KO's own parsing logic.
+            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);
+            if (node.nodeType === 8) {
+                if (html === null) {
+                    emptyNode(node);
+                }
+                else {
+                    setDomNodeChildren$1(node, parsedNodes);
+                }
+            }
+            else {
+                for (var i = 0; i < parsedNodes.length; i++)
+                    node.appendChild(parsedNodes[i]);
+            }
+        }
+    }
+}
+
+//
+// Memoization
+//
+var memos = {};
+function randomMax8HexChars() {
+    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);
+}
+function generateRandomId() {
+    return randomMax8HexChars() + randomMax8HexChars();
+}
+function findMemoNodes(rootNode, appendToArray) {
+    if (!rootNode)
+        return;
+    if (rootNode.nodeType == 8) {
+        var memoId = parseMemoText(rootNode.nodeValue);
+        if (memoId != null)
+            appendToArray.push({ domNode: rootNode, memoId: memoId });
+    }
+    else if (rootNode.nodeType == 1) {
+        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)
+            findMemoNodes(childNodes[i], appendToArray);
+    }
+}
+function memoize(callback) {
+    if (typeof callback != "function")
+        throw new Error("You can only pass a function to memoization.memoize()");
+    var memoId = generateRandomId();
+    memos[memoId] = callback;
+    return "<!--[ko_memo:" + memoId + "]-->";
+}
+function unmemoize(memoId, callbackParams) {
+    var callback = memos[memoId];
+    if (callback === undefined)
+        throw new Error("Couldn't find any memo with ID " + memoId + ". Perhaps it's already been unmemoized.");
+    try {
+        callback.apply(null, callbackParams || []);
+        return true;
+    }
+    finally {
+        delete memos[memoId];
+    }
+}
+function unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {
+    var memos = [];
+    findMemoNodes(domNode, memos);
+    for (var i = 0, j = memos.length; i < j; i++) {
+        var node = memos[i].domNode;
+        var combinedParams = [node];
+        if (extraCallbackParamsArray)
+            arrayPushAll(combinedParams, extraCallbackParamsArray);
+        unmemoize(memos[i].memoId, combinedParams);
+        node.nodeValue = ""; // Neuter this node so we don't try to unmemoize it again
+        if (node.parentNode)
+            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)
+    }
+}
+function parseMemoText(memoText) {
+    var match = memoText.match(/^\[ko_memo\:(.*?)\]$/);
+    return match ? match[1] : null;
+}
+
+
+
+var memoization = Object.freeze({
+	memoize: memoize,
+	unmemoize: unmemoize,
+	unmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,
+	parseMemoText: parseMemoText
+});
+
+//
+//  Tasks Micro-scheduler
+//  ===
+//
+/* eslint no-cond-assign: 0 */
+var taskQueue = [];
+var taskQueueLength = 0;
+var nextHandle = 1;
+var nextIndexToProcess = 0;
+var w = options.global;
+if (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {
+    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node
+    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT
+    options.taskScheduler = (function (callback) {
+        var div = w.document.createElement("div");
+        new MutationObserver(callback).observe(div, { attributes: true });
+        return function () { div.classList.toggle("foo"); };
+    })(scheduledProcess);
+}
+else if (w && w.document && "onreadystatechange" in w.document.createElement("script")) {
+    // IE 6-10
+    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT
+    options.taskScheduler = function (callback) {
+        var script = document.createElement("script");
+        script.onreadystatechange = function () {
+            script.onreadystatechange = null;
+            document.documentElement.removeChild(script);
+            script = null;
+            callback();
+        };
+        document.documentElement.appendChild(script);
+    };
+}
+else {
+    options.taskScheduler = function (callback) {
+        setTimeout(callback, 0);
+    };
+}
+function processTasks() {
+    if (taskQueueLength) {
+        // Each mark represents the end of a logical group of tasks and the number of these groups is
+        // limited to prevent unchecked recursion.
+        var mark = taskQueueLength, countMarks = 0;
+        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue
+        for (var task; nextIndexToProcess < taskQueueLength;) {
+            if (task = taskQueue[nextIndexToProcess++]) {
+                if (nextIndexToProcess > mark) {
+                    if (++countMarks >= 5000) {
+                        nextIndexToProcess = taskQueueLength; // skip all tasks remaining in the queue since any of them could be causing the recursion
+                        deferError(Error("'Too much recursion' after processing " + countMarks + " task groups."));
+                        break;
+                    }
+                    mark = taskQueueLength;
+                }
+                try {
+                    task();
+                }
+                catch (ex) {
+                    deferError(ex);
+                }
+            }
+        }
+    }
+}
+function scheduledProcess() {
+    processTasks();
+    // Reset the queue
+    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
+}
+function scheduleTaskProcessing() {
+    options.taskScheduler(scheduledProcess);
+}
+function schedule(func) {
+    if (!taskQueueLength) {
+        scheduleTaskProcessing();
+    }
+    taskQueue[taskQueueLength++] = func;
+    return nextHandle++;
+}
+function cancel(handle) {
+    var index = handle - (nextHandle - taskQueueLength);
+    if (index >= nextIndexToProcess && index < taskQueueLength) {
+        taskQueue[index] = null;
+    }
+}
+// For testing only: reset the queue and return the previous queue length
+function resetForTesting() {
+    var length = taskQueueLength - nextIndexToProcess;
+    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;
+    return length;
+}
+
+
+var tasks = Object.freeze({
+	schedule: schedule,
+	cancel: cancel,
+	resetForTesting: resetForTesting,
+	runEarly: processTasks
+});
+
+
+
+
+
+var utils = Object.freeze({
+	tasks: tasks,
+	virtualElements: virtualElements,
+	domData: data,
+	memoization: memoization,
+	jQuerySetInstance: jQuerySetInstance,
+	options: options,
+	arrayForEach: arrayForEach,
+	arrayIndexOf: arrayIndexOf,
+	arrayFirst: arrayFirst,
+	arrayRemoveItem: arrayRemoveItem,
+	arrayGetDistinctValues: arrayGetDistinctValues,
+	arrayMap: arrayMap,
+	arrayFilter: arrayFilter,
+	arrayPushAll: arrayPushAll,
+	addOrRemoveItem: addOrRemoveItem,
+	makeArray: makeArray,
+	range: range,
+	findMovesInArrayComparison: findMovesInArrayComparison,
+	compareArrays: compareArrays,
+	throttle: throttle,
+	debounce: debounce,
+	catchFunctionErrors: catchFunctionErrors,
+	deferError: deferError,
+	safeSetTimeout: safeSetTimeout,
+	ieVersion: ieVersion,
+	isIe6: isIe6,
+	isIe7: isIe7,
+	extend: extend,
+	objectForEach: objectForEach,
+	objectMap: objectMap,
+	getObjectOwnProperty: getObjectOwnProperty,
+	clonePlainObjectDeep: clonePlainObjectDeep,
+	canSetPrototype: canSetPrototype,
+	setPrototypeOf: setPrototypeOf,
+	setPrototypeOfOrExtend: setPrototypeOfOrExtend,
+	hasPrototype: hasPrototype,
+	stringTrim: stringTrim,
+	stringStartsWith: stringStartsWith,
+	parseJson: parseJson,
+	stringifyJson: stringifyJson,
+	useSymbols: useSymbols,
+	createSymbolOrString: createSymbolOrString,
+	toggleDomNodeCssClass: toggleDomNodeCssClass,
+	registerEventHandler: registerEventHandler,
+	triggerEvent: triggerEvent,
+	domNodeIsContainedBy: domNodeIsContainedBy,
+	domNodeIsAttachedToDocument: domNodeIsAttachedToDocument,
+	anyDomNodeIsAttachedToDocument: anyDomNodeIsAttachedToDocument,
+	tagNameLower: tagNameLower,
+	isDomElement: isDomElement,
+	isDocumentFragment: isDocumentFragment,
+	moveCleanedNodesToContainerElement: moveCleanedNodesToContainerElement,
+	cloneNodes: cloneNodes,
+	setDomNodeChildren: setDomNodeChildren,
+	replaceDomNodes: replaceDomNodes,
+	setElementName: setElementName,
+	setTextContent: setTextContent,
+	emptyDomNode: emptyDomNode,
+	fixUpContinuousNodeArray: fixUpContinuousNodeArray,
+	setOptionNodeSelectionState: setOptionNodeSelectionState,
+	forceRefresh: forceRefresh,
+	ensureSelectElementIsRenderedCorrectly: ensureSelectElementIsRenderedCorrectly,
+	parseHtmlFragment: parseHtmlFragment,
+	setHtml: setHtml,
+	addDisposeCallback: addDisposeCallback,
+	removeDisposeCallback: removeDisposeCallback,
+	cleanNode: cleanNode,
+	removeNode: removeNode,
+	otherNodeCleanerFunctions: otherNodeCleanerFunctions,
+	cleanjQueryData: cleanjQueryData
+});
+
+//
+//  Defer Updates
+//  ===
+//
+function deferUpdates(target) {
+    if (!target._deferUpdates) {
+        target._deferUpdates = true;
+        target.limit(function (callback) {
+            var handle;
+            return function () {
+                tasks.cancel(handle);
+                handle = tasks.schedule(callback);
+                target.notifySubscribers(undefined, 'dirty');
+            };
+        });
+    }
+}
+
+//
+// Observable extenders
+// ---
+//
+var primitiveTypes = {
+    'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1
+};
+function valuesArePrimitiveAndEqual(a, b) {
+    var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);
+    return oldValueIsPrimitive ? (a === b) : false;
+}
+function applyExtenders(requestedExtenders) {
+    var target = this;
+    if (requestedExtenders) {
+        objectForEach(requestedExtenders, function (key, value) {
+            var extenderHandler = extenders[key];
+            if (typeof extenderHandler === 'function') {
+                target = extenderHandler(target, value) || target;
+            }
+            else {
+                options.onError(new Error('Extender not found: ' + key));
+            }
+        });
+    }
+    return target;
+}
+/*
+                --- DEFAULT EXTENDERS ---
+ */
+// Change when notifications are published.
+function notify(target, notifyWhen) {
+    target.equalityComparer = notifyWhen == 'always' ?
+        null : // null equalityComparer means to always notify
+        valuesArePrimitiveAndEqual;
+}
+function deferred(target, option) {
+    if (option !== true) {
+        throw new Error('The \'deferred\' extender only accepts the value \'true\', because it is not supported to turn deferral off once enabled.');
+    }
+    deferUpdates(target);
+}
+function rateLimit(target, options$$1) {
+    var timeout, method, limitFunction;
+    if (typeof options$$1 === 'number') {
+        timeout = options$$1;
+    }
+    else {
+        timeout = options$$1.timeout;
+        method = options$$1.method;
+    }
+    // rateLimit supersedes deferred updates
+    target._deferUpdates = false;
+    limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;
+    target.limit(function (callback) {
+        return limitFunction(callback, timeout);
+    });
+}
+var extenders = {
+    notify: notify,
+    deferred: deferred,
+    rateLimit: rateLimit
+};
+
+/* eslint no-cond-assign: 0 */
+function subscription(target, callback, disposeCallback) {
+    this._target = target;
+    this.callback = callback;
+    this.disposeCallback = disposeCallback;
+    this.isDisposed = false;
+}
+subscription.prototype.dispose = function () {
+    this.isDisposed = true;
+    this.disposeCallback();
+};
+function subscribable() {
+    setPrototypeOfOrExtend(this, ko_subscribable_fn);
+    ko_subscribable_fn.init(this);
+}
+var defaultEvent = 'change';
+var ko_subscribable_fn = {
+    init: function (instance) {
+        instance._subscriptions = {};
+        instance._versionNumber = 1;
+    },
+    subscribe: function (callback, callbackTarget, event) {
+        var self = this;
+        event = event || defaultEvent;
+        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;
+        var subscriptionInstance = new subscription(self, boundCallback, function () {
+            arrayRemoveItem(self._subscriptions[event], subscriptionInstance);
+            if (self.afterSubscriptionRemove) {
+                self.afterSubscriptionRemove(event);
+            }
+        });
+        if (self.beforeSubscriptionAdd) {
+            self.beforeSubscriptionAdd(event);
+        }
+        if (!self._subscriptions[event]) {
+            self._subscriptions[event] = [];
+        }
+        self._subscriptions[event].push(subscriptionInstance);
+        return subscriptionInstance;
+    },
+    notifySubscribers: function (valueToNotify, event) {
+        event = event || defaultEvent;
+        if (event === defaultEvent) {
+            this.updateVersion();
+        }
+        if (this.hasSubscriptionsForEvent(event)) {
+            try {
+                begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)
+                for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {
+                    // In case a subscription was disposed during the arrayForEach cycle, check
+                    // for isDisposed on each subscription before invoking its callback
+                    if (!subscriptionInstance.isDisposed) {
+                        subscriptionInstance.callback(valueToNotify);
+                    }
+                }
+            }
+            finally {
+                end(); // End suppressing dependency detection
+            }
+        }
+    },
+    getVersion: function () {
+        return this._versionNumber;
+    },
+    hasChanged: function (versionToCheck) {
+        return this.getVersion() !== versionToCheck;
+    },
+    updateVersion: function () {
+        ++this._versionNumber;
+    },
+    hasSubscriptionsForEvent: function (event) {
+        return this._subscriptions[event] && this._subscriptions[event].length;
+    },
+    getSubscriptionsCount: function (event) {
+        if (event) {
+            return this._subscriptions[event] && this._subscriptions[event].length || 0;
+        }
+        else {
+            var total = 0;
+            objectForEach(this._subscriptions, function (eventName, subscriptions) {
+                if (eventName !== 'dirty') {
+                    total += subscriptions.length;
+                }
+            });
+            return total;
+        }
+    },
+    isDifferent: function (oldValue, newValue) {
+        return !this.equalityComparer ||
+            !this.equalityComparer(oldValue, newValue);
+    },
+    once: function (cb) {
+        var subs = this.subscribe(function (nv) {
+            subs.dispose();
+            cb(nv);
+        });
+    },
+    when: function (test, returnValue) {
+        var _this = this;
+        var current = this.peek();
+        var givenRv = arguments.length > 1;
+        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };
+        if (testFn(current)) {
+            return options.Promise.resolve(givenRv ? returnValue : current);
+        }
+        return new options.Promise(function (resolve, reject) {
+            var subs = _this.subscribe(function (newValue) {
+                if (testFn(newValue)) {
+                    subs.dispose();
+                    resolve(givenRv ? returnValue : newValue);
+                }
+            });
+        });
+    },
+    yet: function (test) {
+        var args = [];
+        for (var _i = 1; _i < arguments.length; _i++) {
+            args[_i - 1] = arguments[_i];
+        }
+        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };
+        var negated = function (v) { return !testFn(v); };
+        return this.when.apply(this, [negated].concat(args));
+    },
+    next: function () {
+        var _this = this;
+        return new Promise(function (resolve) { return _this.once(resolve); });
+    },
+    extend: applyExtenders
+};
+// For browsers that support proto assignment, we overwrite the prototype of each
+// observable instance. Since observables are functions, we need Function.prototype
+// to still be in the prototype chain.
+if (canSetPrototype) {
+    setPrototypeOf(ko_subscribable_fn, Function.prototype);
+}
+subscribable.fn = ko_subscribable_fn;
+function isSubscribable(instance) {
+    return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function';
+}
+
+//
+// dependencyDetection
+// ---
+//
+// In KO 3.x, dependencyDetection was also known as computedContext.
+//
+var outerFrames = [];
+var currentFrame;
+var lastId = 0;
+// Return a unique ID that can be assigned to an observable for dependency tracking.
+// Theoretically, you could eventually overflow the number storage size, resulting
+// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53
+// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would
+// take over 285 years to reach that number.
+// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html
+function getId() {
+    return ++lastId;
+}
+function begin(options$$1) {
+    outerFrames.push(currentFrame);
+    currentFrame = options$$1;
+}
+function end() {
+    currentFrame = outerFrames.pop();
+}
+function registerDependency(subscribable$$1) {
+    if (currentFrame) {
+        if (!isSubscribable(subscribable$$1)) {
+            throw new Error('Only subscribable things can act as dependencies');
+        }
+        currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));
+    }
+}
+function ignore(callback, callbackTarget, callbackArgs) {
+    try {
+        begin();
+        return callback.apply(callbackTarget, callbackArgs || []);
+    }
+    finally {
+        end();
+    }
+}
+function getDependenciesCount() {
+    if (currentFrame) {
+        return currentFrame.computed.getDependenciesCount();
+    }
+}
+function isInitial() {
+    if (currentFrame) {
+        return currentFrame.isInitial;
+    }
+}
+
+
+var dependencyDetection = Object.freeze({
+	begin: begin,
+	end: end,
+	registerDependency: registerDependency,
+	ignore: ignore,
+	getDependenciesCount: getDependenciesCount,
+	isInitial: isInitial,
+	ignoreDependencies: ignore
+});
+
+//
+//  Observable values
+//  ---
+//
+var observableLatestValue = createSymbolOrString('_latestValue');
+function observable(initialValue) {
+    function Observable() {
+        if (arguments.length > 0) {
+            // Write
+            // Ignore writes if the value hasn't changed
+            if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {
+                Observable.valueWillMutate();
+                Observable[observableLatestValue] = arguments[0];
+                Observable.valueHasMutated();
+            }
+            return this; // Permits chained assignments
+        }
+        else {
+            // Read
+            registerDependency(Observable); // The caller only needs to be notified of changes if they did a "read" operation
+            return Observable[observableLatestValue];
+        }
+    }
+    Observable[observableLatestValue] = initialValue;
+    // Inherit from 'subscribable'
+    if (!canSetPrototype) {
+        // 'subscribable' won't be on the prototype chain unless we put it there directly
+        extend(Observable, subscribable.fn);
+    }
+    subscribable.fn.init(Observable);
+    // Inherit from 'observable'
+    setPrototypeOfOrExtend(Observable, observable.fn);
+    if (options.deferUpdates) {
+        deferUpdates(Observable);
+    }
+    return Observable;
+}
+// Define prototype for observables
+observable.fn = {
+    equalityComparer: valuesArePrimitiveAndEqual,
+    peek: function () { return this[observableLatestValue]; },
+    valueHasMutated: function () { this.notifySubscribers(this[observableLatestValue]); },
+    valueWillMutate: function () {
+        this.notifySubscribers(this[observableLatestValue], 'beforeChange');
+    },
+    then: function (res, rej) { try {
+        res(this());
+    }
+    catch (e) {
+        rej(e);
+    } }
+};
+// Moved out of "limit" to avoid the extra closure
+function limitNotifySubscribers(value, event) {
+    if (!event || event === defaultEvent) {
+        this._limitChange(value);
+    }
+    else if (event === 'beforeChange') {
+        this._limitBeforeChange(value);
+    }
+    else {
+        this._origNotifySubscribers(value, event);
+    }
+}
+// Add `limit` function to the subscribable prototype
+subscribable.fn.limit = function limit(limitFunction) {
+    var self = this;
+    var selfIsObservable = isObservable(self);
+    var beforeChange = 'beforeChange';
+    var ignoreBeforeChange, previousValue, pendingValue;
+    if (!self._origNotifySubscribers) {
+        self._origNotifySubscribers = self.notifySubscribers;
+        self.notifySubscribers = limitNotifySubscribers;
+    }
+    var finish = limitFunction(function () {
+        self._notificationIsPending = false;
+        // If an observable provided a reference to itself, access it to get the latest value.
+        // This allows computed observables to delay calculating their value until needed.
+        if (selfIsObservable && pendingValue === self) {
+            pendingValue = self();
+        }
+        ignoreBeforeChange = false;
+        if (self.isDifferent(previousValue, pendingValue)) {
+            self._origNotifySubscribers(previousValue = pendingValue);
+        }
+    });
+    self._limitChange = function (value) {
+        self._notificationIsPending = ignoreBeforeChange = true;
+        pendingValue = value;
+        finish();
+    };
+    self._limitBeforeChange = function (value) {
+        if (!ignoreBeforeChange) {
+            previousValue = value;
+            self._origNotifySubscribers(value, beforeChange);
+        }
+    };
+};
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the observable constructor
+if (canSetPrototype) {
+    setPrototypeOf(observable.fn, subscribable.fn);
+}
+var protoProperty$1 = observable.protoProperty = options.protoProperty;
+observable.fn[protoProperty$1] = observable;
+function isObservable(instance) {
+    return hasPrototype(instance, observable);
+}
+function unwrap(value) {
+    return isObservable(value) ? value() : value;
+}
+function peek(value) {
+    return isObservable(value) ? value.peek() : value;
+}
+function isWriteableObservable(instance) {
+    // Observable
+    if ((typeof instance === 'function') && instance[protoProperty$1] === observable) {
+        return true;
+    }
+    // Writeable dependent observable
+    if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {
+        return true;
+    }
+    // Anything else
+    return false;
+}
+
+//
+// Observable Array - Change Tracking Extender
+// ---
+//
+/* eslint no-fallthrough: 0*/
+var arrayChangeEventName = 'arrayChange';
+function trackArrayChanges(target, options$$1) {
+    // Use the provided options--each call to trackArrayChanges overwrites the previously set options
+    target.compareArrayOptions = {};
+    if (options$$1 && typeof options$$1 == "object") {
+        extend(target.compareArrayOptions, options$$1);
+    }
+    target.compareArrayOptions.sparse = true;
+    // Only modify the target observable once
+    if (target.cacheDiffForKnownOperation) {
+        return;
+    }
+    var trackingChanges = false, cachedDiff = null, arrayChangeSubscription, pendingNotifications = 0, underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd, underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;
+    // Watch "subscribe" calls, and for array change events, ensure change tracking is enabled
+    target.beforeSubscriptionAdd = function (event) {
+        if (underlyingBeforeSubscriptionAddFunction)
+            underlyingBeforeSubscriptionAddFunction.call(target, event);
+        if (event === arrayChangeEventName) {
+            trackChanges();
+        }
+    };
+    // Watch "dispose" calls, and for array change events, ensure change tracking is disabled when all are disposed
+    target.afterSubscriptionRemove = function (event) {
+        if (underlyingAfterSubscriptionRemoveFunction)
+            underlyingAfterSubscriptionRemoveFunction.call(target, event);
+        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {
+            if (arrayChangeSubscription) {
+                arrayChangeSubscription.dispose();
+            }
+            arrayChangeSubscription = null;
+            trackingChanges = false;
+        }
+    };
+    function trackChanges() {
+        // Calling 'trackChanges' multiple times is the same as calling it once
+        if (trackingChanges) {
+            return;
+        }
+        trackingChanges = true;
+        // Intercept "notifySubscribers" to track how many times it was called.
+        var underlyingNotifySubscribersFunction = target['notifySubscribers'];
+        target['notifySubscribers'] = function (valueToNotify, event) {
+            if (!event || event === defaultEvent) {
+                ++pendingNotifications;
+            }
+            return underlyingNotifySubscribersFunction.apply(this, arguments);
+        };
+        // Each time the array changes value, capture a clone so that on the next
+        // change it's possible to produce a diff
+        var previousContents = [].concat(target.peek() || []);
+        cachedDiff = null;
+        arrayChangeSubscription = target.subscribe(function (currentContents) {
+            // Make a copy of the current contents and ensure it's an array
+            currentContents = [].concat(currentContents || []);
+            // Compute the diff and issue notifications, but only if someone is listening
+            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {
+                var changes = getChanges(previousContents, currentContents);
+            }
+            // Eliminate references to the old, removed items, so they can be GCed
+            previousContents = currentContents;
+            cachedDiff = null;
+            pendingNotifications = 0;
+            if (changes && changes.length) {
+                target['notifySubscribers'](changes, arrayChangeEventName);
+            }
+        });
+    }
+    function getChanges(previousContents, currentContents) {
+        // We try to re-use cached diffs.
+        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates
+        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,
+        // notifications are issued immediately so we wouldn't be queueing up more than one.
+        if (!cachedDiff || pendingNotifications > 1) {
+            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);
+        }
+        return cachedDiff;
+    }
+    target.cacheDiffForKnownOperation = function (rawArray, operationName, args) {
+        var index, argsIndex;
+        // Only run if we're currently tracking changes for this observable array
+        // and there aren't any pending deferred notifications.
+        if (!trackingChanges || pendingNotifications) {
+            return;
+        }
+        var diff = [], arrayLength = rawArray.length, argsLength = args.length, offset = 0;
+        function pushDiff(status, value, index) {
+            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };
+        }
+        switch (operationName) {
+            case 'push':
+                offset = arrayLength;
+            case 'unshift':
+                for (index = 0; index < argsLength; index++) {
+                    pushDiff('added', args[index], offset + index);
+                }
+                break;
+            case 'pop':
+                offset = arrayLength - 1;
+            case 'shift':
+                if (arrayLength) {
+                    pushDiff('deleted', rawArray[offset], offset);
+                }
+                break;
+            case 'splice':
+                // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].
+                // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice
+                var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength), endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength), endAddIndex = startIndex + argsLength - 2, endIndex = Math.max(endDeleteIndex, endAddIndex), additions = [], deletions = [];
+                for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {
+                    if (index < endDeleteIndex)
+                        deletions.push(pushDiff('deleted', rawArray[index], index));
+                    if (index < endAddIndex)
+                        additions.push(pushDiff('added', args[argsIndex], index));
+                }
+                findMovesInArrayComparison(deletions, additions);
+                break;
+            default:
+                return;
+        }
+        cachedDiff = diff;
+    };
+}
+// Expose compareArrays for testing.
+trackArrayChanges.compareArrays = compareArrays;
+// Add the trackArrayChanges extender so we can use
+// obs.extend({ trackArrayChanges: true })
+extenders.trackArrayChanges = trackArrayChanges;
+
+//
+// Observable Arrays
+// ===
+//
+function observableArray(initialValues) {
+    initialValues = initialValues || [];
+    if (typeof initialValues !== 'object' || !('length' in initialValues)) {
+        throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.');
+    }
+    var result = observable(initialValues);
+    setPrototypeOfOrExtend(result, observableArray.fn);
+    trackArrayChanges(result);
+    // ^== result.extend({ trackArrayChanges: true })
+    return result;
+}
+observableArray.fn = {
+    remove: function (valueOrPredicate) {
+        var underlyingArray = this.peek();
+        var removedValues = [];
+        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
+        for (var i = 0; i < underlyingArray.length; i++) {
+            var value = underlyingArray[i];
+            if (predicate(value)) {
+                if (removedValues.length === 0) {
+                    this.valueWillMutate();
+                }
+                removedValues.push(value);
+                underlyingArray.splice(i, 1);
+                i--;
+            }
+        }
+        if (removedValues.length) {
+            this.valueHasMutated();
+        }
+        return removedValues;
+    },
+    removeAll: function (arrayOfValues) {
+        // If you passed zero args, we remove everything
+        if (arrayOfValues === undefined) {
+            var underlyingArray = this.peek();
+            var allValues = underlyingArray.slice(0);
+            this.valueWillMutate();
+            underlyingArray.splice(0, underlyingArray.length);
+            this.valueHasMutated();
+            return allValues;
+        }
+        // If you passed an arg, we interpret it as an array of entries to remove
+        if (!arrayOfValues) {
+            return [];
+        }
+        return this['remove'](function (value) {
+            return arrayIndexOf(arrayOfValues, value) >= 0;
+        });
+    },
+    destroy: function (valueOrPredicate) {
+        var underlyingArray = this.peek();
+        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };
+        this.valueWillMutate();
+        for (var i = underlyingArray.length - 1; i >= 0; i--) {
+            var value = underlyingArray[i];
+            if (predicate(value)) {
+                underlyingArray[i]['_destroy'] = true;
+            }
+        }
+        this.valueHasMutated();
+    },
+    destroyAll: function (arrayOfValues) {
+        // If you passed zero args, we destroy everything
+        if (arrayOfValues === undefined) {
+            return this.destroy(function () { return true; });
+        }
+        // If you passed an arg, we interpret it as an array of entries to destroy
+        if (!arrayOfValues) {
+            return [];
+        }
+        return this.destroy(function (value) {
+            return arrayIndexOf(arrayOfValues, value) >= 0;
+        });
+    },
+    indexOf: function (item) {
+        var underlyingArray = this();
+        return arrayIndexOf(underlyingArray, item);
+    },
+    replace: function (oldItem, newItem) {
+        var index = this.indexOf(oldItem);
+        if (index >= 0) {
+            this.valueWillMutate();
+            this.peek()[index] = newItem;
+            this.valueHasMutated();
+        }
+    }
+};
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the ko.observableArray constructor
+if (canSetPrototype) {
+    setPrototypeOf(observableArray.fn, observable.fn);
+}
+// Populate ko.observableArray.fn with read/write functions from native arrays
+// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array
+// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale
+arrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+    observableArray.fn[methodName] = function () {
+        // Use "peek" to avoid creating a subscription in any computed that we're executing in the context of
+        // (for consistency with mutating regular observables)
+        var underlyingArray = this.peek();
+        this.valueWillMutate();
+        this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);
+        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);
+        this.valueHasMutated();
+        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.
+        return methodCallResult === underlyingArray ? this : methodCallResult;
+    };
+});
+// Populate ko.observableArray.fn with read-only functions from native arrays
+arrayForEach(['slice'], function (methodName) {
+    observableArray.fn[methodName] = function () {
+        var underlyingArray = this();
+        return underlyingArray[methodName].apply(underlyingArray, arguments);
+    };
+});
+
+//
+// Helpers
+// ---
+// toJS & toJSON
+//
+var maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)
+function toJS(rootObject) {
+    if (arguments.length == 0)
+        throw new Error("When calling ko.toJS, pass the object you want to convert.");
+    // We just unwrap everything at every level in the object graph
+    return mapJsObjectGraph(rootObject, function (valueToMap) {
+        // Loop because an observable's value might in turn be another observable wrapper
+        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)
+            valueToMap = valueToMap();
+        return valueToMap;
+    });
+}
+function toJSON(rootObject, replacer, space) {
+    var plainJavaScriptObject = toJS(rootObject);
+    return stringifyJson(plainJavaScriptObject, replacer, space);
+}
+function mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {
+    visitedObjects = visitedObjects || new objectLookup();
+    rootObject = mapInputCallback(rootObject);
+    var canHaveProperties = (typeof rootObject == "object") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));
+    if (!canHaveProperties)
+        return rootObject;
+    var outputProperties = rootObject instanceof Array ? [] : {};
+    visitedObjects.save(rootObject, outputProperties);
+    visitPropertiesOrArrayEntries(rootObject, function (indexer) {
+        var propertyValue = mapInputCallback(rootObject[indexer]);
+        switch (typeof propertyValue) {
+            case "boolean":
+            case "number":
+            case "string":
+            case "function":
+                outputProperties[indexer] = propertyValue;
+                break;
+            case "object":
+            case "undefined":
+                var previouslyMappedValue = visitedObjects.get(propertyValue);
+                outputProperties[indexer] = (previouslyMappedValue !== undefined)
+                    ? previouslyMappedValue
+                    : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);
+                break;
+        }
+    });
+    return outputProperties;
+}
+function visitPropertiesOrArrayEntries(rootObject, visitorCallback) {
+    if (rootObject instanceof Array) {
+        for (var i = 0; i < rootObject.length; i++)
+            visitorCallback(i);
+        // For arrays, also respect toJSON property for custom mappings (fixes #278)
+        if (typeof rootObject['toJSON'] == 'function')
+            visitorCallback('toJSON');
+    }
+    else {
+        for (var propertyName in rootObject) {
+            visitorCallback(propertyName);
+        }
+    }
+}
+function objectLookup() {
+    this.keys = [];
+    this.values = [];
+}
+objectLookup.prototype = {
+    constructor: objectLookup,
+    save: function (key, value) {
+        var existingIndex = arrayIndexOf(this.keys, key);
+        if (existingIndex >= 0)
+            this.values[existingIndex] = value;
+        else {
+            this.keys.push(key);
+            this.values.push(value);
+        }
+    },
+    get: function (key) {
+        var existingIndex = arrayIndexOf(this.keys, key);
+        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;
+    }
+};
+
+//
+// Computed Observable Values
+//
+// (before tko, `computed` was also known as `dependentObservable`)
+//
+var computedState = createSymbolOrString('_state');
+function computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {
+    if (typeof evaluatorFunctionOrOptions === 'object') {
+        // Single-parameter syntax - everything is on this "options" param
+        options$$1 = evaluatorFunctionOrOptions;
+    }
+    else {
+        // Multi-parameter syntax - construct the options according to the params passed
+        options$$1 = options$$1 || {};
+        if (evaluatorFunctionOrOptions) {
+            options$$1.read = evaluatorFunctionOrOptions;
+        }
+    }
+    if (typeof options$$1.read !== 'function') {
+        throw Error('Pass a function that returns the value of the computed');
+    }
+    var writeFunction = options$$1.write;
+    var state = {
+        latestValue: undefined,
+        isStale: true,
+        isBeingEvaluated: false,
+        suppressDisposalUntilDisposeWhenReturnsFalse: false,
+        isDisposed: false,
+        pure: false,
+        isSleeping: false,
+        readFunction: options$$1.read,
+        evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,
+        disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,
+        disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,
+        domNodeDisposalCallback: null,
+        dependencyTracking: {},
+        dependenciesCount: 0,
+        evaluationTimeoutInstance: null
+    };
+    function computedObservable() {
+        if (arguments.length > 0) {
+            if (typeof writeFunction === 'function') {
+                // Writing a value
+                writeFunction.apply(state.evaluatorFunctionTarget, arguments);
+            }
+            else {
+                throw new Error("Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.");
+            }
+            return this; // Permits chained assignments
+        }
+        else {
+            // Reading the value
+            dependencyDetection.registerDependency(computedObservable);
+            if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {
+                computedObservable.evaluateImmediate();
+            }
+            return state.latestValue;
+        }
+    }
+    computedObservable[computedState] = state;
+    computedObservable.hasWriteFunction = typeof writeFunction === 'function';
+    // Inherit from 'subscribable'
+    if (!canSetPrototype) {
+        // 'subscribable' won't be on the prototype chain unless we put it there directly
+        extend(computedObservable, subscribable.fn);
+    }
+    subscribable.fn.init(computedObservable);
+    // Inherit from 'computed'
+    setPrototypeOfOrExtend(computedObservable, computed.fn);
+    if (options$$1.pure) {
+        state.pure = true;
+        state.isSleeping = true; // Starts off sleeping; will awake on the first subscription
+        extend(computedObservable, pureComputedOverrides);
+    }
+    else if (options$$1.deferEvaluation) {
+        extend(computedObservable, deferEvaluationOverrides);
+    }
+    if (options.deferUpdates) {
+        extenders.deferred(computedObservable, true);
+    }
+    if (options.debug) {
+        // #1731 - Aid debugging by exposing the computed's options
+        computedObservable._options = options$$1;
+    }
+    if (state.disposeWhenNodeIsRemoved) {
+        // Since this computed is associated with a DOM node, and we don't want to dispose the computed
+        // until the DOM node is *removed* from the document (as opposed to never having been in the document),
+        // we'll prevent disposal until "disposeWhen" first returns false.
+        state.suppressDisposalUntilDisposeWhenReturnsFalse = true;
+        // disposeWhenNodeIsRemoved: true can be used to opt into the "only dispose after first false result"
+        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try
+        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't
+        // be documented or used by application code, as it's likely to change in a future version of KO.
+        if (!state.disposeWhenNodeIsRemoved.nodeType) {
+            state.disposeWhenNodeIsRemoved = null;
+        }
+    }
+    // Evaluate, unless sleeping or deferEvaluation is true
+    if (!state.isSleeping && !options$$1.deferEvaluation) {
+        computedObservable.evaluateImmediate();
+    }
+    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is
+    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).
+    if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {
+        addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {
+            computedObservable.dispose();
+        });
+    }
+    return computedObservable;
+}
+// Utility function that disposes a given dependencyTracking entry
+function computedDisposeDependencyCallback(id, entryToDispose) {
+    if (entryToDispose !== null && entryToDispose.dispose) {
+        entryToDispose.dispose();
+    }
+}
+// This function gets called each time a dependency is detected while evaluating a computed.
+// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.
+function computedBeginDependencyDetectionCallback(subscribable$$1, id) {
+    var computedObservable = this.computedObservable, state = computedObservable[computedState];
+    if (!state.isDisposed) {
+        if (this.disposalCount && this.disposalCandidates[id]) {
+            // Don't want to dispose this subscription, as it's still being used
+            computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);
+            this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway
+            --this.disposalCount;
+        }
+        else if (!state.dependencyTracking[id]) {
+            // Brand new subscription - add it
+            computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));
+        }
+    }
+}
+computed.fn = {
+    equalityComparer: valuesArePrimitiveAndEqual,
+    getDependenciesCount: function () {
+        return this[computedState].dependenciesCount;
+    },
+    addDependencyTracking: function (id, target, trackingObj) {
+        if (this[computedState].pure && target === this) {
+            throw Error("A 'pure' computed must not be called recursively");
+        }
+        this[computedState].dependencyTracking[id] = trackingObj;
+        trackingObj._order = this[computedState].dependenciesCount++;
+        trackingObj._version = target.getVersion();
+    },
+    haveDependenciesChanged: function () {
+        var id, dependency, dependencyTracking = this[computedState].dependencyTracking;
+        for (id in dependencyTracking) {
+            if (dependencyTracking.hasOwnProperty(id)) {
+                dependency = dependencyTracking[id];
+                if (dependency._target.hasChanged(dependency._version)) {
+                    return true;
+                }
+            }
+        }
+    },
+    markDirty: function () {
+        // Process "dirty" events if we can handle delayed notifications
+        if (this._evalDelayed && !this[computedState].isBeingEvaluated) {
+            this._evalDelayed();
+        }
+    },
+    isActive: function () {
+        return this[computedState].isStale || this[computedState].dependenciesCount > 0;
+    },
+    respondToChange: function () {
+        // Ignore "change" events if we've already scheduled a delayed notification
+        if (!this._notificationIsPending) {
+            this.evaluatePossiblyAsync();
+        }
+    },
+    subscribeToDependency: function (target) {
+        if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {
+            var dirtySub = target.subscribe(this.markDirty, this, 'dirty'), changeSub = target.subscribe(this.respondToChange, this);
+            return {
+                _target: target,
+                dispose: function () {
+                    dirtySub.dispose();
+                    changeSub.dispose();
+                }
+            };
+        }
+        else {
+            return target.subscribe(this.evaluatePossiblyAsync, this);
+        }
+    },
+    evaluatePossiblyAsync: function () {
+        var computedObservable = this, throttleEvaluationTimeout = computedObservable.throttleEvaluation;
+        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {
+            clearTimeout(this[computedState].evaluationTimeoutInstance);
+            this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {
+                computedObservable.evaluateImmediate(true /* notifyChange */);
+            }, throttleEvaluationTimeout);
+        }
+        else if (computedObservable._evalDelayed) {
+            computedObservable._evalDelayed();
+        }
+        else {
+            computedObservable.evaluateImmediate(true /* notifyChange */);
+        }
+    },
+    evaluateImmediate: function (notifyChange) {
+        var computedObservable = this, state = computedObservable[computedState], disposeWhen = state.disposeWhen;
+        if (state.isBeingEvaluated) {
+            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.
+            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost
+            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing
+            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387
+            return;
+        }
+        // Do not evaluate (and possibly capture new dependencies) if disposed
+        if (state.isDisposed) {
+            return;
+        }
+        if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {
+            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse
+            if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {
+                computedObservable.dispose();
+                return;
+            }
+        }
+        else {
+            // It just did return false, so we can stop suppressing now
+            state.suppressDisposalUntilDisposeWhenReturnsFalse = false;
+        }
+        state.isBeingEvaluated = true;
+        try {
+            this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);
+        }
+        finally {
+            state.isBeingEvaluated = false;
+        }
+        if (!state.dependenciesCount) {
+            computedObservable.dispose();
+        }
+    },
+    evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {
+        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.
+        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,
+        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).
+        var computedObservable = this, state = computedObservable[computedState];
+        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).
+        // Then, during evaluation, we cross off any that are in fact still being used.
+        var isInitial = state.pure ? undefined : !state.dependenciesCount, // If we're evaluating when there are no previous dependencies, it must be the first time
+        dependencyDetectionContext = {
+            computedObservable: computedObservable,
+            disposalCandidates: state.dependencyTracking,
+            disposalCount: state.dependenciesCount
+        };
+        dependencyDetection.begin({
+            callbackTarget: dependencyDetectionContext,
+            callback: computedBeginDependencyDetectionCallback,
+            computed: computedObservable,
+            isInitial: isInitial
+        });
+        state.dependencyTracking = {};
+        state.dependenciesCount = 0;
+        var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);
+        if (computedObservable.isDifferent(state.latestValue, newValue)) {
+            if (!state.isSleeping) {
+                computedObservable.notifySubscribers(state.latestValue, 'beforeChange');
+            }
+            state.latestValue = newValue;
+            if (state.isSleeping) {
+                computedObservable.updateVersion();
+            }
+            else if (notifyChange) {
+                computedObservable.notifySubscribers(state.latestValue);
+            }
+        }
+        if (isInitial) {
+            computedObservable.notifySubscribers(state.latestValue, 'awake');
+        }
+    },
+    evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {
+        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.
+        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection
+        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU
+        // overhead of computed evaluation (on V8 at least).
+        try {
+            var readFunction = state.readFunction;
+            return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();
+        }
+        finally {
+            dependencyDetection.end();
+            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it
+            if (dependencyDetectionContext.disposalCount && !state.isSleeping) {
+                objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);
+            }
+            state.isStale = false;
+        }
+    },
+    peek: function () {
+        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when "deferEvaluation" is set.
+        var state = this[computedState];
+        if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {
+            this.evaluateImmediate();
+        }
+        return state.latestValue;
+    },
+    limit: function (limitFunction) {
+        // Override the limit function with one that delays evaluation as well
+        subscribable.fn.limit.call(this, limitFunction);
+        this._evalDelayed = function () {
+            this._limitBeforeChange(this[computedState].latestValue);
+            this[computedState].isStale = true; // Mark as dirty
+            // Pass the observable to the "limit" code, which will access it when
+            // it's time to do the notification.
+            this._limitChange(this);
+        };
+    },
+    dispose: function () {
+        var state = this[computedState];
+        if (!state.isSleeping && state.dependencyTracking) {
+            objectForEach(state.dependencyTracking, function (id, dependency) {
+                if (dependency.dispose) {
+                    dependency.dispose();
+                }
+            });
+        }
+        if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {
+            removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);
+        }
+        state.dependencyTracking = null;
+        state.dependenciesCount = 0;
+        state.isDisposed = true;
+        state.isStale = false;
+        state.isSleeping = false;
+        state.disposeWhenNodeIsRemoved = null;
+        state.readFunction = null;
+        if (options.debug) {
+            this._options = null;
+        }
+    }
+};
+var pureComputedOverrides = {
+    beforeSubscriptionAdd: function (event) {
+        // If asleep, wake up the computed by subscribing to any dependencies.
+        var computedObservable = this, state = computedObservable[computedState];
+        if (!state.isDisposed && state.isSleeping && event == 'change') {
+            state.isSleeping = false;
+            if (state.isStale || computedObservable.haveDependenciesChanged()) {
+                state.dependencyTracking = null;
+                state.dependenciesCount = 0;
+                state.isStale = true;
+                computedObservable.evaluateImmediate();
+            }
+            else {
+                // First put the dependencies in order
+                var dependeciesOrder = [];
+                objectForEach(state.dependencyTracking, function (id, dependency) {
+                    dependeciesOrder[dependency._order] = id;
+                });
+                // Next, subscribe to each one
+                arrayForEach(dependeciesOrder, function (id, order) {
+                    var dependency = state.dependencyTracking[id], subscription = computedObservable.subscribeToDependency(dependency._target);
+                    subscription._order = order;
+                    subscription._version = dependency._version;
+                    state.dependencyTracking[id] = subscription;
+                });
+            }
+            if (!state.isDisposed) {
+                computedObservable.notifySubscribers(state.latestValue, 'awake');
+            }
+        }
+    },
+    afterSubscriptionRemove: function (event) {
+        var state = this[computedState];
+        if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {
+            objectForEach(state.dependencyTracking, function (id, dependency) {
+                if (dependency.dispose) {
+                    state.dependencyTracking[id] = {
+                        _target: dependency._target,
+                        _order: dependency._order,
+                        _version: dependency._version
+                    };
+                    dependency.dispose();
+                }
+            });
+            state.isSleeping = true;
+            this.notifySubscribers(undefined, 'asleep');
+        }
+    },
+    getVersion: function () {
+        // Because a pure computed is not automatically updated while it is sleeping, we can't
+        // simply return the version number. Instead, we check if any of the dependencies have
+        // changed and conditionally re-evaluate the computed observable.
+        var state = this[computedState];
+        if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {
+            this.evaluateImmediate();
+        }
+        return subscribable.fn.getVersion.call(this);
+    }
+};
+var deferEvaluationOverrides = {
+    beforeSubscriptionAdd: function (event) {
+        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.
+        if (event == 'change' || event == 'beforeChange') {
+            this.peek();
+        }
+    }
+};
+// Note that for browsers that don't support proto assignment, the
+// inheritance chain is created manually in the ko.computed constructor
+if (canSetPrototype) {
+    setPrototypeOf(computed.fn, subscribable.fn);
+}
+// Set the proto chain values for ko.hasPrototype
+var protoProp = observable.protoProperty; // == "__ko_proto__"
+computed[protoProp] = observable;
+computed.fn[protoProp] = computed;
+function isComputed(instance) {
+    return hasPrototype(instance, computed);
+}
+function isPureComputed(instance) {
+    return hasPrototype(instance, computed)
+        && instance[computedState] && instance[computedState].pure;
+}
+function pureComputed(evaluatorFunctionOrOptions, evaluatorFunctionTarget) {
+    if (typeof evaluatorFunctionOrOptions === 'function') {
+        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, { 'pure': true });
+    }
+    else {
+        evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions); // make a copy of the parameter object
+        evaluatorFunctionOrOptions.pure = true;
+        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget);
+    }
+}
+
+function throttleExtender(target, timeout) {
+    // Throttling means two things:
+    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies
+    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate
+    target.throttleEvaluation = timeout;
+    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*
+    //     so the target cannot change value synchronously or faster than a certain rate
+    var writeTimeoutInstance = null;
+    return computed({
+        read: target,
+        write: function (value) {
+            clearTimeout(writeTimeoutInstance);
+            writeTimeoutInstance = setTimeout(function () {
+                target(value);
+            }, timeout);
+        }
+    });
+}
+extenders.throttle = throttleExtender;
+
+function LAMBDA() { }
+/**
+ * @ operator - recursively call the identifier if it's a function
+ * @param  {operand} a ignored
+ * @param  {operand} b The variable to be called (if a function) and unwrapped
+ * @return {value}   The result.
+ */
+function unwrapOrCall(a, b) {
+    while (typeof b === 'function') {
+        b = b();
+    }
+    return b;
+}
+var operators = {
+    // unary
+    '@': unwrapOrCall,
+    '#': function (a, b) { return function () { return unwrap(b); }; },
+    '=>': LAMBDA,
+    '!': function not(a, b) { return !b; },
+    '!!': function notnot(a, b) { return !!b; },
+    '++': function preinc(a, b) { return ++b; },
+    '--': function preinc(a, b) { return --b; },
+    // mul/div
+    '*': function mul(a, b) { return a * b; },
+    '/': function div(a, b) { return a / b; },
+    '%': function mod(a, b) { return a % b; },
+    // sub/add
+    '+': function add(a, b) { return a + b; },
+    '-': function sub(a, b) { return (a || 0) - (b || 0); },
+    '&-': function neg(a, b) { return -1 * b; },
+    // relational
+    '<': function lt(a, b) { return a < b; },
+    '<=': function le(a, b) { return a <= b; },
+    '>': function gt(a, b) { return a > b; },
+    '>=': function ge(a, b) { return a >= b; },
+    //    TODO: 'in': function (a, b) { return a in b; },
+    //    TODO: 'instanceof': function (a, b) { return a instanceof b; },
+    // equality
+    '==': function equal(a, b) { return a === b; },
+    '!=': function ne(a, b) { return a !== b; },
+    '===': function sequal(a, b) { return a === b; },
+    '!==': function sne(a, b) { return a !== b; },
+    // bitwise
+    '&': function bitAnd(a, b) { return a & b; },
+    '^': function xor(a, b) { return a ^ b; },
+    '|': function bitOr(a, b) { return a | b; },
+    // logic
+    '&&': function logicAnd(a, b) { return a && b; },
+    '||': function logicOr(a, b) { return a || b; },
+    // Access
+    '.': function member(a, b) { return a[b]; },
+    '[': function member(a, b) { return a[b]; },
+    // conditional/ternary
+    // '?': ternary See Node.js
+    // Function-Call
+    'call': function callOp(a, b) { return a.apply(null, b); }
+};
+/* Order of precedence from:
+https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table
+*/
+// Our operator - unwrap/call
+operators['@'].precedence = 21;
+operators['#'].precedence = 21;
+// lambda
+operators['=>'].precedence = 20;
+// Member
+operators['.'].precedence = 19;
+operators['['].precedence = 19;
+// Logical not
+operators['!'].precedence = 16;
+operators['!!'].precedence = 16; // explicit double-negative
+// Prefix inc/dec
+operators['++'].precedence = 16;
+operators['--'].precedence = 16;
+operators['&-'].precedence = 16;
+// mul/div/remainder
+operators['%'].precedence = 14;
+operators['*'].precedence = 14;
+operators['/'].precedence = 14;
+// add/sub
+operators['+'].precedence = 13;
+operators['-'].precedence = 13;
+// bitwise
+operators['|'].precedence = 12;
+operators['^'].precedence = 11;
+operators['&'].precedence = 10;
+// comparison
+operators['<'].precedence = 11;
+operators['<='].precedence = 11;
+operators['>'].precedence = 11;
+operators['>='].precedence = 11;
+// operators['in'].precedence = 8;
+// operators['instanceof'].precedence = 8;
+// equality
+operators['=='].precedence = 10;
+operators['!='].precedence = 10;
+operators['==='].precedence = 10;
+operators['!=='].precedence = 10;
+// logic
+operators['&&'].precedence = 6;
+operators['||'].precedence = 5;
+operators['&&'].earlyOut = function (a) { return !a; };
+operators['||'].earlyOut = function (a) { return a; };
+// Call a function
+operators['call'].precedence = 1;
+
+var IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');
+var Node = /** @class */ (function () {
+    function Node(lhs, op, rhs) {
+        this.lhs = lhs;
+        this.op = op;
+        this.rhs = rhs;
+    }
+    Object.defineProperty(Node, "operators", {
+        get: function () { return operators; },
+        enumerable: true,
+        configurable: true
+    });
+    Node.prototype.get_leaf_value = function (leaf, context, globals, node) {
+        if (typeof leaf === 'function') {
+            // Expressions on observables are nonsensical, so we unwrap any
+            // function values (e.g. identifiers).
+            return unwrap(leaf());
+        }
+        // primitives
+        if (typeof leaf !== 'object' || leaf === null) {
+            return leaf;
+        }
+        // Identifiers and Expressions
+        if (leaf[Node.isExpressionOrIdentifierSymbol]) {
+            // lhs is passed in as the parent of the leaf. It will be defined in
+            // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.
+            return unwrap(leaf.get_value(undefined, context, globals, node));
+        }
+        // Plain object/class.
+        return leaf;
+    };
+    /**
+     * Return a function that calculates and returns an expression's value
+     * when called.
+     * @param  {array} ops  The operations to perform
+     * @return {function}   The function that calculates the expression.
+     *
+     * Note that for a lambda, we do not evaluate the RHS expression until
+     * the lambda is called.
+     */
+    Node.prototype.get_value = function (notused, context, globals, node) {
+        var node = this;
+        if (node.op === LAMBDA) {
+            return function () { return node.get_leaf_value(node.rhs, context, globals, node); };
+        }
+        var lhv = node.get_leaf_value(node.lhs, context, globals, node);
+        var earlyOut = node.op.earlyOut;
+        if (earlyOut && earlyOut(lhv)) {
+            return lhv;
+        }
+        var rhv = node.get_leaf_value(node.rhs, context, globals, node);
+        return node.op(lhv, rhv, context, globals);
+    };
+    Object.defineProperty(Node, "isExpressionOrIdentifierSymbol", {
+        //
+        // Class variables.
+        //
+        get: function () { return IS_EXPR_OR_IDENT; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(Node.prototype, IS_EXPR_OR_IDENT, {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Node.value_of = function (item, context, globals, node) {
+        if (item && item[Node.isExpressionOrIdentifierSymbol]) {
+            return item.get_value(item, context, globals, node);
+        }
+        return item;
+    };
+    /**
+    *  Convert an array of nodes to an executable tree.
+    *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding
+    *                      to the left hand side, right hand side, and
+    *                      operation function.
+    */
+    Node.create_root = function (nodes) {
+        var root, leaf, op, value;
+        // Prime the leaf = root node.
+        leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());
+        while (true) {
+            op = nodes.shift();
+            value = nodes.shift();
+            if (!op) {
+                break;
+            }
+            if (op.precedence < root.op.precedence) {
+                // rebase
+                root = new Node(root, op, value);
+                leaf = root;
+            }
+            else {
+                leaf.rhs = new Node(leaf.rhs, op, value);
+                leaf = leaf.rhs;
+            }
+        }
+        // console.log('tree', root)
+        return root;
+    };
+    return Node;
+}());
+/**
+ * Because of cyclical dependencies on operators <-> Node <-> value_of,
+ * we need to patch this in here.
+ */
+operators['?'] = function ternary(a, b, context, globals, node) {
+    return Node.value_of(a ? b.yes : b.no, context, globals, node);
+};
+operators['?'].precedence = 4;
+
+var Expression = /** @class */ (function () {
+    function Expression(nodes) {
+        this.nodes = nodes;
+        this.root = Node.create_root(nodes);
+    }
+    /**
+     * Return the value of `this` Expression instance.
+     */
+    Expression.prototype.get_value = function (parent, context, globals, node) {
+        if (!this.root) {
+            this.root = Node.create_root(this.nodes);
+        }
+        return this.root.get_value(parent, context, globals, node);
+    };
+    return Expression;
+}());
+Expression.prototype[Node.isExpressionOrIdentifierSymbol] = true;
+
+var Arguments = /** @class */ (function () {
+    function Arguments(parser, args) {
+        this.parser = parser;
+        this.args = args;
+    }
+    Arguments.prototype.get_value = function (parent, context, globals, node) {
+        var deReffedArgs = [];
+        for (var i = 0, j = this.args.length; i < j; ++i) {
+            deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));
+        }
+        return deReffedArgs;
+    };
+    
+    Object.defineProperty(Arguments.prototype, Node.isExpressionOrIdentifierSymbol, {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return Arguments;
+}());
+
+/**
+ * The following regular expressions were generated by
+ *  https://mathiasbynens.be/demo/javascript-identifier-regex
+ */
+var IDStart = /[\$A-Z_a-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/;
+var IDContinue = 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+
+var Identifier = /** @class */ (function () {
+    function Identifier(parser, token, dereferences) {
+        this.token = token;
+        this.dereferences = dereferences;
+        this.parser = parser;
+    }
+    /**
+     * Apply all () and [] functions on the identifier to the lhs value e.g.
+     * a()[3] has deref functions that are essentially this:
+     *     [_deref_call, _deref_this where this=3]
+     *
+     * @param  {mixed} value  Should be an object.
+     * @return {mixed}        The dereferenced value.
+     *
+     * [1] We want to bind any function that is a method of an object, but not
+     *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where
+     *     we're given `data-bind='binding: obj.x'` and x is a computed will
+     *     break the computed's `this` and it will stop working as expected.
+     *
+     *     The test `!last_value.hasOwnProperty(member)`
+     *     distinguishes between functions on the prototype chain (prototypal
+     *     members) and value-members added directly to the object.  This may
+     *     not be the canonical test for this relationship, but it succeeds
+     *     in the known test cases.
+     *
+     *     See: `this` tests of our dereference function.
+     */
+    Identifier.prototype.dereference = function (value, $context, globals, node) {
+        var member;
+        var refs = this.dereferences || [];
+        var $data = $context.$data || {};
+        var lastValue; // becomes `this` in function calls to object properties.
+        var i, n;
+        for (i = 0, n = refs.length; i < n; ++i) {
+            member = Node.value_of(refs[i], $context, globals, node);
+            if (typeof value === 'function' && refs[i] instanceof Arguments) {
+                // fn(args)
+                value = value.apply(lastValue || $data, member);
+                lastValue = value;
+            }
+            else {
+                // obj[x] or obj.x dereference.  Note that obj may be a function.
+                lastValue = value;
+                value = Node.value_of(value[member], $context, globals, node);
+            }
+        }
+        // [1] See note above.
+        if (typeof value === 'function' && n > 0 && lastValue !== value &&
+            !lastValue.hasOwnProperty(member)) {
+            return value.bind(lastValue);
+        }
+        return value;
+    };
+    
+    /**
+     * Return the value as one would get it from the top-level i.e.
+     * $data.token/$context.token/globals.token; this does not return intermediate
+     * values on a chain of members i.e. $data.hello.there -- requesting the
+     * Identifier('there').value will return $data/$context/globals.there.
+     *
+     * This will dereference using () or [arg] member.
+     * @param  {object | Identifier | Expression} parent
+     * @return {mixed}  Return the primitive or an accessor.
+     */
+    Identifier.prototype.get_value = function (parent, context, globals, node) {
+        var intermediate = parent && !(parent instanceof Identifier)
+            ? Node.value_of(parent, context, globals, node)[this.token]
+            : context.lookup(this.token, globals, node);
+        return this.dereference(intermediate, context, globals, node);
+    };
+    Identifier.prototype.assign = function (object, property, value) {
+        if (isWriteableObservable(object[property])) {
+            object[property](value);
+        }
+        else if (!isObservable(object[property])) {
+            object[property] = value;
+        }
+    };
+    
+    /**
+     * Set the value of the Identifier.
+     *
+     * @param {Mixed} new_value The value that Identifier is to be set to.
+     */
+    Identifier.prototype.set_value = function (new_value, $context, globals) {
+        var $data = $context.$data || {};
+        var refs = this.dereferences || [];
+        var leaf = this.token;
+        var i, n, root;
+        if (Object.hasOwnProperty.call($data, leaf)) {
+            root = $data;
+        }
+        else if (Object.hasOwnProperty.call($context, leaf)) {
+            root = $context;
+        }
+        else if (Object.hasOwnProperty.call(globals, leaf)) {
+            root = globals;
+        }
+        else {
+            throw new Error('Identifier::set_value -- ' +
+                "The property '" + leaf + "' does not exist " +
+                'on the $data, $context, or globals.');
+        }
+        // Degenerate case. {$data|$context|global}[leaf] = something;
+        n = refs.length;
+        if (n === 0) {
+            this.assign(root, leaf, new_value);
+            return;
+        }
+        // First dereference is {$data|$context|global}[token].
+        root = root[leaf];
+        // We cannot use this.dereference because that gives the leaf; to evoke
+        // the ES5 setter we have to call `obj[leaf] = new_value`
+        for (i = 0; i < n - 1; ++i) {
+            leaf = refs[i];
+            if (leaf instanceof Arguments) {
+                root = root();
+            }
+            else {
+                root = root[Node.value_of(leaf)];
+            }
+        }
+        // We indicate that a dereference is a function when it is `true`.
+        if (refs[i] === true) {
+            throw new Error('Cannot assign a value to a function.');
+        }
+        // Call the setter for the leaf.
+        if (refs[i]) {
+            this.assign(root, Node.value_of(refs[i]), new_value);
+        }
+    };
+    
+    /**
+     * Determine if a character is a valid item in an identifier.
+     * Note that we do not check whether the first item is a number, nor do we
+     * support unicode identifiers here.
+     *
+     * From:  http://stackoverflow.com/a/9337047
+     * @param  {String}  ch  The character
+     * @return {Boolean}     True if this is a valid identifier
+     */
+    // function is_identifier_char(ch) {
+    //   return (ch >= 'A' && ch <= 'Z') ||
+    //          (ch >= 'a' && ch <= 'z') ||
+    //          (ch >= '0' && ch <= 9) ||
+    //           ch === '_' || ch === '$';
+    // }
+    Identifier.is_valid_start_char = function (ch) {
+        return IDStart.test(ch);
+    };
+    Identifier.is_valid_continue_char = function (ch) {
+        return IDContinue.test(ch);
+    };
+    Object.defineProperty(Identifier.prototype, Node.isExpressionOrIdentifierSymbol, {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return Identifier;
+}());
+
+var Ternary = /** @class */ (function () {
+    function Ternary(yes, no) {
+        Object.assign(this, { yes: yes, no: no });
+    }
+    Ternary.prototype.get_value = function () { return this; };
+    Object.defineProperty(Ternary.prototype, Node.isExpressionOrIdentifierSymbol, {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return Ternary;
+}());
+
+/**
+ * Originally based on (public domain):
+ * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js
+ */
+var escapee = {
+    "'": "'",
+    '"': '"',
+    '`': '`',
+    '\\': '\\',
+    '/': '/',
+    '$': '$',
+    b: '\b',
+    f: '\f',
+    n: '\n',
+    r: '\r',
+    t: '\t'
+};
+/**
+ * Construct a new Parser instance with new Parser(node, context)
+ * @param {Node} node    The DOM element from which we parsed the
+ *                         content.
+ * @param {object} context The Knockout context.
+ * @param {object} globals An object containing any desired globals.
+ */
+var Parser = /** @class */ (function () {
+    function Parser() {
+    }
+    Parser.prototype.white = function () {
+        var ch = this.ch;
+        while (ch && ch <= ' ') {
+            ch = this.next();
+        }
+        return this.comment(ch);
+    };
+    /**
+     * Slurp any C or C++ style comments
+     */
+    Parser.prototype.comment = function (ch) {
+        if (ch !== '/') {
+            return ch;
+        }
+        var p = this.at;
+        var second = this.lookahead();
+        if (second === '/') {
+            while (ch) {
+                ch = this.next();
+                if (ch === '\n' || ch === '\r') {
+                    break;
+                }
+            }
+            ch = this.next();
+        }
+        else if (second === '*') {
+            while (ch) {
+                ch = this.next();
+                if (ch === '*' && this.lookahead() === '/') {
+                    this.next();
+                    break;
+                }
+            }
+            if (!ch) {
+                this.error('Unclosed comment, starting at character ' + p);
+            }
+            this.next();
+            return this.white();
+        }
+        return ch;
+    };
+    
+    Parser.prototype.next = function (c) {
+        if (c && c !== this.ch) {
+            this.error("Expected '" + c + "' but got '" + this.ch + "'");
+        }
+        this.ch = this.text.charAt(this.at);
+        this.at += 1;
+        return this.ch;
+    };
+    Parser.prototype.lookahead = function () {
+        return this.text[this.at];
+    };
+    Parser.prototype.error = function (m) {
+        if (m instanceof Error) {
+            throw m;
+        }
+        var _a = m.name ? [m.name, m.message] : [m, ''], name = _a[0], msg = _a[1];
+        var message = "\n" + name + " " + msg + " of\n    " + this.text + "\n" + Array(this.at).join(' ') + '_/ 🔥 \\_\n';
+        throw new Error(message);
+    };
+    Parser.prototype.name = function () {
+        // A name of a binding
+        var name = '';
+        var enclosedBy;
+        this.white();
+        var ch = this.ch;
+        if (ch === "'" || ch === '"') {
+            enclosedBy = ch;
+            ch = this.next();
+        }
+        while (ch) {
+            if (enclosedBy && ch === enclosedBy) {
+                this.white();
+                ch = this.next();
+                if (ch !== ':' && ch !== ',') {
+                    this.error('Object name: ' + name + ' missing closing ' + enclosedBy);
+                }
+                return name;
+            }
+            else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {
+                return name;
+            }
+            name += ch;
+            ch = this.next();
+        }
+        return name;
+    };
+    Parser.prototype.number = function () {
+        var number;
+        var string = '';
+        var ch = this.ch;
+        if (ch === '-') {
+            string = '-';
+            ch = this.next('-');
+        }
+        while (ch >= '0' && ch <= '9') {
+            string += ch;
+            ch = this.next();
+        }
+        if (ch === '.') {
+            string += '.';
+            ch = this.next();
+            while (ch && ch >= '0' && ch <= '9') {
+                string += ch;
+                ch = this.next();
+            }
+        }
+        if (ch === 'e' || ch === 'E') {
+            string += ch;
+            ch = this.next();
+            if (ch === '-' || ch === '+') {
+                string += ch;
+                ch = this.next();
+            }
+            while (ch >= '0' && ch <= '9') {
+                string += ch;
+                ch = this.next();
+            }
+        }
+        number = +string;
+        if (!isFinite(number)) {
+            options.onError(new Error('Bad number: ' + number + ' in ' + string));
+        }
+        else {
+            return number;
+        }
+    };
+    /**
+     * Add a property to 'object' that equals the given value.
+     * @param  {Object} object The object to add the value to.
+     * @param  {String} key    object[key] is set to the given value.
+     * @param  {mixed}  value  The value, may be a primitive or a function. If a
+     *                         function it is unwrapped as a property.
+     */
+    Parser.prototype.objectAddValue = function (object, key, value) {
+        var _this = this;
+        if (value && value[Node.isExpressionOrIdentifierSymbol]) {
+            Object.defineProperty(object, key, {
+                get: function () { return Node.value_of.apply(Node, [value].concat(_this.currentContextGlobals)); },
+                enumerable: true
+            });
+        }
+        else if (Array.isArray(value)) {
+            Object.defineProperty(object, key, {
+                get: function () { return value.map(function (v) { return Node.value_of.apply(Node, [v].concat(_this.currentContextGlobals)); }); },
+                enumerable: true
+            });
+        }
+        else {
+            // primitives
+            object[key] = value;
+        }
+    };
+    Parser.prototype.object = function () {
+        var key;
+        var object = {};
+        var ch = this.ch;
+        if (ch === '{') {
+            this.next('{');
+            ch = this.white();
+            if (ch === '}') {
+                ch = this.next('}');
+                return object;
+            }
+            while (ch) {
+                if (ch === '"' || ch === "'" || ch === '`') {
+                    key = this.string();
+                }
+                else {
+                    key = this.name();
+                }
+                this.white();
+                ch = this.next(':');
+                if (Object.hasOwnProperty.call(object, key)) {
+                    this.error('Duplicate key "' + key + '"');
+                }
+                this.objectAddValue(object, key, this.expression());
+                ch = this.white();
+                if (ch === '}') {
+                    ch = this.next('}');
+                    return object;
+                }
+                this.next(',');
+                ch = this.white();
+            }
+        }
+        this.error('Bad object');
+    };
+    /**
+     * Read up to delim and return the string
+     * @param  {string} delim The delimiter, either ' or "
+     * @return {string}       The string read.
+     */
+    Parser.prototype.readString = function (delim) {
+        var string = '';
+        var nodes = [''];
+        var plusOp = operators['+'];
+        var hex;
+        var i;
+        var uffff;
+        var interpolate = delim === '`';
+        var ch = this.next();
+        while (ch) {
+            if (ch === delim) {
+                ch = this.next();
+                if (interpolate) {
+                    nodes.push(plusOp);
+                }
+                nodes.push(string);
+                return nodes;
+            }
+            if (ch === '\\') {
+                ch = this.next();
+                if (ch === 'u') {
+                    uffff = 0;
+                    for (i = 0; i < 4; i += 1) {
+                        hex = parseInt(ch = this.next(), 16);
+                        if (!isFinite(hex)) {
+                            break;
+                        }
+                        uffff = uffff * 16 + hex;
+                    }
+                    string += String.fromCharCode(uffff);
+                }
+                else if (typeof escapee[ch] === 'string') {
+                    string += escapee[ch];
+                }
+                else {
+                    break;
+                }
+            }
+            else if (interpolate && ch === '$') {
+                ch = this.next();
+                if (ch === '{') {
+                    this.next('{');
+                    nodes.push(plusOp);
+                    nodes.push(string);
+                    nodes.push(plusOp);
+                    nodes.push(this.expression());
+                    string = '';
+                    // this.next('}');
+                }
+                else {
+                    string += '$' + ch;
+                }
+            }
+            else {
+                string += ch;
+            }
+            ch = this.next();
+        }
+        this.error('Bad string');
+    };
+    Parser.prototype.string = function () {
+        var ch = this.ch;
+        if (ch === '"') {
+            return this.readString('"').join('');
+        }
+        else if (ch === "'") {
+            return this.readString("'").join('');
+        }
+        else if (ch === '`') {
+            return Node.create_root(this.readString('`'));
+        }
+        this.error('Bad string');
+    };
+    Parser.prototype.array = function () {
+        var array = [];
+        var ch = this.ch;
+        if (ch === '[') {
+            ch = this.next('[');
+            this.white();
+            if (ch === ']') {
+                ch = this.next(']');
+                return array;
+            }
+            while (ch) {
+                array.push(this.expression());
+                ch = this.white();
+                if (ch === ']') {
+                    ch = this.next(']');
+                    return array;
+                }
+                this.next(',');
+                ch = this.white();
+            }
+        }
+        this.error('Bad array');
+    };
+    Parser.prototype.value = function () {
+        var ch;
+        this.white();
+        ch = this.ch;
+        switch (ch) {
+            case '{': return this.object();
+            case '[': return this.array();
+            case '"':
+            case "'":
+            case '`': return this.string();
+            case '-': return this.number();
+            default:
+                return ch >= '0' && ch <= '9' ? this.number() : this.identifier();
+        }
+    };
+    /**
+     * Get the function for the given operator.
+     * A `.precedence` value is added to the function, with increasing
+     * precedence having a higher number.
+     * @return {function} The function that performs the infix operation
+     */
+    Parser.prototype.operator = function (opts) {
+        var op = '';
+        var opFn;
+        var ch = this.white();
+        var isIdentifierChar = Identifier.is_valid_start_char;
+        while (ch) {
+            if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||
+                ch === '"' || ch === "'" || ch === '{' || ch === '(' ||
+                ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {
+                break;
+            }
+            if (!opts.not_an_array && ch === '[') {
+                break;
+            }
+            op += ch;
+            ch = this.next();
+            // An infix followed by the prefix e.g. a + @b
+            // TODO: other prefix unary operators
+            if (ch === '@') {
+                break;
+            }
+            isIdentifierChar = Identifier.is_valid_continue_char;
+        }
+        if (op !== '') {
+            if (opts.prefix && op === '-') {
+                op = '&-';
+            }
+            opFn = operators[op];
+            if (!opFn) {
+                this.error("Bad operator: '" + op + "'.");
+            }
+        }
+        return opFn;
+    };
+    /**
+     * Filters
+     * Returns what the Node interprets as an "operator".
+     * e.g.
+     *   <span data-bind="text: name | fit:20 | uppercase"></span>
+     */
+    Parser.prototype.filter = function () {
+        var ch = this.next();
+        var args = [];
+        var nextFilter = function (v) { return v; };
+        var name = this.name();
+        if (!options.filters[name]) {
+            options.onError('Cannot find filter by the name of: ' + name);
+        }
+        ch = this.white();
+        while (ch) {
+            if (ch === ':') {
+                ch = this.next();
+                args.push(this.expression('|'));
+            }
+            if (ch === '|') {
+                nextFilter = this.filter();
+                break;
+            }
+            if (ch === ',') {
+                break;
+            }
+            ch = this.white();
+        }
+        var filter = function filter(value, ignored, context, globals, node) {
+            var argValues = [value];
+            for (var i = 0, j = args.length; i < j; ++i) {
+                argValues.push(Node.value_of(args[i], context, globals, node));
+            }
+            return nextFilter(options.filters[name].apply(null, argValues));
+        };
+        // Lowest precedence.
+        filter.precedence = 1;
+        return filter;
+    };
+    /**
+     * Parse an expression – builds an operator tree, in something like
+     * Shunting-Yard.
+     *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm
+     *
+     * @return {function}   A function that computes the value of the expression
+     *                      when called or a primitive.
+     */
+    Parser.prototype.expression = function (filterable) {
+        var op;
+        var nodes = [];
+        var ch = this.white();
+        while (ch) {
+            // unary prefix operators
+            op = this.operator({ prefix: true });
+            if (op) {
+                nodes.push(undefined); // LHS Tree node.
+                nodes.push(op);
+                ch = this.white();
+            }
+            if (ch === '(') {
+                this.next();
+                nodes.push(this.expression());
+                this.next(')');
+            }
+            else {
+                nodes.push(this.value());
+            }
+            ch = this.white();
+            if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||
+                ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {
+                break;
+            }
+            // filters
+            if (ch === '|' && this.lookahead() !== '|' && filterable) {
+                nodes.push(this.filter());
+                nodes.push(undefined);
+                break;
+            }
+            // infix or postfix operators
+            op = this.operator({ not_an_array: true });
+            if (op === operators['?']) {
+                this.ternary(nodes);
+                break;
+            }
+            else if (op === operators['.']) {
+                nodes.push(op);
+                nodes.push(this.member());
+                op = null;
+            }
+            else if (op === operators['[']) {
+                nodes.push(op);
+                nodes.push(this.expression());
+                ch = this.next(']');
+                op = null;
+            }
+            else if (op) {
+                nodes.push(op);
+            }
+            ch = this.white();
+            if (ch === ']' || (!op && ch === '(')) {
+                break;
+            }
+        }
+        if (nodes.length === 0) {
+            return undefined;
+        }
+        var dereferences = this.dereferences();
+        if (nodes.length === 1 && !dereferences.length) {
+            return nodes[0];
+        }
+        for (var i = 0, j = dereferences.length; i < j; ++i) {
+            var deref = dereferences[i];
+            if (deref.constructor === Arguments) {
+                nodes.push(operators.call);
+            }
+            else {
+                nodes.push(operators['.']);
+            }
+            nodes.push(deref);
+        }
+        return new Expression(nodes);
+    };
+    Parser.prototype.ternary = function (nodes) {
+        var ternary = new Ternary();
+        ternary.yes = this.expression();
+        this.next(':');
+        ternary.no = this.expression();
+        nodes.push(operators['?']);
+        nodes.push(ternary);
+    };
+    /**
+     * Parse the arguments to a function, returning an Array.
+     *
+     */
+    Parser.prototype.funcArguments = function () {
+        var args = [];
+        var ch = this.next('(');
+        while (ch) {
+            ch = this.white();
+            if (ch === ')') {
+                this.next(')');
+                return new Arguments(this, args);
+            }
+            else {
+                args.push(this.expression());
+                ch = this.white();
+            }
+            if (ch !== ')') {
+                this.next(',');
+            }
+        }
+        this.error('Bad arguments to function');
+    };
+    /**
+     * The literal string reference `abc` in an `x.abc` expression.
+     */
+    Parser.prototype.member = function () {
+        var member = '';
+        var ch = this.white();
+        var isIdentifierChar = Identifier.is_valid_start_char;
+        while (ch) {
+            if (!isIdentifierChar(ch)) {
+                break;
+            }
+            member += ch;
+            ch = this.next();
+            isIdentifierChar = Identifier.is_valid_continue_char;
+        }
+        return member;
+    };
+    /**
+     * A dereference applies to an identifer, being either a function
+     * call "()" or a membership lookup with square brackets "[member]".
+     * @return {fn or undefined}  Dereference function to be applied to the
+     *                            Identifier
+     */
+    Parser.prototype.dereference = function () {
+        var member;
+        var ch = this.white();
+        while (ch) {
+            if (ch === '(') {
+                // a(...) function call
+                return this.funcArguments();
+            }
+            else if (ch === '[') {
+                // a[x] membership
+                this.next('[');
+                member = this.expression();
+                this.white();
+                this.next(']');
+                return member;
+            }
+            else if (ch === '.') {
+                // a.x membership
+                this.next('.');
+                return this.member();
+            }
+            else {
+                break;
+            }
+        }
+    };
+    Parser.prototype.dereferences = function () {
+        var ch = this.white();
+        var dereferences = [];
+        var deref;
+        while (ch) {
+            deref = this.dereference();
+            if (deref !== undefined) {
+                dereferences.push(deref);
+            }
+            else {
+                break;
+            }
+        }
+        return dereferences;
+    };
+    Parser.prototype.identifier = function () {
+        var token = '';
+        var isIdentifierChar = Identifier.is_valid_start_char;
+        var ch = this.white();
+        while (ch) {
+            if (!isIdentifierChar(ch)) {
+                break;
+            }
+            token += ch;
+            ch = this.next();
+            isIdentifierChar = Identifier.is_valid_continue_char;
+        }
+        switch (token) {
+            case 'true': return true;
+            case 'false': return false;
+            case 'null': return null;
+            case 'undefined': return void 0;
+            case 'function':
+                throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.');
+        }
+        return new Identifier(this, token, this.dereferences());
+    };
+    Parser.prototype.readBindings = function () {
+        var key;
+        var bindings = {};
+        var sep;
+        var expr;
+        var ch = this.ch;
+        while (ch) {
+            key = this.name();
+            sep = this.white();
+            if (!sep || sep === ',') {
+                if (sep) {
+                    ch = this.next(',');
+                }
+                else {
+                    ch = '';
+                }
+                // A "bare" binding e.g. "text"; substitute value of 'null'
+                // so it becomes "text: null".
+                bindings[key] = null;
+            }
+            else {
+                if (key.indexOf('.') !== -1) {
+                    // Namespaced – i.e.
+                    //    `attr.css: x` becomes `attr: { css: x }`
+                    //     ^^^ - key
+                    key = key.split('.');
+                    bindings[key[0]] = bindings[key[0]] || {};
+                    if (key.length !== 2) {
+                        options.onError('Binding ' + key + ' should have two parts (a.b).');
+                    }
+                    else if (bindings[key[0]].constructor !== Object) {
+                        options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');
+                    }
+                    ch = this.next(':');
+                    this.objectAddValue(bindings[key[0]], key[1], this.expression(true));
+                }
+                else {
+                    ch = this.next(':');
+                    if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {
+                        // Extend a namespaced bindings e.g. we've previously seen
+                        // on.x, now we're seeing on: { 'abc' }.
+                        expr = this.expression(true);
+                        if (typeof expr !== 'object' || expr.constructor !== Object) {
+                            options.onError('Expected plain object for ' + key + ' value.');
+                        }
+                        else {
+                            extend(bindings[key], expr);
+                        }
+                    }
+                    else {
+                        bindings[key] = this.expression(true);
+                    }
+                }
+                this.white();
+                if (this.ch) {
+                    ch = this.next(',');
+                }
+                else {
+                    ch = '';
+                }
+            }
+        }
+        return bindings;
+    };
+    Parser.prototype.valueAsAccessor = function (value, context, globals, node) {
+        if (!value) {
+            return function () { return value; };
+        }
+        if (typeof value === 'function') {
+            return value;
+        }
+        if (value[Node.isExpressionOrIdentifierSymbol]) {
+            return function () { return Node.value_of(value, context, globals, node); };
+        }
+        if (Array.isArray(value)) {
+            return function () { return value.map(function (v) { return Node.value_of(v, context, globals, node); }); };
+        }
+        if (typeof (value) !== 'function') {
+            return function () { return clonePlainObjectDeep(value); };
+        }
+        throw new Error('Value has cannot be converted to accessor: ' + value);
+    };
+    /**
+    * Convert result[name] from a value to a function (i.e. `valueAccessor()`)
+    * @param  {object} result [Map of top-level names to values]
+    * @return {object}        [Map of top-level names to functions]
+    *
+    * Accessors may be one of (below) constAccessor, identifierAccessor,
+    * expressionAccessor, or nodeAccessor.
+    */
+    Parser.prototype.convertToAccessors = function (result, context, globals, node) {
+        var _this = this;
+        objectForEach(result, function (name, value) {
+            if (value instanceof Identifier) {
+                // Return a function that, with no arguments returns
+                // the value of the identifier, otherwise sets the
+                // value of the identifier to the first given argument.
+                Object.defineProperty(result, name, {
+                    value: function (optionalValue, options$$1) {
+                        var currentValue = value.get_value(undefined, context, globals, node);
+                        if (arguments.length === 0) {
+                            return currentValue;
+                        }
+                        var unchanged = optionalValue === currentValue;
+                        if (options$$1 && options$$1.onlyIfChanged && unchanged) {
+                            return;
+                        }
+                        return value.set_value(optionalValue, context, globals);
+                    }
+                });
+            }
+            else {
+                result[name] = _this.valueAsAccessor(value, context, globals, node);
+            }
+        });
+        return result;
+    };
+    Parser.prototype.runParse = function (source, fn) {
+        this.text = (source || '').trim();
+        this.at = 0;
+        this.ch = ' ';
+        try {
+            var result = fn();
+            this.white();
+            if (this.ch) {
+                this.error('Syntax Error');
+            }
+            return result;
+        }
+        catch (e) {
+            options.onError(e);
+        }
+    };
+    /**
+     * Get the bindings as name: accessor()
+     * @param  {string} source The binding string to parse.
+     * @return {object}        Map of name to accessor function.
+     */
+    Parser.prototype.parse = function (source, context, globals, node) {
+        var _this = this;
+        if (context === void 0) { context = {}; }
+        if (globals === void 0) { globals = {}; }
+        if (!source) {
+            return function () { return null; };
+        }
+        this.currentContextGlobals = [context, globals, node];
+        var parseFn = function () { return _this.readBindings(); };
+        var bindingAccessors = this.runParse(source, parseFn);
+        return this.convertToAccessors(bindingAccessors, context, globals, node);
+    };
+    /**
+     * Return a function that evaluates and returns the result of the expression.
+     */
+    Parser.prototype.parseExpression = function (source, context, globals, node) {
+        var _this = this;
+        if (context === void 0) { context = {}; }
+        if (globals === void 0) { globals = {}; }
+        if (!source) {
+            return function () { return ''; };
+        }
+        this.currentContextGlobals = [context, globals, node];
+        var parseFn = function () { return _this.expression(true); };
+        var bindingAccessors = this.runParse(source, parseFn);
+        return this.valueAsAccessor(bindingAccessors, context, globals, node);
+    };
+    return Parser;
+}());
+
+/* eslint no-cond-assign: 0 */
+// The following regular expressions will be used to split an object-literal string into tokens
+// These two match strings, either with double quotes or single quotes
+var stringDouble = '"(?:[^"\\\\]|\\\\.)*"';
+var stringSingle = "'(?:[^'\\\\]|\\\\.)*'";
+var stringRegexp = '/(?:[^/\\\\]|\\\\.)*/\w*';
+var specials = ',"\'{}()/:[\\]';
+var everyThingElse = '[^\\s:,/][^' + specials + ']*[^\\s' + specials + ']';
+var oneNotSpace = '[^\\s]';
+var bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');
+var divisionLookBehind = /[\])"'A-Za-z0-9_$]+$/;
+var keywordRegexLookBehind = {
+    'in': 1,
+    'return': 1,
+    'typeof': 1
+};
+/**
+ * Break a binding string (data-bind='x: val, y: ..') into a stable array
+ * of {key: value}.
+ */
+function parseObjectLiteral(objectLiteralString) {
+    // Trim leading and trailing spaces from the string
+    var str = stringTrim(objectLiteralString);
+    // Trim braces '{' surrounding the whole object literal
+    if (str.charCodeAt(0) === 123)
+        str = str.slice(1, -1);
+    // Split into tokens
+    var result = [], toks = str.match(bindingToken), key, values = [], depth = 0;
+    if (!toks) {
+        return [];
+    }
+    // Append a comma so that we don't need a separate code block to deal with the last item
+    toks.push(',');
+    for (var i = 0, tok; tok = toks[i]; ++i) {
+        var c = tok.charCodeAt(0);
+        // A comma signals the end of a key/value pair if depth is zero
+        if (c === 44) {
+            if (depth <= 0) {
+                result.push((key && values.length) ? {
+                    key: key,
+                    value: values.join('')
+                } : {
+                    'unknown': key || values.join('')
+                });
+                key = depth = 0;
+                values = [];
+                continue;
+            }
+            // Simply skip the colon that separates the name and value
+        }
+        else if (c === 58) {
+            if (!depth && !key && values.length === 1) {
+                key = values.pop();
+                continue;
+            }
+            // A set of slashes is initially matched as a regular expression, but could be division
+        }
+        else if (c === 47 && i && tok.length > 1) {
+            // Look at the end of the previous token to determine if the slash is actually division
+            var match = toks[i - 1].match(divisionLookBehind);
+            if (match && !keywordRegexLookBehind[match[0]]) {
+                // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)
+                str = str.substr(str.indexOf(tok) + 1);
+                toks = str.match(bindingToken);
+                toks.push(',');
+                i = -1;
+                // Continue with just the slash
+                tok = '/';
+            }
+            // Increment depth for parentheses, braces, and brackets so that interior commas are ignored
+        }
+        else if (c === 40 || c === 123 || c === 91) {
+            ++depth;
+        }
+        else if (c === 41 || c === 125 || c === 93) {
+            --depth;
+            // The key will be the first token; if it's a string, trim the quotes
+        }
+        else if (!key && !values.length && (c === 34 || c === 39)) {
+            tok = tok.slice(1, -1);
+        }
+        values.push(tok);
+    }
+    return result;
+}
+
+var BindingHandlerObject = /** @class */ (function () {
+    function BindingHandlerObject() {
+    }
+    BindingHandlerObject.prototype.set = function (nameOrObject, value) {
+        if (typeof nameOrObject === 'string') {
+            this[nameOrObject] = value;
+        }
+        else if (typeof nameOrObject === 'object') {
+            if (value !== undefined) {
+                options.onError(new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));
+            }
+            Object.assign(this, nameOrObject);
+        }
+        else {
+            options.onError(new Error('Given a bad binding handler type: ' + nameOrObject));
+        }
+    };
+    /**
+     * The handler may have a `.` in it, e.g. `attr.title`, in which case the
+     * handler is `attr`.  Otherwise it's the name given
+     */
+    BindingHandlerObject.prototype.get = function (nameOrDotted) {
+        var name = nameOrDotted.split('.')[0];
+        return this[name];
+    };
+    return BindingHandlerObject;
+}());
+
+var Provider = /** @class */ (function () {
+    function Provider(params) {
+        if (params === void 0) { params = {}; }
+        if (this.constructor === Provider) {
+            throw new Error('Provider is an abstract base class.');
+        }
+        if (!('FOR_NODE_TYPES' in this)) {
+            // FOR_NODE_TYPES must return a list of integers corresponding to the
+            // node.nodeType's that the provider handles.
+            throw new Error('Providers must have FOR_NODE_TYPES property');
+        }
+        this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();
+        this.globals = params.globals || {};
+    }
+    Provider.prototype.nodeHasBindings = function () { };
+    Provider.prototype.getBindingAccessors = function () { };
+    Provider.prototype.preprocessNode = function () { };
+    Provider.prototype.postProcess = function () { };
+    return Provider;
+}());
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$1 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$1(d, b) {
+    extendStatics$1(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+function __generator(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+
+
+function __values(o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+}
+
+/**
+ * BindingStringProvider is an abstract base class parses a binding string.
+ *
+ * Children must implement `nodeHasBindings` and `getBindingString`.
+ */
+var BindingStringProvider = /** @class */ (function (_super) {
+    __extends$1(BindingStringProvider, _super);
+    function BindingStringProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    /** Call bindingHandler.preprocess on each respective binding string.
+     *
+     * The `preprocess` property of bindingHandler must be a static
+     * function (i.e. on the object or constructor).
+     */
+    BindingStringProvider.prototype.processBinding = function (key, value) {
+        var _a, handlerName, property, handler, bindingsAddedByHandler_1, chainFn, _i, bindingsAddedByHandler_2, _b, key_1, value_1;
+        return __generator(this, function (_c) {
+            switch (_c.label) {
+                case 0:
+                    _a = key.split('.'), handlerName = _a[0], property = _a[1];
+                    handler = this.bindingHandlers.get(handlerName);
+                    if (!(handler && handler.preprocess)) return [3 /*break*/, 5];
+                    bindingsAddedByHandler_1 = [];
+                    chainFn = function () {
+                        var args = [];
+                        for (var _i = 0; _i < arguments.length; _i++) {
+                            args[_i] = arguments[_i];
+                        }
+                        return bindingsAddedByHandler_1.push(args);
+                    };
+                    value = handler.preprocess(value, key, chainFn);
+                    _i = 0, bindingsAddedByHandler_2 = bindingsAddedByHandler_1;
+                    _c.label = 1;
+                case 1:
+                    if (!(_i < bindingsAddedByHandler_2.length)) return [3 /*break*/, 4];
+                    _b = bindingsAddedByHandler_2[_i], key_1 = _b[0], value_1 = _b[1];
+                    return [5 /*yield**/, __values(this.processBinding(key_1, value_1))];
+                case 2:
+                    _c.sent();
+                    _c.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [3 /*break*/, 6];
+                case 5:
+                    if (property) {
+                        value = "{" + property + ":" + value + "}";
+                    }
+                    _c.label = 6;
+                case 6: return [4 /*yield*/, handlerName + ":" + value];
+                case 7:
+                    _c.sent();
+                    return [2 /*return*/];
+            }
+        });
+    };
+    BindingStringProvider.prototype.generateBindingString = function (bindingString) {
+        var _i, _a, _b, key, unknown, value;
+        return __generator(this, function (_c) {
+            switch (_c.label) {
+                case 0:
+                    _i = 0, _a = parseObjectLiteral(bindingString);
+                    _c.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    _b = _a[_i], key = _b.key, unknown = _b.unknown, value = _b.value;
+                    return [5 /*yield**/, __values(this.processBinding(key || unknown, value))];
+                case 2:
+                    _c.sent();
+                    _c.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    BindingStringProvider.prototype.preProcessBindings = function (bindingString) {
+        return Array.from(this.generateBindingString(bindingString)).join(',');
+    };
+    BindingStringProvider.prototype.getBindingAccessors = function (node, context) {
+        var bindingString = node && this.getBindingString(node);
+        if (!bindingString) {
+            return;
+        }
+        var processed = this.preProcessBindings(bindingString);
+        return new Parser().parse(processed, context, this.globals, node);
+    };
+    BindingStringProvider.prototype.getBindingString = function () { throw new Error('Overload getBindingString.'); };
+    return BindingStringProvider;
+}(Provider));
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends(d, b) {
+    extendStatics(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var VirtualProvider = /** @class */ (function (_super) {
+    __extends(VirtualProvider, _super);
+    function VirtualProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(VirtualProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [8]; } // document.COMMENT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    VirtualProvider.prototype.getBindingString = function (node) {
+        if (node.nodeType === document.COMMENT_NODE) {
+            return virtualElements.virtualNodeBindingValue(node);
+        }
+    };
+    VirtualProvider.prototype.nodeHasBindings = function (node) {
+        if (node.nodeType === document.COMMENT_NODE) {
+            return virtualElements.isStartComment(node);
+        }
+    };
+    return VirtualProvider;
+}(BindingStringProvider));
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$2 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$2(d, b) {
+    extendStatics$2(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var DataBindProvider = /** @class */ (function (_super) {
+    __extends$2(DataBindProvider, _super);
+    function DataBindProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(DataBindProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [1]; } // document.ELEMENT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(DataBindProvider.prototype, "BIND_ATTRIBUTE", {
+        get: function () {
+            return 'data-bind';
+        },
+        enumerable: true,
+        configurable: true
+    });
+    DataBindProvider.prototype.getBindingString = function (node) {
+        if (node.nodeType === document.ELEMENT_NODE) {
+            return node.getAttribute(this.BIND_ATTRIBUTE);
+        }
+    };
+    DataBindProvider.prototype.nodeHasBindings = function (node) {
+        if (node.nodeType === document.ELEMENT_NODE) {
+            return node.hasAttribute(this.BIND_ATTRIBUTE);
+        }
+    };
+    return DataBindProvider;
+}(BindingStringProvider));
+
+'use strict';
+var SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');
+var ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');
+var LifeCycle = /** @class */ (function () {
+    function LifeCycle() {
+    }
+    // NOTE: For more advanced integration as an ES6 mixin, see e.g.:
+    // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/
+    /**
+     * Copy the properties of the LifeCycle class to the target (or its prototype)
+     *
+     * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.
+     */
+    LifeCycle.mixInto = function (Constructor) {
+        var target = Constructor.prototype || Constructor;
+        var mixin = LifeCycle.prototype;
+        for (var _i = 0, _a = Object.getOwnPropertyNames(mixin); _i < _a.length; _i++) {
+            var prop = _a[_i];
+            target[prop] = mixin[prop];
+        }
+    };
+    LifeCycle.prototype.subscribe = function (observable, action) {
+        if (typeof action === 'string') {
+            action = this[action].bind(this);
+        }
+        this.addDisposable(observable.subscribe(action));
+    };
+    LifeCycle.prototype.computed = function (params) {
+        if (typeof params === 'string') {
+            params = { read: this[params], write: this[params], owner: this };
+        }
+        else if (typeof params === 'object') {
+            // Pass directly.
+        }
+        else if (typeof params === 'function') {
+            params = { read: params, write: params };
+        }
+        else {
+            throw new Error('LifeCycle::computed not given a valid type.');
+        }
+        params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];
+        return this.addDisposable(computed(params));
+    };
+    /**
+     * Add an event listener for the given or anchored node.
+     * @param {node} [node] (optional) The target node (otherwise the anchored node)
+     * @param {string} [type] Event type
+     * @param {function|string} [action] Either call the given function or `this[action]`
+     * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`
+     */
+    LifeCycle.prototype.addEventListener = function () {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i] = arguments[_i];
+        }
+        var node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];
+        var type = args[0], act = args[1], options$$1 = args[2];
+        var handler = typeof act === 'string' ? this[act].bind(this) : act;
+        this.__addEventListener(node, type, handler, options$$1);
+    };
+    LifeCycle.prototype.__addEventListener = function (node, eventType, handler, options$$1) {
+        node.addEventListener(eventType, handler, options$$1);
+        function dispose() { node.removeEventListener(eventType, handler); }
+        addDisposeCallback(node, dispose);
+        this.addDisposable({ dispose: dispose });
+    };
+    LifeCycle.prototype.anchorTo = function (node) {
+        var _this = this;
+        addDisposeCallback(node, function () { return _this.dispose(); });
+        this[ANCHOR_NODE] = node;
+    };
+    LifeCycle.prototype.dispose = function () {
+        var subscriptions = this[SUBSCRIPTIONS] || [];
+        subscriptions.forEach(function (s) { return s.dispose(); });
+        this[SUBSCRIPTIONS] = [];
+        this[ANCHOR_NODE] = null;
+    };
+    LifeCycle.prototype.addDisposable = function (subscription) {
+        var subscriptions = this[SUBSCRIPTIONS] || [];
+        if (!this[SUBSCRIPTIONS]) {
+            this[SUBSCRIPTIONS] = subscriptions;
+        }
+        if (typeof subscription.dispose !== 'function') {
+            throw new Error('Lifecycle::addDisposable argument missing `dispose`.');
+        }
+        subscriptions.push(subscription);
+        return subscription;
+    };
+    return LifeCycle;
+}());
+
+var loadingSubscribablesCache = {};
+var loadedDefinitionsCache = {}; // Tracks component loads that have already completed
+function loadComponentAndNotify(componentName, callback) {
+    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName), completedAsync;
+    if (!_subscribable) {
+        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.
+        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();
+        _subscribable.subscribe(callback);
+        beginLoadingComponent(componentName, function (definition, config) {
+            var isSynchronousComponent = !!(config && config.synchronous);
+            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };
+            delete loadingSubscribablesCache[componentName];
+            // For API consistency, all loads complete asynchronously. However we want to avoid
+            // adding an extra task schedule if it's unnecessary (i.e., the completion is already
+            // async).
+            //
+            // You can bypass the 'always asynchronous' feature by putting the synchronous:true
+            // flag on your component configuration when you register it.
+            if (completedAsync || isSynchronousComponent) {
+                // Note that notifySubscribers ignores any dependencies read within the callback.
+                // See comment in loaderRegistryBehaviors.js for reasoning
+                _subscribable.notifySubscribers(definition);
+            }
+            else {
+                tasks.schedule(function () {
+                    _subscribable.notifySubscribers(definition);
+                });
+            }
+        });
+        completedAsync = true;
+    }
+    else {
+        _subscribable.subscribe(callback);
+    }
+}
+function beginLoadingComponent(componentName, callback) {
+    getFirstResultFromLoaders('getConfig', [componentName], function (config) {
+        if (config) {
+            // We have a config, so now load its definition
+            getFirstResultFromLoaders('loadComponent', [componentName, config], function (definition) {
+                callback(definition, config);
+            });
+        }
+        else {
+            // The component has no config - it's unknown to all the loaders.
+            // Note that this is not an error (e.g., a module loading error) - that would abort the
+            // process and this callback would not run. For this callback to run, all loaders must
+            // have confirmed they don't know about this component.
+            callback(null, null);
+        }
+    });
+}
+function getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {
+    // On the first call in the stack, start with the full set of loaders
+    if (!candidateLoaders) {
+        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array
+    }
+    // Try the next candidate
+    var currentCandidateLoader = candidateLoaders.shift();
+    if (currentCandidateLoader) {
+        var methodInstance = currentCandidateLoader[methodName];
+        if (methodInstance) {
+            var wasAborted = false, synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function (result) {
+                if (wasAborted) {
+                    callback(null);
+                }
+                else if (result !== null) {
+                    // This candidate returned a value. Use it.
+                    callback(result);
+                }
+                else {
+                    // Try the next candidate
+                    getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
+                }
+            }));
+            // Currently, loaders may not return anything synchronously. This leaves open the possibility
+            // that we'll extend the API to support synchronous return values in the future. It won't be
+            // a breaking change, because currently no loader is allowed to return anything except undefined.
+            if (synchronousReturnValue !== undefined) {
+                wasAborted = true;
+                // Method to suppress exceptions will remain undocumented. This is only to keep
+                // KO's specs running tidily, since we can observe the loading got aborted without
+                // having exceptions cluttering up the console too.
+                if (!currentCandidateLoader.suppressLoaderExceptions) {
+                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');
+                }
+            }
+        }
+        else {
+            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.
+            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);
+        }
+    }
+    else {
+        // No candidates returned a value
+        callback(null);
+    }
+}
+var registry = {
+    get: function (componentName, callback) {
+        var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);
+        if (cachedDefinition) {
+            // It's already loaded and cached. Reuse the same definition object.
+            // Note that for API consistency, even cache hits complete asynchronously by default.
+            // You can bypass this by putting synchronous:true on your component config.
+            if (cachedDefinition.isSynchronousComponent) {
+                dependencyDetection.ignore(function () {
+                    callback(cachedDefinition.definition);
+                });
+            }
+            else {
+                tasks.schedule(function () { callback(cachedDefinition.definition); });
+            }
+        }
+        else {
+            // Join the loading process that is already underway, or start a new one.
+            loadComponentAndNotify(componentName, callback);
+        }
+    },
+    clearCachedDefinition: function (componentName) {
+        delete loadedDefinitionsCache[componentName];
+    },
+    _getFirstResultFromLoaders: getFirstResultFromLoaders,
+    loaders: []
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$4 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$1$1(d, b) {
+    extendStatics$4(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+// The default loader is responsible for two things:
+// 1. Maintaining the default in-memory registry of component configuration objects
+//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))
+// 2. Answering requests for components by fetching configuration objects
+//    from that default in-memory registry and resolving them into standard
+//    component definition objects (of the form { createViewModel: ..., template: ... })
+// Custom loaders may override either of these facilities, i.e.,
+// 1. To supply configuration objects from some other source (e.g., conventions)
+// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.
+var defaultConfigRegistry = {};
+function register(componentName, config) {
+    if (!config) {
+        throw new Error('Invalid configuration for ' + componentName);
+    }
+    if (isRegistered(componentName)) {
+        throw new Error('Component ' + componentName + ' is already registered');
+    }
+    defaultConfigRegistry[componentName] = config;
+}
+function isRegistered(componentName) {
+    return defaultConfigRegistry.hasOwnProperty(componentName);
+}
+function unregister(componentName) {
+    delete defaultConfigRegistry[componentName];
+    registry.clearCachedDefinition(componentName);
+}
+var defaultLoader = {
+    getConfig: function (componentName, callback) {
+        var result = defaultConfigRegistry.hasOwnProperty(componentName)
+            ? defaultConfigRegistry[componentName]
+            : null;
+        callback(result);
+    },
+    loadComponent: function (componentName, config, callback) {
+        var errorCallback = makeErrorCallback(componentName);
+        possiblyGetConfigFromAmd(errorCallback, config, function (loadedConfig) {
+            resolveConfig(componentName, errorCallback, loadedConfig, callback);
+        });
+    },
+    loadTemplate: function (componentName, templateConfig, callback) {
+        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);
+    },
+    loadViewModel: function (componentName, viewModelConfig, callback) {
+        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);
+    }
+};
+var createViewModelKey = 'createViewModel';
+// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it
+// into the standard component definition format:
+//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.
+// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed
+// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,
+// so this is implemented manually below.
+function resolveConfig(componentName, errorCallback, config, callback) {
+    var result = {}, makeCallBackWhenZero = 2, tryIssueCallback = function () {
+        if (--makeCallBackWhenZero === 0) {
+            callback(result);
+        }
+    }, templateConfig = config['template'], viewModelConfig = config['viewModel'];
+    if (templateConfig) {
+        possiblyGetConfigFromAmd(errorCallback, templateConfig, function (loadedConfig) {
+            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function (resolvedTemplate) {
+                result['template'] = resolvedTemplate;
+                tryIssueCallback();
+            });
+        });
+    }
+    else {
+        tryIssueCallback();
+    }
+    if (viewModelConfig) {
+        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function (loadedConfig) {
+            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function (resolvedViewModel) {
+                result[createViewModelKey] = resolvedViewModel;
+                tryIssueCallback();
+            });
+        });
+    }
+    else {
+        tryIssueCallback();
+    }
+}
+function resolveTemplate(errorCallback, templateConfig, callback) {
+    if (typeof templateConfig === 'string') {
+        // Markup - parse it
+        callback(parseHtmlFragment(templateConfig));
+    }
+    else if (templateConfig instanceof Array) {
+        // Assume already an array of DOM nodes - pass through unchanged
+        callback(templateConfig);
+    }
+    else if (isDocumentFragment(templateConfig)) {
+        // Document fragment - use its child nodes
+        callback(makeArray(templateConfig.childNodes));
+    }
+    else if (templateConfig['element']) {
+        var element = templateConfig['element'];
+        if (isDomElement(element)) {
+            // Element instance - copy its child nodes
+            callback(cloneNodesFromTemplateSourceElement(element));
+        }
+        else if (typeof element === 'string') {
+            // Element ID - find it, then copy its child nodes
+            var elemInstance = document.getElementById(element);
+            if (elemInstance) {
+                callback(cloneNodesFromTemplateSourceElement(elemInstance));
+            }
+            else {
+                errorCallback('Cannot find element with ID ' + element);
+            }
+        }
+        else {
+            errorCallback('Unknown element type: ' + element);
+        }
+    }
+    else {
+        errorCallback('Unknown template value: ' + templateConfig);
+    }
+}
+function resolveViewModel(errorCallback, viewModelConfig, callback) {
+    if (typeof viewModelConfig === 'function') {
+        // Constructor - convert to standard factory function format
+        // By design, this does *not* supply componentInfo to the constructor, as the intent is that
+        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only
+        // be used in factory functions, not viewmodel constructors.
+        callback(function (params /*, componentInfo */) {
+            return new viewModelConfig(params);
+        });
+    }
+    else if (typeof viewModelConfig[createViewModelKey] === 'function') {
+        // Already a factory function - use it as-is
+        callback(viewModelConfig[createViewModelKey]);
+    }
+    else if ('instance' in viewModelConfig) {
+        // Fixed object instance - promote to createViewModel format for API consistency
+        var fixedInstance = viewModelConfig['instance'];
+        callback(function () {
+            return fixedInstance;
+        });
+    }
+    else if ('viewModel' in viewModelConfig) {
+        // Resolved AMD module whose value is of the form { viewModel: ... }
+        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);
+    }
+    else {
+        errorCallback('Unknown viewModel value: ' + viewModelConfig);
+    }
+}
+function cloneNodesFromTemplateSourceElement(elemInstance) {
+    switch (tagNameLower(elemInstance)) {
+        case 'script':
+            return parseHtmlFragment(elemInstance.text);
+        case 'textarea':
+            return parseHtmlFragment(elemInstance.value);
+        case 'template':
+            // For browsers with proper <template> element support (i.e., where the .content property
+            // gives a document fragment), use that document fragment.
+            if (isDocumentFragment(elemInstance.content)) {
+                return cloneNodes(elemInstance.content.childNodes);
+            }
+    }
+    // Regular elements such as <div>, and <template> elements on old browsers that don't really
+    // understand <template> and just treat it as a regular container
+    return cloneNodes(elemInstance.childNodes);
+}
+function possiblyGetConfigFromAmd(errorCallback, config, callback) {
+    if (typeof config.require === 'string') {
+        // The config is the value of an AMD module
+        if (window.amdRequire || window.require) {
+            (window.amdRequire || window.require)([config.require], callback);
+        }
+        else {
+            errorCallback('Uses require, but no AMD loader is present');
+        }
+    }
+    else {
+        callback(config);
+    }
+}
+function makeErrorCallback(componentName) {
+    return function (message) {
+        throw new Error('Component \'' + componentName + '\': ' + message);
+    };
+}
+// By default, the default loader is the only registered component loader
+registry.loaders.push(defaultLoader);
+
+/**
+ * Component --- Abstract Base Class
+ *
+ * This simplifies and compartmentalizes Components.  Use this:
+ *
+ *    class CompX extends ComponentABC {
+ *    	static get element () { return 'comp-x-id' }
+ *    	static get sync () { return false }
+ *    	static get elementName () { return 'comp-x' }
+ *    }
+ *    CompX.register()
+ *
+ * instead of:
+ *
+ *   class CompX {}
+ *
+ *   ko.components.register('comp-x', {
+ *     viewModel: CompX,
+ *     synchronous: false,
+ *     template: { element: 'comp-x' }
+ *   })
+ *
+ * As well, gain all the benefits of a LifeCycle, namely automated
+ * event and subscription addition/removal.
+ *
+ * NOTE: A Component created this way can add events to the component node
+ * with `this.addEventListener(type, action)`.
+ */
+var ComponentABC = /** @class */ (function (_super) {
+    __extends$1$1(ComponentABC, _super);
+    function ComponentABC() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(ComponentABC, "elementName", {
+        /**
+         * @return {string} The custom node name of this component.
+         */
+        get: function () {
+            throw new Error("[ComponentABC] `elementName` must be overloaded.");
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ComponentABC, "template", {
+        /**
+         * Overload this to return:
+         * 1. A string of markup
+         * 2. An array of DOM nodes
+         * 3. A document fragment
+         * 4. An AMD module (with `{require: 'some/template'}`)
+         * @return {mixed} One of the accepted template types for the ComponentBinding.
+         */
+        get: function () { return { element: this.element }; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ComponentABC, "element", {
+        /**
+         * This is called by the default `template`.  Overload this to return:
+         * 1. The element ID
+         * 2. A DOM node itself
+         * @return {string|HTMLElement} either the element ID or actual element.
+         */
+        get: function () {
+            throw new Error("[ComponentABC] `element` must be overloaded.");
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ComponentABC, "sync", {
+        /**
+         * @return {bool} True if the component shall load synchronously
+         */
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    ComponentABC.register = function (name) {
+        if (name === void 0) { name = this.elementName; }
+        var viewModel = this;
+        var template = this.template;
+        var synchronous = this.sync;
+        register(name, { viewModel: viewModel, template: template, synchronous: synchronous });
+    };
+    return ComponentABC;
+}(LifeCycle));
+
+var index$1 = {
+    ComponentABC: ComponentABC,
+    // -- Registry --
+    get: registry.get,
+    clearCachedDefinition: registry.clearCachedDefinition,
+    // -- Loader --
+    register: register,
+    isRegistered: isRegistered,
+    unregister: unregister,
+    defaultLoader: defaultLoader,
+    // "Privately" expose the underlying config registry for use in old-IE shim
+    _allRegisteredComponents: defaultConfigRegistry,
+    get loaders() { return registry.loaders; },
+    set loaders(loaders) { registry.loaders = loaders; }
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$3 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$3(d, b) {
+    extendStatics$3(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+var ComponentProvider = /** @class */ (function (_super) {
+    __extends$3(ComponentProvider, _super);
+    function ComponentProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(ComponentProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [1]; } // document.ELEMENT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    ComponentProvider.prototype.nodeHasBindings = function (node) {
+        return Boolean(this.getComponentNameForNode(node));
+    };
+    ComponentProvider.prototype.getBindingAccessors = function (node, context) {
+        var _this = this;
+        var componentName = this.getComponentNameForNode(node);
+        if (!componentName) {
+            return;
+        }
+        var component = function () { return ({
+            name: componentName,
+            params: _this.getComponentParams(node, context)
+        }); };
+        return { component: component };
+    };
+    ComponentProvider.prototype.getComponentNameForNode = function (node) {
+        if (node.nodeType !== node.ELEMENT_NODE) {
+            return;
+        }
+        var tagName = tagNameLower(node);
+        if (index$1.isRegistered(tagName)) {
+            var hasDash = tagName.includes('-');
+            var isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';
+            if (hasDash || isUnknownEntity) {
+                return tagName;
+            }
+        }
+    };
+    ComponentProvider.prototype.getComponentParams = function (node, context) {
+        var _this = this;
+        var parser = new Parser(node, context, this.globals);
+        var paramsString = (node.getAttribute('params') || '').trim();
+        var accessors = parser.parse(paramsString, context, node);
+        if (!accessors || Object.keys(accessors).length === 0) {
+            return { $raw: {} };
+        }
+        var $raw = objectMap(accessors, function (value) { return computed(value, null, { disposeWhenNodeIsRemoved: node }); });
+        var params = objectMap($raw, function (v) { return _this.makeParamValue(node, v); });
+        return Object.assign({ $raw: $raw }, params);
+    };
+    ComponentProvider.prototype.makeParamValue = function (node, paramValueComputed) {
+        var paramValue = paramValueComputed.peek();
+        // Does the evaluation of the parameter value unwrap any observables?
+        if (!paramValueComputed.isActive()) {
+            // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.
+            // Example: "someVal: firstName, age: 123" (whether or not firstName is an observable/computed)
+            return paramValue;
+        }
+        // Yes it does. Supply a computed property that unwraps both the outer (binding expression)
+        // level of observability, and any inner (resulting model value) level of observability.
+        // This means the component doesn't have to worry about multiple unwrapping. If the value is a
+        // writable observable, the computed will also be writable and pass the value on to the observable.
+        var isWriteable = isWriteableObservable(paramValue);
+        return computed({
+            read: function () { return unwrap(paramValueComputed()); },
+            write: isWriteable ? function (v) { return paramValueComputed()(v); } : null,
+            disposeWhenNodeIsRemoved: node
+        });
+    };
+    return ComponentProvider;
+}(Provider));
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$5 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$4(d, b) {
+    extendStatics$5(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+function __generator$1(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+/**
+ * Convert attributes with ko-* to bindings.
+ *
+ * e.g.
+ * <div ko-visible='value'></div>
+ */
+var AttrProvider = /** @class */ (function (_super) {
+    __extends$4(AttrProvider, _super);
+    function AttrProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(AttrProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [1]; } // document.ELEMENT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(AttrProvider.prototype, "PREFIX", {
+        get: function () { return 'ko-'; },
+        enumerable: true,
+        configurable: true
+    });
+    AttrProvider.prototype.getBindingAttributesList = function (node) {
+        var _this = this;
+        if (!node.hasAttributes()) {
+            return [];
+        }
+        return Array.from(node.attributes)
+            .filter(function (attr) { return attr.name.startsWith(_this.PREFIX); });
+    };
+    AttrProvider.prototype.nodeHasBindings = function (node) {
+        return this.getBindingAttributesList(node).length > 0;
+    };
+    AttrProvider.prototype.getBindingAccessors = function (node, context) {
+        return Object.assign.apply(Object, [{}].concat(this.handlersFromAttributes(node, context)));
+    };
+    AttrProvider.prototype.handlersFromAttributes = function (node, context) {
+        var _this = this;
+        var _loop_1, this_1, _i, _a, attr;
+        return __generator$1(this, function (_b) {
+            switch (_b.label) {
+                case 0:
+                    _loop_1 = function (attr) {
+                        var name, _a;
+                        return __generator$1(this, function (_b) {
+                            switch (_b.label) {
+                                case 0:
+                                    name = attr.name.substr(this_1.PREFIX.length);
+                                    return [4 /*yield*/, (_a = {}, _a[name] = function () { return _this.getValue(attr.value, context, node); }, _a)];
+                                case 1:
+                                    _b.sent();
+                                    return [2 /*return*/];
+                            }
+                        });
+                    };
+                    this_1 = this;
+                    _i = 0, _a = this.getBindingAttributesList(node);
+                    _b.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    attr = _a[_i];
+                    return [5 /*yield**/, _loop_1(attr)];
+                case 2:
+                    _b.sent();
+                    _b.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    AttrProvider.prototype.getValue = function (token, $context, node) {
+        /* FIXME: This duplicates Identifier.prototype.lookup_value; it should
+           be refactored into e.g. a BindingContext method */
+        if (!token) {
+            return;
+        }
+        var $data = $context.$data;
+        switch (token) {
+            case '$element': return node;
+            case '$context': return $context;
+            case 'this':
+            case '$data': return $context.$data;
+        }
+        if ($data instanceof Object && token in $data) {
+            return $data[token];
+        }
+        if (token in $context) {
+            return $context[token];
+        }
+        if (token in this.globals) {
+            return this.globals[token];
+        }
+        throw new Error("The variable '" + token + " not found.");
+    };
+    return AttrProvider;
+}(Provider));
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$6 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$5(d, b) {
+    extendStatics$6(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+function __generator$2(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+var MultiProvider = /** @class */ (function (_super) {
+    __extends$5(MultiProvider, _super);
+    function MultiProvider(params) {
+        if (params === void 0) { params = {}; }
+        var _this = _super.call(this, params) || this;
+        var providers = params.providers || [];
+        _this.nodeTypeMap = {};
+        _this.nodeTypes = [];
+        _this.providers = [];
+        providers.forEach(function (p) { return _this.addProvider(p); });
+        return _this;
+    }
+    Object.defineProperty(MultiProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return this.nodeTypes; },
+        enumerable: true,
+        configurable: true
+    });
+    MultiProvider.prototype.addProvider = function (provider) {
+        this.providers.push(provider);
+        provider.bindingHandlers = this.bindingHandlers;
+        provider.globals = this.globals;
+        var nodeTypeMap = this.nodeTypeMap;
+        for (var _i = 0, _a = provider.FOR_NODE_TYPES; _i < _a.length; _i++) {
+            var nodeType = _a[_i];
+            if (!nodeTypeMap[nodeType]) {
+                nodeTypeMap[nodeType] = [];
+            }
+            nodeTypeMap[nodeType].push(provider);
+        }
+        this.nodeTypes = Object.keys(this.nodeTypeMap).map(function (k) { return parseInt(k, 10); });
+    };
+    MultiProvider.prototype.providersFor = function (node) {
+        return this.nodeTypeMap[node.nodeType] || [];
+    };
+    MultiProvider.prototype.nodeHasBindings = function (node) {
+        return this.providersFor(node).some(function (p) { return p.nodeHasBindings(node); });
+    };
+    MultiProvider.prototype.preprocessNode = function (node) {
+        for (var _i = 0, _a = this.providersFor(node); _i < _a.length; _i++) {
+            var provider = _a[_i];
+            var newNodes = provider.preprocessNode(node);
+            if (newNodes) {
+                return newNodes;
+            }
+        }
+    };
+    MultiProvider.prototype.enumerateProviderBindings = function (node, ctx) {
+        var _i, _a, provider, bindings, _b, _c, _d, key, accessor;
+        return __generator$2(this, function (_e) {
+            switch (_e.label) {
+                case 0:
+                    _i = 0, _a = this.providersFor(node);
+                    _e.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 6];
+                    provider = _a[_i];
+                    bindings = provider.getBindingAccessors(node, ctx) || {};
+                    _b = 0, _c = Object.entries(bindings || {});
+                    _e.label = 2;
+                case 2:
+                    if (!(_b < _c.length)) return [3 /*break*/, 5];
+                    _d = _c[_b], key = _d[0], accessor = _d[1];
+                    return [4 /*yield*/, [key, accessor]];
+                case 3:
+                    _e.sent();
+                    _e.label = 4;
+                case 4:
+                    _b++;
+                    return [3 /*break*/, 2];
+                case 5:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 6: return [2 /*return*/];
+            }
+        });
+    };
+    MultiProvider.prototype.getBindingAccessors = function (node, ctx) {
+        node = this.preprocessNode(node) || node;
+        var bindings = {};
+        for (var _i = 0, _a = this.enumerateProviderBindings(node, ctx); _i < _a.length; _i++) {
+            var _b = _a[_i], key = _b[0], accessor = _b[1];
+            if (key in bindings) {
+                throw new Error("The binding \"" + key + "\" is duplicated by multiple providers");
+            }
+            bindings[key] = accessor;
+        }
+        return bindings;
+    };
+    return MultiProvider;
+}(Provider));
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$7 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$6(d, b) {
+    extendStatics$7(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+function __generator$3(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+
+
+function __values$1(o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+}
+
+var INNER_EXPRESSION = /^([\s\S]*)}}([\s\S]*?)\{\{([\s\S]*)$/;
+var OUTER_EXPRESSION = /^([\s\S]*?)\{\{([\s\S]*)}}([\s\S]*)$/;
+var BINDING_EXPRESSION = /^([^,"'{}()/:[\]\s]+)\s+([^\s:].*)/;
+var Interpolated = /** @class */ (function () {
+    function Interpolated(text) {
+        this.text = text;
+    }
+    Interpolated.prototype.trim = function (string) {
+        return string === null ? '' : string.trim();
+    };
+    return Interpolated;
+}());
+var Expression$1 = /** @class */ (function (_super) {
+    __extends$6(Expression, _super);
+    function Expression() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Expression.prototype.asAttr = function (context, globals, node) {
+        return new Parser().parseExpression(this.text, context, globals, node)();
+    };
+    Expression.prototype.textNodeReplacement = function (textNode) {
+        var text, ownerDocument, firstChar, lastChar, closeComment, binding, matches;
+        return __generator$3(this, function (_a) {
+            switch (_a.label) {
+                case 0:
+                    text = this.trim(this.text);
+                    ownerDocument = textNode ? textNode.ownerDocument : document;
+                    firstChar = text[0];
+                    lastChar = text[text.length - 1];
+                    closeComment = true;
+                    if (firstChar === '#') {
+                        if (lastChar === '/') {
+                            binding = text.slice(1, -1);
+                        }
+                        else {
+                            binding = text.slice(1);
+                            closeComment = false;
+                        }
+                        matches = binding.match(BINDING_EXPRESSION);
+                        if (matches) {
+                            binding = matches[1] + ':' + matches[2];
+                        }
+                    }
+                    else if (firstChar === '/') {
+                        // replace only with a closing comment
+                    }
+                    else if (firstChar === '{' && lastChar === '}') {
+                        binding = 'html:' + this.trim(text.slice(1, -1));
+                    }
+                    else {
+                        binding = 'text:' + this.trim(text);
+                    }
+                    if (!binding) return [3 /*break*/, 2];
+                    return [4 /*yield*/, ownerDocument.createComment('ko ' + binding)];
+                case 1:
+                    _a.sent();
+                    _a.label = 2;
+                case 2:
+                    if (!closeComment) return [3 /*break*/, 4];
+                    return [4 /*yield*/, ownerDocument.createComment('/ko')];
+                case 3:
+                    _a.sent();
+                    _a.label = 4;
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    return Expression;
+}(Interpolated));
+var Text = /** @class */ (function (_super) {
+    __extends$6(Text, _super);
+    function Text() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Text.prototype.asAttr = function () { return this.text; };
+    Text.prototype.textNodeReplacement = function () {
+        return __generator$3(this, function (_a) {
+            switch (_a.label) {
+                case 0: return [4 /*yield*/, document.createTextNode(this.text.replace(/"/g, '\\"'))];
+                case 1:
+                    _a.sent();
+                    return [2 /*return*/];
+            }
+        });
+    };
+    return Text;
+}(Interpolated));
+/**
+ *          Interpolation Parsing
+ */
+function innerParse(text) {
+    var innerMatch, _a, pre, inner, post;
+    return __generator$3(this, function (_b) {
+        switch (_b.label) {
+            case 0:
+                innerMatch = text.match(INNER_EXPRESSION);
+                if (!innerMatch) return [3 /*break*/, 4];
+                _a = innerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];
+                return [5 /*yield**/, __values$1(innerParse(pre))];
+            case 1:
+                _b.sent();
+                return [4 /*yield*/, new Text(inner)];
+            case 2:
+                _b.sent();
+                return [4 /*yield*/, new Expression$1(post)];
+            case 3:
+                _b.sent();
+                return [3 /*break*/, 6];
+            case 4: return [4 /*yield*/, new Expression$1(text)];
+            case 5:
+                _b.sent();
+                _b.label = 6;
+            case 6: return [2 /*return*/];
+        }
+    });
+}
+function parseOuterMatch(outerMatch) {
+    var _a, pre, inner, post;
+    return __generator$3(this, function (_b) {
+        switch (_b.label) {
+            case 0:
+                if (!outerMatch) {
+                    return [2 /*return*/];
+                }
+                _a = outerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];
+                return [4 /*yield*/, new Text(pre)];
+            case 1:
+                _b.sent();
+                return [5 /*yield**/, __values$1(innerParse(inner))];
+            case 2:
+                _b.sent();
+                return [4 /*yield*/, new Text(post)];
+            case 3:
+                _b.sent();
+                return [2 /*return*/];
+        }
+    });
+}
+function parseInterpolation(text) {
+    var _i, _a, textOrExpr;
+    return __generator$3(this, function (_b) {
+        switch (_b.label) {
+            case 0:
+                _i = 0, _a = parseOuterMatch(text.match(OUTER_EXPRESSION));
+                _b.label = 1;
+            case 1:
+                if (!(_i < _a.length)) return [3 /*break*/, 4];
+                textOrExpr = _a[_i];
+                if (!textOrExpr.text) return [3 /*break*/, 3];
+                return [4 /*yield*/, textOrExpr];
+            case 2:
+                _b.sent();
+                _b.label = 3;
+            case 3:
+                _i++;
+                return [3 /*break*/, 1];
+            case 4: return [2 /*return*/];
+        }
+    });
+}
+
+/**
+ * These are bindings that are mapped specific attributes, such as
+ * two-way communication (value/checked) or which have anti-collision
+ * properties (css).
+ */
+var DEFAULT_ATTRIBUTE_BINDING_MAP = {
+    value: 'value',
+    checked: 'checked',
+    "class": 'css'
+};
+/**
+ *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>
+ */
+var AttributeMustacheProvider = /** @class */ (function (_super) {
+    __extends$6(AttributeMustacheProvider, _super);
+    function AttributeMustacheProvider(params) {
+        if (params === void 0) { params = {}; }
+        var _this = _super.call(this, params) || this;
+        _this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);
+        _this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;
+        return _this;
+    }
+    Object.defineProperty(AttributeMustacheProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [1]; } // document.ELEMENT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    AttributeMustacheProvider.prototype.attributesToInterpolate = function (attributes) {
+        var _i, _a, attr;
+        return __generator$3(this, function (_b) {
+            switch (_b.label) {
+                case 0:
+                    _i = 0, _a = Array.from(attributes);
+                    _b.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    attr = _a[_i];
+                    if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) {
+                        return [3 /*break*/, 3];
+                    }
+                    if (!(attr.specified && attr.value.includes('{{'))) return [3 /*break*/, 3];
+                    return [4 /*yield*/, attr];
+                case 2:
+                    _b.sent();
+                    _b.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    AttributeMustacheProvider.prototype.nodeHasBindings = function (node) {
+        return !this.attributesToInterpolate(node.attributes).next().done;
+    };
+    AttributeMustacheProvider.prototype.partsTogether = function (parts, context, node) {
+        var _this = this;
+        var valueToWrite = [];
+        for (var _i = 3; _i < arguments.length; _i++) {
+            valueToWrite[_i - 3] = arguments[_i];
+        }
+        if (parts.length > 1) {
+            return parts
+                .map(function (p) { return unwrap(p.asAttr(context, _this.globals, node)); }).join('');
+        }
+        // It may be a writeable observable e.g. value="{{ value }}".
+        var part = parts[0].asAttr(context, this.globals);
+        if (valueToWrite.length) {
+            part(valueToWrite[0]);
+        }
+        return part;
+    };
+    AttributeMustacheProvider.prototype.attributeBinding = function (name, parts) {
+        return [name, parts];
+    };
+    AttributeMustacheProvider.prototype.bindingParts = function (node, context) {
+        var _i, _a, attr, parts;
+        return __generator$3(this, function (_b) {
+            switch (_b.label) {
+                case 0:
+                    _i = 0, _a = this.attributesToInterpolate(node.attributes);
+                    _b.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    attr = _a[_i];
+                    parts = Array.from(parseInterpolation(attr.value));
+                    if (!parts.length) return [3 /*break*/, 3];
+                    return [4 /*yield*/, this.attributeBinding(attr.name, parts)];
+                case 2:
+                    _b.sent();
+                    _b.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    AttributeMustacheProvider.prototype.getPossibleDirectBinding = function (attrName) {
+        var bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];
+        return bindingName && this.bindingHandlers.get(attrName);
+    };
+    AttributeMustacheProvider.prototype.bindingObjects = function (node, context) {
+        var _this = this;
+        var _loop_1, this_1, _i, _a, _b, attrName, parts;
+        return __generator$3(this, function (_c) {
+            switch (_c.label) {
+                case 0:
+                    _loop_1 = function (attrName, parts) {
+                        var bindingForAttribute, handler, accessorFn, _a;
+                        return __generator$3(this, function (_b) {
+                            switch (_b.label) {
+                                case 0:
+                                    bindingForAttribute = this_1.getPossibleDirectBinding(attrName);
+                                    handler = bindingForAttribute ? attrName : "attr." + attrName;
+                                    accessorFn = bindingForAttribute
+                                        ? function () {
+                                            var v = [];
+                                            for (var _i = 0; _i < arguments.length; _i++) {
+                                                v[_i] = arguments[_i];
+                                            }
+                                            return _this.partsTogether.apply(_this, [parts, context, node].concat(v));
+                                        }
+                                        : function () {
+                                            var v = [];
+                                            for (var _i = 0; _i < arguments.length; _i++) {
+                                                v[_i] = arguments[_i];
+                                            }
+                                            return (_a = {}, _a[attrName] = _this.partsTogether.apply(_this, [parts, context, node].concat(v)), _a);
+                                            var _a;
+                                        };
+                                    node.removeAttribute(attrName);
+                                    return [4 /*yield*/, (_a = {}, _a[handler] = accessorFn, _a)];
+                                case 1:
+                                    _b.sent();
+                                    return [2 /*return*/];
+                            }
+                        });
+                    };
+                    this_1 = this;
+                    _i = 0, _a = this.bindingParts(node, context);
+                    _c.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    _b = _a[_i], attrName = _b[0], parts = _b[1];
+                    return [5 /*yield**/, _loop_1(attrName, parts)];
+                case 2:
+                    _c.sent();
+                    _c.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    AttributeMustacheProvider.prototype.getBindingAccessors = function (node, context) {
+        return Object.assign.apply(Object, [{}].concat(this.bindingObjects(node, context)));
+    };
+    return AttributeMustacheProvider;
+}(Provider));
+
+/**
+ * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.
+ *
+ * This binding must come before the VirtualProvider.
+ */
+var TextMustacheProvider = /** @class */ (function (_super) {
+    __extends$6(TextMustacheProvider, _super);
+    function TextMustacheProvider() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(TextMustacheProvider.prototype, "FOR_NODE_TYPES", {
+        get: function () { return [3]; } // document.TEXT_NODE
+        ,
+        enumerable: true,
+        configurable: true
+    });
+    TextMustacheProvider.prototype.textToNodes = function (textNode) {
+        var parent, isTextarea, hasStash, _i, _a, part;
+        return __generator$3(this, function (_b) {
+            switch (_b.label) {
+                case 0:
+                    parent = textNode.parentNode;
+                    isTextarea = parent && parent.nodeName === 'TEXTAREA';
+                    hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');
+                    if (!hasStash || isTextarea) {
+                        return [2 /*return*/];
+                    }
+                    _i = 0, _a = parseInterpolation(textNode.nodeValue);
+                    _b.label = 1;
+                case 1:
+                    if (!(_i < _a.length)) return [3 /*break*/, 4];
+                    part = _a[_i];
+                    return [5 /*yield**/, __values$1(part.textNodeReplacement(textNode))];
+                case 2:
+                    _b.sent();
+                    _b.label = 3;
+                case 3:
+                    _i++;
+                    return [3 /*break*/, 1];
+                case 4: return [2 /*return*/];
+            }
+        });
+    };
+    TextMustacheProvider.prototype.textInterpolation = function (textNode) {
+        var newNodes = Array.from(this.textToNodes(textNode));
+        if (newNodes.length === 0) {
+            return;
+        }
+        if (textNode.parentNode) {
+            var parent = textNode.parentNode;
+            var n = newNodes.length;
+            for (var i = 0; i < n; ++i) {
+                parent.insertBefore(newNodes[i], textNode);
+            }
+            parent.removeChild(textNode);
+        }
+        return newNodes;
+    };
+    /**
+     * We convert as follows:
+     *
+     *   {{# ... }} into <!-- ko ... -->
+     *   {{/ ... }} into <!-- /ko -->
+     *   {{# ... /}} into <!-- ko ... --><!-- /ko -->
+     *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->
+     *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->
+     *
+     * VirtualProvider can then pick up and do the actual binding.
+     */
+    TextMustacheProvider.prototype.preprocessNode = function (node) {
+        return this.textInterpolation(node);
+    };
+    return TextMustacheProvider;
+}(Provider));
+
+var storedBindingContextDomDataKey = data.nextKey();
+// The bindingContext constructor is only called directly to create the root context. For child
+// contexts, use bindingContext.createChildContext or bindingContext.extend.
+function bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {
+    var self = this, isFunc = typeof (dataItemOrAccessor) == "function" && !isObservable(dataItemOrAccessor), nodes, subscribable$$1;
+    // The binding context object includes static properties for the current, parent, and root view models.
+    // If a view model is actually stored in an observable, the corresponding binding context object, and
+    // any child contexts, must be updated when the view model is changed.
+    function updateContext() {
+        // Most of the time, the context will directly get a view model object, but if a function is given,
+        // we call the function to retrieve the view model. If the function accesses any observables or returns
+        // an observable, the dependency is tracked, and those observables can later cause the binding
+        // context to be updated.
+        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor, dataItem = unwrap(dataItemOrObservable);
+        if (parentContext) {
+            // When a "parent" context is given, register a dependency on the parent context. Thus whenever the
+            // parent context is updated, this context will also be updated.
+            if (parentContext._subscribable)
+                parentContext._subscribable();
+            // Copy $root and any custom properties from the parent context
+            extend(self, parentContext);
+            // Because the above copy overwrites our own properties, we need to reset them.
+            self._subscribable = subscribable$$1;
+        }
+        else {
+            self.$parents = [];
+            self.$root = dataItem;
+            // Export 'ko' in the binding context so it will be available in bindings and templates
+            // even if 'ko' isn't exported as a global, such as when using an AMD loader.
+            // See https://github.com/SteveSanderson/knockout/issues/490
+            self.ko = options.knockoutInstance;
+        }
+        self.$rawData = dataItemOrObservable;
+        self.$data = dataItem;
+        if (dataItemAlias)
+            self[dataItemAlias] = dataItem;
+        // The extendCallback function is provided when creating a child context or extending a context.
+        // It handles the specific actions needed to finish setting up the binding context. Actions in this
+        // function could also add dependencies to this binding context.
+        if (extendCallback)
+            extendCallback(self, parentContext, dataItem);
+        return self.$data;
+    }
+    function disposeWhen() {
+        return nodes && !anyDomNodeIsAttachedToDocument(nodes);
+    }
+    if (settings && settings.exportDependencies) {
+        // The "exportDependencies" option means that the calling code will track any dependencies and re-create
+        // the binding context when they change.
+        updateContext();
+        return;
+    }
+    subscribable$$1 = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });
+    // At this point, the binding context has been initialized, and the "subscribable" computed observable is
+    // subscribed to any observables that were accessed in the process. If there is nothing to track, the
+    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in
+    // the context object.
+    if (subscribable$$1.isActive()) {
+        self._subscribable = subscribable$$1;
+        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed
+        subscribable$$1.equalityComparer = null;
+        // We need to be able to dispose of this computed observable when it's no longer needed. This would be
+        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and
+        // we cannot assume that those nodes have any relation to each other. So instead we track any node that
+        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.
+        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates
+        nodes = [];
+        subscribable$$1._addNode = function (node) {
+            nodes.push(node);
+            addDisposeCallback(node, function (node) {
+                arrayRemoveItem(nodes, node);
+                if (!nodes.length) {
+                    subscribable$$1.dispose();
+                    self._subscribable = subscribable$$1 = undefined;
+                }
+            });
+        };
+    }
+}
+bindingContext.prototype.lookup = function (token, globals, node) {
+    // short circuits
+    switch (token) {
+        case '$element': return node;
+        case '$context': return this;
+        case 'this':
+        case '$data': return this.$data;
+    }
+    var $data = this.$data;
+    // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.
+    if ($data instanceof Object && token in $data) {
+        return $data[token];
+    }
+    if (token in this) {
+        return this[token];
+    }
+    if (token in globals) {
+        return globals[token];
+    }
+    throw new Error("The variable \"" + token + "\" was not found on $data, $context, or globals.");
+};
+// Extend the binding context hierarchy with a new view model object. If the parent context is watching
+// any observables, the new child context will automatically get a dependency on the parent context.
+// But this does not mean that the $data value of the child context will also get updated. If the child
+// view model also depends on the parent view model, you must provide a function that returns the correct
+// view model on each update.
+bindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {
+    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function (self, parentContext) {
+        // Extend the context hierarchy by setting the appropriate pointers
+        self.$parentContext = parentContext;
+        self.$parent = parentContext.$data;
+        self.$parents = (parentContext.$parents || []).slice(0);
+        self.$parents.unshift(self.$parent);
+        if (extendCallback)
+            extendCallback(self);
+    }, settings);
+};
+// Extend the binding context with new custom properties. This doesn't change the context hierarchy.
+// Similarly to "child" contexts, provide a function here to make sure that the correct values are set
+// when an observable view model is updated.
+bindingContext.prototype.extend = function (properties) {
+    // If the parent context references an observable view model, "_subscribable" will always be the
+    // latest view model object. If not, "_subscribable" isn't set, and we can use the static "$data" value.
+    return new bindingContext(this._subscribable || this.$data, this, null, function (self, parentContext) {
+        // This "child" context doesn't directly track a parent observable view model,
+        // so we need to manually set the $rawData value to match the parent.
+        self.$rawData = parentContext.$rawData;
+        extend(self, typeof (properties) === "function" ? properties() : properties);
+    });
+};
+bindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {
+    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { "exportDependencies": true });
+};
+function storedBindingContextForNode(node, bindingContext) {
+    if (arguments.length == 2) {
+        data.set(node, storedBindingContextDomDataKey, bindingContext);
+        if (bindingContext._subscribable)
+            bindingContext._subscribable._addNode(node);
+    }
+    else {
+        return data.get(node, storedBindingContextDomDataKey);
+    }
+}
+// Retrieving binding context from arbitrary nodes
+function contextFor(node) {
+    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)
+    switch (node.nodeType) {
+        case 1:
+        case 8:
+            var context = storedBindingContextForNode(node);
+            if (context)
+                return context;
+            if (node.parentNode)
+                return contextFor(node.parentNode);
+            break;
+    }
+    return undefined;
+}
+function dataFor(node) {
+    var context = contextFor(node);
+    return context ? context.$data : undefined;
+}
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$8 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$1$2(d, b) {
+    extendStatics$8(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+function __generator$4(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+var BindingHandler = /** @class */ (function (_super) {
+    __extends$1$2(BindingHandler, _super);
+    function BindingHandler(params) {
+        var _this = _super.call(this) || this;
+        var $element = params.$element, valueAccessor = params.valueAccessor, allBindings = params.allBindings, $context = params.$context;
+        Object.assign(_this, {
+            valueAccessor: valueAccessor,
+            allBindings: allBindings,
+            $element: $element,
+            $context: $context,
+            $data: $context.$data
+        });
+        _this.anchorTo($element);
+        return _this;
+    }
+    Object.defineProperty(BindingHandler.prototype, "value", {
+        get: function () { return this.valueAccessor(); },
+        set: function (v) { return this.valueAccessor(v); },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(BindingHandler.prototype, "controlsDescendants", {
+        get: function () { return false; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(BindingHandler, "allowVirtualElements", {
+        get: function () { return false; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(BindingHandler, "isBindingHandlerClass", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(BindingHandler.prototype, "bindingCompleted", {
+        /* Overload this for asynchronous bindings or bindings that recursively
+           apply bindings (e.g. components, foreach, template).
+      
+           A binding should be complete when it has run through once, notably
+           in server-side bindings for pre-rendering.
+        */
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    BindingHandler.registerAs = function (name, provider) {
+        if (provider === void 0) { provider = options.bindingProviderInstance; }
+        provider.bindingHandlers.set(name, this);
+    };
+    return BindingHandler;
+}(LifeCycle));
+/**
+ * An AsyncBindingHandler shall call `completeBinding` when the binding
+ * is to be considered complete.
+ */
+var AsyncBindingHandler = /** @class */ (function (_super) {
+    __extends$1$2(AsyncBindingHandler, _super);
+    function AsyncBindingHandler(params) {
+        var _this = _super.call(this, params) || this;
+        _this.bindingCompletion = new options.Promise(function (resolve) { _this.completeBinding = resolve; });
+        return _this;
+    }
+    Object.defineProperty(AsyncBindingHandler.prototype, "bindingCompleted", {
+        get: function () { return this.bindingCompletion; },
+        enumerable: true,
+        configurable: true
+    });
+    return AsyncBindingHandler;
+}(BindingHandler));
+
+/**
+ * We have no guarantees, for users employing legacy bindings,
+ * that it has not been changed with a modification like
+ *
+ *    ko.bindingHandlers[name] = { init: ...}
+ *
+ * ... so we have to keep track by way of a map.
+ */
+var PossibleWeakMap = options.global.WeakMap || Map;
+var legacyBindingMap = new PossibleWeakMap();
+var LegacyBindingHandler = /** @class */ (function (_super) {
+    __extends$1$2(LegacyBindingHandler, _super);
+    function LegacyBindingHandler(params) {
+        var _this = _super.call(this, params) || this;
+        var handler = _this.handler;
+        if (typeof handler.dispose === 'function') {
+            _this.addDisposable(handler);
+        }
+        try {
+            _this.initReturn = handler.init && handler.init.apply(handler, _this.legacyArgs);
+        }
+        catch (e) {
+            params.onError('init', e);
+        }
+        if (typeof handler.update === 'function') {
+            _this.computed(function () {
+                try {
+                    handler.update.apply(handler, _this.legacyArgs);
+                }
+                catch (e) {
+                    params.onError('update', e);
+                }
+            });
+        }
+        return _this;
+    }
+    Object.defineProperty(LegacyBindingHandler.prototype, "legacyArgs", {
+        get: function () {
+            return [
+                this.$element, this.valueAccessor, this.allBindings,
+                this.$data, this.$context
+            ];
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(LegacyBindingHandler.prototype, "controlsDescendants", {
+        get: function () {
+            var objectToTest = this.initReturn || this.handler || {};
+            return objectToTest.controlsDescendantBindings;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    /**
+     * Create a handler instance from the `origin`, which may be:
+     *
+     * 1. an object (becomes LegacyBindingHandler)
+     * 2. a function (becomes LegacyBindingHandler with `init: function`)
+     *
+     * If given an object (the only kind supported in knockout 3.x and before), it
+     * shall draw the `init`, `update`, and `allowVirtualElements` properties
+     */
+    LegacyBindingHandler.getOrCreateFor = function (key, handler) {
+        if (legacyBindingMap.has(handler)) {
+            return legacyBindingMap.get(handler);
+        }
+        var newLegacyHandler = this.createFor(key, handler);
+        legacyBindingMap.set(handler, newLegacyHandler);
+        return newLegacyHandler;
+    };
+    LegacyBindingHandler.createFor = function (key, handler) {
+        if (typeof handler === 'function') {
+            var _a = [handler, handler.dispose], initFn_1 = _a[0], disposeFn_1 = _a[1];
+            return /** @class */ (function (_super) {
+                __extends$1$2(class_1, _super);
+                function class_1() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                Object.defineProperty(class_1.prototype, "handler", {
+                    get: function () {
+                        var init = initFn_1.bind(this);
+                        var dispose = disposeFn_1 ? disposeFn_1.bind(this) : null;
+                        return { init: init, dispose: dispose };
+                    },
+                    enumerable: true,
+                    configurable: true
+                });
+                Object.defineProperty(class_1, "after", {
+                    get: function () { return handler.after; },
+                    enumerable: true,
+                    configurable: true
+                });
+                Object.defineProperty(class_1, "allowVirtualElements", {
+                    get: function () {
+                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];
+                    },
+                    enumerable: true,
+                    configurable: true
+                });
+                return class_1;
+            }(LegacyBindingHandler));
+        }
+        if (typeof handler === 'object') {
+            return /** @class */ (function (_super) {
+                __extends$1$2(class_2, _super);
+                function class_2() {
+                    return _super !== null && _super.apply(this, arguments) || this;
+                }
+                Object.defineProperty(class_2.prototype, "handler", {
+                    get: function () { return handler; },
+                    enumerable: true,
+                    configurable: true
+                });
+                Object.defineProperty(class_2, "after", {
+                    get: function () { return handler.after; },
+                    enumerable: true,
+                    configurable: true
+                });
+                Object.defineProperty(class_2, "allowVirtualElements", {
+                    get: function () {
+                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];
+                    },
+                    enumerable: true,
+                    configurable: true
+                });
+                return class_2;
+            }(LegacyBindingHandler));
+        }
+        throw new Error('The given handler is not an appropriate type.');
+    };
+    return LegacyBindingHandler;
+}(BindingHandler));
+
+/* eslint no-cond-assign: 0 */
+// The following element types will not be recursed into during binding.
+var bindingDoesNotRecurseIntoElementTypes = {
+    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,
+    // because it's unexpected and a potential XSS issue.
+    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer
+    // and because such elements' contents are always intended to be bound in a different context
+    // from where they appear in the document.
+    'script': true,
+    'textarea': true,
+    'template': true
+};
+// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers
+function getBindingHandler(bindingKey) {
+    var handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);
+    if (!handler) {
+        return;
+    }
+    if (handler.isBindingHandlerClass) {
+        return handler;
+    }
+    return LegacyBindingHandler.getOrCreateFor(bindingKey, handler);
+}
+// Returns the valueAccesor function for a binding value
+function makeValueAccessor(value) {
+    return function () {
+        return value;
+    };
+}
+// Returns the value of a valueAccessor function
+function evaluateValueAccessor(valueAccessor) {
+    return valueAccessor();
+}
+// Given a function that returns bindings, create and return a new object that contains
+// binding value-accessors functions. Each accessor function calls the original function
+// so that it always gets the latest value and all dependencies are captured. This is used
+// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.
+function makeAccessorsFromFunction(callback) {
+    return objectMap(dependencyDetection.ignore(callback), function (value, key) {
+        return function () {
+            return callback()[key];
+        };
+    });
+}
+// Given a bindings function or object, create and return a new object that contains
+// binding value-accessors functions. This is used by ko.applyBindingsToNode.
+function makeBindingAccessors(bindings, context, node) {
+    if (typeof bindings === 'function') {
+        return makeAccessorsFromFunction(bindings.bind(null, context, node));
+    }
+    else {
+        return objectMap(bindings, makeValueAccessor);
+    }
+}
+// This function is used if the binding provider doesn't include a getBindingAccessors function.
+// It must be called with 'this' set to the provider instance.
+function getBindingsAndMakeAccessors(node, context) {
+    return makeAccessorsFromFunction(this.getBindings.bind(this, node, context));
+}
+function applyBindingsToDescendantsInternal(bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {
+    var currentChild;
+    var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);
+    var provider = options.bindingProviderInstance;
+    var preprocessNode = provider.preprocessNode;
+    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's
+    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to
+    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that
+    // trigger insertion of <template> contents at that point in the document.
+    if (preprocessNode) {
+        while (currentChild = nextInQueue) {
+            nextInQueue = virtualElements.nextSibling(currentChild);
+            preprocessNode.call(provider, currentChild);
+        }
+        // Reset nextInQueue for the next loop
+        nextInQueue = virtualElements.firstChild(elementOrVirtualElement);
+    }
+    while (currentChild = nextInQueue) {
+        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position
+        nextInQueue = virtualElements.nextSibling(currentChild);
+        applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);
+    }
+}
+function hasBindings(node) {
+    var provider = options.bindingProviderInstance;
+    return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node);
+}
+function applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {
+    // Perf optimisation: Apply bindings only if...
+    // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)
+    //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those
+    // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)
+    var isElement = nodeVerified.nodeType === 1;
+    if (isElement) {
+        virtualElements.normaliseVirtualElementDomStructure(nodeVerified);
+    }
+    var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)
+        hasBindings(nodeVerified); // Case (2)
+    var shouldBindDescendants = (shouldApplyBindings
+        ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)
+        : { shouldBindDescendants: true }).shouldBindDescendants;
+    if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {
+        // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,
+        //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,
+        //    hence bindingContextsMayDifferFromDomParentElement is false
+        //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may
+        //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,
+        //    hence bindingContextsMayDifferFromDomParentElement is true
+        applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);
+    }
+}
+var boundElementDomDataKey = data.nextKey();
+function topologicalSortBindings(bindings) {
+    var results, bindingsConsidered, cyclicDependencyStack, _i, results_1, result;
+    return __generator$4(this, function (_a) {
+        switch (_a.label) {
+            case 0:
+                results = [];
+                bindingsConsidered = {} // A temporary record of which bindings are already in 'result'
+                ;
+                cyclicDependencyStack = [] // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it
+                ;
+                objectForEach(bindings, function pushBinding(bindingKey) {
+                    if (!bindingsConsidered[bindingKey]) {
+                        var binding = getBindingHandler(bindingKey);
+                        if (!binding) {
+                            return;
+                        }
+                        // First add dependencies (if any) of the current binding
+                        if (binding.after) {
+                            cyclicDependencyStack.push(bindingKey);
+                            arrayForEach(binding.after, function (bindingDependencyKey) {
+                                if (!bindings[bindingDependencyKey]) {
+                                    return;
+                                }
+                                if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {
+                                    throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '));
+                                }
+                                else {
+                                    pushBinding(bindingDependencyKey);
+                                }
+                            });
+                            cyclicDependencyStack.length--;
+                        }
+                        // Next add the current binding
+                        results.push([bindingKey, binding]);
+                    }
+                    bindingsConsidered[bindingKey] = true;
+                });
+                _i = 0, results_1 = results;
+                _a.label = 1;
+            case 1:
+                if (!(_i < results_1.length)) return [3 /*break*/, 4];
+                result = results_1[_i];
+                return [4 /*yield*/, result];
+            case 2:
+                _a.sent();
+                _a.label = 3;
+            case 3:
+                _i++;
+                return [3 /*break*/, 1];
+            case 4: return [2 /*return*/];
+        }
+    });
+}
+function applyBindingsToNodeInternal(node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {
+    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified
+    var alreadyBound = data.get(node, boundElementDomDataKey);
+    if (!sourceBindings) {
+        if (alreadyBound) {
+            onBindingError({
+                during: 'apply',
+                errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),
+                element: node,
+                bindingContext: bindingContext$$1
+            });
+            return false;
+        }
+        data.set(node, boundElementDomDataKey, true);
+    }
+    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because
+    // we can easily recover it just by scanning up the node's ancestors in the DOM
+    // (note: here, parent node means "real DOM parent" not "virtual parent", as there's no O(1) way to find the virtual parent)
+    if (!alreadyBound && bindingContextMayDifferFromDomParentElement) {
+        storedBindingContextForNode(node, bindingContext$$1);
+    }
+    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings
+    var bindings;
+    if (sourceBindings && typeof sourceBindings !== 'function') {
+        bindings = sourceBindings;
+    }
+    else {
+        var provider_1 = options.bindingProviderInstance;
+        var getBindings_1 = provider_1.getBindingAccessors || getBindingsAndMakeAccessors;
+        if (provider_1.FOR_NODE_TYPES.includes(node.nodeType)) {
+            // Get the binding from the provider within a computed observable so that we can update the bindings whenever
+            // the binding context is updated or if the binding provider accesses observables.
+            var bindingsUpdater = computed(function () {
+                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings_1.call(provider_1, node, bindingContext$$1);
+                // Register a dependency on the binding context to support observable view models.
+                if (bindings && bindingContext$$1._subscribable) {
+                    bindingContext$$1._subscribable();
+                }
+                return bindings;
+            }, null, { disposeWhenNodeIsRemoved: node });
+            if (!bindings || !bindingsUpdater.isActive()) {
+                bindingsUpdater = null;
+            }
+        }
+    }
+    var bindingHandlerThatControlsDescendantBindings;
+    if (bindings) {
+        var allBindingHandlers = {};
+        data.set(node, 'bindingHandlers', allBindingHandlers);
+        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding
+        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets
+        // the latest binding value and registers a dependency on the binding updater.
+        var getValueAccessor_1 = bindingsUpdater
+            ? function (bindingKey) { return function (optionalValue) {
+                var valueAccessor = bindingsUpdater()[bindingKey];
+                if (arguments.length === 0) {
+                    return evaluateValueAccessor(valueAccessor);
+                }
+                else {
+                    return valueAccessor(optionalValue);
+                }
+            }; } : function (bindingKey) { return bindings[bindingKey]; };
+        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated
+        function allBindings() {
+            return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);
+        }
+        // The following is the 3.x allBindings API
+        allBindings.has = function (key) { return key in bindings; };
+        allBindings.get = function (key) { return bindings[key] && evaluateValueAccessor(getValueAccessor_1(key)); };
+        var _loop_1 = function (key, BindingHandlerClass) {
+            // Go through the sorted bindings, calling init and update for each
+            function reportBindingError(during, errorCaptured) {
+                onBindingError({
+                    during: during,
+                    errorCaptured: errorCaptured,
+                    bindings: bindings,
+                    allBindings: allBindings,
+                    bindingKey: key,
+                    bindingContext: bindingContext$$1,
+                    element: node,
+                    valueAccessor: getValueAccessor_1(key)
+                });
+            }
+            if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {
+                throw new Error("The binding [" + key + "] cannot be used with virtual elements");
+            }
+            try {
+                var bindingHandler = dependencyDetection.ignore(function () {
+                    return new BindingHandlerClass({
+                        allBindings: allBindings,
+                        $element: node,
+                        $context: bindingContext$$1,
+                        onError: reportBindingError,
+                        valueAccessor: function () {
+                            var v = [];
+                            for (var _i = 0; _i < arguments.length; _i++) {
+                                v[_i] = arguments[_i];
+                            }
+                            return getValueAccessor_1(key).apply(void 0, v);
+                        }
+                    });
+                });
+                // Expose the bindings via domData.
+                allBindingHandlers[key] = bindingHandler;
+                if (bindingHandler.controlsDescendants) {
+                    if (bindingHandlerThatControlsDescendantBindings !== undefined) {
+                        throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.');
+                    }
+                    bindingHandlerThatControlsDescendantBindings = key;
+                }
+                if (bindingHandler.bindingCompleted instanceof options.Promise) {
+                    asyncBindingsApplied.add(bindingHandler.bindingCompleted);
+                }
+            }
+            catch (err) {
+                reportBindingError('creation', err);
+            }
+        };
+        for (var _i = 0, _a = topologicalSortBindings(bindings); _i < _a.length; _i++) {
+            var _b = _a[_i], key = _b[0], BindingHandlerClass = _b[1];
+            _loop_1(key, BindingHandlerClass);
+        }
+    }
+    return {
+        shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined
+    };
+}
+function getBindingContext(viewModelOrBindingContext) {
+    return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)
+        ? viewModelOrBindingContext
+        : new bindingContext(viewModelOrBindingContext);
+}
+function applyBindingAccessorsToNode(node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {
+    if (node.nodeType === 1) {
+        virtualElements.normaliseVirtualElementDomStructure(node);
+    }
+    return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied);
+}
+function applyBindingsToNode(node, bindings, viewModelOrBindingContext) {
+    var asyncBindingsApplied = new Set();
+    var context = getBindingContext(viewModelOrBindingContext);
+    applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);
+    return options.Promise.all(asyncBindingsApplied);
+}
+function applyBindingsToDescendants(viewModelOrBindingContext, rootNode) {
+    var asyncBindingsApplied = new Set();
+    if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {
+        applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);
+    }
+    return options.Promise.all(asyncBindingsApplied);
+}
+function applyBindings(viewModelOrBindingContext, rootNode) {
+    var asyncBindingsApplied = new Set();
+    // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.
+    if (!options.jQuery === undefined && options.jQuery) {
+        options.jQuery = options.jQuery;
+    }
+    if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) {
+        throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node');
+    }
+    rootNode = rootNode || options.document.body; // Make "rootNode" parameter optional
+    applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);
+    return options.Promise.all(asyncBindingsApplied);
+}
+function onBindingError(spec) {
+    var error;
+    if (spec.bindingKey) {
+        // During: 'init' or initial 'update'
+        error = spec.errorCaptured;
+        spec.message = 'Unable to process binding "' + spec.bindingKey +
+            '" in binding "' + spec.bindingKey +
+            '"\nMessage: ' + (error.message ? error.message : error);
+    }
+    else {
+        // During: 'apply'
+        error = spec.errorCaptured;
+    }
+    try {
+        extend(error, spec);
+    }
+    catch (e) {
+        // Read-only error e.g. a DOMEXception.
+        spec.stack = error.stack;
+        error = new Error(error.message ? error.message : error);
+        extend(error, spec);
+    }
+    options.onError(error);
+}
+
+/* eslint no-cond-assign: 0 */
+// Objective:
+// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,
+//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node
+// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node
+//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we
+//   previously mapped - retain those nodes, and just insert/delete other ones
+// "callbackAfterAddingNodes" will be invoked after any "mapping"-generated nodes are inserted into the container node
+// You can use this, for example, to activate bindings on those nodes.
+function mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {
+    // Map this array value inside a dependentObservable so we re-map when any dependency changes
+    var mappedNodes = [];
+    var dependentObservable = computed(function () {
+        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];
+        // On subsequent evaluations, just replace the previously-inserted DOM nodes
+        if (mappedNodes.length > 0) {
+            replaceDomNodes(mappedNodes, newMappedNodes);
+            if (callbackAfterAddingNodes)
+                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);
+        }
+        // Replace the contents of the mappedNodes array, thereby updating the record
+        // of which nodes would be deleted if valueToMap was itself later removed
+        mappedNodes.length = 0;
+        arrayPushAll(mappedNodes, newMappedNodes);
+    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function () { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });
+    return { mappedNodes: mappedNodes, dependentObservable: (dependentObservable.isActive() ? dependentObservable : undefined) };
+}
+var lastMappingResultDomDataKey = data.nextKey();
+var deletedItemDummyValue = data.nextKey();
+function setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {
+    // Compare the provided array against the previous one
+    array = array || [];
+    options$$1 = options$$1 || {};
+    var isFirstExecution = data.get(domNode, lastMappingResultDomDataKey) === undefined;
+    var lastMappingResult = data.get(domNode, lastMappingResultDomDataKey) || [];
+    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });
+    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);
+    // Build the new mapping result
+    var newMappingResult = [];
+    var lastMappingResultIndex = 0;
+    var newMappingResultIndex = 0;
+    var nodesToDelete = [];
+    var itemsToProcess = [];
+    var itemsForBeforeRemoveCallbacks = [];
+    var itemsForMoveCallbacks = [];
+    var itemsForAfterAddCallbacks = [];
+    var mapData;
+    function itemMovedOrRetained(editScriptIndex, oldPosition) {
+        mapData = lastMappingResult[oldPosition];
+        if (newMappingResultIndex !== oldPosition)
+            itemsForMoveCallbacks[editScriptIndex] = mapData;
+        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray
+        mapData.indexObservable(newMappingResultIndex++);
+        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);
+        newMappingResult.push(mapData);
+        itemsToProcess.push(mapData);
+    }
+    function callCallback(callback, items) {
+        if (callback) {
+            for (var i = 0, n = items.length; i < n; i++) {
+                if (items[i]) {
+                    arrayForEach(items[i].mappedNodes, function (node) {
+                        callback(node, i, items[i].arrayEntry);
+                    });
+                }
+            }
+        }
+    }
+    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {
+        movedIndex = editScriptItem['moved'];
+        switch (editScriptItem['status']) {
+            case "deleted":
+                if (movedIndex === undefined) {
+                    mapData = lastMappingResult[lastMappingResultIndex];
+                    // Stop tracking changes to the mapping for these nodes
+                    if (mapData.dependentObservable) {
+                        mapData.dependentObservable.dispose();
+                        mapData.dependentObservable = undefined;
+                    }
+                    // Queue these nodes for later removal
+                    if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {
+                        if (options$$1['beforeRemove']) {
+                            newMappingResult.push(mapData);
+                            itemsToProcess.push(mapData);
+                            if (mapData.arrayEntry === deletedItemDummyValue) {
+                                mapData = null;
+                            }
+                            else {
+                                itemsForBeforeRemoveCallbacks[i] = mapData;
+                            }
+                        }
+                        if (mapData) {
+                            nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);
+                        }
+                    }
+                }
+                lastMappingResultIndex++;
+                break;
+            case "retained":
+                itemMovedOrRetained(i, lastMappingResultIndex++);
+                break;
+            case "added":
+                if (movedIndex !== undefined) {
+                    itemMovedOrRetained(i, movedIndex);
+                }
+                else {
+                    mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };
+                    newMappingResult.push(mapData);
+                    itemsToProcess.push(mapData);
+                    if (!isFirstExecution)
+                        itemsForAfterAddCallbacks[i] = mapData;
+                }
+                break;
+        }
+    }
+    // Store a copy of the array items we just considered so we can difference it next time
+    data.set(domNode, lastMappingResultDomDataKey, newMappingResult);
+    // Call beforeMove first before any changes have been made to the DOM
+    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);
+    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)
+    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);
+    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)
+    i = 0;
+    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {
+        // Get nodes for newly added items
+        if (!mapData.mappedNodes)
+            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));
+        // Put nodes in the right place if they aren't there already
+        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {
+            if (node !== nextNode)
+                virtualElements.insertAfter(domNode, node, lastNode);
+        }
+        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)
+        if (!mapData.initialized && callbackAfterAddingNodes) {
+            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);
+            mapData.initialized = true;
+        }
+    }
+    // If there's a beforeRemove callback, call it after reordering.
+    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using
+    // some sort of animation, which is why we first reorder the nodes that will be removed. If the
+    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.
+    // Perhaps we'll make that change in the future if this scenario becomes more common.
+    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);
+    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item
+    // as already "removed" so we won't call beforeRemove for it again, and it ensures that the item won't match up
+    // with an actual item in the array and appear as "retained" or "moved".
+    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {
+        if (itemsForBeforeRemoveCallbacks[i]) {
+            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;
+        }
+    }
+    // Finally call afterMove and afterAdd callbacks
+    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);
+    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);
+}
+
+var attr = {
+    update: function (element, valueAccessor, allBindings) {
+        var value = unwrap(valueAccessor()) || {};
+        objectForEach(value, function (attrName, attrValue) {
+            attrValue = unwrap(attrValue);
+            // Find the namespace of this attribute, if any.
+            // Defaulting to `null` should be ok, as
+            //
+            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )
+            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )
+            //
+            var prefixLen = attrName.indexOf(':');
+            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI(attrName.substr(0, prefixLen));
+            // To cover cases like "attr: { checked:someProp }", we want to remove the attribute entirely
+            // when someProp is a "no value"-like value (strictly null, false, or undefined)
+            // (because the absence of the "checked" attr is how to mark an element as not checked, etc.)
+            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);
+            if (toRemove) {
+                element.removeAttributeNS(namespace, attrName);
+            }
+            else {
+                element.setAttributeNS(namespace, attrName, attrValue.toString());
+            }
+            // Treat "name" specially - although you can think of it as an attribute, it also needs
+            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)
+            // Deliberately being case-sensitive here because XHTML would regard "Name" as a different thing
+            // entirely, and there's no strong reason to allow for such casing in HTML.
+            if (attrName === "name") {
+                setElementName(element, toRemove ? "" : attrValue.toString());
+            }
+        });
+    }
+};
+
+var checked = {
+    after: ['value', 'attr'],
+    init: function (element, valueAccessor, allBindings) {
+        var checkedValue = pureComputed(function () {
+            // Treat "value" like "checkedValue" when it is included with "checked" binding
+            if (allBindings['has']('checkedValue')) {
+                return unwrap(allBindings.get('checkedValue'));
+            }
+            else if (allBindings['has']('value')) {
+                return unwrap(allBindings.get('value'));
+            }
+            return element.value;
+        });
+        function updateModel() {
+            // This updates the model value from the view value.
+            // It runs in response to DOM events (click) and changes in checkedValue.
+            var isChecked = element.checked, elemValue = useCheckedValue ? checkedValue() : isChecked;
+            // When we're first setting up this computed, don't change any model state.
+            if (dependencyDetection.isInitial()) {
+                return;
+            }
+            // We can ignore unchecked radio buttons, because some other radio
+            // button will be getting checked, and that one can take care of updating state.
+            if (isRadio && !isChecked) {
+                return;
+            }
+            var modelValue = dependencyDetection.ignore(valueAccessor);
+            if (valueIsArray) {
+                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;
+                if (oldElemValue !== elemValue) {
+                    // When we're responding to the checkedValue changing, and the element is
+                    // currently checked, replace the old elem value with the new elem value
+                    // in the model array.
+                    if (isChecked) {
+                        addOrRemoveItem(writableValue, elemValue, true);
+                        addOrRemoveItem(writableValue, oldElemValue, false);
+                    }
+                    oldElemValue = elemValue;
+                }
+                else {
+                    // When we're responding to the user having checked/unchecked a checkbox,
+                    // add/remove the element value to the model array.
+                    addOrRemoveItem(writableValue, elemValue, isChecked);
+                }
+                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {
+                    modelValue(writableValue);
+                }
+            }
+            else {
+                valueAccessor(elemValue, { onlyIfChanged: true });
+            }
+        }
+        
+        function updateView() {
+            // This updates the view value from the model value.
+            // It runs in response to changes in the bound (checked) value.
+            var modelValue = unwrap(valueAccessor());
+            if (valueIsArray) {
+                // When a checkbox is bound to an array, being checked represents its value being present in that array
+                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;
+            }
+            else if (isCheckbox) {
+                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish
+                element.checked = modelValue;
+            }
+            else {
+                // For radio buttons, being checked means that the radio button's value corresponds to the model value
+                element.checked = (checkedValue() === modelValue);
+            }
+        }
+        
+        var isCheckbox = element.type == "checkbox", isRadio = element.type == "radio";
+        // Only bind to check boxes and radio buttons
+        if (!isCheckbox && !isRadio) {
+            return;
+        }
+        var rawValue = valueAccessor(), valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array), rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice), oldElemValue = valueIsArray ? checkedValue() : undefined, useCheckedValue = isRadio || valueIsArray;
+        // Set up two computeds to update the binding:
+        // The first responds to changes in the checkedValue value and to element clicks
+        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });
+        registerEventHandler(element, "click", updateModel);
+        // The second responds to changes in the model value (the one associated with the checked binding)
+        computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+        rawValue = undefined;
+    }
+};
+var checkedValue = {
+    update: function (element, valueAccessor) {
+        element.value = unwrap(valueAccessor());
+    }
+};
+
+// For certain common events (currently just 'click'), allow a simplified data-binding syntax
+// e.g. click:handler instead of the usual full-length event:{click:handler}
+function makeEventHandlerShortcut(eventName) {
+    return {
+        init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+            var newValueAccessor = function () {
+                var result = {};
+                result[eventName] = valueAccessor();
+                return result;
+            };
+            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext$$1);
+        }
+    };
+}
+var eventHandler = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        var eventsToHandle = valueAccessor() || {};
+        objectForEach(eventsToHandle, function (eventName) {
+            if (typeof eventName == "string") {
+                registerEventHandler(element, eventName, function (event) {
+                    var handlerReturnValue;
+                    var handlerFunction = valueAccessor()[eventName];
+                    if (!handlerFunction)
+                        return;
+                    try {
+                        // Take all the event args, and prefix with the viewmodel
+                        var argsForHandler = makeArray(arguments);
+                        viewModel = bindingContext$$1['$data'];
+                        argsForHandler.unshift(viewModel);
+                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);
+                    }
+                    finally {
+                        if (handlerReturnValue !== true) {
+                            if (event.preventDefault)
+                                event.preventDefault();
+                            else
+                                event.returnValue = false;
+                        }
+                    }
+                    var bubble = allBindings.get(eventName + 'Bubble') !== false;
+                    if (!bubble) {
+                        event.cancelBubble = true;
+                        if (event.stopPropagation)
+                            event.stopPropagation();
+                    }
+                });
+            }
+        });
+    }
+};
+var onHandler = {
+    init: eventHandler.init,
+    preprocess: function (value, key, addBinding) {
+        addBinding(key.replace('on.', ''), '=>' + value);
+    }
+};
+
+// 'click' is just a shorthand for the usual full-length event:{click:handler}
+var click = makeEventHandlerShortcut('click');
+
+var css = {
+    aliases: ['class'],
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        if (value !== null && typeof value == "object") {
+            objectForEach(value, function (className, shouldHaveClass) {
+                shouldHaveClass = unwrap(shouldHaveClass);
+                toggleDomNodeCssClass(element, className, shouldHaveClass);
+            });
+        }
+        else {
+            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value
+            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);
+            element[css.classesWrittenByBindingKey] = value;
+            toggleDomNodeCssClass(element, value, true);
+        }
+    },
+    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')
+};
+
+var enable = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        if (value && element.disabled) {
+            element.removeAttribute("disabled");
+        }
+        else if ((!value) && (!element.disabled)) {
+            element.disabled = true;
+        }
+    }
+};
+var disable = {
+    update: function (element, valueAccessor) {
+        enable.update(element, function () { return !unwrap(valueAccessor()); });
+    }
+};
+
+var hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');
+var hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');
+var hasfocus = {
+    init: function (element, valueAccessor /*, allBindings */) {
+        var handleElementFocusChange = function (isFocused) {
+            // Where possible, ignore which event was raised and determine focus state using activeElement,
+            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.
+            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,
+            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus
+            // from calling 'blur()' on the element when it loses focus.
+            // Discussion at https://github.com/SteveSanderson/knockout/pull/352
+            element[hasfocusUpdatingProperty] = true;
+            var ownerDoc = element.ownerDocument;
+            if ("activeElement" in ownerDoc) {
+                var active;
+                try {
+                    active = ownerDoc.activeElement;
+                }
+                catch (e) {
+                    // IE9 throws if you access activeElement during page load (see issue #703)
+                    active = ownerDoc.body;
+                }
+                isFocused = (active === element);
+            }
+            // var modelValue = valueAccessor();
+            valueAccessor(isFocused, { onlyIfChanged: true });
+            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function
+            element[hasfocusLastValue] = isFocused;
+            element[hasfocusUpdatingProperty] = false;
+        };
+        var handleElementFocusIn = handleElementFocusChange.bind(null, true);
+        var handleElementFocusOut = handleElementFocusChange.bind(null, false);
+        registerEventHandler(element, "focus", handleElementFocusIn);
+        registerEventHandler(element, "focusin", handleElementFocusIn); // For IE
+        registerEventHandler(element, "blur", handleElementFocusOut);
+        registerEventHandler(element, "focusout", handleElementFocusOut); // For IE
+    },
+    update: function (element, valueAccessor) {
+        var value = !!unwrap(valueAccessor());
+        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {
+            value ? element.focus() : element.blur();
+            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).
+            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current
+            // element was focused already.
+            if (!value && element[hasfocusLastValue]) {
+                element.ownerDocument.body.focus();
+            }
+            // For IE, which doesn't reliably fire "focus" or "blur" events synchronously
+            dependencyDetection.ignore(triggerEvent, null, [element, value ? "focusin" : "focusout"]);
+        }
+    }
+};
+
+var html = {
+    init: function () {
+        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)
+        return {
+            'controlsDescendantBindings': true
+        };
+    },
+    //
+    // Modify internal, per ko.punches and :
+    //      http://stackoverflow.com/a/15348139
+    update: function (element, valueAccessor) {
+        setHtml(element, valueAccessor());
+    },
+    allowVirtualElements: true
+};
+
+var $let = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        // Make a modified binding context, with extra properties, and apply it to descendant elements
+        var innerContext = bindingContext$$1['extend'](valueAccessor);
+        applyBindingsToDescendants(innerContext, element);
+        return { 'controlsDescendantBindings': true };
+    },
+    allowVirtualElements: true
+};
+
+var hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';
+// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values
+// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values
+// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.
+var selectExtensions = {
+    optionsValueDomDataKey: undefined,
+    readValue: function (element) {
+        switch (tagNameLower(element)) {
+            case 'option':
+                if (element[hasDomDataExpandoProperty] === true)
+                    return data.get(element, selectExtensions.optionValueDomDataKey);
+                return element.value;
+            case 'select':
+                return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;
+            default:
+                return element.value;
+        }
+    },
+    writeValue: function (element, value, allowUnset) {
+        switch (tagNameLower(element)) {
+            case 'option':
+                switch (typeof value) {
+                    case "string":
+                        data.set(element, selectExtensions.optionValueDomDataKey, undefined);
+                        if (hasDomDataExpandoProperty in element) {
+                            delete element[hasDomDataExpandoProperty];
+                        }
+                        element.value = value;
+                        break;
+                    default:
+                        // Store arbitrary object using DomData
+                        data.set(element, selectExtensions.optionValueDomDataKey, value);
+                        element[hasDomDataExpandoProperty] = true;
+                        // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.
+                        element.value = typeof value === "number" ? value : "";
+                        break;
+                }
+                break;
+            case 'select':
+                if (value === "" || value === null)
+                    value = undefined;
+                var selection = -1;
+                for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {
+                    optionValue = selectExtensions.readValue(element.options[i]);
+                    // Include special check to handle selecting a caption with a blank string value
+                    if (optionValue == value || (optionValue === "" && value === undefined)) {
+                        selection = i;
+                        break;
+                    }
+                }
+                if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {
+                    element.selectedIndex = selection;
+                }
+                break;
+            default:
+                if ((value === null) || (value === undefined))
+                    value = "";
+                element.value = value;
+                break;
+        }
+    }
+};
+
+var captionPlaceholder = {};
+var options$1 = {
+    init: function (element) {
+        if (tagNameLower(element) !== "select")
+            throw new Error("options binding applies only to SELECT elements");
+        // Remove all existing <option>s.
+        while (element.length > 0) {
+            element.remove(0);
+        }
+        // Ensures that the binding processor doesn't try to bind the options
+        return { 'controlsDescendantBindings': true };
+    },
+    update: function (element, valueAccessor, allBindings) {
+        function selectedOptions() {
+            return arrayFilter(element.options, function (node) { return node.selected; });
+        }
+        var selectWasPreviouslyEmpty = element.length == 0, multiple = element.multiple, previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null, unwrappedArray = unwrap(valueAccessor()), valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'), includeDestroyed = allBindings.get('optionsIncludeDestroyed'), arrayToDomNodeChildrenOptions = {}, captionValue, filteredArray, previousSelectedValues = [];
+        if (!valueAllowUnset) {
+            if (multiple) {
+                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);
+            }
+            else if (element.selectedIndex >= 0) {
+                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));
+            }
+        }
+        if (unwrappedArray) {
+            if (typeof unwrappedArray.length == "undefined")
+                unwrappedArray = [unwrappedArray];
+            // Filter out any entries marked as destroyed
+            filteredArray = arrayFilter(unwrappedArray, function (item) {
+                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);
+            });
+            // If caption is included, add it to the array
+            if (allBindings['has']('optionsCaption')) {
+                captionValue = unwrap(allBindings.get('optionsCaption'));
+                // If caption value is null or undefined, don't show a caption
+                if (captionValue !== null && captionValue !== undefined) {
+                    filteredArray.unshift(captionPlaceholder);
+                }
+            }
+        }
+        else {
+            // If a falsy value is provided (e.g. null), we'll simply empty the select element
+        }
+        function applyToObject(object, predicate, defaultValue) {
+            var predicateType = typeof predicate;
+            if (predicateType == "function")
+                return predicate(object);
+            else if (predicateType == "string")
+                return object[predicate];
+            else
+                return defaultValue;
+        }
+        // The following functions can run at two different times:
+        // The first is when the whole array is being updated directly from this binding handler.
+        // The second is when an observable value for a specific array entry is updated.
+        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.
+        var itemUpdate = false;
+        function optionForArrayItem(arrayEntry, index, oldOptions) {
+            if (oldOptions.length) {
+                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [selectExtensions.readValue(oldOptions[0])] : [];
+                itemUpdate = true;
+            }
+            var option = element.ownerDocument.createElement("option");
+            if (arrayEntry === captionPlaceholder) {
+                setTextContent(option, allBindings.get('optionsCaption'));
+                selectExtensions.writeValue(option, undefined);
+            }
+            else {
+                // Apply a value to the option element
+                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);
+                selectExtensions.writeValue(option, unwrap(optionValue));
+                // Apply some text to the option element
+                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);
+                setTextContent(option, optionText);
+            }
+            return [option];
+        }
+        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection
+        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208
+        arrayToDomNodeChildrenOptions['beforeRemove'] =
+            function (option) {
+                element.removeChild(option);
+            };
+        function setSelectionCallback(arrayEntry, newOptions) {
+            if (itemUpdate && valueAllowUnset) {
+                // The model value is authoritative, so make sure its value is the one selected
+                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.
+                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);
+            }
+            else if (previousSelectedValues.length) {
+                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.
+                // That's why we first added them without selection. Now it's time to set the selection.
+                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;
+                setOptionNodeSelectionState(newOptions[0], isSelected);
+                // If this option was changed from being selected during a single-item update, notify the change
+                if (itemUpdate && !isSelected) {
+                    dependencyDetection.ignore(triggerEvent, null, [element, "change"]);
+                }
+            }
+        }
+        var callback = setSelectionCallback;
+        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == "function") {
+            callback = function (arrayEntry, newOptions) {
+                setSelectionCallback(arrayEntry, newOptions);
+                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);
+            };
+        }
+        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);
+        dependencyDetection.ignore(function () {
+            if (valueAllowUnset) {
+                // The model value is authoritative, so make sure its value is the one selected
+                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);
+            }
+            else {
+                // Determine if the selection has changed as a result of updating the options list
+                var selectionChanged;
+                if (multiple) {
+                    // For a multiple-select box, compare the new selection count to the previous one
+                    // But if nothing was selected before, the selection can't have changed
+                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;
+                }
+                else {
+                    // For a single-select box, compare the current value to the previous value
+                    // But if nothing was selected before or nothing is selected now, just look for a change in selection
+                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)
+                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])
+                        : (previousSelectedValues.length || element.selectedIndex >= 0);
+                }
+                // Ensure consistency between model value and selected option.
+                // If the dropdown was changed so that selection is no longer the same,
+                // notify the value or selectedOptions binding.
+                if (selectionChanged) {
+                    triggerEvent(element, "change");
+                }
+            }
+        });
+        // Workaround for IE bug
+        ensureSelectElementIsRenderedCorrectly(element);
+        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)
+            element.scrollTop = previousScrollTop;
+    }
+};
+selectExtensions.optionValueDomDataKey = data.nextKey();
+
+var selectedOptions = {
+    after: ['options', 'foreach'],
+    init: function (element, valueAccessor, allBindings) {
+        registerEventHandler(element, "change", function () {
+            var value = valueAccessor(), valueToWrite = [];
+            arrayForEach(element.getElementsByTagName("option"), function (node) {
+                if (node.selected)
+                    valueToWrite.push(selectExtensions.readValue(node));
+            });
+            valueAccessor(valueToWrite);
+        });
+    },
+    update: function (element, valueAccessor) {
+        if (tagNameLower(element) != "select")
+            throw new Error("values binding applies only to SELECT elements");
+        var newValue = unwrap(valueAccessor()), previousScrollTop = element.scrollTop;
+        if (newValue && typeof newValue.length == "number") {
+            arrayForEach(element.getElementsByTagName("option"), function (node) {
+                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;
+                if (node.selected != isSelected) {
+                    setOptionNodeSelectionState(node, isSelected);
+                }
+            });
+        }
+        element.scrollTop = previousScrollTop;
+    }
+};
+
+var style = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor() || {});
+        objectForEach(value, function (styleName, styleValue) {
+            styleValue = unwrap(styleValue);
+            if (styleValue === null || styleValue === undefined || styleValue === false) {
+                // Empty string removes the value, whereas null/undefined have no effect
+                styleValue = "";
+            }
+            element.style[styleName] = styleValue;
+        });
+    }
+};
+
+var submit = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        if (typeof valueAccessor() != "function")
+            throw new Error("The value for a submit binding must be a function");
+        registerEventHandler(element, "submit", function (event) {
+            var handlerReturnValue;
+            var value = valueAccessor();
+            try {
+                handlerReturnValue = value.call(bindingContext$$1['$data'], element);
+            }
+            finally {
+                if (handlerReturnValue !== true) {
+                    if (event.preventDefault)
+                        event.preventDefault();
+                    else
+                        event.returnValue = false;
+                }
+            }
+        });
+    }
+};
+
+var text = {
+    init: function () {
+        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).
+        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.
+        return { controlsDescendantBindings: true };
+    },
+    update: function (element, valueAccessor) {
+        setTextContent(element, valueAccessor());
+    },
+    allowVirtualElements: true
+};
+
+var parseVersion;
+var operaVersion;
+var userAgent;
+var safariVersion;
+var firefoxVersion;
+var w$1 = options.global;
+if (w$1.navigator) {
+    parseVersion = function (matches) {
+        if (matches) {
+            return parseFloat(matches[1]);
+        }
+    };
+    // Detect various browser versions because some old versions don't fully support the 'input' event
+    operaVersion = w$1.opera && w$1.opera.version && parseInt(w$1.opera.version()),
+        userAgent = w$1.navigator.userAgent,
+        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\/([^ ]*) safari/i)),
+        firefoxVersion = parseVersion(userAgent.match(/Firefox\/([^ ]*)/));
+}
+// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.
+// But it does fire the 'selectionchange' event on many of those, presumably because the
+// cursor is moving and that counts as the selection changing. The 'selectionchange' event is
+// fired at the document level only and doesn't directly indicate which element changed. We
+// set up just one event handler for the document and use 'activeElement' to determine which
+// element was changed.
+if (ieVersion < 10) {
+    var selectionChangeRegisteredName = data.nextKey(), selectionChangeHandlerName = data.nextKey();
+    var selectionChangeHandler = function (event) {
+        var target = this.activeElement, handler = target && data.get(target, selectionChangeHandlerName);
+        if (handler) {
+            handler(event);
+        }
+    };
+    var registerForSelectionChangeEvent = function (element, handler) {
+        var ownerDoc = element.ownerDocument;
+        if (!data.get(ownerDoc, selectionChangeRegisteredName)) {
+            data.set(ownerDoc, selectionChangeRegisteredName, true);
+            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);
+        }
+        data.set(element, selectionChangeHandlerName, handler);
+    };
+}
+var textInput = {
+    aliases: 'textinput',
+    init: function (element, valueAccessor) {
+        var previousElementValue = element.value, timeoutHandle, elementValueBeforeEvent;
+        var updateModel = function (event) {
+            clearTimeout(timeoutHandle);
+            elementValueBeforeEvent = timeoutHandle = undefined;
+            var elementValue = element.value;
+            if (previousElementValue !== elementValue) {
+                // Provide a way for tests to know exactly which event was processed
+                if (options.debug && event)
+                    element['_ko_textInputProcessedEvent'] = event.type;
+                previousElementValue = elementValue;
+                valueAccessor(elementValue);
+            }
+        };
+        var deferUpdateModel = function (event) {
+            if (!timeoutHandle) {
+                // The elementValueBeforeEvent variable is set *only* during the brief gap between an
+                // event firing and the updateModel function running. This allows us to ignore model
+                // updates that are from the previous state of the element, usually due to techniques
+                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.
+                elementValueBeforeEvent = element.value;
+                var handler = options.debug ? updateModel.bind(element, { type: event.type }) : updateModel;
+                timeoutHandle = safeSetTimeout(handler, 4);
+            }
+        };
+        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);
+        // so we'll make sure all updates are asynchronous
+        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;
+        var updateView = function () {
+            var modelValue = unwrap(valueAccessor());
+            if (modelValue === null || modelValue === undefined) {
+                modelValue = '';
+            }
+            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {
+                safeSetTimeout(updateView, 4);
+                return;
+            }
+            // Update the element only if the element and model are different. On some browsers, updating the value
+            // will move the cursor to the end of the input, which would be bad while the user is typing.
+            if (element.value !== modelValue) {
+                previousElementValue = modelValue; // Make sure we ignore events (propertychange) that result from updating the value
+                element.value = modelValue;
+            }
+        };
+        var onEvent = function (event, handler) {
+            registerEventHandler(element, event, handler);
+        };
+        if (options.debug && textInput._forceUpdateOn) {
+            // Provide a way for tests to specify exactly which events are bound
+            arrayForEach(textInput._forceUpdateOn, function (eventName) {
+                if (eventName.slice(0, 5) == 'after') {
+                    onEvent(eventName.slice(5), deferUpdateModel);
+                }
+                else {
+                    onEvent(eventName, updateModel);
+                }
+            });
+        }
+        else {
+            if (ieVersion < 10) {
+                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever
+                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,
+                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it
+                // when using autocomplete, we'll use 'propertychange' for it also.
+                onEvent('propertychange', function (event) {
+                    if (event.propertyName === 'value') {
+                        ieUpdateModel(event);
+                    }
+                });
+                if (ieVersion == 8) {
+                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from
+                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following
+                    // events too.
+                    onEvent('keyup', updateModel); // A single keystoke
+                    onEvent('keydown', updateModel); // The first character when a key is held down
+                }
+                if (ieVersion >= 8) {
+                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using
+                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text
+                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'
+                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.
+                    // These are also needed in IE8 because of the bug described above.
+                    registerForSelectionChangeEvent(element, ieUpdateModel); // 'selectionchange' covers cut, paste, drop, delete, etc.
+                    onEvent('dragend', deferUpdateModel);
+                }
+            }
+            else {
+                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed
+                // through the user interface.
+                onEvent('input', updateModel);
+                if (safariVersion < 5 && tagNameLower(element) === "textarea") {
+                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'
+                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.
+                    onEvent('keydown', deferUpdateModel);
+                    onEvent('paste', deferUpdateModel);
+                    onEvent('cut', deferUpdateModel);
+                }
+                else if (operaVersion < 11) {
+                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.
+                    // We can try to catch some of those using 'keydown'.
+                    onEvent('keydown', deferUpdateModel);
+                }
+                else if (firefoxVersion < 4.0) {
+                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete
+                    onEvent('DOMAutoComplete', updateModel);
+                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.
+                    onEvent('dragdrop', updateModel); // <3.5
+                    onEvent('drop', updateModel); // 3.5
+                }
+            }
+        }
+        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.
+        onEvent('change', updateModel);
+        computed(updateView, null, { disposeWhenNodeIsRemoved: element });
+    }
+};
+// // textinput is an alias for textInput
+// ko.bindingHandlers['textinput'] = {
+//     // preprocess is the only way to set up a full alias
+//     'preprocess': function (value, name, addBinding) {
+//         addBinding('textInput', value);
+//     }
+// };
+
+var uniqueName = {
+    init: function (element, valueAccessor) {
+        if (valueAccessor()) {
+            var name = "ko_unique_" + (++uniqueName.currentIndex);
+            setElementName(element, name);
+        }
+    },
+    currentIndex: 0
+};
+
+var value = {
+    after: ['options', 'foreach'],
+    init: function (element, valueAccessor, allBindings) {
+        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit
+        if (element.tagName.toLowerCase() == "input" && (element.type == "checkbox" || element.type == "radio")) {
+            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });
+            return;
+        }
+        // Always catch "change" event; possibly other events too if asked
+        var eventsToCatch = ["change"];
+        var requestedEventsToCatch = allBindings.get("valueUpdate");
+        var propertyChangedFired = false;
+        var elementValueBeforeEvent = null;
+        if (requestedEventsToCatch) {
+            if (typeof requestedEventsToCatch == "string")
+                requestedEventsToCatch = [requestedEventsToCatch];
+            arrayPushAll(eventsToCatch, requestedEventsToCatch);
+            eventsToCatch = arrayGetDistinctValues(eventsToCatch);
+        }
+        var valueUpdateHandler = function () {
+            elementValueBeforeEvent = null;
+            propertyChangedFired = false;
+            var modelValue = valueAccessor();
+            var elementValue = selectExtensions.readValue(element);
+            valueAccessor(elementValue);
+        };
+        // Workaround for https://github.com/SteveSanderson/knockout/issues/122
+        // IE doesn't fire "change" events on textboxes if the user selects a value from its autocomplete list
+        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == "input" && element.type == "text"
+            && element.autocomplete != "off" && (!element.form || element.form.autocomplete != "off");
+        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, "propertychange") == -1) {
+            registerEventHandler(element, "propertychange", function () { propertyChangedFired = true; });
+            registerEventHandler(element, "focus", function () { propertyChangedFired = false; });
+            registerEventHandler(element, "blur", function () {
+                if (propertyChangedFired) {
+                    valueUpdateHandler();
+                }
+            });
+        }
+        arrayForEach(eventsToCatch, function (eventName) {
+            // The syntax "after<eventname>" means "run the handler asynchronously after the event"
+            // This is useful, for example, to catch "keydown" events after the browser has updated the control
+            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)
+            var handler = valueUpdateHandler;
+            if (stringStartsWith(eventName, "after")) {
+                handler = function () {
+                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between
+                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen
+                    // at the earliest asynchronous opportunity. We store this temporary information so that
+                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,
+                    // we can overwrite that model value change with the value the user just typed. Otherwise,
+                    // techniques like rateLimit can trigger model changes at critical moments that will
+                    // override the user's inputs, causing keystrokes to be lost.
+                    elementValueBeforeEvent = selectExtensions.readValue(element);
+                    safeSetTimeout(valueUpdateHandler, 0);
+                };
+                eventName = eventName.substring("after".length);
+            }
+            registerEventHandler(element, eventName, handler);
+        });
+        var updateFromModel = function () {
+            var newValue = unwrap(valueAccessor());
+            var elementValue = selectExtensions.readValue(element);
+            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {
+                safeSetTimeout(updateFromModel, 0);
+                return;
+            }
+            var valueHasChanged = (newValue !== elementValue);
+            if (valueHasChanged) {
+                if (tagNameLower(element) === "select") {
+                    var allowUnset = allBindings.get('valueAllowUnset');
+                    var applyValueAction = function () {
+                        selectExtensions.writeValue(element, newValue, allowUnset);
+                    };
+                    applyValueAction();
+                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {
+                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,
+                        // because you're not allowed to have a model value that disagrees with a visible UI selection.
+                        dependencyDetection.ignore(triggerEvent, null, [element, "change"]);
+                    }
+                    else {
+                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread
+                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread
+                        // to apply the value as well.
+                        safeSetTimeout(applyValueAction, 0);
+                    }
+                }
+                else {
+                    selectExtensions.writeValue(element, newValue);
+                }
+            }
+        };
+        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });
+    }
+};
+
+var visible = {
+    update: function (element, valueAccessor) {
+        var value = unwrap(valueAccessor());
+        var isCurrentlyVisible = !(element.style.display == "none");
+        if (value && !isCurrentlyVisible)
+            element.style.display = "";
+        else if ((!value) && isCurrentlyVisible)
+            element.style.display = "none";
+    }
+};
+var hidden = {
+    update: function (element, valueAccessor) {
+        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });
+    }
+};
+
+var using = {
+    init: function (element, valueAccessor, allBindings, viewModel, bindingContext$$1) {
+        var innerContext = bindingContext$$1.createChildContext(valueAccessor);
+        applyBindingsToDescendants(innerContext, element);
+        return { controlsDescendantBindings: true };
+    },
+    allowVirtualElements: true
+};
+
+var bindings = {
+    attr: attr,
+    checked: checked,
+    checkedValue: checkedValue,
+    click: click,
+    css: css, 'class': css,
+    enable: enable,
+    'event': eventHandler,
+    disable: disable,
+    hasfocus: hasfocus, hasFocus: hasfocus,
+    hidden: hidden,
+    html: html,
+    'let': $let,
+    on: onHandler,
+    options: options$1,
+    selectedOptions: selectedOptions,
+    style: style,
+    submit: submit,
+    text: text,
+    textInput: textInput,
+    textinput: textInput,
+    uniqueName: uniqueName,
+    using: using,
+    value: value,
+    visible: visible
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$9 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$7(d, b) {
+    extendStatics$9(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving
+// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)
+//
+// Two are provided by default:
+//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element
+//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but
+//                                           without reading/writing the actual element text content, since it will be overwritten
+//                                           with the rendered template output.
+// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.
+// Template sources need to have the following functions:
+//   text() 			- returns the template text from your storage location
+//   text(value)		- writes the supplied template text to your storage location
+//   data(key)			- reads values stored using data(key, value) - see below
+//   data(key, value)	- associates "value" with this template and the key "key". Is used to store information like "isRewritten".
+//
+// Optionally, template sources can also have the following functions:
+//   nodes()            - returns a DOM element containing the nodes of this template, where available
+//   nodes(value)       - writes the given DOM element to your storage location
+// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()
+// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().
+//
+// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were
+// using and overriding "makeTemplateSource" to return an instance of your custom template source.
+// ---- ko.templateSources.domElement -----
+// template types
+var templateScript = 1;
+var templateTextArea = 2;
+var templateTemplate = 3;
+var templateElement = 4;
+function domElement(element) {
+    this.domElement = element;
+    if (!element) {
+        return;
+    }
+    var tagNameLower$$1 = tagNameLower(element);
+    this.templateType =
+        tagNameLower$$1 === "script" ? templateScript :
+            tagNameLower$$1 === "textarea" ? templateTextArea :
+                // For browsers with proper <template> element support, where the .content property gives a document fragment
+                tagNameLower$$1 == "template" && element.content && element.content.nodeType === 11 ? templateTemplate :
+                    templateElement;
+}
+domElement.prototype.text = function () {
+    var elemContentsProperty = this.templateType === templateScript ? "text"
+        : this.templateType === templateTextArea ? "value"
+            : "innerHTML";
+    if (arguments.length == 0) {
+        return this.domElement[elemContentsProperty];
+    }
+    else {
+        var valueToWrite = arguments[0];
+        if (elemContentsProperty === "innerHTML")
+            setHtml(this.domElement, valueToWrite);
+        else
+            this.domElement[elemContentsProperty] = valueToWrite;
+    }
+};
+var dataDomDataPrefix = data.nextKey() + "_";
+domElement.prototype.data = function (key /*, valueToWrite */) {
+    if (arguments.length === 1) {
+        return data.get(this.domElement, dataDomDataPrefix + key);
+    }
+    else {
+        data.set(this.domElement, dataDomDataPrefix + key, arguments[1]);
+    }
+};
+var templatesDomDataKey = data.nextKey();
+function getTemplateDomData(element) {
+    return data.get(element, templatesDomDataKey) || {};
+}
+function setTemplateDomData(element, data$$1) {
+    data.set(element, templatesDomDataKey, data$$1);
+}
+domElement.prototype.nodes = function () {
+    var element = this.domElement;
+    if (arguments.length == 0) {
+        var templateData = getTemplateDomData(element), containerData = templateData.containerData;
+        return containerData || (this.templateType === templateTemplate ? element.content :
+            this.templateType === templateElement ? element :
+                undefined);
+    }
+    else {
+        var valueToWrite = arguments[0];
+        setTemplateDomData(element, { containerData: valueToWrite });
+    }
+};
+// ---- ko.templateSources.anonymousTemplate -----
+// Anonymous templates are normally saved/retrieved as DOM nodes through "nodes".
+// For compatibility, you can also read "text"; it will be serialized from the nodes on demand.
+// Writing to "text" is still supported, but then the template data will not be available as DOM nodes.
+function anonymousTemplate(element) {
+    this.domElement = element;
+}
+anonymousTemplate.prototype = new domElement();
+anonymousTemplate.prototype.constructor = anonymousTemplate;
+anonymousTemplate.prototype.text = function () {
+    if (arguments.length == 0) {
+        var templateData = getTemplateDomData(this.domElement);
+        if (templateData.textData === undefined && templateData.containerData)
+            templateData.textData = templateData.containerData.innerHTML;
+        return templateData.textData;
+    }
+    else {
+        var valueToWrite = arguments[0];
+        setTemplateDomData(this.domElement, { textData: valueToWrite });
+    }
+};
+
+// If you want to make a custom template engine,
+//
+// [1] Inherit from this class (like ko.nativeTemplateEngine does)
+// [2] Override 'renderTemplateSource', supplying a function with this signature:
+//
+//        function (templateSource, bindingContext, options) {
+//            // - templateSource.text() is the text of the template you should render
+//            // - bindingContext.$data is the data you should pass into the template
+//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,
+//            //     and bindingContext.$root available in the template too
+//            // - options gives you access to any other properties set on "data-bind: { template: options }"
+//            // - templateDocument is the document object of the template
+//            //
+//            // Return value: an array of DOM nodes
+//        }
+//
+// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:
+//
+//        function (script) {
+//            // Return value: Whatever syntax means "Evaluate the JavaScript statement 'script' and output the result"
+//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'
+//        }
+//
+//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.
+//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)
+//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.
+function templateEngine() { }
+
+extend(templateEngine.prototype, {
+    renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {
+        options$$1.onError("Override renderTemplateSource");
+    },
+    createJavaScriptEvaluatorBlock: function (script) {
+        options.onError("Override createJavaScriptEvaluatorBlock");
+    },
+    makeTemplateSource: function (template, templateDocument) {
+        // Named template
+        if (typeof template == "string") {
+            templateDocument = templateDocument || document;
+            var elem = templateDocument.getElementById(template);
+            if (!elem)
+                options.onError("Cannot find template with ID " + template);
+            return new domElement(elem);
+        }
+        else if ((template.nodeType == 1) || (template.nodeType == 8)) {
+            // Anonymous template
+            return new anonymousTemplate(template);
+        }
+        else
+            options.onError("Unknown template type: " + template);
+    },
+    renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {
+        var templateSource = this['makeTemplateSource'](template, templateDocument);
+        return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);
+    }
+});
+
+var _templateEngine;
+function setTemplateEngine(tEngine) {
+    if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {
+        // TODO: ko.templateEngine to appropriate name
+        throw new Error('templateEngine must inherit from ko.templateEngine');
+    }
+    _templateEngine = tEngine;
+}
+function invokeForEachNodeInContinuousRange(firstNode, lastNode, action) {
+    var node;
+    var nextInQueue = firstNode;
+    var firstOutOfRangeNode = virtualElements.nextSibling(lastNode);
+    while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {
+        nextInQueue = virtualElements.nextSibling(node);
+        action(node, nextInQueue);
+    }
+}
+function activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext$$1, afterBindingCallback) {
+    // To be used on any nodes that have been rendered by a template and have been inserted into some parent element
+    // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because
+    // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,
+    // (1) Does a regular "applyBindings" to associate bindingContext with this node and to activate any non-memoized bindings
+    // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)
+    if (continuousNodeArray.length) {
+        var firstNode = continuousNodeArray[0];
+        var lastNode = continuousNodeArray[continuousNodeArray.length - 1];
+        var parentNode = firstNode.parentNode;
+        var provider = options.bindingProviderInstance;
+        var preprocessNode = provider.preprocessNode;
+        if (preprocessNode) {
+            invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {
+                var nodePreviousSibling = node.previousSibling;
+                var newNodes = preprocessNode.call(provider, node);
+                if (newNodes) {
+                    if (node === firstNode) {
+                        firstNode = newNodes[0] || nextNodeInRange;
+                    }
+                    if (node === lastNode) {
+                        lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling;
+                    }
+                }
+            });
+            // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.
+            // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real
+            // first node needs to be in the array).
+            continuousNodeArray.length = 0;
+            if (!firstNode) {
+                return;
+            }
+            if (firstNode === lastNode) {
+                continuousNodeArray.push(firstNode);
+            }
+            else {
+                continuousNodeArray.push(firstNode, lastNode);
+                fixUpContinuousNodeArray(continuousNodeArray, parentNode);
+            }
+        }
+        // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)
+        // whereas a regular applyBindings won't introduce new memoized nodes
+        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {
+            if (node.nodeType === 1 || node.nodeType === 8) {
+                applyBindings(bindingContext$$1, node).then(afterBindingCallback);
+            }
+        });
+        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {
+            if (node.nodeType === 1 || node.nodeType === 8) {
+                memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]);
+            }
+        });
+        // Make sure any changes done by applyBindings or unmemoize are reflected in the array
+        fixUpContinuousNodeArray(continuousNodeArray, parentNode);
+    }
+}
+function getFirstNodeFromPossibleArray(nodeOrNodeArray) {
+    return nodeOrNodeArray.nodeType ? nodeOrNodeArray
+        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]
+            : null;
+}
+function executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {
+    options$$1 = options$$1 || {};
+    var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+    var templateDocument = (firstTargetNode || template || {}).ownerDocument;
+    var templateEngineToUse = (options$$1.templateEngine || _templateEngine);
+    var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);
+    // Loosely check result is an array of DOM nodes
+    if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) {
+        throw new Error('Template engine must return an array of DOM nodes');
+    }
+    var haveAddedNodesToParent = false;
+    switch (renderMode) {
+        case 'replaceChildren':
+            virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);
+            haveAddedNodesToParent = true;
+            break;
+        case 'replaceNode':
+            replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);
+            haveAddedNodesToParent = true;
+            break;
+        case 'ignoreTargetNode': break;
+        default:
+            throw new Error('Unknown renderMode: ' + renderMode);
+    }
+    if (haveAddedNodesToParent) {
+        activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);
+        if (options$$1.afterRender) {
+            dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]);
+        }
+    }
+    return renderedNodesArray;
+}
+function resolveTemplateName(template, data$$1, context) {
+    // The template can be specified as:
+    if (isObservable(template)) {
+        // 1. An observable, with string value
+        return template();
+    }
+    else if (typeof template === 'function') {
+        // 2. A function of (data, context) returning a string
+        return template(data$$1, context);
+    }
+    else {
+        // 3. A string
+        return template;
+    }
+}
+function renderTemplate(template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {
+    options$$1 = options$$1 || {};
+    if ((options$$1.templateEngine || _templateEngine) === undefined) {
+        throw new Error('Set a template engine before calling renderTemplate');
+    }
+    renderMode = renderMode || 'replaceChildren';
+    if (targetNodeOrNodeArray) {
+        var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+        var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)
+        var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;
+        return computed(// So the DOM is automatically updated when any dependency changes
+        function () {
+            // Ensure we've got a proper binding context to work with
+            var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))
+                ? dataOrBindingContext
+                : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });
+            var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);
+            var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);
+            if (renderMode === 'replaceNode') {
+                targetNodeOrNodeArray = renderedNodesArray;
+                firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);
+            }
+        }, null, { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved });
+    }
+    else {
+        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node
+        return memoization.memoize(function (domNode) {
+            renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');
+        });
+    }
+}
+function renderTemplateForEach(template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {
+    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then
+    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.
+    var arrayItemContext;
+    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode
+    function executeTemplateForArrayItem(arrayValue, index) {
+        // Support selecting template as a function of the data being rendered
+        arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {
+            context['$index'] = index;
+        });
+        var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);
+        return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback);
+    }
+    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode
+    var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {
+        activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);
+        if (options$$1['afterRender']) {
+            options$$1['afterRender'](addedNodesArray, arrayValue);
+        }
+        // release the "cache" variable, so that it can be collected by
+        // the GC when its value isn't used from within the bindings anymore.
+        arrayItemContext = null;
+    };
+    return computed(function () {
+        var unwrappedArray = unwrap(arrayOrObservableArray) || [];
+        if (typeof unwrappedArray.length !== 'number') {
+            unwrappedArray = [unwrappedArray];
+        }
+        // Filter out any entries marked as destroyed
+        var filteredArray = arrayFilter(unwrappedArray, function (item) {
+            return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy']);
+        });
+        // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).
+        // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.
+        dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);
+    }, null, { disposeWhenNodeIsRemoved: targetNode });
+}
+var templateComputedDomDataKey = data.nextKey();
+var TemplateBindingHandler = /** @class */ (function (_super) {
+    __extends$7(TemplateBindingHandler, _super);
+    function TemplateBindingHandler(params) {
+        var _this = _super.call(this, params) || this;
+        var element = _this.$element;
+        var bindingValue = unwrap(_this.value);
+        var container;
+        // Expose 'conditional' for `else` chaining.
+        data.set(element, 'conditional', {
+            elseChainSatisfied: observable(true)
+        });
+        // Support anonymous templates
+        if (typeof bindingValue === 'string' || bindingValue.name) {
+            // It's a named template - clear the element
+            virtualElements.emptyNode(element);
+        }
+        else if ('nodes' in bindingValue) {
+            // We've been given an array of DOM nodes. Save them as the template source.
+            // There is no known use case for the node array being an observable array (if the output
+            // varies, put that behavior *into* your template - that's what templates are for), and
+            // the implementation would be a mess, so assert that it's not observable.
+            var nodes = bindingValue.nodes || [];
+            if (isObservable(nodes)) {
+                throw new Error('The "nodes" option must be a plain, non-observable array.');
+            }
+            container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent
+            new anonymousTemplate(element)['nodes'](container);
+        }
+        else {
+            // It's an anonymous template - store the element contents, then clear the element
+            var templateNodes = virtualElements.childNodes(element);
+            container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent
+            new anonymousTemplate(element).nodes(container);
+        }
+        _this.computed(_this.onValueChange.bind(_this));
+        return _this;
+    }
+    TemplateBindingHandler.prototype.onValueChange = function () {
+        var element = this.$element;
+        var bindingContext$$1 = this.$context;
+        var value = this.value;
+        var options$$1 = unwrap(value);
+        var shouldDisplay = true;
+        var templateComputed = null;
+        var elseChainSatisfied = data.get(element, 'conditional').elseChainSatisfied;
+        var templateName;
+        if (typeof options$$1 === 'string') {
+            templateName = value;
+            options$$1 = {};
+        }
+        else {
+            templateName = options$$1.name;
+            // Support "if"/"ifnot" conditions
+            if ('if' in options$$1) {
+                shouldDisplay = unwrap(options$$1["if"]);
+            }
+            if (shouldDisplay && 'ifnot' in options$$1) {
+                shouldDisplay = !unwrap(options$$1.ifnot);
+            }
+        }
+        if ('foreach' in options$$1) {
+            // Render once for each data point (treating data set as empty if shouldDisplay==false)
+            var dataArray = (shouldDisplay && options$$1.foreach) || [];
+            templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);
+            elseChainSatisfied((unwrap(dataArray) || []).length !== 0);
+        }
+        else if (shouldDisplay) {
+            // Render once for this single data point (or use the viewModel if no data was provided)
+            var innerBindingContext = ('data' in options$$1)
+                ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as) // Given an explitit 'data' value, we create a child binding context for it
+                : bindingContext$$1; // Given no explicit 'data' value, we retain the same binding context
+            templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);
+            elseChainSatisfied(true);
+        }
+        else {
+            virtualElements.emptyNode(element);
+            elseChainSatisfied(false);
+        }
+        // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)
+        this.disposeOldComputedAndStoreNewOne(element, templateComputed);
+    };
+    TemplateBindingHandler.prototype.disposeOldComputedAndStoreNewOne = function (element, newComputed) {
+        var oldComputed = data.get(element, templateComputedDomDataKey);
+        if (oldComputed && (typeof oldComputed.dispose === 'function')) {
+            oldComputed.dispose();
+        }
+        data.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);
+    };
+    Object.defineProperty(TemplateBindingHandler.prototype, "controlsDescendants", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(TemplateBindingHandler, "allowVirtualElements", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return TemplateBindingHandler;
+}(AsyncBindingHandler));
+
+function nativeTemplateEngine() {
+}
+nativeTemplateEngine.prototype = new templateEngine();
+nativeTemplateEngine.prototype.constructor = nativeTemplateEngine;
+nativeTemplateEngine.prototype.renderTemplateSource = function (templateSource, bindingContext$$1, options$$1, templateDocument) {
+    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly
+    templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null, templateNodes = templateNodesFunc ? templateSource.nodes() : null;
+    if (templateNodes) {
+        return makeArray(templateNodes.cloneNode(true).childNodes);
+    }
+    else {
+        var templateText = templateSource.text();
+        return parseHtmlFragment(templateText, templateDocument);
+    }
+};
+nativeTemplateEngine.instance = new nativeTemplateEngine();
+setTemplateEngine(nativeTemplateEngine.instance);
+
+// "foreach: someExpression" is equivalent to "template: { foreach: someExpression }"
+// "foreach: { data: someExpression, afterAdd: myfn }" is equivalent to "template: { foreach: someExpression, afterAdd: myfn }"
+var TemplateForEachBindingHandler = /** @class */ (function (_super) {
+    __extends$7(TemplateForEachBindingHandler, _super);
+    function TemplateForEachBindingHandler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(TemplateForEachBindingHandler.prototype, "value", {
+        get: function () {
+            var modelValue = this.valueAccessor();
+            var unwrappedValue = peek(modelValue); // Unwrap without setting a dependency here
+            // If unwrappedValue is the array, pass in the wrapped value on its own
+            // The value will be unwrapped and tracked within the template binding
+            // (See https://github.com/SteveSanderson/knockout/issues/523)
+            if (!unwrappedValue || typeof unwrappedValue.length === 'number') {
+                return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance };
+            }
+            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates
+            unwrap(modelValue);
+            return {
+                foreach: unwrappedValue.data,
+                as: unwrappedValue.as,
+                includeDestroyed: unwrappedValue.includeDestroyed,
+                afterAdd: unwrappedValue.afterAdd,
+                beforeRemove: unwrappedValue.beforeRemove,
+                afterRender: unwrappedValue.afterRender,
+                beforeMove: unwrappedValue.beforeMove,
+                afterMove: unwrappedValue.afterMove,
+                templateEngine: nativeTemplateEngine.instance
+            };
+        },
+        enumerable: true,
+        configurable: true
+    });
+    return TemplateForEachBindingHandler;
+}(TemplateBindingHandler));
+
+//    'let': letBinding,
+//    template: template,
+var bindings$1 = {
+    foreach: TemplateForEachBindingHandler,
+    template: TemplateBindingHandler
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$10 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$8(d, b) {
+    extendStatics$10(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+/**
+ * Test a node for whether it represents an "else" condition.
+ * @param  {HTMLElement}  node to be tested
+ * @return {Boolean}      true when
+ *
+ * Matches <!-- else -->
+ */
+function isElseNode(node) {
+    return node.nodeType === 8 &&
+        node.nodeValue.trim().toLowerCase() === 'else';
+}
+function detectElse(element) {
+    var children = virtualElements.childNodes(element);
+    for (var i = 0, j = children.length; i < j; ++i) {
+        if (isElseNode(children[i])) {
+            return true;
+        }
+    }
+    return false;
+}
+/**
+ * Clone the nodes, returning `ifNodes`, `elseNodes`
+ * @param  {HTMLElement} element The nodes to be cloned
+ * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.
+ * @return {object}         Containing the cloned nodes.
+ */
+function cloneIfElseNodes(element, hasElse) {
+    var children = virtualElements.childNodes(element);
+    var ifNodes = [];
+    var elseNodes = [];
+    var target = ifNodes;
+    for (var i = 0, j = children.length; i < j; ++i) {
+        if (hasElse && isElseNode(children[i])) {
+            target = elseNodes;
+            hasElse = false;
+        }
+        else {
+            target.push(cleanNode(children[i].cloneNode(true)));
+        }
+    }
+    return { ifNodes: ifNodes, elseNodes: elseNodes };
+}
+/**
+ * Create a DOMbinding that controls DOM nodes presence
+ *
+ * Covers e.g.
+ *
+ * 1. DOM Nodes contents
+ *
+ * <div data-bind='if: x'>
+ * <!-- else --> ... an optional "if"
+ * </div>
+ *
+ * 2. Virtual elements
+ *
+ * <!-- ko if: x -->
+ * <!-- else -->
+ * <!-- /ko -->
+ *
+ * 3. Else binding
+ * <div data-bind='if: x'></div>
+ * <div data-bind='else'></div>
+ */
+var ConditionalBindingHandler = /** @class */ (function (_super) {
+    __extends$8(ConditionalBindingHandler, _super);
+    function ConditionalBindingHandler(params) {
+        var _this = _super.call(this, params) || this;
+        _this.hasElse = detectElse(_this.$element);
+        var elseChainSatisfied = _this.completesElseChain = observable();
+        data.set(_this.$element, 'conditional', { elseChainSatisfied: elseChainSatisfied });
+        _this.computed(_this.render.bind(_this));
+        return _this;
+    }
+    Object.defineProperty(ConditionalBindingHandler.prototype, "elseChainIsAlreadySatisfied", {
+        get: function () { return false; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ConditionalBindingHandler.prototype, "needsRefresh", {
+        get: function () {
+            return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ConditionalBindingHandler.prototype, "shouldDisplayIf", {
+        get: function () { return !!unwrap(this.value); },
+        enumerable: true,
+        configurable: true
+    });
+    ConditionalBindingHandler.prototype.getIfElseNodes = function () {
+        if (this.ifElseNodes) {
+            return this.ifElseNodes;
+        }
+        if (dependencyDetection.getDependenciesCount() || this.hasElse) {
+            return cloneIfElseNodes(this.$element, this.hasElse);
+        }
+    };
+    ConditionalBindingHandler.prototype.render = function () {
+        // Create any dependencies on values created in value-functions.
+        if (typeof this.value === 'function') {
+            this.value();
+        }
+        var isFirstRender = !this.ifElseNodes;
+        var shouldDisplayIf = this.shouldDisplayIf;
+        var needsRefresh = this.needsRefresh;
+        if (this.elseChainIsAlreadySatisfied) {
+            shouldDisplayIf = false;
+            needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;
+            this.completesElseChain(true);
+        }
+        else {
+            this.completesElseChain(this.shouldDisplayIf);
+        }
+        if (!needsRefresh) {
+            return;
+        }
+        this.ifElseNodes = this.getIfElseNodes();
+        if (shouldDisplayIf) {
+            if (!isFirstRender || this.hasElse) {
+                virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));
+            }
+        }
+        else if (this.ifElseNodes) {
+            virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));
+        }
+        else {
+            virtualElements.emptyNode(this.$element);
+        }
+        applyBindingsToDescendants(this.bindingContext, this.$element)
+            .then(this.completeBinding);
+        this.didDisplayOnLastUpdate = shouldDisplayIf;
+    };
+    Object.defineProperty(ConditionalBindingHandler.prototype, "bindingContext", {
+        get: function () { return this.$context; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ConditionalBindingHandler.prototype, "controlsDescendants", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ConditionalBindingHandler, "allowVirtualElements", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return ConditionalBindingHandler;
+}(AsyncBindingHandler));
+var IfBindingHandler = /** @class */ (function (_super) {
+    __extends$8(IfBindingHandler, _super);
+    function IfBindingHandler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    return IfBindingHandler;
+}(ConditionalBindingHandler));
+var UnlessBindingHandler = /** @class */ (function (_super) {
+    __extends$8(UnlessBindingHandler, _super);
+    function UnlessBindingHandler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(UnlessBindingHandler.prototype, "shouldDisplayIf", {
+        get: function () { return !_super.prototype.shouldDisplayIf; },
+        enumerable: true,
+        configurable: true
+    });
+    return UnlessBindingHandler;
+}(ConditionalBindingHandler));
+var ElseBindingHandler = /** @class */ (function (_super) {
+    __extends$8(ElseBindingHandler, _super);
+    function ElseBindingHandler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(ElseBindingHandler.prototype, "shouldDisplayIf", {
+        get: function () { return _super.prototype.shouldDisplayIf || this.value === undefined; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ElseBindingHandler.prototype, "elseChainIsAlreadySatisfied", {
+        /**
+         * Return any conditional that precedes the given node.
+         * @return {object}      { elseChainSatisfied: observable }
+         */
+        get: function () {
+            if (!this._elseChain) {
+                this._elseChain = this.readElseChain();
+            }
+            return unwrap(this._elseChain.elseChainSatisfied);
+        },
+        enumerable: true,
+        configurable: true
+    });
+    ElseBindingHandler.prototype.readElseChain = function () {
+        var node = this.$element;
+        do {
+            node = node.previousSibling;
+        } while (node && node.nodeType !== 1 && node.nodeType !== 8);
+        if (!node) {
+            return false;
+        }
+        if (node.nodeType === 8) {
+            node = virtualElements.previousSibling(node);
+        }
+        return data.get(node, 'conditional') || {};
+    };
+    return ElseBindingHandler;
+}(ConditionalBindingHandler));
+var WithBindingHandler = /** @class */ (function (_super) {
+    __extends$8(WithBindingHandler, _super);
+    function WithBindingHandler() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Object.defineProperty(WithBindingHandler.prototype, "needsRefresh", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(WithBindingHandler.prototype, "bindingContext", {
+        get: function () {
+            return this.$context.createStaticChildContext(this.value);
+        },
+        enumerable: true,
+        configurable: true
+    });
+    return WithBindingHandler;
+}(ConditionalBindingHandler));
+
+var bindings$2 = {
+    'if': IfBindingHandler,
+    'with': WithBindingHandler,
+    ifnot: UnlessBindingHandler,
+    unless: UnlessBindingHandler,
+    'else': ElseBindingHandler,
+    'elseif': ElseBindingHandler
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$11 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$9(d, b) {
+    extendStatics$11(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+// index.js
+// --------
+// Fast For Each
+//
+// Employing sound techniques to make a faster Knockout foreach binding.
+// --------
+//      Utilities
+var MAX_LIST_SIZE = 9007199254740991;
+// from https://github.com/jonschlinkert/is-plain-object
+function isPlainObject(o) {
+    return !!o && typeof o === 'object' && o.constructor === Object;
+}
+var supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';
+// Get a copy of the (possibly virtual) child nodes of the given element,
+// put them into a container, then empty the given node.
+function makeTemplateNode(sourceNode) {
+    var container = document.createElement('div');
+    var parentNode;
+    if (sourceNode.content) {
+        // For e.g. <template> tags
+        parentNode = sourceNode.content;
+    }
+    else if (sourceNode.tagName === 'SCRIPT') {
+        parentNode = document.createElement('div');
+        parentNode.innerHTML = sourceNode.text;
+    }
+    else {
+        // Anything else e.g. <div>
+        parentNode = sourceNode;
+    }
+    arrayForEach(virtualElements.childNodes(parentNode), function (child) {
+        // FIXME - This cloneNode could be expensive; we may prefer to iterate over the
+        // parentNode children in reverse (so as not to foul the indexes as childNodes are
+        // removed from parentNode when inserted into the container)
+        if (child) {
+            container.insertBefore(child.cloneNode(true), null);
+        }
+    });
+    return container;
+}
+// Mimic a KO change item 'add'
+function valueToChangeAddItem(value, index) {
+    return {
+        status: 'added',
+        value: value,
+        index: index
+    };
+}
+// store a symbol for caching the pending delete info index in the data item objects
+var PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');
+// Extend the given context with a $index (passed in via the createChildContext)
+function extend$context(include$index, $context) {
+    if (include$index) {
+        $context.$index = observable();
+    }
+    $context.$list = this.data;
+}
+var ForEachBinding = /** @class */ (function (_super) {
+    __extends$9(ForEachBinding, _super);
+    // NOTE: valid valueAccessors include:
+    //    []
+    //    observable([])
+    //    observableArray([])
+    //    computed
+    //    {data: array, name: string, as: string}
+    function ForEachBinding(params) {
+        var _this = _super.call(this, params) || this;
+        var settings = {};
+        if (isPlainObject(_this.value)) {
+            Object.assign(settings, _this.value);
+        }
+        _this.noIndex = settings.noIndex || _this.allBindings.get('noIndex');
+        _this.as = settings.as || _this.allBindings.get('as');
+        _this.data = settings.data || (unwrap(_this.$context.$rawData) === _this.value ? _this.$context.$rawData : _this.value);
+        _this.container = virtualElements.isStartComment(_this.$element)
+            ? _this.$element.parentNode : _this.$element;
+        _this.generateContext = _this.createContextGenerator(_this.as, !_this.noIndex);
+        if (_this.noIndex) {
+            _this.updateIndexes = false;
+        }
+        _this.templateNode = makeTemplateNode(settings.templateNode || (settings.name
+            ? document.getElementById(settings.name).cloneNode(true)
+            : _this.$element));
+        ['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']
+            .forEach(function (p) { _this[p] = settings[p] || _this.allBindings.get(p); });
+        _this.changeQueue = [];
+        _this.firstLastNodesList = [];
+        _this.indexesToDelete = [];
+        _this.rendering_queued = false;
+        _this.pendingDeletes = [];
+        // Expose the conditional so that if the `foreach` data is empty, successive
+        // 'else' bindings will appear.
+        _this.isNotEmpty = observable(Boolean(unwrap(_this.data).length));
+        data.set(_this.$element, 'conditional', {
+            elseChainSatisfied: _this.isNotEmpty
+        });
+        // Remove existing content.
+        virtualElements.emptyNode(_this.$element);
+        // Prime content
+        var primeData = unwrap(_this.data);
+        if (primeData.map) {
+            _this.onArrayChange(primeData.map(valueToChangeAddItem), true);
+        }
+        else {
+            _this.completeBinding();
+        }
+        // Watch for changes
+        if (isObservable(_this.data)) {
+            if (!_this.data.indexOf) {
+                // Make sure the observable is trackable.
+                _this.data = _this.data.extend({ trackArrayChanges: true });
+            }
+            _this.changeSubs = _this.data.subscribe(_this.onArrayChange, _this, 'arrayChange');
+        }
+        return _this;
+    }
+    ForEachBinding.prototype.dispose = function () {
+        if (this.changeSubs) {
+            this.changeSubs.dispose();
+        }
+        this.flushPendingDeletes();
+    };
+    // If the array changes we register the change.
+    ForEachBinding.prototype.onArrayChange = function (changeSet, isInitial) {
+        var _this = this;
+        var changeMap = {
+            added: [],
+            deleted: []
+        };
+        // knockout array change notification index handling:
+        // - sends the original array indexes for deletes
+        // - sends the new array indexes for adds
+        // - sorts them all by index in ascending order
+        // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked
+        for (var i = 0, len = changeSet.length; i < len; i++) {
+            if (changeMap.added.length && changeSet[i].status === 'added') {
+                var lastAdd = changeMap.added[changeMap.added.length - 1];
+                var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;
+                if (lastIndex + 1 === changeSet[i].index) {
+                    if (!lastAdd.isBatch) {
+                        // transform the last addition into a batch addition object
+                        lastAdd = {
+                            isBatch: true,
+                            status: 'added',
+                            index: lastAdd.index,
+                            values: [lastAdd.value]
+                        };
+                        changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);
+                    }
+                    lastAdd.values.push(changeSet[i].value);
+                    continue;
+                }
+            }
+            changeMap[changeSet[i].status].push(changeSet[i]);
+        }
+        if (changeMap.deleted.length > 0) {
+            this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);
+            this.changeQueue.push({ status: 'clearDeletedIndexes' });
+        }
+        this.changeQueue.push.apply(this.changeQueue, changeMap.added);
+        // Once a change is registered, the ticking count-down starts for the processQueue.
+        if (this.changeQueue.length > 0 && !this.rendering_queued) {
+            this.rendering_queued = true;
+            if (isInitial) {
+                this.processQueue();
+            }
+            else {
+                ForEachBinding.animateFrame.call(window, function () { return _this.processQueue(); });
+            }
+        }
+    };
+    ForEachBinding.prototype.startQueueFlush = function () {
+        // Callback so folks can do things before the queue flush.
+        if (typeof this.beforeQueueFlush === 'function') {
+            this.beforeQueueFlush(this.changeQueue);
+        }
+    };
+    ForEachBinding.prototype.endQueueFlush = function () {
+        // Callback so folks can do things.
+        if (typeof this.afterQueueFlush === 'function') {
+            this.afterQueueFlush(this.changeQueue);
+        }
+    };
+    // Reflect all the changes in the queue in the DOM, then wipe the queue.
+    ForEachBinding.prototype.processQueue = function () {
+        var _this = this;
+        var isEmpty = !unwrap(this.data).length;
+        var lowestIndexChanged = MAX_LIST_SIZE;
+        this.startQueueFlush();
+        arrayForEach(this.changeQueue, function (changeItem) {
+            if (typeof changeItem.index === 'number') {
+                lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);
+            }
+            _this[changeItem.status](changeItem);
+        });
+        this.flushPendingDeletes();
+        this.rendering_queued = false;
+        // Update our indexes.
+        if (this.updateIndexes) {
+            this.updateIndexes(lowestIndexChanged);
+        }
+        this.endQueueFlush();
+        this.changeQueue = [];
+        // Update the conditional exposed on the domData
+        if (isEmpty !== !this.isNotEmpty()) {
+            this.isNotEmpty(!isEmpty);
+        }
+    };
+    /**
+     * Return a function that generates the context for a given node.
+     *
+     * We generate a single function that reduces our inner-loop calculations,
+     * which has a good chance of being optimized by the browser.
+     *
+     * @param  {string} as  The name given to each item in the list
+     * @param  {bool} index Whether to calculate indexes
+     * @return {function}   A function(dataValue) that returns the context
+     */
+    ForEachBinding.prototype.createContextGenerator = function (as, index) {
+        var $context = this.$context;
+        switch ((as && 1) | (index && 2)) {
+            case 0:// no-as & no-index
+                return function (v) {
+                    return $context.createChildContext(v, null, extend$context.bind(this, false));
+                };
+            case 1:// as + no-index
+                return function (v) {
+                    var obj = { $index: undefined, $list: this.data };
+                    obj[as] = v;
+                    return $context.extend(obj);
+                };
+            case 2:// no-as + index
+                return function (v) {
+                    return $context.createChildContext(v, null, extend$context.bind(this, true));
+                };
+            case 3:// as + index
+                return function (v) {
+                    var obj = { $index: observable(), $list: this.data };
+                    obj[as] = v;
+                    return $context.extend(obj);
+                };
+        }
+    };
+    // Process a changeItem with {status: 'added', ...}
+    ForEachBinding.prototype.added = function (changeItem) {
+        var index = changeItem.index;
+        var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];
+        var referenceElement = this.getLastNodeBeforeIndex(index);
+        // gather all childnodes for a possible batch insertion
+        var allChildNodes = [];
+        var asyncBindingResults = [];
+        var children;
+        for (var i = 0, len = valuesToAdd.length; i < len; ++i) {
+            // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset
+            var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);
+            if (pendingDelete && pendingDelete.nodesets.length) {
+                children = pendingDelete.nodesets.pop();
+            }
+            else {
+                var templateClone = this.templateNode.cloneNode(true);
+                // Apply bindings first, and then process child nodes,
+                // because bindings can add childnodes.
+                var bindingResult = applyBindingsToDescendants(this.generateContext(valuesToAdd[i]), templateClone);
+                asyncBindingResults.push(bindingResult);
+                children = virtualElements.childNodes(templateClone);
+            }
+            // Note discussion at https://github.com/angular/angular.js/issues/7851
+            allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));
+            this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });
+        }
+        if (typeof this.afterAdd === 'function') {
+            this.afterAdd({
+                nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),
+                foreachInstance: this
+            });
+        }
+        else {
+            this.insertAllAfter(allChildNodes, referenceElement);
+        }
+        this.completeBinding(options.Promise.all(asyncBindingResults));
+    };
+    ForEachBinding.prototype.getNodesForIndex = function (index) {
+        var result = [];
+        var ptr = this.firstLastNodesList[index].first;
+        var last = this.firstLastNodesList[index].last;
+        result.push(ptr);
+        while (ptr && ptr !== last) {
+            ptr = ptr.nextSibling;
+            result.push(ptr);
+        }
+        return result;
+    };
+    ForEachBinding.prototype.getLastNodeBeforeIndex = function (index) {
+        if (index < 1 || index - 1 >= this.firstLastNodesList.length) {
+            return null;
+        }
+        return this.firstLastNodesList[index - 1].last;
+    };
+    /**
+     * Get the active (focused) node, if it's a child of the given node.
+     */
+    ForEachBinding.prototype.activeChildElement = function (node) {
+        var active = document.activeElement;
+        if (domNodeIsContainedBy(active, node)) {
+            return active;
+        }
+    };
+    ForEachBinding.prototype.insertAllAfter = function (nodeOrNodeArrayToInsert, insertAfterNode) {
+        var frag;
+        var len;
+        var i;
+        var active = null;
+        var containerNode = this.$element;
+        // Poor man's node and array check.
+        if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {
+            throw new Error('Expected a single node or a node array');
+        }
+        if (nodeOrNodeArrayToInsert.nodeType !== undefined) {
+            active = this.activeChildElement(nodeOrNodeArrayToInsert);
+            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);
+            return [nodeOrNodeArrayToInsert];
+        }
+        else if (nodeOrNodeArrayToInsert.length === 1) {
+            active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);
+            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);
+        }
+        else if (supportsDocumentFragment) {
+            frag = document.createDocumentFragment();
+            for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {
+                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);
+                frag.appendChild(nodeOrNodeArrayToInsert[i]);
+            }
+            virtualElements.insertAfter(containerNode, frag, insertAfterNode);
+        }
+        else {
+            // Nodes are inserted in reverse order - pushed down immediately after
+            // the last node for the previous item or as the first node of element.
+            for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {
+                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);
+                var child = nodeOrNodeArrayToInsert[i];
+                if (!child) {
+                    break;
+                }
+                virtualElements.insertAfter(containerNode, child, insertAfterNode);
+            }
+        }
+        if (active) {
+            active.focus();
+        }
+        return nodeOrNodeArrayToInsert;
+    };
+    // checks if the deleted data item should be handled with delay for a possible reuse at additions
+    ForEachBinding.prototype.shouldDelayDeletion = function (data$$1) {
+        return data$$1 && (typeof data$$1 === 'object' || typeof data$$1 === 'function');
+    };
+    // gets the pending deletion info for this data item
+    ForEachBinding.prototype.getPendingDeleteFor = function (data$$1) {
+        var index = data$$1 && data$$1[PENDING_DELETE_INDEX_SYM];
+        if (index === undefined)
+            return null;
+        return this.pendingDeletes[index];
+    };
+    // tries to find the existing pending delete info for this data item, and if it can't, it registeres one
+    ForEachBinding.prototype.getOrCreatePendingDeleteFor = function (data$$1) {
+        var pd = this.getPendingDeleteFor(data$$1);
+        if (pd) {
+            return pd;
+        }
+        pd = {
+            data: data$$1,
+            nodesets: []
+        };
+        data$$1[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;
+        this.pendingDeletes.push(pd);
+        return pd;
+    };
+    // Process a changeItem with {status: 'deleted', ...}
+    ForEachBinding.prototype.deleted = function (changeItem) {
+        // if we should delay the deletion of this data, we add the nodeset to the pending delete info object
+        if (this.shouldDelayDeletion(changeItem.value)) {
+            var pd = this.getOrCreatePendingDeleteFor(changeItem.value);
+            pd.nodesets.push(this.getNodesForIndex(changeItem.index));
+        }
+        else {
+            this.removeNodes(this.getNodesForIndex(changeItem.index));
+        }
+        this.indexesToDelete.push(changeItem.index);
+    };
+    // removes a set of nodes from the DOM
+    ForEachBinding.prototype.removeNodes = function (nodes) {
+        if (!nodes.length) {
+            return;
+        }
+        function removeFn() {
+            var parent = nodes[0].parentNode;
+            for (var i = nodes.length - 1; i >= 0; --i) {
+                cleanNode(nodes[i]);
+                parent.removeChild(nodes[i]);
+            }
+        }
+        if (this.beforeRemove) {
+            var beforeRemoveReturn = this.beforeRemove({
+                nodesToRemove: nodes, foreachInstance: this
+            }) || {};
+            // If beforeRemove returns a `then`–able e.g. a Promise, we remove
+            // the nodes when that thenable completes.  We pass any errors to
+            // ko.onError.
+            if (typeof beforeRemoveReturn.then === 'function') {
+                beforeRemoveReturn.then(removeFn, options.onError);
+            }
+        }
+        else {
+            removeFn();
+        }
+    };
+    // flushes the pending delete info store
+    // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up
+    // we also call it on dispose not to leave any mess
+    ForEachBinding.prototype.flushPendingDeletes = function () {
+        for (var i = 0, len = this.pendingDeletes.length; i !== len; ++i) {
+            var pd = this.pendingDeletes[i];
+            while (pd.nodesets.length) {
+                this.removeNodes(pd.nodesets.pop());
+            }
+            if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) {
+                delete pd.data[PENDING_DELETE_INDEX_SYM];
+            }
+        }
+        this.pendingDeletes = [];
+    };
+    // We batch our deletion of item indexes in our parallel array.
+    // See brianmhunt/knockout-fast-foreach#6/#8
+    ForEachBinding.prototype.clearDeletedIndexes = function () {
+        // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine
+        // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.
+        for (var i = this.indexesToDelete.length - 1; i >= 0; --i) {
+            this.firstLastNodesList.splice(this.indexesToDelete[i], 1);
+        }
+        this.indexesToDelete = [];
+    };
+    ForEachBinding.prototype.updateIndexes = function (fromIndex) {
+        var ctx;
+        for (var i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {
+            ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);
+            if (ctx) {
+                ctx.$index(i);
+            }
+        }
+    };
+    ForEachBinding.prototype.getContextStartingFrom = function (node) {
+        var ctx;
+        while (node) {
+            ctx = contextFor(node);
+            if (ctx) {
+                return ctx;
+            }
+            node = node.nextSibling;
+        }
+    };
+    /**
+     * Set whether the binding is always synchronous.
+     * Useful during testing.
+     */
+    ForEachBinding.setSync = function (toggle) {
+        var w = options.global;
+        if (toggle) {
+            ForEachBinding.animateFrame = function (frame) { frame(); };
+        }
+        else {
+            ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||
+                w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||
+                function (cb) { return w.setTimeout(cb, 1000 / 60); };
+        }
+    };
+    Object.defineProperty(ForEachBinding.prototype, "controlsDescendants", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ForEachBinding, "allowVirtualElements", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ForEachBinding, "ForEach", {
+        /* TODO: Remove; for legacy/testing */
+        get: function () { return this; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ForEachBinding, "PENDING_DELETE_INDEX_SYM", {
+        get: function () { return PENDING_DELETE_INDEX_SYM; },
+        enumerable: true,
+        configurable: true
+    });
+    return ForEachBinding;
+}(AsyncBindingHandler));
+
+var bindings$3 = {
+    foreach: ForEachBinding
+};
+// By default, foreach will be async.
+ForEachBinding.setSync(false);
+
+var sproto = String.prototype;
+var filters = {};
+// Convert value to uppercase
+filters.uppercase = function (value) {
+    return sproto.toUpperCase.call(unwrap(value));
+};
+// Convert value to lowercase
+filters.lowercase = function (value) {
+    return sproto.toLowerCase.call(unwrap(value));
+};
+// Return default value if the input value is empty or null
+filters['default'] = function (value, defaultValue) {
+    value = unwrap(value);
+    if (typeof value === "function") {
+        return value;
+    }
+    if (typeof value === "string") {
+        return sproto.trim.call(value) === '' ? defaultValue : value;
+    }
+    return value == null || value.length == 0 ? defaultValue : value;
+};
+// Return the value with the search string replaced with the replacement string
+filters.replace = function (value, search, replace) {
+    return sproto.replace.call(unwrap(value), search, replace);
+};
+filters.fit = function (value, length, replacement, trimWhere) {
+    value = unwrap(value);
+    if (length && ('' + value).length > length) {
+        replacement = '' + (replacement || '...');
+        length = length - replacement.length;
+        value = '' + value;
+        switch (trimWhere) {
+            case 'left':
+                return replacement + value.slice(-length);
+            case 'middle':
+                var leftLen = Math.ceil(length / 2);
+                return value.substr(0, leftLen) + replacement + value.slice(leftLen - length);
+            default:
+                return value.substr(0, length) + replacement;
+        }
+    }
+    else {
+        return value;
+    }
+};
+// Convert a model object to JSON
+filters.json = function (rootObject, space, replacer) {
+    // replacer and space are optional
+    return JSON.stringify(toJS(rootObject), replacer, space);
+};
+// Format a number using the browser's toLocaleString
+filters.number = function (value) {
+    return (+unwrap(value)).toLocaleString();
+};
+
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+/* global Reflect, Promise */
+
+var extendStatics$12 = Object.setPrototypeOf ||
+    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
+
+function __extends$10(d, b) {
+    extendStatics$12(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+//
+// Binding Handler for Components
+//
+var componentLoadingOperationUniqueId = 0;
+var ComponentBinding = /** @class */ (function (_super) {
+    __extends$10(ComponentBinding, _super);
+    function ComponentBinding(params) {
+        var _this = _super.call(this, params) || this;
+        _this.originalChildNodes = makeArray(virtualElements.childNodes(_this.$element));
+        _this.computed('computeApplyComponent');
+        return _this;
+    }
+    ComponentBinding.prototype.cloneTemplateIntoElement = function (componentName, componentDefinition, element) {
+        var template = componentDefinition['template'];
+        if (!template) {
+            throw new Error('Component \'' + componentName + '\' has no template');
+        }
+        var clonedNodesArray = cloneNodes(template);
+        virtualElements.setDomNodeChildren(element, clonedNodesArray);
+    };
+    ComponentBinding.prototype.createViewModel = function (componentDefinition, element, originalChildNodes, componentParams) {
+        var componentViewModelFactory = componentDefinition.createViewModel;
+        return componentViewModelFactory
+            ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })
+            : componentParams; // Template-only component
+    };
+    ComponentBinding.prototype.computeApplyComponent = function () {
+        var _this = this;
+        var value = unwrap(this.value);
+        var componentName;
+        var componentParams;
+        if (typeof value === 'string') {
+            componentName = value;
+        }
+        else {
+            componentName = unwrap(value['name']);
+            componentParams = unwrap(value['params']);
+        }
+        this.latestComponentName = componentName;
+        if (!componentName) {
+            throw new Error('No component name specified');
+        }
+        this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;
+        index$1.get(componentName, function (defn) { return _this.applyComponentDefinition(componentName, componentParams, defn); });
+    };
+    ComponentBinding.prototype.applyComponentDefinition = function (componentName, componentParams, componentDefinition) {
+        var _this = this;
+        // If this is not the current load operation for this element, ignore it.
+        if (this.currentLoadingOperationId !== this.loadingOperationId ||
+            this.latestComponentName !== componentName) {
+            return;
+        }
+        // Clean up previous state
+        this.cleanUpState();
+        var element = this.$element;
+        // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.
+        if (!componentDefinition) {
+            throw new Error('Unknown component \'' + componentName + '\'');
+        }
+        this.cloneTemplateIntoElement(componentName, componentDefinition, element);
+        var componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);
+        if (componentViewModel instanceof LifeCycle) {
+            componentViewModel.anchorTo(this.$element);
+        }
+        var ctxExtender = function (ctx) { return Object.assign(ctx, {
+            $component: componentViewModel,
+            $componentTemplateNodes: _this.originalChildNodes
+        }); };
+        var childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);
+        this.currentViewModel = componentViewModel;
+        applyBindingsToDescendants(childBindingContext, this.$element)
+            .then(this.completeBinding);
+    };
+    ComponentBinding.prototype.cleanUpState = function () {
+        var currentView = this.currentViewModel;
+        var currentViewDispose = currentView && currentView.dispose;
+        if (typeof currentViewDispose === 'function') {
+            currentViewDispose.call(currentView);
+        }
+        this.currentViewModel = null;
+        // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion
+        this.currentLoadingOperationId = null;
+    };
+    ComponentBinding.prototype.dispose = function () {
+        this.cleanUpState();
+        _super.prototype.dispose.call(this);
+    };
+    Object.defineProperty(ComponentBinding.prototype, "controlsDescendants", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    Object.defineProperty(ComponentBinding, "allowVirtualElements", {
+        get: function () { return true; },
+        enumerable: true,
+        configurable: true
+    });
+    return ComponentBinding;
+}(AsyncBindingHandler));
+
+var bindings$4 = { component: ComponentBinding };
+
+/* eslint semi: 0 */
+var coreUtils = {};
+arrayForEach([
+    'extend',
+    'setTimeout',
+    'arrayForEach',
+    'arrayFirst',
+    'arrayFilter',
+    'arrayGetDistinctValues',
+    'arrayIndexOf',
+    'arrayMap',
+    'arrayPushAll',
+    'arrayRemoveItem',
+    'getFormFields',
+    'peekObservable',
+    'postJson',
+    'parseJson',
+    'registerEventHandler',
+    'stringifyJson',
+    'range',
+    'toggleDomNodeCssClass',
+    'triggerEvent',
+    'unwrapObservable',
+    'objectForEach',
+    'addOrRemoveItem',
+    'setTextContent',
+    'domData',
+    'parseHtmlFragment',
+    'setHtml',
+    'compareArrays',
+    'setDomNodeChildrenFromArrayMapping'
+], function (coreUtil) {
+    coreUtils[coreUtil] = utils[coreUtil];
+});
+coreUtils.domNodeDisposal = {
+    addDisposeCallback: addDisposeCallback,
+    otherNodeCleanerFunctions: otherNodeCleanerFunctions,
+    removeDisposeCallback: removeDisposeCallback,
+    removeNode: removeNode
+};
+extend(coreUtils, {
+    setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,
+    unwrapObservable: unwrap,
+    peekObservable: peek
+});
+// Create the binding provider and default bindings.
+var provider = new MultiProvider({
+    globals: options.bindingGlobals,
+    providers: [
+        new AttributeMustacheProvider(),
+        new TextMustacheProvider(),
+        new ComponentProvider(),
+        new DataBindProvider(),
+        new VirtualProvider(),
+        new AttrProvider()
+    ]
+});
+options.bindingProviderInstance = provider;
+provider.bindingHandlers.set(bindings);
+provider.bindingHandlers.set(bindings$1);
+provider.bindingHandlers.set(bindings$2);
+provider.bindingHandlers.set(bindings$3);
+provider.bindingHandlers.set({ each: bindings$3.foreach });
+provider.bindingHandlers.set(bindings$4);
+Object.assign(options.filters, filters);
+// Expose the API.
+var index = {
+    // --- Top-level ---
+    version: '4.0.0-alpha4',
+    options: options,
+    extenders: extenders,
+    filters: options.filters,
+    Component: index$1.ComponentABC,
+    // --- Utilities ---
+    cleanNode: cleanNode,
+    memoization: memoization,
+    removeNode: removeNode,
+    tasks: tasks,
+    utils: coreUtils,
+    dependencyDetection: dependencyDetection,
+    ignoreDependencies: dependencyDetection.ignore,
+    // -- Observable ---
+    isObservable: isObservable,
+    isSubscribable: isSubscribable,
+    isWriteableObservable: isWriteableObservable,
+    isWritableObservable: isWriteableObservable,
+    observable: observable,
+    observableArray: observableArray,
+    peek: peek,
+    subscribable: subscribable,
+    unwrap: unwrap,
+    toJS: toJS,
+    toJSON: toJSON,
+    // ... Computed ...
+    computed: computed,
+    isComputed: isComputed,
+    isPureComputed: isPureComputed,
+    pureComputed: pureComputed,
+    // --- Templates ---
+    nativeTemplateEngine: nativeTemplateEngine,
+    renderTemplate: renderTemplate,
+    setTemplateEngine: setTemplateEngine,
+    templateEngine: templateEngine,
+    templateSources: { domElement: domElement, anonymousTemplate: anonymousTemplate },
+    // --- Binding ---
+    applyBindingAccessorsToNode: applyBindingAccessorsToNode,
+    applyBindings: applyBindings,
+    applyBindingsToDescendants: applyBindingsToDescendants,
+    applyBindingsToNode: applyBindingsToNode,
+    bindingHandlers: provider.bindingHandlers,
+    bindingProvider: provider,
+    contextFor: contextFor,
+    dataFor: dataFor,
+    getBindingHandler: getBindingHandler,
+    BindingHandler: BindingHandler,
+    AsyncBindingHandler: AsyncBindingHandler,
+    virtualElements: virtualElements,
+    domNodeDisposal: coreUtils.domNodeDisposal,
+    // --- Components ---
+    components: index$1
+};
+
+return index;
+
+})));
+//# sourceMappingURL=tko.js.map
diff --git a/packages/tko/dist/tko.js.map b/packages/tko/dist/tko.js.map
new file mode 100644
index 00000000..1feb822d
--- /dev/null
+++ b/packages/tko/dist/tko.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"tko.js","sources":["../../tko.utils/dist/tko.utils.js","../../tko.observable/dist/tko.observable.js","../../tko.computed/dist/tko.computed.js","../../tko.utils.parser/dist/tko.utils.parser.js","../../tko.provider/dist/tko.provider.js","../../tko.provider.bindingString/dist/tko.provider.bindingString.js","../../tko.provider.virtual/dist/tko.provider.virtual.js","../../tko.provider.databind/dist/tko.provider.databind.js","../../tko.lifecycle/dist/tko.lifecycle.js","../../tko.utils.component/dist/tko.utils.component.js","../../tko.provider.component/dist/tko.provider.component.js","../../tko.provider.attr/dist/tko.provider.attr.js","../../tko.provider.multi/dist/tko.provider.multi.js","../../tko.provider.mustache/dist/tko.provider.mustache.js","../../tko.bind/dist/tko.bind.js","../../tko.binding.core/dist/tko.binding.core.js","../../tko.binding.template/dist/tko.binding.template.js","../../tko.binding.if/dist/tko.binding.if.js","../../tko.binding.foreach/dist/tko.binding.foreach.js","../../tko.filter.punches/dist/tko.filter.punches.js","../../tko.binding.component/dist/tko.binding.component.js","../src/index.js"],"sourcesContent":["//\n// Array utilities\n//\n/* eslint no-cond-assign: 0 */\nfunction arrayForEach(array, action) {\n    for (var i = 0, j = array.length; i < j; i++)\n        action(array[i], i);\n}\nfunction arrayIndexOf(array, item) {\n    // IE9\n    if (typeof Array.prototype.indexOf == \"function\")\n        return Array.prototype.indexOf.call(array, item);\n    for (var i = 0, j = array.length; i < j; i++)\n        if (array[i] === item)\n            return i;\n    return -1;\n}\nfunction arrayFirst(array, predicate, predicateOwner) {\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate.call(predicateOwner, array[i], i))\n            return array[i];\n    return null;\n}\nfunction arrayRemoveItem(array, itemToRemove) {\n    var index = arrayIndexOf(array, itemToRemove);\n    if (index > 0) {\n        array.splice(index, 1);\n    }\n    else if (index === 0) {\n        array.shift();\n    }\n}\nfunction arrayGetDistinctValues(array) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++) {\n        if (arrayIndexOf(result, array[i]) < 0)\n            result.push(array[i]);\n    }\n    return result;\n}\nfunction arrayMap(array, mapping) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        result.push(mapping(array[i], i));\n    return result;\n}\nfunction arrayFilter(array, predicate) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate(array[i], i))\n            result.push(array[i]);\n    return result;\n}\nfunction arrayPushAll(array, valuesToPush) {\n    if (valuesToPush instanceof Array)\n        array.push.apply(array, valuesToPush);\n    else\n        for (var i = 0, j = valuesToPush.length; i < j; i++)\n            array.push(valuesToPush[i]);\n    return array;\n}\nfunction addOrRemoveItem(array, value, included) {\n    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);\n    if (existingEntryIndex < 0) {\n        if (included)\n            array.push(value);\n    }\n    else {\n        if (!included)\n            array.splice(existingEntryIndex, 1);\n    }\n}\nfunction makeArray(arrayLikeObject) {\n    var result = [];\n    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {\n        result.push(arrayLikeObject[i]);\n    }\n    return result;\n}\nfunction range(min, max) {\n    min = typeof min === 'function' ? min() : min;\n    max = typeof max === 'function' ? max() : max;\n    var result = [];\n    for (var i = min; i <= max; i++)\n        result.push(i);\n    return result;\n}\n// Go through the items that have been added and deleted and try to find matches between them.\nfunction findMovesInArrayComparison(left, right, limitFailedCompares) {\n    if (left.length && right.length) {\n        var failedCompares, l, r, leftItem, rightItem;\n        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {\n            for (r = 0; rightItem = right[r]; ++r) {\n                if (leftItem['value'] === rightItem['value']) {\n                    leftItem['moved'] = rightItem['index'];\n                    rightItem['moved'] = leftItem['index'];\n                    right.splice(r, 1); // This item is marked as moved; so remove it from right list\n                    failedCompares = r = 0; // Reset failed compares count because we're checking for consecutive failures\n                    break;\n                }\n            }\n            failedCompares += r;\n        }\n    }\n}\nvar statusNotInOld = 'added';\nvar statusNotInNew = 'deleted';\n// Simple calculation based on Levenshtein distance.\nfunction compareArrays(oldArray, newArray, options) {\n    // For backward compatibility, if the third arg is actually a bool, interpret\n    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.\n    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});\n    oldArray = oldArray || [];\n    newArray = newArray || [];\n    if (oldArray.length < newArray.length)\n        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);\n    else\n        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);\n}\nfunction compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {\n    var myMin = Math.min, myMax = Math.max, editDistanceMatrix = [], smlIndex, smlIndexMax = smlArray.length, bigIndex, bigIndexMax = bigArray.length, compareRange = (bigIndexMax - smlIndexMax) || 1, maxDistance = smlIndexMax + bigIndexMax + 1, thisRow, lastRow, bigIndexMaxForRow, bigIndexMinForRow;\n    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {\n        lastRow = thisRow;\n        editDistanceMatrix.push(thisRow = []);\n        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);\n        bigIndexMinForRow = myMax(0, smlIndex - 1);\n        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {\n            if (!bigIndex)\n                thisRow[bigIndex] = smlIndex + 1;\n            else if (!smlIndex)\n                thisRow[bigIndex] = bigIndex + 1;\n            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])\n                thisRow[bigIndex] = lastRow[bigIndex - 1]; // copy value (no edit)\n            else {\n                var northDistance = lastRow[bigIndex] || maxDistance; // not in big (deletion)\n                var westDistance = thisRow[bigIndex - 1] || maxDistance; // not in small (addition)\n                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;\n            }\n        }\n    }\n    var editScript = [], meMinusOne, notInSml = [], notInBig = [];\n    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {\n        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;\n        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex - 1]) {\n            notInSml.push(editScript[editScript.length] = {\n                'status': statusNotInSml,\n                'value': bigArray[--bigIndex],\n                'index': bigIndex\n            });\n        }\n        else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {\n            notInBig.push(editScript[editScript.length] = {\n                'status': statusNotInBig,\n                'value': smlArray[--smlIndex],\n                'index': smlIndex\n            });\n        }\n        else {\n            --bigIndex;\n            --smlIndex;\n            if (!options['sparse']) {\n                editScript.push({\n                    'status': \"retained\",\n                    'value': bigArray[bigIndex]\n                });\n            }\n        }\n    }\n    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of\n    // smlIndexMax keeps the time complexity of this algorithm linear.\n    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);\n    return editScript.reverse();\n}\n\n//\n// This becomes ko.options\n// --\n//\n// This is the root 'options', which must be extended by others.\nvar _global;\ntry {\n    _global = window;\n}\ncatch (e) {\n    _global = global;\n}\nvar options = {\n    deferUpdates: false,\n    useOnlyNativeEvents: false,\n    protoProperty: '__ko_proto__',\n    // Modify the default attribute from `data-bind`.\n    defaultBindingAttribute: 'data-bind',\n    // Enable/disable <!-- ko binding: ... -> style bindings\n    allowVirtualElements: true,\n    // Global variables that can be accessed from bindings.\n    bindingGlobals: _global,\n    // An instance of the binding provider.\n    bindingProviderInstance: null,\n    // jQuery will be automatically set to _global.jQuery in applyBindings\n    // if it is (strictly equal to) undefined.  Set it to false or null to\n    // disable automatically setting jQuery.\n    jQuery: _global && _global.jQuery,\n    Promise: _global && _global.Promise,\n    taskScheduler: null,\n    debug: false,\n    global: _global,\n    document: _global.document,\n    // Filters for bindings\n    //   data-bind=\"expression | filter_1 | filter_2\"\n    filters: {},\n    onError: function (e) { throw e; },\n    set: function (name, value) {\n        options[name] = value;\n    }\n};\nObject.defineProperty(options, '$', {\n    get: function () { return options.jQuery; }\n});\n\n//\n// Error handling\n// ---\n//\n// The default onError handler is to re-throw.\nfunction catchFunctionErrors(delegate) {\n    return options.onError ? function () {\n        try {\n            return delegate.apply(this, arguments);\n        }\n        catch (e) {\n            options.onError(e);\n        }\n    } : delegate;\n}\nfunction deferError(error) {\n    safeSetTimeout(function () { options.onError(error); }, 0);\n}\nfunction safeSetTimeout(handler, timeout) {\n    return setTimeout(catchFunctionErrors(handler), timeout);\n}\n\n//\n// Asynchronous functionality\n// ---\nfunction throttle(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        if (!timeoutInstance) {\n            timeoutInstance = safeSetTimeout(function () {\n                timeoutInstance = undefined;\n                callback();\n            }, timeout);\n        }\n    };\n}\nfunction debounce(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        clearTimeout(timeoutInstance);\n        timeoutInstance = safeSetTimeout(callback, timeout);\n    };\n}\n\n//\n// Detection and Workarounds for Internet Explorer\n//\n// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)\n// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.\n// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.\n// If there is a future need to detect specific versions of IE10+, we will amend this.\nvar ieVersion = options.document && (function () {\n    var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');\n    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment\n    while (div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',\n        iElems[0]) { }\n    return version > 4 ? version : undefined;\n}());\nvar isIe6 = ieVersion === 6;\nvar isIe7 = ieVersion === 7;\n\n//\n// Object functions\n//\nfunction extend(target, source) {\n    if (source) {\n        for (var prop in source) {\n            if (source.hasOwnProperty(prop)) {\n                target[prop] = source[prop];\n            }\n        }\n    }\n    return target;\n}\nfunction objectForEach(obj, action) {\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            action(prop, obj[prop]);\n        }\n    }\n}\nfunction objectMap(source, mapping) {\n    if (!source)\n        return source;\n    var target = {};\n    for (var prop in source) {\n        if (source.hasOwnProperty(prop)) {\n            target[prop] = mapping(source[prop], prop, source);\n        }\n    }\n    return target;\n}\nfunction getObjectOwnProperty(obj, propName) {\n    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;\n}\nfunction clonePlainObjectDeep(obj, seen) {\n    if (!seen) {\n        seen = [];\n    }\n    if (!obj || typeof obj !== 'object'\n        || obj.constructor !== Object\n        || seen.indexOf(obj) !== -1) {\n        return obj;\n    }\n    // Anything that makes it below is a plain object that has not yet\n    // been seen/cloned.\n    seen.push(obj);\n    var result = {};\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            result[prop] = clonePlainObjectDeep(obj[prop], seen);\n        }\n    }\n    return result;\n}\n\n//\n// Prototype Functions\n//\nvar protoProperty = options.protoProperty;\nvar canSetPrototype = ({ __proto__: [] } instanceof Array);\nfunction setPrototypeOf(obj, proto) {\n    obj.__proto__ = proto;\n    return obj;\n}\nvar setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;\nfunction hasPrototype(instance, prototype) {\n    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined))\n        return false;\n    if (instance[protoProperty] === prototype)\n        return true;\n    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain\n}\n\n//\n// String (and JSON)\n//\nfunction stringTrim(string) {\n    return string === null || string === undefined ? '' :\n        string.trim ?\n            string.trim() :\n            string.toString().replace(/^[\\s\\xa0]+|[\\s\\xa0]+$/g, '');\n}\nfunction stringStartsWith(string, startsWith) {\n    string = string || \"\";\n    if (startsWith.length > string.length)\n        return false;\n    return string.substring(0, startsWith.length) === startsWith;\n}\nfunction parseJson(jsonString) {\n    if (typeof jsonString == \"string\") {\n        jsonString = stringTrim(jsonString);\n        if (jsonString) {\n            if (JSON && JSON.parse)\n                return JSON.parse(jsonString);\n            return (new Function(\"return \" + jsonString))(); // Fallback on less safe parsing for older browsers\n        }\n    }\n    return null;\n}\nfunction stringifyJson(data, replacer, space) {\n    if (!JSON || !JSON.stringify)\n        throw new Error(\"Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js\");\n    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);\n}\n\n//\n// ES6 Symbols\n//\nvar useSymbols = typeof Symbol === 'function';\nfunction createSymbolOrString(identifier) {\n    return useSymbols ? Symbol(identifier) : identifier;\n}\n\n//\n// DOM - CSS\n//\n// For details on the pattern for changing node classes\n// see: https://github.com/knockout/knockout/issues/1597\nvar cssClassNameRegex = /\\S+/g;\nfunction toggleDomNodeCssClass(node, classNames, shouldHaveClass) {\n    var addOrRemoveFn;\n    if (!classNames) {\n        return;\n    }\n    if (typeof node.classList === 'object') {\n        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];\n        arrayForEach(classNames.match(cssClassNameRegex), function (className) {\n            addOrRemoveFn.call(node.classList, className);\n        });\n    }\n    else if (typeof node.className['baseVal'] === 'string') {\n        // SVG tag .classNames is an SVGAnimatedString instance\n        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);\n    }\n    else {\n        // node.className ought to be a string.\n        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);\n    }\n}\nfunction toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {\n    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.\n    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];\n    arrayForEach(classNames.match(cssClassNameRegex), function (className) {\n        addOrRemoveItem(currentClassNames, className, shouldHaveClass);\n    });\n    obj[prop] = currentClassNames.join(\" \");\n}\n\n//\n// jQuery\n//\n// TODO: deprecate in favour of options.$\nvar jQueryInstance = options.global && options.global.jQuery;\nfunction jQuerySetInstance(jquery) {\n    options.jQuery = jQueryInstance = jquery;\n}\n\n//\n// Information about the DOM\n//\nfunction domNodeIsContainedBy(node, containedByNode) {\n    if (node === containedByNode)\n        return true;\n    if (node.nodeType === 11)\n        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8\n    if (containedByNode.contains)\n        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);\n    if (containedByNode.compareDocumentPosition)\n        return (containedByNode.compareDocumentPosition(node) & 16) == 16;\n    while (node && node != containedByNode) {\n        node = node.parentNode;\n    }\n    return !!node;\n}\nfunction domNodeIsAttachedToDocument(node) {\n    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);\n}\nfunction anyDomNodeIsAttachedToDocument(nodes) {\n    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);\n}\nfunction tagNameLower(element) {\n    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.\n    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),\n    // we don't need to do the .toLowerCase() as it will always be lower case anyway.\n    return element && element.tagName && element.tagName.toLowerCase();\n}\nfunction isDomElement(obj) {\n    if (window.HTMLElement) {\n        return obj instanceof HTMLElement;\n    }\n    else {\n        return obj && obj.tagName && obj.nodeType === 1;\n    }\n}\nfunction isDocumentFragment(obj) {\n    if (window.DocumentFragment) {\n        return obj instanceof DocumentFragment;\n    }\n    else {\n        return obj && obj.nodeType === 11;\n    }\n}\n\n//\n// DOM node data\n//\n//\nvar dataStoreKeyExpandoPropertyName = \"__ko__data\" + new Date();\nvar dataStore;\nvar uniqueId = 0;\nvar get;\nvar set;\nvar clear;\n/**\n * --- Legacy getter/setter (may cause memory leaks) ---\n */\nfunction getAll(node, createIfNotFound) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== \"null\") && dataStore[dataStoreKey];\n    if (!hasExistingDataStore) {\n        if (!createIfNotFound)\n            return undefined;\n        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = \"ko\" + uniqueId++;\n        dataStore[dataStoreKey] = {};\n    }\n    return dataStore[dataStoreKey];\n}\nfunction legacyGet(node, key) {\n    var allDataForNode = getAll(node, false);\n    return allDataForNode === undefined ? undefined : allDataForNode[key];\n}\nfunction legacySet(node, key, value) {\n    if (value === undefined) {\n        // Make sure we don't actually create a new domData key if we are actually deleting a value\n        if (getAll(node, false) === undefined)\n            return;\n    }\n    var allDataForNode = getAll(node, true);\n    allDataForNode[key] = value;\n}\nfunction legacyClear(node) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    if (dataStoreKey) {\n        delete dataStore[dataStoreKey];\n        node[dataStoreKeyExpandoPropertyName] = null;\n        return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\n    }\n    return false;\n}\n/**\n * WeakMap get/set/clear\n */\nfunction wmGet(node, key) {\n    return (dataStore.get(node) || {})[key];\n}\nfunction wmSet(node, key, value) {\n    var dataForNode;\n    if (dataStore.has(node)) {\n        dataForNode = dataStore.get(node);\n    }\n    else {\n        dataForNode = {};\n        dataStore.set(node, dataForNode);\n    }\n    dataForNode[key] = value;\n}\nfunction wmClear(node) {\n    return dataStore[\"delete\"](node);\n}\nif ('WeakMap' in options.global) {\n    dataStore = new WeakMap();\n    get = wmGet;\n    set = wmSet;\n    clear = wmClear;\n}\nelse {\n    dataStore = {};\n    get = legacyGet;\n    set = legacySet;\n    clear = legacyClear;\n}\n/**\n * Create a unique key-string identifier.\n * FIXME: This should be deprecated.\n */\nfunction nextKey() {\n    return (uniqueId++) + dataStoreKeyExpandoPropertyName;\n}\n\n\nvar data = Object.freeze({\n\tnextKey: nextKey,\n\tget get () { return get; },\n\tget set () { return set; },\n\tget clear () { return clear; }\n});\n\n//\n// DOM node disposal\n//\n/* eslint no-cond-assign: 0 */\nvar domDataKey = nextKey();\n// Node types:\n// 1: Element\n// 8: Comment\n// 9: Document\nvar cleanableNodeTypes = { 1: true, 8: true, 9: true };\nvar cleanableNodeTypesWithDescendants = { 1: true, 9: true };\nfunction getDisposeCallbacksCollection(node, createIfNotFound) {\n    var allDisposeCallbacks = get(node, domDataKey);\n    if ((allDisposeCallbacks === undefined) && createIfNotFound) {\n        allDisposeCallbacks = [];\n        set(node, domDataKey, allDisposeCallbacks);\n    }\n    return allDisposeCallbacks;\n}\nfunction destroyCallbacksCollection(node) {\n    set(node, domDataKey, undefined);\n}\nfunction cleanSingleNode(node) {\n    // Run all the dispose callbacks\n    var callbacks = getDisposeCallbacksCollection(node, false);\n    if (callbacks) {\n        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)\n        for (var i = 0; i < callbacks.length; i++)\n            callbacks[i](node);\n    }\n    // Erase the DOM data\n    clear(node);\n    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)\n    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {\n        otherNodeCleanerFunctions[i](node);\n    }\n    // Clear any immediate-child comment nodes, as these wouldn't have been found by\n    // node.getElementsByTagName(\"*\") in cleanNode() (comment nodes aren't elements)\n    if (cleanableNodeTypesWithDescendants[node.nodeType])\n        cleanImmediateCommentTypeChildren(node);\n}\nfunction cleanImmediateCommentTypeChildren(nodeWithChildren) {\n    var child, nextChild = nodeWithChildren.firstChild;\n    while (child = nextChild) {\n        nextChild = child.nextSibling;\n        if (child.nodeType === 8)\n            cleanSingleNode(child);\n    }\n}\n// Exports\nfunction addDisposeCallback(node, callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"Callback must be a function\");\n    getDisposeCallbacksCollection(node, true).push(callback);\n}\nfunction removeDisposeCallback(node, callback) {\n    var callbacksCollection = getDisposeCallbacksCollection(node, false);\n    if (callbacksCollection) {\n        arrayRemoveItem(callbacksCollection, callback);\n        if (callbacksCollection.length == 0)\n            destroyCallbacksCollection(node);\n    }\n}\nfunction cleanNode(node) {\n    // First clean this node, where applicable\n    if (cleanableNodeTypes[node.nodeType]) {\n        cleanSingleNode(node);\n        // ... then its descendants, where applicable\n        if (cleanableNodeTypesWithDescendants[node.nodeType]) {\n            // Clone the descendants list in case it changes during iteration\n            var descendants = [];\n            arrayPushAll(descendants, node.getElementsByTagName(\"*\"));\n            for (var i = 0, j = descendants.length; i < j; i++)\n                cleanSingleNode(descendants[i]);\n        }\n    }\n    return node;\n}\nfunction removeNode(node) {\n    cleanNode(node);\n    if (node.parentNode)\n        node.parentNode.removeChild(node);\n}\n// Expose supplemental node cleaning functions.\nvar otherNodeCleanerFunctions = [];\n// Special support for jQuery here because it's so commonly used.\n// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData\n// so notify it to tear down any resources associated with the node & descendants here.\nfunction cleanjQueryData(node) {\n    var jQueryCleanNodeFn = jQueryInstance\n        ? jQueryInstance.cleanData : null;\n    if (jQueryCleanNodeFn) {\n        jQueryCleanNodeFn([node]);\n    }\n}\notherNodeCleanerFunctions.push(cleanjQueryData);\n\n//\n// DOM Events\n//\n// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)\nvar knownEvents = {};\nvar knownEventTypesByEventName = {};\nvar keyEventTypeName = (options.global.navigator && /Firefox\\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';\nknownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];\nknownEvents['MouseEvents'] = [\n    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',\n    'mouseout', 'mouseenter', 'mouseleave'\n];\nobjectForEach(knownEvents, function (eventType, knownEventsForType) {\n    if (knownEventsForType.length) {\n        for (var i = 0, j = knownEventsForType.length; i < j; i++)\n            knownEventTypesByEventName[knownEventsForType[i]] = eventType;\n    }\n});\nfunction isClickOnCheckableElement(element, eventType) {\n    if ((tagNameLower(element) !== \"input\") || !element.type)\n        return false;\n    if (eventType.toLowerCase() != \"click\")\n        return false;\n    var inputType = element.type;\n    return (inputType == \"checkbox\") || (inputType == \"radio\");\n}\n// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406\nvar eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };\nfunction registerEventHandler(element, eventType, handler) {\n    var wrappedHandler = catchFunctionErrors(handler);\n    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];\n    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {\n        jQueryInstance(element).bind(eventType, wrappedHandler);\n    }\n    else if (!mustUseAttachEvent && typeof element.addEventListener == \"function\")\n        element.addEventListener(eventType, wrappedHandler, false);\n    else if (typeof element.attachEvent !== \"undefined\") {\n        var attachEventHandler = function (event) { wrappedHandler.call(element, event); }, attachEventName = \"on\" + eventType;\n        element.attachEvent(attachEventName, attachEventHandler);\n        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)\n        // so to avoid leaks, we have to remove them manually. See bug #856\n        addDisposeCallback(element, function () {\n            element.detachEvent(attachEventName, attachEventHandler);\n        });\n    }\n    else\n        throw new Error(\"Browser doesn't support addEventListener or attachEvent\");\n}\nfunction triggerEvent(element, eventType) {\n    if (!(element && element.nodeType))\n        throw new Error(\"element must be a DOM node when calling triggerEvent\");\n    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the\n    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)\n    // IE doesn't change the checked state when you trigger the click event using \"fireEvent\".\n    // In both cases, we'll use the click method instead.\n    var useClickWorkaround = isClickOnCheckableElement(element, eventType);\n    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {\n        jQueryInstance(element).trigger(eventType);\n    }\n    else if (typeof document.createEvent == \"function\") {\n        if (typeof element.dispatchEvent == \"function\") {\n            var eventCategory = knownEventTypesByEventName[eventType] || \"HTMLEvents\";\n            var event = document.createEvent(eventCategory);\n            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);\n            element.dispatchEvent(event);\n        }\n        else\n            throw new Error(\"The supplied element doesn't support dispatchEvent\");\n    }\n    else if (useClickWorkaround && element.click) {\n        element.click();\n    }\n    else if (typeof element.fireEvent != \"undefined\") {\n        element.fireEvent(\"on\" + eventType);\n    }\n    else {\n        throw new Error(\"Browser doesn't support triggering events\");\n    }\n}\n\n//\n//  DOM node manipulation\n//\nfunction fixUpContinuousNodeArray(continuousNodeArray, parentNode) {\n    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile\n    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that\n    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been\n    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.\n    // So, this function translates the old \"map\" output array into its best guess of the set of current DOM nodes.\n    //\n    // Rules:\n    //   [A] Any leading nodes that have been removed should be ignored\n    //       These most likely correspond to memoization nodes that were already removed during binding\n    //       See https://github.com/knockout/knockout/pull/440\n    //   [B] Any trailing nodes that have been remove should be ignored\n    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]\n    //       See https://github.com/knockout/knockout/pull/1903\n    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,\n    //       and include any nodes that have been inserted among the previous collection\n    if (continuousNodeArray.length) {\n        // The parent node can be a virtual element; so get the real parent node\n        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;\n        // Rule [A]\n        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)\n            continuousNodeArray.splice(0, 1);\n        // Rule [B]\n        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)\n            continuousNodeArray.length--;\n        // Rule [C]\n        if (continuousNodeArray.length > 1) {\n            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];\n            // Replace with the actual new continuous node set\n            continuousNodeArray.length = 0;\n            while (current !== last) {\n                continuousNodeArray.push(current);\n                current = current.nextSibling;\n            }\n            continuousNodeArray.push(last);\n        }\n    }\n    return continuousNodeArray;\n}\nfunction setOptionNodeSelectionState(optionNode, isSelected) {\n    // IE6 sometimes throws \"unknown error\" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.\n    if (ieVersion < 7)\n        optionNode.setAttribute(\"selected\", isSelected);\n    else\n        optionNode.selected = isSelected;\n}\nfunction forceRefresh(node) {\n    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209\n    if (ieVersion >= 9) {\n        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container\n        var elem = node.nodeType == 1 ? node : node.parentNode;\n        if (elem.style)\n            elem.style.zoom = elem.style.zoom;\n    }\n}\nfunction ensureSelectElementIsRenderedCorrectly(selectElement) {\n    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.\n    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)\n    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)\n    if (ieVersion) {\n        var originalWidth = selectElement.style.width;\n        selectElement.style.width = 0;\n        selectElement.style.width = originalWidth;\n    }\n}\n\n/* eslint no-cond-assign: 0 */\n//\n// Virtual Elements\n//\n//\n// \"Virtual elements\" is an abstraction on top of the usual DOM API which understands the notion that comment nodes\n// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).\n// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state\n// of that virtual hierarchy\n//\n// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)\n// without having to scatter special cases all over the binding and templating code.\n// IE 9 cannot reliably read the \"nodeValue\" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)\n// but it does give them a nonstandard alternative property called \"text\" that it can read reliably. Other browsers don't have that property.\n// So, use node.text where available, and node.nodeValue elsewhere\nvar commentNodesHaveTextProperty = options.document && options.document.createComment(\"test\").text === \"<!--test-->\";\nvar startCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*ko(?:\\s+([\\s\\S]+))?\\s*-->$/ : /^\\s*ko(?:\\s+([\\s\\S]+))?\\s*$/;\nvar endCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*\\/ko\\s*-->$/ : /^\\s*\\/ko\\s*$/;\nvar htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };\nfunction isStartComment(node) {\n    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\nfunction isEndComment(node) {\n    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\nfunction getVirtualChildren(startComment, allowUnbalanced) {\n    var currentNode = startComment;\n    var depth = 1;\n    var children = [];\n    while (currentNode = currentNode.nextSibling) {\n        if (isEndComment(currentNode)) {\n            depth--;\n            if (depth === 0)\n                return children;\n        }\n        children.push(currentNode);\n        if (isStartComment(currentNode))\n            depth++;\n    }\n    if (!allowUnbalanced)\n        throw new Error(\"Cannot find closing comment tag to match: \" + startComment.nodeValue);\n    return null;\n}\nfunction getMatchingEndComment(startComment, allowUnbalanced) {\n    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);\n    if (allVirtualChildren) {\n        if (allVirtualChildren.length > 0)\n            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;\n        return startComment.nextSibling;\n    }\n    else\n        return null; // Must have no matching end comment, and allowUnbalanced is true\n}\nfunction getUnbalancedChildTags(node) {\n    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>\n    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->\n    var childNode = node.firstChild, captureRemaining = null;\n    if (childNode) {\n        do {\n            if (captureRemaining)\n                captureRemaining.push(childNode);\n            else if (isStartComment(childNode)) {\n                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);\n                if (matchingEndComment)\n                    childNode = matchingEndComment;\n                else\n                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point\n            }\n            else if (isEndComment(childNode)) {\n                captureRemaining = [childNode]; // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n    return captureRemaining;\n}\nvar allowedBindings = {};\nvar hasBindingValue = isStartComment;\nfunction childNodes(node) {\n    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;\n}\nfunction emptyNode(node) {\n    if (!isStartComment(node))\n        emptyDomNode(node);\n    else {\n        var virtualChildren = childNodes(node);\n        for (var i = 0, j = virtualChildren.length; i < j; i++)\n            removeNode(virtualChildren[i]);\n    }\n}\nfunction setDomNodeChildren$1(node, childNodes) {\n    if (!isStartComment(node))\n        setDomNodeChildren(node, childNodes);\n    else {\n        emptyNode(node);\n        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children\n        for (var i = 0, j = childNodes.length; i < j; i++)\n            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);\n    }\n}\nfunction prepend(containerNode, nodeToPrepend) {\n    if (!isStartComment(containerNode)) {\n        if (containerNode.firstChild)\n            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);\n        else\n            containerNode.appendChild(nodeToPrepend);\n    }\n    else {\n        // Start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);\n    }\n}\nfunction insertAfter(containerNode, nodeToInsert, insertAfterNode) {\n    if (!insertAfterNode) {\n        prepend(containerNode, nodeToInsert);\n    }\n    else if (!isStartComment(containerNode)) {\n        // Insert after insertion point\n        if (insertAfterNode.nextSibling)\n            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n        else\n            containerNode.appendChild(nodeToInsert);\n    }\n    else {\n        // Children of start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n    }\n}\nfunction firstChild(node) {\n    if (!isStartComment(node)) {\n        return node.firstChild;\n    }\n    if (!node.nextSibling || isEndComment(node.nextSibling)) {\n        return null;\n    }\n    return node.nextSibling;\n}\nfunction lastChild(node) {\n    var nextChild = firstChild(node), lastChildNode;\n    do {\n        lastChildNode = nextChild;\n    } while (nextChild = nextSibling(nextChild));\n    return lastChildNode;\n}\nfunction nextSibling(node) {\n    if (isStartComment(node))\n        node = getMatchingEndComment(node);\n    if (node.nextSibling && isEndComment(node.nextSibling))\n        return null;\n    return node.nextSibling;\n}\nfunction previousSibling(node) {\n    var depth = 0;\n    do {\n        if (node.nodeType === 8) {\n            if (isStartComment(node)) {\n                if (--depth === 0) {\n                    return node;\n                }\n            }\n            else if (isEndComment(node)) {\n                depth++;\n            }\n        }\n        else {\n            if (depth === 0) {\n                return node;\n            }\n        }\n    } while (node = node.previousSibling);\n    return;\n}\nfunction virtualNodeBindingValue(node) {\n    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);\n    return regexMatch ? regexMatch[1] : null;\n}\nfunction normaliseVirtualElementDomStructure(elementVerified) {\n    // Workaround for https://github.com/SteveSanderson/knockout/issues/155\n    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes\n    // that are direct descendants of <ul> into the preceding <li>)\n    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])\n        return;\n    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags\n    // must be intended to appear *after* that child, so move them there.\n    var childNode = elementVerified.firstChild;\n    if (childNode) {\n        do {\n            if (childNode.nodeType === 1) {\n                var unbalancedTags = getUnbalancedChildTags(childNode);\n                if (unbalancedTags) {\n                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child\n                    var nodeToInsertBefore = childNode.nextSibling;\n                    for (var i = 0; i < unbalancedTags.length; i++) {\n                        if (nodeToInsertBefore)\n                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);\n                        else\n                            elementVerified.appendChild(unbalancedTags[i]);\n                    }\n                }\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n}\n\n\n\nvar virtualElements = Object.freeze({\n\tstartCommentRegex: startCommentRegex,\n\tendCommentRegex: endCommentRegex,\n\tisStartComment: isStartComment,\n\tisEndComment: isEndComment,\n\tgetVirtualChildren: getVirtualChildren,\n\tallowedBindings: allowedBindings,\n\thasBindingValue: hasBindingValue,\n\tchildNodes: childNodes,\n\temptyNode: emptyNode,\n\tsetDomNodeChildren: setDomNodeChildren$1,\n\tprepend: prepend,\n\tinsertAfter: insertAfter,\n\tfirstChild: firstChild,\n\tlastChild: lastChild,\n\tnextSibling: nextSibling,\n\tpreviousSibling: previousSibling,\n\tvirtualNodeBindingValue: virtualNodeBindingValue,\n\tnormaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure\n});\n\n//\n// DOM manipulation\n//\n/* eslint no-empty: 0 */\nfunction moveCleanedNodesToContainerElement(nodes) {\n    // Ensure it's a real array, as we're about to reparent the nodes and\n    // we don't want the underlying collection to change while we're doing that.\n    var nodesArray = makeArray(nodes);\n    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;\n    var container = templateDocument.createElement('div');\n    for (var i = 0, j = nodesArray.length; i < j; i++) {\n        container.appendChild(cleanNode(nodesArray[i]));\n    }\n    return container;\n}\nfunction cloneNodes(nodesArray, shouldCleanNodes) {\n    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {\n        var clonedNode = nodesArray[i].cloneNode(true);\n        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);\n    }\n    return newNodesArray;\n}\nfunction setDomNodeChildren(domNode, childNodes$$1) {\n    emptyDomNode(domNode);\n    if (childNodes$$1) {\n        for (var i = 0, j = childNodes$$1.length; i < j; i++)\n            domNode.appendChild(childNodes$$1[i]);\n    }\n}\nfunction replaceDomNodes(nodeToReplaceOrNodeArray, newNodesArray) {\n    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;\n    if (nodesToReplaceArray.length > 0) {\n        var insertionPoint = nodesToReplaceArray[0];\n        var parent = insertionPoint.parentNode;\n        for (var i = 0, j = newNodesArray.length; i < j; i++)\n            parent.insertBefore(newNodesArray[i], insertionPoint);\n        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {\n            removeNode(nodesToReplaceArray[i]);\n        }\n    }\n}\nfunction setElementName(element, name) {\n    element.name = name;\n    // Workaround IE 6/7 issue\n    // - https://github.com/SteveSanderson/knockout/issues/197\n    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/\n    if (ieVersion <= 7) {\n        try {\n            element.mergeAttributes(document.createElement(\"<input name='\" + element.name + \"'/>\"), false);\n        }\n        catch (e) { } // For IE9 with doc mode \"IE9 Standards\" and browser mode \"IE9 Compatibility View\"\n    }\n}\nfunction setTextContent(element, textContent) {\n    var value = typeof textContent === 'function' ? textContent() : textContent;\n    if ((value === null) || (value === undefined))\n        value = \"\";\n    // We need there to be exactly one child: a text node.\n    // If there are no children, more than one, or if it's not a text node,\n    // we'll clear everything and create a single text node.\n    var innerTextNode = firstChild(element);\n    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {\n        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);\n    }\n    else {\n        innerTextNode.data = value;\n    }\n    forceRefresh(element);\n}\nfunction emptyDomNode(domNode) {\n    while (domNode.firstChild) {\n        removeNode(domNode.firstChild);\n    }\n}\n\n//\n// HTML-based manipulation\n//\nvar none = [0, \"\", \"\"];\nvar table = [1, \"<table>\", \"</table>\"];\nvar tbody = [2, \"<table><tbody>\", \"</tbody></table>\"];\nvar colgroup = [2, \"<table><tbody></tbody><colgroup>\", \"</colgroup></table>\"];\nvar tr = [3, \"<table><tbody><tr>\", \"</tr></tbody></table>\"];\nvar select = [1, \"<select multiple='multiple'>\", \"</select>\"];\nvar fieldset = [1, \"<fieldset>\", \"</fieldset>\"];\nvar map = [1, \"<map>\", \"</map>\"];\nvar object = [1, \"<object>\", \"</object>\"];\nvar lookup = {\n    'area': map,\n    'col': colgroup,\n    'colgroup': table,\n    'caption': table,\n    'legend': fieldset,\n    'thead': table,\n    'tbody': table,\n    'tfoot': table,\n    'tr': tbody,\n    'td': tr,\n    'th': tr,\n    'option': select,\n    'optgroup': select,\n    'param': object\n};\nvar supportsTemplateTag = options.document && 'content' in options.document.createElement('template');\nfunction getWrap(tags) {\n    var m = tags.match(/^<([a-z]+)[ >]/);\n    return (m && lookup[m[1]]) || none;\n}\nfunction simpleHtmlParse(html, documentContext) {\n    documentContext || (documentContext = document);\n    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;\n    // Based on jQuery's \"clean\" function, but only accounting for table-related elements.\n    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's \"clean\" function directly\n    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of\n    // a descendant node. For example: \"<div><!-- mycomment -->abc</div>\" will get parsed as \"<div>abc</div>\"\n    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node\n    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.\n    // Trim whitespace, otherwise indexOf won't work as expected\n    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement(\"div\"), wrap = getWrap(tags), depth = wrap[0];\n    // Go to html and back, then peel off extra wrappers\n    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.\n    var markup = \"ignored<div>\" + wrap[1] + html + wrap[2] + \"</div>\";\n    if (typeof windowContext['innerShiv'] == \"function\") {\n        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding\n        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv\n        // somehow shims the native APIs so it just works anyway)\n        div.appendChild(windowContext['innerShiv'](markup));\n    }\n    else {\n        div.innerHTML = markup;\n    }\n    // Move to the right depth\n    while (depth--)\n        div = div.lastChild;\n    return makeArray(div.lastChild.childNodes);\n}\nfunction templateHtmlParse(html, documentContext) {\n    if (!documentContext) {\n        documentContext = document;\n    }\n    var template = documentContext.createElement('template');\n    template.innerHTML = html;\n    return makeArray(template.content.childNodes);\n}\nfunction jQueryHtmlParse(html, documentContext) {\n    // jQuery's \"parseHTML\" function was introduced in jQuery 1.8.0 and is a documented public API.\n    if (jQueryInstance.parseHTML) {\n        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null\n    }\n    else {\n        // For jQuery < 1.8.0, we fall back on the undocumented internal \"clean\" function.\n        var elems = jQueryInstance.clean([html], documentContext);\n        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.\n        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.\n        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.\n        if (elems && elems[0]) {\n            // Find the top-most parent element that's a direct child of a document fragment\n            var elem = elems[0];\n            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)\n                elem = elem.parentNode;\n            // ... then detach it\n            if (elem.parentNode)\n                elem.parentNode.removeChild(elem);\n        }\n        return elems;\n    }\n}\n/**\n * parseHtmlFragment converts a string into an array of DOM Nodes.\n * If supported, it uses <template>-tag parsing, falling back on\n * jQuery parsing (if jQuery is present), and finally on a\n * straightforward parser.\n *\n * @param  {string} html            To be parsed.\n * @param  {Object} documentContext That owns the executing code.\n * @return {[DOMNode]}              Parsed DOM Nodes\n */\nfunction parseHtmlFragment(html, documentContext) {\n    // Prefer <template>-tag based HTML parsing.\n    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :\n        // Benefit from jQuery's on old browsers, where possible\n        // NOTE: jQuery's HTML parsing fails on element names like tr-*.\n        // See: https://github.com/jquery/jquery/pull/1988\n        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :\n            // ... otherwise, this simple logic will do in most common cases.\n            simpleHtmlParse(html, documentContext));\n}\n/**\n  * setHtml empties the node's contents, unwraps the HTML, and\n  * sets the node's HTML using jQuery.html or parseHtmlFragment\n  *\n  * @param {DOMNode} node Node in which HTML needs to be set\n  * @param {DOMNode} html HTML to be inserted in node\n  * @returns undefined\n  */\nfunction setHtml(node, html) {\n    emptyDomNode(node);\n    // There's few cases where we would want to display a stringified\n    // function, so we unwrap it.\n    if (typeof html === 'function') {\n        html = html();\n    }\n    if ((html !== null) && (html !== undefined)) {\n        if (typeof html !== 'string')\n            html = html.toString();\n        // If the browser supports <template> tags, prefer that, as\n        // it obviates all the complex workarounds of jQuery.\n        //\n        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,\n        // for example <tr> elements which are not normally allowed to exist on their own.\n        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.\n        if (jQueryInstance && !supportsTemplateTag) {\n            jQueryInstance(node).html(html);\n        }\n        else {\n            // ... otherwise, use KO's own parsing logic.\n            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);\n            if (node.nodeType === 8) {\n                if (html === null) {\n                    emptyNode(node);\n                }\n                else {\n                    setDomNodeChildren$1(node, parsedNodes);\n                }\n            }\n            else {\n                for (var i = 0; i < parsedNodes.length; i++)\n                    node.appendChild(parsedNodes[i]);\n            }\n        }\n    }\n}\n\n//\n// Memoization\n//\nvar memos = {};\nfunction randomMax8HexChars() {\n    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);\n}\nfunction generateRandomId() {\n    return randomMax8HexChars() + randomMax8HexChars();\n}\nfunction findMemoNodes(rootNode, appendToArray) {\n    if (!rootNode)\n        return;\n    if (rootNode.nodeType == 8) {\n        var memoId = parseMemoText(rootNode.nodeValue);\n        if (memoId != null)\n            appendToArray.push({ domNode: rootNode, memoId: memoId });\n    }\n    else if (rootNode.nodeType == 1) {\n        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)\n            findMemoNodes(childNodes[i], appendToArray);\n    }\n}\nfunction memoize(callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"You can only pass a function to memoization.memoize()\");\n    var memoId = generateRandomId();\n    memos[memoId] = callback;\n    return \"<!--[ko_memo:\" + memoId + \"]-->\";\n}\nfunction unmemoize(memoId, callbackParams) {\n    var callback = memos[memoId];\n    if (callback === undefined)\n        throw new Error(\"Couldn't find any memo with ID \" + memoId + \". Perhaps it's already been unmemoized.\");\n    try {\n        callback.apply(null, callbackParams || []);\n        return true;\n    }\n    finally {\n        delete memos[memoId];\n    }\n}\nfunction unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {\n    var memos = [];\n    findMemoNodes(domNode, memos);\n    for (var i = 0, j = memos.length; i < j; i++) {\n        var node = memos[i].domNode;\n        var combinedParams = [node];\n        if (extraCallbackParamsArray)\n            arrayPushAll(combinedParams, extraCallbackParamsArray);\n        unmemoize(memos[i].memoId, combinedParams);\n        node.nodeValue = \"\"; // Neuter this node so we don't try to unmemoize it again\n        if (node.parentNode)\n            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)\n    }\n}\nfunction parseMemoText(memoText) {\n    var match = memoText.match(/^\\[ko_memo\\:(.*?)\\]$/);\n    return match ? match[1] : null;\n}\n\n\n\nvar memoization = Object.freeze({\n\tmemoize: memoize,\n\tunmemoize: unmemoize,\n\tunmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,\n\tparseMemoText: parseMemoText\n});\n\n//\n//  Tasks Micro-scheduler\n//  ===\n//\n/* eslint no-cond-assign: 0 */\nvar taskQueue = [];\nvar taskQueueLength = 0;\nvar nextHandle = 1;\nvar nextIndexToProcess = 0;\nvar w = options.global;\nif (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {\n    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node\n    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT\n    options.taskScheduler = (function (callback) {\n        var div = w.document.createElement(\"div\");\n        new MutationObserver(callback).observe(div, { attributes: true });\n        return function () { div.classList.toggle(\"foo\"); };\n    })(scheduledProcess);\n}\nelse if (w && w.document && \"onreadystatechange\" in w.document.createElement(\"script\")) {\n    // IE 6-10\n    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT\n    options.taskScheduler = function (callback) {\n        var script = document.createElement(\"script\");\n        script.onreadystatechange = function () {\n            script.onreadystatechange = null;\n            document.documentElement.removeChild(script);\n            script = null;\n            callback();\n        };\n        document.documentElement.appendChild(script);\n    };\n}\nelse {\n    options.taskScheduler = function (callback) {\n        setTimeout(callback, 0);\n    };\n}\nfunction processTasks() {\n    if (taskQueueLength) {\n        // Each mark represents the end of a logical group of tasks and the number of these groups is\n        // limited to prevent unchecked recursion.\n        var mark = taskQueueLength, countMarks = 0;\n        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue\n        for (var task; nextIndexToProcess < taskQueueLength;) {\n            if (task = taskQueue[nextIndexToProcess++]) {\n                if (nextIndexToProcess > mark) {\n                    if (++countMarks >= 5000) {\n                        nextIndexToProcess = taskQueueLength; // skip all tasks remaining in the queue since any of them could be causing the recursion\n                        deferError(Error(\"'Too much recursion' after processing \" + countMarks + \" task groups.\"));\n                        break;\n                    }\n                    mark = taskQueueLength;\n                }\n                try {\n                    task();\n                }\n                catch (ex) {\n                    deferError(ex);\n                }\n            }\n        }\n    }\n}\nfunction scheduledProcess() {\n    processTasks();\n    // Reset the queue\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n}\nfunction scheduleTaskProcessing() {\n    options.taskScheduler(scheduledProcess);\n}\nfunction schedule(func) {\n    if (!taskQueueLength) {\n        scheduleTaskProcessing();\n    }\n    taskQueue[taskQueueLength++] = func;\n    return nextHandle++;\n}\nfunction cancel(handle) {\n    var index = handle - (nextHandle - taskQueueLength);\n    if (index >= nextIndexToProcess && index < taskQueueLength) {\n        taskQueue[index] = null;\n    }\n}\n// For testing only: reset the queue and return the previous queue length\nfunction resetForTesting() {\n    var length = taskQueueLength - nextIndexToProcess;\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n    return length;\n}\n\n\nvar tasks = Object.freeze({\n\tschedule: schedule,\n\tcancel: cancel,\n\tresetForTesting: resetForTesting,\n\trunEarly: processTasks\n});\n\n/*\n  tko.util\n  ===\n\n\n*/\n// Sub-Modules;\n\nexport { tasks, virtualElements, data as domData, memoization, jQuerySetInstance, options, arrayForEach, arrayIndexOf, arrayFirst, arrayRemoveItem, arrayGetDistinctValues, arrayMap, arrayFilter, arrayPushAll, addOrRemoveItem, makeArray, range, findMovesInArrayComparison, compareArrays, throttle, debounce, catchFunctionErrors, deferError, safeSetTimeout, ieVersion, isIe6, isIe7, extend, objectForEach, objectMap, getObjectOwnProperty, clonePlainObjectDeep, canSetPrototype, setPrototypeOf, setPrototypeOfOrExtend, hasPrototype, stringTrim, stringStartsWith, parseJson, stringifyJson, useSymbols, createSymbolOrString, toggleDomNodeCssClass, registerEventHandler, triggerEvent, domNodeIsContainedBy, domNodeIsAttachedToDocument, anyDomNodeIsAttachedToDocument, tagNameLower, isDomElement, isDocumentFragment, moveCleanedNodesToContainerElement, cloneNodes, setDomNodeChildren, replaceDomNodes, setElementName, setTextContent, emptyDomNode, fixUpContinuousNodeArray, setOptionNodeSelectionState, forceRefresh, ensureSelectElementIsRenderedCorrectly, parseHtmlFragment, setHtml, addDisposeCallback, removeDisposeCallback, cleanNode, removeNode, otherNodeCleanerFunctions, cleanjQueryData };\n//# sourceMappingURL=tko.utils.js.map\n","import { arrayForEach, arrayIndexOf, arrayRemoveItem, canSetPrototype, compareArrays, createSymbolOrString, debounce, extend, findMovesInArrayComparison, hasPrototype, objectForEach, options, setPrototypeOf, setPrototypeOfOrExtend, stringifyJson, tasks, throttle } from 'tko.utils';\n\n//\n//  Defer Updates\n//  ===\n//\nfunction deferUpdates(target) {\n    if (!target._deferUpdates) {\n        target._deferUpdates = true;\n        target.limit(function (callback) {\n            var handle;\n            return function () {\n                tasks.cancel(handle);\n                handle = tasks.schedule(callback);\n                target.notifySubscribers(undefined, 'dirty');\n            };\n        });\n    }\n}\n\n//\n// Observable extenders\n// ---\n//\nvar primitiveTypes = {\n    'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1\n};\nfunction valuesArePrimitiveAndEqual(a, b) {\n    var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);\n    return oldValueIsPrimitive ? (a === b) : false;\n}\nfunction applyExtenders(requestedExtenders) {\n    var target = this;\n    if (requestedExtenders) {\n        objectForEach(requestedExtenders, function (key, value) {\n            var extenderHandler = extenders[key];\n            if (typeof extenderHandler === 'function') {\n                target = extenderHandler(target, value) || target;\n            }\n            else {\n                options.onError(new Error('Extender not found: ' + key));\n            }\n        });\n    }\n    return target;\n}\n/*\n                --- DEFAULT EXTENDERS ---\n */\n// Change when notifications are published.\nfunction notify(target, notifyWhen) {\n    target.equalityComparer = notifyWhen == 'always' ?\n        null : // null equalityComparer means to always notify\n        valuesArePrimitiveAndEqual;\n}\nfunction deferred(target, option) {\n    if (option !== true) {\n        throw new Error('The \\'deferred\\' extender only accepts the value \\'true\\', because it is not supported to turn deferral off once enabled.');\n    }\n    deferUpdates(target);\n}\nfunction rateLimit(target, options$$1) {\n    var timeout, method, limitFunction;\n    if (typeof options$$1 === 'number') {\n        timeout = options$$1;\n    }\n    else {\n        timeout = options$$1.timeout;\n        method = options$$1.method;\n    }\n    // rateLimit supersedes deferred updates\n    target._deferUpdates = false;\n    limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;\n    target.limit(function (callback) {\n        return limitFunction(callback, timeout);\n    });\n}\nvar extenders = {\n    notify: notify,\n    deferred: deferred,\n    rateLimit: rateLimit\n};\n\n/* eslint no-cond-assign: 0 */\nfunction subscription(target, callback, disposeCallback) {\n    this._target = target;\n    this.callback = callback;\n    this.disposeCallback = disposeCallback;\n    this.isDisposed = false;\n}\nsubscription.prototype.dispose = function () {\n    this.isDisposed = true;\n    this.disposeCallback();\n};\nfunction subscribable() {\n    setPrototypeOfOrExtend(this, ko_subscribable_fn);\n    ko_subscribable_fn.init(this);\n}\nvar defaultEvent = 'change';\nvar ko_subscribable_fn = {\n    init: function (instance) {\n        instance._subscriptions = {};\n        instance._versionNumber = 1;\n    },\n    subscribe: function (callback, callbackTarget, event) {\n        var self = this;\n        event = event || defaultEvent;\n        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;\n        var subscriptionInstance = new subscription(self, boundCallback, function () {\n            arrayRemoveItem(self._subscriptions[event], subscriptionInstance);\n            if (self.afterSubscriptionRemove) {\n                self.afterSubscriptionRemove(event);\n            }\n        });\n        if (self.beforeSubscriptionAdd) {\n            self.beforeSubscriptionAdd(event);\n        }\n        if (!self._subscriptions[event]) {\n            self._subscriptions[event] = [];\n        }\n        self._subscriptions[event].push(subscriptionInstance);\n        return subscriptionInstance;\n    },\n    notifySubscribers: function (valueToNotify, event) {\n        event = event || defaultEvent;\n        if (event === defaultEvent) {\n            this.updateVersion();\n        }\n        if (this.hasSubscriptionsForEvent(event)) {\n            try {\n                begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)\n                for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {\n                    // In case a subscription was disposed during the arrayForEach cycle, check\n                    // for isDisposed on each subscription before invoking its callback\n                    if (!subscriptionInstance.isDisposed) {\n                        subscriptionInstance.callback(valueToNotify);\n                    }\n                }\n            }\n            finally {\n                end(); // End suppressing dependency detection\n            }\n        }\n    },\n    getVersion: function () {\n        return this._versionNumber;\n    },\n    hasChanged: function (versionToCheck) {\n        return this.getVersion() !== versionToCheck;\n    },\n    updateVersion: function () {\n        ++this._versionNumber;\n    },\n    hasSubscriptionsForEvent: function (event) {\n        return this._subscriptions[event] && this._subscriptions[event].length;\n    },\n    getSubscriptionsCount: function (event) {\n        if (event) {\n            return this._subscriptions[event] && this._subscriptions[event].length || 0;\n        }\n        else {\n            var total = 0;\n            objectForEach(this._subscriptions, function (eventName, subscriptions) {\n                if (eventName !== 'dirty') {\n                    total += subscriptions.length;\n                }\n            });\n            return total;\n        }\n    },\n    isDifferent: function (oldValue, newValue) {\n        return !this.equalityComparer ||\n            !this.equalityComparer(oldValue, newValue);\n    },\n    once: function (cb) {\n        var subs = this.subscribe(function (nv) {\n            subs.dispose();\n            cb(nv);\n        });\n    },\n    when: function (test, returnValue) {\n        var _this = this;\n        var current = this.peek();\n        var givenRv = arguments.length > 1;\n        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };\n        if (testFn(current)) {\n            return options.Promise.resolve(givenRv ? returnValue : current);\n        }\n        return new options.Promise(function (resolve, reject) {\n            var subs = _this.subscribe(function (newValue) {\n                if (testFn(newValue)) {\n                    subs.dispose();\n                    resolve(givenRv ? returnValue : newValue);\n                }\n            });\n        });\n    },\n    yet: function (test) {\n        var args = [];\n        for (var _i = 1; _i < arguments.length; _i++) {\n            args[_i - 1] = arguments[_i];\n        }\n        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };\n        var negated = function (v) { return !testFn(v); };\n        return this.when.apply(this, [negated].concat(args));\n    },\n    next: function () {\n        var _this = this;\n        return new Promise(function (resolve) { return _this.once(resolve); });\n    },\n    extend: applyExtenders\n};\n// For browsers that support proto assignment, we overwrite the prototype of each\n// observable instance. Since observables are functions, we need Function.prototype\n// to still be in the prototype chain.\nif (canSetPrototype) {\n    setPrototypeOf(ko_subscribable_fn, Function.prototype);\n}\nsubscribable.fn = ko_subscribable_fn;\nfunction isSubscribable(instance) {\n    return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function';\n}\n\n//\n// dependencyDetection\n// ---\n//\n// In KO 3.x, dependencyDetection was also known as computedContext.\n//\nvar outerFrames = [];\nvar currentFrame;\nvar lastId = 0;\n// Return a unique ID that can be assigned to an observable for dependency tracking.\n// Theoretically, you could eventually overflow the number storage size, resulting\n// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53\n// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would\n// take over 285 years to reach that number.\n// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html\nfunction getId() {\n    return ++lastId;\n}\nfunction begin(options$$1) {\n    outerFrames.push(currentFrame);\n    currentFrame = options$$1;\n}\nfunction end() {\n    currentFrame = outerFrames.pop();\n}\nfunction registerDependency(subscribable$$1) {\n    if (currentFrame) {\n        if (!isSubscribable(subscribable$$1)) {\n            throw new Error('Only subscribable things can act as dependencies');\n        }\n        currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));\n    }\n}\nfunction ignore(callback, callbackTarget, callbackArgs) {\n    try {\n        begin();\n        return callback.apply(callbackTarget, callbackArgs || []);\n    }\n    finally {\n        end();\n    }\n}\nfunction getDependenciesCount() {\n    if (currentFrame) {\n        return currentFrame.computed.getDependenciesCount();\n    }\n}\nfunction isInitial() {\n    if (currentFrame) {\n        return currentFrame.isInitial;\n    }\n}\n\n\nvar dependencyDetection = Object.freeze({\n\tbegin: begin,\n\tend: end,\n\tregisterDependency: registerDependency,\n\tignore: ignore,\n\tgetDependenciesCount: getDependenciesCount,\n\tisInitial: isInitial,\n\tignoreDependencies: ignore\n});\n\n//\n//  Observable values\n//  ---\n//\nvar observableLatestValue = createSymbolOrString('_latestValue');\nfunction observable(initialValue) {\n    function Observable() {\n        if (arguments.length > 0) {\n            // Write\n            // Ignore writes if the value hasn't changed\n            if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {\n                Observable.valueWillMutate();\n                Observable[observableLatestValue] = arguments[0];\n                Observable.valueHasMutated();\n            }\n            return this; // Permits chained assignments\n        }\n        else {\n            // Read\n            registerDependency(Observable); // The caller only needs to be notified of changes if they did a \"read\" operation\n            return Observable[observableLatestValue];\n        }\n    }\n    Observable[observableLatestValue] = initialValue;\n    // Inherit from 'subscribable'\n    if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n        extend(Observable, subscribable.fn);\n    }\n    subscribable.fn.init(Observable);\n    // Inherit from 'observable'\n    setPrototypeOfOrExtend(Observable, observable.fn);\n    if (options.deferUpdates) {\n        deferUpdates(Observable);\n    }\n    return Observable;\n}\n// Define prototype for observables\nobservable.fn = {\n    equalityComparer: valuesArePrimitiveAndEqual,\n    peek: function () { return this[observableLatestValue]; },\n    valueHasMutated: function () { this.notifySubscribers(this[observableLatestValue]); },\n    valueWillMutate: function () {\n        this.notifySubscribers(this[observableLatestValue], 'beforeChange');\n    },\n    then: function (res, rej) { try {\n        res(this());\n    }\n    catch (e) {\n        rej(e);\n    } }\n};\n// Moved out of \"limit\" to avoid the extra closure\nfunction limitNotifySubscribers(value, event) {\n    if (!event || event === defaultEvent) {\n        this._limitChange(value);\n    }\n    else if (event === 'beforeChange') {\n        this._limitBeforeChange(value);\n    }\n    else {\n        this._origNotifySubscribers(value, event);\n    }\n}\n// Add `limit` function to the subscribable prototype\nsubscribable.fn.limit = function limit(limitFunction) {\n    var self = this;\n    var selfIsObservable = isObservable(self);\n    var beforeChange = 'beforeChange';\n    var ignoreBeforeChange, previousValue, pendingValue;\n    if (!self._origNotifySubscribers) {\n        self._origNotifySubscribers = self.notifySubscribers;\n        self.notifySubscribers = limitNotifySubscribers;\n    }\n    var finish = limitFunction(function () {\n        self._notificationIsPending = false;\n        // If an observable provided a reference to itself, access it to get the latest value.\n        // This allows computed observables to delay calculating their value until needed.\n        if (selfIsObservable && pendingValue === self) {\n            pendingValue = self();\n        }\n        ignoreBeforeChange = false;\n        if (self.isDifferent(previousValue, pendingValue)) {\n            self._origNotifySubscribers(previousValue = pendingValue);\n        }\n    });\n    self._limitChange = function (value) {\n        self._notificationIsPending = ignoreBeforeChange = true;\n        pendingValue = value;\n        finish();\n    };\n    self._limitBeforeChange = function (value) {\n        if (!ignoreBeforeChange) {\n            previousValue = value;\n            self._origNotifySubscribers(value, beforeChange);\n        }\n    };\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the observable constructor\nif (canSetPrototype) {\n    setPrototypeOf(observable.fn, subscribable.fn);\n}\nvar protoProperty = observable.protoProperty = options.protoProperty;\nobservable.fn[protoProperty] = observable;\nfunction isObservable(instance) {\n    return hasPrototype(instance, observable);\n}\nfunction unwrap(value) {\n    return isObservable(value) ? value() : value;\n}\nfunction peek(value) {\n    return isObservable(value) ? value.peek() : value;\n}\nfunction isWriteableObservable(instance) {\n    // Observable\n    if ((typeof instance === 'function') && instance[protoProperty] === observable) {\n        return true;\n    }\n    // Writeable dependent observable\n    if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {\n        return true;\n    }\n    // Anything else\n    return false;\n}\n\n//\n// Observable Array - Change Tracking Extender\n// ---\n//\n/* eslint no-fallthrough: 0*/\nvar arrayChangeEventName = 'arrayChange';\nfunction trackArrayChanges(target, options$$1) {\n    // Use the provided options--each call to trackArrayChanges overwrites the previously set options\n    target.compareArrayOptions = {};\n    if (options$$1 && typeof options$$1 == \"object\") {\n        extend(target.compareArrayOptions, options$$1);\n    }\n    target.compareArrayOptions.sparse = true;\n    // Only modify the target observable once\n    if (target.cacheDiffForKnownOperation) {\n        return;\n    }\n    var trackingChanges = false, cachedDiff = null, arrayChangeSubscription, pendingNotifications = 0, underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd, underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;\n    // Watch \"subscribe\" calls, and for array change events, ensure change tracking is enabled\n    target.beforeSubscriptionAdd = function (event) {\n        if (underlyingBeforeSubscriptionAddFunction)\n            underlyingBeforeSubscriptionAddFunction.call(target, event);\n        if (event === arrayChangeEventName) {\n            trackChanges();\n        }\n    };\n    // Watch \"dispose\" calls, and for array change events, ensure change tracking is disabled when all are disposed\n    target.afterSubscriptionRemove = function (event) {\n        if (underlyingAfterSubscriptionRemoveFunction)\n            underlyingAfterSubscriptionRemoveFunction.call(target, event);\n        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n            if (arrayChangeSubscription) {\n                arrayChangeSubscription.dispose();\n            }\n            arrayChangeSubscription = null;\n            trackingChanges = false;\n        }\n    };\n    function trackChanges() {\n        // Calling 'trackChanges' multiple times is the same as calling it once\n        if (trackingChanges) {\n            return;\n        }\n        trackingChanges = true;\n        // Intercept \"notifySubscribers\" to track how many times it was called.\n        var underlyingNotifySubscribersFunction = target['notifySubscribers'];\n        target['notifySubscribers'] = function (valueToNotify, event) {\n            if (!event || event === defaultEvent) {\n                ++pendingNotifications;\n            }\n            return underlyingNotifySubscribersFunction.apply(this, arguments);\n        };\n        // Each time the array changes value, capture a clone so that on the next\n        // change it's possible to produce a diff\n        var previousContents = [].concat(target.peek() || []);\n        cachedDiff = null;\n        arrayChangeSubscription = target.subscribe(function (currentContents) {\n            // Make a copy of the current contents and ensure it's an array\n            currentContents = [].concat(currentContents || []);\n            // Compute the diff and issue notifications, but only if someone is listening\n            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n                var changes = getChanges(previousContents, currentContents);\n            }\n            // Eliminate references to the old, removed items, so they can be GCed\n            previousContents = currentContents;\n            cachedDiff = null;\n            pendingNotifications = 0;\n            if (changes && changes.length) {\n                target['notifySubscribers'](changes, arrayChangeEventName);\n            }\n        });\n    }\n    function getChanges(previousContents, currentContents) {\n        // We try to re-use cached diffs.\n        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates\n        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,\n        // notifications are issued immediately so we wouldn't be queueing up more than one.\n        if (!cachedDiff || pendingNotifications > 1) {\n            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);\n        }\n        return cachedDiff;\n    }\n    target.cacheDiffForKnownOperation = function (rawArray, operationName, args) {\n        var index, argsIndex;\n        // Only run if we're currently tracking changes for this observable array\n        // and there aren't any pending deferred notifications.\n        if (!trackingChanges || pendingNotifications) {\n            return;\n        }\n        var diff = [], arrayLength = rawArray.length, argsLength = args.length, offset = 0;\n        function pushDiff(status, value, index) {\n            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };\n        }\n        switch (operationName) {\n            case 'push':\n                offset = arrayLength;\n            case 'unshift':\n                for (index = 0; index < argsLength; index++) {\n                    pushDiff('added', args[index], offset + index);\n                }\n                break;\n            case 'pop':\n                offset = arrayLength - 1;\n            case 'shift':\n                if (arrayLength) {\n                    pushDiff('deleted', rawArray[offset], offset);\n                }\n                break;\n            case 'splice':\n                // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].\n                // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice\n                var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength), endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength), endAddIndex = startIndex + argsLength - 2, endIndex = Math.max(endDeleteIndex, endAddIndex), additions = [], deletions = [];\n                for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {\n                    if (index < endDeleteIndex)\n                        deletions.push(pushDiff('deleted', rawArray[index], index));\n                    if (index < endAddIndex)\n                        additions.push(pushDiff('added', args[argsIndex], index));\n                }\n                findMovesInArrayComparison(deletions, additions);\n                break;\n            default:\n                return;\n        }\n        cachedDiff = diff;\n    };\n}\n// Expose compareArrays for testing.\ntrackArrayChanges.compareArrays = compareArrays;\n// Add the trackArrayChanges extender so we can use\n// obs.extend({ trackArrayChanges: true })\nextenders.trackArrayChanges = trackArrayChanges;\n\n//\n// Observable Arrays\n// ===\n//\nfunction observableArray(initialValues) {\n    initialValues = initialValues || [];\n    if (typeof initialValues !== 'object' || !('length' in initialValues)) {\n        throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.');\n    }\n    var result = observable(initialValues);\n    setPrototypeOfOrExtend(result, observableArray.fn);\n    trackArrayChanges(result);\n    // ^== result.extend({ trackArrayChanges: true })\n    return result;\n}\nobservableArray.fn = {\n    remove: function (valueOrPredicate) {\n        var underlyingArray = this.peek();\n        var removedValues = [];\n        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\n        for (var i = 0; i < underlyingArray.length; i++) {\n            var value = underlyingArray[i];\n            if (predicate(value)) {\n                if (removedValues.length === 0) {\n                    this.valueWillMutate();\n                }\n                removedValues.push(value);\n                underlyingArray.splice(i, 1);\n                i--;\n            }\n        }\n        if (removedValues.length) {\n            this.valueHasMutated();\n        }\n        return removedValues;\n    },\n    removeAll: function (arrayOfValues) {\n        // If you passed zero args, we remove everything\n        if (arrayOfValues === undefined) {\n            var underlyingArray = this.peek();\n            var allValues = underlyingArray.slice(0);\n            this.valueWillMutate();\n            underlyingArray.splice(0, underlyingArray.length);\n            this.valueHasMutated();\n            return allValues;\n        }\n        // If you passed an arg, we interpret it as an array of entries to remove\n        if (!arrayOfValues) {\n            return [];\n        }\n        return this['remove'](function (value) {\n            return arrayIndexOf(arrayOfValues, value) >= 0;\n        });\n    },\n    destroy: function (valueOrPredicate) {\n        var underlyingArray = this.peek();\n        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\n        this.valueWillMutate();\n        for (var i = underlyingArray.length - 1; i >= 0; i--) {\n            var value = underlyingArray[i];\n            if (predicate(value)) {\n                underlyingArray[i]['_destroy'] = true;\n            }\n        }\n        this.valueHasMutated();\n    },\n    destroyAll: function (arrayOfValues) {\n        // If you passed zero args, we destroy everything\n        if (arrayOfValues === undefined) {\n            return this.destroy(function () { return true; });\n        }\n        // If you passed an arg, we interpret it as an array of entries to destroy\n        if (!arrayOfValues) {\n            return [];\n        }\n        return this.destroy(function (value) {\n            return arrayIndexOf(arrayOfValues, value) >= 0;\n        });\n    },\n    indexOf: function (item) {\n        var underlyingArray = this();\n        return arrayIndexOf(underlyingArray, item);\n    },\n    replace: function (oldItem, newItem) {\n        var index = this.indexOf(oldItem);\n        if (index >= 0) {\n            this.valueWillMutate();\n            this.peek()[index] = newItem;\n            this.valueHasMutated();\n        }\n    }\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.observableArray constructor\nif (canSetPrototype) {\n    setPrototypeOf(observableArray.fn, observable.fn);\n}\n// Populate ko.observableArray.fn with read/write functions from native arrays\n// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array\n// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale\narrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {\n    observableArray.fn[methodName] = function () {\n        // Use \"peek\" to avoid creating a subscription in any computed that we're executing in the context of\n        // (for consistency with mutating regular observables)\n        var underlyingArray = this.peek();\n        this.valueWillMutate();\n        this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);\n        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);\n        this.valueHasMutated();\n        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.\n        return methodCallResult === underlyingArray ? this : methodCallResult;\n    };\n});\n// Populate ko.observableArray.fn with read-only functions from native arrays\narrayForEach(['slice'], function (methodName) {\n    observableArray.fn[methodName] = function () {\n        var underlyingArray = this();\n        return underlyingArray[methodName].apply(underlyingArray, arguments);\n    };\n});\n\n//\n// Helpers\n// ---\n// toJS & toJSON\n//\nvar maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)\nfunction toJS(rootObject) {\n    if (arguments.length == 0)\n        throw new Error(\"When calling ko.toJS, pass the object you want to convert.\");\n    // We just unwrap everything at every level in the object graph\n    return mapJsObjectGraph(rootObject, function (valueToMap) {\n        // Loop because an observable's value might in turn be another observable wrapper\n        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)\n            valueToMap = valueToMap();\n        return valueToMap;\n    });\n}\nfunction toJSON(rootObject, replacer, space) {\n    var plainJavaScriptObject = toJS(rootObject);\n    return stringifyJson(plainJavaScriptObject, replacer, space);\n}\nfunction mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {\n    visitedObjects = visitedObjects || new objectLookup();\n    rootObject = mapInputCallback(rootObject);\n    var canHaveProperties = (typeof rootObject == \"object\") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));\n    if (!canHaveProperties)\n        return rootObject;\n    var outputProperties = rootObject instanceof Array ? [] : {};\n    visitedObjects.save(rootObject, outputProperties);\n    visitPropertiesOrArrayEntries(rootObject, function (indexer) {\n        var propertyValue = mapInputCallback(rootObject[indexer]);\n        switch (typeof propertyValue) {\n            case \"boolean\":\n            case \"number\":\n            case \"string\":\n            case \"function\":\n                outputProperties[indexer] = propertyValue;\n                break;\n            case \"object\":\n            case \"undefined\":\n                var previouslyMappedValue = visitedObjects.get(propertyValue);\n                outputProperties[indexer] = (previouslyMappedValue !== undefined)\n                    ? previouslyMappedValue\n                    : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);\n                break;\n        }\n    });\n    return outputProperties;\n}\nfunction visitPropertiesOrArrayEntries(rootObject, visitorCallback) {\n    if (rootObject instanceof Array) {\n        for (var i = 0; i < rootObject.length; i++)\n            visitorCallback(i);\n        // For arrays, also respect toJSON property for custom mappings (fixes #278)\n        if (typeof rootObject['toJSON'] == 'function')\n            visitorCallback('toJSON');\n    }\n    else {\n        for (var propertyName in rootObject) {\n            visitorCallback(propertyName);\n        }\n    }\n}\nfunction objectLookup() {\n    this.keys = [];\n    this.values = [];\n}\nobjectLookup.prototype = {\n    constructor: objectLookup,\n    save: function (key, value) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        if (existingIndex >= 0)\n            this.values[existingIndex] = value;\n        else {\n            this.keys.push(key);\n            this.values.push(value);\n        }\n    },\n    get: function (key) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;\n    }\n};\n\n//\n// Observables.\n// ---\n//\n// The following are added to the root `[t]ko` object.\n//\n\nexport { dependencyDetection, observable, isObservable, unwrap, peek, isWriteableObservable, isWriteableObservable as isWritableObservable, isSubscribable, subscribable, observableArray, trackArrayChanges, arrayChangeEventName, toJS, toJSON, deferUpdates, valuesArePrimitiveAndEqual, applyExtenders, extenders };\n//# sourceMappingURL=tko.observable.js.map\n","import { addDisposeCallback, arrayForEach, canSetPrototype, createSymbolOrString, domNodeIsAttachedToDocument, extend, hasPrototype, objectForEach, options, removeDisposeCallback, safeSetTimeout, setPrototypeOf, setPrototypeOfOrExtend } from 'tko.utils';\nimport { dependencyDetection, extenders, observable, subscribable, valuesArePrimitiveAndEqual } from 'tko.observable';\n\n//\n// Computed Observable Values\n//\n// (before tko, `computed` was also known as `dependentObservable`)\n//\nvar computedState = createSymbolOrString('_state');\nfunction computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {\n    if (typeof evaluatorFunctionOrOptions === 'object') {\n        // Single-parameter syntax - everything is on this \"options\" param\n        options$$1 = evaluatorFunctionOrOptions;\n    }\n    else {\n        // Multi-parameter syntax - construct the options according to the params passed\n        options$$1 = options$$1 || {};\n        if (evaluatorFunctionOrOptions) {\n            options$$1.read = evaluatorFunctionOrOptions;\n        }\n    }\n    if (typeof options$$1.read !== 'function') {\n        throw Error('Pass a function that returns the value of the computed');\n    }\n    var writeFunction = options$$1.write;\n    var state = {\n        latestValue: undefined,\n        isStale: true,\n        isBeingEvaluated: false,\n        suppressDisposalUntilDisposeWhenReturnsFalse: false,\n        isDisposed: false,\n        pure: false,\n        isSleeping: false,\n        readFunction: options$$1.read,\n        evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,\n        disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,\n        disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,\n        domNodeDisposalCallback: null,\n        dependencyTracking: {},\n        dependenciesCount: 0,\n        evaluationTimeoutInstance: null\n    };\n    function computedObservable() {\n        if (arguments.length > 0) {\n            if (typeof writeFunction === 'function') {\n                // Writing a value\n                writeFunction.apply(state.evaluatorFunctionTarget, arguments);\n            }\n            else {\n                throw new Error(\"Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.\");\n            }\n            return this; // Permits chained assignments\n        }\n        else {\n            // Reading the value\n            dependencyDetection.registerDependency(computedObservable);\n            if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {\n                computedObservable.evaluateImmediate();\n            }\n            return state.latestValue;\n        }\n    }\n    computedObservable[computedState] = state;\n    computedObservable.hasWriteFunction = typeof writeFunction === 'function';\n    // Inherit from 'subscribable'\n    if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n        extend(computedObservable, subscribable.fn);\n    }\n    subscribable.fn.init(computedObservable);\n    // Inherit from 'computed'\n    setPrototypeOfOrExtend(computedObservable, computed.fn);\n    if (options$$1.pure) {\n        state.pure = true;\n        state.isSleeping = true; // Starts off sleeping; will awake on the first subscription\n        extend(computedObservable, pureComputedOverrides);\n    }\n    else if (options$$1.deferEvaluation) {\n        extend(computedObservable, deferEvaluationOverrides);\n    }\n    if (options.deferUpdates) {\n        extenders.deferred(computedObservable, true);\n    }\n    if (options.debug) {\n        // #1731 - Aid debugging by exposing the computed's options\n        computedObservable._options = options$$1;\n    }\n    if (state.disposeWhenNodeIsRemoved) {\n        // Since this computed is associated with a DOM node, and we don't want to dispose the computed\n        // until the DOM node is *removed* from the document (as opposed to never having been in the document),\n        // we'll prevent disposal until \"disposeWhen\" first returns false.\n        state.suppressDisposalUntilDisposeWhenReturnsFalse = true;\n        // disposeWhenNodeIsRemoved: true can be used to opt into the \"only dispose after first false result\"\n        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try\n        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't\n        // be documented or used by application code, as it's likely to change in a future version of KO.\n        if (!state.disposeWhenNodeIsRemoved.nodeType) {\n            state.disposeWhenNodeIsRemoved = null;\n        }\n    }\n    // Evaluate, unless sleeping or deferEvaluation is true\n    if (!state.isSleeping && !options$$1.deferEvaluation) {\n        computedObservable.evaluateImmediate();\n    }\n    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is\n    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).\n    if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {\n        addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {\n            computedObservable.dispose();\n        });\n    }\n    return computedObservable;\n}\n// Utility function that disposes a given dependencyTracking entry\nfunction computedDisposeDependencyCallback(id, entryToDispose) {\n    if (entryToDispose !== null && entryToDispose.dispose) {\n        entryToDispose.dispose();\n    }\n}\n// This function gets called each time a dependency is detected while evaluating a computed.\n// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.\nfunction computedBeginDependencyDetectionCallback(subscribable$$1, id) {\n    var computedObservable = this.computedObservable, state = computedObservable[computedState];\n    if (!state.isDisposed) {\n        if (this.disposalCount && this.disposalCandidates[id]) {\n            // Don't want to dispose this subscription, as it's still being used\n            computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);\n            this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway\n            --this.disposalCount;\n        }\n        else if (!state.dependencyTracking[id]) {\n            // Brand new subscription - add it\n            computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));\n        }\n    }\n}\ncomputed.fn = {\n    equalityComparer: valuesArePrimitiveAndEqual,\n    getDependenciesCount: function () {\n        return this[computedState].dependenciesCount;\n    },\n    addDependencyTracking: function (id, target, trackingObj) {\n        if (this[computedState].pure && target === this) {\n            throw Error(\"A 'pure' computed must not be called recursively\");\n        }\n        this[computedState].dependencyTracking[id] = trackingObj;\n        trackingObj._order = this[computedState].dependenciesCount++;\n        trackingObj._version = target.getVersion();\n    },\n    haveDependenciesChanged: function () {\n        var id, dependency, dependencyTracking = this[computedState].dependencyTracking;\n        for (id in dependencyTracking) {\n            if (dependencyTracking.hasOwnProperty(id)) {\n                dependency = dependencyTracking[id];\n                if (dependency._target.hasChanged(dependency._version)) {\n                    return true;\n                }\n            }\n        }\n    },\n    markDirty: function () {\n        // Process \"dirty\" events if we can handle delayed notifications\n        if (this._evalDelayed && !this[computedState].isBeingEvaluated) {\n            this._evalDelayed();\n        }\n    },\n    isActive: function () {\n        return this[computedState].isStale || this[computedState].dependenciesCount > 0;\n    },\n    respondToChange: function () {\n        // Ignore \"change\" events if we've already scheduled a delayed notification\n        if (!this._notificationIsPending) {\n            this.evaluatePossiblyAsync();\n        }\n    },\n    subscribeToDependency: function (target) {\n        if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {\n            var dirtySub = target.subscribe(this.markDirty, this, 'dirty'), changeSub = target.subscribe(this.respondToChange, this);\n            return {\n                _target: target,\n                dispose: function () {\n                    dirtySub.dispose();\n                    changeSub.dispose();\n                }\n            };\n        }\n        else {\n            return target.subscribe(this.evaluatePossiblyAsync, this);\n        }\n    },\n    evaluatePossiblyAsync: function () {\n        var computedObservable = this, throttleEvaluationTimeout = computedObservable.throttleEvaluation;\n        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {\n            clearTimeout(this[computedState].evaluationTimeoutInstance);\n            this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {\n                computedObservable.evaluateImmediate(true /* notifyChange */);\n            }, throttleEvaluationTimeout);\n        }\n        else if (computedObservable._evalDelayed) {\n            computedObservable._evalDelayed();\n        }\n        else {\n            computedObservable.evaluateImmediate(true /* notifyChange */);\n        }\n    },\n    evaluateImmediate: function (notifyChange) {\n        var computedObservable = this, state = computedObservable[computedState], disposeWhen = state.disposeWhen;\n        if (state.isBeingEvaluated) {\n            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.\n            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost\n            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing\n            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387\n            return;\n        }\n        // Do not evaluate (and possibly capture new dependencies) if disposed\n        if (state.isDisposed) {\n            return;\n        }\n        if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {\n            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse\n            if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {\n                computedObservable.dispose();\n                return;\n            }\n        }\n        else {\n            // It just did return false, so we can stop suppressing now\n            state.suppressDisposalUntilDisposeWhenReturnsFalse = false;\n        }\n        state.isBeingEvaluated = true;\n        try {\n            this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);\n        }\n        finally {\n            state.isBeingEvaluated = false;\n        }\n        if (!state.dependenciesCount) {\n            computedObservable.dispose();\n        }\n    },\n    evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {\n        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.\n        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,\n        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).\n        var computedObservable = this, state = computedObservable[computedState];\n        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).\n        // Then, during evaluation, we cross off any that are in fact still being used.\n        var isInitial = state.pure ? undefined : !state.dependenciesCount, // If we're evaluating when there are no previous dependencies, it must be the first time\n        dependencyDetectionContext = {\n            computedObservable: computedObservable,\n            disposalCandidates: state.dependencyTracking,\n            disposalCount: state.dependenciesCount\n        };\n        dependencyDetection.begin({\n            callbackTarget: dependencyDetectionContext,\n            callback: computedBeginDependencyDetectionCallback,\n            computed: computedObservable,\n            isInitial: isInitial\n        });\n        state.dependencyTracking = {};\n        state.dependenciesCount = 0;\n        var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);\n        if (computedObservable.isDifferent(state.latestValue, newValue)) {\n            if (!state.isSleeping) {\n                computedObservable.notifySubscribers(state.latestValue, 'beforeChange');\n            }\n            state.latestValue = newValue;\n            if (state.isSleeping) {\n                computedObservable.updateVersion();\n            }\n            else if (notifyChange) {\n                computedObservable.notifySubscribers(state.latestValue);\n            }\n        }\n        if (isInitial) {\n            computedObservable.notifySubscribers(state.latestValue, 'awake');\n        }\n    },\n    evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {\n        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.\n        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection\n        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU\n        // overhead of computed evaluation (on V8 at least).\n        try {\n            var readFunction = state.readFunction;\n            return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();\n        }\n        finally {\n            dependencyDetection.end();\n            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it\n            if (dependencyDetectionContext.disposalCount && !state.isSleeping) {\n                objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);\n            }\n            state.isStale = false;\n        }\n    },\n    peek: function () {\n        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when \"deferEvaluation\" is set.\n        var state = this[computedState];\n        if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {\n            this.evaluateImmediate();\n        }\n        return state.latestValue;\n    },\n    limit: function (limitFunction) {\n        // Override the limit function with one that delays evaluation as well\n        subscribable.fn.limit.call(this, limitFunction);\n        this._evalDelayed = function () {\n            this._limitBeforeChange(this[computedState].latestValue);\n            this[computedState].isStale = true; // Mark as dirty\n            // Pass the observable to the \"limit\" code, which will access it when\n            // it's time to do the notification.\n            this._limitChange(this);\n        };\n    },\n    dispose: function () {\n        var state = this[computedState];\n        if (!state.isSleeping && state.dependencyTracking) {\n            objectForEach(state.dependencyTracking, function (id, dependency) {\n                if (dependency.dispose) {\n                    dependency.dispose();\n                }\n            });\n        }\n        if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {\n            removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);\n        }\n        state.dependencyTracking = null;\n        state.dependenciesCount = 0;\n        state.isDisposed = true;\n        state.isStale = false;\n        state.isSleeping = false;\n        state.disposeWhenNodeIsRemoved = null;\n        state.readFunction = null;\n        if (options.debug) {\n            this._options = null;\n        }\n    }\n};\nvar pureComputedOverrides = {\n    beforeSubscriptionAdd: function (event) {\n        // If asleep, wake up the computed by subscribing to any dependencies.\n        var computedObservable = this, state = computedObservable[computedState];\n        if (!state.isDisposed && state.isSleeping && event == 'change') {\n            state.isSleeping = false;\n            if (state.isStale || computedObservable.haveDependenciesChanged()) {\n                state.dependencyTracking = null;\n                state.dependenciesCount = 0;\n                state.isStale = true;\n                computedObservable.evaluateImmediate();\n            }\n            else {\n                // First put the dependencies in order\n                var dependeciesOrder = [];\n                objectForEach(state.dependencyTracking, function (id, dependency) {\n                    dependeciesOrder[dependency._order] = id;\n                });\n                // Next, subscribe to each one\n                arrayForEach(dependeciesOrder, function (id, order) {\n                    var dependency = state.dependencyTracking[id], subscription = computedObservable.subscribeToDependency(dependency._target);\n                    subscription._order = order;\n                    subscription._version = dependency._version;\n                    state.dependencyTracking[id] = subscription;\n                });\n            }\n            if (!state.isDisposed) {\n                computedObservable.notifySubscribers(state.latestValue, 'awake');\n            }\n        }\n    },\n    afterSubscriptionRemove: function (event) {\n        var state = this[computedState];\n        if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {\n            objectForEach(state.dependencyTracking, function (id, dependency) {\n                if (dependency.dispose) {\n                    state.dependencyTracking[id] = {\n                        _target: dependency._target,\n                        _order: dependency._order,\n                        _version: dependency._version\n                    };\n                    dependency.dispose();\n                }\n            });\n            state.isSleeping = true;\n            this.notifySubscribers(undefined, 'asleep');\n        }\n    },\n    getVersion: function () {\n        // Because a pure computed is not automatically updated while it is sleeping, we can't\n        // simply return the version number. Instead, we check if any of the dependencies have\n        // changed and conditionally re-evaluate the computed observable.\n        var state = this[computedState];\n        if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {\n            this.evaluateImmediate();\n        }\n        return subscribable.fn.getVersion.call(this);\n    }\n};\nvar deferEvaluationOverrides = {\n    beforeSubscriptionAdd: function (event) {\n        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.\n        if (event == 'change' || event == 'beforeChange') {\n            this.peek();\n        }\n    }\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.computed constructor\nif (canSetPrototype) {\n    setPrototypeOf(computed.fn, subscribable.fn);\n}\n// Set the proto chain values for ko.hasPrototype\nvar protoProp = observable.protoProperty; // == \"__ko_proto__\"\ncomputed[protoProp] = observable;\ncomputed.fn[protoProp] = computed;\nfunction isComputed(instance) {\n    return hasPrototype(instance, computed);\n}\nfunction isPureComputed(instance) {\n    return hasPrototype(instance, computed)\n        && instance[computedState] && instance[computedState].pure;\n}\nfunction pureComputed(evaluatorFunctionOrOptions, evaluatorFunctionTarget) {\n    if (typeof evaluatorFunctionOrOptions === 'function') {\n        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, { 'pure': true });\n    }\n    else {\n        evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions); // make a copy of the parameter object\n        evaluatorFunctionOrOptions.pure = true;\n        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget);\n    }\n}\n\nfunction throttleExtender(target, timeout) {\n    // Throttling means two things:\n    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies\n    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate\n    target.throttleEvaluation = timeout;\n    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*\n    //     so the target cannot change value synchronously or faster than a certain rate\n    var writeTimeoutInstance = null;\n    return computed({\n        read: target,\n        write: function (value) {\n            clearTimeout(writeTimeoutInstance);\n            writeTimeoutInstance = setTimeout(function () {\n                target(value);\n            }, timeout);\n        }\n    });\n}\nextenders.throttle = throttleExtender;\n\n//\n// tko.computed - Exports\n//\n// knockout -> tko changes:\n//      Deprecates `dependentObservable` (use `computed`)\n//\n\nexport { computed, isComputed, isPureComputed, pureComputed, throttleExtender };\n//# sourceMappingURL=tko.computed.js.map\n","import { clonePlainObjectDeep, extend, objectForEach, options, stringTrim } from 'tko.utils';\nimport { isObservable, isWriteableObservable, unwrap } from 'tko.observable';\n\nfunction LAMBDA() { }\n/**\n * @ operator - recursively call the identifier if it's a function\n * @param  {operand} a ignored\n * @param  {operand} b The variable to be called (if a function) and unwrapped\n * @return {value}   The result.\n */\nfunction unwrapOrCall(a, b) {\n    while (typeof b === 'function') {\n        b = b();\n    }\n    return b;\n}\nvar operators = {\n    // unary\n    '@': unwrapOrCall,\n    '#': function (a, b) { return function () { return unwrap(b); }; },\n    '=>': LAMBDA,\n    '!': function not(a, b) { return !b; },\n    '!!': function notnot(a, b) { return !!b; },\n    '++': function preinc(a, b) { return ++b; },\n    '--': function preinc(a, b) { return --b; },\n    // mul/div\n    '*': function mul(a, b) { return a * b; },\n    '/': function div(a, b) { return a / b; },\n    '%': function mod(a, b) { return a % b; },\n    // sub/add\n    '+': function add(a, b) { return a + b; },\n    '-': function sub(a, b) { return (a || 0) - (b || 0); },\n    '&-': function neg(a, b) { return -1 * b; },\n    // relational\n    '<': function lt(a, b) { return a < b; },\n    '<=': function le(a, b) { return a <= b; },\n    '>': function gt(a, b) { return a > b; },\n    '>=': function ge(a, b) { return a >= b; },\n    //    TODO: 'in': function (a, b) { return a in b; },\n    //    TODO: 'instanceof': function (a, b) { return a instanceof b; },\n    // equality\n    '==': function equal(a, b) { return a === b; },\n    '!=': function ne(a, b) { return a !== b; },\n    '===': function sequal(a, b) { return a === b; },\n    '!==': function sne(a, b) { return a !== b; },\n    // bitwise\n    '&': function bitAnd(a, b) { return a & b; },\n    '^': function xor(a, b) { return a ^ b; },\n    '|': function bitOr(a, b) { return a | b; },\n    // logic\n    '&&': function logicAnd(a, b) { return a && b; },\n    '||': function logicOr(a, b) { return a || b; },\n    // Access\n    '.': function member(a, b) { return a[b]; },\n    '[': function member(a, b) { return a[b]; },\n    // conditional/ternary\n    // '?': ternary See Node.js\n    // Function-Call\n    'call': function callOp(a, b) { return a.apply(null, b); }\n};\n/* Order of precedence from:\nhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table\n*/\n// Our operator - unwrap/call\noperators['@'].precedence = 21;\noperators['#'].precedence = 21;\n// lambda\noperators['=>'].precedence = 20;\n// Member\noperators['.'].precedence = 19;\noperators['['].precedence = 19;\n// Logical not\noperators['!'].precedence = 16;\noperators['!!'].precedence = 16; // explicit double-negative\n// Prefix inc/dec\noperators['++'].precedence = 16;\noperators['--'].precedence = 16;\noperators['&-'].precedence = 16;\n// mul/div/remainder\noperators['%'].precedence = 14;\noperators['*'].precedence = 14;\noperators['/'].precedence = 14;\n// add/sub\noperators['+'].precedence = 13;\noperators['-'].precedence = 13;\n// bitwise\noperators['|'].precedence = 12;\noperators['^'].precedence = 11;\noperators['&'].precedence = 10;\n// comparison\noperators['<'].precedence = 11;\noperators['<='].precedence = 11;\noperators['>'].precedence = 11;\noperators['>='].precedence = 11;\n// operators['in'].precedence = 8;\n// operators['instanceof'].precedence = 8;\n// equality\noperators['=='].precedence = 10;\noperators['!='].precedence = 10;\noperators['==='].precedence = 10;\noperators['!=='].precedence = 10;\n// logic\noperators['&&'].precedence = 6;\noperators['||'].precedence = 5;\noperators['&&'].earlyOut = function (a) { return !a; };\noperators['||'].earlyOut = function (a) { return a; };\n// Call a function\noperators['call'].precedence = 1;\n\nvar IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');\nvar Node = /** @class */ (function () {\n    function Node(lhs, op, rhs) {\n        this.lhs = lhs;\n        this.op = op;\n        this.rhs = rhs;\n    }\n    Object.defineProperty(Node, \"operators\", {\n        get: function () { return operators; },\n        enumerable: true,\n        configurable: true\n    });\n    Node.prototype.get_leaf_value = function (leaf, context, globals, node) {\n        if (typeof leaf === 'function') {\n            // Expressions on observables are nonsensical, so we unwrap any\n            // function values (e.g. identifiers).\n            return unwrap(leaf());\n        }\n        // primitives\n        if (typeof leaf !== 'object' || leaf === null) {\n            return leaf;\n        }\n        // Identifiers and Expressions\n        if (leaf[Node.isExpressionOrIdentifierSymbol]) {\n            // lhs is passed in as the parent of the leaf. It will be defined in\n            // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.\n            return unwrap(leaf.get_value(undefined, context, globals, node));\n        }\n        // Plain object/class.\n        return leaf;\n    };\n    /**\n     * Return a function that calculates and returns an expression's value\n     * when called.\n     * @param  {array} ops  The operations to perform\n     * @return {function}   The function that calculates the expression.\n     *\n     * Note that for a lambda, we do not evaluate the RHS expression until\n     * the lambda is called.\n     */\n    Node.prototype.get_value = function (notused, context, globals, node) {\n        var node = this;\n        if (node.op === LAMBDA) {\n            return function () { return node.get_leaf_value(node.rhs, context, globals, node); };\n        }\n        var lhv = node.get_leaf_value(node.lhs, context, globals, node);\n        var earlyOut = node.op.earlyOut;\n        if (earlyOut && earlyOut(lhv)) {\n            return lhv;\n        }\n        var rhv = node.get_leaf_value(node.rhs, context, globals, node);\n        return node.op(lhv, rhv, context, globals);\n    };\n    Object.defineProperty(Node, \"isExpressionOrIdentifierSymbol\", {\n        //\n        // Class variables.\n        //\n        get: function () { return IS_EXPR_OR_IDENT; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(Node.prototype, IS_EXPR_OR_IDENT, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Node.value_of = function (item, context, globals, node) {\n        if (item && item[Node.isExpressionOrIdentifierSymbol]) {\n            return item.get_value(item, context, globals, node);\n        }\n        return item;\n    };\n    /**\n    *  Convert an array of nodes to an executable tree.\n    *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding\n    *                      to the left hand side, right hand side, and\n    *                      operation function.\n    */\n    Node.create_root = function (nodes) {\n        var root, leaf, op, value;\n        // Prime the leaf = root node.\n        leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());\n        while (true) {\n            op = nodes.shift();\n            value = nodes.shift();\n            if (!op) {\n                break;\n            }\n            if (op.precedence < root.op.precedence) {\n                // rebase\n                root = new Node(root, op, value);\n                leaf = root;\n            }\n            else {\n                leaf.rhs = new Node(leaf.rhs, op, value);\n                leaf = leaf.rhs;\n            }\n        }\n        // console.log('tree', root)\n        return root;\n    };\n    return Node;\n}());\n/**\n * Because of cyclical dependencies on operators <-> Node <-> value_of,\n * we need to patch this in here.\n */\noperators['?'] = function ternary(a, b, context, globals, node) {\n    return Node.value_of(a ? b.yes : b.no, context, globals, node);\n};\noperators['?'].precedence = 4;\n\nvar Expression = /** @class */ (function () {\n    function Expression(nodes) {\n        this.nodes = nodes;\n        this.root = Node.create_root(nodes);\n    }\n    /**\n     * Return the value of `this` Expression instance.\n     */\n    Expression.prototype.get_value = function (parent, context, globals, node) {\n        if (!this.root) {\n            this.root = Node.create_root(this.nodes);\n        }\n        return this.root.get_value(parent, context, globals, node);\n    };\n    return Expression;\n}());\nExpression.prototype[Node.isExpressionOrIdentifierSymbol] = true;\n\nvar Arguments = /** @class */ (function () {\n    function Arguments(parser, args) {\n        this.parser = parser;\n        this.args = args;\n    }\n    Arguments.prototype.get_value = function (parent, context, globals, node) {\n        var deReffedArgs = [];\n        for (var i = 0, j = this.args.length; i < j; ++i) {\n            deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));\n        }\n        return deReffedArgs;\n    };\n    \n    Object.defineProperty(Arguments.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Arguments;\n}());\n\n/**\n * The following regular expressions were generated by\n *  https://mathiasbynens.be/demo/javascript-identifier-regex\n */\nvar IDStart = /[\\$A-Z_a-z\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B4\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D5F-\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FD5\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7AD\\uA7B0-\\uA7B7\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB65\\uAB70-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]/;\nvar IDContinue = 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Identifier = /** @class */ (function () {\n    function Identifier(parser, token, dereferences) {\n        this.token = token;\n        this.dereferences = dereferences;\n        this.parser = parser;\n    }\n    /**\n     * Apply all () and [] functions on the identifier to the lhs value e.g.\n     * a()[3] has deref functions that are essentially this:\n     *     [_deref_call, _deref_this where this=3]\n     *\n     * @param  {mixed} value  Should be an object.\n     * @return {mixed}        The dereferenced value.\n     *\n     * [1] We want to bind any function that is a method of an object, but not\n     *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where\n     *     we're given `data-bind='binding: obj.x'` and x is a computed will\n     *     break the computed's `this` and it will stop working as expected.\n     *\n     *     The test `!last_value.hasOwnProperty(member)`\n     *     distinguishes between functions on the prototype chain (prototypal\n     *     members) and value-members added directly to the object.  This may\n     *     not be the canonical test for this relationship, but it succeeds\n     *     in the known test cases.\n     *\n     *     See: `this` tests of our dereference function.\n     */\n    Identifier.prototype.dereference = function (value, $context, globals, node) {\n        var member;\n        var refs = this.dereferences || [];\n        var $data = $context.$data || {};\n        var lastValue; // becomes `this` in function calls to object properties.\n        var i, n;\n        for (i = 0, n = refs.length; i < n; ++i) {\n            member = Node.value_of(refs[i], $context, globals, node);\n            if (typeof value === 'function' && refs[i] instanceof Arguments) {\n                // fn(args)\n                value = value.apply(lastValue || $data, member);\n                lastValue = value;\n            }\n            else {\n                // obj[x] or obj.x dereference.  Note that obj may be a function.\n                lastValue = value;\n                value = Node.value_of(value[member], $context, globals, node);\n            }\n        }\n        // [1] See note above.\n        if (typeof value === 'function' && n > 0 && lastValue !== value &&\n            !lastValue.hasOwnProperty(member)) {\n            return value.bind(lastValue);\n        }\n        return value;\n    };\n    \n    /**\n     * Return the value as one would get it from the top-level i.e.\n     * $data.token/$context.token/globals.token; this does not return intermediate\n     * values on a chain of members i.e. $data.hello.there -- requesting the\n     * Identifier('there').value will return $data/$context/globals.there.\n     *\n     * This will dereference using () or [arg] member.\n     * @param  {object | Identifier | Expression} parent\n     * @return {mixed}  Return the primitive or an accessor.\n     */\n    Identifier.prototype.get_value = function (parent, context, globals, node) {\n        var intermediate = parent && !(parent instanceof Identifier)\n            ? Node.value_of(parent, context, globals, node)[this.token]\n            : context.lookup(this.token, globals, node);\n        return this.dereference(intermediate, context, globals, node);\n    };\n    Identifier.prototype.assign = function (object, property, value) {\n        if (isWriteableObservable(object[property])) {\n            object[property](value);\n        }\n        else if (!isObservable(object[property])) {\n            object[property] = value;\n        }\n    };\n    \n    /**\n     * Set the value of the Identifier.\n     *\n     * @param {Mixed} new_value The value that Identifier is to be set to.\n     */\n    Identifier.prototype.set_value = function (new_value, $context, globals) {\n        var $data = $context.$data || {};\n        var refs = this.dereferences || [];\n        var leaf = this.token;\n        var i, n, root;\n        if (Object.hasOwnProperty.call($data, leaf)) {\n            root = $data;\n        }\n        else if (Object.hasOwnProperty.call($context, leaf)) {\n            root = $context;\n        }\n        else if (Object.hasOwnProperty.call(globals, leaf)) {\n            root = globals;\n        }\n        else {\n            throw new Error('Identifier::set_value -- ' +\n                \"The property '\" + leaf + \"' does not exist \" +\n                'on the $data, $context, or globals.');\n        }\n        // Degenerate case. {$data|$context|global}[leaf] = something;\n        n = refs.length;\n        if (n === 0) {\n            this.assign(root, leaf, new_value);\n            return;\n        }\n        // First dereference is {$data|$context|global}[token].\n        root = root[leaf];\n        // We cannot use this.dereference because that gives the leaf; to evoke\n        // the ES5 setter we have to call `obj[leaf] = new_value`\n        for (i = 0; i < n - 1; ++i) {\n            leaf = refs[i];\n            if (leaf instanceof Arguments) {\n                root = root();\n            }\n            else {\n                root = root[Node.value_of(leaf)];\n            }\n        }\n        // We indicate that a dereference is a function when it is `true`.\n        if (refs[i] === true) {\n            throw new Error('Cannot assign a value to a function.');\n        }\n        // Call the setter for the leaf.\n        if (refs[i]) {\n            this.assign(root, Node.value_of(refs[i]), new_value);\n        }\n    };\n    \n    /**\n     * Determine if a character is a valid item in an identifier.\n     * Note that we do not check whether the first item is a number, nor do we\n     * support unicode identifiers here.\n     *\n     * From:  http://stackoverflow.com/a/9337047\n     * @param  {String}  ch  The character\n     * @return {Boolean}     True if this is a valid identifier\n     */\n    // function is_identifier_char(ch) {\n    //   return (ch >= 'A' && ch <= 'Z') ||\n    //          (ch >= 'a' && ch <= 'z') ||\n    //          (ch >= '0' && ch <= 9) ||\n    //           ch === '_' || ch === '$';\n    // }\n    Identifier.is_valid_start_char = function (ch) {\n        return IDStart.test(ch);\n    };\n    Identifier.is_valid_continue_char = function (ch) {\n        return IDContinue.test(ch);\n    };\n    Object.defineProperty(Identifier.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Identifier;\n}());\n\nvar Ternary = /** @class */ (function () {\n    function Ternary(yes, no) {\n        Object.assign(this, { yes: yes, no: no });\n    }\n    Ternary.prototype.get_value = function () { return this; };\n    Object.defineProperty(Ternary.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Ternary;\n}());\n\n/**\n * Originally based on (public domain):\n * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js\n */\nvar escapee = {\n    \"'\": \"'\",\n    '\"': '\"',\n    '`': '`',\n    '\\\\': '\\\\',\n    '/': '/',\n    '$': '$',\n    b: '\\b',\n    f: '\\f',\n    n: '\\n',\n    r: '\\r',\n    t: '\\t'\n};\n/**\n * Construct a new Parser instance with new Parser(node, context)\n * @param {Node} node    The DOM element from which we parsed the\n *                         content.\n * @param {object} context The Knockout context.\n * @param {object} globals An object containing any desired globals.\n */\nvar Parser = /** @class */ (function () {\n    function Parser() {\n    }\n    Parser.prototype.white = function () {\n        var ch = this.ch;\n        while (ch && ch <= ' ') {\n            ch = this.next();\n        }\n        return this.comment(ch);\n    };\n    /**\n     * Slurp any C or C++ style comments\n     */\n    Parser.prototype.comment = function (ch) {\n        if (ch !== '/') {\n            return ch;\n        }\n        var p = this.at;\n        var second = this.lookahead();\n        if (second === '/') {\n            while (ch) {\n                ch = this.next();\n                if (ch === '\\n' || ch === '\\r') {\n                    break;\n                }\n            }\n            ch = this.next();\n        }\n        else if (second === '*') {\n            while (ch) {\n                ch = this.next();\n                if (ch === '*' && this.lookahead() === '/') {\n                    this.next();\n                    break;\n                }\n            }\n            if (!ch) {\n                this.error('Unclosed comment, starting at character ' + p);\n            }\n            this.next();\n            return this.white();\n        }\n        return ch;\n    };\n    \n    Parser.prototype.next = function (c) {\n        if (c && c !== this.ch) {\n            this.error(\"Expected '\" + c + \"' but got '\" + this.ch + \"'\");\n        }\n        this.ch = this.text.charAt(this.at);\n        this.at += 1;\n        return this.ch;\n    };\n    Parser.prototype.lookahead = function () {\n        return this.text[this.at];\n    };\n    Parser.prototype.error = function (m) {\n        if (m instanceof Error) {\n            throw m;\n        }\n        var _a = m.name ? [m.name, m.message] : [m, ''], name = _a[0], msg = _a[1];\n        var message = \"\\n\" + name + \" \" + msg + \" of\\n    \" + this.text + \"\\n\" + Array(this.at).join(' ') + '_/ 🔥 \\\\_\\n';\n        throw new Error(message);\n    };\n    Parser.prototype.name = function () {\n        // A name of a binding\n        var name = '';\n        var enclosedBy;\n        this.white();\n        var ch = this.ch;\n        if (ch === \"'\" || ch === '\"') {\n            enclosedBy = ch;\n            ch = this.next();\n        }\n        while (ch) {\n            if (enclosedBy && ch === enclosedBy) {\n                this.white();\n                ch = this.next();\n                if (ch !== ':' && ch !== ',') {\n                    this.error('Object name: ' + name + ' missing closing ' + enclosedBy);\n                }\n                return name;\n            }\n            else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {\n                return name;\n            }\n            name += ch;\n            ch = this.next();\n        }\n        return name;\n    };\n    Parser.prototype.number = function () {\n        var number;\n        var string = '';\n        var ch = this.ch;\n        if (ch === '-') {\n            string = '-';\n            ch = this.next('-');\n        }\n        while (ch >= '0' && ch <= '9') {\n            string += ch;\n            ch = this.next();\n        }\n        if (ch === '.') {\n            string += '.';\n            ch = this.next();\n            while (ch && ch >= '0' && ch <= '9') {\n                string += ch;\n                ch = this.next();\n            }\n        }\n        if (ch === 'e' || ch === 'E') {\n            string += ch;\n            ch = this.next();\n            if (ch === '-' || ch === '+') {\n                string += ch;\n                ch = this.next();\n            }\n            while (ch >= '0' && ch <= '9') {\n                string += ch;\n                ch = this.next();\n            }\n        }\n        number = +string;\n        if (!isFinite(number)) {\n            options.onError(new Error('Bad number: ' + number + ' in ' + string));\n        }\n        else {\n            return number;\n        }\n    };\n    /**\n     * Add a property to 'object' that equals the given value.\n     * @param  {Object} object The object to add the value to.\n     * @param  {String} key    object[key] is set to the given value.\n     * @param  {mixed}  value  The value, may be a primitive or a function. If a\n     *                         function it is unwrapped as a property.\n     */\n    Parser.prototype.objectAddValue = function (object, key, value) {\n        var _this = this;\n        if (value && value[Node.isExpressionOrIdentifierSymbol]) {\n            Object.defineProperty(object, key, {\n                get: function () { return Node.value_of.apply(Node, [value].concat(_this.currentContextGlobals)); },\n                enumerable: true\n            });\n        }\n        else if (Array.isArray(value)) {\n            Object.defineProperty(object, key, {\n                get: function () { return value.map(function (v) { return Node.value_of.apply(Node, [v].concat(_this.currentContextGlobals)); }); },\n                enumerable: true\n            });\n        }\n        else {\n            // primitives\n            object[key] = value;\n        }\n    };\n    Parser.prototype.object = function () {\n        var key;\n        var object = {};\n        var ch = this.ch;\n        if (ch === '{') {\n            this.next('{');\n            ch = this.white();\n            if (ch === '}') {\n                ch = this.next('}');\n                return object;\n            }\n            while (ch) {\n                if (ch === '\"' || ch === \"'\" || ch === '`') {\n                    key = this.string();\n                }\n                else {\n                    key = this.name();\n                }\n                this.white();\n                ch = this.next(':');\n                if (Object.hasOwnProperty.call(object, key)) {\n                    this.error('Duplicate key \"' + key + '\"');\n                }\n                this.objectAddValue(object, key, this.expression());\n                ch = this.white();\n                if (ch === '}') {\n                    ch = this.next('}');\n                    return object;\n                }\n                this.next(',');\n                ch = this.white();\n            }\n        }\n        this.error('Bad object');\n    };\n    /**\n     * Read up to delim and return the string\n     * @param  {string} delim The delimiter, either ' or \"\n     * @return {string}       The string read.\n     */\n    Parser.prototype.readString = function (delim) {\n        var string = '';\n        var nodes = [''];\n        var plusOp = operators['+'];\n        var hex;\n        var i;\n        var uffff;\n        var interpolate = delim === '`';\n        var ch = this.next();\n        while (ch) {\n            if (ch === delim) {\n                ch = this.next();\n                if (interpolate) {\n                    nodes.push(plusOp);\n                }\n                nodes.push(string);\n                return nodes;\n            }\n            if (ch === '\\\\') {\n                ch = this.next();\n                if (ch === 'u') {\n                    uffff = 0;\n                    for (i = 0; i < 4; i += 1) {\n                        hex = parseInt(ch = this.next(), 16);\n                        if (!isFinite(hex)) {\n                            break;\n                        }\n                        uffff = uffff * 16 + hex;\n                    }\n                    string += String.fromCharCode(uffff);\n                }\n                else if (typeof escapee[ch] === 'string') {\n                    string += escapee[ch];\n                }\n                else {\n                    break;\n                }\n            }\n            else if (interpolate && ch === '$') {\n                ch = this.next();\n                if (ch === '{') {\n                    this.next('{');\n                    nodes.push(plusOp);\n                    nodes.push(string);\n                    nodes.push(plusOp);\n                    nodes.push(this.expression());\n                    string = '';\n                    // this.next('}');\n                }\n                else {\n                    string += '$' + ch;\n                }\n            }\n            else {\n                string += ch;\n            }\n            ch = this.next();\n        }\n        this.error('Bad string');\n    };\n    Parser.prototype.string = function () {\n        var ch = this.ch;\n        if (ch === '\"') {\n            return this.readString('\"').join('');\n        }\n        else if (ch === \"'\") {\n            return this.readString(\"'\").join('');\n        }\n        else if (ch === '`') {\n            return Node.create_root(this.readString('`'));\n        }\n        this.error('Bad string');\n    };\n    Parser.prototype.array = function () {\n        var array = [];\n        var ch = this.ch;\n        if (ch === '[') {\n            ch = this.next('[');\n            this.white();\n            if (ch === ']') {\n                ch = this.next(']');\n                return array;\n            }\n            while (ch) {\n                array.push(this.expression());\n                ch = this.white();\n                if (ch === ']') {\n                    ch = this.next(']');\n                    return array;\n                }\n                this.next(',');\n                ch = this.white();\n            }\n        }\n        this.error('Bad array');\n    };\n    Parser.prototype.value = function () {\n        var ch;\n        this.white();\n        ch = this.ch;\n        switch (ch) {\n            case '{': return this.object();\n            case '[': return this.array();\n            case '\"':\n            case \"'\":\n            case '`': return this.string();\n            case '-': return this.number();\n            default:\n                return ch >= '0' && ch <= '9' ? this.number() : this.identifier();\n        }\n    };\n    /**\n     * Get the function for the given operator.\n     * A `.precedence` value is added to the function, with increasing\n     * precedence having a higher number.\n     * @return {function} The function that performs the infix operation\n     */\n    Parser.prototype.operator = function (opts) {\n        var op = '';\n        var opFn;\n        var ch = this.white();\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        while (ch) {\n            if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||\n                ch === '\"' || ch === \"'\" || ch === '{' || ch === '(' ||\n                ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {\n                break;\n            }\n            if (!opts.not_an_array && ch === '[') {\n                break;\n            }\n            op += ch;\n            ch = this.next();\n            // An infix followed by the prefix e.g. a + @b\n            // TODO: other prefix unary operators\n            if (ch === '@') {\n                break;\n            }\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        if (op !== '') {\n            if (opts.prefix && op === '-') {\n                op = '&-';\n            }\n            opFn = operators[op];\n            if (!opFn) {\n                this.error(\"Bad operator: '\" + op + \"'.\");\n            }\n        }\n        return opFn;\n    };\n    /**\n     * Filters\n     * Returns what the Node interprets as an \"operator\".\n     * e.g.\n     *   <span data-bind=\"text: name | fit:20 | uppercase\"></span>\n     */\n    Parser.prototype.filter = function () {\n        var ch = this.next();\n        var args = [];\n        var nextFilter = function (v) { return v; };\n        var name = this.name();\n        if (!options.filters[name]) {\n            options.onError('Cannot find filter by the name of: ' + name);\n        }\n        ch = this.white();\n        while (ch) {\n            if (ch === ':') {\n                ch = this.next();\n                args.push(this.expression('|'));\n            }\n            if (ch === '|') {\n                nextFilter = this.filter();\n                break;\n            }\n            if (ch === ',') {\n                break;\n            }\n            ch = this.white();\n        }\n        var filter = function filter(value, ignored, context, globals, node) {\n            var argValues = [value];\n            for (var i = 0, j = args.length; i < j; ++i) {\n                argValues.push(Node.value_of(args[i], context, globals, node));\n            }\n            return nextFilter(options.filters[name].apply(null, argValues));\n        };\n        // Lowest precedence.\n        filter.precedence = 1;\n        return filter;\n    };\n    /**\n     * Parse an expression – builds an operator tree, in something like\n     * Shunting-Yard.\n     *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm\n     *\n     * @return {function}   A function that computes the value of the expression\n     *                      when called or a primitive.\n     */\n    Parser.prototype.expression = function (filterable) {\n        var op;\n        var nodes = [];\n        var ch = this.white();\n        while (ch) {\n            // unary prefix operators\n            op = this.operator({ prefix: true });\n            if (op) {\n                nodes.push(undefined); // LHS Tree node.\n                nodes.push(op);\n                ch = this.white();\n            }\n            if (ch === '(') {\n                this.next();\n                nodes.push(this.expression());\n                this.next(')');\n            }\n            else {\n                nodes.push(this.value());\n            }\n            ch = this.white();\n            if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||\n                ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {\n                break;\n            }\n            // filters\n            if (ch === '|' && this.lookahead() !== '|' && filterable) {\n                nodes.push(this.filter());\n                nodes.push(undefined);\n                break;\n            }\n            // infix or postfix operators\n            op = this.operator({ not_an_array: true });\n            if (op === operators['?']) {\n                this.ternary(nodes);\n                break;\n            }\n            else if (op === operators['.']) {\n                nodes.push(op);\n                nodes.push(this.member());\n                op = null;\n            }\n            else if (op === operators['[']) {\n                nodes.push(op);\n                nodes.push(this.expression());\n                ch = this.next(']');\n                op = null;\n            }\n            else if (op) {\n                nodes.push(op);\n            }\n            ch = this.white();\n            if (ch === ']' || (!op && ch === '(')) {\n                break;\n            }\n        }\n        if (nodes.length === 0) {\n            return undefined;\n        }\n        var dereferences = this.dereferences();\n        if (nodes.length === 1 && !dereferences.length) {\n            return nodes[0];\n        }\n        for (var i = 0, j = dereferences.length; i < j; ++i) {\n            var deref = dereferences[i];\n            if (deref.constructor === Arguments) {\n                nodes.push(operators.call);\n            }\n            else {\n                nodes.push(operators['.']);\n            }\n            nodes.push(deref);\n        }\n        return new Expression(nodes);\n    };\n    Parser.prototype.ternary = function (nodes) {\n        var ternary = new Ternary();\n        ternary.yes = this.expression();\n        this.next(':');\n        ternary.no = this.expression();\n        nodes.push(operators['?']);\n        nodes.push(ternary);\n    };\n    /**\n     * Parse the arguments to a function, returning an Array.\n     *\n     */\n    Parser.prototype.funcArguments = function () {\n        var args = [];\n        var ch = this.next('(');\n        while (ch) {\n            ch = this.white();\n            if (ch === ')') {\n                this.next(')');\n                return new Arguments(this, args);\n            }\n            else {\n                args.push(this.expression());\n                ch = this.white();\n            }\n            if (ch !== ')') {\n                this.next(',');\n            }\n        }\n        this.error('Bad arguments to function');\n    };\n    /**\n     * The literal string reference `abc` in an `x.abc` expression.\n     */\n    Parser.prototype.member = function () {\n        var member = '';\n        var ch = this.white();\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        while (ch) {\n            if (!isIdentifierChar(ch)) {\n                break;\n            }\n            member += ch;\n            ch = this.next();\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        return member;\n    };\n    /**\n     * A dereference applies to an identifer, being either a function\n     * call \"()\" or a membership lookup with square brackets \"[member]\".\n     * @return {fn or undefined}  Dereference function to be applied to the\n     *                            Identifier\n     */\n    Parser.prototype.dereference = function () {\n        var member;\n        var ch = this.white();\n        while (ch) {\n            if (ch === '(') {\n                // a(...) function call\n                return this.funcArguments();\n            }\n            else if (ch === '[') {\n                // a[x] membership\n                this.next('[');\n                member = this.expression();\n                this.white();\n                this.next(']');\n                return member;\n            }\n            else if (ch === '.') {\n                // a.x membership\n                this.next('.');\n                return this.member();\n            }\n            else {\n                break;\n            }\n        }\n    };\n    Parser.prototype.dereferences = function () {\n        var ch = this.white();\n        var dereferences = [];\n        var deref;\n        while (ch) {\n            deref = this.dereference();\n            if (deref !== undefined) {\n                dereferences.push(deref);\n            }\n            else {\n                break;\n            }\n        }\n        return dereferences;\n    };\n    Parser.prototype.identifier = function () {\n        var token = '';\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        var ch = this.white();\n        while (ch) {\n            if (!isIdentifierChar(ch)) {\n                break;\n            }\n            token += ch;\n            ch = this.next();\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        switch (token) {\n            case 'true': return true;\n            case 'false': return false;\n            case 'null': return null;\n            case 'undefined': return void 0;\n            case 'function':\n                throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.');\n        }\n        return new Identifier(this, token, this.dereferences());\n    };\n    Parser.prototype.readBindings = function () {\n        var key;\n        var bindings = {};\n        var sep;\n        var expr;\n        var ch = this.ch;\n        while (ch) {\n            key = this.name();\n            sep = this.white();\n            if (!sep || sep === ',') {\n                if (sep) {\n                    ch = this.next(',');\n                }\n                else {\n                    ch = '';\n                }\n                // A \"bare\" binding e.g. \"text\"; substitute value of 'null'\n                // so it becomes \"text: null\".\n                bindings[key] = null;\n            }\n            else {\n                if (key.indexOf('.') !== -1) {\n                    // Namespaced – i.e.\n                    //    `attr.css: x` becomes `attr: { css: x }`\n                    //     ^^^ - key\n                    key = key.split('.');\n                    bindings[key[0]] = bindings[key[0]] || {};\n                    if (key.length !== 2) {\n                        options.onError('Binding ' + key + ' should have two parts (a.b).');\n                    }\n                    else if (bindings[key[0]].constructor !== Object) {\n                        options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');\n                    }\n                    ch = this.next(':');\n                    this.objectAddValue(bindings[key[0]], key[1], this.expression(true));\n                }\n                else {\n                    ch = this.next(':');\n                    if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {\n                        // Extend a namespaced bindings e.g. we've previously seen\n                        // on.x, now we're seeing on: { 'abc' }.\n                        expr = this.expression(true);\n                        if (typeof expr !== 'object' || expr.constructor !== Object) {\n                            options.onError('Expected plain object for ' + key + ' value.');\n                        }\n                        else {\n                            extend(bindings[key], expr);\n                        }\n                    }\n                    else {\n                        bindings[key] = this.expression(true);\n                    }\n                }\n                this.white();\n                if (this.ch) {\n                    ch = this.next(',');\n                }\n                else {\n                    ch = '';\n                }\n            }\n        }\n        return bindings;\n    };\n    Parser.prototype.valueAsAccessor = function (value, context, globals, node) {\n        if (!value) {\n            return function () { return value; };\n        }\n        if (typeof value === 'function') {\n            return value;\n        }\n        if (value[Node.isExpressionOrIdentifierSymbol]) {\n            return function () { return Node.value_of(value, context, globals, node); };\n        }\n        if (Array.isArray(value)) {\n            return function () { return value.map(function (v) { return Node.value_of(v, context, globals, node); }); };\n        }\n        if (typeof (value) !== 'function') {\n            return function () { return clonePlainObjectDeep(value); };\n        }\n        throw new Error('Value has cannot be converted to accessor: ' + value);\n    };\n    /**\n    * Convert result[name] from a value to a function (i.e. `valueAccessor()`)\n    * @param  {object} result [Map of top-level names to values]\n    * @return {object}        [Map of top-level names to functions]\n    *\n    * Accessors may be one of (below) constAccessor, identifierAccessor,\n    * expressionAccessor, or nodeAccessor.\n    */\n    Parser.prototype.convertToAccessors = function (result, context, globals, node) {\n        var _this = this;\n        objectForEach(result, function (name, value) {\n            if (value instanceof Identifier) {\n                // Return a function that, with no arguments returns\n                // the value of the identifier, otherwise sets the\n                // value of the identifier to the first given argument.\n                Object.defineProperty(result, name, {\n                    value: function (optionalValue, options$$1) {\n                        var currentValue = value.get_value(undefined, context, globals, node);\n                        if (arguments.length === 0) {\n                            return currentValue;\n                        }\n                        var unchanged = optionalValue === currentValue;\n                        if (options$$1 && options$$1.onlyIfChanged && unchanged) {\n                            return;\n                        }\n                        return value.set_value(optionalValue, context, globals);\n                    }\n                });\n            }\n            else {\n                result[name] = _this.valueAsAccessor(value, context, globals, node);\n            }\n        });\n        return result;\n    };\n    Parser.prototype.runParse = function (source, fn) {\n        this.text = (source || '').trim();\n        this.at = 0;\n        this.ch = ' ';\n        try {\n            var result = fn();\n            this.white();\n            if (this.ch) {\n                this.error('Syntax Error');\n            }\n            return result;\n        }\n        catch (e) {\n            options.onError(e);\n        }\n    };\n    /**\n     * Get the bindings as name: accessor()\n     * @param  {string} source The binding string to parse.\n     * @return {object}        Map of name to accessor function.\n     */\n    Parser.prototype.parse = function (source, context, globals, node) {\n        var _this = this;\n        if (context === void 0) { context = {}; }\n        if (globals === void 0) { globals = {}; }\n        if (!source) {\n            return function () { return null; };\n        }\n        this.currentContextGlobals = [context, globals, node];\n        var parseFn = function () { return _this.readBindings(); };\n        var bindingAccessors = this.runParse(source, parseFn);\n        return this.convertToAccessors(bindingAccessors, context, globals, node);\n    };\n    /**\n     * Return a function that evaluates and returns the result of the expression.\n     */\n    Parser.prototype.parseExpression = function (source, context, globals, node) {\n        var _this = this;\n        if (context === void 0) { context = {}; }\n        if (globals === void 0) { globals = {}; }\n        if (!source) {\n            return function () { return ''; };\n        }\n        this.currentContextGlobals = [context, globals, node];\n        var parseFn = function () { return _this.expression(true); };\n        var bindingAccessors = this.runParse(source, parseFn);\n        return this.valueAsAccessor(bindingAccessors, context, globals, node);\n    };\n    return Parser;\n}());\n\n/* eslint no-cond-assign: 0 */\n// The following regular expressions will be used to split an object-literal string into tokens\n// These two match strings, either with double quotes or single quotes\nvar stringDouble = '\"(?:[^\"\\\\\\\\]|\\\\\\\\.)*\"';\nvar stringSingle = \"'(?:[^'\\\\\\\\]|\\\\\\\\.)*'\";\nvar stringRegexp = '/(?:[^/\\\\\\\\]|\\\\\\\\.)*/\\w*';\nvar specials = ',\"\\'{}()/:[\\\\]';\nvar everyThingElse = '[^\\\\s:,/][^' + specials + ']*[^\\\\s' + specials + ']';\nvar oneNotSpace = '[^\\\\s]';\nvar bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');\nvar divisionLookBehind = /[\\])\"'A-Za-z0-9_$]+$/;\nvar keywordRegexLookBehind = {\n    'in': 1,\n    'return': 1,\n    'typeof': 1\n};\n/**\n * Break a binding string (data-bind='x: val, y: ..') into a stable array\n * of {key: value}.\n */\nfunction parseObjectLiteral(objectLiteralString) {\n    // Trim leading and trailing spaces from the string\n    var str = stringTrim(objectLiteralString);\n    // Trim braces '{' surrounding the whole object literal\n    if (str.charCodeAt(0) === 123)\n        str = str.slice(1, -1);\n    // Split into tokens\n    var result = [], toks = str.match(bindingToken), key, values = [], depth = 0;\n    if (!toks) {\n        return [];\n    }\n    // Append a comma so that we don't need a separate code block to deal with the last item\n    toks.push(',');\n    for (var i = 0, tok; tok = toks[i]; ++i) {\n        var c = tok.charCodeAt(0);\n        // A comma signals the end of a key/value pair if depth is zero\n        if (c === 44) {\n            if (depth <= 0) {\n                result.push((key && values.length) ? {\n                    key: key,\n                    value: values.join('')\n                } : {\n                    'unknown': key || values.join('')\n                });\n                key = depth = 0;\n                values = [];\n                continue;\n            }\n            // Simply skip the colon that separates the name and value\n        }\n        else if (c === 58) {\n            if (!depth && !key && values.length === 1) {\n                key = values.pop();\n                continue;\n            }\n            // A set of slashes is initially matched as a regular expression, but could be division\n        }\n        else if (c === 47 && i && tok.length > 1) {\n            // Look at the end of the previous token to determine if the slash is actually division\n            var match = toks[i - 1].match(divisionLookBehind);\n            if (match && !keywordRegexLookBehind[match[0]]) {\n                // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)\n                str = str.substr(str.indexOf(tok) + 1);\n                toks = str.match(bindingToken);\n                toks.push(',');\n                i = -1;\n                // Continue with just the slash\n                tok = '/';\n            }\n            // Increment depth for parentheses, braces, and brackets so that interior commas are ignored\n        }\n        else if (c === 40 || c === 123 || c === 91) {\n            ++depth;\n        }\n        else if (c === 41 || c === 125 || c === 93) {\n            --depth;\n            // The key will be the first token; if it's a string, trim the quotes\n        }\n        else if (!key && !values.length && (c === 34 || c === 39)) {\n            tok = tok.slice(1, -1);\n        }\n        values.push(tok);\n    }\n    return result;\n}\n\nexport { Parser, Identifier, Arguments, Node, parseObjectLiteral };\n//# sourceMappingURL=tko.utils.parser.js.map\n","import { options } from 'tko.utils';\n\nvar BindingHandlerObject = /** @class */ (function () {\n    function BindingHandlerObject() {\n    }\n    BindingHandlerObject.prototype.set = function (nameOrObject, value) {\n        if (typeof nameOrObject === 'string') {\n            this[nameOrObject] = value;\n        }\n        else if (typeof nameOrObject === 'object') {\n            if (value !== undefined) {\n                options.onError(new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));\n            }\n            Object.assign(this, nameOrObject);\n        }\n        else {\n            options.onError(new Error('Given a bad binding handler type: ' + nameOrObject));\n        }\n    };\n    /**\n     * The handler may have a `.` in it, e.g. `attr.title`, in which case the\n     * handler is `attr`.  Otherwise it's the name given\n     */\n    BindingHandlerObject.prototype.get = function (nameOrDotted) {\n        var name = nameOrDotted.split('.')[0];\n        return this[name];\n    };\n    return BindingHandlerObject;\n}());\n\nvar Provider = /** @class */ (function () {\n    function Provider(params) {\n        if (params === void 0) { params = {}; }\n        if (this.constructor === Provider) {\n            throw new Error('Provider is an abstract base class.');\n        }\n        if (!('FOR_NODE_TYPES' in this)) {\n            // FOR_NODE_TYPES must return a list of integers corresponding to the\n            // node.nodeType's that the provider handles.\n            throw new Error('Providers must have FOR_NODE_TYPES property');\n        }\n        this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();\n        this.globals = params.globals || {};\n    }\n    Provider.prototype.nodeHasBindings = function () { };\n    Provider.prototype.getBindingAccessors = function () { };\n    Provider.prototype.preprocessNode = function () { };\n    Provider.prototype.postProcess = function () { };\n    return Provider;\n}());\n\nexport { Provider };\n//# sourceMappingURL=tko.provider.js.map\n","import { Parser, parseObjectLiteral } from 'tko.utils.parser';\nimport { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\n\r\n\r\nfunction __values(o) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n    if (m) return m.call(o);\r\n    return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n}\n\n/**\n * BindingStringProvider is an abstract base class parses a binding string.\n *\n * Children must implement `nodeHasBindings` and `getBindingString`.\n */\nvar BindingStringProvider = /** @class */ (function (_super) {\n    __extends(BindingStringProvider, _super);\n    function BindingStringProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    /** Call bindingHandler.preprocess on each respective binding string.\n     *\n     * The `preprocess` property of bindingHandler must be a static\n     * function (i.e. on the object or constructor).\n     */\n    BindingStringProvider.prototype.processBinding = function (key, value) {\n        var _a, handlerName, property, handler, bindingsAddedByHandler_1, chainFn, _i, bindingsAddedByHandler_2, _b, key_1, value_1;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _a = key.split('.'), handlerName = _a[0], property = _a[1];\n                    handler = this.bindingHandlers.get(handlerName);\n                    if (!(handler && handler.preprocess)) return [3 /*break*/, 5];\n                    bindingsAddedByHandler_1 = [];\n                    chainFn = function () {\n                        var args = [];\n                        for (var _i = 0; _i < arguments.length; _i++) {\n                            args[_i] = arguments[_i];\n                        }\n                        return bindingsAddedByHandler_1.push(args);\n                    };\n                    value = handler.preprocess(value, key, chainFn);\n                    _i = 0, bindingsAddedByHandler_2 = bindingsAddedByHandler_1;\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < bindingsAddedByHandler_2.length)) return [3 /*break*/, 4];\n                    _b = bindingsAddedByHandler_2[_i], key_1 = _b[0], value_1 = _b[1];\n                    return [5 /*yield**/, __values(this.processBinding(key_1, value_1))];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [3 /*break*/, 6];\n                case 5:\n                    if (property) {\n                        value = \"{\" + property + \":\" + value + \"}\";\n                    }\n                    _c.label = 6;\n                case 6: return [4 /*yield*/, handlerName + \":\" + value];\n                case 7:\n                    _c.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    BindingStringProvider.prototype.generateBindingString = function (bindingString) {\n        var _i, _a, _b, key, unknown, value;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _i = 0, _a = parseObjectLiteral(bindingString);\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    _b = _a[_i], key = _b.key, unknown = _b.unknown, value = _b.value;\n                    return [5 /*yield**/, __values(this.processBinding(key || unknown, value))];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    BindingStringProvider.prototype.preProcessBindings = function (bindingString) {\n        return Array.from(this.generateBindingString(bindingString)).join(',');\n    };\n    BindingStringProvider.prototype.getBindingAccessors = function (node, context) {\n        var bindingString = node && this.getBindingString(node);\n        if (!bindingString) {\n            return;\n        }\n        var processed = this.preProcessBindings(bindingString);\n        return new Parser().parse(processed, context, this.globals, node);\n    };\n    BindingStringProvider.prototype.getBindingString = function () { throw new Error('Overload getBindingString.'); };\n    return BindingStringProvider;\n}(Provider));\n\nexport { BindingStringProvider };\n//# sourceMappingURL=tko.provider.bindingString.js.map\n","import { virtualElements } from 'tko.utils';\nimport { BindingStringProvider } from 'tko.provider.bindingString';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar VirtualProvider = /** @class */ (function (_super) {\n    __extends(VirtualProvider, _super);\n    function VirtualProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(VirtualProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [8]; } // document.COMMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    VirtualProvider.prototype.getBindingString = function (node) {\n        if (node.nodeType === document.COMMENT_NODE) {\n            return virtualElements.virtualNodeBindingValue(node);\n        }\n    };\n    VirtualProvider.prototype.nodeHasBindings = function (node) {\n        if (node.nodeType === document.COMMENT_NODE) {\n            return virtualElements.isStartComment(node);\n        }\n    };\n    return VirtualProvider;\n}(BindingStringProvider));\n\nexport { VirtualProvider };\n//# sourceMappingURL=tko.provider.virtual.js.map\n","import { BindingStringProvider } from 'tko.provider.bindingString';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar DataBindProvider = /** @class */ (function (_super) {\n    __extends(DataBindProvider, _super);\n    function DataBindProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(DataBindProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(DataBindProvider.prototype, \"BIND_ATTRIBUTE\", {\n        get: function () {\n            return 'data-bind';\n        },\n        enumerable: true,\n        configurable: true\n    });\n    DataBindProvider.prototype.getBindingString = function (node) {\n        if (node.nodeType === document.ELEMENT_NODE) {\n            return node.getAttribute(this.BIND_ATTRIBUTE);\n        }\n    };\n    DataBindProvider.prototype.nodeHasBindings = function (node) {\n        if (node.nodeType === document.ELEMENT_NODE) {\n            return node.hasAttribute(this.BIND_ATTRIBUTE);\n        }\n    };\n    return DataBindProvider;\n}(BindingStringProvider));\n\nexport { DataBindProvider };\n//# sourceMappingURL=tko.provider.databind.js.map\n","import { addDisposeCallback, createSymbolOrString } from 'tko.utils';\nimport { computed } from 'tko.computed';\n\n'use strict';\nvar SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');\nvar ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');\nvar LifeCycle = /** @class */ (function () {\n    function LifeCycle() {\n    }\n    // NOTE: For more advanced integration as an ES6 mixin, see e.g.:\n    // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/\n    /**\n     * Copy the properties of the LifeCycle class to the target (or its prototype)\n     *\n     * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.\n     */\n    LifeCycle.mixInto = function (Constructor) {\n        var target = Constructor.prototype || Constructor;\n        var mixin = LifeCycle.prototype;\n        for (var _i = 0, _a = Object.getOwnPropertyNames(mixin); _i < _a.length; _i++) {\n            var prop = _a[_i];\n            target[prop] = mixin[prop];\n        }\n    };\n    LifeCycle.prototype.subscribe = function (observable, action) {\n        if (typeof action === 'string') {\n            action = this[action].bind(this);\n        }\n        this.addDisposable(observable.subscribe(action));\n    };\n    LifeCycle.prototype.computed = function (params) {\n        if (typeof params === 'string') {\n            params = { read: this[params], write: this[params], owner: this };\n        }\n        else if (typeof params === 'object') {\n            // Pass directly.\n        }\n        else if (typeof params === 'function') {\n            params = { read: params, write: params };\n        }\n        else {\n            throw new Error('LifeCycle::computed not given a valid type.');\n        }\n        params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];\n        return this.addDisposable(computed(params));\n    };\n    /**\n     * Add an event listener for the given or anchored node.\n     * @param {node} [node] (optional) The target node (otherwise the anchored node)\n     * @param {string} [type] Event type\n     * @param {function|string} [action] Either call the given function or `this[action]`\n     * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`\n     */\n    LifeCycle.prototype.addEventListener = function () {\n        var args = [];\n        for (var _i = 0; _i < arguments.length; _i++) {\n            args[_i] = arguments[_i];\n        }\n        var node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];\n        var type = args[0], act = args[1], options = args[2];\n        var handler = typeof act === 'string' ? this[act].bind(this) : act;\n        this.__addEventListener(node, type, handler, options);\n    };\n    LifeCycle.prototype.__addEventListener = function (node, eventType, handler, options) {\n        node.addEventListener(eventType, handler, options);\n        function dispose() { node.removeEventListener(eventType, handler); }\n        addDisposeCallback(node, dispose);\n        this.addDisposable({ dispose: dispose });\n    };\n    LifeCycle.prototype.anchorTo = function (node) {\n        var _this = this;\n        addDisposeCallback(node, function () { return _this.dispose(); });\n        this[ANCHOR_NODE] = node;\n    };\n    LifeCycle.prototype.dispose = function () {\n        var subscriptions = this[SUBSCRIPTIONS] || [];\n        subscriptions.forEach(function (s) { return s.dispose(); });\n        this[SUBSCRIPTIONS] = [];\n        this[ANCHOR_NODE] = null;\n    };\n    LifeCycle.prototype.addDisposable = function (subscription) {\n        var subscriptions = this[SUBSCRIPTIONS] || [];\n        if (!this[SUBSCRIPTIONS]) {\n            this[SUBSCRIPTIONS] = subscriptions;\n        }\n        if (typeof subscription.dispose !== 'function') {\n            throw new Error('Lifecycle::addDisposable argument missing `dispose`.');\n        }\n        subscriptions.push(subscription);\n        return subscription;\n    };\n    return LifeCycle;\n}());\n\nexport { LifeCycle };\n//# sourceMappingURL=tko.lifecycle.js.map\n","import { dependencyDetection, subscribable } from 'tko.observable';\nimport { cloneNodes, getObjectOwnProperty, isDocumentFragment, isDomElement, makeArray, parseHtmlFragment, tagNameLower, tasks } from 'tko.utils';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar loadingSubscribablesCache = {};\nvar loadedDefinitionsCache = {}; // Tracks component loads that have already completed\nfunction loadComponentAndNotify(componentName, callback) {\n    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName), completedAsync;\n    if (!_subscribable) {\n        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.\n        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();\n        _subscribable.subscribe(callback);\n        beginLoadingComponent(componentName, function (definition, config) {\n            var isSynchronousComponent = !!(config && config.synchronous);\n            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };\n            delete loadingSubscribablesCache[componentName];\n            // For API consistency, all loads complete asynchronously. However we want to avoid\n            // adding an extra task schedule if it's unnecessary (i.e., the completion is already\n            // async).\n            //\n            // You can bypass the 'always asynchronous' feature by putting the synchronous:true\n            // flag on your component configuration when you register it.\n            if (completedAsync || isSynchronousComponent) {\n                // Note that notifySubscribers ignores any dependencies read within the callback.\n                // See comment in loaderRegistryBehaviors.js for reasoning\n                _subscribable.notifySubscribers(definition);\n            }\n            else {\n                tasks.schedule(function () {\n                    _subscribable.notifySubscribers(definition);\n                });\n            }\n        });\n        completedAsync = true;\n    }\n    else {\n        _subscribable.subscribe(callback);\n    }\n}\nfunction beginLoadingComponent(componentName, callback) {\n    getFirstResultFromLoaders('getConfig', [componentName], function (config) {\n        if (config) {\n            // We have a config, so now load its definition\n            getFirstResultFromLoaders('loadComponent', [componentName, config], function (definition) {\n                callback(definition, config);\n            });\n        }\n        else {\n            // The component has no config - it's unknown to all the loaders.\n            // Note that this is not an error (e.g., a module loading error) - that would abort the\n            // process and this callback would not run. For this callback to run, all loaders must\n            // have confirmed they don't know about this component.\n            callback(null, null);\n        }\n    });\n}\nfunction getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {\n    // On the first call in the stack, start with the full set of loaders\n    if (!candidateLoaders) {\n        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array\n    }\n    // Try the next candidate\n    var currentCandidateLoader = candidateLoaders.shift();\n    if (currentCandidateLoader) {\n        var methodInstance = currentCandidateLoader[methodName];\n        if (methodInstance) {\n            var wasAborted = false, synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function (result) {\n                if (wasAborted) {\n                    callback(null);\n                }\n                else if (result !== null) {\n                    // This candidate returned a value. Use it.\n                    callback(result);\n                }\n                else {\n                    // Try the next candidate\n                    getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n                }\n            }));\n            // Currently, loaders may not return anything synchronously. This leaves open the possibility\n            // that we'll extend the API to support synchronous return values in the future. It won't be\n            // a breaking change, because currently no loader is allowed to return anything except undefined.\n            if (synchronousReturnValue !== undefined) {\n                wasAborted = true;\n                // Method to suppress exceptions will remain undocumented. This is only to keep\n                // KO's specs running tidily, since we can observe the loading got aborted without\n                // having exceptions cluttering up the console too.\n                if (!currentCandidateLoader.suppressLoaderExceptions) {\n                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');\n                }\n            }\n        }\n        else {\n            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.\n            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n        }\n    }\n    else {\n        // No candidates returned a value\n        callback(null);\n    }\n}\nvar registry = {\n    get: function (componentName, callback) {\n        var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);\n        if (cachedDefinition) {\n            // It's already loaded and cached. Reuse the same definition object.\n            // Note that for API consistency, even cache hits complete asynchronously by default.\n            // You can bypass this by putting synchronous:true on your component config.\n            if (cachedDefinition.isSynchronousComponent) {\n                dependencyDetection.ignore(function () {\n                    callback(cachedDefinition.definition);\n                });\n            }\n            else {\n                tasks.schedule(function () { callback(cachedDefinition.definition); });\n            }\n        }\n        else {\n            // Join the loading process that is already underway, or start a new one.\n            loadComponentAndNotify(componentName, callback);\n        }\n    },\n    clearCachedDefinition: function (componentName) {\n        delete loadedDefinitionsCache[componentName];\n    },\n    _getFirstResultFromLoaders: getFirstResultFromLoaders,\n    loaders: []\n};\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends$1(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// The default loader is responsible for two things:\n// 1. Maintaining the default in-memory registry of component configuration objects\n//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))\n// 2. Answering requests for components by fetching configuration objects\n//    from that default in-memory registry and resolving them into standard\n//    component definition objects (of the form { createViewModel: ..., template: ... })\n// Custom loaders may override either of these facilities, i.e.,\n// 1. To supply configuration objects from some other source (e.g., conventions)\n// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.\nvar defaultConfigRegistry = {};\nfunction register(componentName, config) {\n    if (!config) {\n        throw new Error('Invalid configuration for ' + componentName);\n    }\n    if (isRegistered(componentName)) {\n        throw new Error('Component ' + componentName + ' is already registered');\n    }\n    defaultConfigRegistry[componentName] = config;\n}\nfunction isRegistered(componentName) {\n    return defaultConfigRegistry.hasOwnProperty(componentName);\n}\nfunction unregister(componentName) {\n    delete defaultConfigRegistry[componentName];\n    registry.clearCachedDefinition(componentName);\n}\nvar defaultLoader = {\n    getConfig: function (componentName, callback) {\n        var result = defaultConfigRegistry.hasOwnProperty(componentName)\n            ? defaultConfigRegistry[componentName]\n            : null;\n        callback(result);\n    },\n    loadComponent: function (componentName, config, callback) {\n        var errorCallback = makeErrorCallback(componentName);\n        possiblyGetConfigFromAmd(errorCallback, config, function (loadedConfig) {\n            resolveConfig(componentName, errorCallback, loadedConfig, callback);\n        });\n    },\n    loadTemplate: function (componentName, templateConfig, callback) {\n        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);\n    },\n    loadViewModel: function (componentName, viewModelConfig, callback) {\n        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);\n    }\n};\nvar createViewModelKey = 'createViewModel';\n// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it\n// into the standard component definition format:\n//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.\n// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed\n// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,\n// so this is implemented manually below.\nfunction resolveConfig(componentName, errorCallback, config, callback) {\n    var result = {}, makeCallBackWhenZero = 2, tryIssueCallback = function () {\n        if (--makeCallBackWhenZero === 0) {\n            callback(result);\n        }\n    }, templateConfig = config['template'], viewModelConfig = config['viewModel'];\n    if (templateConfig) {\n        possiblyGetConfigFromAmd(errorCallback, templateConfig, function (loadedConfig) {\n            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function (resolvedTemplate) {\n                result['template'] = resolvedTemplate;\n                tryIssueCallback();\n            });\n        });\n    }\n    else {\n        tryIssueCallback();\n    }\n    if (viewModelConfig) {\n        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function (loadedConfig) {\n            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function (resolvedViewModel) {\n                result[createViewModelKey] = resolvedViewModel;\n                tryIssueCallback();\n            });\n        });\n    }\n    else {\n        tryIssueCallback();\n    }\n}\nfunction resolveTemplate(errorCallback, templateConfig, callback) {\n    if (typeof templateConfig === 'string') {\n        // Markup - parse it\n        callback(parseHtmlFragment(templateConfig));\n    }\n    else if (templateConfig instanceof Array) {\n        // Assume already an array of DOM nodes - pass through unchanged\n        callback(templateConfig);\n    }\n    else if (isDocumentFragment(templateConfig)) {\n        // Document fragment - use its child nodes\n        callback(makeArray(templateConfig.childNodes));\n    }\n    else if (templateConfig['element']) {\n        var element = templateConfig['element'];\n        if (isDomElement(element)) {\n            // Element instance - copy its child nodes\n            callback(cloneNodesFromTemplateSourceElement(element));\n        }\n        else if (typeof element === 'string') {\n            // Element ID - find it, then copy its child nodes\n            var elemInstance = document.getElementById(element);\n            if (elemInstance) {\n                callback(cloneNodesFromTemplateSourceElement(elemInstance));\n            }\n            else {\n                errorCallback('Cannot find element with ID ' + element);\n            }\n        }\n        else {\n            errorCallback('Unknown element type: ' + element);\n        }\n    }\n    else {\n        errorCallback('Unknown template value: ' + templateConfig);\n    }\n}\nfunction resolveViewModel(errorCallback, viewModelConfig, callback) {\n    if (typeof viewModelConfig === 'function') {\n        // Constructor - convert to standard factory function format\n        // By design, this does *not* supply componentInfo to the constructor, as the intent is that\n        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only\n        // be used in factory functions, not viewmodel constructors.\n        callback(function (params /*, componentInfo */) {\n            return new viewModelConfig(params);\n        });\n    }\n    else if (typeof viewModelConfig[createViewModelKey] === 'function') {\n        // Already a factory function - use it as-is\n        callback(viewModelConfig[createViewModelKey]);\n    }\n    else if ('instance' in viewModelConfig) {\n        // Fixed object instance - promote to createViewModel format for API consistency\n        var fixedInstance = viewModelConfig['instance'];\n        callback(function () {\n            return fixedInstance;\n        });\n    }\n    else if ('viewModel' in viewModelConfig) {\n        // Resolved AMD module whose value is of the form { viewModel: ... }\n        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);\n    }\n    else {\n        errorCallback('Unknown viewModel value: ' + viewModelConfig);\n    }\n}\nfunction cloneNodesFromTemplateSourceElement(elemInstance) {\n    switch (tagNameLower(elemInstance)) {\n        case 'script':\n            return parseHtmlFragment(elemInstance.text);\n        case 'textarea':\n            return parseHtmlFragment(elemInstance.value);\n        case 'template':\n            // For browsers with proper <template> element support (i.e., where the .content property\n            // gives a document fragment), use that document fragment.\n            if (isDocumentFragment(elemInstance.content)) {\n                return cloneNodes(elemInstance.content.childNodes);\n            }\n    }\n    // Regular elements such as <div>, and <template> elements on old browsers that don't really\n    // understand <template> and just treat it as a regular container\n    return cloneNodes(elemInstance.childNodes);\n}\nfunction possiblyGetConfigFromAmd(errorCallback, config, callback) {\n    if (typeof config.require === 'string') {\n        // The config is the value of an AMD module\n        if (window.amdRequire || window.require) {\n            (window.amdRequire || window.require)([config.require], callback);\n        }\n        else {\n            errorCallback('Uses require, but no AMD loader is present');\n        }\n    }\n    else {\n        callback(config);\n    }\n}\nfunction makeErrorCallback(componentName) {\n    return function (message) {\n        throw new Error('Component \\'' + componentName + '\\': ' + message);\n    };\n}\n// By default, the default loader is the only registered component loader\nregistry.loaders.push(defaultLoader);\n\n/**\n * Component --- Abstract Base Class\n *\n * This simplifies and compartmentalizes Components.  Use this:\n *\n *    class CompX extends ComponentABC {\n *    \tstatic get element () { return 'comp-x-id' }\n *    \tstatic get sync () { return false }\n *    \tstatic get elementName () { return 'comp-x' }\n *    }\n *    CompX.register()\n *\n * instead of:\n *\n *   class CompX {}\n *\n *   ko.components.register('comp-x', {\n *     viewModel: CompX,\n *     synchronous: false,\n *     template: { element: 'comp-x' }\n *   })\n *\n * As well, gain all the benefits of a LifeCycle, namely automated\n * event and subscription addition/removal.\n *\n * NOTE: A Component created this way can add events to the component node\n * with `this.addEventListener(type, action)`.\n */\nvar ComponentABC = /** @class */ (function (_super) {\n    __extends$1(ComponentABC, _super);\n    function ComponentABC() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ComponentABC, \"elementName\", {\n        /**\n         * @return {string} The custom node name of this component.\n         */\n        get: function () {\n            throw new Error(\"[ComponentABC] `elementName` must be overloaded.\");\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"template\", {\n        /**\n         * Overload this to return:\n         * 1. A string of markup\n         * 2. An array of DOM nodes\n         * 3. A document fragment\n         * 4. An AMD module (with `{require: 'some/template'}`)\n         * @return {mixed} One of the accepted template types for the ComponentBinding.\n         */\n        get: function () { return { element: this.element }; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"element\", {\n        /**\n         * This is called by the default `template`.  Overload this to return:\n         * 1. The element ID\n         * 2. A DOM node itself\n         * @return {string|HTMLElement} either the element ID or actual element.\n         */\n        get: function () {\n            throw new Error(\"[ComponentABC] `element` must be overloaded.\");\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"sync\", {\n        /**\n         * @return {bool} True if the component shall load synchronously\n         */\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    ComponentABC.register = function (name) {\n        if (name === void 0) { name = this.elementName; }\n        var viewModel = this;\n        var template = this.template;\n        var synchronous = this.sync;\n        register(name, { viewModel: viewModel, template: template, synchronous: synchronous });\n    };\n    return ComponentABC;\n}(LifeCycle));\n\nvar index = {\n    ComponentABC: ComponentABC,\n    // -- Registry --\n    get: registry.get,\n    clearCachedDefinition: registry.clearCachedDefinition,\n    // -- Loader --\n    register: register,\n    isRegistered: isRegistered,\n    unregister: unregister,\n    defaultLoader: defaultLoader,\n    // \"Privately\" expose the underlying config registry for use in old-IE shim\n    _allRegisteredComponents: defaultConfigRegistry,\n    get loaders() { return registry.loaders; },\n    set loaders(loaders) { registry.loaders = loaders; }\n};\n\nexport default index;\n//# sourceMappingURL=tko.utils.component.js.map\n","import { objectMap, tagNameLower } from 'tko.utils';\nimport registry from 'tko.utils.component';\nimport { isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed } from 'tko.computed';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar ComponentProvider = /** @class */ (function (_super) {\n    __extends(ComponentProvider, _super);\n    function ComponentProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ComponentProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    ComponentProvider.prototype.nodeHasBindings = function (node) {\n        return Boolean(this.getComponentNameForNode(node));\n    };\n    ComponentProvider.prototype.getBindingAccessors = function (node, context) {\n        var _this = this;\n        var componentName = this.getComponentNameForNode(node);\n        if (!componentName) {\n            return;\n        }\n        var component = function () { return ({\n            name: componentName,\n            params: _this.getComponentParams(node, context)\n        }); };\n        return { component: component };\n    };\n    ComponentProvider.prototype.getComponentNameForNode = function (node) {\n        if (node.nodeType !== node.ELEMENT_NODE) {\n            return;\n        }\n        var tagName = tagNameLower(node);\n        if (registry.isRegistered(tagName)) {\n            var hasDash = tagName.includes('-');\n            var isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';\n            if (hasDash || isUnknownEntity) {\n                return tagName;\n            }\n        }\n    };\n    ComponentProvider.prototype.getComponentParams = function (node, context) {\n        var _this = this;\n        var parser = new Parser(node, context, this.globals);\n        var paramsString = (node.getAttribute('params') || '').trim();\n        var accessors = parser.parse(paramsString, context, node);\n        if (!accessors || Object.keys(accessors).length === 0) {\n            return { $raw: {} };\n        }\n        var $raw = objectMap(accessors, function (value) { return computed(value, null, { disposeWhenNodeIsRemoved: node }); });\n        var params = objectMap($raw, function (v) { return _this.makeParamValue(node, v); });\n        return Object.assign({ $raw: $raw }, params);\n    };\n    ComponentProvider.prototype.makeParamValue = function (node, paramValueComputed) {\n        var paramValue = paramValueComputed.peek();\n        // Does the evaluation of the parameter value unwrap any observables?\n        if (!paramValueComputed.isActive()) {\n            // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.\n            // Example: \"someVal: firstName, age: 123\" (whether or not firstName is an observable/computed)\n            return paramValue;\n        }\n        // Yes it does. Supply a computed property that unwraps both the outer (binding expression)\n        // level of observability, and any inner (resulting model value) level of observability.\n        // This means the component doesn't have to worry about multiple unwrapping. If the value is a\n        // writable observable, the computed will also be writable and pass the value on to the observable.\n        var isWriteable = isWriteableObservable(paramValue);\n        return computed({\n            read: function () { return unwrap(paramValueComputed()); },\n            write: isWriteable ? function (v) { return paramValueComputed()(v); } : null,\n            disposeWhenNodeIsRemoved: node\n        });\n    };\n    return ComponentProvider;\n}(Provider));\n\nexport { ComponentProvider };\n//# sourceMappingURL=tko.provider.component.js.map\n","import { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\n/**\n * Convert attributes with ko-* to bindings.\n *\n * e.g.\n * <div ko-visible='value'></div>\n */\nvar AttrProvider = /** @class */ (function (_super) {\n    __extends(AttrProvider, _super);\n    function AttrProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(AttrProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(AttrProvider.prototype, \"PREFIX\", {\n        get: function () { return 'ko-'; },\n        enumerable: true,\n        configurable: true\n    });\n    AttrProvider.prototype.getBindingAttributesList = function (node) {\n        var _this = this;\n        if (!node.hasAttributes()) {\n            return [];\n        }\n        return Array.from(node.attributes)\n            .filter(function (attr) { return attr.name.startsWith(_this.PREFIX); });\n    };\n    AttrProvider.prototype.nodeHasBindings = function (node) {\n        return this.getBindingAttributesList(node).length > 0;\n    };\n    AttrProvider.prototype.getBindingAccessors = function (node, context) {\n        return Object.assign.apply(Object, [{}].concat(this.handlersFromAttributes(node, context)));\n    };\n    AttrProvider.prototype.handlersFromAttributes = function (node, context) {\n        var _this = this;\n        var _loop_1, this_1, _i, _a, attr;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _loop_1 = function (attr) {\n                        var name, _a;\n                        return __generator(this, function (_b) {\n                            switch (_b.label) {\n                                case 0:\n                                    name = attr.name.substr(this_1.PREFIX.length);\n                                    return [4 /*yield*/, (_a = {}, _a[name] = function () { return _this.getValue(attr.value, context, node); }, _a)];\n                                case 1:\n                                    _b.sent();\n                                    return [2 /*return*/];\n                            }\n                        });\n                    };\n                    this_1 = this;\n                    _i = 0, _a = this.getBindingAttributesList(node);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    return [5 /*yield**/, _loop_1(attr)];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttrProvider.prototype.getValue = function (token, $context, node) {\n        /* FIXME: This duplicates Identifier.prototype.lookup_value; it should\n           be refactored into e.g. a BindingContext method */\n        if (!token) {\n            return;\n        }\n        var $data = $context.$data;\n        switch (token) {\n            case '$element': return node;\n            case '$context': return $context;\n            case 'this':\n            case '$data': return $context.$data;\n        }\n        if ($data instanceof Object && token in $data) {\n            return $data[token];\n        }\n        if (token in $context) {\n            return $context[token];\n        }\n        if (token in this.globals) {\n            return this.globals[token];\n        }\n        throw new Error(\"The variable '\" + token + \" not found.\");\n    };\n    return AttrProvider;\n}(Provider));\n\nexport { AttrProvider as AttributeProvider };\n//# sourceMappingURL=tko.provider.attr.js.map\n","import { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\nvar MultiProvider = /** @class */ (function (_super) {\n    __extends(MultiProvider, _super);\n    function MultiProvider(params) {\n        if (params === void 0) { params = {}; }\n        var _this = _super.call(this, params) || this;\n        var providers = params.providers || [];\n        _this.nodeTypeMap = {};\n        _this.nodeTypes = [];\n        _this.providers = [];\n        providers.forEach(function (p) { return _this.addProvider(p); });\n        return _this;\n    }\n    Object.defineProperty(MultiProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return this.nodeTypes; },\n        enumerable: true,\n        configurable: true\n    });\n    MultiProvider.prototype.addProvider = function (provider) {\n        this.providers.push(provider);\n        provider.bindingHandlers = this.bindingHandlers;\n        provider.globals = this.globals;\n        var nodeTypeMap = this.nodeTypeMap;\n        for (var _i = 0, _a = provider.FOR_NODE_TYPES; _i < _a.length; _i++) {\n            var nodeType = _a[_i];\n            if (!nodeTypeMap[nodeType]) {\n                nodeTypeMap[nodeType] = [];\n            }\n            nodeTypeMap[nodeType].push(provider);\n        }\n        this.nodeTypes = Object.keys(this.nodeTypeMap).map(function (k) { return parseInt(k, 10); });\n    };\n    MultiProvider.prototype.providersFor = function (node) {\n        return this.nodeTypeMap[node.nodeType] || [];\n    };\n    MultiProvider.prototype.nodeHasBindings = function (node) {\n        return this.providersFor(node).some(function (p) { return p.nodeHasBindings(node); });\n    };\n    MultiProvider.prototype.preprocessNode = function (node) {\n        for (var _i = 0, _a = this.providersFor(node); _i < _a.length; _i++) {\n            var provider = _a[_i];\n            var newNodes = provider.preprocessNode(node);\n            if (newNodes) {\n                return newNodes;\n            }\n        }\n    };\n    MultiProvider.prototype.enumerateProviderBindings = function (node, ctx) {\n        var _i, _a, provider, bindings, _b, _c, _d, key, accessor;\n        return __generator(this, function (_e) {\n            switch (_e.label) {\n                case 0:\n                    _i = 0, _a = this.providersFor(node);\n                    _e.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 6];\n                    provider = _a[_i];\n                    bindings = provider.getBindingAccessors(node, ctx) || {};\n                    _b = 0, _c = Object.entries(bindings || {});\n                    _e.label = 2;\n                case 2:\n                    if (!(_b < _c.length)) return [3 /*break*/, 5];\n                    _d = _c[_b], key = _d[0], accessor = _d[1];\n                    return [4 /*yield*/, [key, accessor]];\n                case 3:\n                    _e.sent();\n                    _e.label = 4;\n                case 4:\n                    _b++;\n                    return [3 /*break*/, 2];\n                case 5:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 6: return [2 /*return*/];\n            }\n        });\n    };\n    MultiProvider.prototype.getBindingAccessors = function (node, ctx) {\n        node = this.preprocessNode(node) || node;\n        var bindings = {};\n        for (var _i = 0, _a = this.enumerateProviderBindings(node, ctx); _i < _a.length; _i++) {\n            var _b = _a[_i], key = _b[0], accessor = _b[1];\n            if (key in bindings) {\n                throw new Error(\"The binding \\\"\" + key + \"\\\" is duplicated by multiple providers\");\n            }\n            bindings[key] = accessor;\n        }\n        return bindings;\n    };\n    return MultiProvider;\n}(Provider));\n\nexport { MultiProvider };\n//# sourceMappingURL=tko.provider.multi.js.map\n","import { unwrap } from 'tko.observable';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\n\r\n\r\nfunction __values(o) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n    if (m) return m.call(o);\r\n    return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n}\n\nvar INNER_EXPRESSION = /^([\\s\\S]*)}}([\\s\\S]*?)\\{\\{([\\s\\S]*)$/;\nvar OUTER_EXPRESSION = /^([\\s\\S]*?)\\{\\{([\\s\\S]*)}}([\\s\\S]*)$/;\nvar BINDING_EXPRESSION = /^([^,\"'{}()/:[\\]\\s]+)\\s+([^\\s:].*)/;\nvar Interpolated = /** @class */ (function () {\n    function Interpolated(text) {\n        this.text = text;\n    }\n    Interpolated.prototype.trim = function (string) {\n        return string === null ? '' : string.trim();\n    };\n    return Interpolated;\n}());\nvar Expression = /** @class */ (function (_super) {\n    __extends(Expression, _super);\n    function Expression() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Expression.prototype.asAttr = function (context, globals, node) {\n        return new Parser().parseExpression(this.text, context, globals, node)();\n    };\n    Expression.prototype.textNodeReplacement = function (textNode) {\n        var text, ownerDocument, firstChar, lastChar, closeComment, binding, matches;\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0:\n                    text = this.trim(this.text);\n                    ownerDocument = textNode ? textNode.ownerDocument : document;\n                    firstChar = text[0];\n                    lastChar = text[text.length - 1];\n                    closeComment = true;\n                    if (firstChar === '#') {\n                        if (lastChar === '/') {\n                            binding = text.slice(1, -1);\n                        }\n                        else {\n                            binding = text.slice(1);\n                            closeComment = false;\n                        }\n                        matches = binding.match(BINDING_EXPRESSION);\n                        if (matches) {\n                            binding = matches[1] + ':' + matches[2];\n                        }\n                    }\n                    else if (firstChar === '/') {\n                        // replace only with a closing comment\n                    }\n                    else if (firstChar === '{' && lastChar === '}') {\n                        binding = 'html:' + this.trim(text.slice(1, -1));\n                    }\n                    else {\n                        binding = 'text:' + this.trim(text);\n                    }\n                    if (!binding) return [3 /*break*/, 2];\n                    return [4 /*yield*/, ownerDocument.createComment('ko ' + binding)];\n                case 1:\n                    _a.sent();\n                    _a.label = 2;\n                case 2:\n                    if (!closeComment) return [3 /*break*/, 4];\n                    return [4 /*yield*/, ownerDocument.createComment('/ko')];\n                case 3:\n                    _a.sent();\n                    _a.label = 4;\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    return Expression;\n}(Interpolated));\nvar Text = /** @class */ (function (_super) {\n    __extends(Text, _super);\n    function Text() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Text.prototype.asAttr = function () { return this.text; };\n    Text.prototype.textNodeReplacement = function () {\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0: return [4 /*yield*/, document.createTextNode(this.text.replace(/\"/g, '\\\\\"'))];\n                case 1:\n                    _a.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    return Text;\n}(Interpolated));\n/**\n *          Interpolation Parsing\n */\nfunction innerParse(text) {\n    var innerMatch, _a, pre, inner, post;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                innerMatch = text.match(INNER_EXPRESSION);\n                if (!innerMatch) return [3 /*break*/, 4];\n                _a = innerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];\n                return [5 /*yield**/, __values(innerParse(pre))];\n            case 1:\n                _b.sent();\n                return [4 /*yield*/, new Text(inner)];\n            case 2:\n                _b.sent();\n                return [4 /*yield*/, new Expression(post)];\n            case 3:\n                _b.sent();\n                return [3 /*break*/, 6];\n            case 4: return [4 /*yield*/, new Expression(text)];\n            case 5:\n                _b.sent();\n                _b.label = 6;\n            case 6: return [2 /*return*/];\n        }\n    });\n}\nfunction parseOuterMatch(outerMatch) {\n    var _a, pre, inner, post;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                if (!outerMatch) {\n                    return [2 /*return*/];\n                }\n                _a = outerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];\n                return [4 /*yield*/, new Text(pre)];\n            case 1:\n                _b.sent();\n                return [5 /*yield**/, __values(innerParse(inner))];\n            case 2:\n                _b.sent();\n                return [4 /*yield*/, new Text(post)];\n            case 3:\n                _b.sent();\n                return [2 /*return*/];\n        }\n    });\n}\nfunction parseInterpolation(text) {\n    var _i, _a, textOrExpr;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                _i = 0, _a = parseOuterMatch(text.match(OUTER_EXPRESSION));\n                _b.label = 1;\n            case 1:\n                if (!(_i < _a.length)) return [3 /*break*/, 4];\n                textOrExpr = _a[_i];\n                if (!textOrExpr.text) return [3 /*break*/, 3];\n                return [4 /*yield*/, textOrExpr];\n            case 2:\n                _b.sent();\n                _b.label = 3;\n            case 3:\n                _i++;\n                return [3 /*break*/, 1];\n            case 4: return [2 /*return*/];\n        }\n    });\n}\n\n/**\n * These are bindings that are mapped specific attributes, such as\n * two-way communication (value/checked) or which have anti-collision\n * properties (css).\n */\nvar DEFAULT_ATTRIBUTE_BINDING_MAP = {\n    value: 'value',\n    checked: 'checked',\n    \"class\": 'css'\n};\n/**\n *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>\n */\nvar AttributeMustacheProvider = /** @class */ (function (_super) {\n    __extends(AttributeMustacheProvider, _super);\n    function AttributeMustacheProvider(params) {\n        if (params === void 0) { params = {}; }\n        var _this = _super.call(this, params) || this;\n        _this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);\n        _this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;\n        return _this;\n    }\n    Object.defineProperty(AttributeMustacheProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    AttributeMustacheProvider.prototype.attributesToInterpolate = function (attributes) {\n        var _i, _a, attr;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _i = 0, _a = Array.from(attributes);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) {\n                        return [3 /*break*/, 3];\n                    }\n                    if (!(attr.specified && attr.value.includes('{{'))) return [3 /*break*/, 3];\n                    return [4 /*yield*/, attr];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.nodeHasBindings = function (node) {\n        return !this.attributesToInterpolate(node.attributes).next().done;\n    };\n    AttributeMustacheProvider.prototype.partsTogether = function (parts, context, node) {\n        var _this = this;\n        var valueToWrite = [];\n        for (var _i = 3; _i < arguments.length; _i++) {\n            valueToWrite[_i - 3] = arguments[_i];\n        }\n        if (parts.length > 1) {\n            return parts\n                .map(function (p) { return unwrap(p.asAttr(context, _this.globals, node)); }).join('');\n        }\n        // It may be a writeable observable e.g. value=\"{{ value }}\".\n        var part = parts[0].asAttr(context, this.globals);\n        if (valueToWrite.length) {\n            part(valueToWrite[0]);\n        }\n        return part;\n    };\n    AttributeMustacheProvider.prototype.attributeBinding = function (name, parts) {\n        return [name, parts];\n    };\n    AttributeMustacheProvider.prototype.bindingParts = function (node, context) {\n        var _i, _a, attr, parts;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _i = 0, _a = this.attributesToInterpolate(node.attributes);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    parts = Array.from(parseInterpolation(attr.value));\n                    if (!parts.length) return [3 /*break*/, 3];\n                    return [4 /*yield*/, this.attributeBinding(attr.name, parts)];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.getPossibleDirectBinding = function (attrName) {\n        var bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];\n        return bindingName && this.bindingHandlers.get(attrName);\n    };\n    AttributeMustacheProvider.prototype.bindingObjects = function (node, context) {\n        var _this = this;\n        var _loop_1, this_1, _i, _a, _b, attrName, parts;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _loop_1 = function (attrName, parts) {\n                        var bindingForAttribute, handler, accessorFn, _a;\n                        return __generator(this, function (_b) {\n                            switch (_b.label) {\n                                case 0:\n                                    bindingForAttribute = this_1.getPossibleDirectBinding(attrName);\n                                    handler = bindingForAttribute ? attrName : \"attr.\" + attrName;\n                                    accessorFn = bindingForAttribute\n                                        ? function () {\n                                            var v = [];\n                                            for (var _i = 0; _i < arguments.length; _i++) {\n                                                v[_i] = arguments[_i];\n                                            }\n                                            return _this.partsTogether.apply(_this, [parts, context, node].concat(v));\n                                        }\n                                        : function () {\n                                            var v = [];\n                                            for (var _i = 0; _i < arguments.length; _i++) {\n                                                v[_i] = arguments[_i];\n                                            }\n                                            return (_a = {}, _a[attrName] = _this.partsTogether.apply(_this, [parts, context, node].concat(v)), _a);\n                                            var _a;\n                                        };\n                                    node.removeAttribute(attrName);\n                                    return [4 /*yield*/, (_a = {}, _a[handler] = accessorFn, _a)];\n                                case 1:\n                                    _b.sent();\n                                    return [2 /*return*/];\n                            }\n                        });\n                    };\n                    this_1 = this;\n                    _i = 0, _a = this.bindingParts(node, context);\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    _b = _a[_i], attrName = _b[0], parts = _b[1];\n                    return [5 /*yield**/, _loop_1(attrName, parts)];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.getBindingAccessors = function (node, context) {\n        return Object.assign.apply(Object, [{}].concat(this.bindingObjects(node, context)));\n    };\n    return AttributeMustacheProvider;\n}(Provider));\n\n/**\n * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.\n *\n * This binding must come before the VirtualProvider.\n */\nvar TextMustacheProvider = /** @class */ (function (_super) {\n    __extends(TextMustacheProvider, _super);\n    function TextMustacheProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(TextMustacheProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [3]; } // document.TEXT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    TextMustacheProvider.prototype.textToNodes = function (textNode) {\n        var parent, isTextarea, hasStash, _i, _a, part;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    parent = textNode.parentNode;\n                    isTextarea = parent && parent.nodeName === 'TEXTAREA';\n                    hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');\n                    if (!hasStash || isTextarea) {\n                        return [2 /*return*/];\n                    }\n                    _i = 0, _a = parseInterpolation(textNode.nodeValue);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    part = _a[_i];\n                    return [5 /*yield**/, __values(part.textNodeReplacement(textNode))];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    TextMustacheProvider.prototype.textInterpolation = function (textNode) {\n        var newNodes = Array.from(this.textToNodes(textNode));\n        if (newNodes.length === 0) {\n            return;\n        }\n        if (textNode.parentNode) {\n            var parent = textNode.parentNode;\n            var n = newNodes.length;\n            for (var i = 0; i < n; ++i) {\n                parent.insertBefore(newNodes[i], textNode);\n            }\n            parent.removeChild(textNode);\n        }\n        return newNodes;\n    };\n    /**\n     * We convert as follows:\n     *\n     *   {{# ... }} into <!-- ko ... -->\n     *   {{/ ... }} into <!-- /ko -->\n     *   {{# ... /}} into <!-- ko ... --><!-- /ko -->\n     *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->\n     *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->\n     *\n     * VirtualProvider can then pick up and do the actual binding.\n     */\n    TextMustacheProvider.prototype.preprocessNode = function (node) {\n        return this.textInterpolation(node);\n    };\n    return TextMustacheProvider;\n}(Provider));\n\nexport { AttributeMustacheProvider, TextMustacheProvider, parseInterpolation };\n//# sourceMappingURL=tko.provider.mustache.js.map\n","import { addDisposeCallback, anyDomNodeIsAttachedToDocument, arrayForEach, arrayIndexOf, arrayMap, arrayPushAll, arrayRemoveItem, cleanNode, compareArrays, domData, extend, fixUpContinuousNodeArray, objectForEach, objectMap, options, removeNode, replaceDomNodes, tagNameLower, virtualElements } from 'tko.utils';\nimport { computed } from 'tko.computed';\nimport { dependencyDetection, isObservable, observable, unwrap } from 'tko.observable';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar storedBindingContextDomDataKey = domData.nextKey();\n// The bindingContext constructor is only called directly to create the root context. For child\n// contexts, use bindingContext.createChildContext or bindingContext.extend.\nfunction bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {\n    var self = this, isFunc = typeof (dataItemOrAccessor) == \"function\" && !isObservable(dataItemOrAccessor), nodes, subscribable;\n    // The binding context object includes static properties for the current, parent, and root view models.\n    // If a view model is actually stored in an observable, the corresponding binding context object, and\n    // any child contexts, must be updated when the view model is changed.\n    function updateContext() {\n        // Most of the time, the context will directly get a view model object, but if a function is given,\n        // we call the function to retrieve the view model. If the function accesses any observables or returns\n        // an observable, the dependency is tracked, and those observables can later cause the binding\n        // context to be updated.\n        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor, dataItem = unwrap(dataItemOrObservable);\n        if (parentContext) {\n            // When a \"parent\" context is given, register a dependency on the parent context. Thus whenever the\n            // parent context is updated, this context will also be updated.\n            if (parentContext._subscribable)\n                parentContext._subscribable();\n            // Copy $root and any custom properties from the parent context\n            extend(self, parentContext);\n            // Because the above copy overwrites our own properties, we need to reset them.\n            self._subscribable = subscribable;\n        }\n        else {\n            self.$parents = [];\n            self.$root = dataItem;\n            // Export 'ko' in the binding context so it will be available in bindings and templates\n            // even if 'ko' isn't exported as a global, such as when using an AMD loader.\n            // See https://github.com/SteveSanderson/knockout/issues/490\n            self.ko = options.knockoutInstance;\n        }\n        self.$rawData = dataItemOrObservable;\n        self.$data = dataItem;\n        if (dataItemAlias)\n            self[dataItemAlias] = dataItem;\n        // The extendCallback function is provided when creating a child context or extending a context.\n        // It handles the specific actions needed to finish setting up the binding context. Actions in this\n        // function could also add dependencies to this binding context.\n        if (extendCallback)\n            extendCallback(self, parentContext, dataItem);\n        return self.$data;\n    }\n    function disposeWhen() {\n        return nodes && !anyDomNodeIsAttachedToDocument(nodes);\n    }\n    if (settings && settings.exportDependencies) {\n        // The \"exportDependencies\" option means that the calling code will track any dependencies and re-create\n        // the binding context when they change.\n        updateContext();\n        return;\n    }\n    subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });\n    // At this point, the binding context has been initialized, and the \"subscribable\" computed observable is\n    // subscribed to any observables that were accessed in the process. If there is nothing to track, the\n    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in\n    // the context object.\n    if (subscribable.isActive()) {\n        self._subscribable = subscribable;\n        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed\n        subscribable.equalityComparer = null;\n        // We need to be able to dispose of this computed observable when it's no longer needed. This would be\n        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and\n        // we cannot assume that those nodes have any relation to each other. So instead we track any node that\n        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.\n        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates\n        nodes = [];\n        subscribable._addNode = function (node) {\n            nodes.push(node);\n            addDisposeCallback(node, function (node) {\n                arrayRemoveItem(nodes, node);\n                if (!nodes.length) {\n                    subscribable.dispose();\n                    self._subscribable = subscribable = undefined;\n                }\n            });\n        };\n    }\n}\nbindingContext.prototype.lookup = function (token, globals, node) {\n    // short circuits\n    switch (token) {\n        case '$element': return node;\n        case '$context': return this;\n        case 'this':\n        case '$data': return this.$data;\n    }\n    var $data = this.$data;\n    // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.\n    if ($data instanceof Object && token in $data) {\n        return $data[token];\n    }\n    if (token in this) {\n        return this[token];\n    }\n    if (token in globals) {\n        return globals[token];\n    }\n    throw new Error(\"The variable \\\"\" + token + \"\\\" was not found on $data, $context, or globals.\");\n};\n// Extend the binding context hierarchy with a new view model object. If the parent context is watching\n// any observables, the new child context will automatically get a dependency on the parent context.\n// But this does not mean that the $data value of the child context will also get updated. If the child\n// view model also depends on the parent view model, you must provide a function that returns the correct\n// view model on each update.\nbindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {\n    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function (self, parentContext) {\n        // Extend the context hierarchy by setting the appropriate pointers\n        self.$parentContext = parentContext;\n        self.$parent = parentContext.$data;\n        self.$parents = (parentContext.$parents || []).slice(0);\n        self.$parents.unshift(self.$parent);\n        if (extendCallback)\n            extendCallback(self);\n    }, settings);\n};\n// Extend the binding context with new custom properties. This doesn't change the context hierarchy.\n// Similarly to \"child\" contexts, provide a function here to make sure that the correct values are set\n// when an observable view model is updated.\nbindingContext.prototype.extend = function (properties) {\n    // If the parent context references an observable view model, \"_subscribable\" will always be the\n    // latest view model object. If not, \"_subscribable\" isn't set, and we can use the static \"$data\" value.\n    return new bindingContext(this._subscribable || this.$data, this, null, function (self, parentContext) {\n        // This \"child\" context doesn't directly track a parent observable view model,\n        // so we need to manually set the $rawData value to match the parent.\n        self.$rawData = parentContext.$rawData;\n        extend(self, typeof (properties) === \"function\" ? properties() : properties);\n    });\n};\nbindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {\n    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { \"exportDependencies\": true });\n};\nfunction storedBindingContextForNode(node, bindingContext) {\n    if (arguments.length == 2) {\n        domData.set(node, storedBindingContextDomDataKey, bindingContext);\n        if (bindingContext._subscribable)\n            bindingContext._subscribable._addNode(node);\n    }\n    else {\n        return domData.get(node, storedBindingContextDomDataKey);\n    }\n}\n// Retrieving binding context from arbitrary nodes\nfunction contextFor(node) {\n    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)\n    switch (node.nodeType) {\n        case 1:\n        case 8:\n            var context = storedBindingContextForNode(node);\n            if (context)\n                return context;\n            if (node.parentNode)\n                return contextFor(node.parentNode);\n            break;\n    }\n    return undefined;\n}\nfunction dataFor(node) {\n    var context = contextFor(node);\n    return context ? context.$data : undefined;\n}\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends$1(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\nvar BindingHandler = /** @class */ (function (_super) {\n    __extends$1(BindingHandler, _super);\n    function BindingHandler(params) {\n        var _this = _super.call(this) || this;\n        var $element = params.$element, valueAccessor = params.valueAccessor, allBindings = params.allBindings, $context = params.$context;\n        Object.assign(_this, {\n            valueAccessor: valueAccessor,\n            allBindings: allBindings,\n            $element: $element,\n            $context: $context,\n            $data: $context.$data\n        });\n        _this.anchorTo($element);\n        return _this;\n    }\n    Object.defineProperty(BindingHandler.prototype, \"value\", {\n        get: function () { return this.valueAccessor(); },\n        set: function (v) { return this.valueAccessor(v); },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler, \"allowVirtualElements\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler, \"isBindingHandlerClass\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler.prototype, \"bindingCompleted\", {\n        /* Overload this for asynchronous bindings or bindings that recursively\n           apply bindings (e.g. components, foreach, template).\n      \n           A binding should be complete when it has run through once, notably\n           in server-side bindings for pre-rendering.\n        */\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    BindingHandler.registerAs = function (name, provider) {\n        if (provider === void 0) { provider = options.bindingProviderInstance; }\n        provider.bindingHandlers.set(name, this);\n    };\n    return BindingHandler;\n}(LifeCycle));\n/**\n * An AsyncBindingHandler shall call `completeBinding` when the binding\n * is to be considered complete.\n */\nvar AsyncBindingHandler = /** @class */ (function (_super) {\n    __extends$1(AsyncBindingHandler, _super);\n    function AsyncBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        _this.bindingCompletion = new options.Promise(function (resolve) { _this.completeBinding = resolve; });\n        return _this;\n    }\n    Object.defineProperty(AsyncBindingHandler.prototype, \"bindingCompleted\", {\n        get: function () { return this.bindingCompletion; },\n        enumerable: true,\n        configurable: true\n    });\n    return AsyncBindingHandler;\n}(BindingHandler));\n\n/**\n * We have no guarantees, for users employing legacy bindings,\n * that it has not been changed with a modification like\n *\n *    ko.bindingHandlers[name] = { init: ...}\n *\n * ... so we have to keep track by way of a map.\n */\nvar PossibleWeakMap = options.global.WeakMap || Map;\nvar legacyBindingMap = new PossibleWeakMap();\nvar LegacyBindingHandler = /** @class */ (function (_super) {\n    __extends$1(LegacyBindingHandler, _super);\n    function LegacyBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        var handler = _this.handler;\n        if (typeof handler.dispose === 'function') {\n            _this.addDisposable(handler);\n        }\n        try {\n            _this.initReturn = handler.init && handler.init.apply(handler, _this.legacyArgs);\n        }\n        catch (e) {\n            params.onError('init', e);\n        }\n        if (typeof handler.update === 'function') {\n            _this.computed(function () {\n                try {\n                    handler.update.apply(handler, _this.legacyArgs);\n                }\n                catch (e) {\n                    params.onError('update', e);\n                }\n            });\n        }\n        return _this;\n    }\n    Object.defineProperty(LegacyBindingHandler.prototype, \"legacyArgs\", {\n        get: function () {\n            return [\n                this.$element, this.valueAccessor, this.allBindings,\n                this.$data, this.$context\n            ];\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(LegacyBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () {\n            var objectToTest = this.initReturn || this.handler || {};\n            return objectToTest.controlsDescendantBindings;\n        },\n        enumerable: true,\n        configurable: true\n    });\n    /**\n     * Create a handler instance from the `origin`, which may be:\n     *\n     * 1. an object (becomes LegacyBindingHandler)\n     * 2. a function (becomes LegacyBindingHandler with `init: function`)\n     *\n     * If given an object (the only kind supported in knockout 3.x and before), it\n     * shall draw the `init`, `update`, and `allowVirtualElements` properties\n     */\n    LegacyBindingHandler.getOrCreateFor = function (key, handler) {\n        if (legacyBindingMap.has(handler)) {\n            return legacyBindingMap.get(handler);\n        }\n        var newLegacyHandler = this.createFor(key, handler);\n        legacyBindingMap.set(handler, newLegacyHandler);\n        return newLegacyHandler;\n    };\n    LegacyBindingHandler.createFor = function (key, handler) {\n        if (typeof handler === 'function') {\n            var _a = [handler, handler.dispose], initFn_1 = _a[0], disposeFn_1 = _a[1];\n            return /** @class */ (function (_super) {\n                __extends$1(class_1, _super);\n                function class_1() {\n                    return _super !== null && _super.apply(this, arguments) || this;\n                }\n                Object.defineProperty(class_1.prototype, \"handler\", {\n                    get: function () {\n                        var init = initFn_1.bind(this);\n                        var dispose = disposeFn_1 ? disposeFn_1.bind(this) : null;\n                        return { init: init, dispose: dispose };\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_1, \"after\", {\n                    get: function () { return handler.after; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_1, \"allowVirtualElements\", {\n                    get: function () {\n                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                return class_1;\n            }(LegacyBindingHandler));\n        }\n        if (typeof handler === 'object') {\n            return /** @class */ (function (_super) {\n                __extends$1(class_2, _super);\n                function class_2() {\n                    return _super !== null && _super.apply(this, arguments) || this;\n                }\n                Object.defineProperty(class_2.prototype, \"handler\", {\n                    get: function () { return handler; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_2, \"after\", {\n                    get: function () { return handler.after; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_2, \"allowVirtualElements\", {\n                    get: function () {\n                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                return class_2;\n            }(LegacyBindingHandler));\n        }\n        throw new Error('The given handler is not an appropriate type.');\n    };\n    return LegacyBindingHandler;\n}(BindingHandler));\n\n/* eslint no-cond-assign: 0 */\n// The following element types will not be recursed into during binding.\nvar bindingDoesNotRecurseIntoElementTypes = {\n    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,\n    // because it's unexpected and a potential XSS issue.\n    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer\n    // and because such elements' contents are always intended to be bound in a different context\n    // from where they appear in the document.\n    'script': true,\n    'textarea': true,\n    'template': true\n};\n// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers\nfunction getBindingHandler(bindingKey) {\n    var handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);\n    if (!handler) {\n        return;\n    }\n    if (handler.isBindingHandlerClass) {\n        return handler;\n    }\n    return LegacyBindingHandler.getOrCreateFor(bindingKey, handler);\n}\n// Returns the valueAccesor function for a binding value\nfunction makeValueAccessor(value) {\n    return function () {\n        return value;\n    };\n}\n// Returns the value of a valueAccessor function\nfunction evaluateValueAccessor(valueAccessor) {\n    return valueAccessor();\n}\n// Given a function that returns bindings, create and return a new object that contains\n// binding value-accessors functions. Each accessor function calls the original function\n// so that it always gets the latest value and all dependencies are captured. This is used\n// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.\nfunction makeAccessorsFromFunction(callback) {\n    return objectMap(dependencyDetection.ignore(callback), function (value, key) {\n        return function () {\n            return callback()[key];\n        };\n    });\n}\n// Given a bindings function or object, create and return a new object that contains\n// binding value-accessors functions. This is used by ko.applyBindingsToNode.\nfunction makeBindingAccessors(bindings, context, node) {\n    if (typeof bindings === 'function') {\n        return makeAccessorsFromFunction(bindings.bind(null, context, node));\n    }\n    else {\n        return objectMap(bindings, makeValueAccessor);\n    }\n}\n// This function is used if the binding provider doesn't include a getBindingAccessors function.\n// It must be called with 'this' set to the provider instance.\nfunction getBindingsAndMakeAccessors(node, context) {\n    return makeAccessorsFromFunction(this.getBindings.bind(this, node, context));\n}\nfunction applyBindingsToDescendantsInternal(bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {\n    var currentChild;\n    var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n    var provider = options.bindingProviderInstance;\n    var preprocessNode = provider.preprocessNode;\n    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's\n    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to\n    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that\n    // trigger insertion of <template> contents at that point in the document.\n    if (preprocessNode) {\n        while (currentChild = nextInQueue) {\n            nextInQueue = virtualElements.nextSibling(currentChild);\n            preprocessNode.call(provider, currentChild);\n        }\n        // Reset nextInQueue for the next loop\n        nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n    }\n    while (currentChild = nextInQueue) {\n        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position\n        nextInQueue = virtualElements.nextSibling(currentChild);\n        applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);\n    }\n}\nfunction hasBindings(node) {\n    var provider = options.bindingProviderInstance;\n    return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node);\n}\nfunction applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Perf optimisation: Apply bindings only if...\n    // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)\n    //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those\n    // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)\n    var isElement = nodeVerified.nodeType === 1;\n    if (isElement) {\n        virtualElements.normaliseVirtualElementDomStructure(nodeVerified);\n    }\n    var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)\n        hasBindings(nodeVerified); // Case (2)\n    var shouldBindDescendants = (shouldApplyBindings\n        ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)\n        : { shouldBindDescendants: true }).shouldBindDescendants;\n    if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {\n        // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,\n        //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,\n        //    hence bindingContextsMayDifferFromDomParentElement is false\n        //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may\n        //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,\n        //    hence bindingContextsMayDifferFromDomParentElement is true\n        applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);\n    }\n}\nvar boundElementDomDataKey = domData.nextKey();\nfunction topologicalSortBindings(bindings) {\n    var results, bindingsConsidered, cyclicDependencyStack, _i, results_1, result;\n    return __generator(this, function (_a) {\n        switch (_a.label) {\n            case 0:\n                results = [];\n                bindingsConsidered = {} // A temporary record of which bindings are already in 'result'\n                ;\n                cyclicDependencyStack = [] // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it\n                ;\n                objectForEach(bindings, function pushBinding(bindingKey) {\n                    if (!bindingsConsidered[bindingKey]) {\n                        var binding = getBindingHandler(bindingKey);\n                        if (!binding) {\n                            return;\n                        }\n                        // First add dependencies (if any) of the current binding\n                        if (binding.after) {\n                            cyclicDependencyStack.push(bindingKey);\n                            arrayForEach(binding.after, function (bindingDependencyKey) {\n                                if (!bindings[bindingDependencyKey]) {\n                                    return;\n                                }\n                                if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {\n                                    throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '));\n                                }\n                                else {\n                                    pushBinding(bindingDependencyKey);\n                                }\n                            });\n                            cyclicDependencyStack.length--;\n                        }\n                        // Next add the current binding\n                        results.push([bindingKey, binding]);\n                    }\n                    bindingsConsidered[bindingKey] = true;\n                });\n                _i = 0, results_1 = results;\n                _a.label = 1;\n            case 1:\n                if (!(_i < results_1.length)) return [3 /*break*/, 4];\n                result = results_1[_i];\n                return [4 /*yield*/, result];\n            case 2:\n                _a.sent();\n                _a.label = 3;\n            case 3:\n                _i++;\n                return [3 /*break*/, 1];\n            case 4: return [2 /*return*/];\n        }\n    });\n}\nfunction applyBindingsToNodeInternal(node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified\n    var alreadyBound = domData.get(node, boundElementDomDataKey);\n    if (!sourceBindings) {\n        if (alreadyBound) {\n            onBindingError({\n                during: 'apply',\n                errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),\n                element: node,\n                bindingContext: bindingContext$$1\n            });\n            return false;\n        }\n        domData.set(node, boundElementDomDataKey, true);\n    }\n    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because\n    // we can easily recover it just by scanning up the node's ancestors in the DOM\n    // (note: here, parent node means \"real DOM parent\" not \"virtual parent\", as there's no O(1) way to find the virtual parent)\n    if (!alreadyBound && bindingContextMayDifferFromDomParentElement) {\n        storedBindingContextForNode(node, bindingContext$$1);\n    }\n    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings\n    var bindings;\n    if (sourceBindings && typeof sourceBindings !== 'function') {\n        bindings = sourceBindings;\n    }\n    else {\n        var provider_1 = options.bindingProviderInstance;\n        var getBindings_1 = provider_1.getBindingAccessors || getBindingsAndMakeAccessors;\n        if (provider_1.FOR_NODE_TYPES.includes(node.nodeType)) {\n            // Get the binding from the provider within a computed observable so that we can update the bindings whenever\n            // the binding context is updated or if the binding provider accesses observables.\n            var bindingsUpdater = computed(function () {\n                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings_1.call(provider_1, node, bindingContext$$1);\n                // Register a dependency on the binding context to support observable view models.\n                if (bindings && bindingContext$$1._subscribable) {\n                    bindingContext$$1._subscribable();\n                }\n                return bindings;\n            }, null, { disposeWhenNodeIsRemoved: node });\n            if (!bindings || !bindingsUpdater.isActive()) {\n                bindingsUpdater = null;\n            }\n        }\n    }\n    var bindingHandlerThatControlsDescendantBindings;\n    if (bindings) {\n        var allBindingHandlers = {};\n        domData.set(node, 'bindingHandlers', allBindingHandlers);\n        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding\n        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets\n        // the latest binding value and registers a dependency on the binding updater.\n        var getValueAccessor_1 = bindingsUpdater\n            ? function (bindingKey) { return function (optionalValue) {\n                var valueAccessor = bindingsUpdater()[bindingKey];\n                if (arguments.length === 0) {\n                    return evaluateValueAccessor(valueAccessor);\n                }\n                else {\n                    return valueAccessor(optionalValue);\n                }\n            }; } : function (bindingKey) { return bindings[bindingKey]; };\n        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated\n        function allBindings() {\n            return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);\n        }\n        // The following is the 3.x allBindings API\n        allBindings.has = function (key) { return key in bindings; };\n        allBindings.get = function (key) { return bindings[key] && evaluateValueAccessor(getValueAccessor_1(key)); };\n        var _loop_1 = function (key, BindingHandlerClass) {\n            // Go through the sorted bindings, calling init and update for each\n            function reportBindingError(during, errorCaptured) {\n                onBindingError({\n                    during: during,\n                    errorCaptured: errorCaptured,\n                    bindings: bindings,\n                    allBindings: allBindings,\n                    bindingKey: key,\n                    bindingContext: bindingContext$$1,\n                    element: node,\n                    valueAccessor: getValueAccessor_1(key)\n                });\n            }\n            if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {\n                throw new Error(\"The binding [\" + key + \"] cannot be used with virtual elements\");\n            }\n            try {\n                var bindingHandler = dependencyDetection.ignore(function () {\n                    return new BindingHandlerClass({\n                        allBindings: allBindings,\n                        $element: node,\n                        $context: bindingContext$$1,\n                        onError: reportBindingError,\n                        valueAccessor: function () {\n                            var v = [];\n                            for (var _i = 0; _i < arguments.length; _i++) {\n                                v[_i] = arguments[_i];\n                            }\n                            return getValueAccessor_1(key).apply(void 0, v);\n                        }\n                    });\n                });\n                // Expose the bindings via domData.\n                allBindingHandlers[key] = bindingHandler;\n                if (bindingHandler.controlsDescendants) {\n                    if (bindingHandlerThatControlsDescendantBindings !== undefined) {\n                        throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.');\n                    }\n                    bindingHandlerThatControlsDescendantBindings = key;\n                }\n                if (bindingHandler.bindingCompleted instanceof options.Promise) {\n                    asyncBindingsApplied.add(bindingHandler.bindingCompleted);\n                }\n            }\n            catch (err) {\n                reportBindingError('creation', err);\n            }\n        };\n        for (var _i = 0, _a = topologicalSortBindings(bindings); _i < _a.length; _i++) {\n            var _b = _a[_i], key = _b[0], BindingHandlerClass = _b[1];\n            _loop_1(key, BindingHandlerClass);\n        }\n    }\n    return {\n        shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined\n    };\n}\nfunction getBindingContext(viewModelOrBindingContext) {\n    return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)\n        ? viewModelOrBindingContext\n        : new bindingContext(viewModelOrBindingContext);\n}\nfunction applyBindingAccessorsToNode(node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {\n    if (node.nodeType === 1) {\n        virtualElements.normaliseVirtualElementDomStructure(node);\n    }\n    return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied);\n}\nfunction applyBindingsToNode(node, bindings, viewModelOrBindingContext) {\n    var asyncBindingsApplied = new Set();\n    var context = getBindingContext(viewModelOrBindingContext);\n    applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction applyBindingsToDescendants(viewModelOrBindingContext, rootNode) {\n    var asyncBindingsApplied = new Set();\n    if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {\n        applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n    }\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction applyBindings(viewModelOrBindingContext, rootNode) {\n    var asyncBindingsApplied = new Set();\n    // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.\n    if (!options.jQuery === undefined && options.jQuery) {\n        options.jQuery = options.jQuery;\n    }\n    if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) {\n        throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node');\n    }\n    rootNode = rootNode || options.document.body; // Make \"rootNode\" parameter optional\n    applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction onBindingError(spec) {\n    var error;\n    if (spec.bindingKey) {\n        // During: 'init' or initial 'update'\n        error = spec.errorCaptured;\n        spec.message = 'Unable to process binding \"' + spec.bindingKey +\n            '\" in binding \"' + spec.bindingKey +\n            '\"\\nMessage: ' + (error.message ? error.message : error);\n    }\n    else {\n        // During: 'apply'\n        error = spec.errorCaptured;\n    }\n    try {\n        extend(error, spec);\n    }\n    catch (e) {\n        // Read-only error e.g. a DOMEXception.\n        spec.stack = error.stack;\n        error = new Error(error.message ? error.message : error);\n        extend(error, spec);\n    }\n    options.onError(error);\n}\n\n/* eslint no-cond-assign: 0 */\n// Objective:\n// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,\n//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node\n// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node\n//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we\n//   previously mapped - retain those nodes, and just insert/delete other ones\n// \"callbackAfterAddingNodes\" will be invoked after any \"mapping\"-generated nodes are inserted into the container node\n// You can use this, for example, to activate bindings on those nodes.\nfunction mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {\n    // Map this array value inside a dependentObservable so we re-map when any dependency changes\n    var mappedNodes = [];\n    var dependentObservable = computed(function () {\n        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];\n        // On subsequent evaluations, just replace the previously-inserted DOM nodes\n        if (mappedNodes.length > 0) {\n            replaceDomNodes(mappedNodes, newMappedNodes);\n            if (callbackAfterAddingNodes)\n                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);\n        }\n        // Replace the contents of the mappedNodes array, thereby updating the record\n        // of which nodes would be deleted if valueToMap was itself later removed\n        mappedNodes.length = 0;\n        arrayPushAll(mappedNodes, newMappedNodes);\n    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function () { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });\n    return { mappedNodes: mappedNodes, dependentObservable: (dependentObservable.isActive() ? dependentObservable : undefined) };\n}\nvar lastMappingResultDomDataKey = domData.nextKey();\nvar deletedItemDummyValue = domData.nextKey();\nfunction setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {\n    // Compare the provided array against the previous one\n    array = array || [];\n    options$$1 = options$$1 || {};\n    var isFirstExecution = domData.get(domNode, lastMappingResultDomDataKey) === undefined;\n    var lastMappingResult = domData.get(domNode, lastMappingResultDomDataKey) || [];\n    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });\n    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);\n    // Build the new mapping result\n    var newMappingResult = [];\n    var lastMappingResultIndex = 0;\n    var newMappingResultIndex = 0;\n    var nodesToDelete = [];\n    var itemsToProcess = [];\n    var itemsForBeforeRemoveCallbacks = [];\n    var itemsForMoveCallbacks = [];\n    var itemsForAfterAddCallbacks = [];\n    var mapData;\n    function itemMovedOrRetained(editScriptIndex, oldPosition) {\n        mapData = lastMappingResult[oldPosition];\n        if (newMappingResultIndex !== oldPosition)\n            itemsForMoveCallbacks[editScriptIndex] = mapData;\n        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray\n        mapData.indexObservable(newMappingResultIndex++);\n        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);\n        newMappingResult.push(mapData);\n        itemsToProcess.push(mapData);\n    }\n    function callCallback(callback, items) {\n        if (callback) {\n            for (var i = 0, n = items.length; i < n; i++) {\n                if (items[i]) {\n                    arrayForEach(items[i].mappedNodes, function (node) {\n                        callback(node, i, items[i].arrayEntry);\n                    });\n                }\n            }\n        }\n    }\n    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {\n        movedIndex = editScriptItem['moved'];\n        switch (editScriptItem['status']) {\n            case \"deleted\":\n                if (movedIndex === undefined) {\n                    mapData = lastMappingResult[lastMappingResultIndex];\n                    // Stop tracking changes to the mapping for these nodes\n                    if (mapData.dependentObservable) {\n                        mapData.dependentObservable.dispose();\n                        mapData.dependentObservable = undefined;\n                    }\n                    // Queue these nodes for later removal\n                    if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {\n                        if (options$$1['beforeRemove']) {\n                            newMappingResult.push(mapData);\n                            itemsToProcess.push(mapData);\n                            if (mapData.arrayEntry === deletedItemDummyValue) {\n                                mapData = null;\n                            }\n                            else {\n                                itemsForBeforeRemoveCallbacks[i] = mapData;\n                            }\n                        }\n                        if (mapData) {\n                            nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);\n                        }\n                    }\n                }\n                lastMappingResultIndex++;\n                break;\n            case \"retained\":\n                itemMovedOrRetained(i, lastMappingResultIndex++);\n                break;\n            case \"added\":\n                if (movedIndex !== undefined) {\n                    itemMovedOrRetained(i, movedIndex);\n                }\n                else {\n                    mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };\n                    newMappingResult.push(mapData);\n                    itemsToProcess.push(mapData);\n                    if (!isFirstExecution)\n                        itemsForAfterAddCallbacks[i] = mapData;\n                }\n                break;\n        }\n    }\n    // Store a copy of the array items we just considered so we can difference it next time\n    domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);\n    // Call beforeMove first before any changes have been made to the DOM\n    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);\n    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)\n    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);\n    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)\n    i = 0;\n    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {\n        // Get nodes for newly added items\n        if (!mapData.mappedNodes)\n            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));\n        // Put nodes in the right place if they aren't there already\n        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {\n            if (node !== nextNode)\n                virtualElements.insertAfter(domNode, node, lastNode);\n        }\n        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)\n        if (!mapData.initialized && callbackAfterAddingNodes) {\n            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);\n            mapData.initialized = true;\n        }\n    }\n    // If there's a beforeRemove callback, call it after reordering.\n    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using\n    // some sort of animation, which is why we first reorder the nodes that will be removed. If the\n    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.\n    // Perhaps we'll make that change in the future if this scenario becomes more common.\n    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);\n    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item\n    // as already \"removed\" so we won't call beforeRemove for it again, and it ensures that the item won't match up\n    // with an actual item in the array and appear as \"retained\" or \"moved\".\n    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {\n        if (itemsForBeforeRemoveCallbacks[i]) {\n            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;\n        }\n    }\n    // Finally call afterMove and afterAdd callbacks\n    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);\n    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);\n}\n\nexport { BindingHandler, AsyncBindingHandler, bindingContext, storedBindingContextForNode, contextFor, dataFor, getBindingHandler, applyBindingAccessorsToNode, applyBindingsToNode, applyBindingsToDescendants, applyBindings, setDomNodeChildrenFromArrayMapping };\n//# sourceMappingURL=tko.bind.js.map\n","import { addOrRemoveItem, arrayFilter, arrayForEach, arrayGetDistinctValues, arrayIndexOf, arrayMap, arrayPushAll, createSymbolOrString, domData, ensureSelectElementIsRenderedCorrectly, ieVersion, makeArray, objectForEach, options, registerEventHandler, safeSetTimeout, setElementName, setHtml, setOptionNodeSelectionState, setTextContent, stringStartsWith, stringTrim, tagNameLower, toggleDomNodeCssClass, triggerEvent } from 'tko.utils';\nimport { dependencyDetection, isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed, pureComputed } from 'tko.computed';\nimport { applyBindingAccessorsToNode, applyBindingsToDescendants, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\n\nvar attr = {\n    update: function (element, valueAccessor, allBindings) {\n        var value = unwrap(valueAccessor()) || {};\n        objectForEach(value, function (attrName, attrValue) {\n            attrValue = unwrap(attrValue);\n            // Find the namespace of this attribute, if any.\n            // Defaulting to `null` should be ok, as\n            //\n            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )\n            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )\n            //\n            var prefixLen = attrName.indexOf(':');\n            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI(attrName.substr(0, prefixLen));\n            // To cover cases like \"attr: { checked:someProp }\", we want to remove the attribute entirely\n            // when someProp is a \"no value\"-like value (strictly null, false, or undefined)\n            // (because the absence of the \"checked\" attr is how to mark an element as not checked, etc.)\n            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);\n            if (toRemove) {\n                element.removeAttributeNS(namespace, attrName);\n            }\n            else {\n                element.setAttributeNS(namespace, attrName, attrValue.toString());\n            }\n            // Treat \"name\" specially - although you can think of it as an attribute, it also needs\n            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)\n            // Deliberately being case-sensitive here because XHTML would regard \"Name\" as a different thing\n            // entirely, and there's no strong reason to allow for such casing in HTML.\n            if (attrName === \"name\") {\n                setElementName(element, toRemove ? \"\" : attrValue.toString());\n            }\n        });\n    }\n};\n\nvar checked = {\n    after: ['value', 'attr'],\n    init: function (element, valueAccessor, allBindings) {\n        var checkedValue = pureComputed(function () {\n            // Treat \"value\" like \"checkedValue\" when it is included with \"checked\" binding\n            if (allBindings['has']('checkedValue')) {\n                return unwrap(allBindings.get('checkedValue'));\n            }\n            else if (allBindings['has']('value')) {\n                return unwrap(allBindings.get('value'));\n            }\n            return element.value;\n        });\n        function updateModel() {\n            // This updates the model value from the view value.\n            // It runs in response to DOM events (click) and changes in checkedValue.\n            var isChecked = element.checked, elemValue = useCheckedValue ? checkedValue() : isChecked;\n            // When we're first setting up this computed, don't change any model state.\n            if (dependencyDetection.isInitial()) {\n                return;\n            }\n            // We can ignore unchecked radio buttons, because some other radio\n            // button will be getting checked, and that one can take care of updating state.\n            if (isRadio && !isChecked) {\n                return;\n            }\n            var modelValue = dependencyDetection.ignore(valueAccessor);\n            if (valueIsArray) {\n                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;\n                if (oldElemValue !== elemValue) {\n                    // When we're responding to the checkedValue changing, and the element is\n                    // currently checked, replace the old elem value with the new elem value\n                    // in the model array.\n                    if (isChecked) {\n                        addOrRemoveItem(writableValue, elemValue, true);\n                        addOrRemoveItem(writableValue, oldElemValue, false);\n                    }\n                    oldElemValue = elemValue;\n                }\n                else {\n                    // When we're responding to the user having checked/unchecked a checkbox,\n                    // add/remove the element value to the model array.\n                    addOrRemoveItem(writableValue, elemValue, isChecked);\n                }\n                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {\n                    modelValue(writableValue);\n                }\n            }\n            else {\n                valueAccessor(elemValue, { onlyIfChanged: true });\n            }\n        }\n        \n        function updateView() {\n            // This updates the view value from the model value.\n            // It runs in response to changes in the bound (checked) value.\n            var modelValue = unwrap(valueAccessor());\n            if (valueIsArray) {\n                // When a checkbox is bound to an array, being checked represents its value being present in that array\n                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;\n            }\n            else if (isCheckbox) {\n                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish\n                element.checked = modelValue;\n            }\n            else {\n                // For radio buttons, being checked means that the radio button's value corresponds to the model value\n                element.checked = (checkedValue() === modelValue);\n            }\n        }\n        \n        var isCheckbox = element.type == \"checkbox\", isRadio = element.type == \"radio\";\n        // Only bind to check boxes and radio buttons\n        if (!isCheckbox && !isRadio) {\n            return;\n        }\n        var rawValue = valueAccessor(), valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array), rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice), oldElemValue = valueIsArray ? checkedValue() : undefined, useCheckedValue = isRadio || valueIsArray;\n        // Set up two computeds to update the binding:\n        // The first responds to changes in the checkedValue value and to element clicks\n        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });\n        registerEventHandler(element, \"click\", updateModel);\n        // The second responds to changes in the model value (the one associated with the checked binding)\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n        rawValue = undefined;\n    }\n};\nvar checkedValue = {\n    update: function (element, valueAccessor) {\n        element.value = unwrap(valueAccessor());\n    }\n};\n\n// For certain common events (currently just 'click'), allow a simplified data-binding syntax\n// e.g. click:handler instead of the usual full-length event:{click:handler}\nfunction makeEventHandlerShortcut(eventName) {\n    return {\n        init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n            var newValueAccessor = function () {\n                var result = {};\n                result[eventName] = valueAccessor();\n                return result;\n            };\n            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);\n        }\n    };\n}\nvar eventHandler = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var eventsToHandle = valueAccessor() || {};\n        objectForEach(eventsToHandle, function (eventName) {\n            if (typeof eventName == \"string\") {\n                registerEventHandler(element, eventName, function (event) {\n                    var handlerReturnValue;\n                    var handlerFunction = valueAccessor()[eventName];\n                    if (!handlerFunction)\n                        return;\n                    try {\n                        // Take all the event args, and prefix with the viewmodel\n                        var argsForHandler = makeArray(arguments);\n                        viewModel = bindingContext['$data'];\n                        argsForHandler.unshift(viewModel);\n                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);\n                    }\n                    finally {\n                        if (handlerReturnValue !== true) {\n                            if (event.preventDefault)\n                                event.preventDefault();\n                            else\n                                event.returnValue = false;\n                        }\n                    }\n                    var bubble = allBindings.get(eventName + 'Bubble') !== false;\n                    if (!bubble) {\n                        event.cancelBubble = true;\n                        if (event.stopPropagation)\n                            event.stopPropagation();\n                    }\n                });\n            }\n        });\n    }\n};\nvar onHandler = {\n    init: eventHandler.init,\n    preprocess: function (value, key, addBinding) {\n        addBinding(key.replace('on.', ''), '=>' + value);\n    }\n};\n\n// 'click' is just a shorthand for the usual full-length event:{click:handler}\nvar click = makeEventHandlerShortcut('click');\n\nvar css = {\n    aliases: ['class'],\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value !== null && typeof value == \"object\") {\n            objectForEach(value, function (className, shouldHaveClass) {\n                shouldHaveClass = unwrap(shouldHaveClass);\n                toggleDomNodeCssClass(element, className, shouldHaveClass);\n            });\n        }\n        else {\n            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value\n            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);\n            element[css.classesWrittenByBindingKey] = value;\n            toggleDomNodeCssClass(element, value, true);\n        }\n    },\n    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')\n};\n\nvar enable = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value && element.disabled) {\n            element.removeAttribute(\"disabled\");\n        }\n        else if ((!value) && (!element.disabled)) {\n            element.disabled = true;\n        }\n    }\n};\nvar disable = {\n    update: function (element, valueAccessor) {\n        enable.update(element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');\nvar hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');\nvar hasfocus = {\n    init: function (element, valueAccessor /*, allBindings */) {\n        var handleElementFocusChange = function (isFocused) {\n            // Where possible, ignore which event was raised and determine focus state using activeElement,\n            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.\n            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,\n            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus\n            // from calling 'blur()' on the element when it loses focus.\n            // Discussion at https://github.com/SteveSanderson/knockout/pull/352\n            element[hasfocusUpdatingProperty] = true;\n            var ownerDoc = element.ownerDocument;\n            if (\"activeElement\" in ownerDoc) {\n                var active;\n                try {\n                    active = ownerDoc.activeElement;\n                }\n                catch (e) {\n                    // IE9 throws if you access activeElement during page load (see issue #703)\n                    active = ownerDoc.body;\n                }\n                isFocused = (active === element);\n            }\n            // var modelValue = valueAccessor();\n            valueAccessor(isFocused, { onlyIfChanged: true });\n            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function\n            element[hasfocusLastValue] = isFocused;\n            element[hasfocusUpdatingProperty] = false;\n        };\n        var handleElementFocusIn = handleElementFocusChange.bind(null, true);\n        var handleElementFocusOut = handleElementFocusChange.bind(null, false);\n        registerEventHandler(element, \"focus\", handleElementFocusIn);\n        registerEventHandler(element, \"focusin\", handleElementFocusIn); // For IE\n        registerEventHandler(element, \"blur\", handleElementFocusOut);\n        registerEventHandler(element, \"focusout\", handleElementFocusOut); // For IE\n    },\n    update: function (element, valueAccessor) {\n        var value = !!unwrap(valueAccessor());\n        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {\n            value ? element.focus() : element.blur();\n            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).\n            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current\n            // element was focused already.\n            if (!value && element[hasfocusLastValue]) {\n                element.ownerDocument.body.focus();\n            }\n            // For IE, which doesn't reliably fire \"focus\" or \"blur\" events synchronously\n            dependencyDetection.ignore(triggerEvent, null, [element, value ? \"focusin\" : \"focusout\"]);\n        }\n    }\n};\n\nvar html = {\n    init: function () {\n        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)\n        return {\n            'controlsDescendantBindings': true\n        };\n    },\n    //\n    // Modify internal, per ko.punches and :\n    //      http://stackoverflow.com/a/15348139\n    update: function (element, valueAccessor) {\n        setHtml(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar $let = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        // Make a modified binding context, with extra properties, and apply it to descendant elements\n        var innerContext = bindingContext['extend'](valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { 'controlsDescendantBindings': true };\n    },\n    allowVirtualElements: true\n};\n\nvar hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';\n// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values\n// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values\n// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.\nvar selectExtensions = {\n    optionsValueDomDataKey: undefined,\n    readValue: function (element) {\n        switch (tagNameLower(element)) {\n            case 'option':\n                if (element[hasDomDataExpandoProperty] === true)\n                    return domData.get(element, selectExtensions.optionValueDomDataKey);\n                return element.value;\n            case 'select':\n                return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;\n            default:\n                return element.value;\n        }\n    },\n    writeValue: function (element, value, allowUnset) {\n        switch (tagNameLower(element)) {\n            case 'option':\n                switch (typeof value) {\n                    case \"string\":\n                        domData.set(element, selectExtensions.optionValueDomDataKey, undefined);\n                        if (hasDomDataExpandoProperty in element) {\n                            delete element[hasDomDataExpandoProperty];\n                        }\n                        element.value = value;\n                        break;\n                    default:\n                        // Store arbitrary object using DomData\n                        domData.set(element, selectExtensions.optionValueDomDataKey, value);\n                        element[hasDomDataExpandoProperty] = true;\n                        // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.\n                        element.value = typeof value === \"number\" ? value : \"\";\n                        break;\n                }\n                break;\n            case 'select':\n                if (value === \"\" || value === null)\n                    value = undefined;\n                var selection = -1;\n                for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {\n                    optionValue = selectExtensions.readValue(element.options[i]);\n                    // Include special check to handle selecting a caption with a blank string value\n                    if (optionValue == value || (optionValue === \"\" && value === undefined)) {\n                        selection = i;\n                        break;\n                    }\n                }\n                if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {\n                    element.selectedIndex = selection;\n                }\n                break;\n            default:\n                if ((value === null) || (value === undefined))\n                    value = \"\";\n                element.value = value;\n                break;\n        }\n    }\n};\n\nvar captionPlaceholder = {};\nvar options$1 = {\n    init: function (element) {\n        if (tagNameLower(element) !== \"select\")\n            throw new Error(\"options binding applies only to SELECT elements\");\n        // Remove all existing <option>s.\n        while (element.length > 0) {\n            element.remove(0);\n        }\n        // Ensures that the binding processor doesn't try to bind the options\n        return { 'controlsDescendantBindings': true };\n    },\n    update: function (element, valueAccessor, allBindings) {\n        function selectedOptions() {\n            return arrayFilter(element.options, function (node) { return node.selected; });\n        }\n        var selectWasPreviouslyEmpty = element.length == 0, multiple = element.multiple, previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null, unwrappedArray = unwrap(valueAccessor()), valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'), includeDestroyed = allBindings.get('optionsIncludeDestroyed'), arrayToDomNodeChildrenOptions = {}, captionValue, filteredArray, previousSelectedValues = [];\n        if (!valueAllowUnset) {\n            if (multiple) {\n                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);\n            }\n            else if (element.selectedIndex >= 0) {\n                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));\n            }\n        }\n        if (unwrappedArray) {\n            if (typeof unwrappedArray.length == \"undefined\")\n                unwrappedArray = [unwrappedArray];\n            // Filter out any entries marked as destroyed\n            filteredArray = arrayFilter(unwrappedArray, function (item) {\n                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);\n            });\n            // If caption is included, add it to the array\n            if (allBindings['has']('optionsCaption')) {\n                captionValue = unwrap(allBindings.get('optionsCaption'));\n                // If caption value is null or undefined, don't show a caption\n                if (captionValue !== null && captionValue !== undefined) {\n                    filteredArray.unshift(captionPlaceholder);\n                }\n            }\n        }\n        else {\n            // If a falsy value is provided (e.g. null), we'll simply empty the select element\n        }\n        function applyToObject(object, predicate, defaultValue) {\n            var predicateType = typeof predicate;\n            if (predicateType == \"function\")\n                return predicate(object);\n            else if (predicateType == \"string\")\n                return object[predicate];\n            else\n                return defaultValue;\n        }\n        // The following functions can run at two different times:\n        // The first is when the whole array is being updated directly from this binding handler.\n        // The second is when an observable value for a specific array entry is updated.\n        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.\n        var itemUpdate = false;\n        function optionForArrayItem(arrayEntry, index, oldOptions) {\n            if (oldOptions.length) {\n                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [selectExtensions.readValue(oldOptions[0])] : [];\n                itemUpdate = true;\n            }\n            var option = element.ownerDocument.createElement(\"option\");\n            if (arrayEntry === captionPlaceholder) {\n                setTextContent(option, allBindings.get('optionsCaption'));\n                selectExtensions.writeValue(option, undefined);\n            }\n            else {\n                // Apply a value to the option element\n                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);\n                selectExtensions.writeValue(option, unwrap(optionValue));\n                // Apply some text to the option element\n                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);\n                setTextContent(option, optionText);\n            }\n            return [option];\n        }\n        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection\n        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208\n        arrayToDomNodeChildrenOptions['beforeRemove'] =\n            function (option) {\n                element.removeChild(option);\n            };\n        function setSelectionCallback(arrayEntry, newOptions) {\n            if (itemUpdate && valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            }\n            else if (previousSelectedValues.length) {\n                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.\n                // That's why we first added them without selection. Now it's time to set the selection.\n                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;\n                setOptionNodeSelectionState(newOptions[0], isSelected);\n                // If this option was changed from being selected during a single-item update, notify the change\n                if (itemUpdate && !isSelected) {\n                    dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                }\n            }\n        }\n        var callback = setSelectionCallback;\n        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == \"function\") {\n            callback = function (arrayEntry, newOptions) {\n                setSelectionCallback(arrayEntry, newOptions);\n                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);\n            };\n        }\n        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);\n        dependencyDetection.ignore(function () {\n            if (valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            }\n            else {\n                // Determine if the selection has changed as a result of updating the options list\n                var selectionChanged;\n                if (multiple) {\n                    // For a multiple-select box, compare the new selection count to the previous one\n                    // But if nothing was selected before, the selection can't have changed\n                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;\n                }\n                else {\n                    // For a single-select box, compare the current value to the previous value\n                    // But if nothing was selected before or nothing is selected now, just look for a change in selection\n                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)\n                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])\n                        : (previousSelectedValues.length || element.selectedIndex >= 0);\n                }\n                // Ensure consistency between model value and selected option.\n                // If the dropdown was changed so that selection is no longer the same,\n                // notify the value or selectedOptions binding.\n                if (selectionChanged) {\n                    triggerEvent(element, \"change\");\n                }\n            }\n        });\n        // Workaround for IE bug\n        ensureSelectElementIsRenderedCorrectly(element);\n        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)\n            element.scrollTop = previousScrollTop;\n    }\n};\nselectExtensions.optionValueDomDataKey = domData.nextKey();\n\nvar selectedOptions = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        registerEventHandler(element, \"change\", function () {\n            var value = valueAccessor(), valueToWrite = [];\n            arrayForEach(element.getElementsByTagName(\"option\"), function (node) {\n                if (node.selected)\n                    valueToWrite.push(selectExtensions.readValue(node));\n            });\n            valueAccessor(valueToWrite);\n        });\n    },\n    update: function (element, valueAccessor) {\n        if (tagNameLower(element) != \"select\")\n            throw new Error(\"values binding applies only to SELECT elements\");\n        var newValue = unwrap(valueAccessor()), previousScrollTop = element.scrollTop;\n        if (newValue && typeof newValue.length == \"number\") {\n            arrayForEach(element.getElementsByTagName(\"option\"), function (node) {\n                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;\n                if (node.selected != isSelected) {\n                    setOptionNodeSelectionState(node, isSelected);\n                }\n            });\n        }\n        element.scrollTop = previousScrollTop;\n    }\n};\n\nvar style = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor() || {});\n        objectForEach(value, function (styleName, styleValue) {\n            styleValue = unwrap(styleValue);\n            if (styleValue === null || styleValue === undefined || styleValue === false) {\n                // Empty string removes the value, whereas null/undefined have no effect\n                styleValue = \"\";\n            }\n            element.style[styleName] = styleValue;\n        });\n    }\n};\n\nvar submit = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        if (typeof valueAccessor() != \"function\")\n            throw new Error(\"The value for a submit binding must be a function\");\n        registerEventHandler(element, \"submit\", function (event) {\n            var handlerReturnValue;\n            var value = valueAccessor();\n            try {\n                handlerReturnValue = value.call(bindingContext['$data'], element);\n            }\n            finally {\n                if (handlerReturnValue !== true) {\n                    if (event.preventDefault)\n                        event.preventDefault();\n                    else\n                        event.returnValue = false;\n                }\n            }\n        });\n    }\n};\n\nvar text = {\n    init: function () {\n        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).\n        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.\n        return { controlsDescendantBindings: true };\n    },\n    update: function (element, valueAccessor) {\n        setTextContent(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar parseVersion;\nvar operaVersion;\nvar userAgent;\nvar safariVersion;\nvar firefoxVersion;\nvar w = options.global;\nif (w.navigator) {\n    parseVersion = function (matches) {\n        if (matches) {\n            return parseFloat(matches[1]);\n        }\n    };\n    // Detect various browser versions because some old versions don't fully support the 'input' event\n    operaVersion = w.opera && w.opera.version && parseInt(w.opera.version()),\n        userAgent = w.navigator.userAgent,\n        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\\/([^ ]*) safari/i)),\n        firefoxVersion = parseVersion(userAgent.match(/Firefox\\/([^ ]*)/));\n}\n// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.\n// But it does fire the 'selectionchange' event on many of those, presumably because the\n// cursor is moving and that counts as the selection changing. The 'selectionchange' event is\n// fired at the document level only and doesn't directly indicate which element changed. We\n// set up just one event handler for the document and use 'activeElement' to determine which\n// element was changed.\nif (ieVersion < 10) {\n    var selectionChangeRegisteredName = domData.nextKey(), selectionChangeHandlerName = domData.nextKey();\n    var selectionChangeHandler = function (event) {\n        var target = this.activeElement, handler = target && domData.get(target, selectionChangeHandlerName);\n        if (handler) {\n            handler(event);\n        }\n    };\n    var registerForSelectionChangeEvent = function (element, handler) {\n        var ownerDoc = element.ownerDocument;\n        if (!domData.get(ownerDoc, selectionChangeRegisteredName)) {\n            domData.set(ownerDoc, selectionChangeRegisteredName, true);\n            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);\n        }\n        domData.set(element, selectionChangeHandlerName, handler);\n    };\n}\nvar textInput = {\n    aliases: 'textinput',\n    init: function (element, valueAccessor) {\n        var previousElementValue = element.value, timeoutHandle, elementValueBeforeEvent;\n        var updateModel = function (event) {\n            clearTimeout(timeoutHandle);\n            elementValueBeforeEvent = timeoutHandle = undefined;\n            var elementValue = element.value;\n            if (previousElementValue !== elementValue) {\n                // Provide a way for tests to know exactly which event was processed\n                if (options.debug && event)\n                    element['_ko_textInputProcessedEvent'] = event.type;\n                previousElementValue = elementValue;\n                valueAccessor(elementValue);\n            }\n        };\n        var deferUpdateModel = function (event) {\n            if (!timeoutHandle) {\n                // The elementValueBeforeEvent variable is set *only* during the brief gap between an\n                // event firing and the updateModel function running. This allows us to ignore model\n                // updates that are from the previous state of the element, usually due to techniques\n                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.\n                elementValueBeforeEvent = element.value;\n                var handler = options.debug ? updateModel.bind(element, { type: event.type }) : updateModel;\n                timeoutHandle = safeSetTimeout(handler, 4);\n            }\n        };\n        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);\n        // so we'll make sure all updates are asynchronous\n        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;\n        var updateView = function () {\n            var modelValue = unwrap(valueAccessor());\n            if (modelValue === null || modelValue === undefined) {\n                modelValue = '';\n            }\n            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateView, 4);\n                return;\n            }\n            // Update the element only if the element and model are different. On some browsers, updating the value\n            // will move the cursor to the end of the input, which would be bad while the user is typing.\n            if (element.value !== modelValue) {\n                previousElementValue = modelValue; // Make sure we ignore events (propertychange) that result from updating the value\n                element.value = modelValue;\n            }\n        };\n        var onEvent = function (event, handler) {\n            registerEventHandler(element, event, handler);\n        };\n        if (options.debug && textInput._forceUpdateOn) {\n            // Provide a way for tests to specify exactly which events are bound\n            arrayForEach(textInput._forceUpdateOn, function (eventName) {\n                if (eventName.slice(0, 5) == 'after') {\n                    onEvent(eventName.slice(5), deferUpdateModel);\n                }\n                else {\n                    onEvent(eventName, updateModel);\n                }\n            });\n        }\n        else {\n            if (ieVersion < 10) {\n                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever\n                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,\n                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it\n                // when using autocomplete, we'll use 'propertychange' for it also.\n                onEvent('propertychange', function (event) {\n                    if (event.propertyName === 'value') {\n                        ieUpdateModel(event);\n                    }\n                });\n                if (ieVersion == 8) {\n                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from\n                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following\n                    // events too.\n                    onEvent('keyup', updateModel); // A single keystoke\n                    onEvent('keydown', updateModel); // The first character when a key is held down\n                }\n                if (ieVersion >= 8) {\n                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using\n                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text\n                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'\n                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.\n                    // These are also needed in IE8 because of the bug described above.\n                    registerForSelectionChangeEvent(element, ieUpdateModel); // 'selectionchange' covers cut, paste, drop, delete, etc.\n                    onEvent('dragend', deferUpdateModel);\n                }\n            }\n            else {\n                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed\n                // through the user interface.\n                onEvent('input', updateModel);\n                if (safariVersion < 5 && tagNameLower(element) === \"textarea\") {\n                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'\n                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.\n                    onEvent('keydown', deferUpdateModel);\n                    onEvent('paste', deferUpdateModel);\n                    onEvent('cut', deferUpdateModel);\n                }\n                else if (operaVersion < 11) {\n                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.\n                    // We can try to catch some of those using 'keydown'.\n                    onEvent('keydown', deferUpdateModel);\n                }\n                else if (firefoxVersion < 4.0) {\n                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete\n                    onEvent('DOMAutoComplete', updateModel);\n                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.\n                    onEvent('dragdrop', updateModel); // <3.5\n                    onEvent('drop', updateModel); // 3.5\n                }\n            }\n        }\n        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.\n        onEvent('change', updateModel);\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n// // textinput is an alias for textInput\n// ko.bindingHandlers['textinput'] = {\n//     // preprocess is the only way to set up a full alias\n//     'preprocess': function (value, name, addBinding) {\n//         addBinding('textInput', value);\n//     }\n// };\n\nvar uniqueName = {\n    init: function (element, valueAccessor) {\n        if (valueAccessor()) {\n            var name = \"ko_unique_\" + (++uniqueName.currentIndex);\n            setElementName(element, name);\n        }\n    },\n    currentIndex: 0\n};\n\nvar value = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit\n        if (element.tagName.toLowerCase() == \"input\" && (element.type == \"checkbox\" || element.type == \"radio\")) {\n            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });\n            return;\n        }\n        // Always catch \"change\" event; possibly other events too if asked\n        var eventsToCatch = [\"change\"];\n        var requestedEventsToCatch = allBindings.get(\"valueUpdate\");\n        var propertyChangedFired = false;\n        var elementValueBeforeEvent = null;\n        if (requestedEventsToCatch) {\n            if (typeof requestedEventsToCatch == \"string\")\n                requestedEventsToCatch = [requestedEventsToCatch];\n            arrayPushAll(eventsToCatch, requestedEventsToCatch);\n            eventsToCatch = arrayGetDistinctValues(eventsToCatch);\n        }\n        var valueUpdateHandler = function () {\n            elementValueBeforeEvent = null;\n            propertyChangedFired = false;\n            var modelValue = valueAccessor();\n            var elementValue = selectExtensions.readValue(element);\n            valueAccessor(elementValue);\n        };\n        // Workaround for https://github.com/SteveSanderson/knockout/issues/122\n        // IE doesn't fire \"change\" events on textboxes if the user selects a value from its autocomplete list\n        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == \"input\" && element.type == \"text\"\n            && element.autocomplete != \"off\" && (!element.form || element.form.autocomplete != \"off\");\n        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, \"propertychange\") == -1) {\n            registerEventHandler(element, \"propertychange\", function () { propertyChangedFired = true; });\n            registerEventHandler(element, \"focus\", function () { propertyChangedFired = false; });\n            registerEventHandler(element, \"blur\", function () {\n                if (propertyChangedFired) {\n                    valueUpdateHandler();\n                }\n            });\n        }\n        arrayForEach(eventsToCatch, function (eventName) {\n            // The syntax \"after<eventname>\" means \"run the handler asynchronously after the event\"\n            // This is useful, for example, to catch \"keydown\" events after the browser has updated the control\n            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)\n            var handler = valueUpdateHandler;\n            if (stringStartsWith(eventName, \"after\")) {\n                handler = function () {\n                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between\n                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen\n                    // at the earliest asynchronous opportunity. We store this temporary information so that\n                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,\n                    // we can overwrite that model value change with the value the user just typed. Otherwise,\n                    // techniques like rateLimit can trigger model changes at critical moments that will\n                    // override the user's inputs, causing keystrokes to be lost.\n                    elementValueBeforeEvent = selectExtensions.readValue(element);\n                    safeSetTimeout(valueUpdateHandler, 0);\n                };\n                eventName = eventName.substring(\"after\".length);\n            }\n            registerEventHandler(element, eventName, handler);\n        });\n        var updateFromModel = function () {\n            var newValue = unwrap(valueAccessor());\n            var elementValue = selectExtensions.readValue(element);\n            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateFromModel, 0);\n                return;\n            }\n            var valueHasChanged = (newValue !== elementValue);\n            if (valueHasChanged) {\n                if (tagNameLower(element) === \"select\") {\n                    var allowUnset = allBindings.get('valueAllowUnset');\n                    var applyValueAction = function () {\n                        selectExtensions.writeValue(element, newValue, allowUnset);\n                    };\n                    applyValueAction();\n                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {\n                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,\n                        // because you're not allowed to have a model value that disagrees with a visible UI selection.\n                        dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                    }\n                    else {\n                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread\n                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread\n                        // to apply the value as well.\n                        safeSetTimeout(applyValueAction, 0);\n                    }\n                }\n                else {\n                    selectExtensions.writeValue(element, newValue);\n                }\n            }\n        };\n        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\nvar visible = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        var isCurrentlyVisible = !(element.style.display == \"none\");\n        if (value && !isCurrentlyVisible)\n            element.style.display = \"\";\n        else if ((!value) && isCurrentlyVisible)\n            element.style.display = \"none\";\n    }\n};\nvar hidden = {\n    update: function (element, valueAccessor) {\n        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar using = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var innerContext = bindingContext.createChildContext(valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { controlsDescendantBindings: true };\n    },\n    allowVirtualElements: true\n};\n\nvar bindings = {\n    attr: attr,\n    checked: checked,\n    checkedValue: checkedValue,\n    click: click,\n    css: css, 'class': css,\n    enable: enable,\n    'event': eventHandler,\n    disable: disable,\n    hasfocus: hasfocus, hasFocus: hasfocus,\n    hidden: hidden,\n    html: html,\n    'let': $let,\n    on: onHandler,\n    options: options$1,\n    selectedOptions: selectedOptions,\n    style: style,\n    submit: submit,\n    text: text,\n    textInput: textInput,\n    textinput: textInput,\n    uniqueName: uniqueName,\n    using: using,\n    value: value,\n    visible: visible\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.core.js.map\n","import { dependencyDetection, isObservable, observable, peek, unwrap } from 'tko.observable';\nimport { arrayFilter, domData, domNodeIsAttachedToDocument, extend, fixUpContinuousNodeArray, ieVersion, makeArray, memoization, moveCleanedNodesToContainerElement, options, parseHtmlFragment, replaceDomNodes, setHtml, tagNameLower, virtualElements } from 'tko.utils';\nimport { AsyncBindingHandler, applyBindings, bindingContext, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\nimport { computed } from 'tko.computed';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving\n// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)\n//\n// Two are provided by default:\n//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element\n//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but\n//                                           without reading/writing the actual element text content, since it will be overwritten\n//                                           with the rendered template output.\n// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.\n// Template sources need to have the following functions:\n//   text() \t\t\t- returns the template text from your storage location\n//   text(value)\t\t- writes the supplied template text to your storage location\n//   data(key)\t\t\t- reads values stored using data(key, value) - see below\n//   data(key, value)\t- associates \"value\" with this template and the key \"key\". Is used to store information like \"isRewritten\".\n//\n// Optionally, template sources can also have the following functions:\n//   nodes()            - returns a DOM element containing the nodes of this template, where available\n//   nodes(value)       - writes the given DOM element to your storage location\n// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()\n// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().\n//\n// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were\n// using and overriding \"makeTemplateSource\" to return an instance of your custom template source.\n// ---- ko.templateSources.domElement -----\n// template types\nvar templateScript = 1;\nvar templateTextArea = 2;\nvar templateTemplate = 3;\nvar templateElement = 4;\nfunction domElement(element) {\n    this.domElement = element;\n    if (!element) {\n        return;\n    }\n    var tagNameLower$$1 = tagNameLower(element);\n    this.templateType =\n        tagNameLower$$1 === \"script\" ? templateScript :\n            tagNameLower$$1 === \"textarea\" ? templateTextArea :\n                // For browsers with proper <template> element support, where the .content property gives a document fragment\n                tagNameLower$$1 == \"template\" && element.content && element.content.nodeType === 11 ? templateTemplate :\n                    templateElement;\n}\ndomElement.prototype.text = function () {\n    var elemContentsProperty = this.templateType === templateScript ? \"text\"\n        : this.templateType === templateTextArea ? \"value\"\n            : \"innerHTML\";\n    if (arguments.length == 0) {\n        return this.domElement[elemContentsProperty];\n    }\n    else {\n        var valueToWrite = arguments[0];\n        if (elemContentsProperty === \"innerHTML\")\n            setHtml(this.domElement, valueToWrite);\n        else\n            this.domElement[elemContentsProperty] = valueToWrite;\n    }\n};\nvar dataDomDataPrefix = domData.nextKey() + \"_\";\ndomElement.prototype.data = function (key /*, valueToWrite */) {\n    if (arguments.length === 1) {\n        return domData.get(this.domElement, dataDomDataPrefix + key);\n    }\n    else {\n        domData.set(this.domElement, dataDomDataPrefix + key, arguments[1]);\n    }\n};\nvar templatesDomDataKey = domData.nextKey();\nfunction getTemplateDomData(element) {\n    return domData.get(element, templatesDomDataKey) || {};\n}\nfunction setTemplateDomData(element, data) {\n    domData.set(element, templatesDomDataKey, data);\n}\ndomElement.prototype.nodes = function () {\n    var element = this.domElement;\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(element), containerData = templateData.containerData;\n        return containerData || (this.templateType === templateTemplate ? element.content :\n            this.templateType === templateElement ? element :\n                undefined);\n    }\n    else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(element, { containerData: valueToWrite });\n    }\n};\n// ---- ko.templateSources.anonymousTemplate -----\n// Anonymous templates are normally saved/retrieved as DOM nodes through \"nodes\".\n// For compatibility, you can also read \"text\"; it will be serialized from the nodes on demand.\n// Writing to \"text\" is still supported, but then the template data will not be available as DOM nodes.\nfunction anonymousTemplate(element) {\n    this.domElement = element;\n}\nanonymousTemplate.prototype = new domElement();\nanonymousTemplate.prototype.constructor = anonymousTemplate;\nanonymousTemplate.prototype.text = function () {\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(this.domElement);\n        if (templateData.textData === undefined && templateData.containerData)\n            templateData.textData = templateData.containerData.innerHTML;\n        return templateData.textData;\n    }\n    else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(this.domElement, { textData: valueToWrite });\n    }\n};\n\n// If you want to make a custom template engine,\n//\n// [1] Inherit from this class (like ko.nativeTemplateEngine does)\n// [2] Override 'renderTemplateSource', supplying a function with this signature:\n//\n//        function (templateSource, bindingContext, options) {\n//            // - templateSource.text() is the text of the template you should render\n//            // - bindingContext.$data is the data you should pass into the template\n//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,\n//            //     and bindingContext.$root available in the template too\n//            // - options gives you access to any other properties set on \"data-bind: { template: options }\"\n//            // - templateDocument is the document object of the template\n//            //\n//            // Return value: an array of DOM nodes\n//        }\n//\n// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:\n//\n//        function (script) {\n//            // Return value: Whatever syntax means \"Evaluate the JavaScript statement 'script' and output the result\"\n//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'\n//        }\n//\n//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.\n//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)\n//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.\nfunction templateEngine() { }\n\nextend(templateEngine.prototype, {\n    renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n        options$$1.onError(\"Override renderTemplateSource\");\n    },\n    createJavaScriptEvaluatorBlock: function (script) {\n        options.onError(\"Override createJavaScriptEvaluatorBlock\");\n    },\n    makeTemplateSource: function (template, templateDocument) {\n        // Named template\n        if (typeof template == \"string\") {\n            templateDocument = templateDocument || document;\n            var elem = templateDocument.getElementById(template);\n            if (!elem)\n                options.onError(\"Cannot find template with ID \" + template);\n            return new domElement(elem);\n        }\n        else if ((template.nodeType == 1) || (template.nodeType == 8)) {\n            // Anonymous template\n            return new anonymousTemplate(template);\n        }\n        else\n            options.onError(\"Unknown template type: \" + template);\n    },\n    renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {\n        var templateSource = this['makeTemplateSource'](template, templateDocument);\n        return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);\n    }\n});\n\nvar _templateEngine;\nfunction setTemplateEngine(tEngine) {\n    if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {\n        // TODO: ko.templateEngine to appropriate name\n        throw new Error('templateEngine must inherit from ko.templateEngine');\n    }\n    _templateEngine = tEngine;\n}\nfunction invokeForEachNodeInContinuousRange(firstNode, lastNode, action) {\n    var node;\n    var nextInQueue = firstNode;\n    var firstOutOfRangeNode = virtualElements.nextSibling(lastNode);\n    while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {\n        nextInQueue = virtualElements.nextSibling(node);\n        action(node, nextInQueue);\n    }\n}\nfunction activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext$$1, afterBindingCallback) {\n    // To be used on any nodes that have been rendered by a template and have been inserted into some parent element\n    // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because\n    // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,\n    // (1) Does a regular \"applyBindings\" to associate bindingContext with this node and to activate any non-memoized bindings\n    // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)\n    if (continuousNodeArray.length) {\n        var firstNode = continuousNodeArray[0];\n        var lastNode = continuousNodeArray[continuousNodeArray.length - 1];\n        var parentNode = firstNode.parentNode;\n        var provider = options.bindingProviderInstance;\n        var preprocessNode = provider.preprocessNode;\n        if (preprocessNode) {\n            invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {\n                var nodePreviousSibling = node.previousSibling;\n                var newNodes = preprocessNode.call(provider, node);\n                if (newNodes) {\n                    if (node === firstNode) {\n                        firstNode = newNodes[0] || nextNodeInRange;\n                    }\n                    if (node === lastNode) {\n                        lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling;\n                    }\n                }\n            });\n            // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.\n            // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real\n            // first node needs to be in the array).\n            continuousNodeArray.length = 0;\n            if (!firstNode) {\n                return;\n            }\n            if (firstNode === lastNode) {\n                continuousNodeArray.push(firstNode);\n            }\n            else {\n                continuousNodeArray.push(firstNode, lastNode);\n                fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n            }\n        }\n        // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)\n        // whereas a regular applyBindings won't introduce new memoized nodes\n        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n            if (node.nodeType === 1 || node.nodeType === 8) {\n                applyBindings(bindingContext$$1, node).then(afterBindingCallback);\n            }\n        });\n        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n            if (node.nodeType === 1 || node.nodeType === 8) {\n                memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]);\n            }\n        });\n        // Make sure any changes done by applyBindings or unmemoize are reflected in the array\n        fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n    }\n}\nfunction getFirstNodeFromPossibleArray(nodeOrNodeArray) {\n    return nodeOrNodeArray.nodeType ? nodeOrNodeArray\n        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]\n            : null;\n}\nfunction executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {\n    options$$1 = options$$1 || {};\n    var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n    var templateDocument = (firstTargetNode || template || {}).ownerDocument;\n    var templateEngineToUse = (options$$1.templateEngine || _templateEngine);\n    var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);\n    // Loosely check result is an array of DOM nodes\n    if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) {\n        throw new Error('Template engine must return an array of DOM nodes');\n    }\n    var haveAddedNodesToParent = false;\n    switch (renderMode) {\n        case 'replaceChildren':\n            virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);\n            haveAddedNodesToParent = true;\n            break;\n        case 'replaceNode':\n            replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);\n            haveAddedNodesToParent = true;\n            break;\n        case 'ignoreTargetNode': break;\n        default:\n            throw new Error('Unknown renderMode: ' + renderMode);\n    }\n    if (haveAddedNodesToParent) {\n        activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);\n        if (options$$1.afterRender) {\n            dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]);\n        }\n    }\n    return renderedNodesArray;\n}\nfunction resolveTemplateName(template, data, context) {\n    // The template can be specified as:\n    if (isObservable(template)) {\n        // 1. An observable, with string value\n        return template();\n    }\n    else if (typeof template === 'function') {\n        // 2. A function of (data, context) returning a string\n        return template(data, context);\n    }\n    else {\n        // 3. A string\n        return template;\n    }\n}\nfunction renderTemplate(template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {\n    options$$1 = options$$1 || {};\n    if ((options$$1.templateEngine || _templateEngine) === undefined) {\n        throw new Error('Set a template engine before calling renderTemplate');\n    }\n    renderMode = renderMode || 'replaceChildren';\n    if (targetNodeOrNodeArray) {\n        var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n        var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)\n        var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;\n        return computed(// So the DOM is automatically updated when any dependency changes\n        function () {\n            // Ensure we've got a proper binding context to work with\n            var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))\n                ? dataOrBindingContext\n                : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });\n            var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);\n            var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);\n            if (renderMode === 'replaceNode') {\n                targetNodeOrNodeArray = renderedNodesArray;\n                firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n            }\n        }, null, { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved });\n    }\n    else {\n        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node\n        return memoization.memoize(function (domNode) {\n            renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');\n        });\n    }\n}\nfunction renderTemplateForEach(template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {\n    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then\n    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.\n    var arrayItemContext;\n    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode\n    function executeTemplateForArrayItem(arrayValue, index) {\n        // Support selecting template as a function of the data being rendered\n        arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {\n            context['$index'] = index;\n        });\n        var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);\n        return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback);\n    }\n    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode\n    var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {\n        activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);\n        if (options$$1['afterRender']) {\n            options$$1['afterRender'](addedNodesArray, arrayValue);\n        }\n        // release the \"cache\" variable, so that it can be collected by\n        // the GC when its value isn't used from within the bindings anymore.\n        arrayItemContext = null;\n    };\n    return computed(function () {\n        var unwrappedArray = unwrap(arrayOrObservableArray) || [];\n        if (typeof unwrappedArray.length !== 'number') {\n            unwrappedArray = [unwrappedArray];\n        }\n        // Filter out any entries marked as destroyed\n        var filteredArray = arrayFilter(unwrappedArray, function (item) {\n            return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy']);\n        });\n        // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).\n        // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.\n        dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);\n    }, null, { disposeWhenNodeIsRemoved: targetNode });\n}\nvar templateComputedDomDataKey = domData.nextKey();\nvar TemplateBindingHandler = /** @class */ (function (_super) {\n    __extends(TemplateBindingHandler, _super);\n    function TemplateBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        var element = _this.$element;\n        var bindingValue = unwrap(_this.value);\n        var container;\n        // Expose 'conditional' for `else` chaining.\n        domData.set(element, 'conditional', {\n            elseChainSatisfied: observable(true)\n        });\n        // Support anonymous templates\n        if (typeof bindingValue === 'string' || bindingValue.name) {\n            // It's a named template - clear the element\n            virtualElements.emptyNode(element);\n        }\n        else if ('nodes' in bindingValue) {\n            // We've been given an array of DOM nodes. Save them as the template source.\n            // There is no known use case for the node array being an observable array (if the output\n            // varies, put that behavior *into* your template - that's what templates are for), and\n            // the implementation would be a mess, so assert that it's not observable.\n            var nodes = bindingValue.nodes || [];\n            if (isObservable(nodes)) {\n                throw new Error('The \"nodes\" option must be a plain, non-observable array.');\n            }\n            container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent\n            new anonymousTemplate(element)['nodes'](container);\n        }\n        else {\n            // It's an anonymous template - store the element contents, then clear the element\n            var templateNodes = virtualElements.childNodes(element);\n            container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent\n            new anonymousTemplate(element).nodes(container);\n        }\n        _this.computed(_this.onValueChange.bind(_this));\n        return _this;\n    }\n    TemplateBindingHandler.prototype.onValueChange = function () {\n        var element = this.$element;\n        var bindingContext$$1 = this.$context;\n        var value = this.value;\n        var options$$1 = unwrap(value);\n        var shouldDisplay = true;\n        var templateComputed = null;\n        var elseChainSatisfied = domData.get(element, 'conditional').elseChainSatisfied;\n        var templateName;\n        if (typeof options$$1 === 'string') {\n            templateName = value;\n            options$$1 = {};\n        }\n        else {\n            templateName = options$$1.name;\n            // Support \"if\"/\"ifnot\" conditions\n            if ('if' in options$$1) {\n                shouldDisplay = unwrap(options$$1[\"if\"]);\n            }\n            if (shouldDisplay && 'ifnot' in options$$1) {\n                shouldDisplay = !unwrap(options$$1.ifnot);\n            }\n        }\n        if ('foreach' in options$$1) {\n            // Render once for each data point (treating data set as empty if shouldDisplay==false)\n            var dataArray = (shouldDisplay && options$$1.foreach) || [];\n            templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);\n            elseChainSatisfied((unwrap(dataArray) || []).length !== 0);\n        }\n        else if (shouldDisplay) {\n            // Render once for this single data point (or use the viewModel if no data was provided)\n            var innerBindingContext = ('data' in options$$1)\n                ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as) // Given an explitit 'data' value, we create a child binding context for it\n                : bindingContext$$1; // Given no explicit 'data' value, we retain the same binding context\n            templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);\n            elseChainSatisfied(true);\n        }\n        else {\n            virtualElements.emptyNode(element);\n            elseChainSatisfied(false);\n        }\n        // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)\n        this.disposeOldComputedAndStoreNewOne(element, templateComputed);\n    };\n    TemplateBindingHandler.prototype.disposeOldComputedAndStoreNewOne = function (element, newComputed) {\n        var oldComputed = domData.get(element, templateComputedDomDataKey);\n        if (oldComputed && (typeof oldComputed.dispose === 'function')) {\n            oldComputed.dispose();\n        }\n        domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);\n    };\n    Object.defineProperty(TemplateBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(TemplateBindingHandler, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return TemplateBindingHandler;\n}(AsyncBindingHandler));\n\nfunction nativeTemplateEngine() {\n}\nnativeTemplateEngine.prototype = new templateEngine();\nnativeTemplateEngine.prototype.constructor = nativeTemplateEngine;\nnativeTemplateEngine.prototype.renderTemplateSource = function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly\n    templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null, templateNodes = templateNodesFunc ? templateSource.nodes() : null;\n    if (templateNodes) {\n        return makeArray(templateNodes.cloneNode(true).childNodes);\n    }\n    else {\n        var templateText = templateSource.text();\n        return parseHtmlFragment(templateText, templateDocument);\n    }\n};\nnativeTemplateEngine.instance = new nativeTemplateEngine();\nsetTemplateEngine(nativeTemplateEngine.instance);\n\n// \"foreach: someExpression\" is equivalent to \"template: { foreach: someExpression }\"\n// \"foreach: { data: someExpression, afterAdd: myfn }\" is equivalent to \"template: { foreach: someExpression, afterAdd: myfn }\"\nvar TemplateForEachBindingHandler = /** @class */ (function (_super) {\n    __extends(TemplateForEachBindingHandler, _super);\n    function TemplateForEachBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(TemplateForEachBindingHandler.prototype, \"value\", {\n        get: function () {\n            var modelValue = this.valueAccessor();\n            var unwrappedValue = peek(modelValue); // Unwrap without setting a dependency here\n            // If unwrappedValue is the array, pass in the wrapped value on its own\n            // The value will be unwrapped and tracked within the template binding\n            // (See https://github.com/SteveSanderson/knockout/issues/523)\n            if (!unwrappedValue || typeof unwrappedValue.length === 'number') {\n                return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance };\n            }\n            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates\n            unwrap(modelValue);\n            return {\n                foreach: unwrappedValue.data,\n                as: unwrappedValue.as,\n                includeDestroyed: unwrappedValue.includeDestroyed,\n                afterAdd: unwrappedValue.afterAdd,\n                beforeRemove: unwrappedValue.beforeRemove,\n                afterRender: unwrappedValue.afterRender,\n                beforeMove: unwrappedValue.beforeMove,\n                afterMove: unwrappedValue.afterMove,\n                templateEngine: nativeTemplateEngine.instance\n            };\n        },\n        enumerable: true,\n        configurable: true\n    });\n    return TemplateForEachBindingHandler;\n}(TemplateBindingHandler));\n\n//    'let': letBinding,\n//    template: template,\nvar bindings = {\n    foreach: TemplateForEachBindingHandler,\n    template: TemplateBindingHandler\n};\n\nexport { bindings, nativeTemplateEngine, templateEngine, setTemplateEngine, renderTemplate, TemplateBindingHandler, domElement, anonymousTemplate };\n//# sourceMappingURL=tko.binding.template.js.map\n","import { cleanNode, cloneNodes, domData, virtualElements } from 'tko.utils';\nimport { dependencyDetection, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n/**\n * Test a node for whether it represents an \"else\" condition.\n * @param  {HTMLElement}  node to be tested\n * @return {Boolean}      true when\n *\n * Matches <!-- else -->\n */\nfunction isElseNode(node) {\n    return node.nodeType === 8 &&\n        node.nodeValue.trim().toLowerCase() === 'else';\n}\nfunction detectElse(element) {\n    var children = virtualElements.childNodes(element);\n    for (var i = 0, j = children.length; i < j; ++i) {\n        if (isElseNode(children[i])) {\n            return true;\n        }\n    }\n    return false;\n}\n/**\n * Clone the nodes, returning `ifNodes`, `elseNodes`\n * @param  {HTMLElement} element The nodes to be cloned\n * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.\n * @return {object}         Containing the cloned nodes.\n */\nfunction cloneIfElseNodes(element, hasElse) {\n    var children = virtualElements.childNodes(element);\n    var ifNodes = [];\n    var elseNodes = [];\n    var target = ifNodes;\n    for (var i = 0, j = children.length; i < j; ++i) {\n        if (hasElse && isElseNode(children[i])) {\n            target = elseNodes;\n            hasElse = false;\n        }\n        else {\n            target.push(cleanNode(children[i].cloneNode(true)));\n        }\n    }\n    return { ifNodes: ifNodes, elseNodes: elseNodes };\n}\n/**\n * Create a DOMbinding that controls DOM nodes presence\n *\n * Covers e.g.\n *\n * 1. DOM Nodes contents\n *\n * <div data-bind='if: x'>\n * <!-- else --> ... an optional \"if\"\n * </div>\n *\n * 2. Virtual elements\n *\n * <!-- ko if: x -->\n * <!-- else -->\n * <!-- /ko -->\n *\n * 3. Else binding\n * <div data-bind='if: x'></div>\n * <div data-bind='else'></div>\n */\nvar ConditionalBindingHandler = /** @class */ (function (_super) {\n    __extends(ConditionalBindingHandler, _super);\n    function ConditionalBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        _this.hasElse = detectElse(_this.$element);\n        var elseChainSatisfied = _this.completesElseChain = observable();\n        domData.set(_this.$element, 'conditional', { elseChainSatisfied: elseChainSatisfied });\n        _this.computed(_this.render.bind(_this));\n        return _this;\n    }\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"elseChainIsAlreadySatisfied\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"needsRefresh\", {\n        get: function () {\n            return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate;\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return !!unwrap(this.value); },\n        enumerable: true,\n        configurable: true\n    });\n    ConditionalBindingHandler.prototype.getIfElseNodes = function () {\n        if (this.ifElseNodes) {\n            return this.ifElseNodes;\n        }\n        if (dependencyDetection.getDependenciesCount() || this.hasElse) {\n            return cloneIfElseNodes(this.$element, this.hasElse);\n        }\n    };\n    ConditionalBindingHandler.prototype.render = function () {\n        // Create any dependencies on values created in value-functions.\n        if (typeof this.value === 'function') {\n            this.value();\n        }\n        var isFirstRender = !this.ifElseNodes;\n        var shouldDisplayIf = this.shouldDisplayIf;\n        var needsRefresh = this.needsRefresh;\n        if (this.elseChainIsAlreadySatisfied) {\n            shouldDisplayIf = false;\n            needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;\n            this.completesElseChain(true);\n        }\n        else {\n            this.completesElseChain(this.shouldDisplayIf);\n        }\n        if (!needsRefresh) {\n            return;\n        }\n        this.ifElseNodes = this.getIfElseNodes();\n        if (shouldDisplayIf) {\n            if (!isFirstRender || this.hasElse) {\n                virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));\n            }\n        }\n        else if (this.ifElseNodes) {\n            virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));\n        }\n        else {\n            virtualElements.emptyNode(this.$element);\n        }\n        applyBindingsToDescendants(this.bindingContext, this.$element)\n            .then(this.completeBinding);\n        this.didDisplayOnLastUpdate = shouldDisplayIf;\n    };\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"bindingContext\", {\n        get: function () { return this.$context; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return ConditionalBindingHandler;\n}(AsyncBindingHandler));\nvar IfBindingHandler = /** @class */ (function (_super) {\n    __extends(IfBindingHandler, _super);\n    function IfBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    return IfBindingHandler;\n}(ConditionalBindingHandler));\nvar UnlessBindingHandler = /** @class */ (function (_super) {\n    __extends(UnlessBindingHandler, _super);\n    function UnlessBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(UnlessBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return !_super.prototype.shouldDisplayIf; },\n        enumerable: true,\n        configurable: true\n    });\n    return UnlessBindingHandler;\n}(ConditionalBindingHandler));\nvar ElseBindingHandler = /** @class */ (function (_super) {\n    __extends(ElseBindingHandler, _super);\n    function ElseBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ElseBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return _super.prototype.shouldDisplayIf || this.value === undefined; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ElseBindingHandler.prototype, \"elseChainIsAlreadySatisfied\", {\n        /**\n         * Return any conditional that precedes the given node.\n         * @return {object}      { elseChainSatisfied: observable }\n         */\n        get: function () {\n            if (!this._elseChain) {\n                this._elseChain = this.readElseChain();\n            }\n            return unwrap(this._elseChain.elseChainSatisfied);\n        },\n        enumerable: true,\n        configurable: true\n    });\n    ElseBindingHandler.prototype.readElseChain = function () {\n        var node = this.$element;\n        do {\n            node = node.previousSibling;\n        } while (node && node.nodeType !== 1 && node.nodeType !== 8);\n        if (!node) {\n            return false;\n        }\n        if (node.nodeType === 8) {\n            node = virtualElements.previousSibling(node);\n        }\n        return domData.get(node, 'conditional') || {};\n    };\n    return ElseBindingHandler;\n}(ConditionalBindingHandler));\nvar WithBindingHandler = /** @class */ (function (_super) {\n    __extends(WithBindingHandler, _super);\n    function WithBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(WithBindingHandler.prototype, \"needsRefresh\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(WithBindingHandler.prototype, \"bindingContext\", {\n        get: function () {\n            return this.$context.createStaticChildContext(this.value);\n        },\n        enumerable: true,\n        configurable: true\n    });\n    return WithBindingHandler;\n}(ConditionalBindingHandler));\n\nvar bindings = {\n    'if': IfBindingHandler,\n    'with': WithBindingHandler,\n    ifnot: UnlessBindingHandler,\n    unless: UnlessBindingHandler,\n    'else': ElseBindingHandler,\n    'elseif': ElseBindingHandler\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.if.js.map\n","import { arrayForEach, cleanNode, createSymbolOrString, domData, domNodeIsContainedBy, options, virtualElements } from 'tko.utils';\nimport { isObservable, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants, contextFor } from 'tko.bind';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// index.js\n// --------\n// Fast For Each\n//\n// Employing sound techniques to make a faster Knockout foreach binding.\n// --------\n//      Utilities\nvar MAX_LIST_SIZE = 9007199254740991;\n// from https://github.com/jonschlinkert/is-plain-object\nfunction isPlainObject(o) {\n    return !!o && typeof o === 'object' && o.constructor === Object;\n}\nvar supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';\n// Get a copy of the (possibly virtual) child nodes of the given element,\n// put them into a container, then empty the given node.\nfunction makeTemplateNode(sourceNode) {\n    var container = document.createElement('div');\n    var parentNode;\n    if (sourceNode.content) {\n        // For e.g. <template> tags\n        parentNode = sourceNode.content;\n    }\n    else if (sourceNode.tagName === 'SCRIPT') {\n        parentNode = document.createElement('div');\n        parentNode.innerHTML = sourceNode.text;\n    }\n    else {\n        // Anything else e.g. <div>\n        parentNode = sourceNode;\n    }\n    arrayForEach(virtualElements.childNodes(parentNode), function (child) {\n        // FIXME - This cloneNode could be expensive; we may prefer to iterate over the\n        // parentNode children in reverse (so as not to foul the indexes as childNodes are\n        // removed from parentNode when inserted into the container)\n        if (child) {\n            container.insertBefore(child.cloneNode(true), null);\n        }\n    });\n    return container;\n}\n// Mimic a KO change item 'add'\nfunction valueToChangeAddItem(value, index) {\n    return {\n        status: 'added',\n        value: value,\n        index: index\n    };\n}\n// store a symbol for caching the pending delete info index in the data item objects\nvar PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');\n// Extend the given context with a $index (passed in via the createChildContext)\nfunction extend$context(include$index, $context) {\n    if (include$index) {\n        $context.$index = observable();\n    }\n    $context.$list = this.data;\n}\nvar ForEachBinding = /** @class */ (function (_super) {\n    __extends(ForEachBinding, _super);\n    // NOTE: valid valueAccessors include:\n    //    []\n    //    observable([])\n    //    observableArray([])\n    //    computed\n    //    {data: array, name: string, as: string}\n    function ForEachBinding(params) {\n        var _this = _super.call(this, params) || this;\n        var settings = {};\n        if (isPlainObject(_this.value)) {\n            Object.assign(settings, _this.value);\n        }\n        _this.noIndex = settings.noIndex || _this.allBindings.get('noIndex');\n        _this.as = settings.as || _this.allBindings.get('as');\n        _this.data = settings.data || (unwrap(_this.$context.$rawData) === _this.value ? _this.$context.$rawData : _this.value);\n        _this.container = virtualElements.isStartComment(_this.$element)\n            ? _this.$element.parentNode : _this.$element;\n        _this.generateContext = _this.createContextGenerator(_this.as, !_this.noIndex);\n        if (_this.noIndex) {\n            _this.updateIndexes = false;\n        }\n        _this.templateNode = makeTemplateNode(settings.templateNode || (settings.name\n            ? document.getElementById(settings.name).cloneNode(true)\n            : _this.$element));\n        ['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']\n            .forEach(function (p) { _this[p] = settings[p] || _this.allBindings.get(p); });\n        _this.changeQueue = [];\n        _this.firstLastNodesList = [];\n        _this.indexesToDelete = [];\n        _this.rendering_queued = false;\n        _this.pendingDeletes = [];\n        // Expose the conditional so that if the `foreach` data is empty, successive\n        // 'else' bindings will appear.\n        _this.isNotEmpty = observable(Boolean(unwrap(_this.data).length));\n        domData.set(_this.$element, 'conditional', {\n            elseChainSatisfied: _this.isNotEmpty\n        });\n        // Remove existing content.\n        virtualElements.emptyNode(_this.$element);\n        // Prime content\n        var primeData = unwrap(_this.data);\n        if (primeData.map) {\n            _this.onArrayChange(primeData.map(valueToChangeAddItem), true);\n        }\n        else {\n            _this.completeBinding();\n        }\n        // Watch for changes\n        if (isObservable(_this.data)) {\n            if (!_this.data.indexOf) {\n                // Make sure the observable is trackable.\n                _this.data = _this.data.extend({ trackArrayChanges: true });\n            }\n            _this.changeSubs = _this.data.subscribe(_this.onArrayChange, _this, 'arrayChange');\n        }\n        return _this;\n    }\n    ForEachBinding.prototype.dispose = function () {\n        if (this.changeSubs) {\n            this.changeSubs.dispose();\n        }\n        this.flushPendingDeletes();\n    };\n    // If the array changes we register the change.\n    ForEachBinding.prototype.onArrayChange = function (changeSet, isInitial) {\n        var _this = this;\n        var changeMap = {\n            added: [],\n            deleted: []\n        };\n        // knockout array change notification index handling:\n        // - sends the original array indexes for deletes\n        // - sends the new array indexes for adds\n        // - sorts them all by index in ascending order\n        // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked\n        for (var i = 0, len = changeSet.length; i < len; i++) {\n            if (changeMap.added.length && changeSet[i].status === 'added') {\n                var lastAdd = changeMap.added[changeMap.added.length - 1];\n                var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;\n                if (lastIndex + 1 === changeSet[i].index) {\n                    if (!lastAdd.isBatch) {\n                        // transform the last addition into a batch addition object\n                        lastAdd = {\n                            isBatch: true,\n                            status: 'added',\n                            index: lastAdd.index,\n                            values: [lastAdd.value]\n                        };\n                        changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);\n                    }\n                    lastAdd.values.push(changeSet[i].value);\n                    continue;\n                }\n            }\n            changeMap[changeSet[i].status].push(changeSet[i]);\n        }\n        if (changeMap.deleted.length > 0) {\n            this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);\n            this.changeQueue.push({ status: 'clearDeletedIndexes' });\n        }\n        this.changeQueue.push.apply(this.changeQueue, changeMap.added);\n        // Once a change is registered, the ticking count-down starts for the processQueue.\n        if (this.changeQueue.length > 0 && !this.rendering_queued) {\n            this.rendering_queued = true;\n            if (isInitial) {\n                this.processQueue();\n            }\n            else {\n                ForEachBinding.animateFrame.call(window, function () { return _this.processQueue(); });\n            }\n        }\n    };\n    ForEachBinding.prototype.startQueueFlush = function () {\n        // Callback so folks can do things before the queue flush.\n        if (typeof this.beforeQueueFlush === 'function') {\n            this.beforeQueueFlush(this.changeQueue);\n        }\n    };\n    ForEachBinding.prototype.endQueueFlush = function () {\n        // Callback so folks can do things.\n        if (typeof this.afterQueueFlush === 'function') {\n            this.afterQueueFlush(this.changeQueue);\n        }\n    };\n    // Reflect all the changes in the queue in the DOM, then wipe the queue.\n    ForEachBinding.prototype.processQueue = function () {\n        var _this = this;\n        var isEmpty = !unwrap(this.data).length;\n        var lowestIndexChanged = MAX_LIST_SIZE;\n        this.startQueueFlush();\n        arrayForEach(this.changeQueue, function (changeItem) {\n            if (typeof changeItem.index === 'number') {\n                lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);\n            }\n            _this[changeItem.status](changeItem);\n        });\n        this.flushPendingDeletes();\n        this.rendering_queued = false;\n        // Update our indexes.\n        if (this.updateIndexes) {\n            this.updateIndexes(lowestIndexChanged);\n        }\n        this.endQueueFlush();\n        this.changeQueue = [];\n        // Update the conditional exposed on the domData\n        if (isEmpty !== !this.isNotEmpty()) {\n            this.isNotEmpty(!isEmpty);\n        }\n    };\n    /**\n     * Return a function that generates the context for a given node.\n     *\n     * We generate a single function that reduces our inner-loop calculations,\n     * which has a good chance of being optimized by the browser.\n     *\n     * @param  {string} as  The name given to each item in the list\n     * @param  {bool} index Whether to calculate indexes\n     * @return {function}   A function(dataValue) that returns the context\n     */\n    ForEachBinding.prototype.createContextGenerator = function (as, index) {\n        var $context = this.$context;\n        switch ((as && 1) | (index && 2)) {\n            case 0:// no-as & no-index\n                return function (v) {\n                    return $context.createChildContext(v, null, extend$context.bind(this, false));\n                };\n            case 1:// as + no-index\n                return function (v) {\n                    var obj = { $index: undefined, $list: this.data };\n                    obj[as] = v;\n                    return $context.extend(obj);\n                };\n            case 2:// no-as + index\n                return function (v) {\n                    return $context.createChildContext(v, null, extend$context.bind(this, true));\n                };\n            case 3:// as + index\n                return function (v) {\n                    var obj = { $index: observable(), $list: this.data };\n                    obj[as] = v;\n                    return $context.extend(obj);\n                };\n        }\n    };\n    // Process a changeItem with {status: 'added', ...}\n    ForEachBinding.prototype.added = function (changeItem) {\n        var index = changeItem.index;\n        var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];\n        var referenceElement = this.getLastNodeBeforeIndex(index);\n        // gather all childnodes for a possible batch insertion\n        var allChildNodes = [];\n        var asyncBindingResults = [];\n        var children;\n        for (var i = 0, len = valuesToAdd.length; i < len; ++i) {\n            // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset\n            var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);\n            if (pendingDelete && pendingDelete.nodesets.length) {\n                children = pendingDelete.nodesets.pop();\n            }\n            else {\n                var templateClone = this.templateNode.cloneNode(true);\n                // Apply bindings first, and then process child nodes,\n                // because bindings can add childnodes.\n                var bindingResult = applyBindingsToDescendants(this.generateContext(valuesToAdd[i]), templateClone);\n                asyncBindingResults.push(bindingResult);\n                children = virtualElements.childNodes(templateClone);\n            }\n            // Note discussion at https://github.com/angular/angular.js/issues/7851\n            allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));\n            this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });\n        }\n        if (typeof this.afterAdd === 'function') {\n            this.afterAdd({\n                nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),\n                foreachInstance: this\n            });\n        }\n        else {\n            this.insertAllAfter(allChildNodes, referenceElement);\n        }\n        this.completeBinding(options.Promise.all(asyncBindingResults));\n    };\n    ForEachBinding.prototype.getNodesForIndex = function (index) {\n        var result = [];\n        var ptr = this.firstLastNodesList[index].first;\n        var last = this.firstLastNodesList[index].last;\n        result.push(ptr);\n        while (ptr && ptr !== last) {\n            ptr = ptr.nextSibling;\n            result.push(ptr);\n        }\n        return result;\n    };\n    ForEachBinding.prototype.getLastNodeBeforeIndex = function (index) {\n        if (index < 1 || index - 1 >= this.firstLastNodesList.length) {\n            return null;\n        }\n        return this.firstLastNodesList[index - 1].last;\n    };\n    /**\n     * Get the active (focused) node, if it's a child of the given node.\n     */\n    ForEachBinding.prototype.activeChildElement = function (node) {\n        var active = document.activeElement;\n        if (domNodeIsContainedBy(active, node)) {\n            return active;\n        }\n    };\n    ForEachBinding.prototype.insertAllAfter = function (nodeOrNodeArrayToInsert, insertAfterNode) {\n        var frag;\n        var len;\n        var i;\n        var active = null;\n        var containerNode = this.$element;\n        // Poor man's node and array check.\n        if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {\n            throw new Error('Expected a single node or a node array');\n        }\n        if (nodeOrNodeArrayToInsert.nodeType !== undefined) {\n            active = this.activeChildElement(nodeOrNodeArrayToInsert);\n            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);\n            return [nodeOrNodeArrayToInsert];\n        }\n        else if (nodeOrNodeArrayToInsert.length === 1) {\n            active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);\n            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);\n        }\n        else if (supportsDocumentFragment) {\n            frag = document.createDocumentFragment();\n            for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {\n                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n                frag.appendChild(nodeOrNodeArrayToInsert[i]);\n            }\n            virtualElements.insertAfter(containerNode, frag, insertAfterNode);\n        }\n        else {\n            // Nodes are inserted in reverse order - pushed down immediately after\n            // the last node for the previous item or as the first node of element.\n            for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {\n                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n                var child = nodeOrNodeArrayToInsert[i];\n                if (!child) {\n                    break;\n                }\n                virtualElements.insertAfter(containerNode, child, insertAfterNode);\n            }\n        }\n        if (active) {\n            active.focus();\n        }\n        return nodeOrNodeArrayToInsert;\n    };\n    // checks if the deleted data item should be handled with delay for a possible reuse at additions\n    ForEachBinding.prototype.shouldDelayDeletion = function (data) {\n        return data && (typeof data === 'object' || typeof data === 'function');\n    };\n    // gets the pending deletion info for this data item\n    ForEachBinding.prototype.getPendingDeleteFor = function (data) {\n        var index = data && data[PENDING_DELETE_INDEX_SYM];\n        if (index === undefined)\n            return null;\n        return this.pendingDeletes[index];\n    };\n    // tries to find the existing pending delete info for this data item, and if it can't, it registeres one\n    ForEachBinding.prototype.getOrCreatePendingDeleteFor = function (data) {\n        var pd = this.getPendingDeleteFor(data);\n        if (pd) {\n            return pd;\n        }\n        pd = {\n            data: data,\n            nodesets: []\n        };\n        data[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;\n        this.pendingDeletes.push(pd);\n        return pd;\n    };\n    // Process a changeItem with {status: 'deleted', ...}\n    ForEachBinding.prototype.deleted = function (changeItem) {\n        // if we should delay the deletion of this data, we add the nodeset to the pending delete info object\n        if (this.shouldDelayDeletion(changeItem.value)) {\n            var pd = this.getOrCreatePendingDeleteFor(changeItem.value);\n            pd.nodesets.push(this.getNodesForIndex(changeItem.index));\n        }\n        else {\n            this.removeNodes(this.getNodesForIndex(changeItem.index));\n        }\n        this.indexesToDelete.push(changeItem.index);\n    };\n    // removes a set of nodes from the DOM\n    ForEachBinding.prototype.removeNodes = function (nodes) {\n        if (!nodes.length) {\n            return;\n        }\n        function removeFn() {\n            var parent = nodes[0].parentNode;\n            for (var i = nodes.length - 1; i >= 0; --i) {\n                cleanNode(nodes[i]);\n                parent.removeChild(nodes[i]);\n            }\n        }\n        if (this.beforeRemove) {\n            var beforeRemoveReturn = this.beforeRemove({\n                nodesToRemove: nodes, foreachInstance: this\n            }) || {};\n            // If beforeRemove returns a `then`–able e.g. a Promise, we remove\n            // the nodes when that thenable completes.  We pass any errors to\n            // ko.onError.\n            if (typeof beforeRemoveReturn.then === 'function') {\n                beforeRemoveReturn.then(removeFn, options.onError);\n            }\n        }\n        else {\n            removeFn();\n        }\n    };\n    // flushes the pending delete info store\n    // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up\n    // we also call it on dispose not to leave any mess\n    ForEachBinding.prototype.flushPendingDeletes = function () {\n        for (var i = 0, len = this.pendingDeletes.length; i !== len; ++i) {\n            var pd = this.pendingDeletes[i];\n            while (pd.nodesets.length) {\n                this.removeNodes(pd.nodesets.pop());\n            }\n            if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) {\n                delete pd.data[PENDING_DELETE_INDEX_SYM];\n            }\n        }\n        this.pendingDeletes = [];\n    };\n    // We batch our deletion of item indexes in our parallel array.\n    // See brianmhunt/knockout-fast-foreach#6/#8\n    ForEachBinding.prototype.clearDeletedIndexes = function () {\n        // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine\n        // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.\n        for (var i = this.indexesToDelete.length - 1; i >= 0; --i) {\n            this.firstLastNodesList.splice(this.indexesToDelete[i], 1);\n        }\n        this.indexesToDelete = [];\n    };\n    ForEachBinding.prototype.updateIndexes = function (fromIndex) {\n        var ctx;\n        for (var i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {\n            ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);\n            if (ctx) {\n                ctx.$index(i);\n            }\n        }\n    };\n    ForEachBinding.prototype.getContextStartingFrom = function (node) {\n        var ctx;\n        while (node) {\n            ctx = contextFor(node);\n            if (ctx) {\n                return ctx;\n            }\n            node = node.nextSibling;\n        }\n    };\n    /**\n     * Set whether the binding is always synchronous.\n     * Useful during testing.\n     */\n    ForEachBinding.setSync = function (toggle) {\n        var w = options.global;\n        if (toggle) {\n            ForEachBinding.animateFrame = function (frame) { frame(); };\n        }\n        else {\n            ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||\n                w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||\n                function (cb) { return w.setTimeout(cb, 1000 / 60); };\n        }\n    };\n    Object.defineProperty(ForEachBinding.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"ForEach\", {\n        /* TODO: Remove; for legacy/testing */\n        get: function () { return this; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"PENDING_DELETE_INDEX_SYM\", {\n        get: function () { return PENDING_DELETE_INDEX_SYM; },\n        enumerable: true,\n        configurable: true\n    });\n    return ForEachBinding;\n}(AsyncBindingHandler));\n\nvar bindings = {\n    foreach: ForEachBinding\n};\n// By default, foreach will be async.\nForEachBinding.setSync(false);\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.foreach.js.map\n","import { toJS, unwrap } from 'tko.observable';\n\nvar sproto = String.prototype;\nvar filters = {};\n// Convert value to uppercase\nfilters.uppercase = function (value) {\n    return sproto.toUpperCase.call(unwrap(value));\n};\n// Convert value to lowercase\nfilters.lowercase = function (value) {\n    return sproto.toLowerCase.call(unwrap(value));\n};\n// Return default value if the input value is empty or null\nfilters['default'] = function (value, defaultValue) {\n    value = unwrap(value);\n    if (typeof value === \"function\") {\n        return value;\n    }\n    if (typeof value === \"string\") {\n        return sproto.trim.call(value) === '' ? defaultValue : value;\n    }\n    return value == null || value.length == 0 ? defaultValue : value;\n};\n// Return the value with the search string replaced with the replacement string\nfilters.replace = function (value, search, replace) {\n    return sproto.replace.call(unwrap(value), search, replace);\n};\nfilters.fit = function (value, length, replacement, trimWhere) {\n    value = unwrap(value);\n    if (length && ('' + value).length > length) {\n        replacement = '' + (replacement || '...');\n        length = length - replacement.length;\n        value = '' + value;\n        switch (trimWhere) {\n            case 'left':\n                return replacement + value.slice(-length);\n            case 'middle':\n                var leftLen = Math.ceil(length / 2);\n                return value.substr(0, leftLen) + replacement + value.slice(leftLen - length);\n            default:\n                return value.substr(0, length) + replacement;\n        }\n    }\n    else {\n        return value;\n    }\n};\n// Convert a model object to JSON\nfilters.json = function (rootObject, space, replacer) {\n    // replacer and space are optional\n    return JSON.stringify(toJS(rootObject), replacer, space);\n};\n// Format a number using the browser's toLocaleString\nfilters.number = function (value) {\n    return (+unwrap(value)).toLocaleString();\n};\n\nexport { filters };\n//# sourceMappingURL=tko.filter.punches.js.map\n","import { cloneNodes, makeArray, virtualElements } from 'tko.utils';\nimport { unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\nimport { LifeCycle } from 'tko.lifecycle';\nimport registry from 'tko.utils.component';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n//\n// Binding Handler for Components\n//\nvar componentLoadingOperationUniqueId = 0;\nvar ComponentBinding = /** @class */ (function (_super) {\n    __extends(ComponentBinding, _super);\n    function ComponentBinding(params) {\n        var _this = _super.call(this, params) || this;\n        _this.originalChildNodes = makeArray(virtualElements.childNodes(_this.$element));\n        _this.computed('computeApplyComponent');\n        return _this;\n    }\n    ComponentBinding.prototype.cloneTemplateIntoElement = function (componentName, componentDefinition, element) {\n        var template = componentDefinition['template'];\n        if (!template) {\n            throw new Error('Component \\'' + componentName + '\\' has no template');\n        }\n        var clonedNodesArray = cloneNodes(template);\n        virtualElements.setDomNodeChildren(element, clonedNodesArray);\n    };\n    ComponentBinding.prototype.createViewModel = function (componentDefinition, element, originalChildNodes, componentParams) {\n        var componentViewModelFactory = componentDefinition.createViewModel;\n        return componentViewModelFactory\n            ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })\n            : componentParams; // Template-only component\n    };\n    ComponentBinding.prototype.computeApplyComponent = function () {\n        var _this = this;\n        var value = unwrap(this.value);\n        var componentName;\n        var componentParams;\n        if (typeof value === 'string') {\n            componentName = value;\n        }\n        else {\n            componentName = unwrap(value['name']);\n            componentParams = unwrap(value['params']);\n        }\n        this.latestComponentName = componentName;\n        if (!componentName) {\n            throw new Error('No component name specified');\n        }\n        this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;\n        registry.get(componentName, function (defn) { return _this.applyComponentDefinition(componentName, componentParams, defn); });\n    };\n    ComponentBinding.prototype.applyComponentDefinition = function (componentName, componentParams, componentDefinition) {\n        var _this = this;\n        // If this is not the current load operation for this element, ignore it.\n        if (this.currentLoadingOperationId !== this.loadingOperationId ||\n            this.latestComponentName !== componentName) {\n            return;\n        }\n        // Clean up previous state\n        this.cleanUpState();\n        var element = this.$element;\n        // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.\n        if (!componentDefinition) {\n            throw new Error('Unknown component \\'' + componentName + '\\'');\n        }\n        this.cloneTemplateIntoElement(componentName, componentDefinition, element);\n        var componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);\n        if (componentViewModel instanceof LifeCycle) {\n            componentViewModel.anchorTo(this.$element);\n        }\n        var ctxExtender = function (ctx) { return Object.assign(ctx, {\n            $component: componentViewModel,\n            $componentTemplateNodes: _this.originalChildNodes\n        }); };\n        var childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);\n        this.currentViewModel = componentViewModel;\n        applyBindingsToDescendants(childBindingContext, this.$element)\n            .then(this.completeBinding);\n    };\n    ComponentBinding.prototype.cleanUpState = function () {\n        var currentView = this.currentViewModel;\n        var currentViewDispose = currentView && currentView.dispose;\n        if (typeof currentViewDispose === 'function') {\n            currentViewDispose.call(currentView);\n        }\n        this.currentViewModel = null;\n        // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion\n        this.currentLoadingOperationId = null;\n    };\n    ComponentBinding.prototype.dispose = function () {\n        this.cleanUpState();\n        _super.prototype.dispose.call(this);\n    };\n    Object.defineProperty(ComponentBinding.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentBinding, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return ComponentBinding;\n}(AsyncBindingHandler));\n\nvar bindings = { component: ComponentBinding };\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.component.js.map\n","/* eslint semi: 0 */\nimport * as utils from 'tko.utils'\n\nimport {\n    // applyExtenders,\n    // arrayChangeEventName,\n    // deferUpdates,\n    dependencyDetection,\n    extenders,\n    isObservable,\n    isSubscribable,\n    isWriteableObservable,\n    observable,\n    observableArray,\n    peek,\n    subscribable,\n    toJS,\n    toJSON,\n    unwrap\n} from 'tko.observable'\n\nimport {\n    computed,\n    isComputed,\n    isPureComputed,\n    pureComputed\n} from 'tko.computed'\n\nimport { VirtualProvider } from 'tko.provider.virtual'\nimport { DataBindProvider } from 'tko.provider.databind'\nimport { ComponentProvider } from 'tko.provider.component'\nimport { AttributeProvider } from 'tko.provider.attr'\nimport { MultiProvider } from 'tko.provider.multi'\nimport {\n  TextMustacheProvider, AttributeMustacheProvider\n} from 'tko.provider.mustache'\n\nimport {\n    applyBindingAccessorsToNode,\n    applyBindings,\n    applyBindingsToDescendants,\n    applyBindingsToNode,\n    contextFor,\n    dataFor,\n    getBindingHandler,\n    BindingHandler,\n    AsyncBindingHandler,\n    setDomNodeChildrenFromArrayMapping\n} from 'tko.bind';\n\nimport {\n    bindings as coreBindings\n} from 'tko.binding.core';\n\nimport {\n    anonymousTemplate,\n    bindings as templateBindings,\n    domElement,\n    nativeTemplateEngine,\n    renderTemplate,\n    setTemplateEngine,\n    templateEngine\n    // templateSources\n} from 'tko.binding.template';\n\nimport {\n    bindings as ifBindings\n} from 'tko.binding.if';\n\nimport {\n    bindings as foreachBindings\n} from 'tko.binding.foreach';\n\nimport {\n  filters as punchesFilters\n} from 'tko.filter.punches';\n\nimport {\n  bindings as componentBindings\n} from 'tko.binding.component'\n\nimport components from 'tko.utils.component'\n\nvar coreUtils = {}\n\nutils.arrayForEach([\n  'extend',\n  'setTimeout',\n  'arrayForEach',\n  'arrayFirst',\n  'arrayFilter',\n  'arrayGetDistinctValues',\n  'arrayIndexOf',\n  'arrayMap',\n  'arrayPushAll',\n  'arrayRemoveItem',\n  'getFormFields',\n  'peekObservable',\n  'postJson',\n  'parseJson',\n  'registerEventHandler',\n  'stringifyJson',\n  'range',\n  'toggleDomNodeCssClass',\n  'triggerEvent',\n  'unwrapObservable',\n  'objectForEach',\n  'addOrRemoveItem',\n  'setTextContent',\n  'domData',\n  'parseHtmlFragment',\n  'setHtml',\n  'compareArrays',\n  'setDomNodeChildrenFromArrayMapping'\n], function (coreUtil) {\n  coreUtils[coreUtil] = utils[coreUtil]\n})\n\ncoreUtils.domNodeDisposal = {\n  addDisposeCallback: utils.addDisposeCallback,\n  otherNodeCleanerFunctions: utils.otherNodeCleanerFunctions,\n  removeDisposeCallback: utils.removeDisposeCallback,\n  removeNode: utils.removeNode\n}\n\nutils.extend(coreUtils, {\n  setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,\n  unwrapObservable: unwrap,\n  peekObservable: peek\n})\n\n// Create the binding provider and default bindings.\nconst provider = new MultiProvider({\n  globals: utils.options.bindingGlobals,\n  providers: [\n    new AttributeMustacheProvider(),\n    new TextMustacheProvider(),\n    new ComponentProvider(),\n    new DataBindProvider(),\n    new VirtualProvider(),\n    new AttributeProvider()\n  ]\n})\n\nutils.options.bindingProviderInstance = provider\n\nprovider.bindingHandlers.set(coreBindings)\nprovider.bindingHandlers.set(templateBindings)\nprovider.bindingHandlers.set(ifBindings)\nprovider.bindingHandlers.set(foreachBindings)\nprovider.bindingHandlers.set({ each: foreachBindings.foreach })\nprovider.bindingHandlers.set(componentBindings)\n\nObject.assign(utils.options.filters, punchesFilters);\n\n// Expose the API.\nexport default {\n    // --- Top-level ---\n  version: '{{VERSION}}',\n  options: utils.options,\n\n  extenders: extenders,\n  filters: utils.options.filters,\n  Component: components.ComponentABC,\n\n    // --- Utilities ---\n  cleanNode: utils.cleanNode,\n  memoization: utils.memoization,\n  removeNode: utils.removeNode,\n  tasks: utils.tasks,\n  utils: coreUtils,\n  dependencyDetection,\n  ignoreDependencies: dependencyDetection.ignore,\n\n    // -- Observable ---\n  isObservable,\n  isSubscribable,\n  isWriteableObservable,\n  isWritableObservable: isWriteableObservable,\n  observable,\n  observableArray,\n  peek,\n  subscribable,\n  unwrap,\n  toJS,\n  toJSON,\n\n    // ... Computed ...\n  computed,\n  isComputed,\n  isPureComputed,\n  pureComputed,\n\n    // --- Templates ---\n  nativeTemplateEngine,\n  renderTemplate,\n  setTemplateEngine,\n  templateEngine,\n  templateSources: { domElement, anonymousTemplate },\n\n    // --- Binding ---\n  applyBindingAccessorsToNode,\n  applyBindings,\n  applyBindingsToDescendants,\n  applyBindingsToNode,\n  bindingHandlers: provider.bindingHandlers,\n  bindingProvider: provider,\n  contextFor,\n  dataFor,\n  getBindingHandler,\n  BindingHandler,\n  AsyncBindingHandler,\n  virtualElements: utils.virtualElements,\n  domNodeDisposal: coreUtils.domNodeDisposal,\n\n    // --- Components ---\n  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\ No newline at end of file
diff --git a/packages/tko/dist/tko.min.js b/packages/tko/dist/tko.min.js
new file mode 100644
index 00000000..73dee8b7
--- /dev/null
+++ b/packages/tko/dist/tko.min.js
@@ -0,0 +1,2 @@
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+//# sourceMappingURL=tko.min.js.map
diff --git a/packages/tko/dist/tko.min.js.map b/packages/tko/dist/tko.min.js.map
new file mode 100644
index 00000000..aeae4eb2
--- /dev/null
+++ b/packages/tko/dist/tko.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"tko.min.js","sources":["../../tko.utils/dist/tko.utils.js","../../tko.observable/dist/tko.observable.js","../../tko.computed/dist/tko.computed.js","../../tko.utils.parser/dist/tko.utils.parser.js","../../tko.provider.bindingString/dist/tko.provider.bindingString.js","../../tko.provider.virtual/dist/tko.provider.virtual.js","../../tko.provider.databind/dist/tko.provider.databind.js","../../tko.utils.component/dist/tko.utils.component.js","../../tko.provider.component/dist/tko.provider.component.js","../../tko.provider.attr/dist/tko.provider.attr.js","../../tko.provider.multi/dist/tko.provider.multi.js","../../tko.provider.mustache/dist/tko.provider.mustache.js","../../tko.bind/dist/tko.bind.js","../../tko.binding.template/dist/tko.binding.template.js","../../tko.binding.if/dist/tko.binding.if.js","../../tko.binding.foreach/dist/tko.binding.foreach.js","../../tko.binding.component/dist/tko.binding.component.js","../../tko.provider/dist/tko.provider.js","../../tko.lifecycle/dist/tko.lifecycle.js","../../tko.binding.core/dist/tko.binding.core.js","../../tko.filter.punches/dist/tko.filter.punches.js","../src/index.js"],"sourcesContent":["//\n// Array utilities\n//\n/* eslint no-cond-assign: 0 */\nfunction arrayForEach(array, action) {\n    for (var i = 0, j = array.length; i < j; i++)\n        action(array[i], i);\n}\nfunction arrayIndexOf(array, item) {\n    // IE9\n    if (typeof Array.prototype.indexOf == \"function\")\n        return Array.prototype.indexOf.call(array, item);\n    for (var i = 0, j = array.length; i < j; i++)\n        if (array[i] === item)\n            return i;\n    return -1;\n}\nfunction arrayFirst(array, predicate, predicateOwner) {\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate.call(predicateOwner, array[i], i))\n            return array[i];\n    return null;\n}\nfunction arrayRemoveItem(array, itemToRemove) {\n    var index = arrayIndexOf(array, itemToRemove);\n    if (index > 0) {\n        array.splice(index, 1);\n    }\n    else if (index === 0) {\n        array.shift();\n    }\n}\nfunction arrayGetDistinctValues(array) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++) {\n        if (arrayIndexOf(result, array[i]) < 0)\n            result.push(array[i]);\n    }\n    return result;\n}\nfunction arrayMap(array, mapping) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        result.push(mapping(array[i], i));\n    return result;\n}\nfunction arrayFilter(array, predicate) {\n    array = array || [];\n    var result = [];\n    for (var i = 0, j = array.length; i < j; i++)\n        if (predicate(array[i], i))\n            result.push(array[i]);\n    return result;\n}\nfunction arrayPushAll(array, valuesToPush) {\n    if (valuesToPush instanceof Array)\n        array.push.apply(array, valuesToPush);\n    else\n        for (var i = 0, j = valuesToPush.length; i < j; i++)\n            array.push(valuesToPush[i]);\n    return array;\n}\nfunction addOrRemoveItem(array, value, included) {\n    var existingEntryIndex = arrayIndexOf(typeof array.peek === 'function' ? array.peek() : array, value);\n    if (existingEntryIndex < 0) {\n        if (included)\n            array.push(value);\n    }\n    else {\n        if (!included)\n            array.splice(existingEntryIndex, 1);\n    }\n}\nfunction makeArray(arrayLikeObject) {\n    var result = [];\n    for (var i = 0, j = arrayLikeObject.length; i < j; i++) {\n        result.push(arrayLikeObject[i]);\n    }\n    return result;\n}\nfunction range(min, max) {\n    min = typeof min === 'function' ? min() : min;\n    max = typeof max === 'function' ? max() : max;\n    var result = [];\n    for (var i = min; i <= max; i++)\n        result.push(i);\n    return result;\n}\n// Go through the items that have been added and deleted and try to find matches between them.\nfunction findMovesInArrayComparison(left, right, limitFailedCompares) {\n    if (left.length && right.length) {\n        var failedCompares, l, r, leftItem, rightItem;\n        for (failedCompares = l = 0; (!limitFailedCompares || failedCompares < limitFailedCompares) && (leftItem = left[l]); ++l) {\n            for (r = 0; rightItem = right[r]; ++r) {\n                if (leftItem['value'] === rightItem['value']) {\n                    leftItem['moved'] = rightItem['index'];\n                    rightItem['moved'] = leftItem['index'];\n                    right.splice(r, 1); // This item is marked as moved; so remove it from right list\n                    failedCompares = r = 0; // Reset failed compares count because we're checking for consecutive failures\n                    break;\n                }\n            }\n            failedCompares += r;\n        }\n    }\n}\nvar statusNotInOld = 'added';\nvar statusNotInNew = 'deleted';\n// Simple calculation based on Levenshtein distance.\nfunction compareArrays(oldArray, newArray, options) {\n    // For backward compatibility, if the third arg is actually a bool, interpret\n    // it as the old parameter 'dontLimitMoves'. Newer code should use { dontLimitMoves: true }.\n    options = (typeof options === 'boolean') ? { 'dontLimitMoves': options } : (options || {});\n    oldArray = oldArray || [];\n    newArray = newArray || [];\n    if (oldArray.length < newArray.length)\n        return compareSmallArrayToBigArray(oldArray, newArray, statusNotInOld, statusNotInNew, options);\n    else\n        return compareSmallArrayToBigArray(newArray, oldArray, statusNotInNew, statusNotInOld, options);\n}\nfunction compareSmallArrayToBigArray(smlArray, bigArray, statusNotInSml, statusNotInBig, options) {\n    var myMin = Math.min, myMax = Math.max, editDistanceMatrix = [], smlIndex, smlIndexMax = smlArray.length, bigIndex, bigIndexMax = bigArray.length, compareRange = (bigIndexMax - smlIndexMax) || 1, maxDistance = smlIndexMax + bigIndexMax + 1, thisRow, lastRow, bigIndexMaxForRow, bigIndexMinForRow;\n    for (smlIndex = 0; smlIndex <= smlIndexMax; smlIndex++) {\n        lastRow = thisRow;\n        editDistanceMatrix.push(thisRow = []);\n        bigIndexMaxForRow = myMin(bigIndexMax, smlIndex + compareRange);\n        bigIndexMinForRow = myMax(0, smlIndex - 1);\n        for (bigIndex = bigIndexMinForRow; bigIndex <= bigIndexMaxForRow; bigIndex++) {\n            if (!bigIndex)\n                thisRow[bigIndex] = smlIndex + 1;\n            else if (!smlIndex)\n                thisRow[bigIndex] = bigIndex + 1;\n            else if (smlArray[smlIndex - 1] === bigArray[bigIndex - 1])\n                thisRow[bigIndex] = lastRow[bigIndex - 1]; // copy value (no edit)\n            else {\n                var northDistance = lastRow[bigIndex] || maxDistance; // not in big (deletion)\n                var westDistance = thisRow[bigIndex - 1] || maxDistance; // not in small (addition)\n                thisRow[bigIndex] = myMin(northDistance, westDistance) + 1;\n            }\n        }\n    }\n    var editScript = [], meMinusOne, notInSml = [], notInBig = [];\n    for (smlIndex = smlIndexMax, bigIndex = bigIndexMax; smlIndex || bigIndex;) {\n        meMinusOne = editDistanceMatrix[smlIndex][bigIndex] - 1;\n        if (bigIndex && meMinusOne === editDistanceMatrix[smlIndex][bigIndex - 1]) {\n            notInSml.push(editScript[editScript.length] = {\n                'status': statusNotInSml,\n                'value': bigArray[--bigIndex],\n                'index': bigIndex\n            });\n        }\n        else if (smlIndex && meMinusOne === editDistanceMatrix[smlIndex - 1][bigIndex]) {\n            notInBig.push(editScript[editScript.length] = {\n                'status': statusNotInBig,\n                'value': smlArray[--smlIndex],\n                'index': smlIndex\n            });\n        }\n        else {\n            --bigIndex;\n            --smlIndex;\n            if (!options['sparse']) {\n                editScript.push({\n                    'status': \"retained\",\n                    'value': bigArray[bigIndex]\n                });\n            }\n        }\n    }\n    // Set a limit on the number of consecutive non-matching comparisons; having it a multiple of\n    // smlIndexMax keeps the time complexity of this algorithm linear.\n    findMovesInArrayComparison(notInBig, notInSml, !options['dontLimitMoves'] && smlIndexMax * 10);\n    return editScript.reverse();\n}\n\n//\n// This becomes ko.options\n// --\n//\n// This is the root 'options', which must be extended by others.\nvar _global;\ntry {\n    _global = window;\n}\ncatch (e) {\n    _global = global;\n}\nvar options = {\n    deferUpdates: false,\n    useOnlyNativeEvents: false,\n    protoProperty: '__ko_proto__',\n    // Modify the default attribute from `data-bind`.\n    defaultBindingAttribute: 'data-bind',\n    // Enable/disable <!-- ko binding: ... -> style bindings\n    allowVirtualElements: true,\n    // Global variables that can be accessed from bindings.\n    bindingGlobals: _global,\n    // An instance of the binding provider.\n    bindingProviderInstance: null,\n    // jQuery will be automatically set to _global.jQuery in applyBindings\n    // if it is (strictly equal to) undefined.  Set it to false or null to\n    // disable automatically setting jQuery.\n    jQuery: _global && _global.jQuery,\n    Promise: _global && _global.Promise,\n    taskScheduler: null,\n    debug: false,\n    global: _global,\n    document: _global.document,\n    // Filters for bindings\n    //   data-bind=\"expression | filter_1 | filter_2\"\n    filters: {},\n    onError: function (e) { throw e; },\n    set: function (name, value) {\n        options[name] = value;\n    }\n};\nObject.defineProperty(options, '$', {\n    get: function () { return options.jQuery; }\n});\n\n//\n// Error handling\n// ---\n//\n// The default onError handler is to re-throw.\nfunction catchFunctionErrors(delegate) {\n    return options.onError ? function () {\n        try {\n            return delegate.apply(this, arguments);\n        }\n        catch (e) {\n            options.onError(e);\n        }\n    } : delegate;\n}\nfunction deferError(error) {\n    safeSetTimeout(function () { options.onError(error); }, 0);\n}\nfunction safeSetTimeout(handler, timeout) {\n    return setTimeout(catchFunctionErrors(handler), timeout);\n}\n\n//\n// Asynchronous functionality\n// ---\nfunction throttle(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        if (!timeoutInstance) {\n            timeoutInstance = safeSetTimeout(function () {\n                timeoutInstance = undefined;\n                callback();\n            }, timeout);\n        }\n    };\n}\nfunction debounce(callback, timeout) {\n    var timeoutInstance;\n    return function () {\n        clearTimeout(timeoutInstance);\n        timeoutInstance = safeSetTimeout(callback, timeout);\n    };\n}\n\n//\n// Detection and Workarounds for Internet Explorer\n//\n// Detect IE versions for bug workarounds (uses IE conditionals, not UA string, for robustness)\n// Note that, since IE 10 does not support conditional comments, the following logic only detects IE < 10.\n// Currently this is by design, since IE 10+ behaves correctly when treated as a standard browser.\n// If there is a future need to detect specific versions of IE10+, we will amend this.\nvar ieVersion = options.document && (function () {\n    var version = 3, div = options.document.createElement('div'), iElems = div.getElementsByTagName('i');\n    // Keep constructing conditional HTML blocks until we hit one that resolves to an empty fragment\n    while (div.innerHTML = '<!--[if gt IE ' + (++version) + ']><i></i><![endif]-->',\n        iElems[0]) { }\n    return version > 4 ? version : undefined;\n}());\nvar isIe6 = ieVersion === 6;\nvar isIe7 = ieVersion === 7;\n\n//\n// Object functions\n//\nfunction extend(target, source) {\n    if (source) {\n        for (var prop in source) {\n            if (source.hasOwnProperty(prop)) {\n                target[prop] = source[prop];\n            }\n        }\n    }\n    return target;\n}\nfunction objectForEach(obj, action) {\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            action(prop, obj[prop]);\n        }\n    }\n}\nfunction objectMap(source, mapping) {\n    if (!source)\n        return source;\n    var target = {};\n    for (var prop in source) {\n        if (source.hasOwnProperty(prop)) {\n            target[prop] = mapping(source[prop], prop, source);\n        }\n    }\n    return target;\n}\nfunction getObjectOwnProperty(obj, propName) {\n    return obj.hasOwnProperty(propName) ? obj[propName] : undefined;\n}\nfunction clonePlainObjectDeep(obj, seen) {\n    if (!seen) {\n        seen = [];\n    }\n    if (!obj || typeof obj !== 'object'\n        || obj.constructor !== Object\n        || seen.indexOf(obj) !== -1) {\n        return obj;\n    }\n    // Anything that makes it below is a plain object that has not yet\n    // been seen/cloned.\n    seen.push(obj);\n    var result = {};\n    for (var prop in obj) {\n        if (obj.hasOwnProperty(prop)) {\n            result[prop] = clonePlainObjectDeep(obj[prop], seen);\n        }\n    }\n    return result;\n}\n\n//\n// Prototype Functions\n//\nvar protoProperty = options.protoProperty;\nvar canSetPrototype = ({ __proto__: [] } instanceof Array);\nfunction setPrototypeOf(obj, proto) {\n    obj.__proto__ = proto;\n    return obj;\n}\nvar setPrototypeOfOrExtend = canSetPrototype ? setPrototypeOf : extend;\nfunction hasPrototype(instance, prototype) {\n    if ((instance === null) || (instance === undefined) || (instance[protoProperty] === undefined))\n        return false;\n    if (instance[protoProperty] === prototype)\n        return true;\n    return hasPrototype(instance[protoProperty], prototype); // Walk the prototype chain\n}\n\n//\n// String (and JSON)\n//\nfunction stringTrim(string) {\n    return string === null || string === undefined ? '' :\n        string.trim ?\n            string.trim() :\n            string.toString().replace(/^[\\s\\xa0]+|[\\s\\xa0]+$/g, '');\n}\nfunction stringStartsWith(string, startsWith) {\n    string = string || \"\";\n    if (startsWith.length > string.length)\n        return false;\n    return string.substring(0, startsWith.length) === startsWith;\n}\nfunction parseJson(jsonString) {\n    if (typeof jsonString == \"string\") {\n        jsonString = stringTrim(jsonString);\n        if (jsonString) {\n            if (JSON && JSON.parse)\n                return JSON.parse(jsonString);\n            return (new Function(\"return \" + jsonString))(); // Fallback on less safe parsing for older browsers\n        }\n    }\n    return null;\n}\nfunction stringifyJson(data, replacer, space) {\n    if (!JSON || !JSON.stringify)\n        throw new Error(\"Cannot find JSON.stringify(). Some browsers (e.g., IE < 8) don't support it natively, but you can overcome this by adding a script reference to json2.js, downloadable from http://www.json.org/json2.js\");\n    return JSON.stringify(typeof data === 'function' ? data() : data, replacer, space);\n}\n\n//\n// ES6 Symbols\n//\nvar useSymbols = typeof Symbol === 'function';\nfunction createSymbolOrString(identifier) {\n    return useSymbols ? Symbol(identifier) : identifier;\n}\n\n//\n// DOM - CSS\n//\n// For details on the pattern for changing node classes\n// see: https://github.com/knockout/knockout/issues/1597\nvar cssClassNameRegex = /\\S+/g;\nfunction toggleDomNodeCssClass(node, classNames, shouldHaveClass) {\n    var addOrRemoveFn;\n    if (!classNames) {\n        return;\n    }\n    if (typeof node.classList === 'object') {\n        addOrRemoveFn = node.classList[shouldHaveClass ? 'add' : 'remove'];\n        arrayForEach(classNames.match(cssClassNameRegex), function (className) {\n            addOrRemoveFn.call(node.classList, className);\n        });\n    }\n    else if (typeof node.className['baseVal'] === 'string') {\n        // SVG tag .classNames is an SVGAnimatedString instance\n        toggleObjectClassPropertyString(node.className, 'baseVal', classNames, shouldHaveClass);\n    }\n    else {\n        // node.className ought to be a string.\n        toggleObjectClassPropertyString(node, 'className', classNames, shouldHaveClass);\n    }\n}\nfunction toggleObjectClassPropertyString(obj, prop, classNames, shouldHaveClass) {\n    // obj/prop is either a node/'className' or a SVGAnimatedString/'baseVal'.\n    var currentClassNames = obj[prop].match(cssClassNameRegex) || [];\n    arrayForEach(classNames.match(cssClassNameRegex), function (className) {\n        addOrRemoveItem(currentClassNames, className, shouldHaveClass);\n    });\n    obj[prop] = currentClassNames.join(\" \");\n}\n\n//\n// jQuery\n//\n// TODO: deprecate in favour of options.$\nvar jQueryInstance = options.global && options.global.jQuery;\nfunction jQuerySetInstance(jquery) {\n    options.jQuery = jQueryInstance = jquery;\n}\n\n//\n// Information about the DOM\n//\nfunction domNodeIsContainedBy(node, containedByNode) {\n    if (node === containedByNode)\n        return true;\n    if (node.nodeType === 11)\n        return false; // Fixes issue #1162 - can't use node.contains for document fragments on IE8\n    if (containedByNode.contains)\n        return containedByNode.contains(node.nodeType !== 1 ? node.parentNode : node);\n    if (containedByNode.compareDocumentPosition)\n        return (containedByNode.compareDocumentPosition(node) & 16) == 16;\n    while (node && node != containedByNode) {\n        node = node.parentNode;\n    }\n    return !!node;\n}\nfunction domNodeIsAttachedToDocument(node) {\n    return domNodeIsContainedBy(node, node.ownerDocument.documentElement);\n}\nfunction anyDomNodeIsAttachedToDocument(nodes) {\n    return !!arrayFirst(nodes, domNodeIsAttachedToDocument);\n}\nfunction tagNameLower(element) {\n    // For HTML elements, tagName will always be upper case; for XHTML elements, it'll be lower case.\n    // Possible future optimization: If we know it's an element from an XHTML document (not HTML),\n    // we don't need to do the .toLowerCase() as it will always be lower case anyway.\n    return element && element.tagName && element.tagName.toLowerCase();\n}\nfunction isDomElement(obj) {\n    if (window.HTMLElement) {\n        return obj instanceof HTMLElement;\n    }\n    else {\n        return obj && obj.tagName && obj.nodeType === 1;\n    }\n}\nfunction isDocumentFragment(obj) {\n    if (window.DocumentFragment) {\n        return obj instanceof DocumentFragment;\n    }\n    else {\n        return obj && obj.nodeType === 11;\n    }\n}\n\n//\n// DOM node data\n//\n//\nvar dataStoreKeyExpandoPropertyName = \"__ko__data\" + new Date();\nvar dataStore;\nvar uniqueId = 0;\nvar get;\nvar set;\nvar clear;\n/**\n * --- Legacy getter/setter (may cause memory leaks) ---\n */\nfunction getAll(node, createIfNotFound) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    var hasExistingDataStore = dataStoreKey && (dataStoreKey !== \"null\") && dataStore[dataStoreKey];\n    if (!hasExistingDataStore) {\n        if (!createIfNotFound)\n            return undefined;\n        dataStoreKey = node[dataStoreKeyExpandoPropertyName] = \"ko\" + uniqueId++;\n        dataStore[dataStoreKey] = {};\n    }\n    return dataStore[dataStoreKey];\n}\nfunction legacyGet(node, key) {\n    var allDataForNode = getAll(node, false);\n    return allDataForNode === undefined ? undefined : allDataForNode[key];\n}\nfunction legacySet(node, key, value) {\n    if (value === undefined) {\n        // Make sure we don't actually create a new domData key if we are actually deleting a value\n        if (getAll(node, false) === undefined)\n            return;\n    }\n    var allDataForNode = getAll(node, true);\n    allDataForNode[key] = value;\n}\nfunction legacyClear(node) {\n    var dataStoreKey = node[dataStoreKeyExpandoPropertyName];\n    if (dataStoreKey) {\n        delete dataStore[dataStoreKey];\n        node[dataStoreKeyExpandoPropertyName] = null;\n        return true; // Exposing \"did clean\" flag purely so specs can infer whether things have been cleaned up as intended\n    }\n    return false;\n}\n/**\n * WeakMap get/set/clear\n */\nfunction wmGet(node, key) {\n    return (dataStore.get(node) || {})[key];\n}\nfunction wmSet(node, key, value) {\n    var dataForNode;\n    if (dataStore.has(node)) {\n        dataForNode = dataStore.get(node);\n    }\n    else {\n        dataForNode = {};\n        dataStore.set(node, dataForNode);\n    }\n    dataForNode[key] = value;\n}\nfunction wmClear(node) {\n    return dataStore[\"delete\"](node);\n}\nif ('WeakMap' in options.global) {\n    dataStore = new WeakMap();\n    get = wmGet;\n    set = wmSet;\n    clear = wmClear;\n}\nelse {\n    dataStore = {};\n    get = legacyGet;\n    set = legacySet;\n    clear = legacyClear;\n}\n/**\n * Create a unique key-string identifier.\n * FIXME: This should be deprecated.\n */\nfunction nextKey() {\n    return (uniqueId++) + dataStoreKeyExpandoPropertyName;\n}\n\n\nvar data = Object.freeze({\n\tnextKey: nextKey,\n\tget get () { return get; },\n\tget set () { return set; },\n\tget clear () { return clear; }\n});\n\n//\n// DOM node disposal\n//\n/* eslint no-cond-assign: 0 */\nvar domDataKey = nextKey();\n// Node types:\n// 1: Element\n// 8: Comment\n// 9: Document\nvar cleanableNodeTypes = { 1: true, 8: true, 9: true };\nvar cleanableNodeTypesWithDescendants = { 1: true, 9: true };\nfunction getDisposeCallbacksCollection(node, createIfNotFound) {\n    var allDisposeCallbacks = get(node, domDataKey);\n    if ((allDisposeCallbacks === undefined) && createIfNotFound) {\n        allDisposeCallbacks = [];\n        set(node, domDataKey, allDisposeCallbacks);\n    }\n    return allDisposeCallbacks;\n}\nfunction destroyCallbacksCollection(node) {\n    set(node, domDataKey, undefined);\n}\nfunction cleanSingleNode(node) {\n    // Run all the dispose callbacks\n    var callbacks = getDisposeCallbacksCollection(node, false);\n    if (callbacks) {\n        callbacks = callbacks.slice(0); // Clone, as the array may be modified during iteration (typically, callbacks will remove themselves)\n        for (var i = 0; i < callbacks.length; i++)\n            callbacks[i](node);\n    }\n    // Erase the DOM data\n    clear(node);\n    // Perform cleanup needed by external libraries (currently only jQuery, but can be extended)\n    for (var i = 0, j = otherNodeCleanerFunctions.length; i < j; ++i) {\n        otherNodeCleanerFunctions[i](node);\n    }\n    // Clear any immediate-child comment nodes, as these wouldn't have been found by\n    // node.getElementsByTagName(\"*\") in cleanNode() (comment nodes aren't elements)\n    if (cleanableNodeTypesWithDescendants[node.nodeType])\n        cleanImmediateCommentTypeChildren(node);\n}\nfunction cleanImmediateCommentTypeChildren(nodeWithChildren) {\n    var child, nextChild = nodeWithChildren.firstChild;\n    while (child = nextChild) {\n        nextChild = child.nextSibling;\n        if (child.nodeType === 8)\n            cleanSingleNode(child);\n    }\n}\n// Exports\nfunction addDisposeCallback(node, callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"Callback must be a function\");\n    getDisposeCallbacksCollection(node, true).push(callback);\n}\nfunction removeDisposeCallback(node, callback) {\n    var callbacksCollection = getDisposeCallbacksCollection(node, false);\n    if (callbacksCollection) {\n        arrayRemoveItem(callbacksCollection, callback);\n        if (callbacksCollection.length == 0)\n            destroyCallbacksCollection(node);\n    }\n}\nfunction cleanNode(node) {\n    // First clean this node, where applicable\n    if (cleanableNodeTypes[node.nodeType]) {\n        cleanSingleNode(node);\n        // ... then its descendants, where applicable\n        if (cleanableNodeTypesWithDescendants[node.nodeType]) {\n            // Clone the descendants list in case it changes during iteration\n            var descendants = [];\n            arrayPushAll(descendants, node.getElementsByTagName(\"*\"));\n            for (var i = 0, j = descendants.length; i < j; i++)\n                cleanSingleNode(descendants[i]);\n        }\n    }\n    return node;\n}\nfunction removeNode(node) {\n    cleanNode(node);\n    if (node.parentNode)\n        node.parentNode.removeChild(node);\n}\n// Expose supplemental node cleaning functions.\nvar otherNodeCleanerFunctions = [];\n// Special support for jQuery here because it's so commonly used.\n// Many jQuery plugins (including jquery.tmpl) store data using jQuery's equivalent of domData\n// so notify it to tear down any resources associated with the node & descendants here.\nfunction cleanjQueryData(node) {\n    var jQueryCleanNodeFn = jQueryInstance\n        ? jQueryInstance.cleanData : null;\n    if (jQueryCleanNodeFn) {\n        jQueryCleanNodeFn([node]);\n    }\n}\notherNodeCleanerFunctions.push(cleanjQueryData);\n\n//\n// DOM Events\n//\n// Represent the known event types in a compact way, then at runtime transform it into a hash with event name as key (for fast lookup)\nvar knownEvents = {};\nvar knownEventTypesByEventName = {};\nvar keyEventTypeName = (options.global.navigator && /Firefox\\/2/i.test(options.global.navigator.userAgent)) ? 'KeyboardEvent' : 'UIEvents';\nknownEvents[keyEventTypeName] = ['keyup', 'keydown', 'keypress'];\nknownEvents['MouseEvents'] = [\n    'click', 'dblclick', 'mousedown', 'mouseup', 'mousemove', 'mouseover',\n    'mouseout', 'mouseenter', 'mouseleave'\n];\nobjectForEach(knownEvents, function (eventType, knownEventsForType) {\n    if (knownEventsForType.length) {\n        for (var i = 0, j = knownEventsForType.length; i < j; i++)\n            knownEventTypesByEventName[knownEventsForType[i]] = eventType;\n    }\n});\nfunction isClickOnCheckableElement(element, eventType) {\n    if ((tagNameLower(element) !== \"input\") || !element.type)\n        return false;\n    if (eventType.toLowerCase() != \"click\")\n        return false;\n    var inputType = element.type;\n    return (inputType == \"checkbox\") || (inputType == \"radio\");\n}\n// Workaround for an IE9 issue - https://github.com/SteveSanderson/knockout/issues/406\nvar eventsThatMustBeRegisteredUsingAttachEvent = { 'propertychange': true };\nfunction registerEventHandler(element, eventType, handler) {\n    var wrappedHandler = catchFunctionErrors(handler);\n    var mustUseAttachEvent = ieVersion && eventsThatMustBeRegisteredUsingAttachEvent[eventType];\n    if (!options.useOnlyNativeEvents && !mustUseAttachEvent && jQueryInstance) {\n        jQueryInstance(element).bind(eventType, wrappedHandler);\n    }\n    else if (!mustUseAttachEvent && typeof element.addEventListener == \"function\")\n        element.addEventListener(eventType, wrappedHandler, false);\n    else if (typeof element.attachEvent !== \"undefined\") {\n        var attachEventHandler = function (event) { wrappedHandler.call(element, event); }, attachEventName = \"on\" + eventType;\n        element.attachEvent(attachEventName, attachEventHandler);\n        // IE does not dispose attachEvent handlers automatically (unlike with addEventListener)\n        // so to avoid leaks, we have to remove them manually. See bug #856\n        addDisposeCallback(element, function () {\n            element.detachEvent(attachEventName, attachEventHandler);\n        });\n    }\n    else\n        throw new Error(\"Browser doesn't support addEventListener or attachEvent\");\n}\nfunction triggerEvent(element, eventType) {\n    if (!(element && element.nodeType))\n        throw new Error(\"element must be a DOM node when calling triggerEvent\");\n    // For click events on checkboxes and radio buttons, jQuery toggles the element checked state *after* the\n    // event handler runs instead of *before*. (This was fixed in 1.9 for checkboxes but not for radio buttons.)\n    // IE doesn't change the checked state when you trigger the click event using \"fireEvent\".\n    // In both cases, we'll use the click method instead.\n    var useClickWorkaround = isClickOnCheckableElement(element, eventType);\n    if (!options.useOnlyNativeEvents && jQueryInstance && !useClickWorkaround) {\n        jQueryInstance(element).trigger(eventType);\n    }\n    else if (typeof document.createEvent == \"function\") {\n        if (typeof element.dispatchEvent == \"function\") {\n            var eventCategory = knownEventTypesByEventName[eventType] || \"HTMLEvents\";\n            var event = document.createEvent(eventCategory);\n            event.initEvent(eventType, true, true, options.global, 0, 0, 0, 0, 0, false, false, false, false, 0, element);\n            element.dispatchEvent(event);\n        }\n        else\n            throw new Error(\"The supplied element doesn't support dispatchEvent\");\n    }\n    else if (useClickWorkaround && element.click) {\n        element.click();\n    }\n    else if (typeof element.fireEvent != \"undefined\") {\n        element.fireEvent(\"on\" + eventType);\n    }\n    else {\n        throw new Error(\"Browser doesn't support triggering events\");\n    }\n}\n\n//\n//  DOM node manipulation\n//\nfunction fixUpContinuousNodeArray(continuousNodeArray, parentNode) {\n    // Before acting on a set of nodes that were previously outputted by a template function, we have to reconcile\n    // them against what is in the DOM right now. It may be that some of the nodes have already been removed, or that\n    // new nodes might have been inserted in the middle, for example by a binding. Also, there may previously have been\n    // leading comment nodes (created by rewritten string-based templates) that have since been removed during binding.\n    // So, this function translates the old \"map\" output array into its best guess of the set of current DOM nodes.\n    //\n    // Rules:\n    //   [A] Any leading nodes that have been removed should be ignored\n    //       These most likely correspond to memoization nodes that were already removed during binding\n    //       See https://github.com/knockout/knockout/pull/440\n    //   [B] Any trailing nodes that have been remove should be ignored\n    //       This prevents the code here from adding unrelated nodes to the array while processing rule [C]\n    //       See https://github.com/knockout/knockout/pull/1903\n    //   [C] We want to output a continuous series of nodes. So, ignore any nodes that have already been removed,\n    //       and include any nodes that have been inserted among the previous collection\n    if (continuousNodeArray.length) {\n        // The parent node can be a virtual element; so get the real parent node\n        parentNode = (parentNode.nodeType === 8 && parentNode.parentNode) || parentNode;\n        // Rule [A]\n        while (continuousNodeArray.length && continuousNodeArray[0].parentNode !== parentNode)\n            continuousNodeArray.splice(0, 1);\n        // Rule [B]\n        while (continuousNodeArray.length > 1 && continuousNodeArray[continuousNodeArray.length - 1].parentNode !== parentNode)\n            continuousNodeArray.length--;\n        // Rule [C]\n        if (continuousNodeArray.length > 1) {\n            var current = continuousNodeArray[0], last = continuousNodeArray[continuousNodeArray.length - 1];\n            // Replace with the actual new continuous node set\n            continuousNodeArray.length = 0;\n            while (current !== last) {\n                continuousNodeArray.push(current);\n                current = current.nextSibling;\n            }\n            continuousNodeArray.push(last);\n        }\n    }\n    return continuousNodeArray;\n}\nfunction setOptionNodeSelectionState(optionNode, isSelected) {\n    // IE6 sometimes throws \"unknown error\" if you try to write to .selected directly, whereas Firefox struggles with setAttribute. Pick one based on browser.\n    if (ieVersion < 7)\n        optionNode.setAttribute(\"selected\", isSelected);\n    else\n        optionNode.selected = isSelected;\n}\nfunction forceRefresh(node) {\n    // Workaround for an IE9 rendering bug - https://github.com/SteveSanderson/knockout/issues/209\n    if (ieVersion >= 9) {\n        // For text nodes and comment nodes (most likely virtual elements), we will have to refresh the container\n        var elem = node.nodeType == 1 ? node : node.parentNode;\n        if (elem.style)\n            elem.style.zoom = elem.style.zoom;\n    }\n}\nfunction ensureSelectElementIsRenderedCorrectly(selectElement) {\n    // Workaround for IE9 rendering bug - it doesn't reliably display all the text in dynamically-added select boxes unless you force it to re-render by updating the width.\n    // (See https://github.com/SteveSanderson/knockout/issues/312, http://stackoverflow.com/questions/5908494/select-only-shows-first-char-of-selected-option)\n    // Also fixes IE7 and IE8 bug that causes selects to be zero width if enclosed by 'if' or 'with'. (See issue #839)\n    if (ieVersion) {\n        var originalWidth = selectElement.style.width;\n        selectElement.style.width = 0;\n        selectElement.style.width = originalWidth;\n    }\n}\n\n/* eslint no-cond-assign: 0 */\n//\n// Virtual Elements\n//\n//\n// \"Virtual elements\" is an abstraction on top of the usual DOM API which understands the notion that comment nodes\n// may be used to represent hierarchy (in addition to the DOM's natural hierarchy).\n// If you call the DOM-manipulating functions on ko.virtualElements, you will be able to read and write the state\n// of that virtual hierarchy\n//\n// The point of all this is to support containerless templates (e.g., <!-- ko foreach:someCollection -->blah<!-- /ko -->)\n// without having to scatter special cases all over the binding and templating code.\n// IE 9 cannot reliably read the \"nodeValue\" property of a comment node (see https://github.com/SteveSanderson/knockout/issues/186)\n// but it does give them a nonstandard alternative property called \"text\" that it can read reliably. Other browsers don't have that property.\n// So, use node.text where available, and node.nodeValue elsewhere\nvar commentNodesHaveTextProperty = options.document && options.document.createComment(\"test\").text === \"<!--test-->\";\nvar startCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*ko(?:\\s+([\\s\\S]+))?\\s*-->$/ : /^\\s*ko(?:\\s+([\\s\\S]+))?\\s*$/;\nvar endCommentRegex = commentNodesHaveTextProperty ? /^<!--\\s*\\/ko\\s*-->$/ : /^\\s*\\/ko\\s*$/;\nvar htmlTagsWithOptionallyClosingChildren = { 'ul': true, 'ol': true };\nfunction isStartComment(node) {\n    return (node.nodeType == 8) && startCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\nfunction isEndComment(node) {\n    return (node.nodeType == 8) && endCommentRegex.test(commentNodesHaveTextProperty ? node.text : node.nodeValue);\n}\nfunction getVirtualChildren(startComment, allowUnbalanced) {\n    var currentNode = startComment;\n    var depth = 1;\n    var children = [];\n    while (currentNode = currentNode.nextSibling) {\n        if (isEndComment(currentNode)) {\n            depth--;\n            if (depth === 0)\n                return children;\n        }\n        children.push(currentNode);\n        if (isStartComment(currentNode))\n            depth++;\n    }\n    if (!allowUnbalanced)\n        throw new Error(\"Cannot find closing comment tag to match: \" + startComment.nodeValue);\n    return null;\n}\nfunction getMatchingEndComment(startComment, allowUnbalanced) {\n    var allVirtualChildren = getVirtualChildren(startComment, allowUnbalanced);\n    if (allVirtualChildren) {\n        if (allVirtualChildren.length > 0)\n            return allVirtualChildren[allVirtualChildren.length - 1].nextSibling;\n        return startComment.nextSibling;\n    }\n    else\n        return null; // Must have no matching end comment, and allowUnbalanced is true\n}\nfunction getUnbalancedChildTags(node) {\n    // e.g., from <div>OK</div><!-- ko blah --><span>Another</span>, returns: <!-- ko blah --><span>Another</span>\n    //       from <div>OK</div><!-- /ko --><!-- /ko -->,             returns: <!-- /ko --><!-- /ko -->\n    var childNode = node.firstChild, captureRemaining = null;\n    if (childNode) {\n        do {\n            if (captureRemaining)\n                captureRemaining.push(childNode);\n            else if (isStartComment(childNode)) {\n                var matchingEndComment = getMatchingEndComment(childNode, /* allowUnbalanced: */ true);\n                if (matchingEndComment)\n                    childNode = matchingEndComment;\n                else\n                    captureRemaining = [childNode]; // It's unbalanced, so start capturing from this point\n            }\n            else if (isEndComment(childNode)) {\n                captureRemaining = [childNode]; // It's unbalanced (if it wasn't, we'd have skipped over it already), so start capturing\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n    return captureRemaining;\n}\nvar allowedBindings = {};\nvar hasBindingValue = isStartComment;\nfunction childNodes(node) {\n    return isStartComment(node) ? getVirtualChildren(node) : node.childNodes;\n}\nfunction emptyNode(node) {\n    if (!isStartComment(node))\n        emptyDomNode(node);\n    else {\n        var virtualChildren = childNodes(node);\n        for (var i = 0, j = virtualChildren.length; i < j; i++)\n            removeNode(virtualChildren[i]);\n    }\n}\nfunction setDomNodeChildren$1(node, childNodes) {\n    if (!isStartComment(node))\n        setDomNodeChildren(node, childNodes);\n    else {\n        emptyNode(node);\n        var endCommentNode = node.nextSibling; // Must be the next sibling, as we just emptied the children\n        for (var i = 0, j = childNodes.length; i < j; i++)\n            endCommentNode.parentNode.insertBefore(childNodes[i], endCommentNode);\n    }\n}\nfunction prepend(containerNode, nodeToPrepend) {\n    if (!isStartComment(containerNode)) {\n        if (containerNode.firstChild)\n            containerNode.insertBefore(nodeToPrepend, containerNode.firstChild);\n        else\n            containerNode.appendChild(nodeToPrepend);\n    }\n    else {\n        // Start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToPrepend, containerNode.nextSibling);\n    }\n}\nfunction insertAfter(containerNode, nodeToInsert, insertAfterNode) {\n    if (!insertAfterNode) {\n        prepend(containerNode, nodeToInsert);\n    }\n    else if (!isStartComment(containerNode)) {\n        // Insert after insertion point\n        if (insertAfterNode.nextSibling)\n            containerNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n        else\n            containerNode.appendChild(nodeToInsert);\n    }\n    else {\n        // Children of start comments must always have a parent and at least one following sibling (the end comment)\n        containerNode.parentNode.insertBefore(nodeToInsert, insertAfterNode.nextSibling);\n    }\n}\nfunction firstChild(node) {\n    if (!isStartComment(node)) {\n        return node.firstChild;\n    }\n    if (!node.nextSibling || isEndComment(node.nextSibling)) {\n        return null;\n    }\n    return node.nextSibling;\n}\nfunction lastChild(node) {\n    var nextChild = firstChild(node), lastChildNode;\n    do {\n        lastChildNode = nextChild;\n    } while (nextChild = nextSibling(nextChild));\n    return lastChildNode;\n}\nfunction nextSibling(node) {\n    if (isStartComment(node))\n        node = getMatchingEndComment(node);\n    if (node.nextSibling && isEndComment(node.nextSibling))\n        return null;\n    return node.nextSibling;\n}\nfunction previousSibling(node) {\n    var depth = 0;\n    do {\n        if (node.nodeType === 8) {\n            if (isStartComment(node)) {\n                if (--depth === 0) {\n                    return node;\n                }\n            }\n            else if (isEndComment(node)) {\n                depth++;\n            }\n        }\n        else {\n            if (depth === 0) {\n                return node;\n            }\n        }\n    } while (node = node.previousSibling);\n    return;\n}\nfunction virtualNodeBindingValue(node) {\n    var regexMatch = (commentNodesHaveTextProperty ? node.text : node.nodeValue).match(startCommentRegex);\n    return regexMatch ? regexMatch[1] : null;\n}\nfunction normaliseVirtualElementDomStructure(elementVerified) {\n    // Workaround for https://github.com/SteveSanderson/knockout/issues/155\n    // (IE <= 8 or IE 9 quirks mode parses your HTML weirdly, treating closing </li> tags as if they don't exist, thereby moving comment nodes\n    // that are direct descendants of <ul> into the preceding <li>)\n    if (!htmlTagsWithOptionallyClosingChildren[tagNameLower(elementVerified)])\n        return;\n    // Scan immediate children to see if they contain unbalanced comment tags. If they do, those comment tags\n    // must be intended to appear *after* that child, so move them there.\n    var childNode = elementVerified.firstChild;\n    if (childNode) {\n        do {\n            if (childNode.nodeType === 1) {\n                var unbalancedTags = getUnbalancedChildTags(childNode);\n                if (unbalancedTags) {\n                    // Fix up the DOM by moving the unbalanced tags to where they most likely were intended to be placed - *after* the child\n                    var nodeToInsertBefore = childNode.nextSibling;\n                    for (var i = 0; i < unbalancedTags.length; i++) {\n                        if (nodeToInsertBefore)\n                            elementVerified.insertBefore(unbalancedTags[i], nodeToInsertBefore);\n                        else\n                            elementVerified.appendChild(unbalancedTags[i]);\n                    }\n                }\n            }\n        } while (childNode = childNode.nextSibling);\n    }\n}\n\n\n\nvar virtualElements = Object.freeze({\n\tstartCommentRegex: startCommentRegex,\n\tendCommentRegex: endCommentRegex,\n\tisStartComment: isStartComment,\n\tisEndComment: isEndComment,\n\tgetVirtualChildren: getVirtualChildren,\n\tallowedBindings: allowedBindings,\n\thasBindingValue: hasBindingValue,\n\tchildNodes: childNodes,\n\temptyNode: emptyNode,\n\tsetDomNodeChildren: setDomNodeChildren$1,\n\tprepend: prepend,\n\tinsertAfter: insertAfter,\n\tfirstChild: firstChild,\n\tlastChild: lastChild,\n\tnextSibling: nextSibling,\n\tpreviousSibling: previousSibling,\n\tvirtualNodeBindingValue: virtualNodeBindingValue,\n\tnormaliseVirtualElementDomStructure: normaliseVirtualElementDomStructure\n});\n\n//\n// DOM manipulation\n//\n/* eslint no-empty: 0 */\nfunction moveCleanedNodesToContainerElement(nodes) {\n    // Ensure it's a real array, as we're about to reparent the nodes and\n    // we don't want the underlying collection to change while we're doing that.\n    var nodesArray = makeArray(nodes);\n    var templateDocument = (nodesArray[0] && nodesArray[0].ownerDocument) || document;\n    var container = templateDocument.createElement('div');\n    for (var i = 0, j = nodesArray.length; i < j; i++) {\n        container.appendChild(cleanNode(nodesArray[i]));\n    }\n    return container;\n}\nfunction cloneNodes(nodesArray, shouldCleanNodes) {\n    for (var i = 0, j = nodesArray.length, newNodesArray = []; i < j; i++) {\n        var clonedNode = nodesArray[i].cloneNode(true);\n        newNodesArray.push(shouldCleanNodes ? cleanNode(clonedNode) : clonedNode);\n    }\n    return newNodesArray;\n}\nfunction setDomNodeChildren(domNode, childNodes$$1) {\n    emptyDomNode(domNode);\n    if (childNodes$$1) {\n        for (var i = 0, j = childNodes$$1.length; i < j; i++)\n            domNode.appendChild(childNodes$$1[i]);\n    }\n}\nfunction replaceDomNodes(nodeToReplaceOrNodeArray, newNodesArray) {\n    var nodesToReplaceArray = nodeToReplaceOrNodeArray.nodeType ? [nodeToReplaceOrNodeArray] : nodeToReplaceOrNodeArray;\n    if (nodesToReplaceArray.length > 0) {\n        var insertionPoint = nodesToReplaceArray[0];\n        var parent = insertionPoint.parentNode;\n        for (var i = 0, j = newNodesArray.length; i < j; i++)\n            parent.insertBefore(newNodesArray[i], insertionPoint);\n        for (i = 0, j = nodesToReplaceArray.length; i < j; i++) {\n            removeNode(nodesToReplaceArray[i]);\n        }\n    }\n}\nfunction setElementName(element, name) {\n    element.name = name;\n    // Workaround IE 6/7 issue\n    // - https://github.com/SteveSanderson/knockout/issues/197\n    // - http://www.matts411.com/post/setting_the_name_attribute_in_ie_dom/\n    if (ieVersion <= 7) {\n        try {\n            element.mergeAttributes(document.createElement(\"<input name='\" + element.name + \"'/>\"), false);\n        }\n        catch (e) { } // For IE9 with doc mode \"IE9 Standards\" and browser mode \"IE9 Compatibility View\"\n    }\n}\nfunction setTextContent(element, textContent) {\n    var value = typeof textContent === 'function' ? textContent() : textContent;\n    if ((value === null) || (value === undefined))\n        value = \"\";\n    // We need there to be exactly one child: a text node.\n    // If there are no children, more than one, or if it's not a text node,\n    // we'll clear everything and create a single text node.\n    var innerTextNode = firstChild(element);\n    if (!innerTextNode || innerTextNode.nodeType != 3 || nextSibling(innerTextNode)) {\n        setDomNodeChildren$1(element, [element.ownerDocument.createTextNode(value)]);\n    }\n    else {\n        innerTextNode.data = value;\n    }\n    forceRefresh(element);\n}\nfunction emptyDomNode(domNode) {\n    while (domNode.firstChild) {\n        removeNode(domNode.firstChild);\n    }\n}\n\n//\n// HTML-based manipulation\n//\nvar none = [0, \"\", \"\"];\nvar table = [1, \"<table>\", \"</table>\"];\nvar tbody = [2, \"<table><tbody>\", \"</tbody></table>\"];\nvar colgroup = [2, \"<table><tbody></tbody><colgroup>\", \"</colgroup></table>\"];\nvar tr = [3, \"<table><tbody><tr>\", \"</tr></tbody></table>\"];\nvar select = [1, \"<select multiple='multiple'>\", \"</select>\"];\nvar fieldset = [1, \"<fieldset>\", \"</fieldset>\"];\nvar map = [1, \"<map>\", \"</map>\"];\nvar object = [1, \"<object>\", \"</object>\"];\nvar lookup = {\n    'area': map,\n    'col': colgroup,\n    'colgroup': table,\n    'caption': table,\n    'legend': fieldset,\n    'thead': table,\n    'tbody': table,\n    'tfoot': table,\n    'tr': tbody,\n    'td': tr,\n    'th': tr,\n    'option': select,\n    'optgroup': select,\n    'param': object\n};\nvar supportsTemplateTag = options.document && 'content' in options.document.createElement('template');\nfunction getWrap(tags) {\n    var m = tags.match(/^<([a-z]+)[ >]/);\n    return (m && lookup[m[1]]) || none;\n}\nfunction simpleHtmlParse(html, documentContext) {\n    documentContext || (documentContext = document);\n    var windowContext = documentContext['parentWindow'] || documentContext['defaultView'] || window;\n    // Based on jQuery's \"clean\" function, but only accounting for table-related elements.\n    // If you have referenced jQuery, this won't be used anyway - KO will use jQuery's \"clean\" function directly\n    // Note that there's still an issue in IE < 9 whereby it will discard comment nodes that are the first child of\n    // a descendant node. For example: \"<div><!-- mycomment -->abc</div>\" will get parsed as \"<div>abc</div>\"\n    // This won't affect anyone who has referenced jQuery, and there's always the workaround of inserting a dummy node\n    // (possibly a text node) in front of the comment. So, KO does not attempt to workaround this IE issue automatically at present.\n    // Trim whitespace, otherwise indexOf won't work as expected\n    var tags = stringTrim(html).toLowerCase(), div = documentContext.createElement(\"div\"), wrap = getWrap(tags), depth = wrap[0];\n    // Go to html and back, then peel off extra wrappers\n    // Note that we always prefix with some dummy text, because otherwise, IE<9 will strip out leading comment nodes in descendants. Total madness.\n    var markup = \"ignored<div>\" + wrap[1] + html + wrap[2] + \"</div>\";\n    if (typeof windowContext['innerShiv'] == \"function\") {\n        // Note that innerShiv is deprecated in favour of html5shiv. We should consider adding\n        // support for html5shiv (except if no explicit support is needed, e.g., if html5shiv\n        // somehow shims the native APIs so it just works anyway)\n        div.appendChild(windowContext['innerShiv'](markup));\n    }\n    else {\n        div.innerHTML = markup;\n    }\n    // Move to the right depth\n    while (depth--)\n        div = div.lastChild;\n    return makeArray(div.lastChild.childNodes);\n}\nfunction templateHtmlParse(html, documentContext) {\n    if (!documentContext) {\n        documentContext = document;\n    }\n    var template = documentContext.createElement('template');\n    template.innerHTML = html;\n    return makeArray(template.content.childNodes);\n}\nfunction jQueryHtmlParse(html, documentContext) {\n    // jQuery's \"parseHTML\" function was introduced in jQuery 1.8.0 and is a documented public API.\n    if (jQueryInstance.parseHTML) {\n        return jQueryInstance.parseHTML(html, documentContext) || []; // Ensure we always return an array and never null\n    }\n    else {\n        // For jQuery < 1.8.0, we fall back on the undocumented internal \"clean\" function.\n        var elems = jQueryInstance.clean([html], documentContext);\n        // As of jQuery 1.7.1, jQuery parses the HTML by appending it to some dummy parent nodes held in an in-memory document fragment.\n        // Unfortunately, it never clears the dummy parent nodes from the document fragment, so it leaks memory over time.\n        // Fix this by finding the top-most dummy parent element, and detaching it from its owner fragment.\n        if (elems && elems[0]) {\n            // Find the top-most parent element that's a direct child of a document fragment\n            var elem = elems[0];\n            while (elem.parentNode && elem.parentNode.nodeType !== 11 /* i.e., DocumentFragment */)\n                elem = elem.parentNode;\n            // ... then detach it\n            if (elem.parentNode)\n                elem.parentNode.removeChild(elem);\n        }\n        return elems;\n    }\n}\n/**\n * parseHtmlFragment converts a string into an array of DOM Nodes.\n * If supported, it uses <template>-tag parsing, falling back on\n * jQuery parsing (if jQuery is present), and finally on a\n * straightforward parser.\n *\n * @param  {string} html            To be parsed.\n * @param  {Object} documentContext That owns the executing code.\n * @return {[DOMNode]}              Parsed DOM Nodes\n */\nfunction parseHtmlFragment(html, documentContext) {\n    // Prefer <template>-tag based HTML parsing.\n    return supportsTemplateTag ? templateHtmlParse(html, documentContext) :\n        // Benefit from jQuery's on old browsers, where possible\n        // NOTE: jQuery's HTML parsing fails on element names like tr-*.\n        // See: https://github.com/jquery/jquery/pull/1988\n        (jQueryInstance ? jQueryHtmlParse(html, documentContext) :\n            // ... otherwise, this simple logic will do in most common cases.\n            simpleHtmlParse(html, documentContext));\n}\n/**\n  * setHtml empties the node's contents, unwraps the HTML, and\n  * sets the node's HTML using jQuery.html or parseHtmlFragment\n  *\n  * @param {DOMNode} node Node in which HTML needs to be set\n  * @param {DOMNode} html HTML to be inserted in node\n  * @returns undefined\n  */\nfunction setHtml(node, html) {\n    emptyDomNode(node);\n    // There's few cases where we would want to display a stringified\n    // function, so we unwrap it.\n    if (typeof html === 'function') {\n        html = html();\n    }\n    if ((html !== null) && (html !== undefined)) {\n        if (typeof html !== 'string')\n            html = html.toString();\n        // If the browser supports <template> tags, prefer that, as\n        // it obviates all the complex workarounds of jQuery.\n        //\n        // However, jQuery contains a lot of sophisticated code to parse arbitrary HTML fragments,\n        // for example <tr> elements which are not normally allowed to exist on their own.\n        // If you've referenced jQuery (and template tags are not supported) we'll use that rather than duplicating its code.\n        if (jQueryInstance && !supportsTemplateTag) {\n            jQueryInstance(node).html(html);\n        }\n        else {\n            // ... otherwise, use KO's own parsing logic.\n            var parsedNodes = parseHtmlFragment(html, node.ownerDocument);\n            if (node.nodeType === 8) {\n                if (html === null) {\n                    emptyNode(node);\n                }\n                else {\n                    setDomNodeChildren$1(node, parsedNodes);\n                }\n            }\n            else {\n                for (var i = 0; i < parsedNodes.length; i++)\n                    node.appendChild(parsedNodes[i]);\n            }\n        }\n    }\n}\n\n//\n// Memoization\n//\nvar memos = {};\nfunction randomMax8HexChars() {\n    return (((1 + Math.random()) * 0x100000000) | 0).toString(16).substring(1);\n}\nfunction generateRandomId() {\n    return randomMax8HexChars() + randomMax8HexChars();\n}\nfunction findMemoNodes(rootNode, appendToArray) {\n    if (!rootNode)\n        return;\n    if (rootNode.nodeType == 8) {\n        var memoId = parseMemoText(rootNode.nodeValue);\n        if (memoId != null)\n            appendToArray.push({ domNode: rootNode, memoId: memoId });\n    }\n    else if (rootNode.nodeType == 1) {\n        for (var i = 0, childNodes = rootNode.childNodes, j = childNodes.length; i < j; i++)\n            findMemoNodes(childNodes[i], appendToArray);\n    }\n}\nfunction memoize(callback) {\n    if (typeof callback != \"function\")\n        throw new Error(\"You can only pass a function to memoization.memoize()\");\n    var memoId = generateRandomId();\n    memos[memoId] = callback;\n    return \"<!--[ko_memo:\" + memoId + \"]-->\";\n}\nfunction unmemoize(memoId, callbackParams) {\n    var callback = memos[memoId];\n    if (callback === undefined)\n        throw new Error(\"Couldn't find any memo with ID \" + memoId + \". Perhaps it's already been unmemoized.\");\n    try {\n        callback.apply(null, callbackParams || []);\n        return true;\n    }\n    finally {\n        delete memos[memoId];\n    }\n}\nfunction unmemoizeDomNodeAndDescendants(domNode, extraCallbackParamsArray) {\n    var memos = [];\n    findMemoNodes(domNode, memos);\n    for (var i = 0, j = memos.length; i < j; i++) {\n        var node = memos[i].domNode;\n        var combinedParams = [node];\n        if (extraCallbackParamsArray)\n            arrayPushAll(combinedParams, extraCallbackParamsArray);\n        unmemoize(memos[i].memoId, combinedParams);\n        node.nodeValue = \"\"; // Neuter this node so we don't try to unmemoize it again\n        if (node.parentNode)\n            node.parentNode.removeChild(node); // If possible, erase it totally (not always possible - someone else might just hold a reference to it then call unmemoizeDomNodeAndDescendants again)\n    }\n}\nfunction parseMemoText(memoText) {\n    var match = memoText.match(/^\\[ko_memo\\:(.*?)\\]$/);\n    return match ? match[1] : null;\n}\n\n\n\nvar memoization = Object.freeze({\n\tmemoize: memoize,\n\tunmemoize: unmemoize,\n\tunmemoizeDomNodeAndDescendants: unmemoizeDomNodeAndDescendants,\n\tparseMemoText: parseMemoText\n});\n\n//\n//  Tasks Micro-scheduler\n//  ===\n//\n/* eslint no-cond-assign: 0 */\nvar taskQueue = [];\nvar taskQueueLength = 0;\nvar nextHandle = 1;\nvar nextIndexToProcess = 0;\nvar w = options.global;\nif (w && w.MutationObserver && !(w.navigator && w.navigator.standalone)) {\n    // Chrome 27+, Firefox 14+, IE 11+, Opera 15+, Safari 6.1+, node\n    // From https://github.com/petkaantonov/bluebird * Copyright (c) 2014 Petka Antonov * License: MIT\n    options.taskScheduler = (function (callback) {\n        var div = w.document.createElement(\"div\");\n        new MutationObserver(callback).observe(div, { attributes: true });\n        return function () { div.classList.toggle(\"foo\"); };\n    })(scheduledProcess);\n}\nelse if (w && w.document && \"onreadystatechange\" in w.document.createElement(\"script\")) {\n    // IE 6-10\n    // From https://github.com/YuzuJS/setImmediate * Copyright (c) 2012 Barnesandnoble.com, llc, Donavon West, and Domenic Denicola * License: MIT\n    options.taskScheduler = function (callback) {\n        var script = document.createElement(\"script\");\n        script.onreadystatechange = function () {\n            script.onreadystatechange = null;\n            document.documentElement.removeChild(script);\n            script = null;\n            callback();\n        };\n        document.documentElement.appendChild(script);\n    };\n}\nelse {\n    options.taskScheduler = function (callback) {\n        setTimeout(callback, 0);\n    };\n}\nfunction processTasks() {\n    if (taskQueueLength) {\n        // Each mark represents the end of a logical group of tasks and the number of these groups is\n        // limited to prevent unchecked recursion.\n        var mark = taskQueueLength, countMarks = 0;\n        // nextIndexToProcess keeps track of where we are in the queue; processTasks can be called recursively without issue\n        for (var task; nextIndexToProcess < taskQueueLength;) {\n            if (task = taskQueue[nextIndexToProcess++]) {\n                if (nextIndexToProcess > mark) {\n                    if (++countMarks >= 5000) {\n                        nextIndexToProcess = taskQueueLength; // skip all tasks remaining in the queue since any of them could be causing the recursion\n                        deferError(Error(\"'Too much recursion' after processing \" + countMarks + \" task groups.\"));\n                        break;\n                    }\n                    mark = taskQueueLength;\n                }\n                try {\n                    task();\n                }\n                catch (ex) {\n                    deferError(ex);\n                }\n            }\n        }\n    }\n}\nfunction scheduledProcess() {\n    processTasks();\n    // Reset the queue\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n}\nfunction scheduleTaskProcessing() {\n    options.taskScheduler(scheduledProcess);\n}\nfunction schedule(func) {\n    if (!taskQueueLength) {\n        scheduleTaskProcessing();\n    }\n    taskQueue[taskQueueLength++] = func;\n    return nextHandle++;\n}\nfunction cancel(handle) {\n    var index = handle - (nextHandle - taskQueueLength);\n    if (index >= nextIndexToProcess && index < taskQueueLength) {\n        taskQueue[index] = null;\n    }\n}\n// For testing only: reset the queue and return the previous queue length\nfunction resetForTesting() {\n    var length = taskQueueLength - nextIndexToProcess;\n    nextIndexToProcess = taskQueueLength = taskQueue.length = 0;\n    return length;\n}\n\n\nvar tasks = Object.freeze({\n\tschedule: schedule,\n\tcancel: cancel,\n\tresetForTesting: resetForTesting,\n\trunEarly: processTasks\n});\n\n/*\n  tko.util\n  ===\n\n\n*/\n// Sub-Modules;\n\nexport { tasks, virtualElements, data as domData, memoization, jQuerySetInstance, options, arrayForEach, arrayIndexOf, arrayFirst, arrayRemoveItem, arrayGetDistinctValues, arrayMap, arrayFilter, arrayPushAll, addOrRemoveItem, makeArray, range, findMovesInArrayComparison, compareArrays, throttle, debounce, catchFunctionErrors, deferError, safeSetTimeout, ieVersion, isIe6, isIe7, extend, objectForEach, objectMap, getObjectOwnProperty, clonePlainObjectDeep, canSetPrototype, setPrototypeOf, setPrototypeOfOrExtend, hasPrototype, stringTrim, stringStartsWith, parseJson, stringifyJson, useSymbols, createSymbolOrString, toggleDomNodeCssClass, registerEventHandler, triggerEvent, domNodeIsContainedBy, domNodeIsAttachedToDocument, anyDomNodeIsAttachedToDocument, tagNameLower, isDomElement, isDocumentFragment, moveCleanedNodesToContainerElement, cloneNodes, setDomNodeChildren, replaceDomNodes, setElementName, setTextContent, emptyDomNode, fixUpContinuousNodeArray, setOptionNodeSelectionState, forceRefresh, ensureSelectElementIsRenderedCorrectly, parseHtmlFragment, setHtml, addDisposeCallback, removeDisposeCallback, cleanNode, removeNode, otherNodeCleanerFunctions, cleanjQueryData };\n//# sourceMappingURL=tko.utils.js.map\n","import { arrayForEach, arrayIndexOf, arrayRemoveItem, canSetPrototype, compareArrays, createSymbolOrString, debounce, extend, findMovesInArrayComparison, hasPrototype, objectForEach, options, setPrototypeOf, setPrototypeOfOrExtend, stringifyJson, tasks, throttle } from 'tko.utils';\n\n//\n//  Defer Updates\n//  ===\n//\nfunction deferUpdates(target) {\n    if (!target._deferUpdates) {\n        target._deferUpdates = true;\n        target.limit(function (callback) {\n            var handle;\n            return function () {\n                tasks.cancel(handle);\n                handle = tasks.schedule(callback);\n                target.notifySubscribers(undefined, 'dirty');\n            };\n        });\n    }\n}\n\n//\n// Observable extenders\n// ---\n//\nvar primitiveTypes = {\n    'undefined': 1, 'boolean': 1, 'number': 1, 'string': 1\n};\nfunction valuesArePrimitiveAndEqual(a, b) {\n    var oldValueIsPrimitive = (a === null) || (typeof (a) in primitiveTypes);\n    return oldValueIsPrimitive ? (a === b) : false;\n}\nfunction applyExtenders(requestedExtenders) {\n    var target = this;\n    if (requestedExtenders) {\n        objectForEach(requestedExtenders, function (key, value) {\n            var extenderHandler = extenders[key];\n            if (typeof extenderHandler === 'function') {\n                target = extenderHandler(target, value) || target;\n            }\n            else {\n                options.onError(new Error('Extender not found: ' + key));\n            }\n        });\n    }\n    return target;\n}\n/*\n                --- DEFAULT EXTENDERS ---\n */\n// Change when notifications are published.\nfunction notify(target, notifyWhen) {\n    target.equalityComparer = notifyWhen == 'always' ?\n        null : // null equalityComparer means to always notify\n        valuesArePrimitiveAndEqual;\n}\nfunction deferred(target, option) {\n    if (option !== true) {\n        throw new Error('The \\'deferred\\' extender only accepts the value \\'true\\', because it is not supported to turn deferral off once enabled.');\n    }\n    deferUpdates(target);\n}\nfunction rateLimit(target, options$$1) {\n    var timeout, method, limitFunction;\n    if (typeof options$$1 === 'number') {\n        timeout = options$$1;\n    }\n    else {\n        timeout = options$$1.timeout;\n        method = options$$1.method;\n    }\n    // rateLimit supersedes deferred updates\n    target._deferUpdates = false;\n    limitFunction = method == 'notifyWhenChangesStop' ? debounce : throttle;\n    target.limit(function (callback) {\n        return limitFunction(callback, timeout);\n    });\n}\nvar extenders = {\n    notify: notify,\n    deferred: deferred,\n    rateLimit: rateLimit\n};\n\n/* eslint no-cond-assign: 0 */\nfunction subscription(target, callback, disposeCallback) {\n    this._target = target;\n    this.callback = callback;\n    this.disposeCallback = disposeCallback;\n    this.isDisposed = false;\n}\nsubscription.prototype.dispose = function () {\n    this.isDisposed = true;\n    this.disposeCallback();\n};\nfunction subscribable() {\n    setPrototypeOfOrExtend(this, ko_subscribable_fn);\n    ko_subscribable_fn.init(this);\n}\nvar defaultEvent = 'change';\nvar ko_subscribable_fn = {\n    init: function (instance) {\n        instance._subscriptions = {};\n        instance._versionNumber = 1;\n    },\n    subscribe: function (callback, callbackTarget, event) {\n        var self = this;\n        event = event || defaultEvent;\n        var boundCallback = callbackTarget ? callback.bind(callbackTarget) : callback;\n        var subscriptionInstance = new subscription(self, boundCallback, function () {\n            arrayRemoveItem(self._subscriptions[event], subscriptionInstance);\n            if (self.afterSubscriptionRemove) {\n                self.afterSubscriptionRemove(event);\n            }\n        });\n        if (self.beforeSubscriptionAdd) {\n            self.beforeSubscriptionAdd(event);\n        }\n        if (!self._subscriptions[event]) {\n            self._subscriptions[event] = [];\n        }\n        self._subscriptions[event].push(subscriptionInstance);\n        return subscriptionInstance;\n    },\n    notifySubscribers: function (valueToNotify, event) {\n        event = event || defaultEvent;\n        if (event === defaultEvent) {\n            this.updateVersion();\n        }\n        if (this.hasSubscriptionsForEvent(event)) {\n            try {\n                begin(); // Begin suppressing dependency detection (by setting the top frame to undefined)\n                for (var a = this._subscriptions[event].slice(0), i = 0, subscriptionInstance; subscriptionInstance = a[i]; ++i) {\n                    // In case a subscription was disposed during the arrayForEach cycle, check\n                    // for isDisposed on each subscription before invoking its callback\n                    if (!subscriptionInstance.isDisposed) {\n                        subscriptionInstance.callback(valueToNotify);\n                    }\n                }\n            }\n            finally {\n                end(); // End suppressing dependency detection\n            }\n        }\n    },\n    getVersion: function () {\n        return this._versionNumber;\n    },\n    hasChanged: function (versionToCheck) {\n        return this.getVersion() !== versionToCheck;\n    },\n    updateVersion: function () {\n        ++this._versionNumber;\n    },\n    hasSubscriptionsForEvent: function (event) {\n        return this._subscriptions[event] && this._subscriptions[event].length;\n    },\n    getSubscriptionsCount: function (event) {\n        if (event) {\n            return this._subscriptions[event] && this._subscriptions[event].length || 0;\n        }\n        else {\n            var total = 0;\n            objectForEach(this._subscriptions, function (eventName, subscriptions) {\n                if (eventName !== 'dirty') {\n                    total += subscriptions.length;\n                }\n            });\n            return total;\n        }\n    },\n    isDifferent: function (oldValue, newValue) {\n        return !this.equalityComparer ||\n            !this.equalityComparer(oldValue, newValue);\n    },\n    once: function (cb) {\n        var subs = this.subscribe(function (nv) {\n            subs.dispose();\n            cb(nv);\n        });\n    },\n    when: function (test, returnValue) {\n        var _this = this;\n        var current = this.peek();\n        var givenRv = arguments.length > 1;\n        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };\n        if (testFn(current)) {\n            return options.Promise.resolve(givenRv ? returnValue : current);\n        }\n        return new options.Promise(function (resolve, reject) {\n            var subs = _this.subscribe(function (newValue) {\n                if (testFn(newValue)) {\n                    subs.dispose();\n                    resolve(givenRv ? returnValue : newValue);\n                }\n            });\n        });\n    },\n    yet: function (test) {\n        var args = [];\n        for (var _i = 1; _i < arguments.length; _i++) {\n            args[_i - 1] = arguments[_i];\n        }\n        var testFn = typeof test === 'function' ? test : function (v) { return v === test; };\n        var negated = function (v) { return !testFn(v); };\n        return this.when.apply(this, [negated].concat(args));\n    },\n    next: function () {\n        var _this = this;\n        return new Promise(function (resolve) { return _this.once(resolve); });\n    },\n    extend: applyExtenders\n};\n// For browsers that support proto assignment, we overwrite the prototype of each\n// observable instance. Since observables are functions, we need Function.prototype\n// to still be in the prototype chain.\nif (canSetPrototype) {\n    setPrototypeOf(ko_subscribable_fn, Function.prototype);\n}\nsubscribable.fn = ko_subscribable_fn;\nfunction isSubscribable(instance) {\n    return instance != null && typeof instance.subscribe === 'function' && typeof instance.notifySubscribers === 'function';\n}\n\n//\n// dependencyDetection\n// ---\n//\n// In KO 3.x, dependencyDetection was also known as computedContext.\n//\nvar outerFrames = [];\nvar currentFrame;\nvar lastId = 0;\n// Return a unique ID that can be assigned to an observable for dependency tracking.\n// Theoretically, you could eventually overflow the number storage size, resulting\n// in duplicate IDs. But in JavaScript, the largest exact integral value is 2^53\n// or 9,007,199,254,740,992. If you created 1,000,000 IDs per second, it would\n// take over 285 years to reach that number.\n// Reference http://blog.vjeux.com/2010/javascript/javascript-max_int-number-limits.html\nfunction getId() {\n    return ++lastId;\n}\nfunction begin(options$$1) {\n    outerFrames.push(currentFrame);\n    currentFrame = options$$1;\n}\nfunction end() {\n    currentFrame = outerFrames.pop();\n}\nfunction registerDependency(subscribable$$1) {\n    if (currentFrame) {\n        if (!isSubscribable(subscribable$$1)) {\n            throw new Error('Only subscribable things can act as dependencies');\n        }\n        currentFrame.callback.call(currentFrame.callbackTarget, subscribable$$1, subscribable$$1._id || (subscribable$$1._id = getId()));\n    }\n}\nfunction ignore(callback, callbackTarget, callbackArgs) {\n    try {\n        begin();\n        return callback.apply(callbackTarget, callbackArgs || []);\n    }\n    finally {\n        end();\n    }\n}\nfunction getDependenciesCount() {\n    if (currentFrame) {\n        return currentFrame.computed.getDependenciesCount();\n    }\n}\nfunction isInitial() {\n    if (currentFrame) {\n        return currentFrame.isInitial;\n    }\n}\n\n\nvar dependencyDetection = Object.freeze({\n\tbegin: begin,\n\tend: end,\n\tregisterDependency: registerDependency,\n\tignore: ignore,\n\tgetDependenciesCount: getDependenciesCount,\n\tisInitial: isInitial,\n\tignoreDependencies: ignore\n});\n\n//\n//  Observable values\n//  ---\n//\nvar observableLatestValue = createSymbolOrString('_latestValue');\nfunction observable(initialValue) {\n    function Observable() {\n        if (arguments.length > 0) {\n            // Write\n            // Ignore writes if the value hasn't changed\n            if (Observable.isDifferent(Observable[observableLatestValue], arguments[0])) {\n                Observable.valueWillMutate();\n                Observable[observableLatestValue] = arguments[0];\n                Observable.valueHasMutated();\n            }\n            return this; // Permits chained assignments\n        }\n        else {\n            // Read\n            registerDependency(Observable); // The caller only needs to be notified of changes if they did a \"read\" operation\n            return Observable[observableLatestValue];\n        }\n    }\n    Observable[observableLatestValue] = initialValue;\n    // Inherit from 'subscribable'\n    if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n        extend(Observable, subscribable.fn);\n    }\n    subscribable.fn.init(Observable);\n    // Inherit from 'observable'\n    setPrototypeOfOrExtend(Observable, observable.fn);\n    if (options.deferUpdates) {\n        deferUpdates(Observable);\n    }\n    return Observable;\n}\n// Define prototype for observables\nobservable.fn = {\n    equalityComparer: valuesArePrimitiveAndEqual,\n    peek: function () { return this[observableLatestValue]; },\n    valueHasMutated: function () { this.notifySubscribers(this[observableLatestValue]); },\n    valueWillMutate: function () {\n        this.notifySubscribers(this[observableLatestValue], 'beforeChange');\n    },\n    then: function (res, rej) { try {\n        res(this());\n    }\n    catch (e) {\n        rej(e);\n    } }\n};\n// Moved out of \"limit\" to avoid the extra closure\nfunction limitNotifySubscribers(value, event) {\n    if (!event || event === defaultEvent) {\n        this._limitChange(value);\n    }\n    else if (event === 'beforeChange') {\n        this._limitBeforeChange(value);\n    }\n    else {\n        this._origNotifySubscribers(value, event);\n    }\n}\n// Add `limit` function to the subscribable prototype\nsubscribable.fn.limit = function limit(limitFunction) {\n    var self = this;\n    var selfIsObservable = isObservable(self);\n    var beforeChange = 'beforeChange';\n    var ignoreBeforeChange, previousValue, pendingValue;\n    if (!self._origNotifySubscribers) {\n        self._origNotifySubscribers = self.notifySubscribers;\n        self.notifySubscribers = limitNotifySubscribers;\n    }\n    var finish = limitFunction(function () {\n        self._notificationIsPending = false;\n        // If an observable provided a reference to itself, access it to get the latest value.\n        // This allows computed observables to delay calculating their value until needed.\n        if (selfIsObservable && pendingValue === self) {\n            pendingValue = self();\n        }\n        ignoreBeforeChange = false;\n        if (self.isDifferent(previousValue, pendingValue)) {\n            self._origNotifySubscribers(previousValue = pendingValue);\n        }\n    });\n    self._limitChange = function (value) {\n        self._notificationIsPending = ignoreBeforeChange = true;\n        pendingValue = value;\n        finish();\n    };\n    self._limitBeforeChange = function (value) {\n        if (!ignoreBeforeChange) {\n            previousValue = value;\n            self._origNotifySubscribers(value, beforeChange);\n        }\n    };\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the observable constructor\nif (canSetPrototype) {\n    setPrototypeOf(observable.fn, subscribable.fn);\n}\nvar protoProperty = observable.protoProperty = options.protoProperty;\nobservable.fn[protoProperty] = observable;\nfunction isObservable(instance) {\n    return hasPrototype(instance, observable);\n}\nfunction unwrap(value) {\n    return isObservable(value) ? value() : value;\n}\nfunction peek(value) {\n    return isObservable(value) ? value.peek() : value;\n}\nfunction isWriteableObservable(instance) {\n    // Observable\n    if ((typeof instance === 'function') && instance[protoProperty] === observable) {\n        return true;\n    }\n    // Writeable dependent observable\n    if ((typeof instance === 'function') /* && (instance[protoProperty] === ko.dependentObservable) */ && (instance.hasWriteFunction)) {\n        return true;\n    }\n    // Anything else\n    return false;\n}\n\n//\n// Observable Array - Change Tracking Extender\n// ---\n//\n/* eslint no-fallthrough: 0*/\nvar arrayChangeEventName = 'arrayChange';\nfunction trackArrayChanges(target, options$$1) {\n    // Use the provided options--each call to trackArrayChanges overwrites the previously set options\n    target.compareArrayOptions = {};\n    if (options$$1 && typeof options$$1 == \"object\") {\n        extend(target.compareArrayOptions, options$$1);\n    }\n    target.compareArrayOptions.sparse = true;\n    // Only modify the target observable once\n    if (target.cacheDiffForKnownOperation) {\n        return;\n    }\n    var trackingChanges = false, cachedDiff = null, arrayChangeSubscription, pendingNotifications = 0, underlyingBeforeSubscriptionAddFunction = target.beforeSubscriptionAdd, underlyingAfterSubscriptionRemoveFunction = target.afterSubscriptionRemove;\n    // Watch \"subscribe\" calls, and for array change events, ensure change tracking is enabled\n    target.beforeSubscriptionAdd = function (event) {\n        if (underlyingBeforeSubscriptionAddFunction)\n            underlyingBeforeSubscriptionAddFunction.call(target, event);\n        if (event === arrayChangeEventName) {\n            trackChanges();\n        }\n    };\n    // Watch \"dispose\" calls, and for array change events, ensure change tracking is disabled when all are disposed\n    target.afterSubscriptionRemove = function (event) {\n        if (underlyingAfterSubscriptionRemoveFunction)\n            underlyingAfterSubscriptionRemoveFunction.call(target, event);\n        if (event === arrayChangeEventName && !target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n            if (arrayChangeSubscription) {\n                arrayChangeSubscription.dispose();\n            }\n            arrayChangeSubscription = null;\n            trackingChanges = false;\n        }\n    };\n    function trackChanges() {\n        // Calling 'trackChanges' multiple times is the same as calling it once\n        if (trackingChanges) {\n            return;\n        }\n        trackingChanges = true;\n        // Intercept \"notifySubscribers\" to track how many times it was called.\n        var underlyingNotifySubscribersFunction = target['notifySubscribers'];\n        target['notifySubscribers'] = function (valueToNotify, event) {\n            if (!event || event === defaultEvent) {\n                ++pendingNotifications;\n            }\n            return underlyingNotifySubscribersFunction.apply(this, arguments);\n        };\n        // Each time the array changes value, capture a clone so that on the next\n        // change it's possible to produce a diff\n        var previousContents = [].concat(target.peek() || []);\n        cachedDiff = null;\n        arrayChangeSubscription = target.subscribe(function (currentContents) {\n            // Make a copy of the current contents and ensure it's an array\n            currentContents = [].concat(currentContents || []);\n            // Compute the diff and issue notifications, but only if someone is listening\n            if (target.hasSubscriptionsForEvent(arrayChangeEventName)) {\n                var changes = getChanges(previousContents, currentContents);\n            }\n            // Eliminate references to the old, removed items, so they can be GCed\n            previousContents = currentContents;\n            cachedDiff = null;\n            pendingNotifications = 0;\n            if (changes && changes.length) {\n                target['notifySubscribers'](changes, arrayChangeEventName);\n            }\n        });\n    }\n    function getChanges(previousContents, currentContents) {\n        // We try to re-use cached diffs.\n        // The scenarios where pendingNotifications > 1 are when using rate-limiting or the Deferred Updates\n        // plugin, which without this check would not be compatible with arrayChange notifications. Normally,\n        // notifications are issued immediately so we wouldn't be queueing up more than one.\n        if (!cachedDiff || pendingNotifications > 1) {\n            cachedDiff = trackArrayChanges.compareArrays(previousContents, currentContents, target.compareArrayOptions);\n        }\n        return cachedDiff;\n    }\n    target.cacheDiffForKnownOperation = function (rawArray, operationName, args) {\n        var index, argsIndex;\n        // Only run if we're currently tracking changes for this observable array\n        // and there aren't any pending deferred notifications.\n        if (!trackingChanges || pendingNotifications) {\n            return;\n        }\n        var diff = [], arrayLength = rawArray.length, argsLength = args.length, offset = 0;\n        function pushDiff(status, value, index) {\n            return diff[diff.length] = { 'status': status, 'value': value, 'index': index };\n        }\n        switch (operationName) {\n            case 'push':\n                offset = arrayLength;\n            case 'unshift':\n                for (index = 0; index < argsLength; index++) {\n                    pushDiff('added', args[index], offset + index);\n                }\n                break;\n            case 'pop':\n                offset = arrayLength - 1;\n            case 'shift':\n                if (arrayLength) {\n                    pushDiff('deleted', rawArray[offset], offset);\n                }\n                break;\n            case 'splice':\n                // Negative start index means 'from end of array'. After that we clamp to [0...arrayLength].\n                // See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/splice\n                var startIndex = Math.min(Math.max(0, args[0] < 0 ? arrayLength + args[0] : args[0]), arrayLength), endDeleteIndex = argsLength === 1 ? arrayLength : Math.min(startIndex + (args[1] || 0), arrayLength), endAddIndex = startIndex + argsLength - 2, endIndex = Math.max(endDeleteIndex, endAddIndex), additions = [], deletions = [];\n                for (index = startIndex, argsIndex = 2; index < endIndex; ++index, ++argsIndex) {\n                    if (index < endDeleteIndex)\n                        deletions.push(pushDiff('deleted', rawArray[index], index));\n                    if (index < endAddIndex)\n                        additions.push(pushDiff('added', args[argsIndex], index));\n                }\n                findMovesInArrayComparison(deletions, additions);\n                break;\n            default:\n                return;\n        }\n        cachedDiff = diff;\n    };\n}\n// Expose compareArrays for testing.\ntrackArrayChanges.compareArrays = compareArrays;\n// Add the trackArrayChanges extender so we can use\n// obs.extend({ trackArrayChanges: true })\nextenders.trackArrayChanges = trackArrayChanges;\n\n//\n// Observable Arrays\n// ===\n//\nfunction observableArray(initialValues) {\n    initialValues = initialValues || [];\n    if (typeof initialValues !== 'object' || !('length' in initialValues)) {\n        throw new Error('The argument passed when initializing an observable array must be an array, or null, or undefined.');\n    }\n    var result = observable(initialValues);\n    setPrototypeOfOrExtend(result, observableArray.fn);\n    trackArrayChanges(result);\n    // ^== result.extend({ trackArrayChanges: true })\n    return result;\n}\nobservableArray.fn = {\n    remove: function (valueOrPredicate) {\n        var underlyingArray = this.peek();\n        var removedValues = [];\n        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\n        for (var i = 0; i < underlyingArray.length; i++) {\n            var value = underlyingArray[i];\n            if (predicate(value)) {\n                if (removedValues.length === 0) {\n                    this.valueWillMutate();\n                }\n                removedValues.push(value);\n                underlyingArray.splice(i, 1);\n                i--;\n            }\n        }\n        if (removedValues.length) {\n            this.valueHasMutated();\n        }\n        return removedValues;\n    },\n    removeAll: function (arrayOfValues) {\n        // If you passed zero args, we remove everything\n        if (arrayOfValues === undefined) {\n            var underlyingArray = this.peek();\n            var allValues = underlyingArray.slice(0);\n            this.valueWillMutate();\n            underlyingArray.splice(0, underlyingArray.length);\n            this.valueHasMutated();\n            return allValues;\n        }\n        // If you passed an arg, we interpret it as an array of entries to remove\n        if (!arrayOfValues) {\n            return [];\n        }\n        return this['remove'](function (value) {\n            return arrayIndexOf(arrayOfValues, value) >= 0;\n        });\n    },\n    destroy: function (valueOrPredicate) {\n        var underlyingArray = this.peek();\n        var predicate = typeof valueOrPredicate === 'function' && !isObservable(valueOrPredicate) ? valueOrPredicate : function (value) { return value === valueOrPredicate; };\n        this.valueWillMutate();\n        for (var i = underlyingArray.length - 1; i >= 0; i--) {\n            var value = underlyingArray[i];\n            if (predicate(value)) {\n                underlyingArray[i]['_destroy'] = true;\n            }\n        }\n        this.valueHasMutated();\n    },\n    destroyAll: function (arrayOfValues) {\n        // If you passed zero args, we destroy everything\n        if (arrayOfValues === undefined) {\n            return this.destroy(function () { return true; });\n        }\n        // If you passed an arg, we interpret it as an array of entries to destroy\n        if (!arrayOfValues) {\n            return [];\n        }\n        return this.destroy(function (value) {\n            return arrayIndexOf(arrayOfValues, value) >= 0;\n        });\n    },\n    indexOf: function (item) {\n        var underlyingArray = this();\n        return arrayIndexOf(underlyingArray, item);\n    },\n    replace: function (oldItem, newItem) {\n        var index = this.indexOf(oldItem);\n        if (index >= 0) {\n            this.valueWillMutate();\n            this.peek()[index] = newItem;\n            this.valueHasMutated();\n        }\n    }\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.observableArray constructor\nif (canSetPrototype) {\n    setPrototypeOf(observableArray.fn, observable.fn);\n}\n// Populate ko.observableArray.fn with read/write functions from native arrays\n// Important: Do not add any additional functions here that may reasonably be used to *read* data from the array\n// because we'll eval them without causing subscriptions, so ko.computed output could end up getting stale\narrayForEach(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {\n    observableArray.fn[methodName] = function () {\n        // Use \"peek\" to avoid creating a subscription in any computed that we're executing in the context of\n        // (for consistency with mutating regular observables)\n        var underlyingArray = this.peek();\n        this.valueWillMutate();\n        this.cacheDiffForKnownOperation(underlyingArray, methodName, arguments);\n        var methodCallResult = underlyingArray[methodName].apply(underlyingArray, arguments);\n        this.valueHasMutated();\n        // The native sort and reverse methods return a reference to the array, but it makes more sense to return the observable array instead.\n        return methodCallResult === underlyingArray ? this : methodCallResult;\n    };\n});\n// Populate ko.observableArray.fn with read-only functions from native arrays\narrayForEach(['slice'], function (methodName) {\n    observableArray.fn[methodName] = function () {\n        var underlyingArray = this();\n        return underlyingArray[methodName].apply(underlyingArray, arguments);\n    };\n});\n\n//\n// Helpers\n// ---\n// toJS & toJSON\n//\nvar maxNestedObservableDepth = 10; // Escape the (unlikely) pathalogical case where an observable's current value is itself (or similar reference cycle)\nfunction toJS(rootObject) {\n    if (arguments.length == 0)\n        throw new Error(\"When calling ko.toJS, pass the object you want to convert.\");\n    // We just unwrap everything at every level in the object graph\n    return mapJsObjectGraph(rootObject, function (valueToMap) {\n        // Loop because an observable's value might in turn be another observable wrapper\n        for (var i = 0; isObservable(valueToMap) && (i < maxNestedObservableDepth); i++)\n            valueToMap = valueToMap();\n        return valueToMap;\n    });\n}\nfunction toJSON(rootObject, replacer, space) {\n    var plainJavaScriptObject = toJS(rootObject);\n    return stringifyJson(plainJavaScriptObject, replacer, space);\n}\nfunction mapJsObjectGraph(rootObject, mapInputCallback, visitedObjects) {\n    visitedObjects = visitedObjects || new objectLookup();\n    rootObject = mapInputCallback(rootObject);\n    var canHaveProperties = (typeof rootObject == \"object\") && (rootObject !== null) && (rootObject !== undefined) && (!(rootObject instanceof RegExp)) && (!(rootObject instanceof Date)) && (!(rootObject instanceof String)) && (!(rootObject instanceof Number)) && (!(rootObject instanceof Boolean));\n    if (!canHaveProperties)\n        return rootObject;\n    var outputProperties = rootObject instanceof Array ? [] : {};\n    visitedObjects.save(rootObject, outputProperties);\n    visitPropertiesOrArrayEntries(rootObject, function (indexer) {\n        var propertyValue = mapInputCallback(rootObject[indexer]);\n        switch (typeof propertyValue) {\n            case \"boolean\":\n            case \"number\":\n            case \"string\":\n            case \"function\":\n                outputProperties[indexer] = propertyValue;\n                break;\n            case \"object\":\n            case \"undefined\":\n                var previouslyMappedValue = visitedObjects.get(propertyValue);\n                outputProperties[indexer] = (previouslyMappedValue !== undefined)\n                    ? previouslyMappedValue\n                    : mapJsObjectGraph(propertyValue, mapInputCallback, visitedObjects);\n                break;\n        }\n    });\n    return outputProperties;\n}\nfunction visitPropertiesOrArrayEntries(rootObject, visitorCallback) {\n    if (rootObject instanceof Array) {\n        for (var i = 0; i < rootObject.length; i++)\n            visitorCallback(i);\n        // For arrays, also respect toJSON property for custom mappings (fixes #278)\n        if (typeof rootObject['toJSON'] == 'function')\n            visitorCallback('toJSON');\n    }\n    else {\n        for (var propertyName in rootObject) {\n            visitorCallback(propertyName);\n        }\n    }\n}\nfunction objectLookup() {\n    this.keys = [];\n    this.values = [];\n}\nobjectLookup.prototype = {\n    constructor: objectLookup,\n    save: function (key, value) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        if (existingIndex >= 0)\n            this.values[existingIndex] = value;\n        else {\n            this.keys.push(key);\n            this.values.push(value);\n        }\n    },\n    get: function (key) {\n        var existingIndex = arrayIndexOf(this.keys, key);\n        return (existingIndex >= 0) ? this.values[existingIndex] : undefined;\n    }\n};\n\n//\n// Observables.\n// ---\n//\n// The following are added to the root `[t]ko` object.\n//\n\nexport { dependencyDetection, observable, isObservable, unwrap, peek, isWriteableObservable, isWriteableObservable as isWritableObservable, isSubscribable, subscribable, observableArray, trackArrayChanges, arrayChangeEventName, toJS, toJSON, deferUpdates, valuesArePrimitiveAndEqual, applyExtenders, extenders };\n//# sourceMappingURL=tko.observable.js.map\n","import { addDisposeCallback, arrayForEach, canSetPrototype, createSymbolOrString, domNodeIsAttachedToDocument, extend, hasPrototype, objectForEach, options, removeDisposeCallback, safeSetTimeout, setPrototypeOf, setPrototypeOfOrExtend } from 'tko.utils';\nimport { dependencyDetection, extenders, observable, subscribable, valuesArePrimitiveAndEqual } from 'tko.observable';\n\n//\n// Computed Observable Values\n//\n// (before tko, `computed` was also known as `dependentObservable`)\n//\nvar computedState = createSymbolOrString('_state');\nfunction computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, options$$1) {\n    if (typeof evaluatorFunctionOrOptions === 'object') {\n        // Single-parameter syntax - everything is on this \"options\" param\n        options$$1 = evaluatorFunctionOrOptions;\n    }\n    else {\n        // Multi-parameter syntax - construct the options according to the params passed\n        options$$1 = options$$1 || {};\n        if (evaluatorFunctionOrOptions) {\n            options$$1.read = evaluatorFunctionOrOptions;\n        }\n    }\n    if (typeof options$$1.read !== 'function') {\n        throw Error('Pass a function that returns the value of the computed');\n    }\n    var writeFunction = options$$1.write;\n    var state = {\n        latestValue: undefined,\n        isStale: true,\n        isBeingEvaluated: false,\n        suppressDisposalUntilDisposeWhenReturnsFalse: false,\n        isDisposed: false,\n        pure: false,\n        isSleeping: false,\n        readFunction: options$$1.read,\n        evaluatorFunctionTarget: evaluatorFunctionTarget || options$$1.owner,\n        disposeWhenNodeIsRemoved: options$$1.disposeWhenNodeIsRemoved || options$$1.disposeWhenNodeIsRemoved || null,\n        disposeWhen: options$$1.disposeWhen || options$$1.disposeWhen,\n        domNodeDisposalCallback: null,\n        dependencyTracking: {},\n        dependenciesCount: 0,\n        evaluationTimeoutInstance: null\n    };\n    function computedObservable() {\n        if (arguments.length > 0) {\n            if (typeof writeFunction === 'function') {\n                // Writing a value\n                writeFunction.apply(state.evaluatorFunctionTarget, arguments);\n            }\n            else {\n                throw new Error(\"Cannot write a value to a computed unless you specify a 'write' option. If you wish to read the current value, don't pass any parameters.\");\n            }\n            return this; // Permits chained assignments\n        }\n        else {\n            // Reading the value\n            dependencyDetection.registerDependency(computedObservable);\n            if (state.isStale || (state.isSleeping && computedObservable.haveDependenciesChanged())) {\n                computedObservable.evaluateImmediate();\n            }\n            return state.latestValue;\n        }\n    }\n    computedObservable[computedState] = state;\n    computedObservable.hasWriteFunction = typeof writeFunction === 'function';\n    // Inherit from 'subscribable'\n    if (!canSetPrototype) {\n        // 'subscribable' won't be on the prototype chain unless we put it there directly\n        extend(computedObservable, subscribable.fn);\n    }\n    subscribable.fn.init(computedObservable);\n    // Inherit from 'computed'\n    setPrototypeOfOrExtend(computedObservable, computed.fn);\n    if (options$$1.pure) {\n        state.pure = true;\n        state.isSleeping = true; // Starts off sleeping; will awake on the first subscription\n        extend(computedObservable, pureComputedOverrides);\n    }\n    else if (options$$1.deferEvaluation) {\n        extend(computedObservable, deferEvaluationOverrides);\n    }\n    if (options.deferUpdates) {\n        extenders.deferred(computedObservable, true);\n    }\n    if (options.debug) {\n        // #1731 - Aid debugging by exposing the computed's options\n        computedObservable._options = options$$1;\n    }\n    if (state.disposeWhenNodeIsRemoved) {\n        // Since this computed is associated with a DOM node, and we don't want to dispose the computed\n        // until the DOM node is *removed* from the document (as opposed to never having been in the document),\n        // we'll prevent disposal until \"disposeWhen\" first returns false.\n        state.suppressDisposalUntilDisposeWhenReturnsFalse = true;\n        // disposeWhenNodeIsRemoved: true can be used to opt into the \"only dispose after first false result\"\n        // behaviour even if there's no specific node to watch. In that case, clear the option so we don't try\n        // to watch for a non-node's disposal. This technique is intended for KO's internal use only and shouldn't\n        // be documented or used by application code, as it's likely to change in a future version of KO.\n        if (!state.disposeWhenNodeIsRemoved.nodeType) {\n            state.disposeWhenNodeIsRemoved = null;\n        }\n    }\n    // Evaluate, unless sleeping or deferEvaluation is true\n    if (!state.isSleeping && !options$$1.deferEvaluation) {\n        computedObservable.evaluateImmediate();\n    }\n    // Attach a DOM node disposal callback so that the computed will be proactively disposed as soon as the node is\n    // removed using ko.removeNode. But skip if isActive is false (there will never be any dependencies to dispose).\n    if (state.disposeWhenNodeIsRemoved && computedObservable.isActive()) {\n        addDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback = function () {\n            computedObservable.dispose();\n        });\n    }\n    return computedObservable;\n}\n// Utility function that disposes a given dependencyTracking entry\nfunction computedDisposeDependencyCallback(id, entryToDispose) {\n    if (entryToDispose !== null && entryToDispose.dispose) {\n        entryToDispose.dispose();\n    }\n}\n// This function gets called each time a dependency is detected while evaluating a computed.\n// It's factored out as a shared function to avoid creating unnecessary function instances during evaluation.\nfunction computedBeginDependencyDetectionCallback(subscribable$$1, id) {\n    var computedObservable = this.computedObservable, state = computedObservable[computedState];\n    if (!state.isDisposed) {\n        if (this.disposalCount && this.disposalCandidates[id]) {\n            // Don't want to dispose this subscription, as it's still being used\n            computedObservable.addDependencyTracking(id, subscribable$$1, this.disposalCandidates[id]);\n            this.disposalCandidates[id] = null; // No need to actually delete the property - disposalCandidates is a transient object anyway\n            --this.disposalCount;\n        }\n        else if (!state.dependencyTracking[id]) {\n            // Brand new subscription - add it\n            computedObservable.addDependencyTracking(id, subscribable$$1, state.isSleeping ? { _target: subscribable$$1 } : computedObservable.subscribeToDependency(subscribable$$1));\n        }\n    }\n}\ncomputed.fn = {\n    equalityComparer: valuesArePrimitiveAndEqual,\n    getDependenciesCount: function () {\n        return this[computedState].dependenciesCount;\n    },\n    addDependencyTracking: function (id, target, trackingObj) {\n        if (this[computedState].pure && target === this) {\n            throw Error(\"A 'pure' computed must not be called recursively\");\n        }\n        this[computedState].dependencyTracking[id] = trackingObj;\n        trackingObj._order = this[computedState].dependenciesCount++;\n        trackingObj._version = target.getVersion();\n    },\n    haveDependenciesChanged: function () {\n        var id, dependency, dependencyTracking = this[computedState].dependencyTracking;\n        for (id in dependencyTracking) {\n            if (dependencyTracking.hasOwnProperty(id)) {\n                dependency = dependencyTracking[id];\n                if (dependency._target.hasChanged(dependency._version)) {\n                    return true;\n                }\n            }\n        }\n    },\n    markDirty: function () {\n        // Process \"dirty\" events if we can handle delayed notifications\n        if (this._evalDelayed && !this[computedState].isBeingEvaluated) {\n            this._evalDelayed();\n        }\n    },\n    isActive: function () {\n        return this[computedState].isStale || this[computedState].dependenciesCount > 0;\n    },\n    respondToChange: function () {\n        // Ignore \"change\" events if we've already scheduled a delayed notification\n        if (!this._notificationIsPending) {\n            this.evaluatePossiblyAsync();\n        }\n    },\n    subscribeToDependency: function (target) {\n        if (target._deferUpdates && !this[computedState].disposeWhenNodeIsRemoved) {\n            var dirtySub = target.subscribe(this.markDirty, this, 'dirty'), changeSub = target.subscribe(this.respondToChange, this);\n            return {\n                _target: target,\n                dispose: function () {\n                    dirtySub.dispose();\n                    changeSub.dispose();\n                }\n            };\n        }\n        else {\n            return target.subscribe(this.evaluatePossiblyAsync, this);\n        }\n    },\n    evaluatePossiblyAsync: function () {\n        var computedObservable = this, throttleEvaluationTimeout = computedObservable.throttleEvaluation;\n        if (throttleEvaluationTimeout && throttleEvaluationTimeout >= 0) {\n            clearTimeout(this[computedState].evaluationTimeoutInstance);\n            this[computedState].evaluationTimeoutInstance = safeSetTimeout(function () {\n                computedObservable.evaluateImmediate(true /* notifyChange */);\n            }, throttleEvaluationTimeout);\n        }\n        else if (computedObservable._evalDelayed) {\n            computedObservable._evalDelayed();\n        }\n        else {\n            computedObservable.evaluateImmediate(true /* notifyChange */);\n        }\n    },\n    evaluateImmediate: function (notifyChange) {\n        var computedObservable = this, state = computedObservable[computedState], disposeWhen = state.disposeWhen;\n        if (state.isBeingEvaluated) {\n            // If the evaluation of a ko.computed causes side effects, it's possible that it will trigger its own re-evaluation.\n            // This is not desirable (it's hard for a developer to realise a chain of dependencies might cause this, and they almost\n            // certainly didn't intend infinite re-evaluations). So, for predictability, we simply prevent ko.computeds from causing\n            // their own re-evaluation. Further discussion at https://github.com/SteveSanderson/knockout/pull/387\n            return;\n        }\n        // Do not evaluate (and possibly capture new dependencies) if disposed\n        if (state.isDisposed) {\n            return;\n        }\n        if (state.disposeWhenNodeIsRemoved && !domNodeIsAttachedToDocument(state.disposeWhenNodeIsRemoved) || disposeWhen && disposeWhen()) {\n            // See comment above about suppressDisposalUntilDisposeWhenReturnsFalse\n            if (!state.suppressDisposalUntilDisposeWhenReturnsFalse) {\n                computedObservable.dispose();\n                return;\n            }\n        }\n        else {\n            // It just did return false, so we can stop suppressing now\n            state.suppressDisposalUntilDisposeWhenReturnsFalse = false;\n        }\n        state.isBeingEvaluated = true;\n        try {\n            this.evaluateImmediate_CallReadWithDependencyDetection(notifyChange);\n        }\n        finally {\n            state.isBeingEvaluated = false;\n        }\n        if (!state.dependenciesCount) {\n            computedObservable.dispose();\n        }\n    },\n    evaluateImmediate_CallReadWithDependencyDetection: function (notifyChange) {\n        // This function is really just part of the evaluateImmediate logic. You would never call it from anywhere else.\n        // Factoring it out into a separate function means it can be independent of the try/catch block in evaluateImmediate,\n        // which contributes to saving about 40% off the CPU overhead of computed evaluation (on V8 at least).\n        var computedObservable = this, state = computedObservable[computedState];\n        // Initially, we assume that none of the subscriptions are still being used (i.e., all are candidates for disposal).\n        // Then, during evaluation, we cross off any that are in fact still being used.\n        var isInitial = state.pure ? undefined : !state.dependenciesCount, // If we're evaluating when there are no previous dependencies, it must be the first time\n        dependencyDetectionContext = {\n            computedObservable: computedObservable,\n            disposalCandidates: state.dependencyTracking,\n            disposalCount: state.dependenciesCount\n        };\n        dependencyDetection.begin({\n            callbackTarget: dependencyDetectionContext,\n            callback: computedBeginDependencyDetectionCallback,\n            computed: computedObservable,\n            isInitial: isInitial\n        });\n        state.dependencyTracking = {};\n        state.dependenciesCount = 0;\n        var newValue = this.evaluateImmediate_CallReadThenEndDependencyDetection(state, dependencyDetectionContext);\n        if (computedObservable.isDifferent(state.latestValue, newValue)) {\n            if (!state.isSleeping) {\n                computedObservable.notifySubscribers(state.latestValue, 'beforeChange');\n            }\n            state.latestValue = newValue;\n            if (state.isSleeping) {\n                computedObservable.updateVersion();\n            }\n            else if (notifyChange) {\n                computedObservable.notifySubscribers(state.latestValue);\n            }\n        }\n        if (isInitial) {\n            computedObservable.notifySubscribers(state.latestValue, 'awake');\n        }\n    },\n    evaluateImmediate_CallReadThenEndDependencyDetection: function (state, dependencyDetectionContext) {\n        // This function is really part of the evaluateImmediate_CallReadWithDependencyDetection logic.\n        // You'd never call it from anywhere else. Factoring it out means that evaluateImmediate_CallReadWithDependencyDetection\n        // can be independent of try/finally blocks, which contributes to saving about 40% off the CPU\n        // overhead of computed evaluation (on V8 at least).\n        try {\n            var readFunction = state.readFunction;\n            return state.evaluatorFunctionTarget ? readFunction.call(state.evaluatorFunctionTarget) : readFunction();\n        }\n        finally {\n            dependencyDetection.end();\n            // For each subscription no longer being used, remove it from the active subscriptions list and dispose it\n            if (dependencyDetectionContext.disposalCount && !state.isSleeping) {\n                objectForEach(dependencyDetectionContext.disposalCandidates, computedDisposeDependencyCallback);\n            }\n            state.isStale = false;\n        }\n    },\n    peek: function () {\n        // Peek won't re-evaluate, except while the computed is sleeping or to get the initial value when \"deferEvaluation\" is set.\n        var state = this[computedState];\n        if ((state.isStale && !state.dependenciesCount) || (state.isSleeping && this.haveDependenciesChanged())) {\n            this.evaluateImmediate();\n        }\n        return state.latestValue;\n    },\n    limit: function (limitFunction) {\n        // Override the limit function with one that delays evaluation as well\n        subscribable.fn.limit.call(this, limitFunction);\n        this._evalDelayed = function () {\n            this._limitBeforeChange(this[computedState].latestValue);\n            this[computedState].isStale = true; // Mark as dirty\n            // Pass the observable to the \"limit\" code, which will access it when\n            // it's time to do the notification.\n            this._limitChange(this);\n        };\n    },\n    dispose: function () {\n        var state = this[computedState];\n        if (!state.isSleeping && state.dependencyTracking) {\n            objectForEach(state.dependencyTracking, function (id, dependency) {\n                if (dependency.dispose) {\n                    dependency.dispose();\n                }\n            });\n        }\n        if (state.disposeWhenNodeIsRemoved && state.domNodeDisposalCallback) {\n            removeDisposeCallback(state.disposeWhenNodeIsRemoved, state.domNodeDisposalCallback);\n        }\n        state.dependencyTracking = null;\n        state.dependenciesCount = 0;\n        state.isDisposed = true;\n        state.isStale = false;\n        state.isSleeping = false;\n        state.disposeWhenNodeIsRemoved = null;\n        state.readFunction = null;\n        if (options.debug) {\n            this._options = null;\n        }\n    }\n};\nvar pureComputedOverrides = {\n    beforeSubscriptionAdd: function (event) {\n        // If asleep, wake up the computed by subscribing to any dependencies.\n        var computedObservable = this, state = computedObservable[computedState];\n        if (!state.isDisposed && state.isSleeping && event == 'change') {\n            state.isSleeping = false;\n            if (state.isStale || computedObservable.haveDependenciesChanged()) {\n                state.dependencyTracking = null;\n                state.dependenciesCount = 0;\n                state.isStale = true;\n                computedObservable.evaluateImmediate();\n            }\n            else {\n                // First put the dependencies in order\n                var dependeciesOrder = [];\n                objectForEach(state.dependencyTracking, function (id, dependency) {\n                    dependeciesOrder[dependency._order] = id;\n                });\n                // Next, subscribe to each one\n                arrayForEach(dependeciesOrder, function (id, order) {\n                    var dependency = state.dependencyTracking[id], subscription = computedObservable.subscribeToDependency(dependency._target);\n                    subscription._order = order;\n                    subscription._version = dependency._version;\n                    state.dependencyTracking[id] = subscription;\n                });\n            }\n            if (!state.isDisposed) {\n                computedObservable.notifySubscribers(state.latestValue, 'awake');\n            }\n        }\n    },\n    afterSubscriptionRemove: function (event) {\n        var state = this[computedState];\n        if (!state.isDisposed && event == 'change' && !this.hasSubscriptionsForEvent('change')) {\n            objectForEach(state.dependencyTracking, function (id, dependency) {\n                if (dependency.dispose) {\n                    state.dependencyTracking[id] = {\n                        _target: dependency._target,\n                        _order: dependency._order,\n                        _version: dependency._version\n                    };\n                    dependency.dispose();\n                }\n            });\n            state.isSleeping = true;\n            this.notifySubscribers(undefined, 'asleep');\n        }\n    },\n    getVersion: function () {\n        // Because a pure computed is not automatically updated while it is sleeping, we can't\n        // simply return the version number. Instead, we check if any of the dependencies have\n        // changed and conditionally re-evaluate the computed observable.\n        var state = this[computedState];\n        if (state.isSleeping && (state.isStale || this.haveDependenciesChanged())) {\n            this.evaluateImmediate();\n        }\n        return subscribable.fn.getVersion.call(this);\n    }\n};\nvar deferEvaluationOverrides = {\n    beforeSubscriptionAdd: function (event) {\n        // This will force a computed with deferEvaluation to evaluate when the first subscription is registered.\n        if (event == 'change' || event == 'beforeChange') {\n            this.peek();\n        }\n    }\n};\n// Note that for browsers that don't support proto assignment, the\n// inheritance chain is created manually in the ko.computed constructor\nif (canSetPrototype) {\n    setPrototypeOf(computed.fn, subscribable.fn);\n}\n// Set the proto chain values for ko.hasPrototype\nvar protoProp = observable.protoProperty; // == \"__ko_proto__\"\ncomputed[protoProp] = observable;\ncomputed.fn[protoProp] = computed;\nfunction isComputed(instance) {\n    return hasPrototype(instance, computed);\n}\nfunction isPureComputed(instance) {\n    return hasPrototype(instance, computed)\n        && instance[computedState] && instance[computedState].pure;\n}\nfunction pureComputed(evaluatorFunctionOrOptions, evaluatorFunctionTarget) {\n    if (typeof evaluatorFunctionOrOptions === 'function') {\n        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget, { 'pure': true });\n    }\n    else {\n        evaluatorFunctionOrOptions = extend({}, evaluatorFunctionOrOptions); // make a copy of the parameter object\n        evaluatorFunctionOrOptions.pure = true;\n        return computed(evaluatorFunctionOrOptions, evaluatorFunctionTarget);\n    }\n}\n\nfunction throttleExtender(target, timeout) {\n    // Throttling means two things:\n    // (1) For dependent observables, we throttle *evaluations* so that, no matter how fast its dependencies\n    //     notify updates, the target doesn't re-evaluate (and hence doesn't notify) faster than a certain rate\n    target.throttleEvaluation = timeout;\n    // (2) For writable targets (observables, or writable dependent observables), we throttle *writes*\n    //     so the target cannot change value synchronously or faster than a certain rate\n    var writeTimeoutInstance = null;\n    return computed({\n        read: target,\n        write: function (value) {\n            clearTimeout(writeTimeoutInstance);\n            writeTimeoutInstance = setTimeout(function () {\n                target(value);\n            }, timeout);\n        }\n    });\n}\nextenders.throttle = throttleExtender;\n\n//\n// tko.computed - Exports\n//\n// knockout -> tko changes:\n//      Deprecates `dependentObservable` (use `computed`)\n//\n\nexport { computed, isComputed, isPureComputed, pureComputed, throttleExtender };\n//# sourceMappingURL=tko.computed.js.map\n","import { clonePlainObjectDeep, extend, objectForEach, options, stringTrim } from 'tko.utils';\nimport { isObservable, isWriteableObservable, unwrap } from 'tko.observable';\n\nfunction LAMBDA() { }\n/**\n * @ operator - recursively call the identifier if it's a function\n * @param  {operand} a ignored\n * @param  {operand} b The variable to be called (if a function) and unwrapped\n * @return {value}   The result.\n */\nfunction unwrapOrCall(a, b) {\n    while (typeof b === 'function') {\n        b = b();\n    }\n    return b;\n}\nvar operators = {\n    // unary\n    '@': unwrapOrCall,\n    '#': function (a, b) { return function () { return unwrap(b); }; },\n    '=>': LAMBDA,\n    '!': function not(a, b) { return !b; },\n    '!!': function notnot(a, b) { return !!b; },\n    '++': function preinc(a, b) { return ++b; },\n    '--': function preinc(a, b) { return --b; },\n    // mul/div\n    '*': function mul(a, b) { return a * b; },\n    '/': function div(a, b) { return a / b; },\n    '%': function mod(a, b) { return a % b; },\n    // sub/add\n    '+': function add(a, b) { return a + b; },\n    '-': function sub(a, b) { return (a || 0) - (b || 0); },\n    '&-': function neg(a, b) { return -1 * b; },\n    // relational\n    '<': function lt(a, b) { return a < b; },\n    '<=': function le(a, b) { return a <= b; },\n    '>': function gt(a, b) { return a > b; },\n    '>=': function ge(a, b) { return a >= b; },\n    //    TODO: 'in': function (a, b) { return a in b; },\n    //    TODO: 'instanceof': function (a, b) { return a instanceof b; },\n    // equality\n    '==': function equal(a, b) { return a === b; },\n    '!=': function ne(a, b) { return a !== b; },\n    '===': function sequal(a, b) { return a === b; },\n    '!==': function sne(a, b) { return a !== b; },\n    // bitwise\n    '&': function bitAnd(a, b) { return a & b; },\n    '^': function xor(a, b) { return a ^ b; },\n    '|': function bitOr(a, b) { return a | b; },\n    // logic\n    '&&': function logicAnd(a, b) { return a && b; },\n    '||': function logicOr(a, b) { return a || b; },\n    // Access\n    '.': function member(a, b) { return a[b]; },\n    '[': function member(a, b) { return a[b]; },\n    // conditional/ternary\n    // '?': ternary See Node.js\n    // Function-Call\n    'call': function callOp(a, b) { return a.apply(null, b); }\n};\n/* Order of precedence from:\nhttps://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table\n*/\n// Our operator - unwrap/call\noperators['@'].precedence = 21;\noperators['#'].precedence = 21;\n// lambda\noperators['=>'].precedence = 20;\n// Member\noperators['.'].precedence = 19;\noperators['['].precedence = 19;\n// Logical not\noperators['!'].precedence = 16;\noperators['!!'].precedence = 16; // explicit double-negative\n// Prefix inc/dec\noperators['++'].precedence = 16;\noperators['--'].precedence = 16;\noperators['&-'].precedence = 16;\n// mul/div/remainder\noperators['%'].precedence = 14;\noperators['*'].precedence = 14;\noperators['/'].precedence = 14;\n// add/sub\noperators['+'].precedence = 13;\noperators['-'].precedence = 13;\n// bitwise\noperators['|'].precedence = 12;\noperators['^'].precedence = 11;\noperators['&'].precedence = 10;\n// comparison\noperators['<'].precedence = 11;\noperators['<='].precedence = 11;\noperators['>'].precedence = 11;\noperators['>='].precedence = 11;\n// operators['in'].precedence = 8;\n// operators['instanceof'].precedence = 8;\n// equality\noperators['=='].precedence = 10;\noperators['!='].precedence = 10;\noperators['==='].precedence = 10;\noperators['!=='].precedence = 10;\n// logic\noperators['&&'].precedence = 6;\noperators['||'].precedence = 5;\noperators['&&'].earlyOut = function (a) { return !a; };\noperators['||'].earlyOut = function (a) { return a; };\n// Call a function\noperators['call'].precedence = 1;\n\nvar IS_EXPR_OR_IDENT = Symbol('Node - Is Expression Or Identifier');\nvar Node = /** @class */ (function () {\n    function Node(lhs, op, rhs) {\n        this.lhs = lhs;\n        this.op = op;\n        this.rhs = rhs;\n    }\n    Object.defineProperty(Node, \"operators\", {\n        get: function () { return operators; },\n        enumerable: true,\n        configurable: true\n    });\n    Node.prototype.get_leaf_value = function (leaf, context, globals, node) {\n        if (typeof leaf === 'function') {\n            // Expressions on observables are nonsensical, so we unwrap any\n            // function values (e.g. identifiers).\n            return unwrap(leaf());\n        }\n        // primitives\n        if (typeof leaf !== 'object' || leaf === null) {\n            return leaf;\n        }\n        // Identifiers and Expressions\n        if (leaf[Node.isExpressionOrIdentifierSymbol]) {\n            // lhs is passed in as the parent of the leaf. It will be defined in\n            // cases like a.b.c as 'a' for 'b' then as 'b' for 'c'.\n            return unwrap(leaf.get_value(undefined, context, globals, node));\n        }\n        // Plain object/class.\n        return leaf;\n    };\n    /**\n     * Return a function that calculates and returns an expression's value\n     * when called.\n     * @param  {array} ops  The operations to perform\n     * @return {function}   The function that calculates the expression.\n     *\n     * Note that for a lambda, we do not evaluate the RHS expression until\n     * the lambda is called.\n     */\n    Node.prototype.get_value = function (notused, context, globals, node) {\n        var node = this;\n        if (node.op === LAMBDA) {\n            return function () { return node.get_leaf_value(node.rhs, context, globals, node); };\n        }\n        var lhv = node.get_leaf_value(node.lhs, context, globals, node);\n        var earlyOut = node.op.earlyOut;\n        if (earlyOut && earlyOut(lhv)) {\n            return lhv;\n        }\n        var rhv = node.get_leaf_value(node.rhs, context, globals, node);\n        return node.op(lhv, rhv, context, globals);\n    };\n    Object.defineProperty(Node, \"isExpressionOrIdentifierSymbol\", {\n        //\n        // Class variables.\n        //\n        get: function () { return IS_EXPR_OR_IDENT; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(Node.prototype, IS_EXPR_OR_IDENT, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Node.value_of = function (item, context, globals, node) {\n        if (item && item[Node.isExpressionOrIdentifierSymbol]) {\n            return item.get_value(item, context, globals, node);\n        }\n        return item;\n    };\n    /**\n    *  Convert an array of nodes to an executable tree.\n    *  @return {object} An object with a `lhs`, `rhs` and `op` key, corresponding\n    *                      to the left hand side, right hand side, and\n    *                      operation function.\n    */\n    Node.create_root = function (nodes) {\n        var root, leaf, op, value;\n        // Prime the leaf = root node.\n        leaf = root = new Node(nodes.shift(), nodes.shift(), nodes.shift());\n        while (true) {\n            op = nodes.shift();\n            value = nodes.shift();\n            if (!op) {\n                break;\n            }\n            if (op.precedence < root.op.precedence) {\n                // rebase\n                root = new Node(root, op, value);\n                leaf = root;\n            }\n            else {\n                leaf.rhs = new Node(leaf.rhs, op, value);\n                leaf = leaf.rhs;\n            }\n        }\n        // console.log('tree', root)\n        return root;\n    };\n    return Node;\n}());\n/**\n * Because of cyclical dependencies on operators <-> Node <-> value_of,\n * we need to patch this in here.\n */\noperators['?'] = function ternary(a, b, context, globals, node) {\n    return Node.value_of(a ? b.yes : b.no, context, globals, node);\n};\noperators['?'].precedence = 4;\n\nvar Expression = /** @class */ (function () {\n    function Expression(nodes) {\n        this.nodes = nodes;\n        this.root = Node.create_root(nodes);\n    }\n    /**\n     * Return the value of `this` Expression instance.\n     */\n    Expression.prototype.get_value = function (parent, context, globals, node) {\n        if (!this.root) {\n            this.root = Node.create_root(this.nodes);\n        }\n        return this.root.get_value(parent, context, globals, node);\n    };\n    return Expression;\n}());\nExpression.prototype[Node.isExpressionOrIdentifierSymbol] = true;\n\nvar Arguments = /** @class */ (function () {\n    function Arguments(parser, args) {\n        this.parser = parser;\n        this.args = args;\n    }\n    Arguments.prototype.get_value = function (parent, context, globals, node) {\n        var deReffedArgs = [];\n        for (var i = 0, j = this.args.length; i < j; ++i) {\n            deReffedArgs.push(Node.value_of(this.args[i], context, globals, node));\n        }\n        return deReffedArgs;\n    };\n    \n    Object.defineProperty(Arguments.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Arguments;\n}());\n\n/**\n * The following regular expressions were generated by\n *  https://mathiasbynens.be/demo/javascript-identifier-regex\n */\nvar IDStart = /[\\$A-Z_a-z\\xAA\\xB5\\xBA\\xC0-\\xD6\\xD8-\\xF6\\xF8-\\u02C1\\u02C6-\\u02D1\\u02E0-\\u02E4\\u02EC\\u02EE\\u0370-\\u0374\\u0376\\u0377\\u037A-\\u037D\\u037F\\u0386\\u0388-\\u038A\\u038C\\u038E-\\u03A1\\u03A3-\\u03F5\\u03F7-\\u0481\\u048A-\\u052F\\u0531-\\u0556\\u0559\\u0561-\\u0587\\u05D0-\\u05EA\\u05F0-\\u05F2\\u0620-\\u064A\\u066E\\u066F\\u0671-\\u06D3\\u06D5\\u06E5\\u06E6\\u06EE\\u06EF\\u06FA-\\u06FC\\u06FF\\u0710\\u0712-\\u072F\\u074D-\\u07A5\\u07B1\\u07CA-\\u07EA\\u07F4\\u07F5\\u07FA\\u0800-\\u0815\\u081A\\u0824\\u0828\\u0840-\\u0858\\u08A0-\\u08B4\\u0904-\\u0939\\u093D\\u0950\\u0958-\\u0961\\u0971-\\u0980\\u0985-\\u098C\\u098F\\u0990\\u0993-\\u09A8\\u09AA-\\u09B0\\u09B2\\u09B6-\\u09B9\\u09BD\\u09CE\\u09DC\\u09DD\\u09DF-\\u09E1\\u09F0\\u09F1\\u0A05-\\u0A0A\\u0A0F\\u0A10\\u0A13-\\u0A28\\u0A2A-\\u0A30\\u0A32\\u0A33\\u0A35\\u0A36\\u0A38\\u0A39\\u0A59-\\u0A5C\\u0A5E\\u0A72-\\u0A74\\u0A85-\\u0A8D\\u0A8F-\\u0A91\\u0A93-\\u0AA8\\u0AAA-\\u0AB0\\u0AB2\\u0AB3\\u0AB5-\\u0AB9\\u0ABD\\u0AD0\\u0AE0\\u0AE1\\u0AF9\\u0B05-\\u0B0C\\u0B0F\\u0B10\\u0B13-\\u0B28\\u0B2A-\\u0B30\\u0B32\\u0B33\\u0B35-\\u0B39\\u0B3D\\u0B5C\\u0B5D\\u0B5F-\\u0B61\\u0B71\\u0B83\\u0B85-\\u0B8A\\u0B8E-\\u0B90\\u0B92-\\u0B95\\u0B99\\u0B9A\\u0B9C\\u0B9E\\u0B9F\\u0BA3\\u0BA4\\u0BA8-\\u0BAA\\u0BAE-\\u0BB9\\u0BD0\\u0C05-\\u0C0C\\u0C0E-\\u0C10\\u0C12-\\u0C28\\u0C2A-\\u0C39\\u0C3D\\u0C58-\\u0C5A\\u0C60\\u0C61\\u0C85-\\u0C8C\\u0C8E-\\u0C90\\u0C92-\\u0CA8\\u0CAA-\\u0CB3\\u0CB5-\\u0CB9\\u0CBD\\u0CDE\\u0CE0\\u0CE1\\u0CF1\\u0CF2\\u0D05-\\u0D0C\\u0D0E-\\u0D10\\u0D12-\\u0D3A\\u0D3D\\u0D4E\\u0D5F-\\u0D61\\u0D7A-\\u0D7F\\u0D85-\\u0D96\\u0D9A-\\u0DB1\\u0DB3-\\u0DBB\\u0DBD\\u0DC0-\\u0DC6\\u0E01-\\u0E30\\u0E32\\u0E33\\u0E40-\\u0E46\\u0E81\\u0E82\\u0E84\\u0E87\\u0E88\\u0E8A\\u0E8D\\u0E94-\\u0E97\\u0E99-\\u0E9F\\u0EA1-\\u0EA3\\u0EA5\\u0EA7\\u0EAA\\u0EAB\\u0EAD-\\u0EB0\\u0EB2\\u0EB3\\u0EBD\\u0EC0-\\u0EC4\\u0EC6\\u0EDC-\\u0EDF\\u0F00\\u0F40-\\u0F47\\u0F49-\\u0F6C\\u0F88-\\u0F8C\\u1000-\\u102A\\u103F\\u1050-\\u1055\\u105A-\\u105D\\u1061\\u1065\\u1066\\u106E-\\u1070\\u1075-\\u1081\\u108E\\u10A0-\\u10C5\\u10C7\\u10CD\\u10D0-\\u10FA\\u10FC-\\u1248\\u124A-\\u124D\\u1250-\\u1256\\u1258\\u125A-\\u125D\\u1260-\\u1288\\u128A-\\u128D\\u1290-\\u12B0\\u12B2-\\u12B5\\u12B8-\\u12BE\\u12C0\\u12C2-\\u12C5\\u12C8-\\u12D6\\u12D8-\\u1310\\u1312-\\u1315\\u1318-\\u135A\\u1380-\\u138F\\u13A0-\\u13F5\\u13F8-\\u13FD\\u1401-\\u166C\\u166F-\\u167F\\u1681-\\u169A\\u16A0-\\u16EA\\u16EE-\\u16F8\\u1700-\\u170C\\u170E-\\u1711\\u1720-\\u1731\\u1740-\\u1751\\u1760-\\u176C\\u176E-\\u1770\\u1780-\\u17B3\\u17D7\\u17DC\\u1820-\\u1877\\u1880-\\u18A8\\u18AA\\u18B0-\\u18F5\\u1900-\\u191E\\u1950-\\u196D\\u1970-\\u1974\\u1980-\\u19AB\\u19B0-\\u19C9\\u1A00-\\u1A16\\u1A20-\\u1A54\\u1AA7\\u1B05-\\u1B33\\u1B45-\\u1B4B\\u1B83-\\u1BA0\\u1BAE\\u1BAF\\u1BBA-\\u1BE5\\u1C00-\\u1C23\\u1C4D-\\u1C4F\\u1C5A-\\u1C7D\\u1CE9-\\u1CEC\\u1CEE-\\u1CF1\\u1CF5\\u1CF6\\u1D00-\\u1DBF\\u1E00-\\u1F15\\u1F18-\\u1F1D\\u1F20-\\u1F45\\u1F48-\\u1F4D\\u1F50-\\u1F57\\u1F59\\u1F5B\\u1F5D\\u1F5F-\\u1F7D\\u1F80-\\u1FB4\\u1FB6-\\u1FBC\\u1FBE\\u1FC2-\\u1FC4\\u1FC6-\\u1FCC\\u1FD0-\\u1FD3\\u1FD6-\\u1FDB\\u1FE0-\\u1FEC\\u1FF2-\\u1FF4\\u1FF6-\\u1FFC\\u2071\\u207F\\u2090-\\u209C\\u2102\\u2107\\u210A-\\u2113\\u2115\\u2119-\\u211D\\u2124\\u2126\\u2128\\u212A-\\u212D\\u212F-\\u2139\\u213C-\\u213F\\u2145-\\u2149\\u214E\\u2160-\\u2188\\u2C00-\\u2C2E\\u2C30-\\u2C5E\\u2C60-\\u2CE4\\u2CEB-\\u2CEE\\u2CF2\\u2CF3\\u2D00-\\u2D25\\u2D27\\u2D2D\\u2D30-\\u2D67\\u2D6F\\u2D80-\\u2D96\\u2DA0-\\u2DA6\\u2DA8-\\u2DAE\\u2DB0-\\u2DB6\\u2DB8-\\u2DBE\\u2DC0-\\u2DC6\\u2DC8-\\u2DCE\\u2DD0-\\u2DD6\\u2DD8-\\u2DDE\\u2E2F\\u3005-\\u3007\\u3021-\\u3029\\u3031-\\u3035\\u3038-\\u303C\\u3041-\\u3096\\u309D-\\u309F\\u30A1-\\u30FA\\u30FC-\\u30FF\\u3105-\\u312D\\u3131-\\u318E\\u31A0-\\u31BA\\u31F0-\\u31FF\\u3400-\\u4DB5\\u4E00-\\u9FD5\\uA000-\\uA48C\\uA4D0-\\uA4FD\\uA500-\\uA60C\\uA610-\\uA61F\\uA62A\\uA62B\\uA640-\\uA66E\\uA67F-\\uA69D\\uA6A0-\\uA6EF\\uA717-\\uA71F\\uA722-\\uA788\\uA78B-\\uA7AD\\uA7B0-\\uA7B7\\uA7F7-\\uA801\\uA803-\\uA805\\uA807-\\uA80A\\uA80C-\\uA822\\uA840-\\uA873\\uA882-\\uA8B3\\uA8F2-\\uA8F7\\uA8FB\\uA8FD\\uA90A-\\uA925\\uA930-\\uA946\\uA960-\\uA97C\\uA984-\\uA9B2\\uA9CF\\uA9E0-\\uA9E4\\uA9E6-\\uA9EF\\uA9FA-\\uA9FE\\uAA00-\\uAA28\\uAA40-\\uAA42\\uAA44-\\uAA4B\\uAA60-\\uAA76\\uAA7A\\uAA7E-\\uAAAF\\uAAB1\\uAAB5\\uAAB6\\uAAB9-\\uAABD\\uAAC0\\uAAC2\\uAADB-\\uAADD\\uAAE0-\\uAAEA\\uAAF2-\\uAAF4\\uAB01-\\uAB06\\uAB09-\\uAB0E\\uAB11-\\uAB16\\uAB20-\\uAB26\\uAB28-\\uAB2E\\uAB30-\\uAB5A\\uAB5C-\\uAB65\\uAB70-\\uABE2\\uAC00-\\uD7A3\\uD7B0-\\uD7C6\\uD7CB-\\uD7FB\\uF900-\\uFA6D\\uFA70-\\uFAD9\\uFB00-\\uFB06\\uFB13-\\uFB17\\uFB1D\\uFB1F-\\uFB28\\uFB2A-\\uFB36\\uFB38-\\uFB3C\\uFB3E\\uFB40\\uFB41\\uFB43\\uFB44\\uFB46-\\uFBB1\\uFBD3-\\uFD3D\\uFD50-\\uFD8F\\uFD92-\\uFDC7\\uFDF0-\\uFDFB\\uFE70-\\uFE74\\uFE76-\\uFEFC\\uFF21-\\uFF3A\\uFF41-\\uFF5A\\uFF66-\\uFFBE\\uFFC2-\\uFFC7\\uFFCA-\\uFFCF\\uFFD2-\\uFFD7\\uFFDA-\\uFFDC]/;\nvar IDContinue = 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Identifier = /** @class */ (function () {\n    function Identifier(parser, token, dereferences) {\n        this.token = token;\n        this.dereferences = dereferences;\n        this.parser = parser;\n    }\n    /**\n     * Apply all () and [] functions on the identifier to the lhs value e.g.\n     * a()[3] has deref functions that are essentially this:\n     *     [_deref_call, _deref_this where this=3]\n     *\n     * @param  {mixed} value  Should be an object.\n     * @return {mixed}        The dereferenced value.\n     *\n     * [1] We want to bind any function that is a method of an object, but not\n     *     corrupt any values (e.g. computed()s).   e.g. Running x.bind(obj) where\n     *     we're given `data-bind='binding: obj.x'` and x is a computed will\n     *     break the computed's `this` and it will stop working as expected.\n     *\n     *     The test `!last_value.hasOwnProperty(member)`\n     *     distinguishes between functions on the prototype chain (prototypal\n     *     members) and value-members added directly to the object.  This may\n     *     not be the canonical test for this relationship, but it succeeds\n     *     in the known test cases.\n     *\n     *     See: `this` tests of our dereference function.\n     */\n    Identifier.prototype.dereference = function (value, $context, globals, node) {\n        var member;\n        var refs = this.dereferences || [];\n        var $data = $context.$data || {};\n        var lastValue; // becomes `this` in function calls to object properties.\n        var i, n;\n        for (i = 0, n = refs.length; i < n; ++i) {\n            member = Node.value_of(refs[i], $context, globals, node);\n            if (typeof value === 'function' && refs[i] instanceof Arguments) {\n                // fn(args)\n                value = value.apply(lastValue || $data, member);\n                lastValue = value;\n            }\n            else {\n                // obj[x] or obj.x dereference.  Note that obj may be a function.\n                lastValue = value;\n                value = Node.value_of(value[member], $context, globals, node);\n            }\n        }\n        // [1] See note above.\n        if (typeof value === 'function' && n > 0 && lastValue !== value &&\n            !lastValue.hasOwnProperty(member)) {\n            return value.bind(lastValue);\n        }\n        return value;\n    };\n    \n    /**\n     * Return the value as one would get it from the top-level i.e.\n     * $data.token/$context.token/globals.token; this does not return intermediate\n     * values on a chain of members i.e. $data.hello.there -- requesting the\n     * Identifier('there').value will return $data/$context/globals.there.\n     *\n     * This will dereference using () or [arg] member.\n     * @param  {object | Identifier | Expression} parent\n     * @return {mixed}  Return the primitive or an accessor.\n     */\n    Identifier.prototype.get_value = function (parent, context, globals, node) {\n        var intermediate = parent && !(parent instanceof Identifier)\n            ? Node.value_of(parent, context, globals, node)[this.token]\n            : context.lookup(this.token, globals, node);\n        return this.dereference(intermediate, context, globals, node);\n    };\n    Identifier.prototype.assign = function (object, property, value) {\n        if (isWriteableObservable(object[property])) {\n            object[property](value);\n        }\n        else if (!isObservable(object[property])) {\n            object[property] = value;\n        }\n    };\n    \n    /**\n     * Set the value of the Identifier.\n     *\n     * @param {Mixed} new_value The value that Identifier is to be set to.\n     */\n    Identifier.prototype.set_value = function (new_value, $context, globals) {\n        var $data = $context.$data || {};\n        var refs = this.dereferences || [];\n        var leaf = this.token;\n        var i, n, root;\n        if (Object.hasOwnProperty.call($data, leaf)) {\n            root = $data;\n        }\n        else if (Object.hasOwnProperty.call($context, leaf)) {\n            root = $context;\n        }\n        else if (Object.hasOwnProperty.call(globals, leaf)) {\n            root = globals;\n        }\n        else {\n            throw new Error('Identifier::set_value -- ' +\n                \"The property '\" + leaf + \"' does not exist \" +\n                'on the $data, $context, or globals.');\n        }\n        // Degenerate case. {$data|$context|global}[leaf] = something;\n        n = refs.length;\n        if (n === 0) {\n            this.assign(root, leaf, new_value);\n            return;\n        }\n        // First dereference is {$data|$context|global}[token].\n        root = root[leaf];\n        // We cannot use this.dereference because that gives the leaf; to evoke\n        // the ES5 setter we have to call `obj[leaf] = new_value`\n        for (i = 0; i < n - 1; ++i) {\n            leaf = refs[i];\n            if (leaf instanceof Arguments) {\n                root = root();\n            }\n            else {\n                root = root[Node.value_of(leaf)];\n            }\n        }\n        // We indicate that a dereference is a function when it is `true`.\n        if (refs[i] === true) {\n            throw new Error('Cannot assign a value to a function.');\n        }\n        // Call the setter for the leaf.\n        if (refs[i]) {\n            this.assign(root, Node.value_of(refs[i]), new_value);\n        }\n    };\n    \n    /**\n     * Determine if a character is a valid item in an identifier.\n     * Note that we do not check whether the first item is a number, nor do we\n     * support unicode identifiers here.\n     *\n     * From:  http://stackoverflow.com/a/9337047\n     * @param  {String}  ch  The character\n     * @return {Boolean}     True if this is a valid identifier\n     */\n    // function is_identifier_char(ch) {\n    //   return (ch >= 'A' && ch <= 'Z') ||\n    //          (ch >= 'a' && ch <= 'z') ||\n    //          (ch >= '0' && ch <= 9) ||\n    //           ch === '_' || ch === '$';\n    // }\n    Identifier.is_valid_start_char = function (ch) {\n        return IDStart.test(ch);\n    };\n    Identifier.is_valid_continue_char = function (ch) {\n        return IDContinue.test(ch);\n    };\n    Object.defineProperty(Identifier.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Identifier;\n}());\n\nvar Ternary = /** @class */ (function () {\n    function Ternary(yes, no) {\n        Object.assign(this, { yes: yes, no: no });\n    }\n    Ternary.prototype.get_value = function () { return this; };\n    Object.defineProperty(Ternary.prototype, Node.isExpressionOrIdentifierSymbol, {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return Ternary;\n}());\n\n/**\n * Originally based on (public domain):\n * https://github.com/douglascrockford/JSON-js/blob/master/json_parse.js\n */\nvar escapee = {\n    \"'\": \"'\",\n    '\"': '\"',\n    '`': '`',\n    '\\\\': '\\\\',\n    '/': '/',\n    '$': '$',\n    b: '\\b',\n    f: '\\f',\n    n: '\\n',\n    r: '\\r',\n    t: '\\t'\n};\n/**\n * Construct a new Parser instance with new Parser(node, context)\n * @param {Node} node    The DOM element from which we parsed the\n *                         content.\n * @param {object} context The Knockout context.\n * @param {object} globals An object containing any desired globals.\n */\nvar Parser = /** @class */ (function () {\n    function Parser() {\n    }\n    Parser.prototype.white = function () {\n        var ch = this.ch;\n        while (ch && ch <= ' ') {\n            ch = this.next();\n        }\n        return this.comment(ch);\n    };\n    /**\n     * Slurp any C or C++ style comments\n     */\n    Parser.prototype.comment = function (ch) {\n        if (ch !== '/') {\n            return ch;\n        }\n        var p = this.at;\n        var second = this.lookahead();\n        if (second === '/') {\n            while (ch) {\n                ch = this.next();\n                if (ch === '\\n' || ch === '\\r') {\n                    break;\n                }\n            }\n            ch = this.next();\n        }\n        else if (second === '*') {\n            while (ch) {\n                ch = this.next();\n                if (ch === '*' && this.lookahead() === '/') {\n                    this.next();\n                    break;\n                }\n            }\n            if (!ch) {\n                this.error('Unclosed comment, starting at character ' + p);\n            }\n            this.next();\n            return this.white();\n        }\n        return ch;\n    };\n    \n    Parser.prototype.next = function (c) {\n        if (c && c !== this.ch) {\n            this.error(\"Expected '\" + c + \"' but got '\" + this.ch + \"'\");\n        }\n        this.ch = this.text.charAt(this.at);\n        this.at += 1;\n        return this.ch;\n    };\n    Parser.prototype.lookahead = function () {\n        return this.text[this.at];\n    };\n    Parser.prototype.error = function (m) {\n        if (m instanceof Error) {\n            throw m;\n        }\n        var _a = m.name ? [m.name, m.message] : [m, ''], name = _a[0], msg = _a[1];\n        var message = \"\\n\" + name + \" \" + msg + \" of\\n    \" + this.text + \"\\n\" + Array(this.at).join(' ') + '_/ 🔥 \\\\_\\n';\n        throw new Error(message);\n    };\n    Parser.prototype.name = function () {\n        // A name of a binding\n        var name = '';\n        var enclosedBy;\n        this.white();\n        var ch = this.ch;\n        if (ch === \"'\" || ch === '\"') {\n            enclosedBy = ch;\n            ch = this.next();\n        }\n        while (ch) {\n            if (enclosedBy && ch === enclosedBy) {\n                this.white();\n                ch = this.next();\n                if (ch !== ':' && ch !== ',') {\n                    this.error('Object name: ' + name + ' missing closing ' + enclosedBy);\n                }\n                return name;\n            }\n            else if (ch === ':' || ch <= ' ' || ch === ',' || ch === '|') {\n                return name;\n            }\n            name += ch;\n            ch = this.next();\n        }\n        return name;\n    };\n    Parser.prototype.number = function () {\n        var number;\n        var string = '';\n        var ch = this.ch;\n        if (ch === '-') {\n            string = '-';\n            ch = this.next('-');\n        }\n        while (ch >= '0' && ch <= '9') {\n            string += ch;\n            ch = this.next();\n        }\n        if (ch === '.') {\n            string += '.';\n            ch = this.next();\n            while (ch && ch >= '0' && ch <= '9') {\n                string += ch;\n                ch = this.next();\n            }\n        }\n        if (ch === 'e' || ch === 'E') {\n            string += ch;\n            ch = this.next();\n            if (ch === '-' || ch === '+') {\n                string += ch;\n                ch = this.next();\n            }\n            while (ch >= '0' && ch <= '9') {\n                string += ch;\n                ch = this.next();\n            }\n        }\n        number = +string;\n        if (!isFinite(number)) {\n            options.onError(new Error('Bad number: ' + number + ' in ' + string));\n        }\n        else {\n            return number;\n        }\n    };\n    /**\n     * Add a property to 'object' that equals the given value.\n     * @param  {Object} object The object to add the value to.\n     * @param  {String} key    object[key] is set to the given value.\n     * @param  {mixed}  value  The value, may be a primitive or a function. If a\n     *                         function it is unwrapped as a property.\n     */\n    Parser.prototype.objectAddValue = function (object, key, value) {\n        var _this = this;\n        if (value && value[Node.isExpressionOrIdentifierSymbol]) {\n            Object.defineProperty(object, key, {\n                get: function () { return Node.value_of.apply(Node, [value].concat(_this.currentContextGlobals)); },\n                enumerable: true\n            });\n        }\n        else if (Array.isArray(value)) {\n            Object.defineProperty(object, key, {\n                get: function () { return value.map(function (v) { return Node.value_of.apply(Node, [v].concat(_this.currentContextGlobals)); }); },\n                enumerable: true\n            });\n        }\n        else {\n            // primitives\n            object[key] = value;\n        }\n    };\n    Parser.prototype.object = function () {\n        var key;\n        var object = {};\n        var ch = this.ch;\n        if (ch === '{') {\n            this.next('{');\n            ch = this.white();\n            if (ch === '}') {\n                ch = this.next('}');\n                return object;\n            }\n            while (ch) {\n                if (ch === '\"' || ch === \"'\" || ch === '`') {\n                    key = this.string();\n                }\n                else {\n                    key = this.name();\n                }\n                this.white();\n                ch = this.next(':');\n                if (Object.hasOwnProperty.call(object, key)) {\n                    this.error('Duplicate key \"' + key + '\"');\n                }\n                this.objectAddValue(object, key, this.expression());\n                ch = this.white();\n                if (ch === '}') {\n                    ch = this.next('}');\n                    return object;\n                }\n                this.next(',');\n                ch = this.white();\n            }\n        }\n        this.error('Bad object');\n    };\n    /**\n     * Read up to delim and return the string\n     * @param  {string} delim The delimiter, either ' or \"\n     * @return {string}       The string read.\n     */\n    Parser.prototype.readString = function (delim) {\n        var string = '';\n        var nodes = [''];\n        var plusOp = operators['+'];\n        var hex;\n        var i;\n        var uffff;\n        var interpolate = delim === '`';\n        var ch = this.next();\n        while (ch) {\n            if (ch === delim) {\n                ch = this.next();\n                if (interpolate) {\n                    nodes.push(plusOp);\n                }\n                nodes.push(string);\n                return nodes;\n            }\n            if (ch === '\\\\') {\n                ch = this.next();\n                if (ch === 'u') {\n                    uffff = 0;\n                    for (i = 0; i < 4; i += 1) {\n                        hex = parseInt(ch = this.next(), 16);\n                        if (!isFinite(hex)) {\n                            break;\n                        }\n                        uffff = uffff * 16 + hex;\n                    }\n                    string += String.fromCharCode(uffff);\n                }\n                else if (typeof escapee[ch] === 'string') {\n                    string += escapee[ch];\n                }\n                else {\n                    break;\n                }\n            }\n            else if (interpolate && ch === '$') {\n                ch = this.next();\n                if (ch === '{') {\n                    this.next('{');\n                    nodes.push(plusOp);\n                    nodes.push(string);\n                    nodes.push(plusOp);\n                    nodes.push(this.expression());\n                    string = '';\n                    // this.next('}');\n                }\n                else {\n                    string += '$' + ch;\n                }\n            }\n            else {\n                string += ch;\n            }\n            ch = this.next();\n        }\n        this.error('Bad string');\n    };\n    Parser.prototype.string = function () {\n        var ch = this.ch;\n        if (ch === '\"') {\n            return this.readString('\"').join('');\n        }\n        else if (ch === \"'\") {\n            return this.readString(\"'\").join('');\n        }\n        else if (ch === '`') {\n            return Node.create_root(this.readString('`'));\n        }\n        this.error('Bad string');\n    };\n    Parser.prototype.array = function () {\n        var array = [];\n        var ch = this.ch;\n        if (ch === '[') {\n            ch = this.next('[');\n            this.white();\n            if (ch === ']') {\n                ch = this.next(']');\n                return array;\n            }\n            while (ch) {\n                array.push(this.expression());\n                ch = this.white();\n                if (ch === ']') {\n                    ch = this.next(']');\n                    return array;\n                }\n                this.next(',');\n                ch = this.white();\n            }\n        }\n        this.error('Bad array');\n    };\n    Parser.prototype.value = function () {\n        var ch;\n        this.white();\n        ch = this.ch;\n        switch (ch) {\n            case '{': return this.object();\n            case '[': return this.array();\n            case '\"':\n            case \"'\":\n            case '`': return this.string();\n            case '-': return this.number();\n            default:\n                return ch >= '0' && ch <= '9' ? this.number() : this.identifier();\n        }\n    };\n    /**\n     * Get the function for the given operator.\n     * A `.precedence` value is added to the function, with increasing\n     * precedence having a higher number.\n     * @return {function} The function that performs the infix operation\n     */\n    Parser.prototype.operator = function (opts) {\n        var op = '';\n        var opFn;\n        var ch = this.white();\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        while (ch) {\n            if (isIdentifierChar(ch) || ch <= ' ' || ch === '' ||\n                ch === '\"' || ch === \"'\" || ch === '{' || ch === '(' ||\n                ch === '`' || ch === ')' || (ch <= '9' && ch >= '0')) {\n                break;\n            }\n            if (!opts.not_an_array && ch === '[') {\n                break;\n            }\n            op += ch;\n            ch = this.next();\n            // An infix followed by the prefix e.g. a + @b\n            // TODO: other prefix unary operators\n            if (ch === '@') {\n                break;\n            }\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        if (op !== '') {\n            if (opts.prefix && op === '-') {\n                op = '&-';\n            }\n            opFn = operators[op];\n            if (!opFn) {\n                this.error(\"Bad operator: '\" + op + \"'.\");\n            }\n        }\n        return opFn;\n    };\n    /**\n     * Filters\n     * Returns what the Node interprets as an \"operator\".\n     * e.g.\n     *   <span data-bind=\"text: name | fit:20 | uppercase\"></span>\n     */\n    Parser.prototype.filter = function () {\n        var ch = this.next();\n        var args = [];\n        var nextFilter = function (v) { return v; };\n        var name = this.name();\n        if (!options.filters[name]) {\n            options.onError('Cannot find filter by the name of: ' + name);\n        }\n        ch = this.white();\n        while (ch) {\n            if (ch === ':') {\n                ch = this.next();\n                args.push(this.expression('|'));\n            }\n            if (ch === '|') {\n                nextFilter = this.filter();\n                break;\n            }\n            if (ch === ',') {\n                break;\n            }\n            ch = this.white();\n        }\n        var filter = function filter(value, ignored, context, globals, node) {\n            var argValues = [value];\n            for (var i = 0, j = args.length; i < j; ++i) {\n                argValues.push(Node.value_of(args[i], context, globals, node));\n            }\n            return nextFilter(options.filters[name].apply(null, argValues));\n        };\n        // Lowest precedence.\n        filter.precedence = 1;\n        return filter;\n    };\n    /**\n     * Parse an expression – builds an operator tree, in something like\n     * Shunting-Yard.\n     *   See: http://en.wikipedia.org/wiki/Shunting-yard_algorithm\n     *\n     * @return {function}   A function that computes the value of the expression\n     *                      when called or a primitive.\n     */\n    Parser.prototype.expression = function (filterable) {\n        var op;\n        var nodes = [];\n        var ch = this.white();\n        while (ch) {\n            // unary prefix operators\n            op = this.operator({ prefix: true });\n            if (op) {\n                nodes.push(undefined); // LHS Tree node.\n                nodes.push(op);\n                ch = this.white();\n            }\n            if (ch === '(') {\n                this.next();\n                nodes.push(this.expression());\n                this.next(')');\n            }\n            else {\n                nodes.push(this.value());\n            }\n            ch = this.white();\n            if (ch === ':' || ch === '}' || ch === ',' || ch === ']' ||\n                ch === ')' || ch === '' || ch === '`' || (ch === '|' && filterable === '|')) {\n                break;\n            }\n            // filters\n            if (ch === '|' && this.lookahead() !== '|' && filterable) {\n                nodes.push(this.filter());\n                nodes.push(undefined);\n                break;\n            }\n            // infix or postfix operators\n            op = this.operator({ not_an_array: true });\n            if (op === operators['?']) {\n                this.ternary(nodes);\n                break;\n            }\n            else if (op === operators['.']) {\n                nodes.push(op);\n                nodes.push(this.member());\n                op = null;\n            }\n            else if (op === operators['[']) {\n                nodes.push(op);\n                nodes.push(this.expression());\n                ch = this.next(']');\n                op = null;\n            }\n            else if (op) {\n                nodes.push(op);\n            }\n            ch = this.white();\n            if (ch === ']' || (!op && ch === '(')) {\n                break;\n            }\n        }\n        if (nodes.length === 0) {\n            return undefined;\n        }\n        var dereferences = this.dereferences();\n        if (nodes.length === 1 && !dereferences.length) {\n            return nodes[0];\n        }\n        for (var i = 0, j = dereferences.length; i < j; ++i) {\n            var deref = dereferences[i];\n            if (deref.constructor === Arguments) {\n                nodes.push(operators.call);\n            }\n            else {\n                nodes.push(operators['.']);\n            }\n            nodes.push(deref);\n        }\n        return new Expression(nodes);\n    };\n    Parser.prototype.ternary = function (nodes) {\n        var ternary = new Ternary();\n        ternary.yes = this.expression();\n        this.next(':');\n        ternary.no = this.expression();\n        nodes.push(operators['?']);\n        nodes.push(ternary);\n    };\n    /**\n     * Parse the arguments to a function, returning an Array.\n     *\n     */\n    Parser.prototype.funcArguments = function () {\n        var args = [];\n        var ch = this.next('(');\n        while (ch) {\n            ch = this.white();\n            if (ch === ')') {\n                this.next(')');\n                return new Arguments(this, args);\n            }\n            else {\n                args.push(this.expression());\n                ch = this.white();\n            }\n            if (ch !== ')') {\n                this.next(',');\n            }\n        }\n        this.error('Bad arguments to function');\n    };\n    /**\n     * The literal string reference `abc` in an `x.abc` expression.\n     */\n    Parser.prototype.member = function () {\n        var member = '';\n        var ch = this.white();\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        while (ch) {\n            if (!isIdentifierChar(ch)) {\n                break;\n            }\n            member += ch;\n            ch = this.next();\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        return member;\n    };\n    /**\n     * A dereference applies to an identifer, being either a function\n     * call \"()\" or a membership lookup with square brackets \"[member]\".\n     * @return {fn or undefined}  Dereference function to be applied to the\n     *                            Identifier\n     */\n    Parser.prototype.dereference = function () {\n        var member;\n        var ch = this.white();\n        while (ch) {\n            if (ch === '(') {\n                // a(...) function call\n                return this.funcArguments();\n            }\n            else if (ch === '[') {\n                // a[x] membership\n                this.next('[');\n                member = this.expression();\n                this.white();\n                this.next(']');\n                return member;\n            }\n            else if (ch === '.') {\n                // a.x membership\n                this.next('.');\n                return this.member();\n            }\n            else {\n                break;\n            }\n        }\n    };\n    Parser.prototype.dereferences = function () {\n        var ch = this.white();\n        var dereferences = [];\n        var deref;\n        while (ch) {\n            deref = this.dereference();\n            if (deref !== undefined) {\n                dereferences.push(deref);\n            }\n            else {\n                break;\n            }\n        }\n        return dereferences;\n    };\n    Parser.prototype.identifier = function () {\n        var token = '';\n        var isIdentifierChar = Identifier.is_valid_start_char;\n        var ch = this.white();\n        while (ch) {\n            if (!isIdentifierChar(ch)) {\n                break;\n            }\n            token += ch;\n            ch = this.next();\n            isIdentifierChar = Identifier.is_valid_continue_char;\n        }\n        switch (token) {\n            case 'true': return true;\n            case 'false': return false;\n            case 'null': return null;\n            case 'undefined': return void 0;\n            case 'function':\n                throw new Error('Knockout: Anonymous functions are no longer supported, but `=>` lambas are.');\n        }\n        return new Identifier(this, token, this.dereferences());\n    };\n    Parser.prototype.readBindings = function () {\n        var key;\n        var bindings = {};\n        var sep;\n        var expr;\n        var ch = this.ch;\n        while (ch) {\n            key = this.name();\n            sep = this.white();\n            if (!sep || sep === ',') {\n                if (sep) {\n                    ch = this.next(',');\n                }\n                else {\n                    ch = '';\n                }\n                // A \"bare\" binding e.g. \"text\"; substitute value of 'null'\n                // so it becomes \"text: null\".\n                bindings[key] = null;\n            }\n            else {\n                if (key.indexOf('.') !== -1) {\n                    // Namespaced – i.e.\n                    //    `attr.css: x` becomes `attr: { css: x }`\n                    //     ^^^ - key\n                    key = key.split('.');\n                    bindings[key[0]] = bindings[key[0]] || {};\n                    if (key.length !== 2) {\n                        options.onError('Binding ' + key + ' should have two parts (a.b).');\n                    }\n                    else if (bindings[key[0]].constructor !== Object) {\n                        options.onError('Binding ' + key[0] + '.' + key[1] + ' paired with a non-object.');\n                    }\n                    ch = this.next(':');\n                    this.objectAddValue(bindings[key[0]], key[1], this.expression(true));\n                }\n                else {\n                    ch = this.next(':');\n                    if (bindings[key] && typeof bindings[key] === 'object' && bindings[key].constructor === Object) {\n                        // Extend a namespaced bindings e.g. we've previously seen\n                        // on.x, now we're seeing on: { 'abc' }.\n                        expr = this.expression(true);\n                        if (typeof expr !== 'object' || expr.constructor !== Object) {\n                            options.onError('Expected plain object for ' + key + ' value.');\n                        }\n                        else {\n                            extend(bindings[key], expr);\n                        }\n                    }\n                    else {\n                        bindings[key] = this.expression(true);\n                    }\n                }\n                this.white();\n                if (this.ch) {\n                    ch = this.next(',');\n                }\n                else {\n                    ch = '';\n                }\n            }\n        }\n        return bindings;\n    };\n    Parser.prototype.valueAsAccessor = function (value, context, globals, node) {\n        if (!value) {\n            return function () { return value; };\n        }\n        if (typeof value === 'function') {\n            return value;\n        }\n        if (value[Node.isExpressionOrIdentifierSymbol]) {\n            return function () { return Node.value_of(value, context, globals, node); };\n        }\n        if (Array.isArray(value)) {\n            return function () { return value.map(function (v) { return Node.value_of(v, context, globals, node); }); };\n        }\n        if (typeof (value) !== 'function') {\n            return function () { return clonePlainObjectDeep(value); };\n        }\n        throw new Error('Value has cannot be converted to accessor: ' + value);\n    };\n    /**\n    * Convert result[name] from a value to a function (i.e. `valueAccessor()`)\n    * @param  {object} result [Map of top-level names to values]\n    * @return {object}        [Map of top-level names to functions]\n    *\n    * Accessors may be one of (below) constAccessor, identifierAccessor,\n    * expressionAccessor, or nodeAccessor.\n    */\n    Parser.prototype.convertToAccessors = function (result, context, globals, node) {\n        var _this = this;\n        objectForEach(result, function (name, value) {\n            if (value instanceof Identifier) {\n                // Return a function that, with no arguments returns\n                // the value of the identifier, otherwise sets the\n                // value of the identifier to the first given argument.\n                Object.defineProperty(result, name, {\n                    value: function (optionalValue, options$$1) {\n                        var currentValue = value.get_value(undefined, context, globals, node);\n                        if (arguments.length === 0) {\n                            return currentValue;\n                        }\n                        var unchanged = optionalValue === currentValue;\n                        if (options$$1 && options$$1.onlyIfChanged && unchanged) {\n                            return;\n                        }\n                        return value.set_value(optionalValue, context, globals);\n                    }\n                });\n            }\n            else {\n                result[name] = _this.valueAsAccessor(value, context, globals, node);\n            }\n        });\n        return result;\n    };\n    Parser.prototype.runParse = function (source, fn) {\n        this.text = (source || '').trim();\n        this.at = 0;\n        this.ch = ' ';\n        try {\n            var result = fn();\n            this.white();\n            if (this.ch) {\n                this.error('Syntax Error');\n            }\n            return result;\n        }\n        catch (e) {\n            options.onError(e);\n        }\n    };\n    /**\n     * Get the bindings as name: accessor()\n     * @param  {string} source The binding string to parse.\n     * @return {object}        Map of name to accessor function.\n     */\n    Parser.prototype.parse = function (source, context, globals, node) {\n        var _this = this;\n        if (context === void 0) { context = {}; }\n        if (globals === void 0) { globals = {}; }\n        if (!source) {\n            return function () { return null; };\n        }\n        this.currentContextGlobals = [context, globals, node];\n        var parseFn = function () { return _this.readBindings(); };\n        var bindingAccessors = this.runParse(source, parseFn);\n        return this.convertToAccessors(bindingAccessors, context, globals, node);\n    };\n    /**\n     * Return a function that evaluates and returns the result of the expression.\n     */\n    Parser.prototype.parseExpression = function (source, context, globals, node) {\n        var _this = this;\n        if (context === void 0) { context = {}; }\n        if (globals === void 0) { globals = {}; }\n        if (!source) {\n            return function () { return ''; };\n        }\n        this.currentContextGlobals = [context, globals, node];\n        var parseFn = function () { return _this.expression(true); };\n        var bindingAccessors = this.runParse(source, parseFn);\n        return this.valueAsAccessor(bindingAccessors, context, globals, node);\n    };\n    return Parser;\n}());\n\n/* eslint no-cond-assign: 0 */\n// The following regular expressions will be used to split an object-literal string into tokens\n// These two match strings, either with double quotes or single quotes\nvar stringDouble = '\"(?:[^\"\\\\\\\\]|\\\\\\\\.)*\"';\nvar stringSingle = \"'(?:[^'\\\\\\\\]|\\\\\\\\.)*'\";\nvar stringRegexp = '/(?:[^/\\\\\\\\]|\\\\\\\\.)*/\\w*';\nvar specials = ',\"\\'{}()/:[\\\\]';\nvar everyThingElse = '[^\\\\s:,/][^' + specials + ']*[^\\\\s' + specials + ']';\nvar oneNotSpace = '[^\\\\s]';\nvar bindingToken = RegExp(stringDouble + '|' + stringSingle + '|' + stringRegexp + '|' + everyThingElse + '|' + oneNotSpace, 'g');\nvar divisionLookBehind = /[\\])\"'A-Za-z0-9_$]+$/;\nvar keywordRegexLookBehind = {\n    'in': 1,\n    'return': 1,\n    'typeof': 1\n};\n/**\n * Break a binding string (data-bind='x: val, y: ..') into a stable array\n * of {key: value}.\n */\nfunction parseObjectLiteral(objectLiteralString) {\n    // Trim leading and trailing spaces from the string\n    var str = stringTrim(objectLiteralString);\n    // Trim braces '{' surrounding the whole object literal\n    if (str.charCodeAt(0) === 123)\n        str = str.slice(1, -1);\n    // Split into tokens\n    var result = [], toks = str.match(bindingToken), key, values = [], depth = 0;\n    if (!toks) {\n        return [];\n    }\n    // Append a comma so that we don't need a separate code block to deal with the last item\n    toks.push(',');\n    for (var i = 0, tok; tok = toks[i]; ++i) {\n        var c = tok.charCodeAt(0);\n        // A comma signals the end of a key/value pair if depth is zero\n        if (c === 44) {\n            if (depth <= 0) {\n                result.push((key && values.length) ? {\n                    key: key,\n                    value: values.join('')\n                } : {\n                    'unknown': key || values.join('')\n                });\n                key = depth = 0;\n                values = [];\n                continue;\n            }\n            // Simply skip the colon that separates the name and value\n        }\n        else if (c === 58) {\n            if (!depth && !key && values.length === 1) {\n                key = values.pop();\n                continue;\n            }\n            // A set of slashes is initially matched as a regular expression, but could be division\n        }\n        else if (c === 47 && i && tok.length > 1) {\n            // Look at the end of the previous token to determine if the slash is actually division\n            var match = toks[i - 1].match(divisionLookBehind);\n            if (match && !keywordRegexLookBehind[match[0]]) {\n                // The slash is actually a division punctuator; re-parse the remainder of the string (not including the slash)\n                str = str.substr(str.indexOf(tok) + 1);\n                toks = str.match(bindingToken);\n                toks.push(',');\n                i = -1;\n                // Continue with just the slash\n                tok = '/';\n            }\n            // Increment depth for parentheses, braces, and brackets so that interior commas are ignored\n        }\n        else if (c === 40 || c === 123 || c === 91) {\n            ++depth;\n        }\n        else if (c === 41 || c === 125 || c === 93) {\n            --depth;\n            // The key will be the first token; if it's a string, trim the quotes\n        }\n        else if (!key && !values.length && (c === 34 || c === 39)) {\n            tok = tok.slice(1, -1);\n        }\n        values.push(tok);\n    }\n    return result;\n}\n\nexport { Parser, Identifier, Arguments, Node, parseObjectLiteral };\n//# sourceMappingURL=tko.utils.parser.js.map\n","import { Parser, parseObjectLiteral } from 'tko.utils.parser';\nimport { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\n\r\n\r\nfunction __values(o) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n    if (m) return m.call(o);\r\n    return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n}\n\n/**\n * BindingStringProvider is an abstract base class parses a binding string.\n *\n * Children must implement `nodeHasBindings` and `getBindingString`.\n */\nvar BindingStringProvider = /** @class */ (function (_super) {\n    __extends(BindingStringProvider, _super);\n    function BindingStringProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    /** Call bindingHandler.preprocess on each respective binding string.\n     *\n     * The `preprocess` property of bindingHandler must be a static\n     * function (i.e. on the object or constructor).\n     */\n    BindingStringProvider.prototype.processBinding = function (key, value) {\n        var _a, handlerName, property, handler, bindingsAddedByHandler_1, chainFn, _i, bindingsAddedByHandler_2, _b, key_1, value_1;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _a = key.split('.'), handlerName = _a[0], property = _a[1];\n                    handler = this.bindingHandlers.get(handlerName);\n                    if (!(handler && handler.preprocess)) return [3 /*break*/, 5];\n                    bindingsAddedByHandler_1 = [];\n                    chainFn = function () {\n                        var args = [];\n                        for (var _i = 0; _i < arguments.length; _i++) {\n                            args[_i] = arguments[_i];\n                        }\n                        return bindingsAddedByHandler_1.push(args);\n                    };\n                    value = handler.preprocess(value, key, chainFn);\n                    _i = 0, bindingsAddedByHandler_2 = bindingsAddedByHandler_1;\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < bindingsAddedByHandler_2.length)) return [3 /*break*/, 4];\n                    _b = bindingsAddedByHandler_2[_i], key_1 = _b[0], value_1 = _b[1];\n                    return [5 /*yield**/, __values(this.processBinding(key_1, value_1))];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [3 /*break*/, 6];\n                case 5:\n                    if (property) {\n                        value = \"{\" + property + \":\" + value + \"}\";\n                    }\n                    _c.label = 6;\n                case 6: return [4 /*yield*/, handlerName + \":\" + value];\n                case 7:\n                    _c.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    BindingStringProvider.prototype.generateBindingString = function (bindingString) {\n        var _i, _a, _b, key, unknown, value;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _i = 0, _a = parseObjectLiteral(bindingString);\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    _b = _a[_i], key = _b.key, unknown = _b.unknown, value = _b.value;\n                    return [5 /*yield**/, __values(this.processBinding(key || unknown, value))];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    BindingStringProvider.prototype.preProcessBindings = function (bindingString) {\n        return Array.from(this.generateBindingString(bindingString)).join(',');\n    };\n    BindingStringProvider.prototype.getBindingAccessors = function (node, context) {\n        var bindingString = node && this.getBindingString(node);\n        if (!bindingString) {\n            return;\n        }\n        var processed = this.preProcessBindings(bindingString);\n        return new Parser().parse(processed, context, this.globals, node);\n    };\n    BindingStringProvider.prototype.getBindingString = function () { throw new Error('Overload getBindingString.'); };\n    return BindingStringProvider;\n}(Provider));\n\nexport { BindingStringProvider };\n//# sourceMappingURL=tko.provider.bindingString.js.map\n","import { virtualElements } from 'tko.utils';\nimport { BindingStringProvider } from 'tko.provider.bindingString';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar VirtualProvider = /** @class */ (function (_super) {\n    __extends(VirtualProvider, _super);\n    function VirtualProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(VirtualProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [8]; } // document.COMMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    VirtualProvider.prototype.getBindingString = function (node) {\n        if (node.nodeType === document.COMMENT_NODE) {\n            return virtualElements.virtualNodeBindingValue(node);\n        }\n    };\n    VirtualProvider.prototype.nodeHasBindings = function (node) {\n        if (node.nodeType === document.COMMENT_NODE) {\n            return virtualElements.isStartComment(node);\n        }\n    };\n    return VirtualProvider;\n}(BindingStringProvider));\n\nexport { VirtualProvider };\n//# sourceMappingURL=tko.provider.virtual.js.map\n","import { BindingStringProvider } from 'tko.provider.bindingString';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar DataBindProvider = /** @class */ (function (_super) {\n    __extends(DataBindProvider, _super);\n    function DataBindProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(DataBindProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(DataBindProvider.prototype, \"BIND_ATTRIBUTE\", {\n        get: function () {\n            return 'data-bind';\n        },\n        enumerable: true,\n        configurable: true\n    });\n    DataBindProvider.prototype.getBindingString = function (node) {\n        if (node.nodeType === document.ELEMENT_NODE) {\n            return node.getAttribute(this.BIND_ATTRIBUTE);\n        }\n    };\n    DataBindProvider.prototype.nodeHasBindings = function (node) {\n        if (node.nodeType === document.ELEMENT_NODE) {\n            return node.hasAttribute(this.BIND_ATTRIBUTE);\n        }\n    };\n    return DataBindProvider;\n}(BindingStringProvider));\n\nexport { DataBindProvider };\n//# sourceMappingURL=tko.provider.databind.js.map\n","import { dependencyDetection, subscribable } from 'tko.observable';\nimport { cloneNodes, getObjectOwnProperty, isDocumentFragment, isDomElement, makeArray, parseHtmlFragment, tagNameLower, tasks } from 'tko.utils';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar loadingSubscribablesCache = {};\nvar loadedDefinitionsCache = {}; // Tracks component loads that have already completed\nfunction loadComponentAndNotify(componentName, callback) {\n    var _subscribable = getObjectOwnProperty(loadingSubscribablesCache, componentName), completedAsync;\n    if (!_subscribable) {\n        // It's not started loading yet. Start loading, and when it's done, move it to loadedDefinitionsCache.\n        _subscribable = loadingSubscribablesCache[componentName] = new subscribable();\n        _subscribable.subscribe(callback);\n        beginLoadingComponent(componentName, function (definition, config) {\n            var isSynchronousComponent = !!(config && config.synchronous);\n            loadedDefinitionsCache[componentName] = { definition: definition, isSynchronousComponent: isSynchronousComponent };\n            delete loadingSubscribablesCache[componentName];\n            // For API consistency, all loads complete asynchronously. However we want to avoid\n            // adding an extra task schedule if it's unnecessary (i.e., the completion is already\n            // async).\n            //\n            // You can bypass the 'always asynchronous' feature by putting the synchronous:true\n            // flag on your component configuration when you register it.\n            if (completedAsync || isSynchronousComponent) {\n                // Note that notifySubscribers ignores any dependencies read within the callback.\n                // See comment in loaderRegistryBehaviors.js for reasoning\n                _subscribable.notifySubscribers(definition);\n            }\n            else {\n                tasks.schedule(function () {\n                    _subscribable.notifySubscribers(definition);\n                });\n            }\n        });\n        completedAsync = true;\n    }\n    else {\n        _subscribable.subscribe(callback);\n    }\n}\nfunction beginLoadingComponent(componentName, callback) {\n    getFirstResultFromLoaders('getConfig', [componentName], function (config) {\n        if (config) {\n            // We have a config, so now load its definition\n            getFirstResultFromLoaders('loadComponent', [componentName, config], function (definition) {\n                callback(definition, config);\n            });\n        }\n        else {\n            // The component has no config - it's unknown to all the loaders.\n            // Note that this is not an error (e.g., a module loading error) - that would abort the\n            // process and this callback would not run. For this callback to run, all loaders must\n            // have confirmed they don't know about this component.\n            callback(null, null);\n        }\n    });\n}\nfunction getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders) {\n    // On the first call in the stack, start with the full set of loaders\n    if (!candidateLoaders) {\n        candidateLoaders = registry.loaders.slice(0); // Use a copy, because we'll be mutating this array\n    }\n    // Try the next candidate\n    var currentCandidateLoader = candidateLoaders.shift();\n    if (currentCandidateLoader) {\n        var methodInstance = currentCandidateLoader[methodName];\n        if (methodInstance) {\n            var wasAborted = false, synchronousReturnValue = methodInstance.apply(currentCandidateLoader, argsExceptCallback.concat(function (result) {\n                if (wasAborted) {\n                    callback(null);\n                }\n                else if (result !== null) {\n                    // This candidate returned a value. Use it.\n                    callback(result);\n                }\n                else {\n                    // Try the next candidate\n                    getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n                }\n            }));\n            // Currently, loaders may not return anything synchronously. This leaves open the possibility\n            // that we'll extend the API to support synchronous return values in the future. It won't be\n            // a breaking change, because currently no loader is allowed to return anything except undefined.\n            if (synchronousReturnValue !== undefined) {\n                wasAborted = true;\n                // Method to suppress exceptions will remain undocumented. This is only to keep\n                // KO's specs running tidily, since we can observe the loading got aborted without\n                // having exceptions cluttering up the console too.\n                if (!currentCandidateLoader.suppressLoaderExceptions) {\n                    throw new Error('Component loaders must supply values by invoking the callback, not by returning values synchronously.');\n                }\n            }\n        }\n        else {\n            // This candidate doesn't have the relevant handler. Synchronously move on to the next one.\n            getFirstResultFromLoaders(methodName, argsExceptCallback, callback, candidateLoaders);\n        }\n    }\n    else {\n        // No candidates returned a value\n        callback(null);\n    }\n}\nvar registry = {\n    get: function (componentName, callback) {\n        var cachedDefinition = getObjectOwnProperty(loadedDefinitionsCache, componentName);\n        if (cachedDefinition) {\n            // It's already loaded and cached. Reuse the same definition object.\n            // Note that for API consistency, even cache hits complete asynchronously by default.\n            // You can bypass this by putting synchronous:true on your component config.\n            if (cachedDefinition.isSynchronousComponent) {\n                dependencyDetection.ignore(function () {\n                    callback(cachedDefinition.definition);\n                });\n            }\n            else {\n                tasks.schedule(function () { callback(cachedDefinition.definition); });\n            }\n        }\n        else {\n            // Join the loading process that is already underway, or start a new one.\n            loadComponentAndNotify(componentName, callback);\n        }\n    },\n    clearCachedDefinition: function (componentName) {\n        delete loadedDefinitionsCache[componentName];\n    },\n    _getFirstResultFromLoaders: getFirstResultFromLoaders,\n    loaders: []\n};\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends$1(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// The default loader is responsible for two things:\n// 1. Maintaining the default in-memory registry of component configuration objects\n//    (i.e., the thing you're writing to when you call ko.components.register(someName, ...))\n// 2. Answering requests for components by fetching configuration objects\n//    from that default in-memory registry and resolving them into standard\n//    component definition objects (of the form { createViewModel: ..., template: ... })\n// Custom loaders may override either of these facilities, i.e.,\n// 1. To supply configuration objects from some other source (e.g., conventions)\n// 2. Or, to resolve configuration objects by loading viewmodels/templates via arbitrary logic.\nvar defaultConfigRegistry = {};\nfunction register(componentName, config) {\n    if (!config) {\n        throw new Error('Invalid configuration for ' + componentName);\n    }\n    if (isRegistered(componentName)) {\n        throw new Error('Component ' + componentName + ' is already registered');\n    }\n    defaultConfigRegistry[componentName] = config;\n}\nfunction isRegistered(componentName) {\n    return defaultConfigRegistry.hasOwnProperty(componentName);\n}\nfunction unregister(componentName) {\n    delete defaultConfigRegistry[componentName];\n    registry.clearCachedDefinition(componentName);\n}\nvar defaultLoader = {\n    getConfig: function (componentName, callback) {\n        var result = defaultConfigRegistry.hasOwnProperty(componentName)\n            ? defaultConfigRegistry[componentName]\n            : null;\n        callback(result);\n    },\n    loadComponent: function (componentName, config, callback) {\n        var errorCallback = makeErrorCallback(componentName);\n        possiblyGetConfigFromAmd(errorCallback, config, function (loadedConfig) {\n            resolveConfig(componentName, errorCallback, loadedConfig, callback);\n        });\n    },\n    loadTemplate: function (componentName, templateConfig, callback) {\n        resolveTemplate(makeErrorCallback(componentName), templateConfig, callback);\n    },\n    loadViewModel: function (componentName, viewModelConfig, callback) {\n        resolveViewModel(makeErrorCallback(componentName), viewModelConfig, callback);\n    }\n};\nvar createViewModelKey = 'createViewModel';\n// Takes a config object of the form { template: ..., viewModel: ... }, and asynchronously convert it\n// into the standard component definition format:\n//    { template: <ArrayOfDomNodes>, createViewModel: function(params, componentInfo) { ... } }.\n// Since both template and viewModel may need to be resolved asynchronously, both tasks are performed\n// in parallel, and the results joined when both are ready. We don't depend on any promises infrastructure,\n// so this is implemented manually below.\nfunction resolveConfig(componentName, errorCallback, config, callback) {\n    var result = {}, makeCallBackWhenZero = 2, tryIssueCallback = function () {\n        if (--makeCallBackWhenZero === 0) {\n            callback(result);\n        }\n    }, templateConfig = config['template'], viewModelConfig = config['viewModel'];\n    if (templateConfig) {\n        possiblyGetConfigFromAmd(errorCallback, templateConfig, function (loadedConfig) {\n            registry._getFirstResultFromLoaders('loadTemplate', [componentName, loadedConfig], function (resolvedTemplate) {\n                result['template'] = resolvedTemplate;\n                tryIssueCallback();\n            });\n        });\n    }\n    else {\n        tryIssueCallback();\n    }\n    if (viewModelConfig) {\n        possiblyGetConfigFromAmd(errorCallback, viewModelConfig, function (loadedConfig) {\n            registry._getFirstResultFromLoaders('loadViewModel', [componentName, loadedConfig], function (resolvedViewModel) {\n                result[createViewModelKey] = resolvedViewModel;\n                tryIssueCallback();\n            });\n        });\n    }\n    else {\n        tryIssueCallback();\n    }\n}\nfunction resolveTemplate(errorCallback, templateConfig, callback) {\n    if (typeof templateConfig === 'string') {\n        // Markup - parse it\n        callback(parseHtmlFragment(templateConfig));\n    }\n    else if (templateConfig instanceof Array) {\n        // Assume already an array of DOM nodes - pass through unchanged\n        callback(templateConfig);\n    }\n    else if (isDocumentFragment(templateConfig)) {\n        // Document fragment - use its child nodes\n        callback(makeArray(templateConfig.childNodes));\n    }\n    else if (templateConfig['element']) {\n        var element = templateConfig['element'];\n        if (isDomElement(element)) {\n            // Element instance - copy its child nodes\n            callback(cloneNodesFromTemplateSourceElement(element));\n        }\n        else if (typeof element === 'string') {\n            // Element ID - find it, then copy its child nodes\n            var elemInstance = document.getElementById(element);\n            if (elemInstance) {\n                callback(cloneNodesFromTemplateSourceElement(elemInstance));\n            }\n            else {\n                errorCallback('Cannot find element with ID ' + element);\n            }\n        }\n        else {\n            errorCallback('Unknown element type: ' + element);\n        }\n    }\n    else {\n        errorCallback('Unknown template value: ' + templateConfig);\n    }\n}\nfunction resolveViewModel(errorCallback, viewModelConfig, callback) {\n    if (typeof viewModelConfig === 'function') {\n        // Constructor - convert to standard factory function format\n        // By design, this does *not* supply componentInfo to the constructor, as the intent is that\n        // componentInfo contains non-viewmodel data (e.g., the component's element) that should only\n        // be used in factory functions, not viewmodel constructors.\n        callback(function (params /*, componentInfo */) {\n            return new viewModelConfig(params);\n        });\n    }\n    else if (typeof viewModelConfig[createViewModelKey] === 'function') {\n        // Already a factory function - use it as-is\n        callback(viewModelConfig[createViewModelKey]);\n    }\n    else if ('instance' in viewModelConfig) {\n        // Fixed object instance - promote to createViewModel format for API consistency\n        var fixedInstance = viewModelConfig['instance'];\n        callback(function () {\n            return fixedInstance;\n        });\n    }\n    else if ('viewModel' in viewModelConfig) {\n        // Resolved AMD module whose value is of the form { viewModel: ... }\n        resolveViewModel(errorCallback, viewModelConfig['viewModel'], callback);\n    }\n    else {\n        errorCallback('Unknown viewModel value: ' + viewModelConfig);\n    }\n}\nfunction cloneNodesFromTemplateSourceElement(elemInstance) {\n    switch (tagNameLower(elemInstance)) {\n        case 'script':\n            return parseHtmlFragment(elemInstance.text);\n        case 'textarea':\n            return parseHtmlFragment(elemInstance.value);\n        case 'template':\n            // For browsers with proper <template> element support (i.e., where the .content property\n            // gives a document fragment), use that document fragment.\n            if (isDocumentFragment(elemInstance.content)) {\n                return cloneNodes(elemInstance.content.childNodes);\n            }\n    }\n    // Regular elements such as <div>, and <template> elements on old browsers that don't really\n    // understand <template> and just treat it as a regular container\n    return cloneNodes(elemInstance.childNodes);\n}\nfunction possiblyGetConfigFromAmd(errorCallback, config, callback) {\n    if (typeof config.require === 'string') {\n        // The config is the value of an AMD module\n        if (window.amdRequire || window.require) {\n            (window.amdRequire || window.require)([config.require], callback);\n        }\n        else {\n            errorCallback('Uses require, but no AMD loader is present');\n        }\n    }\n    else {\n        callback(config);\n    }\n}\nfunction makeErrorCallback(componentName) {\n    return function (message) {\n        throw new Error('Component \\'' + componentName + '\\': ' + message);\n    };\n}\n// By default, the default loader is the only registered component loader\nregistry.loaders.push(defaultLoader);\n\n/**\n * Component --- Abstract Base Class\n *\n * This simplifies and compartmentalizes Components.  Use this:\n *\n *    class CompX extends ComponentABC {\n *    \tstatic get element () { return 'comp-x-id' }\n *    \tstatic get sync () { return false }\n *    \tstatic get elementName () { return 'comp-x' }\n *    }\n *    CompX.register()\n *\n * instead of:\n *\n *   class CompX {}\n *\n *   ko.components.register('comp-x', {\n *     viewModel: CompX,\n *     synchronous: false,\n *     template: { element: 'comp-x' }\n *   })\n *\n * As well, gain all the benefits of a LifeCycle, namely automated\n * event and subscription addition/removal.\n *\n * NOTE: A Component created this way can add events to the component node\n * with `this.addEventListener(type, action)`.\n */\nvar ComponentABC = /** @class */ (function (_super) {\n    __extends$1(ComponentABC, _super);\n    function ComponentABC() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ComponentABC, \"elementName\", {\n        /**\n         * @return {string} The custom node name of this component.\n         */\n        get: function () {\n            throw new Error(\"[ComponentABC] `elementName` must be overloaded.\");\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"template\", {\n        /**\n         * Overload this to return:\n         * 1. A string of markup\n         * 2. An array of DOM nodes\n         * 3. A document fragment\n         * 4. An AMD module (with `{require: 'some/template'}`)\n         * @return {mixed} One of the accepted template types for the ComponentBinding.\n         */\n        get: function () { return { element: this.element }; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"element\", {\n        /**\n         * This is called by the default `template`.  Overload this to return:\n         * 1. The element ID\n         * 2. A DOM node itself\n         * @return {string|HTMLElement} either the element ID or actual element.\n         */\n        get: function () {\n            throw new Error(\"[ComponentABC] `element` must be overloaded.\");\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentABC, \"sync\", {\n        /**\n         * @return {bool} True if the component shall load synchronously\n         */\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    ComponentABC.register = function (name) {\n        if (name === void 0) { name = this.elementName; }\n        var viewModel = this;\n        var template = this.template;\n        var synchronous = this.sync;\n        register(name, { viewModel: viewModel, template: template, synchronous: synchronous });\n    };\n    return ComponentABC;\n}(LifeCycle));\n\nvar index = {\n    ComponentABC: ComponentABC,\n    // -- Registry --\n    get: registry.get,\n    clearCachedDefinition: registry.clearCachedDefinition,\n    // -- Loader --\n    register: register,\n    isRegistered: isRegistered,\n    unregister: unregister,\n    defaultLoader: defaultLoader,\n    // \"Privately\" expose the underlying config registry for use in old-IE shim\n    _allRegisteredComponents: defaultConfigRegistry,\n    get loaders() { return registry.loaders; },\n    set loaders(loaders) { registry.loaders = loaders; }\n};\n\nexport default index;\n//# sourceMappingURL=tko.utils.component.js.map\n","import { objectMap, tagNameLower } from 'tko.utils';\nimport registry from 'tko.utils.component';\nimport { isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed } from 'tko.computed';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\nvar ComponentProvider = /** @class */ (function (_super) {\n    __extends(ComponentProvider, _super);\n    function ComponentProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ComponentProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    ComponentProvider.prototype.nodeHasBindings = function (node) {\n        return Boolean(this.getComponentNameForNode(node));\n    };\n    ComponentProvider.prototype.getBindingAccessors = function (node, context) {\n        var _this = this;\n        var componentName = this.getComponentNameForNode(node);\n        if (!componentName) {\n            return;\n        }\n        var component = function () { return ({\n            name: componentName,\n            params: _this.getComponentParams(node, context)\n        }); };\n        return { component: component };\n    };\n    ComponentProvider.prototype.getComponentNameForNode = function (node) {\n        if (node.nodeType !== node.ELEMENT_NODE) {\n            return;\n        }\n        var tagName = tagNameLower(node);\n        if (registry.isRegistered(tagName)) {\n            var hasDash = tagName.includes('-');\n            var isUnknownEntity = ('' + node) === '[object HTMLUnknownElement]';\n            if (hasDash || isUnknownEntity) {\n                return tagName;\n            }\n        }\n    };\n    ComponentProvider.prototype.getComponentParams = function (node, context) {\n        var _this = this;\n        var parser = new Parser(node, context, this.globals);\n        var paramsString = (node.getAttribute('params') || '').trim();\n        var accessors = parser.parse(paramsString, context, node);\n        if (!accessors || Object.keys(accessors).length === 0) {\n            return { $raw: {} };\n        }\n        var $raw = objectMap(accessors, function (value) { return computed(value, null, { disposeWhenNodeIsRemoved: node }); });\n        var params = objectMap($raw, function (v) { return _this.makeParamValue(node, v); });\n        return Object.assign({ $raw: $raw }, params);\n    };\n    ComponentProvider.prototype.makeParamValue = function (node, paramValueComputed) {\n        var paramValue = paramValueComputed.peek();\n        // Does the evaluation of the parameter value unwrap any observables?\n        if (!paramValueComputed.isActive()) {\n            // No it doesn't, so there's no need for any computed wrapper. Just pass through the supplied value directly.\n            // Example: \"someVal: firstName, age: 123\" (whether or not firstName is an observable/computed)\n            return paramValue;\n        }\n        // Yes it does. Supply a computed property that unwraps both the outer (binding expression)\n        // level of observability, and any inner (resulting model value) level of observability.\n        // This means the component doesn't have to worry about multiple unwrapping. If the value is a\n        // writable observable, the computed will also be writable and pass the value on to the observable.\n        var isWriteable = isWriteableObservable(paramValue);\n        return computed({\n            read: function () { return unwrap(paramValueComputed()); },\n            write: isWriteable ? function (v) { return paramValueComputed()(v); } : null,\n            disposeWhenNodeIsRemoved: node\n        });\n    };\n    return ComponentProvider;\n}(Provider));\n\nexport { ComponentProvider };\n//# sourceMappingURL=tko.provider.component.js.map\n","import { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\n/**\n * Convert attributes with ko-* to bindings.\n *\n * e.g.\n * <div ko-visible='value'></div>\n */\nvar AttrProvider = /** @class */ (function (_super) {\n    __extends(AttrProvider, _super);\n    function AttrProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(AttrProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(AttrProvider.prototype, \"PREFIX\", {\n        get: function () { return 'ko-'; },\n        enumerable: true,\n        configurable: true\n    });\n    AttrProvider.prototype.getBindingAttributesList = function (node) {\n        var _this = this;\n        if (!node.hasAttributes()) {\n            return [];\n        }\n        return Array.from(node.attributes)\n            .filter(function (attr) { return attr.name.startsWith(_this.PREFIX); });\n    };\n    AttrProvider.prototype.nodeHasBindings = function (node) {\n        return this.getBindingAttributesList(node).length > 0;\n    };\n    AttrProvider.prototype.getBindingAccessors = function (node, context) {\n        return Object.assign.apply(Object, [{}].concat(this.handlersFromAttributes(node, context)));\n    };\n    AttrProvider.prototype.handlersFromAttributes = function (node, context) {\n        var _this = this;\n        var _loop_1, this_1, _i, _a, attr;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _loop_1 = function (attr) {\n                        var name, _a;\n                        return __generator(this, function (_b) {\n                            switch (_b.label) {\n                                case 0:\n                                    name = attr.name.substr(this_1.PREFIX.length);\n                                    return [4 /*yield*/, (_a = {}, _a[name] = function () { return _this.getValue(attr.value, context, node); }, _a)];\n                                case 1:\n                                    _b.sent();\n                                    return [2 /*return*/];\n                            }\n                        });\n                    };\n                    this_1 = this;\n                    _i = 0, _a = this.getBindingAttributesList(node);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    return [5 /*yield**/, _loop_1(attr)];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttrProvider.prototype.getValue = function (token, $context, node) {\n        /* FIXME: This duplicates Identifier.prototype.lookup_value; it should\n           be refactored into e.g. a BindingContext method */\n        if (!token) {\n            return;\n        }\n        var $data = $context.$data;\n        switch (token) {\n            case '$element': return node;\n            case '$context': return $context;\n            case 'this':\n            case '$data': return $context.$data;\n        }\n        if ($data instanceof Object && token in $data) {\n            return $data[token];\n        }\n        if (token in $context) {\n            return $context[token];\n        }\n        if (token in this.globals) {\n            return this.globals[token];\n        }\n        throw new Error(\"The variable '\" + token + \" not found.\");\n    };\n    return AttrProvider;\n}(Provider));\n\nexport { AttrProvider as AttributeProvider };\n//# sourceMappingURL=tko.provider.attr.js.map\n","import { Provider } from 'tko.provider';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\nvar MultiProvider = /** @class */ (function (_super) {\n    __extends(MultiProvider, _super);\n    function MultiProvider(params) {\n        if (params === void 0) { params = {}; }\n        var _this = _super.call(this, params) || this;\n        var providers = params.providers || [];\n        _this.nodeTypeMap = {};\n        _this.nodeTypes = [];\n        _this.providers = [];\n        providers.forEach(function (p) { return _this.addProvider(p); });\n        return _this;\n    }\n    Object.defineProperty(MultiProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return this.nodeTypes; },\n        enumerable: true,\n        configurable: true\n    });\n    MultiProvider.prototype.addProvider = function (provider) {\n        this.providers.push(provider);\n        provider.bindingHandlers = this.bindingHandlers;\n        provider.globals = this.globals;\n        var nodeTypeMap = this.nodeTypeMap;\n        for (var _i = 0, _a = provider.FOR_NODE_TYPES; _i < _a.length; _i++) {\n            var nodeType = _a[_i];\n            if (!nodeTypeMap[nodeType]) {\n                nodeTypeMap[nodeType] = [];\n            }\n            nodeTypeMap[nodeType].push(provider);\n        }\n        this.nodeTypes = Object.keys(this.nodeTypeMap).map(function (k) { return parseInt(k, 10); });\n    };\n    MultiProvider.prototype.providersFor = function (node) {\n        return this.nodeTypeMap[node.nodeType] || [];\n    };\n    MultiProvider.prototype.nodeHasBindings = function (node) {\n        return this.providersFor(node).some(function (p) { return p.nodeHasBindings(node); });\n    };\n    MultiProvider.prototype.preprocessNode = function (node) {\n        for (var _i = 0, _a = this.providersFor(node); _i < _a.length; _i++) {\n            var provider = _a[_i];\n            var newNodes = provider.preprocessNode(node);\n            if (newNodes) {\n                return newNodes;\n            }\n        }\n    };\n    MultiProvider.prototype.enumerateProviderBindings = function (node, ctx) {\n        var _i, _a, provider, bindings, _b, _c, _d, key, accessor;\n        return __generator(this, function (_e) {\n            switch (_e.label) {\n                case 0:\n                    _i = 0, _a = this.providersFor(node);\n                    _e.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 6];\n                    provider = _a[_i];\n                    bindings = provider.getBindingAccessors(node, ctx) || {};\n                    _b = 0, _c = Object.entries(bindings || {});\n                    _e.label = 2;\n                case 2:\n                    if (!(_b < _c.length)) return [3 /*break*/, 5];\n                    _d = _c[_b], key = _d[0], accessor = _d[1];\n                    return [4 /*yield*/, [key, accessor]];\n                case 3:\n                    _e.sent();\n                    _e.label = 4;\n                case 4:\n                    _b++;\n                    return [3 /*break*/, 2];\n                case 5:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 6: return [2 /*return*/];\n            }\n        });\n    };\n    MultiProvider.prototype.getBindingAccessors = function (node, ctx) {\n        node = this.preprocessNode(node) || node;\n        var bindings = {};\n        for (var _i = 0, _a = this.enumerateProviderBindings(node, ctx); _i < _a.length; _i++) {\n            var _b = _a[_i], key = _b[0], accessor = _b[1];\n            if (key in bindings) {\n                throw new Error(\"The binding \\\"\" + key + \"\\\" is duplicated by multiple providers\");\n            }\n            bindings[key] = accessor;\n        }\n        return bindings;\n    };\n    return MultiProvider;\n}(Provider));\n\nexport { MultiProvider };\n//# sourceMappingURL=tko.provider.multi.js.map\n","import { unwrap } from 'tko.observable';\nimport { Provider } from 'tko.provider';\nimport { Parser } from 'tko.utils.parser';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\r\n\r\n\r\n\r\nfunction __values(o) {\r\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n    if (m) return m.call(o);\r\n    return {\r\n        next: function () {\r\n            if (o && i >= o.length) o = void 0;\r\n            return { value: o && o[i++], done: !o };\r\n        }\r\n    };\r\n}\n\nvar INNER_EXPRESSION = /^([\\s\\S]*)}}([\\s\\S]*?)\\{\\{([\\s\\S]*)$/;\nvar OUTER_EXPRESSION = /^([\\s\\S]*?)\\{\\{([\\s\\S]*)}}([\\s\\S]*)$/;\nvar BINDING_EXPRESSION = /^([^,\"'{}()/:[\\]\\s]+)\\s+([^\\s:].*)/;\nvar Interpolated = /** @class */ (function () {\n    function Interpolated(text) {\n        this.text = text;\n    }\n    Interpolated.prototype.trim = function (string) {\n        return string === null ? '' : string.trim();\n    };\n    return Interpolated;\n}());\nvar Expression = /** @class */ (function (_super) {\n    __extends(Expression, _super);\n    function Expression() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Expression.prototype.asAttr = function (context, globals, node) {\n        return new Parser().parseExpression(this.text, context, globals, node)();\n    };\n    Expression.prototype.textNodeReplacement = function (textNode) {\n        var text, ownerDocument, firstChar, lastChar, closeComment, binding, matches;\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0:\n                    text = this.trim(this.text);\n                    ownerDocument = textNode ? textNode.ownerDocument : document;\n                    firstChar = text[0];\n                    lastChar = text[text.length - 1];\n                    closeComment = true;\n                    if (firstChar === '#') {\n                        if (lastChar === '/') {\n                            binding = text.slice(1, -1);\n                        }\n                        else {\n                            binding = text.slice(1);\n                            closeComment = false;\n                        }\n                        matches = binding.match(BINDING_EXPRESSION);\n                        if (matches) {\n                            binding = matches[1] + ':' + matches[2];\n                        }\n                    }\n                    else if (firstChar === '/') {\n                        // replace only with a closing comment\n                    }\n                    else if (firstChar === '{' && lastChar === '}') {\n                        binding = 'html:' + this.trim(text.slice(1, -1));\n                    }\n                    else {\n                        binding = 'text:' + this.trim(text);\n                    }\n                    if (!binding) return [3 /*break*/, 2];\n                    return [4 /*yield*/, ownerDocument.createComment('ko ' + binding)];\n                case 1:\n                    _a.sent();\n                    _a.label = 2;\n                case 2:\n                    if (!closeComment) return [3 /*break*/, 4];\n                    return [4 /*yield*/, ownerDocument.createComment('/ko')];\n                case 3:\n                    _a.sent();\n                    _a.label = 4;\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    return Expression;\n}(Interpolated));\nvar Text = /** @class */ (function (_super) {\n    __extends(Text, _super);\n    function Text() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Text.prototype.asAttr = function () { return this.text; };\n    Text.prototype.textNodeReplacement = function () {\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0: return [4 /*yield*/, document.createTextNode(this.text.replace(/\"/g, '\\\\\"'))];\n                case 1:\n                    _a.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    return Text;\n}(Interpolated));\n/**\n *          Interpolation Parsing\n */\nfunction innerParse(text) {\n    var innerMatch, _a, pre, inner, post;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                innerMatch = text.match(INNER_EXPRESSION);\n                if (!innerMatch) return [3 /*break*/, 4];\n                _a = innerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];\n                return [5 /*yield**/, __values(innerParse(pre))];\n            case 1:\n                _b.sent();\n                return [4 /*yield*/, new Text(inner)];\n            case 2:\n                _b.sent();\n                return [4 /*yield*/, new Expression(post)];\n            case 3:\n                _b.sent();\n                return [3 /*break*/, 6];\n            case 4: return [4 /*yield*/, new Expression(text)];\n            case 5:\n                _b.sent();\n                _b.label = 6;\n            case 6: return [2 /*return*/];\n        }\n    });\n}\nfunction parseOuterMatch(outerMatch) {\n    var _a, pre, inner, post;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                if (!outerMatch) {\n                    return [2 /*return*/];\n                }\n                _a = outerMatch.slice(1), pre = _a[0], inner = _a[1], post = _a[2];\n                return [4 /*yield*/, new Text(pre)];\n            case 1:\n                _b.sent();\n                return [5 /*yield**/, __values(innerParse(inner))];\n            case 2:\n                _b.sent();\n                return [4 /*yield*/, new Text(post)];\n            case 3:\n                _b.sent();\n                return [2 /*return*/];\n        }\n    });\n}\nfunction parseInterpolation(text) {\n    var _i, _a, textOrExpr;\n    return __generator(this, function (_b) {\n        switch (_b.label) {\n            case 0:\n                _i = 0, _a = parseOuterMatch(text.match(OUTER_EXPRESSION));\n                _b.label = 1;\n            case 1:\n                if (!(_i < _a.length)) return [3 /*break*/, 4];\n                textOrExpr = _a[_i];\n                if (!textOrExpr.text) return [3 /*break*/, 3];\n                return [4 /*yield*/, textOrExpr];\n            case 2:\n                _b.sent();\n                _b.label = 3;\n            case 3:\n                _i++;\n                return [3 /*break*/, 1];\n            case 4: return [2 /*return*/];\n        }\n    });\n}\n\n/**\n * These are bindings that are mapped specific attributes, such as\n * two-way communication (value/checked) or which have anti-collision\n * properties (css).\n */\nvar DEFAULT_ATTRIBUTE_BINDING_MAP = {\n    value: 'value',\n    checked: 'checked',\n    \"class\": 'css'\n};\n/**\n *  Interpret {{ }} inside DOM attributes e.g. <div class='{{ classes }}'>\n */\nvar AttributeMustacheProvider = /** @class */ (function (_super) {\n    __extends(AttributeMustacheProvider, _super);\n    function AttributeMustacheProvider(params) {\n        if (params === void 0) { params = {}; }\n        var _this = _super.call(this, params) || this;\n        _this.ATTRIBUTES_TO_SKIP = new Set(params.attributesToSkip || ['data-bind']);\n        _this.ATTRIBUTES_BINDING_MAP = params.attributesBindingMap || DEFAULT_ATTRIBUTE_BINDING_MAP;\n        return _this;\n    }\n    Object.defineProperty(AttributeMustacheProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [1]; } // document.ELEMENT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    AttributeMustacheProvider.prototype.attributesToInterpolate = function (attributes) {\n        var _i, _a, attr;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _i = 0, _a = Array.from(attributes);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    if (this.ATTRIBUTES_TO_SKIP.has(attr.name)) {\n                        return [3 /*break*/, 3];\n                    }\n                    if (!(attr.specified && attr.value.includes('{{'))) return [3 /*break*/, 3];\n                    return [4 /*yield*/, attr];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.nodeHasBindings = function (node) {\n        return !this.attributesToInterpolate(node.attributes).next().done;\n    };\n    AttributeMustacheProvider.prototype.partsTogether = function (parts, context, node) {\n        var _this = this;\n        var valueToWrite = [];\n        for (var _i = 3; _i < arguments.length; _i++) {\n            valueToWrite[_i - 3] = arguments[_i];\n        }\n        if (parts.length > 1) {\n            return parts\n                .map(function (p) { return unwrap(p.asAttr(context, _this.globals, node)); }).join('');\n        }\n        // It may be a writeable observable e.g. value=\"{{ value }}\".\n        var part = parts[0].asAttr(context, this.globals);\n        if (valueToWrite.length) {\n            part(valueToWrite[0]);\n        }\n        return part;\n    };\n    AttributeMustacheProvider.prototype.attributeBinding = function (name, parts) {\n        return [name, parts];\n    };\n    AttributeMustacheProvider.prototype.bindingParts = function (node, context) {\n        var _i, _a, attr, parts;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    _i = 0, _a = this.attributesToInterpolate(node.attributes);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    attr = _a[_i];\n                    parts = Array.from(parseInterpolation(attr.value));\n                    if (!parts.length) return [3 /*break*/, 3];\n                    return [4 /*yield*/, this.attributeBinding(attr.name, parts)];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.getPossibleDirectBinding = function (attrName) {\n        var bindingName = this.ATTRIBUTES_BINDING_MAP[attrName];\n        return bindingName && this.bindingHandlers.get(attrName);\n    };\n    AttributeMustacheProvider.prototype.bindingObjects = function (node, context) {\n        var _this = this;\n        var _loop_1, this_1, _i, _a, _b, attrName, parts;\n        return __generator(this, function (_c) {\n            switch (_c.label) {\n                case 0:\n                    _loop_1 = function (attrName, parts) {\n                        var bindingForAttribute, handler, accessorFn, _a;\n                        return __generator(this, function (_b) {\n                            switch (_b.label) {\n                                case 0:\n                                    bindingForAttribute = this_1.getPossibleDirectBinding(attrName);\n                                    handler = bindingForAttribute ? attrName : \"attr.\" + attrName;\n                                    accessorFn = bindingForAttribute\n                                        ? function () {\n                                            var v = [];\n                                            for (var _i = 0; _i < arguments.length; _i++) {\n                                                v[_i] = arguments[_i];\n                                            }\n                                            return _this.partsTogether.apply(_this, [parts, context, node].concat(v));\n                                        }\n                                        : function () {\n                                            var v = [];\n                                            for (var _i = 0; _i < arguments.length; _i++) {\n                                                v[_i] = arguments[_i];\n                                            }\n                                            return (_a = {}, _a[attrName] = _this.partsTogether.apply(_this, [parts, context, node].concat(v)), _a);\n                                            var _a;\n                                        };\n                                    node.removeAttribute(attrName);\n                                    return [4 /*yield*/, (_a = {}, _a[handler] = accessorFn, _a)];\n                                case 1:\n                                    _b.sent();\n                                    return [2 /*return*/];\n                            }\n                        });\n                    };\n                    this_1 = this;\n                    _i = 0, _a = this.bindingParts(node, context);\n                    _c.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    _b = _a[_i], attrName = _b[0], parts = _b[1];\n                    return [5 /*yield**/, _loop_1(attrName, parts)];\n                case 2:\n                    _c.sent();\n                    _c.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    AttributeMustacheProvider.prototype.getBindingAccessors = function (node, context) {\n        return Object.assign.apply(Object, [{}].concat(this.bindingObjects(node, context)));\n    };\n    return AttributeMustacheProvider;\n}(Provider));\n\n/**\n * Interpret {{ }}, {{{ }}}, {{# /}}, and {{# }} ... {{/ }} inside text nodes.\n *\n * This binding must come before the VirtualProvider.\n */\nvar TextMustacheProvider = /** @class */ (function (_super) {\n    __extends(TextMustacheProvider, _super);\n    function TextMustacheProvider() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(TextMustacheProvider.prototype, \"FOR_NODE_TYPES\", {\n        get: function () { return [3]; } // document.TEXT_NODE\n        ,\n        enumerable: true,\n        configurable: true\n    });\n    TextMustacheProvider.prototype.textToNodes = function (textNode) {\n        var parent, isTextarea, hasStash, _i, _a, part;\n        return __generator(this, function (_b) {\n            switch (_b.label) {\n                case 0:\n                    parent = textNode.parentNode;\n                    isTextarea = parent && parent.nodeName === 'TEXTAREA';\n                    hasStash = textNode.nodeValue && textNode.nodeValue.includes('{{');\n                    if (!hasStash || isTextarea) {\n                        return [2 /*return*/];\n                    }\n                    _i = 0, _a = parseInterpolation(textNode.nodeValue);\n                    _b.label = 1;\n                case 1:\n                    if (!(_i < _a.length)) return [3 /*break*/, 4];\n                    part = _a[_i];\n                    return [5 /*yield**/, __values(part.textNodeReplacement(textNode))];\n                case 2:\n                    _b.sent();\n                    _b.label = 3;\n                case 3:\n                    _i++;\n                    return [3 /*break*/, 1];\n                case 4: return [2 /*return*/];\n            }\n        });\n    };\n    TextMustacheProvider.prototype.textInterpolation = function (textNode) {\n        var newNodes = Array.from(this.textToNodes(textNode));\n        if (newNodes.length === 0) {\n            return;\n        }\n        if (textNode.parentNode) {\n            var parent = textNode.parentNode;\n            var n = newNodes.length;\n            for (var i = 0; i < n; ++i) {\n                parent.insertBefore(newNodes[i], textNode);\n            }\n            parent.removeChild(textNode);\n        }\n        return newNodes;\n    };\n    /**\n     * We convert as follows:\n     *\n     *   {{# ... }} into <!-- ko ... -->\n     *   {{/ ... }} into <!-- /ko -->\n     *   {{# ... /}} into <!-- ko ... --><!-- /ko -->\n     *   {{ ... }} into <!-- ko text: ... --><!-- /ko -->\n     *   {{{ ... }}} into <!-- ko html: ... --><!-- /ko -->\n     *\n     * VirtualProvider can then pick up and do the actual binding.\n     */\n    TextMustacheProvider.prototype.preprocessNode = function (node) {\n        return this.textInterpolation(node);\n    };\n    return TextMustacheProvider;\n}(Provider));\n\nexport { AttributeMustacheProvider, TextMustacheProvider, parseInterpolation };\n//# sourceMappingURL=tko.provider.mustache.js.map\n","import { addDisposeCallback, anyDomNodeIsAttachedToDocument, arrayForEach, arrayIndexOf, arrayMap, arrayPushAll, arrayRemoveItem, cleanNode, compareArrays, domData, extend, fixUpContinuousNodeArray, objectForEach, objectMap, options, removeNode, replaceDomNodes, tagNameLower, virtualElements } from 'tko.utils';\nimport { computed } from 'tko.computed';\nimport { dependencyDetection, isObservable, observable, unwrap } from 'tko.observable';\nimport { LifeCycle } from 'tko.lifecycle';\n\nvar storedBindingContextDomDataKey = domData.nextKey();\n// The bindingContext constructor is only called directly to create the root context. For child\n// contexts, use bindingContext.createChildContext or bindingContext.extend.\nfunction bindingContext(dataItemOrAccessor, parentContext, dataItemAlias, extendCallback, settings) {\n    var self = this, isFunc = typeof (dataItemOrAccessor) == \"function\" && !isObservable(dataItemOrAccessor), nodes, subscribable;\n    // The binding context object includes static properties for the current, parent, and root view models.\n    // If a view model is actually stored in an observable, the corresponding binding context object, and\n    // any child contexts, must be updated when the view model is changed.\n    function updateContext() {\n        // Most of the time, the context will directly get a view model object, but if a function is given,\n        // we call the function to retrieve the view model. If the function accesses any observables or returns\n        // an observable, the dependency is tracked, and those observables can later cause the binding\n        // context to be updated.\n        var dataItemOrObservable = isFunc ? dataItemOrAccessor() : dataItemOrAccessor, dataItem = unwrap(dataItemOrObservable);\n        if (parentContext) {\n            // When a \"parent\" context is given, register a dependency on the parent context. Thus whenever the\n            // parent context is updated, this context will also be updated.\n            if (parentContext._subscribable)\n                parentContext._subscribable();\n            // Copy $root and any custom properties from the parent context\n            extend(self, parentContext);\n            // Because the above copy overwrites our own properties, we need to reset them.\n            self._subscribable = subscribable;\n        }\n        else {\n            self.$parents = [];\n            self.$root = dataItem;\n            // Export 'ko' in the binding context so it will be available in bindings and templates\n            // even if 'ko' isn't exported as a global, such as when using an AMD loader.\n            // See https://github.com/SteveSanderson/knockout/issues/490\n            self.ko = options.knockoutInstance;\n        }\n        self.$rawData = dataItemOrObservable;\n        self.$data = dataItem;\n        if (dataItemAlias)\n            self[dataItemAlias] = dataItem;\n        // The extendCallback function is provided when creating a child context or extending a context.\n        // It handles the specific actions needed to finish setting up the binding context. Actions in this\n        // function could also add dependencies to this binding context.\n        if (extendCallback)\n            extendCallback(self, parentContext, dataItem);\n        return self.$data;\n    }\n    function disposeWhen() {\n        return nodes && !anyDomNodeIsAttachedToDocument(nodes);\n    }\n    if (settings && settings.exportDependencies) {\n        // The \"exportDependencies\" option means that the calling code will track any dependencies and re-create\n        // the binding context when they change.\n        updateContext();\n        return;\n    }\n    subscribable = computed(updateContext, null, { disposeWhen: disposeWhen, disposeWhenNodeIsRemoved: true });\n    // At this point, the binding context has been initialized, and the \"subscribable\" computed observable is\n    // subscribed to any observables that were accessed in the process. If there is nothing to track, the\n    // computed will be inactive, and we can safely throw it away. If it's active, the computed is stored in\n    // the context object.\n    if (subscribable.isActive()) {\n        self._subscribable = subscribable;\n        // Always notify because even if the model ($data) hasn't changed, other context properties might have changed\n        subscribable.equalityComparer = null;\n        // We need to be able to dispose of this computed observable when it's no longer needed. This would be\n        // easy if we had a single node to watch, but binding contexts can be used by many different nodes, and\n        // we cannot assume that those nodes have any relation to each other. So instead we track any node that\n        // the context is attached to, and dispose the computed when all of those nodes have been cleaned.\n        // Add properties to *subscribable* instead of *self* because any properties added to *self* may be overwritten on updates\n        nodes = [];\n        subscribable._addNode = function (node) {\n            nodes.push(node);\n            addDisposeCallback(node, function (node) {\n                arrayRemoveItem(nodes, node);\n                if (!nodes.length) {\n                    subscribable.dispose();\n                    self._subscribable = subscribable = undefined;\n                }\n            });\n        };\n    }\n}\nbindingContext.prototype.lookup = function (token, globals, node) {\n    // short circuits\n    switch (token) {\n        case '$element': return node;\n        case '$context': return this;\n        case 'this':\n        case '$data': return this.$data;\n    }\n    var $data = this.$data;\n    // instanceof Object covers 1. {}, 2. [], 3. function() {}, 4. new *;  it excludes undefined, null, primitives.\n    if ($data instanceof Object && token in $data) {\n        return $data[token];\n    }\n    if (token in this) {\n        return this[token];\n    }\n    if (token in globals) {\n        return globals[token];\n    }\n    throw new Error(\"The variable \\\"\" + token + \"\\\" was not found on $data, $context, or globals.\");\n};\n// Extend the binding context hierarchy with a new view model object. If the parent context is watching\n// any observables, the new child context will automatically get a dependency on the parent context.\n// But this does not mean that the $data value of the child context will also get updated. If the child\n// view model also depends on the parent view model, you must provide a function that returns the correct\n// view model on each update.\nbindingContext.prototype.createChildContext = function (dataItemOrAccessor, dataItemAlias, extendCallback, settings) {\n    return new bindingContext(dataItemOrAccessor, this, dataItemAlias, function (self, parentContext) {\n        // Extend the context hierarchy by setting the appropriate pointers\n        self.$parentContext = parentContext;\n        self.$parent = parentContext.$data;\n        self.$parents = (parentContext.$parents || []).slice(0);\n        self.$parents.unshift(self.$parent);\n        if (extendCallback)\n            extendCallback(self);\n    }, settings);\n};\n// Extend the binding context with new custom properties. This doesn't change the context hierarchy.\n// Similarly to \"child\" contexts, provide a function here to make sure that the correct values are set\n// when an observable view model is updated.\nbindingContext.prototype.extend = function (properties) {\n    // If the parent context references an observable view model, \"_subscribable\" will always be the\n    // latest view model object. If not, \"_subscribable\" isn't set, and we can use the static \"$data\" value.\n    return new bindingContext(this._subscribable || this.$data, this, null, function (self, parentContext) {\n        // This \"child\" context doesn't directly track a parent observable view model,\n        // so we need to manually set the $rawData value to match the parent.\n        self.$rawData = parentContext.$rawData;\n        extend(self, typeof (properties) === \"function\" ? properties() : properties);\n    });\n};\nbindingContext.prototype.createStaticChildContext = function (dataItemOrAccessor, dataItemAlias) {\n    return this.createChildContext(dataItemOrAccessor, dataItemAlias, null, { \"exportDependencies\": true });\n};\nfunction storedBindingContextForNode(node, bindingContext) {\n    if (arguments.length == 2) {\n        domData.set(node, storedBindingContextDomDataKey, bindingContext);\n        if (bindingContext._subscribable)\n            bindingContext._subscribable._addNode(node);\n    }\n    else {\n        return domData.get(node, storedBindingContextDomDataKey);\n    }\n}\n// Retrieving binding context from arbitrary nodes\nfunction contextFor(node) {\n    // We can only do something meaningful for elements and comment nodes (in particular, not text nodes, as IE can't store domdata for them)\n    switch (node.nodeType) {\n        case 1:\n        case 8:\n            var context = storedBindingContextForNode(node);\n            if (context)\n                return context;\n            if (node.parentNode)\n                return contextFor(node.parentNode);\n            break;\n    }\n    return undefined;\n}\nfunction dataFor(node) {\n    var context = contextFor(node);\n    return context ? context.$data : undefined;\n}\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends$1(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nfunction __generator(thisArg, body) {\r\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n    function verb(n) { return function (v) { return step([n, v]); }; }\r\n    function step(op) {\r\n        if (f) throw new TypeError(\"Generator is already executing.\");\r\n        while (_) try {\r\n            if (f = 1, y && (t = y[op[0] & 2 ? \"return\" : op[0] ? \"throw\" : \"next\"]) && !(t = t.call(y, op[1])).done) return t;\r\n            if (y = 0, t) op = [0, t.value];\r\n            switch (op[0]) {\r\n                case 0: case 1: t = op; break;\r\n                case 4: _.label++; return { value: op[1], done: false };\r\n                case 5: _.label++; y = op[1]; op = [0]; continue;\r\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n                default:\r\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n                    if (t[2]) _.ops.pop();\r\n                    _.trys.pop(); continue;\r\n            }\r\n            op = body.call(thisArg, _);\r\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n    }\r\n}\n\nvar BindingHandler = /** @class */ (function (_super) {\n    __extends$1(BindingHandler, _super);\n    function BindingHandler(params) {\n        var _this = _super.call(this) || this;\n        var $element = params.$element, valueAccessor = params.valueAccessor, allBindings = params.allBindings, $context = params.$context;\n        Object.assign(_this, {\n            valueAccessor: valueAccessor,\n            allBindings: allBindings,\n            $element: $element,\n            $context: $context,\n            $data: $context.$data\n        });\n        _this.anchorTo($element);\n        return _this;\n    }\n    Object.defineProperty(BindingHandler.prototype, \"value\", {\n        get: function () { return this.valueAccessor(); },\n        set: function (v) { return this.valueAccessor(v); },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler, \"allowVirtualElements\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler, \"isBindingHandlerClass\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(BindingHandler.prototype, \"bindingCompleted\", {\n        /* Overload this for asynchronous bindings or bindings that recursively\n           apply bindings (e.g. components, foreach, template).\n      \n           A binding should be complete when it has run through once, notably\n           in server-side bindings for pre-rendering.\n        */\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    BindingHandler.registerAs = function (name, provider) {\n        if (provider === void 0) { provider = options.bindingProviderInstance; }\n        provider.bindingHandlers.set(name, this);\n    };\n    return BindingHandler;\n}(LifeCycle));\n/**\n * An AsyncBindingHandler shall call `completeBinding` when the binding\n * is to be considered complete.\n */\nvar AsyncBindingHandler = /** @class */ (function (_super) {\n    __extends$1(AsyncBindingHandler, _super);\n    function AsyncBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        _this.bindingCompletion = new options.Promise(function (resolve) { _this.completeBinding = resolve; });\n        return _this;\n    }\n    Object.defineProperty(AsyncBindingHandler.prototype, \"bindingCompleted\", {\n        get: function () { return this.bindingCompletion; },\n        enumerable: true,\n        configurable: true\n    });\n    return AsyncBindingHandler;\n}(BindingHandler));\n\n/**\n * We have no guarantees, for users employing legacy bindings,\n * that it has not been changed with a modification like\n *\n *    ko.bindingHandlers[name] = { init: ...}\n *\n * ... so we have to keep track by way of a map.\n */\nvar PossibleWeakMap = options.global.WeakMap || Map;\nvar legacyBindingMap = new PossibleWeakMap();\nvar LegacyBindingHandler = /** @class */ (function (_super) {\n    __extends$1(LegacyBindingHandler, _super);\n    function LegacyBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        var handler = _this.handler;\n        if (typeof handler.dispose === 'function') {\n            _this.addDisposable(handler);\n        }\n        try {\n            _this.initReturn = handler.init && handler.init.apply(handler, _this.legacyArgs);\n        }\n        catch (e) {\n            params.onError('init', e);\n        }\n        if (typeof handler.update === 'function') {\n            _this.computed(function () {\n                try {\n                    handler.update.apply(handler, _this.legacyArgs);\n                }\n                catch (e) {\n                    params.onError('update', e);\n                }\n            });\n        }\n        return _this;\n    }\n    Object.defineProperty(LegacyBindingHandler.prototype, \"legacyArgs\", {\n        get: function () {\n            return [\n                this.$element, this.valueAccessor, this.allBindings,\n                this.$data, this.$context\n            ];\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(LegacyBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () {\n            var objectToTest = this.initReturn || this.handler || {};\n            return objectToTest.controlsDescendantBindings;\n        },\n        enumerable: true,\n        configurable: true\n    });\n    /**\n     * Create a handler instance from the `origin`, which may be:\n     *\n     * 1. an object (becomes LegacyBindingHandler)\n     * 2. a function (becomes LegacyBindingHandler with `init: function`)\n     *\n     * If given an object (the only kind supported in knockout 3.x and before), it\n     * shall draw the `init`, `update`, and `allowVirtualElements` properties\n     */\n    LegacyBindingHandler.getOrCreateFor = function (key, handler) {\n        if (legacyBindingMap.has(handler)) {\n            return legacyBindingMap.get(handler);\n        }\n        var newLegacyHandler = this.createFor(key, handler);\n        legacyBindingMap.set(handler, newLegacyHandler);\n        return newLegacyHandler;\n    };\n    LegacyBindingHandler.createFor = function (key, handler) {\n        if (typeof handler === 'function') {\n            var _a = [handler, handler.dispose], initFn_1 = _a[0], disposeFn_1 = _a[1];\n            return /** @class */ (function (_super) {\n                __extends$1(class_1, _super);\n                function class_1() {\n                    return _super !== null && _super.apply(this, arguments) || this;\n                }\n                Object.defineProperty(class_1.prototype, \"handler\", {\n                    get: function () {\n                        var init = initFn_1.bind(this);\n                        var dispose = disposeFn_1 ? disposeFn_1.bind(this) : null;\n                        return { init: init, dispose: dispose };\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_1, \"after\", {\n                    get: function () { return handler.after; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_1, \"allowVirtualElements\", {\n                    get: function () {\n                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                return class_1;\n            }(LegacyBindingHandler));\n        }\n        if (typeof handler === 'object') {\n            return /** @class */ (function (_super) {\n                __extends$1(class_2, _super);\n                function class_2() {\n                    return _super !== null && _super.apply(this, arguments) || this;\n                }\n                Object.defineProperty(class_2.prototype, \"handler\", {\n                    get: function () { return handler; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_2, \"after\", {\n                    get: function () { return handler.after; },\n                    enumerable: true,\n                    configurable: true\n                });\n                Object.defineProperty(class_2, \"allowVirtualElements\", {\n                    get: function () {\n                        return handler.allowVirtualElements || virtualElements.allowedBindings[key];\n                    },\n                    enumerable: true,\n                    configurable: true\n                });\n                return class_2;\n            }(LegacyBindingHandler));\n        }\n        throw new Error('The given handler is not an appropriate type.');\n    };\n    return LegacyBindingHandler;\n}(BindingHandler));\n\n/* eslint no-cond-assign: 0 */\n// The following element types will not be recursed into during binding.\nvar bindingDoesNotRecurseIntoElementTypes = {\n    // Don't want bindings that operate on text nodes to mutate <script> and <textarea> contents,\n    // because it's unexpected and a potential XSS issue.\n    // Also bindings should not operate on <template> elements since this breaks in Internet Explorer\n    // and because such elements' contents are always intended to be bound in a different context\n    // from where they appear in the document.\n    'script': true,\n    'textarea': true,\n    'template': true\n};\n// Use an overridable method for retrieving binding handlers so that a plugins may support dynamically created handlers\nfunction getBindingHandler(bindingKey) {\n    var handler = options.bindingProviderInstance.bindingHandlers.get(bindingKey);\n    if (!handler) {\n        return;\n    }\n    if (handler.isBindingHandlerClass) {\n        return handler;\n    }\n    return LegacyBindingHandler.getOrCreateFor(bindingKey, handler);\n}\n// Returns the valueAccesor function for a binding value\nfunction makeValueAccessor(value) {\n    return function () {\n        return value;\n    };\n}\n// Returns the value of a valueAccessor function\nfunction evaluateValueAccessor(valueAccessor) {\n    return valueAccessor();\n}\n// Given a function that returns bindings, create and return a new object that contains\n// binding value-accessors functions. Each accessor function calls the original function\n// so that it always gets the latest value and all dependencies are captured. This is used\n// by ko.applyBindingsToNode and getBindingsAndMakeAccessors.\nfunction makeAccessorsFromFunction(callback) {\n    return objectMap(dependencyDetection.ignore(callback), function (value, key) {\n        return function () {\n            return callback()[key];\n        };\n    });\n}\n// Given a bindings function or object, create and return a new object that contains\n// binding value-accessors functions. This is used by ko.applyBindingsToNode.\nfunction makeBindingAccessors(bindings, context, node) {\n    if (typeof bindings === 'function') {\n        return makeAccessorsFromFunction(bindings.bind(null, context, node));\n    }\n    else {\n        return objectMap(bindings, makeValueAccessor);\n    }\n}\n// This function is used if the binding provider doesn't include a getBindingAccessors function.\n// It must be called with 'this' set to the provider instance.\nfunction getBindingsAndMakeAccessors(node, context) {\n    return makeAccessorsFromFunction(this.getBindings.bind(this, node, context));\n}\nfunction applyBindingsToDescendantsInternal(bindingContext$$1, elementOrVirtualElement, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied) {\n    var currentChild;\n    var nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n    var provider = options.bindingProviderInstance;\n    var preprocessNode = provider.preprocessNode;\n    // Preprocessing allows a binding provider to mutate a node before bindings are applied to it. For example it's\n    // possible to insert new siblings after it, and/or replace the node with a different one. This can be used to\n    // implement custom binding syntaxes, such as {{ value }} for string interpolation, or custom element types that\n    // trigger insertion of <template> contents at that point in the document.\n    if (preprocessNode) {\n        while (currentChild = nextInQueue) {\n            nextInQueue = virtualElements.nextSibling(currentChild);\n            preprocessNode.call(provider, currentChild);\n        }\n        // Reset nextInQueue for the next loop\n        nextInQueue = virtualElements.firstChild(elementOrVirtualElement);\n    }\n    while (currentChild = nextInQueue) {\n        // Keep a record of the next child *before* applying bindings, in case the binding removes the current child from its position\n        nextInQueue = virtualElements.nextSibling(currentChild);\n        applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, currentChild, bindingContextsMayDifferFromDomParentElement, asyncBindingsApplied);\n    }\n}\nfunction hasBindings(node) {\n    var provider = options.bindingProviderInstance;\n    return provider.FOR_NODE_TYPES.includes(node.nodeType) && provider.nodeHasBindings(node);\n}\nfunction applyBindingsToNodeAndDescendantsInternal(bindingContext$$1, nodeVerified, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Perf optimisation: Apply bindings only if...\n    // (1) We need to store the binding context on this node (because it may differ from the DOM parent node's binding context)\n    //     Note that we can't store binding contexts on non-elements (e.g., text nodes), as IE doesn't allow expando properties for those\n    // (2) It might have bindings (e.g., it has a data-bind attribute, or it's a marker for a containerless template)\n    var isElement = nodeVerified.nodeType === 1;\n    if (isElement) {\n        virtualElements.normaliseVirtualElementDomStructure(nodeVerified);\n    }\n    var shouldApplyBindings = (isElement && bindingContextMayDifferFromDomParentElement) || // Case (1)\n        hasBindings(nodeVerified); // Case (2)\n    var shouldBindDescendants = (shouldApplyBindings\n        ? applyBindingsToNodeInternal(nodeVerified, null, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied)\n        : { shouldBindDescendants: true }).shouldBindDescendants;\n    if (shouldBindDescendants && !bindingDoesNotRecurseIntoElementTypes[tagNameLower(nodeVerified)]) {\n        // We're recursing automatically into (real or virtual) child nodes without changing binding contexts. So,\n        //  * For children of a *real* element, the binding context is certainly the same as on their DOM .parentNode,\n        //    hence bindingContextsMayDifferFromDomParentElement is false\n        //  * For children of a *virtual* element, we can't be sure. Evaluating .parentNode on those children may\n        //    skip over any number of intermediate virtual elements, any of which might define a custom binding context,\n        //    hence bindingContextsMayDifferFromDomParentElement is true\n        applyBindingsToDescendantsInternal(bindingContext$$1, nodeVerified, /* bindingContextsMayDifferFromDomParentElement: */ !isElement, asyncBindingsApplied);\n    }\n}\nvar boundElementDomDataKey = domData.nextKey();\nfunction topologicalSortBindings(bindings) {\n    var results, bindingsConsidered, cyclicDependencyStack, _i, results_1, result;\n    return __generator(this, function (_a) {\n        switch (_a.label) {\n            case 0:\n                results = [];\n                bindingsConsidered = {} // A temporary record of which bindings are already in 'result'\n                ;\n                cyclicDependencyStack = [] // Keeps track of a depth-search so that, if there's a cycle, we know which bindings caused it\n                ;\n                objectForEach(bindings, function pushBinding(bindingKey) {\n                    if (!bindingsConsidered[bindingKey]) {\n                        var binding = getBindingHandler(bindingKey);\n                        if (!binding) {\n                            return;\n                        }\n                        // First add dependencies (if any) of the current binding\n                        if (binding.after) {\n                            cyclicDependencyStack.push(bindingKey);\n                            arrayForEach(binding.after, function (bindingDependencyKey) {\n                                if (!bindings[bindingDependencyKey]) {\n                                    return;\n                                }\n                                if (arrayIndexOf(cyclicDependencyStack, bindingDependencyKey) !== -1) {\n                                    throw Error('Cannot combine the following bindings, because they have a cyclic dependency: ' + cyclicDependencyStack.join(', '));\n                                }\n                                else {\n                                    pushBinding(bindingDependencyKey);\n                                }\n                            });\n                            cyclicDependencyStack.length--;\n                        }\n                        // Next add the current binding\n                        results.push([bindingKey, binding]);\n                    }\n                    bindingsConsidered[bindingKey] = true;\n                });\n                _i = 0, results_1 = results;\n                _a.label = 1;\n            case 1:\n                if (!(_i < results_1.length)) return [3 /*break*/, 4];\n                result = results_1[_i];\n                return [4 /*yield*/, result];\n            case 2:\n                _a.sent();\n                _a.label = 3;\n            case 3:\n                _i++;\n                return [3 /*break*/, 1];\n            case 4: return [2 /*return*/];\n        }\n    });\n}\nfunction applyBindingsToNodeInternal(node, sourceBindings, bindingContext$$1, bindingContextMayDifferFromDomParentElement, asyncBindingsApplied) {\n    // Prevent multiple applyBindings calls for the same node, except when a binding value is specified\n    var alreadyBound = domData.get(node, boundElementDomDataKey);\n    if (!sourceBindings) {\n        if (alreadyBound) {\n            onBindingError({\n                during: 'apply',\n                errorCaptured: new Error('You cannot apply bindings multiple times to the same element.'),\n                element: node,\n                bindingContext: bindingContext$$1\n            });\n            return false;\n        }\n        domData.set(node, boundElementDomDataKey, true);\n    }\n    // Optimization: Don't store the binding context on this node if it's definitely the same as on node.parentNode, because\n    // we can easily recover it just by scanning up the node's ancestors in the DOM\n    // (note: here, parent node means \"real DOM parent\" not \"virtual parent\", as there's no O(1) way to find the virtual parent)\n    if (!alreadyBound && bindingContextMayDifferFromDomParentElement) {\n        storedBindingContextForNode(node, bindingContext$$1);\n    }\n    // Use bindings if given, otherwise fall back on asking the bindings provider to give us some bindings\n    var bindings;\n    if (sourceBindings && typeof sourceBindings !== 'function') {\n        bindings = sourceBindings;\n    }\n    else {\n        var provider_1 = options.bindingProviderInstance;\n        var getBindings_1 = provider_1.getBindingAccessors || getBindingsAndMakeAccessors;\n        if (provider_1.FOR_NODE_TYPES.includes(node.nodeType)) {\n            // Get the binding from the provider within a computed observable so that we can update the bindings whenever\n            // the binding context is updated or if the binding provider accesses observables.\n            var bindingsUpdater = computed(function () {\n                bindings = sourceBindings ? sourceBindings(bindingContext$$1, node) : getBindings_1.call(provider_1, node, bindingContext$$1);\n                // Register a dependency on the binding context to support observable view models.\n                if (bindings && bindingContext$$1._subscribable) {\n                    bindingContext$$1._subscribable();\n                }\n                return bindings;\n            }, null, { disposeWhenNodeIsRemoved: node });\n            if (!bindings || !bindingsUpdater.isActive()) {\n                bindingsUpdater = null;\n            }\n        }\n    }\n    var bindingHandlerThatControlsDescendantBindings;\n    if (bindings) {\n        var allBindingHandlers = {};\n        domData.set(node, 'bindingHandlers', allBindingHandlers);\n        // Return the value accessor for a given binding. When bindings are static (won't be updated because of a binding\n        // context update), just return the value accessor from the binding. Otherwise, return a function that always gets\n        // the latest binding value and registers a dependency on the binding updater.\n        var getValueAccessor_1 = bindingsUpdater\n            ? function (bindingKey) { return function (optionalValue) {\n                var valueAccessor = bindingsUpdater()[bindingKey];\n                if (arguments.length === 0) {\n                    return evaluateValueAccessor(valueAccessor);\n                }\n                else {\n                    return valueAccessor(optionalValue);\n                }\n            }; } : function (bindingKey) { return bindings[bindingKey]; };\n        // Use of allBindings as a function is maintained for backwards compatibility, but its use is deprecated\n        function allBindings() {\n            return objectMap(bindingsUpdater ? bindingsUpdater() : bindings, evaluateValueAccessor);\n        }\n        // The following is the 3.x allBindings API\n        allBindings.has = function (key) { return key in bindings; };\n        allBindings.get = function (key) { return bindings[key] && evaluateValueAccessor(getValueAccessor_1(key)); };\n        var _loop_1 = function (key, BindingHandlerClass) {\n            // Go through the sorted bindings, calling init and update for each\n            function reportBindingError(during, errorCaptured) {\n                onBindingError({\n                    during: during,\n                    errorCaptured: errorCaptured,\n                    bindings: bindings,\n                    allBindings: allBindings,\n                    bindingKey: key,\n                    bindingContext: bindingContext$$1,\n                    element: node,\n                    valueAccessor: getValueAccessor_1(key)\n                });\n            }\n            if (node.nodeType === 8 && !BindingHandlerClass.allowVirtualElements) {\n                throw new Error(\"The binding [\" + key + \"] cannot be used with virtual elements\");\n            }\n            try {\n                var bindingHandler = dependencyDetection.ignore(function () {\n                    return new BindingHandlerClass({\n                        allBindings: allBindings,\n                        $element: node,\n                        $context: bindingContext$$1,\n                        onError: reportBindingError,\n                        valueAccessor: function () {\n                            var v = [];\n                            for (var _i = 0; _i < arguments.length; _i++) {\n                                v[_i] = arguments[_i];\n                            }\n                            return getValueAccessor_1(key).apply(void 0, v);\n                        }\n                    });\n                });\n                // Expose the bindings via domData.\n                allBindingHandlers[key] = bindingHandler;\n                if (bindingHandler.controlsDescendants) {\n                    if (bindingHandlerThatControlsDescendantBindings !== undefined) {\n                        throw new Error('Multiple bindings (' + bindingHandlerThatControlsDescendantBindings + ' and ' + key + ') are trying to control descendant bindings of the same element. You cannot use these bindings together on the same element.');\n                    }\n                    bindingHandlerThatControlsDescendantBindings = key;\n                }\n                if (bindingHandler.bindingCompleted instanceof options.Promise) {\n                    asyncBindingsApplied.add(bindingHandler.bindingCompleted);\n                }\n            }\n            catch (err) {\n                reportBindingError('creation', err);\n            }\n        };\n        for (var _i = 0, _a = topologicalSortBindings(bindings); _i < _a.length; _i++) {\n            var _b = _a[_i], key = _b[0], BindingHandlerClass = _b[1];\n            _loop_1(key, BindingHandlerClass);\n        }\n    }\n    return {\n        shouldBindDescendants: bindingHandlerThatControlsDescendantBindings === undefined\n    };\n}\nfunction getBindingContext(viewModelOrBindingContext) {\n    return viewModelOrBindingContext && (viewModelOrBindingContext instanceof bindingContext)\n        ? viewModelOrBindingContext\n        : new bindingContext(viewModelOrBindingContext);\n}\nfunction applyBindingAccessorsToNode(node, bindings, viewModelOrBindingContext, asyncBindingsApplied) {\n    if (node.nodeType === 1) {\n        virtualElements.normaliseVirtualElementDomStructure(node);\n    }\n    return applyBindingsToNodeInternal(node, bindings, getBindingContext(viewModelOrBindingContext), true, asyncBindingsApplied);\n}\nfunction applyBindingsToNode(node, bindings, viewModelOrBindingContext) {\n    var asyncBindingsApplied = new Set();\n    var context = getBindingContext(viewModelOrBindingContext);\n    applyBindingAccessorsToNode(node, makeBindingAccessors(bindings, context, node), context, asyncBindingsApplied);\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction applyBindingsToDescendants(viewModelOrBindingContext, rootNode) {\n    var asyncBindingsApplied = new Set();\n    if (rootNode.nodeType === 1 || rootNode.nodeType === 8) {\n        applyBindingsToDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n    }\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction applyBindings(viewModelOrBindingContext, rootNode) {\n    var asyncBindingsApplied = new Set();\n    // If jQuery is loaded after Knockout, we won't initially have access to it. So save it here.\n    if (!options.jQuery === undefined && options.jQuery) {\n        options.jQuery = options.jQuery;\n    }\n    if (rootNode && (rootNode.nodeType !== 1) && (rootNode.nodeType !== 8)) {\n        throw new Error('ko.applyBindings: first parameter should be your view model; second parameter should be a DOM node');\n    }\n    rootNode = rootNode || options.document.body; // Make \"rootNode\" parameter optional\n    applyBindingsToNodeAndDescendantsInternal(getBindingContext(viewModelOrBindingContext), rootNode, true, asyncBindingsApplied);\n    return options.Promise.all(asyncBindingsApplied);\n}\nfunction onBindingError(spec) {\n    var error;\n    if (spec.bindingKey) {\n        // During: 'init' or initial 'update'\n        error = spec.errorCaptured;\n        spec.message = 'Unable to process binding \"' + spec.bindingKey +\n            '\" in binding \"' + spec.bindingKey +\n            '\"\\nMessage: ' + (error.message ? error.message : error);\n    }\n    else {\n        // During: 'apply'\n        error = spec.errorCaptured;\n    }\n    try {\n        extend(error, spec);\n    }\n    catch (e) {\n        // Read-only error e.g. a DOMEXception.\n        spec.stack = error.stack;\n        error = new Error(error.message ? error.message : error);\n        extend(error, spec);\n    }\n    options.onError(error);\n}\n\n/* eslint no-cond-assign: 0 */\n// Objective:\n// * Given an input array, a container DOM node, and a function from array elements to arrays of DOM nodes,\n//   map the array elements to arrays of DOM nodes, concatenate together all these arrays, and use them to populate the container DOM node\n// * Next time we're given the same combination of things (with the array possibly having mutated), update the container DOM node\n//   so that its children is again the concatenation of the mappings of the array elements, but don't re-map any array elements that we\n//   previously mapped - retain those nodes, and just insert/delete other ones\n// \"callbackAfterAddingNodes\" will be invoked after any \"mapping\"-generated nodes are inserted into the container node\n// You can use this, for example, to activate bindings on those nodes.\nfunction mapNodeAndRefreshWhenChanged(containerNode, mapping, valueToMap, callbackAfterAddingNodes, index) {\n    // Map this array value inside a dependentObservable so we re-map when any dependency changes\n    var mappedNodes = [];\n    var dependentObservable = computed(function () {\n        var newMappedNodes = mapping(valueToMap, index, fixUpContinuousNodeArray(mappedNodes, containerNode)) || [];\n        // On subsequent evaluations, just replace the previously-inserted DOM nodes\n        if (mappedNodes.length > 0) {\n            replaceDomNodes(mappedNodes, newMappedNodes);\n            if (callbackAfterAddingNodes)\n                dependencyDetection.ignore(callbackAfterAddingNodes, null, [valueToMap, newMappedNodes, index]);\n        }\n        // Replace the contents of the mappedNodes array, thereby updating the record\n        // of which nodes would be deleted if valueToMap was itself later removed\n        mappedNodes.length = 0;\n        arrayPushAll(mappedNodes, newMappedNodes);\n    }, null, { disposeWhenNodeIsRemoved: containerNode, disposeWhen: function () { return !anyDomNodeIsAttachedToDocument(mappedNodes); } });\n    return { mappedNodes: mappedNodes, dependentObservable: (dependentObservable.isActive() ? dependentObservable : undefined) };\n}\nvar lastMappingResultDomDataKey = domData.nextKey();\nvar deletedItemDummyValue = domData.nextKey();\nfunction setDomNodeChildrenFromArrayMapping(domNode, array, mapping, options$$1, callbackAfterAddingNodes) {\n    // Compare the provided array against the previous one\n    array = array || [];\n    options$$1 = options$$1 || {};\n    var isFirstExecution = domData.get(domNode, lastMappingResultDomDataKey) === undefined;\n    var lastMappingResult = domData.get(domNode, lastMappingResultDomDataKey) || [];\n    var lastArray = arrayMap(lastMappingResult, function (x) { return x.arrayEntry; });\n    var editScript = compareArrays(lastArray, array, options$$1['dontLimitMoves']);\n    // Build the new mapping result\n    var newMappingResult = [];\n    var lastMappingResultIndex = 0;\n    var newMappingResultIndex = 0;\n    var nodesToDelete = [];\n    var itemsToProcess = [];\n    var itemsForBeforeRemoveCallbacks = [];\n    var itemsForMoveCallbacks = [];\n    var itemsForAfterAddCallbacks = [];\n    var mapData;\n    function itemMovedOrRetained(editScriptIndex, oldPosition) {\n        mapData = lastMappingResult[oldPosition];\n        if (newMappingResultIndex !== oldPosition)\n            itemsForMoveCallbacks[editScriptIndex] = mapData;\n        // Since updating the index might change the nodes, do so before calling fixUpContinuousNodeArray\n        mapData.indexObservable(newMappingResultIndex++);\n        fixUpContinuousNodeArray(mapData.mappedNodes, domNode);\n        newMappingResult.push(mapData);\n        itemsToProcess.push(mapData);\n    }\n    function callCallback(callback, items) {\n        if (callback) {\n            for (var i = 0, n = items.length; i < n; i++) {\n                if (items[i]) {\n                    arrayForEach(items[i].mappedNodes, function (node) {\n                        callback(node, i, items[i].arrayEntry);\n                    });\n                }\n            }\n        }\n    }\n    for (var i = 0, editScriptItem, movedIndex; editScriptItem = editScript[i]; i++) {\n        movedIndex = editScriptItem['moved'];\n        switch (editScriptItem['status']) {\n            case \"deleted\":\n                if (movedIndex === undefined) {\n                    mapData = lastMappingResult[lastMappingResultIndex];\n                    // Stop tracking changes to the mapping for these nodes\n                    if (mapData.dependentObservable) {\n                        mapData.dependentObservable.dispose();\n                        mapData.dependentObservable = undefined;\n                    }\n                    // Queue these nodes for later removal\n                    if (fixUpContinuousNodeArray(mapData.mappedNodes, domNode).length) {\n                        if (options$$1['beforeRemove']) {\n                            newMappingResult.push(mapData);\n                            itemsToProcess.push(mapData);\n                            if (mapData.arrayEntry === deletedItemDummyValue) {\n                                mapData = null;\n                            }\n                            else {\n                                itemsForBeforeRemoveCallbacks[i] = mapData;\n                            }\n                        }\n                        if (mapData) {\n                            nodesToDelete.push.apply(nodesToDelete, mapData.mappedNodes);\n                        }\n                    }\n                }\n                lastMappingResultIndex++;\n                break;\n            case \"retained\":\n                itemMovedOrRetained(i, lastMappingResultIndex++);\n                break;\n            case \"added\":\n                if (movedIndex !== undefined) {\n                    itemMovedOrRetained(i, movedIndex);\n                }\n                else {\n                    mapData = { arrayEntry: editScriptItem['value'], indexObservable: observable(newMappingResultIndex++) };\n                    newMappingResult.push(mapData);\n                    itemsToProcess.push(mapData);\n                    if (!isFirstExecution)\n                        itemsForAfterAddCallbacks[i] = mapData;\n                }\n                break;\n        }\n    }\n    // Store a copy of the array items we just considered so we can difference it next time\n    domData.set(domNode, lastMappingResultDomDataKey, newMappingResult);\n    // Call beforeMove first before any changes have been made to the DOM\n    callCallback(options$$1['beforeMove'], itemsForMoveCallbacks);\n    // Next remove nodes for deleted items (or just clean if there's a beforeRemove callback)\n    arrayForEach(nodesToDelete, options$$1['beforeRemove'] ? cleanNode : removeNode);\n    // Next add/reorder the remaining items (will include deleted items if there's a beforeRemove callback)\n    i = 0;\n    for (var nextNode = virtualElements.firstChild(domNode), lastNode, node; mapData = itemsToProcess[i]; i++) {\n        // Get nodes for newly added items\n        if (!mapData.mappedNodes)\n            extend(mapData, mapNodeAndRefreshWhenChanged(domNode, mapping, mapData.arrayEntry, callbackAfterAddingNodes, mapData.indexObservable));\n        // Put nodes in the right place if they aren't there already\n        for (var j = 0; node = mapData.mappedNodes[j]; nextNode = node.nextSibling, lastNode = node, j++) {\n            if (node !== nextNode)\n                virtualElements.insertAfter(domNode, node, lastNode);\n        }\n        // Run the callbacks for newly added nodes (for example, to apply bindings, etc.)\n        if (!mapData.initialized && callbackAfterAddingNodes) {\n            callbackAfterAddingNodes(mapData.arrayEntry, mapData.mappedNodes, mapData.indexObservable);\n            mapData.initialized = true;\n        }\n    }\n    // If there's a beforeRemove callback, call it after reordering.\n    // Note that we assume that the beforeRemove callback will usually be used to remove the nodes using\n    // some sort of animation, which is why we first reorder the nodes that will be removed. If the\n    // callback instead removes the nodes right away, it would be more efficient to skip reordering them.\n    // Perhaps we'll make that change in the future if this scenario becomes more common.\n    callCallback(options$$1['beforeRemove'], itemsForBeforeRemoveCallbacks);\n    // Replace the stored values of deleted items with a dummy value. This provides two benefits: it marks this item\n    // as already \"removed\" so we won't call beforeRemove for it again, and it ensures that the item won't match up\n    // with an actual item in the array and appear as \"retained\" or \"moved\".\n    for (i = 0; i < itemsForBeforeRemoveCallbacks.length; ++i) {\n        if (itemsForBeforeRemoveCallbacks[i]) {\n            itemsForBeforeRemoveCallbacks[i].arrayEntry = deletedItemDummyValue;\n        }\n    }\n    // Finally call afterMove and afterAdd callbacks\n    callCallback(options$$1['afterMove'], itemsForMoveCallbacks);\n    callCallback(options$$1['afterAdd'], itemsForAfterAddCallbacks);\n}\n\nexport { BindingHandler, AsyncBindingHandler, bindingContext, storedBindingContextForNode, contextFor, dataFor, getBindingHandler, applyBindingAccessorsToNode, applyBindingsToNode, applyBindingsToDescendants, applyBindings, setDomNodeChildrenFromArrayMapping };\n//# sourceMappingURL=tko.bind.js.map\n","import { dependencyDetection, isObservable, observable, peek, unwrap } from 'tko.observable';\nimport { arrayFilter, domData, domNodeIsAttachedToDocument, extend, fixUpContinuousNodeArray, ieVersion, makeArray, memoization, moveCleanedNodesToContainerElement, options, parseHtmlFragment, replaceDomNodes, setHtml, tagNameLower, virtualElements } from 'tko.utils';\nimport { AsyncBindingHandler, applyBindings, bindingContext, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\nimport { computed } from 'tko.computed';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// A template source represents a read/write way of accessing a template. This is to eliminate the need for template loading/saving\n// logic to be duplicated in every template engine (and means they can all work with anonymous templates, etc.)\n//\n// Two are provided by default:\n//  1. ko.templateSources.domElement       - reads/writes the text content of an arbitrary DOM element\n//  2. ko.templateSources.anonymousElement - uses ko.utils.domData to read/write text *associated* with the DOM element, but\n//                                           without reading/writing the actual element text content, since it will be overwritten\n//                                           with the rendered template output.\n// You can implement your own template source if you want to fetch/store templates somewhere other than in DOM elements.\n// Template sources need to have the following functions:\n//   text() \t\t\t- returns the template text from your storage location\n//   text(value)\t\t- writes the supplied template text to your storage location\n//   data(key)\t\t\t- reads values stored using data(key, value) - see below\n//   data(key, value)\t- associates \"value\" with this template and the key \"key\". Is used to store information like \"isRewritten\".\n//\n// Optionally, template sources can also have the following functions:\n//   nodes()            - returns a DOM element containing the nodes of this template, where available\n//   nodes(value)       - writes the given DOM element to your storage location\n// If a DOM element is available for a given template source, template engines are encouraged to use it in preference over text()\n// for improved speed. However, all templateSources must supply text() even if they don't supply nodes().\n//\n// Once you've implemented a templateSource, make your template engine use it by subclassing whatever template engine you were\n// using and overriding \"makeTemplateSource\" to return an instance of your custom template source.\n// ---- ko.templateSources.domElement -----\n// template types\nvar templateScript = 1;\nvar templateTextArea = 2;\nvar templateTemplate = 3;\nvar templateElement = 4;\nfunction domElement(element) {\n    this.domElement = element;\n    if (!element) {\n        return;\n    }\n    var tagNameLower$$1 = tagNameLower(element);\n    this.templateType =\n        tagNameLower$$1 === \"script\" ? templateScript :\n            tagNameLower$$1 === \"textarea\" ? templateTextArea :\n                // For browsers with proper <template> element support, where the .content property gives a document fragment\n                tagNameLower$$1 == \"template\" && element.content && element.content.nodeType === 11 ? templateTemplate :\n                    templateElement;\n}\ndomElement.prototype.text = function () {\n    var elemContentsProperty = this.templateType === templateScript ? \"text\"\n        : this.templateType === templateTextArea ? \"value\"\n            : \"innerHTML\";\n    if (arguments.length == 0) {\n        return this.domElement[elemContentsProperty];\n    }\n    else {\n        var valueToWrite = arguments[0];\n        if (elemContentsProperty === \"innerHTML\")\n            setHtml(this.domElement, valueToWrite);\n        else\n            this.domElement[elemContentsProperty] = valueToWrite;\n    }\n};\nvar dataDomDataPrefix = domData.nextKey() + \"_\";\ndomElement.prototype.data = function (key /*, valueToWrite */) {\n    if (arguments.length === 1) {\n        return domData.get(this.domElement, dataDomDataPrefix + key);\n    }\n    else {\n        domData.set(this.domElement, dataDomDataPrefix + key, arguments[1]);\n    }\n};\nvar templatesDomDataKey = domData.nextKey();\nfunction getTemplateDomData(element) {\n    return domData.get(element, templatesDomDataKey) || {};\n}\nfunction setTemplateDomData(element, data) {\n    domData.set(element, templatesDomDataKey, data);\n}\ndomElement.prototype.nodes = function () {\n    var element = this.domElement;\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(element), containerData = templateData.containerData;\n        return containerData || (this.templateType === templateTemplate ? element.content :\n            this.templateType === templateElement ? element :\n                undefined);\n    }\n    else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(element, { containerData: valueToWrite });\n    }\n};\n// ---- ko.templateSources.anonymousTemplate -----\n// Anonymous templates are normally saved/retrieved as DOM nodes through \"nodes\".\n// For compatibility, you can also read \"text\"; it will be serialized from the nodes on demand.\n// Writing to \"text\" is still supported, but then the template data will not be available as DOM nodes.\nfunction anonymousTemplate(element) {\n    this.domElement = element;\n}\nanonymousTemplate.prototype = new domElement();\nanonymousTemplate.prototype.constructor = anonymousTemplate;\nanonymousTemplate.prototype.text = function () {\n    if (arguments.length == 0) {\n        var templateData = getTemplateDomData(this.domElement);\n        if (templateData.textData === undefined && templateData.containerData)\n            templateData.textData = templateData.containerData.innerHTML;\n        return templateData.textData;\n    }\n    else {\n        var valueToWrite = arguments[0];\n        setTemplateDomData(this.domElement, { textData: valueToWrite });\n    }\n};\n\n// If you want to make a custom template engine,\n//\n// [1] Inherit from this class (like ko.nativeTemplateEngine does)\n// [2] Override 'renderTemplateSource', supplying a function with this signature:\n//\n//        function (templateSource, bindingContext, options) {\n//            // - templateSource.text() is the text of the template you should render\n//            // - bindingContext.$data is the data you should pass into the template\n//            //   - you might also want to make bindingContext.$parent, bindingContext.$parents,\n//            //     and bindingContext.$root available in the template too\n//            // - options gives you access to any other properties set on \"data-bind: { template: options }\"\n//            // - templateDocument is the document object of the template\n//            //\n//            // Return value: an array of DOM nodes\n//        }\n//\n// [3] Override 'createJavaScriptEvaluatorBlock', supplying a function with this signature:\n//\n//        function (script) {\n//            // Return value: Whatever syntax means \"Evaluate the JavaScript statement 'script' and output the result\"\n//            //               For example, the jquery.tmpl template engine converts 'someScript' to '${ someScript }'\n//        }\n//\n//     This is only necessary if you want to allow data-bind attributes to reference arbitrary template variables.\n//     If you don't want to allow that, you can set the property 'allowTemplateRewriting' to false (like ko.nativeTemplateEngine does)\n//     and then you don't need to override 'createJavaScriptEvaluatorBlock'.\nfunction templateEngine() { }\n\nextend(templateEngine.prototype, {\n    renderTemplateSource: function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n        options$$1.onError(\"Override renderTemplateSource\");\n    },\n    createJavaScriptEvaluatorBlock: function (script) {\n        options.onError(\"Override createJavaScriptEvaluatorBlock\");\n    },\n    makeTemplateSource: function (template, templateDocument) {\n        // Named template\n        if (typeof template == \"string\") {\n            templateDocument = templateDocument || document;\n            var elem = templateDocument.getElementById(template);\n            if (!elem)\n                options.onError(\"Cannot find template with ID \" + template);\n            return new domElement(elem);\n        }\n        else if ((template.nodeType == 1) || (template.nodeType == 8)) {\n            // Anonymous template\n            return new anonymousTemplate(template);\n        }\n        else\n            options.onError(\"Unknown template type: \" + template);\n    },\n    renderTemplate: function (template, bindingContext$$1, options$$1, templateDocument) {\n        var templateSource = this['makeTemplateSource'](template, templateDocument);\n        return this.renderTemplateSource(templateSource, bindingContext$$1, options$$1, templateDocument);\n    }\n});\n\nvar _templateEngine;\nfunction setTemplateEngine(tEngine) {\n    if ((tEngine !== undefined) && !(tEngine instanceof templateEngine)) {\n        // TODO: ko.templateEngine to appropriate name\n        throw new Error('templateEngine must inherit from ko.templateEngine');\n    }\n    _templateEngine = tEngine;\n}\nfunction invokeForEachNodeInContinuousRange(firstNode, lastNode, action) {\n    var node;\n    var nextInQueue = firstNode;\n    var firstOutOfRangeNode = virtualElements.nextSibling(lastNode);\n    while (nextInQueue && ((node = nextInQueue) !== firstOutOfRangeNode)) {\n        nextInQueue = virtualElements.nextSibling(node);\n        action(node, nextInQueue);\n    }\n}\nfunction activateBindingsOnContinuousNodeArray(continuousNodeArray, bindingContext$$1, afterBindingCallback) {\n    // To be used on any nodes that have been rendered by a template and have been inserted into some parent element\n    // Walks through continuousNodeArray (which *must* be continuous, i.e., an uninterrupted sequence of sibling nodes, because\n    // the algorithm for walking them relies on this), and for each top-level item in the virtual-element sense,\n    // (1) Does a regular \"applyBindings\" to associate bindingContext with this node and to activate any non-memoized bindings\n    // (2) Unmemoizes any memos in the DOM subtree (e.g., to activate bindings that had been memoized during template rewriting)\n    if (continuousNodeArray.length) {\n        var firstNode = continuousNodeArray[0];\n        var lastNode = continuousNodeArray[continuousNodeArray.length - 1];\n        var parentNode = firstNode.parentNode;\n        var provider = options.bindingProviderInstance;\n        var preprocessNode = provider.preprocessNode;\n        if (preprocessNode) {\n            invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node, nextNodeInRange) {\n                var nodePreviousSibling = node.previousSibling;\n                var newNodes = preprocessNode.call(provider, node);\n                if (newNodes) {\n                    if (node === firstNode) {\n                        firstNode = newNodes[0] || nextNodeInRange;\n                    }\n                    if (node === lastNode) {\n                        lastNode = newNodes[newNodes.length - 1] || nodePreviousSibling;\n                    }\n                }\n            });\n            // Because preprocessNode can change the nodes, including the first and last nodes, update continuousNodeArray to match.\n            // We need the full set, including inner nodes, because the unmemoize step might remove the first node (and so the real\n            // first node needs to be in the array).\n            continuousNodeArray.length = 0;\n            if (!firstNode) {\n                return;\n            }\n            if (firstNode === lastNode) {\n                continuousNodeArray.push(firstNode);\n            }\n            else {\n                continuousNodeArray.push(firstNode, lastNode);\n                fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n            }\n        }\n        // Need to applyBindings *before* unmemoziation, because unmemoization might introduce extra nodes (that we don't want to re-bind)\n        // whereas a regular applyBindings won't introduce new memoized nodes\n        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n            if (node.nodeType === 1 || node.nodeType === 8) {\n                applyBindings(bindingContext$$1, node).then(afterBindingCallback);\n            }\n        });\n        invokeForEachNodeInContinuousRange(firstNode, lastNode, function (node) {\n            if (node.nodeType === 1 || node.nodeType === 8) {\n                memoization.unmemoizeDomNodeAndDescendants(node, [bindingContext$$1]);\n            }\n        });\n        // Make sure any changes done by applyBindings or unmemoize are reflected in the array\n        fixUpContinuousNodeArray(continuousNodeArray, parentNode);\n    }\n}\nfunction getFirstNodeFromPossibleArray(nodeOrNodeArray) {\n    return nodeOrNodeArray.nodeType ? nodeOrNodeArray\n        : nodeOrNodeArray.length > 0 ? nodeOrNodeArray[0]\n            : null;\n}\nfunction executeTemplate(targetNodeOrNodeArray, renderMode, template, bindingContext$$1, options$$1, afterBindingCallback) {\n    options$$1 = options$$1 || {};\n    var firstTargetNode = targetNodeOrNodeArray && getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n    var templateDocument = (firstTargetNode || template || {}).ownerDocument;\n    var templateEngineToUse = (options$$1.templateEngine || _templateEngine);\n    var renderedNodesArray = templateEngineToUse.renderTemplate(template, bindingContext$$1, options$$1, templateDocument);\n    // Loosely check result is an array of DOM nodes\n    if ((typeof renderedNodesArray.length !== 'number') || (renderedNodesArray.length > 0 && typeof renderedNodesArray[0].nodeType !== 'number')) {\n        throw new Error('Template engine must return an array of DOM nodes');\n    }\n    var haveAddedNodesToParent = false;\n    switch (renderMode) {\n        case 'replaceChildren':\n            virtualElements.setDomNodeChildren(targetNodeOrNodeArray, renderedNodesArray);\n            haveAddedNodesToParent = true;\n            break;\n        case 'replaceNode':\n            replaceDomNodes(targetNodeOrNodeArray, renderedNodesArray);\n            haveAddedNodesToParent = true;\n            break;\n        case 'ignoreTargetNode': break;\n        default:\n            throw new Error('Unknown renderMode: ' + renderMode);\n    }\n    if (haveAddedNodesToParent) {\n        activateBindingsOnContinuousNodeArray(renderedNodesArray, bindingContext$$1, afterBindingCallback);\n        if (options$$1.afterRender) {\n            dependencyDetection.ignore(options$$1.afterRender, null, [renderedNodesArray, bindingContext$$1['$data']]);\n        }\n    }\n    return renderedNodesArray;\n}\nfunction resolveTemplateName(template, data, context) {\n    // The template can be specified as:\n    if (isObservable(template)) {\n        // 1. An observable, with string value\n        return template();\n    }\n    else if (typeof template === 'function') {\n        // 2. A function of (data, context) returning a string\n        return template(data, context);\n    }\n    else {\n        // 3. A string\n        return template;\n    }\n}\nfunction renderTemplate(template, dataOrBindingContext, options$$1, targetNodeOrNodeArray, renderMode, afterBindingCallback) {\n    options$$1 = options$$1 || {};\n    if ((options$$1.templateEngine || _templateEngine) === undefined) {\n        throw new Error('Set a template engine before calling renderTemplate');\n    }\n    renderMode = renderMode || 'replaceChildren';\n    if (targetNodeOrNodeArray) {\n        var firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n        var whenToDispose = function () { return (!firstTargetNode) || !domNodeIsAttachedToDocument(firstTargetNode); }; // Passive disposal (on next evaluation)\n        var activelyDisposeWhenNodeIsRemoved = (firstTargetNode && renderMode === 'replaceNode') ? firstTargetNode.parentNode : firstTargetNode;\n        return computed(// So the DOM is automatically updated when any dependency changes\n        function () {\n            // Ensure we've got a proper binding context to work with\n            var bindingContext$$1 = (dataOrBindingContext && (dataOrBindingContext instanceof bindingContext))\n                ? dataOrBindingContext\n                : new bindingContext(dataOrBindingContext, null, null, null, { 'exportDependencies': true });\n            var templateName = resolveTemplateName(template, bindingContext$$1.$data, bindingContext$$1);\n            var renderedNodesArray = executeTemplate(targetNodeOrNodeArray, renderMode, templateName, bindingContext$$1, options$$1, afterBindingCallback);\n            if (renderMode === 'replaceNode') {\n                targetNodeOrNodeArray = renderedNodesArray;\n                firstTargetNode = getFirstNodeFromPossibleArray(targetNodeOrNodeArray);\n            }\n        }, null, { disposeWhen: whenToDispose, disposeWhenNodeIsRemoved: activelyDisposeWhenNodeIsRemoved });\n    }\n    else {\n        // We don't yet have a DOM node to evaluate, so use a memo and render the template later when there is a DOM node\n        return memoization.memoize(function (domNode) {\n            renderTemplate(template, dataOrBindingContext, options$$1, domNode, 'replaceNode');\n        });\n    }\n}\nfunction renderTemplateForEach(template, arrayOrObservableArray, options$$1, targetNode, parentBindingContext, afterBindingCallback) {\n    // Since setDomNodeChildrenFromArrayMapping always calls executeTemplateForArrayItem and then\n    // activateBindingsCallback for added items, we can store the binding context in the former to use in the latter.\n    var arrayItemContext;\n    // This will be called by setDomNodeChildrenFromArrayMapping to get the nodes to add to targetNode\n    function executeTemplateForArrayItem(arrayValue, index) {\n        // Support selecting template as a function of the data being rendered\n        arrayItemContext = parentBindingContext['createChildContext'](arrayValue, options$$1['as'], function (context) {\n            context['$index'] = index;\n        });\n        var templateName = resolveTemplateName(template, arrayValue, arrayItemContext);\n        return executeTemplate(null, 'ignoreTargetNode', templateName, arrayItemContext, options$$1, afterBindingCallback);\n    }\n    // This will be called whenever setDomNodeChildrenFromArrayMapping has added nodes to targetNode\n    var activateBindingsCallback = function (arrayValue, addedNodesArray /*, index */) {\n        activateBindingsOnContinuousNodeArray(addedNodesArray, arrayItemContext, afterBindingCallback);\n        if (options$$1['afterRender']) {\n            options$$1['afterRender'](addedNodesArray, arrayValue);\n        }\n        // release the \"cache\" variable, so that it can be collected by\n        // the GC when its value isn't used from within the bindings anymore.\n        arrayItemContext = null;\n    };\n    return computed(function () {\n        var unwrappedArray = unwrap(arrayOrObservableArray) || [];\n        if (typeof unwrappedArray.length !== 'number') {\n            unwrappedArray = [unwrappedArray];\n        }\n        // Filter out any entries marked as destroyed\n        var filteredArray = arrayFilter(unwrappedArray, function (item) {\n            return options$$1['includeDestroyed'] || item === undefined || item === null || !unwrap(item['_destroy']);\n        });\n        // Call setDomNodeChildrenFromArrayMapping, ignoring any observables unwrapped within (most likely from a callback function).\n        // If the array items are observables, though, they will be unwrapped in executeTemplateForArrayItem and managed within setDomNodeChildrenFromArrayMapping.\n        dependencyDetection.ignore(setDomNodeChildrenFromArrayMapping, null, [targetNode, filteredArray, executeTemplateForArrayItem, options$$1, activateBindingsCallback]);\n    }, null, { disposeWhenNodeIsRemoved: targetNode });\n}\nvar templateComputedDomDataKey = domData.nextKey();\nvar TemplateBindingHandler = /** @class */ (function (_super) {\n    __extends(TemplateBindingHandler, _super);\n    function TemplateBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        var element = _this.$element;\n        var bindingValue = unwrap(_this.value);\n        var container;\n        // Expose 'conditional' for `else` chaining.\n        domData.set(element, 'conditional', {\n            elseChainSatisfied: observable(true)\n        });\n        // Support anonymous templates\n        if (typeof bindingValue === 'string' || bindingValue.name) {\n            // It's a named template - clear the element\n            virtualElements.emptyNode(element);\n        }\n        else if ('nodes' in bindingValue) {\n            // We've been given an array of DOM nodes. Save them as the template source.\n            // There is no known use case for the node array being an observable array (if the output\n            // varies, put that behavior *into* your template - that's what templates are for), and\n            // the implementation would be a mess, so assert that it's not observable.\n            var nodes = bindingValue.nodes || [];\n            if (isObservable(nodes)) {\n                throw new Error('The \"nodes\" option must be a plain, non-observable array.');\n            }\n            container = moveCleanedNodesToContainerElement(nodes); // This also removes the nodes from their current parent\n            new anonymousTemplate(element)['nodes'](container);\n        }\n        else {\n            // It's an anonymous template - store the element contents, then clear the element\n            var templateNodes = virtualElements.childNodes(element);\n            container = moveCleanedNodesToContainerElement(templateNodes); // This also removes the nodes from their current parent\n            new anonymousTemplate(element).nodes(container);\n        }\n        _this.computed(_this.onValueChange.bind(_this));\n        return _this;\n    }\n    TemplateBindingHandler.prototype.onValueChange = function () {\n        var element = this.$element;\n        var bindingContext$$1 = this.$context;\n        var value = this.value;\n        var options$$1 = unwrap(value);\n        var shouldDisplay = true;\n        var templateComputed = null;\n        var elseChainSatisfied = domData.get(element, 'conditional').elseChainSatisfied;\n        var templateName;\n        if (typeof options$$1 === 'string') {\n            templateName = value;\n            options$$1 = {};\n        }\n        else {\n            templateName = options$$1.name;\n            // Support \"if\"/\"ifnot\" conditions\n            if ('if' in options$$1) {\n                shouldDisplay = unwrap(options$$1[\"if\"]);\n            }\n            if (shouldDisplay && 'ifnot' in options$$1) {\n                shouldDisplay = !unwrap(options$$1.ifnot);\n            }\n        }\n        if ('foreach' in options$$1) {\n            // Render once for each data point (treating data set as empty if shouldDisplay==false)\n            var dataArray = (shouldDisplay && options$$1.foreach) || [];\n            templateComputed = renderTemplateForEach(templateName || element, dataArray, options$$1, element, bindingContext$$1, this.completeBinding);\n            elseChainSatisfied((unwrap(dataArray) || []).length !== 0);\n        }\n        else if (shouldDisplay) {\n            // Render once for this single data point (or use the viewModel if no data was provided)\n            var innerBindingContext = ('data' in options$$1)\n                ? bindingContext$$1.createStaticChildContext(options$$1.data, options$$1.as) // Given an explitit 'data' value, we create a child binding context for it\n                : bindingContext$$1; // Given no explicit 'data' value, we retain the same binding context\n            templateComputed = renderTemplate(templateName || element, innerBindingContext, options$$1, element, undefined, this.completeBinding);\n            elseChainSatisfied(true);\n        }\n        else {\n            virtualElements.emptyNode(element);\n            elseChainSatisfied(false);\n        }\n        // It only makes sense to have a single template computed per element (otherwise which one should have its output displayed?)\n        this.disposeOldComputedAndStoreNewOne(element, templateComputed);\n    };\n    TemplateBindingHandler.prototype.disposeOldComputedAndStoreNewOne = function (element, newComputed) {\n        var oldComputed = domData.get(element, templateComputedDomDataKey);\n        if (oldComputed && (typeof oldComputed.dispose === 'function')) {\n            oldComputed.dispose();\n        }\n        domData.set(element, templateComputedDomDataKey, (newComputed && newComputed.isActive()) ? newComputed : undefined);\n    };\n    Object.defineProperty(TemplateBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(TemplateBindingHandler, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return TemplateBindingHandler;\n}(AsyncBindingHandler));\n\nfunction nativeTemplateEngine() {\n}\nnativeTemplateEngine.prototype = new templateEngine();\nnativeTemplateEngine.prototype.constructor = nativeTemplateEngine;\nnativeTemplateEngine.prototype.renderTemplateSource = function (templateSource, bindingContext$$1, options$$1, templateDocument) {\n    var useNodesIfAvailable = !(ieVersion < 9), // IE<9 cloneNode doesn't work properly\n    templateNodesFunc = useNodesIfAvailable ? templateSource.nodes : null, templateNodes = templateNodesFunc ? templateSource.nodes() : null;\n    if (templateNodes) {\n        return makeArray(templateNodes.cloneNode(true).childNodes);\n    }\n    else {\n        var templateText = templateSource.text();\n        return parseHtmlFragment(templateText, templateDocument);\n    }\n};\nnativeTemplateEngine.instance = new nativeTemplateEngine();\nsetTemplateEngine(nativeTemplateEngine.instance);\n\n// \"foreach: someExpression\" is equivalent to \"template: { foreach: someExpression }\"\n// \"foreach: { data: someExpression, afterAdd: myfn }\" is equivalent to \"template: { foreach: someExpression, afterAdd: myfn }\"\nvar TemplateForEachBindingHandler = /** @class */ (function (_super) {\n    __extends(TemplateForEachBindingHandler, _super);\n    function TemplateForEachBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(TemplateForEachBindingHandler.prototype, \"value\", {\n        get: function () {\n            var modelValue = this.valueAccessor();\n            var unwrappedValue = peek(modelValue); // Unwrap without setting a dependency here\n            // If unwrappedValue is the array, pass in the wrapped value on its own\n            // The value will be unwrapped and tracked within the template binding\n            // (See https://github.com/SteveSanderson/knockout/issues/523)\n            if (!unwrappedValue || typeof unwrappedValue.length === 'number') {\n                return { foreach: modelValue, templateEngine: nativeTemplateEngine.instance };\n            }\n            // If unwrappedValue.data is the array, preserve all relevant options and unwrap again value so we get updates\n            unwrap(modelValue);\n            return {\n                foreach: unwrappedValue.data,\n                as: unwrappedValue.as,\n                includeDestroyed: unwrappedValue.includeDestroyed,\n                afterAdd: unwrappedValue.afterAdd,\n                beforeRemove: unwrappedValue.beforeRemove,\n                afterRender: unwrappedValue.afterRender,\n                beforeMove: unwrappedValue.beforeMove,\n                afterMove: unwrappedValue.afterMove,\n                templateEngine: nativeTemplateEngine.instance\n            };\n        },\n        enumerable: true,\n        configurable: true\n    });\n    return TemplateForEachBindingHandler;\n}(TemplateBindingHandler));\n\n//    'let': letBinding,\n//    template: template,\nvar bindings = {\n    foreach: TemplateForEachBindingHandler,\n    template: TemplateBindingHandler\n};\n\nexport { bindings, nativeTemplateEngine, templateEngine, setTemplateEngine, renderTemplate, TemplateBindingHandler, domElement, anonymousTemplate };\n//# sourceMappingURL=tko.binding.template.js.map\n","import { cleanNode, cloneNodes, domData, virtualElements } from 'tko.utils';\nimport { dependencyDetection, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n/**\n * Test a node for whether it represents an \"else\" condition.\n * @param  {HTMLElement}  node to be tested\n * @return {Boolean}      true when\n *\n * Matches <!-- else -->\n */\nfunction isElseNode(node) {\n    return node.nodeType === 8 &&\n        node.nodeValue.trim().toLowerCase() === 'else';\n}\nfunction detectElse(element) {\n    var children = virtualElements.childNodes(element);\n    for (var i = 0, j = children.length; i < j; ++i) {\n        if (isElseNode(children[i])) {\n            return true;\n        }\n    }\n    return false;\n}\n/**\n * Clone the nodes, returning `ifNodes`, `elseNodes`\n * @param  {HTMLElement} element The nodes to be cloned\n * @param  {boolean}    hasElse short-circuit to speed up the inner-loop.\n * @return {object}         Containing the cloned nodes.\n */\nfunction cloneIfElseNodes(element, hasElse) {\n    var children = virtualElements.childNodes(element);\n    var ifNodes = [];\n    var elseNodes = [];\n    var target = ifNodes;\n    for (var i = 0, j = children.length; i < j; ++i) {\n        if (hasElse && isElseNode(children[i])) {\n            target = elseNodes;\n            hasElse = false;\n        }\n        else {\n            target.push(cleanNode(children[i].cloneNode(true)));\n        }\n    }\n    return { ifNodes: ifNodes, elseNodes: elseNodes };\n}\n/**\n * Create a DOMbinding that controls DOM nodes presence\n *\n * Covers e.g.\n *\n * 1. DOM Nodes contents\n *\n * <div data-bind='if: x'>\n * <!-- else --> ... an optional \"if\"\n * </div>\n *\n * 2. Virtual elements\n *\n * <!-- ko if: x -->\n * <!-- else -->\n * <!-- /ko -->\n *\n * 3. Else binding\n * <div data-bind='if: x'></div>\n * <div data-bind='else'></div>\n */\nvar ConditionalBindingHandler = /** @class */ (function (_super) {\n    __extends(ConditionalBindingHandler, _super);\n    function ConditionalBindingHandler(params) {\n        var _this = _super.call(this, params) || this;\n        _this.hasElse = detectElse(_this.$element);\n        var elseChainSatisfied = _this.completesElseChain = observable();\n        domData.set(_this.$element, 'conditional', { elseChainSatisfied: elseChainSatisfied });\n        _this.computed(_this.render.bind(_this));\n        return _this;\n    }\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"elseChainIsAlreadySatisfied\", {\n        get: function () { return false; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"needsRefresh\", {\n        get: function () {\n            return this.isFirstRender || this.shouldDisplayIf !== this.didDisplayOnLastUpdate;\n        },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return !!unwrap(this.value); },\n        enumerable: true,\n        configurable: true\n    });\n    ConditionalBindingHandler.prototype.getIfElseNodes = function () {\n        if (this.ifElseNodes) {\n            return this.ifElseNodes;\n        }\n        if (dependencyDetection.getDependenciesCount() || this.hasElse) {\n            return cloneIfElseNodes(this.$element, this.hasElse);\n        }\n    };\n    ConditionalBindingHandler.prototype.render = function () {\n        // Create any dependencies on values created in value-functions.\n        if (typeof this.value === 'function') {\n            this.value();\n        }\n        var isFirstRender = !this.ifElseNodes;\n        var shouldDisplayIf = this.shouldDisplayIf;\n        var needsRefresh = this.needsRefresh;\n        if (this.elseChainIsAlreadySatisfied) {\n            shouldDisplayIf = false;\n            needsRefresh = isFirstRender || this.didDisplayOnLastUpdate;\n            this.completesElseChain(true);\n        }\n        else {\n            this.completesElseChain(this.shouldDisplayIf);\n        }\n        if (!needsRefresh) {\n            return;\n        }\n        this.ifElseNodes = this.getIfElseNodes();\n        if (shouldDisplayIf) {\n            if (!isFirstRender || this.hasElse) {\n                virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.ifNodes));\n            }\n        }\n        else if (this.ifElseNodes) {\n            virtualElements.setDomNodeChildren(this.$element, cloneNodes(this.ifElseNodes.elseNodes));\n        }\n        else {\n            virtualElements.emptyNode(this.$element);\n        }\n        applyBindingsToDescendants(this.bindingContext, this.$element)\n            .then(this.completeBinding);\n        this.didDisplayOnLastUpdate = shouldDisplayIf;\n    };\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"bindingContext\", {\n        get: function () { return this.$context; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ConditionalBindingHandler, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return ConditionalBindingHandler;\n}(AsyncBindingHandler));\nvar IfBindingHandler = /** @class */ (function (_super) {\n    __extends(IfBindingHandler, _super);\n    function IfBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    return IfBindingHandler;\n}(ConditionalBindingHandler));\nvar UnlessBindingHandler = /** @class */ (function (_super) {\n    __extends(UnlessBindingHandler, _super);\n    function UnlessBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(UnlessBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return !_super.prototype.shouldDisplayIf; },\n        enumerable: true,\n        configurable: true\n    });\n    return UnlessBindingHandler;\n}(ConditionalBindingHandler));\nvar ElseBindingHandler = /** @class */ (function (_super) {\n    __extends(ElseBindingHandler, _super);\n    function ElseBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(ElseBindingHandler.prototype, \"shouldDisplayIf\", {\n        get: function () { return _super.prototype.shouldDisplayIf || this.value === undefined; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ElseBindingHandler.prototype, \"elseChainIsAlreadySatisfied\", {\n        /**\n         * Return any conditional that precedes the given node.\n         * @return {object}      { elseChainSatisfied: observable }\n         */\n        get: function () {\n            if (!this._elseChain) {\n                this._elseChain = this.readElseChain();\n            }\n            return unwrap(this._elseChain.elseChainSatisfied);\n        },\n        enumerable: true,\n        configurable: true\n    });\n    ElseBindingHandler.prototype.readElseChain = function () {\n        var node = this.$element;\n        do {\n            node = node.previousSibling;\n        } while (node && node.nodeType !== 1 && node.nodeType !== 8);\n        if (!node) {\n            return false;\n        }\n        if (node.nodeType === 8) {\n            node = virtualElements.previousSibling(node);\n        }\n        return domData.get(node, 'conditional') || {};\n    };\n    return ElseBindingHandler;\n}(ConditionalBindingHandler));\nvar WithBindingHandler = /** @class */ (function (_super) {\n    __extends(WithBindingHandler, _super);\n    function WithBindingHandler() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    Object.defineProperty(WithBindingHandler.prototype, \"needsRefresh\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(WithBindingHandler.prototype, \"bindingContext\", {\n        get: function () {\n            return this.$context.createStaticChildContext(this.value);\n        },\n        enumerable: true,\n        configurable: true\n    });\n    return WithBindingHandler;\n}(ConditionalBindingHandler));\n\nvar bindings = {\n    'if': IfBindingHandler,\n    'with': WithBindingHandler,\n    ifnot: UnlessBindingHandler,\n    unless: UnlessBindingHandler,\n    'else': ElseBindingHandler,\n    'elseif': ElseBindingHandler\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.if.js.map\n","import { arrayForEach, cleanNode, createSymbolOrString, domData, domNodeIsContainedBy, options, virtualElements } from 'tko.utils';\nimport { isObservable, observable, unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants, contextFor } from 'tko.bind';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n// index.js\n// --------\n// Fast For Each\n//\n// Employing sound techniques to make a faster Knockout foreach binding.\n// --------\n//      Utilities\nvar MAX_LIST_SIZE = 9007199254740991;\n// from https://github.com/jonschlinkert/is-plain-object\nfunction isPlainObject(o) {\n    return !!o && typeof o === 'object' && o.constructor === Object;\n}\nvar supportsDocumentFragment = options.document && typeof options.document.createDocumentFragment === 'function';\n// Get a copy of the (possibly virtual) child nodes of the given element,\n// put them into a container, then empty the given node.\nfunction makeTemplateNode(sourceNode) {\n    var container = document.createElement('div');\n    var parentNode;\n    if (sourceNode.content) {\n        // For e.g. <template> tags\n        parentNode = sourceNode.content;\n    }\n    else if (sourceNode.tagName === 'SCRIPT') {\n        parentNode = document.createElement('div');\n        parentNode.innerHTML = sourceNode.text;\n    }\n    else {\n        // Anything else e.g. <div>\n        parentNode = sourceNode;\n    }\n    arrayForEach(virtualElements.childNodes(parentNode), function (child) {\n        // FIXME - This cloneNode could be expensive; we may prefer to iterate over the\n        // parentNode children in reverse (so as not to foul the indexes as childNodes are\n        // removed from parentNode when inserted into the container)\n        if (child) {\n            container.insertBefore(child.cloneNode(true), null);\n        }\n    });\n    return container;\n}\n// Mimic a KO change item 'add'\nfunction valueToChangeAddItem(value, index) {\n    return {\n        status: 'added',\n        value: value,\n        index: index\n    };\n}\n// store a symbol for caching the pending delete info index in the data item objects\nvar PENDING_DELETE_INDEX_SYM = createSymbolOrString('_ko_ffe_pending_delete_index');\n// Extend the given context with a $index (passed in via the createChildContext)\nfunction extend$context(include$index, $context) {\n    if (include$index) {\n        $context.$index = observable();\n    }\n    $context.$list = this.data;\n}\nvar ForEachBinding = /** @class */ (function (_super) {\n    __extends(ForEachBinding, _super);\n    // NOTE: valid valueAccessors include:\n    //    []\n    //    observable([])\n    //    observableArray([])\n    //    computed\n    //    {data: array, name: string, as: string}\n    function ForEachBinding(params) {\n        var _this = _super.call(this, params) || this;\n        var settings = {};\n        if (isPlainObject(_this.value)) {\n            Object.assign(settings, _this.value);\n        }\n        _this.noIndex = settings.noIndex || _this.allBindings.get('noIndex');\n        _this.as = settings.as || _this.allBindings.get('as');\n        _this.data = settings.data || (unwrap(_this.$context.$rawData) === _this.value ? _this.$context.$rawData : _this.value);\n        _this.container = virtualElements.isStartComment(_this.$element)\n            ? _this.$element.parentNode : _this.$element;\n        _this.generateContext = _this.createContextGenerator(_this.as, !_this.noIndex);\n        if (_this.noIndex) {\n            _this.updateIndexes = false;\n        }\n        _this.templateNode = makeTemplateNode(settings.templateNode || (settings.name\n            ? document.getElementById(settings.name).cloneNode(true)\n            : _this.$element));\n        ['afterAdd', 'beforeRemove', 'afterQueueFlush', 'beforeQueueFlush']\n            .forEach(function (p) { _this[p] = settings[p] || _this.allBindings.get(p); });\n        _this.changeQueue = [];\n        _this.firstLastNodesList = [];\n        _this.indexesToDelete = [];\n        _this.rendering_queued = false;\n        _this.pendingDeletes = [];\n        // Expose the conditional so that if the `foreach` data is empty, successive\n        // 'else' bindings will appear.\n        _this.isNotEmpty = observable(Boolean(unwrap(_this.data).length));\n        domData.set(_this.$element, 'conditional', {\n            elseChainSatisfied: _this.isNotEmpty\n        });\n        // Remove existing content.\n        virtualElements.emptyNode(_this.$element);\n        // Prime content\n        var primeData = unwrap(_this.data);\n        if (primeData.map) {\n            _this.onArrayChange(primeData.map(valueToChangeAddItem), true);\n        }\n        else {\n            _this.completeBinding();\n        }\n        // Watch for changes\n        if (isObservable(_this.data)) {\n            if (!_this.data.indexOf) {\n                // Make sure the observable is trackable.\n                _this.data = _this.data.extend({ trackArrayChanges: true });\n            }\n            _this.changeSubs = _this.data.subscribe(_this.onArrayChange, _this, 'arrayChange');\n        }\n        return _this;\n    }\n    ForEachBinding.prototype.dispose = function () {\n        if (this.changeSubs) {\n            this.changeSubs.dispose();\n        }\n        this.flushPendingDeletes();\n    };\n    // If the array changes we register the change.\n    ForEachBinding.prototype.onArrayChange = function (changeSet, isInitial) {\n        var _this = this;\n        var changeMap = {\n            added: [],\n            deleted: []\n        };\n        // knockout array change notification index handling:\n        // - sends the original array indexes for deletes\n        // - sends the new array indexes for adds\n        // - sorts them all by index in ascending order\n        // because of this, when checking for possible batch additions, any delete can be between to adds with neighboring indexes, so only additions should be checked\n        for (var i = 0, len = changeSet.length; i < len; i++) {\n            if (changeMap.added.length && changeSet[i].status === 'added') {\n                var lastAdd = changeMap.added[changeMap.added.length - 1];\n                var lastIndex = lastAdd.isBatch ? lastAdd.index + lastAdd.values.length - 1 : lastAdd.index;\n                if (lastIndex + 1 === changeSet[i].index) {\n                    if (!lastAdd.isBatch) {\n                        // transform the last addition into a batch addition object\n                        lastAdd = {\n                            isBatch: true,\n                            status: 'added',\n                            index: lastAdd.index,\n                            values: [lastAdd.value]\n                        };\n                        changeMap.added.splice(changeMap.added.length - 1, 1, lastAdd);\n                    }\n                    lastAdd.values.push(changeSet[i].value);\n                    continue;\n                }\n            }\n            changeMap[changeSet[i].status].push(changeSet[i]);\n        }\n        if (changeMap.deleted.length > 0) {\n            this.changeQueue.push.apply(this.changeQueue, changeMap.deleted);\n            this.changeQueue.push({ status: 'clearDeletedIndexes' });\n        }\n        this.changeQueue.push.apply(this.changeQueue, changeMap.added);\n        // Once a change is registered, the ticking count-down starts for the processQueue.\n        if (this.changeQueue.length > 0 && !this.rendering_queued) {\n            this.rendering_queued = true;\n            if (isInitial) {\n                this.processQueue();\n            }\n            else {\n                ForEachBinding.animateFrame.call(window, function () { return _this.processQueue(); });\n            }\n        }\n    };\n    ForEachBinding.prototype.startQueueFlush = function () {\n        // Callback so folks can do things before the queue flush.\n        if (typeof this.beforeQueueFlush === 'function') {\n            this.beforeQueueFlush(this.changeQueue);\n        }\n    };\n    ForEachBinding.prototype.endQueueFlush = function () {\n        // Callback so folks can do things.\n        if (typeof this.afterQueueFlush === 'function') {\n            this.afterQueueFlush(this.changeQueue);\n        }\n    };\n    // Reflect all the changes in the queue in the DOM, then wipe the queue.\n    ForEachBinding.prototype.processQueue = function () {\n        var _this = this;\n        var isEmpty = !unwrap(this.data).length;\n        var lowestIndexChanged = MAX_LIST_SIZE;\n        this.startQueueFlush();\n        arrayForEach(this.changeQueue, function (changeItem) {\n            if (typeof changeItem.index === 'number') {\n                lowestIndexChanged = Math.min(lowestIndexChanged, changeItem.index);\n            }\n            _this[changeItem.status](changeItem);\n        });\n        this.flushPendingDeletes();\n        this.rendering_queued = false;\n        // Update our indexes.\n        if (this.updateIndexes) {\n            this.updateIndexes(lowestIndexChanged);\n        }\n        this.endQueueFlush();\n        this.changeQueue = [];\n        // Update the conditional exposed on the domData\n        if (isEmpty !== !this.isNotEmpty()) {\n            this.isNotEmpty(!isEmpty);\n        }\n    };\n    /**\n     * Return a function that generates the context for a given node.\n     *\n     * We generate a single function that reduces our inner-loop calculations,\n     * which has a good chance of being optimized by the browser.\n     *\n     * @param  {string} as  The name given to each item in the list\n     * @param  {bool} index Whether to calculate indexes\n     * @return {function}   A function(dataValue) that returns the context\n     */\n    ForEachBinding.prototype.createContextGenerator = function (as, index) {\n        var $context = this.$context;\n        switch ((as && 1) | (index && 2)) {\n            case 0:// no-as & no-index\n                return function (v) {\n                    return $context.createChildContext(v, null, extend$context.bind(this, false));\n                };\n            case 1:// as + no-index\n                return function (v) {\n                    var obj = { $index: undefined, $list: this.data };\n                    obj[as] = v;\n                    return $context.extend(obj);\n                };\n            case 2:// no-as + index\n                return function (v) {\n                    return $context.createChildContext(v, null, extend$context.bind(this, true));\n                };\n            case 3:// as + index\n                return function (v) {\n                    var obj = { $index: observable(), $list: this.data };\n                    obj[as] = v;\n                    return $context.extend(obj);\n                };\n        }\n    };\n    // Process a changeItem with {status: 'added', ...}\n    ForEachBinding.prototype.added = function (changeItem) {\n        var index = changeItem.index;\n        var valuesToAdd = changeItem.isBatch ? changeItem.values : [changeItem.value];\n        var referenceElement = this.getLastNodeBeforeIndex(index);\n        // gather all childnodes for a possible batch insertion\n        var allChildNodes = [];\n        var asyncBindingResults = [];\n        var children;\n        for (var i = 0, len = valuesToAdd.length; i < len; ++i) {\n            // we check if we have a pending delete with reusable nodesets for this data, and if yes, we reuse one nodeset\n            var pendingDelete = this.getPendingDeleteFor(valuesToAdd[i]);\n            if (pendingDelete && pendingDelete.nodesets.length) {\n                children = pendingDelete.nodesets.pop();\n            }\n            else {\n                var templateClone = this.templateNode.cloneNode(true);\n                // Apply bindings first, and then process child nodes,\n                // because bindings can add childnodes.\n                var bindingResult = applyBindingsToDescendants(this.generateContext(valuesToAdd[i]), templateClone);\n                asyncBindingResults.push(bindingResult);\n                children = virtualElements.childNodes(templateClone);\n            }\n            // Note discussion at https://github.com/angular/angular.js/issues/7851\n            allChildNodes.push.apply(allChildNodes, Array.prototype.slice.call(children));\n            this.firstLastNodesList.splice(index + i, 0, { first: children[0], last: children[children.length - 1] });\n        }\n        if (typeof this.afterAdd === 'function') {\n            this.afterAdd({\n                nodeOrArrayInserted: this.insertAllAfter(allChildNodes, referenceElement),\n                foreachInstance: this\n            });\n        }\n        else {\n            this.insertAllAfter(allChildNodes, referenceElement);\n        }\n        this.completeBinding(options.Promise.all(asyncBindingResults));\n    };\n    ForEachBinding.prototype.getNodesForIndex = function (index) {\n        var result = [];\n        var ptr = this.firstLastNodesList[index].first;\n        var last = this.firstLastNodesList[index].last;\n        result.push(ptr);\n        while (ptr && ptr !== last) {\n            ptr = ptr.nextSibling;\n            result.push(ptr);\n        }\n        return result;\n    };\n    ForEachBinding.prototype.getLastNodeBeforeIndex = function (index) {\n        if (index < 1 || index - 1 >= this.firstLastNodesList.length) {\n            return null;\n        }\n        return this.firstLastNodesList[index - 1].last;\n    };\n    /**\n     * Get the active (focused) node, if it's a child of the given node.\n     */\n    ForEachBinding.prototype.activeChildElement = function (node) {\n        var active = document.activeElement;\n        if (domNodeIsContainedBy(active, node)) {\n            return active;\n        }\n    };\n    ForEachBinding.prototype.insertAllAfter = function (nodeOrNodeArrayToInsert, insertAfterNode) {\n        var frag;\n        var len;\n        var i;\n        var active = null;\n        var containerNode = this.$element;\n        // Poor man's node and array check.\n        if (nodeOrNodeArrayToInsert.nodeType === undefined && nodeOrNodeArrayToInsert.length === undefined) {\n            throw new Error('Expected a single node or a node array');\n        }\n        if (nodeOrNodeArrayToInsert.nodeType !== undefined) {\n            active = this.activeChildElement(nodeOrNodeArrayToInsert);\n            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert, insertAfterNode);\n            return [nodeOrNodeArrayToInsert];\n        }\n        else if (nodeOrNodeArrayToInsert.length === 1) {\n            active = this.activeChildElement(nodeOrNodeArrayToInsert[0]);\n            virtualElements.insertAfter(containerNode, nodeOrNodeArrayToInsert[0], insertAfterNode);\n        }\n        else if (supportsDocumentFragment) {\n            frag = document.createDocumentFragment();\n            for (i = 0, len = nodeOrNodeArrayToInsert.length; i !== len; ++i) {\n                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n                frag.appendChild(nodeOrNodeArrayToInsert[i]);\n            }\n            virtualElements.insertAfter(containerNode, frag, insertAfterNode);\n        }\n        else {\n            // Nodes are inserted in reverse order - pushed down immediately after\n            // the last node for the previous item or as the first node of element.\n            for (i = nodeOrNodeArrayToInsert.length - 1; i >= 0; --i) {\n                active = active || this.activeChildElement(nodeOrNodeArrayToInsert[i]);\n                var child = nodeOrNodeArrayToInsert[i];\n                if (!child) {\n                    break;\n                }\n                virtualElements.insertAfter(containerNode, child, insertAfterNode);\n            }\n        }\n        if (active) {\n            active.focus();\n        }\n        return nodeOrNodeArrayToInsert;\n    };\n    // checks if the deleted data item should be handled with delay for a possible reuse at additions\n    ForEachBinding.prototype.shouldDelayDeletion = function (data) {\n        return data && (typeof data === 'object' || typeof data === 'function');\n    };\n    // gets the pending deletion info for this data item\n    ForEachBinding.prototype.getPendingDeleteFor = function (data) {\n        var index = data && data[PENDING_DELETE_INDEX_SYM];\n        if (index === undefined)\n            return null;\n        return this.pendingDeletes[index];\n    };\n    // tries to find the existing pending delete info for this data item, and if it can't, it registeres one\n    ForEachBinding.prototype.getOrCreatePendingDeleteFor = function (data) {\n        var pd = this.getPendingDeleteFor(data);\n        if (pd) {\n            return pd;\n        }\n        pd = {\n            data: data,\n            nodesets: []\n        };\n        data[PENDING_DELETE_INDEX_SYM] = this.pendingDeletes.length;\n        this.pendingDeletes.push(pd);\n        return pd;\n    };\n    // Process a changeItem with {status: 'deleted', ...}\n    ForEachBinding.prototype.deleted = function (changeItem) {\n        // if we should delay the deletion of this data, we add the nodeset to the pending delete info object\n        if (this.shouldDelayDeletion(changeItem.value)) {\n            var pd = this.getOrCreatePendingDeleteFor(changeItem.value);\n            pd.nodesets.push(this.getNodesForIndex(changeItem.index));\n        }\n        else {\n            this.removeNodes(this.getNodesForIndex(changeItem.index));\n        }\n        this.indexesToDelete.push(changeItem.index);\n    };\n    // removes a set of nodes from the DOM\n    ForEachBinding.prototype.removeNodes = function (nodes) {\n        if (!nodes.length) {\n            return;\n        }\n        function removeFn() {\n            var parent = nodes[0].parentNode;\n            for (var i = nodes.length - 1; i >= 0; --i) {\n                cleanNode(nodes[i]);\n                parent.removeChild(nodes[i]);\n            }\n        }\n        if (this.beforeRemove) {\n            var beforeRemoveReturn = this.beforeRemove({\n                nodesToRemove: nodes, foreachInstance: this\n            }) || {};\n            // If beforeRemove returns a `then`–able e.g. a Promise, we remove\n            // the nodes when that thenable completes.  We pass any errors to\n            // ko.onError.\n            if (typeof beforeRemoveReturn.then === 'function') {\n                beforeRemoveReturn.then(removeFn, options.onError);\n            }\n        }\n        else {\n            removeFn();\n        }\n    };\n    // flushes the pending delete info store\n    // this should be called after queue processing has finished, so that data items and remaining (not reused) nodesets get cleaned up\n    // we also call it on dispose not to leave any mess\n    ForEachBinding.prototype.flushPendingDeletes = function () {\n        for (var i = 0, len = this.pendingDeletes.length; i !== len; ++i) {\n            var pd = this.pendingDeletes[i];\n            while (pd.nodesets.length) {\n                this.removeNodes(pd.nodesets.pop());\n            }\n            if (pd.data && pd.data[PENDING_DELETE_INDEX_SYM] !== undefined) {\n                delete pd.data[PENDING_DELETE_INDEX_SYM];\n            }\n        }\n        this.pendingDeletes = [];\n    };\n    // We batch our deletion of item indexes in our parallel array.\n    // See brianmhunt/knockout-fast-foreach#6/#8\n    ForEachBinding.prototype.clearDeletedIndexes = function () {\n        // We iterate in reverse on the presumption (following the unit tests) that KO's diff engine\n        // processes diffs (esp. deletes) monotonically ascending i.e. from index 0 -> N.\n        for (var i = this.indexesToDelete.length - 1; i >= 0; --i) {\n            this.firstLastNodesList.splice(this.indexesToDelete[i], 1);\n        }\n        this.indexesToDelete = [];\n    };\n    ForEachBinding.prototype.updateIndexes = function (fromIndex) {\n        var ctx;\n        for (var i = fromIndex, len = this.firstLastNodesList.length; i < len; ++i) {\n            ctx = this.getContextStartingFrom(this.firstLastNodesList[i].first);\n            if (ctx) {\n                ctx.$index(i);\n            }\n        }\n    };\n    ForEachBinding.prototype.getContextStartingFrom = function (node) {\n        var ctx;\n        while (node) {\n            ctx = contextFor(node);\n            if (ctx) {\n                return ctx;\n            }\n            node = node.nextSibling;\n        }\n    };\n    /**\n     * Set whether the binding is always synchronous.\n     * Useful during testing.\n     */\n    ForEachBinding.setSync = function (toggle) {\n        var w = options.global;\n        if (toggle) {\n            ForEachBinding.animateFrame = function (frame) { frame(); };\n        }\n        else {\n            ForEachBinding.animateFrame = w.requestAnimationFrame || w.webkitRequestAnimationFrame ||\n                w.mozRequestAnimationFrame || w.msRequestAnimationFrame ||\n                function (cb) { return w.setTimeout(cb, 1000 / 60); };\n        }\n    };\n    Object.defineProperty(ForEachBinding.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"ForEach\", {\n        /* TODO: Remove; for legacy/testing */\n        get: function () { return this; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ForEachBinding, \"PENDING_DELETE_INDEX_SYM\", {\n        get: function () { return PENDING_DELETE_INDEX_SYM; },\n        enumerable: true,\n        configurable: true\n    });\n    return ForEachBinding;\n}(AsyncBindingHandler));\n\nvar bindings = {\n    foreach: ForEachBinding\n};\n// By default, foreach will be async.\nForEachBinding.setSync(false);\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.foreach.js.map\n","import { cloneNodes, makeArray, virtualElements } from 'tko.utils';\nimport { unwrap } from 'tko.observable';\nimport { AsyncBindingHandler, applyBindingsToDescendants } from 'tko.bind';\nimport { LifeCycle } from 'tko.lifecycle';\nimport registry from 'tko.utils.component';\n\n/*! *****************************************************************************\r\nCopyright (c) Microsoft Corporation. All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = Object.setPrototypeOf ||\r\n    ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n    function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n\r\nfunction __extends(d, b) {\r\n    extendStatics(d, b);\r\n    function __() { this.constructor = d; }\r\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\n\n//\n// Binding Handler for Components\n//\nvar componentLoadingOperationUniqueId = 0;\nvar ComponentBinding = /** @class */ (function (_super) {\n    __extends(ComponentBinding, _super);\n    function ComponentBinding(params) {\n        var _this = _super.call(this, params) || this;\n        _this.originalChildNodes = makeArray(virtualElements.childNodes(_this.$element));\n        _this.computed('computeApplyComponent');\n        return _this;\n    }\n    ComponentBinding.prototype.cloneTemplateIntoElement = function (componentName, componentDefinition, element) {\n        var template = componentDefinition['template'];\n        if (!template) {\n            throw new Error('Component \\'' + componentName + '\\' has no template');\n        }\n        var clonedNodesArray = cloneNodes(template);\n        virtualElements.setDomNodeChildren(element, clonedNodesArray);\n    };\n    ComponentBinding.prototype.createViewModel = function (componentDefinition, element, originalChildNodes, componentParams) {\n        var componentViewModelFactory = componentDefinition.createViewModel;\n        return componentViewModelFactory\n            ? componentViewModelFactory.call(componentDefinition, componentParams, { 'element': element, 'templateNodes': originalChildNodes })\n            : componentParams; // Template-only component\n    };\n    ComponentBinding.prototype.computeApplyComponent = function () {\n        var _this = this;\n        var value = unwrap(this.value);\n        var componentName;\n        var componentParams;\n        if (typeof value === 'string') {\n            componentName = value;\n        }\n        else {\n            componentName = unwrap(value['name']);\n            componentParams = unwrap(value['params']);\n        }\n        this.latestComponentName = componentName;\n        if (!componentName) {\n            throw new Error('No component name specified');\n        }\n        this.loadingOperationId = this.currentLoadingOperationId = ++componentLoadingOperationUniqueId;\n        registry.get(componentName, function (defn) { return _this.applyComponentDefinition(componentName, componentParams, defn); });\n    };\n    ComponentBinding.prototype.applyComponentDefinition = function (componentName, componentParams, componentDefinition) {\n        var _this = this;\n        // If this is not the current load operation for this element, ignore it.\n        if (this.currentLoadingOperationId !== this.loadingOperationId ||\n            this.latestComponentName !== componentName) {\n            return;\n        }\n        // Clean up previous state\n        this.cleanUpState();\n        var element = this.$element;\n        // Instantiate and bind new component. Implicitly this cleans any old DOM nodes.\n        if (!componentDefinition) {\n            throw new Error('Unknown component \\'' + componentName + '\\'');\n        }\n        this.cloneTemplateIntoElement(componentName, componentDefinition, element);\n        var componentViewModel = this.createViewModel(componentDefinition, element, this.originalChildNodes, componentParams);\n        if (componentViewModel instanceof LifeCycle) {\n            componentViewModel.anchorTo(this.$element);\n        }\n        var ctxExtender = function (ctx) { return Object.assign(ctx, {\n            $component: componentViewModel,\n            $componentTemplateNodes: _this.originalChildNodes\n        }); };\n        var childBindingContext = this.$context.createChildContext(componentViewModel, /* dataItemAlias */ undefined, ctxExtender);\n        this.currentViewModel = componentViewModel;\n        applyBindingsToDescendants(childBindingContext, this.$element)\n            .then(this.completeBinding);\n    };\n    ComponentBinding.prototype.cleanUpState = function () {\n        var currentView = this.currentViewModel;\n        var currentViewDispose = currentView && currentView.dispose;\n        if (typeof currentViewDispose === 'function') {\n            currentViewDispose.call(currentView);\n        }\n        this.currentViewModel = null;\n        // Any in-flight loading operation is no longer relevant, so make sure we ignore its completion\n        this.currentLoadingOperationId = null;\n    };\n    ComponentBinding.prototype.dispose = function () {\n        this.cleanUpState();\n        _super.prototype.dispose.call(this);\n    };\n    Object.defineProperty(ComponentBinding.prototype, \"controlsDescendants\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    Object.defineProperty(ComponentBinding, \"allowVirtualElements\", {\n        get: function () { return true; },\n        enumerable: true,\n        configurable: true\n    });\n    return ComponentBinding;\n}(AsyncBindingHandler));\n\nvar bindings = { component: ComponentBinding };\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.component.js.map\n","import { options } from 'tko.utils';\n\nvar BindingHandlerObject = /** @class */ (function () {\n    function BindingHandlerObject() {\n    }\n    BindingHandlerObject.prototype.set = function (nameOrObject, value) {\n        if (typeof nameOrObject === 'string') {\n            this[nameOrObject] = value;\n        }\n        else if (typeof nameOrObject === 'object') {\n            if (value !== undefined) {\n                options.onError(new Error('Given extraneous `value` parameter (first param should be a string, but it was an object).' + nameOrObject));\n            }\n            Object.assign(this, nameOrObject);\n        }\n        else {\n            options.onError(new Error('Given a bad binding handler type: ' + nameOrObject));\n        }\n    };\n    /**\n     * The handler may have a `.` in it, e.g. `attr.title`, in which case the\n     * handler is `attr`.  Otherwise it's the name given\n     */\n    BindingHandlerObject.prototype.get = function (nameOrDotted) {\n        var name = nameOrDotted.split('.')[0];\n        return this[name];\n    };\n    return BindingHandlerObject;\n}());\n\nvar Provider = /** @class */ (function () {\n    function Provider(params) {\n        if (params === void 0) { params = {}; }\n        if (this.constructor === Provider) {\n            throw new Error('Provider is an abstract base class.');\n        }\n        if (!('FOR_NODE_TYPES' in this)) {\n            // FOR_NODE_TYPES must return a list of integers corresponding to the\n            // node.nodeType's that the provider handles.\n            throw new Error('Providers must have FOR_NODE_TYPES property');\n        }\n        this.bindingHandlers = params.bindingHandlers || new BindingHandlerObject();\n        this.globals = params.globals || {};\n    }\n    Provider.prototype.nodeHasBindings = function () { };\n    Provider.prototype.getBindingAccessors = function () { };\n    Provider.prototype.preprocessNode = function () { };\n    Provider.prototype.postProcess = function () { };\n    return Provider;\n}());\n\nexport { Provider };\n//# sourceMappingURL=tko.provider.js.map\n","import { addDisposeCallback, createSymbolOrString } from 'tko.utils';\nimport { computed } from 'tko.computed';\n\n'use strict';\nvar SUBSCRIPTIONS = createSymbolOrString('LifeCycle Subscriptions List');\nvar ANCHOR_NODE = createSymbolOrString('LifeCycle Anchor Node');\nvar LifeCycle = /** @class */ (function () {\n    function LifeCycle() {\n    }\n    // NOTE: For more advanced integration as an ES6 mixin, see e.g.:\n    // http://justinfagnani.com/2015/12/21/real-mixins-with-javascript-classes/\n    /**\n     * Copy the properties of the LifeCycle class to the target (or its prototype)\n     *\n     * NOTE: getOwnPropertyNames is needed to copy the non-enumerable properties.\n     */\n    LifeCycle.mixInto = function (Constructor) {\n        var target = Constructor.prototype || Constructor;\n        var mixin = LifeCycle.prototype;\n        for (var _i = 0, _a = Object.getOwnPropertyNames(mixin); _i < _a.length; _i++) {\n            var prop = _a[_i];\n            target[prop] = mixin[prop];\n        }\n    };\n    LifeCycle.prototype.subscribe = function (observable, action) {\n        if (typeof action === 'string') {\n            action = this[action].bind(this);\n        }\n        this.addDisposable(observable.subscribe(action));\n    };\n    LifeCycle.prototype.computed = function (params) {\n        if (typeof params === 'string') {\n            params = { read: this[params], write: this[params], owner: this };\n        }\n        else if (typeof params === 'object') {\n            // Pass directly.\n        }\n        else if (typeof params === 'function') {\n            params = { read: params, write: params };\n        }\n        else {\n            throw new Error('LifeCycle::computed not given a valid type.');\n        }\n        params.disposeWhenNodeIsRemoved = this[ANCHOR_NODE];\n        return this.addDisposable(computed(params));\n    };\n    /**\n     * Add an event listener for the given or anchored node.\n     * @param {node} [node] (optional) The target node (otherwise the anchored node)\n     * @param {string} [type] Event type\n     * @param {function|string} [action] Either call the given function or `this[action]`\n     * @param {object} [options] (optional) Passed as `options` to `node.addEventListener`\n     */\n    LifeCycle.prototype.addEventListener = function () {\n        var args = [];\n        for (var _i = 0; _i < arguments.length; _i++) {\n            args[_i] = arguments[_i];\n        }\n        var node = args[0].nodeType ? args.shift() : this[ANCHOR_NODE];\n        var type = args[0], act = args[1], options = args[2];\n        var handler = typeof act === 'string' ? this[act].bind(this) : act;\n        this.__addEventListener(node, type, handler, options);\n    };\n    LifeCycle.prototype.__addEventListener = function (node, eventType, handler, options) {\n        node.addEventListener(eventType, handler, options);\n        function dispose() { node.removeEventListener(eventType, handler); }\n        addDisposeCallback(node, dispose);\n        this.addDisposable({ dispose: dispose });\n    };\n    LifeCycle.prototype.anchorTo = function (node) {\n        var _this = this;\n        addDisposeCallback(node, function () { return _this.dispose(); });\n        this[ANCHOR_NODE] = node;\n    };\n    LifeCycle.prototype.dispose = function () {\n        var subscriptions = this[SUBSCRIPTIONS] || [];\n        subscriptions.forEach(function (s) { return s.dispose(); });\n        this[SUBSCRIPTIONS] = [];\n        this[ANCHOR_NODE] = null;\n    };\n    LifeCycle.prototype.addDisposable = function (subscription) {\n        var subscriptions = this[SUBSCRIPTIONS] || [];\n        if (!this[SUBSCRIPTIONS]) {\n            this[SUBSCRIPTIONS] = subscriptions;\n        }\n        if (typeof subscription.dispose !== 'function') {\n            throw new Error('Lifecycle::addDisposable argument missing `dispose`.');\n        }\n        subscriptions.push(subscription);\n        return subscription;\n    };\n    return LifeCycle;\n}());\n\nexport { LifeCycle };\n//# sourceMappingURL=tko.lifecycle.js.map\n","import { addOrRemoveItem, arrayFilter, arrayForEach, arrayGetDistinctValues, arrayIndexOf, arrayMap, arrayPushAll, createSymbolOrString, domData, ensureSelectElementIsRenderedCorrectly, ieVersion, makeArray, objectForEach, options, registerEventHandler, safeSetTimeout, setElementName, setHtml, setOptionNodeSelectionState, setTextContent, stringStartsWith, stringTrim, tagNameLower, toggleDomNodeCssClass, triggerEvent } from 'tko.utils';\nimport { dependencyDetection, isWriteableObservable, unwrap } from 'tko.observable';\nimport { computed, pureComputed } from 'tko.computed';\nimport { applyBindingAccessorsToNode, applyBindingsToDescendants, setDomNodeChildrenFromArrayMapping } from 'tko.bind';\n\nvar attr = {\n    update: function (element, valueAccessor, allBindings) {\n        var value = unwrap(valueAccessor()) || {};\n        objectForEach(value, function (attrName, attrValue) {\n            attrValue = unwrap(attrValue);\n            // Find the namespace of this attribute, if any.\n            // Defaulting to `null` should be ok, as\n            //\n            //  element.setAttributeNS( null, name, value ) ~ element.setAttribute( name, value )\n            //  element.removetAttributeNS( null, name ) ~ element.removeAttribute( name )\n            //\n            var prefixLen = attrName.indexOf(':');\n            var namespace = prefixLen < 0 ? null : element.lookupNamespaceURI(attrName.substr(0, prefixLen));\n            // To cover cases like \"attr: { checked:someProp }\", we want to remove the attribute entirely\n            // when someProp is a \"no value\"-like value (strictly null, false, or undefined)\n            // (because the absence of the \"checked\" attr is how to mark an element as not checked, etc.)\n            var toRemove = (attrValue === false) || (attrValue === null) || (attrValue === undefined);\n            if (toRemove) {\n                element.removeAttributeNS(namespace, attrName);\n            }\n            else {\n                element.setAttributeNS(namespace, attrName, attrValue.toString());\n            }\n            // Treat \"name\" specially - although you can think of it as an attribute, it also needs\n            // special handling on older versions of IE (https://github.com/SteveSanderson/knockout/pull/333)\n            // Deliberately being case-sensitive here because XHTML would regard \"Name\" as a different thing\n            // entirely, and there's no strong reason to allow for such casing in HTML.\n            if (attrName === \"name\") {\n                setElementName(element, toRemove ? \"\" : attrValue.toString());\n            }\n        });\n    }\n};\n\nvar checked = {\n    after: ['value', 'attr'],\n    init: function (element, valueAccessor, allBindings) {\n        var checkedValue = pureComputed(function () {\n            // Treat \"value\" like \"checkedValue\" when it is included with \"checked\" binding\n            if (allBindings['has']('checkedValue')) {\n                return unwrap(allBindings.get('checkedValue'));\n            }\n            else if (allBindings['has']('value')) {\n                return unwrap(allBindings.get('value'));\n            }\n            return element.value;\n        });\n        function updateModel() {\n            // This updates the model value from the view value.\n            // It runs in response to DOM events (click) and changes in checkedValue.\n            var isChecked = element.checked, elemValue = useCheckedValue ? checkedValue() : isChecked;\n            // When we're first setting up this computed, don't change any model state.\n            if (dependencyDetection.isInitial()) {\n                return;\n            }\n            // We can ignore unchecked radio buttons, because some other radio\n            // button will be getting checked, and that one can take care of updating state.\n            if (isRadio && !isChecked) {\n                return;\n            }\n            var modelValue = dependencyDetection.ignore(valueAccessor);\n            if (valueIsArray) {\n                var writableValue = rawValueIsNonArrayObservable ? modelValue.peek() : modelValue;\n                if (oldElemValue !== elemValue) {\n                    // When we're responding to the checkedValue changing, and the element is\n                    // currently checked, replace the old elem value with the new elem value\n                    // in the model array.\n                    if (isChecked) {\n                        addOrRemoveItem(writableValue, elemValue, true);\n                        addOrRemoveItem(writableValue, oldElemValue, false);\n                    }\n                    oldElemValue = elemValue;\n                }\n                else {\n                    // When we're responding to the user having checked/unchecked a checkbox,\n                    // add/remove the element value to the model array.\n                    addOrRemoveItem(writableValue, elemValue, isChecked);\n                }\n                if (rawValueIsNonArrayObservable && isWriteableObservable(modelValue)) {\n                    modelValue(writableValue);\n                }\n            }\n            else {\n                valueAccessor(elemValue, { onlyIfChanged: true });\n            }\n        }\n        \n        function updateView() {\n            // This updates the view value from the model value.\n            // It runs in response to changes in the bound (checked) value.\n            var modelValue = unwrap(valueAccessor());\n            if (valueIsArray) {\n                // When a checkbox is bound to an array, being checked represents its value being present in that array\n                element.checked = arrayIndexOf(modelValue, checkedValue()) >= 0;\n            }\n            else if (isCheckbox) {\n                // When a checkbox is bound to any other value (not an array), being checked represents the value being trueish\n                element.checked = modelValue;\n            }\n            else {\n                // For radio buttons, being checked means that the radio button's value corresponds to the model value\n                element.checked = (checkedValue() === modelValue);\n            }\n        }\n        \n        var isCheckbox = element.type == \"checkbox\", isRadio = element.type == \"radio\";\n        // Only bind to check boxes and radio buttons\n        if (!isCheckbox && !isRadio) {\n            return;\n        }\n        var rawValue = valueAccessor(), valueIsArray = isCheckbox && (unwrap(rawValue) instanceof Array), rawValueIsNonArrayObservable = !(valueIsArray && rawValue.push && rawValue.splice), oldElemValue = valueIsArray ? checkedValue() : undefined, useCheckedValue = isRadio || valueIsArray;\n        // Set up two computeds to update the binding:\n        // The first responds to changes in the checkedValue value and to element clicks\n        computed(updateModel, null, { disposeWhenNodeIsRemoved: element });\n        registerEventHandler(element, \"click\", updateModel);\n        // The second responds to changes in the model value (the one associated with the checked binding)\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n        rawValue = undefined;\n    }\n};\nvar checkedValue = {\n    update: function (element, valueAccessor) {\n        element.value = unwrap(valueAccessor());\n    }\n};\n\n// For certain common events (currently just 'click'), allow a simplified data-binding syntax\n// e.g. click:handler instead of the usual full-length event:{click:handler}\nfunction makeEventHandlerShortcut(eventName) {\n    return {\n        init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n            var newValueAccessor = function () {\n                var result = {};\n                result[eventName] = valueAccessor();\n                return result;\n            };\n            eventHandler.init.call(this, element, newValueAccessor, allBindings, viewModel, bindingContext);\n        }\n    };\n}\nvar eventHandler = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var eventsToHandle = valueAccessor() || {};\n        objectForEach(eventsToHandle, function (eventName) {\n            if (typeof eventName == \"string\") {\n                registerEventHandler(element, eventName, function (event) {\n                    var handlerReturnValue;\n                    var handlerFunction = valueAccessor()[eventName];\n                    if (!handlerFunction)\n                        return;\n                    try {\n                        // Take all the event args, and prefix with the viewmodel\n                        var argsForHandler = makeArray(arguments);\n                        viewModel = bindingContext['$data'];\n                        argsForHandler.unshift(viewModel);\n                        handlerReturnValue = handlerFunction.apply(viewModel, argsForHandler);\n                    }\n                    finally {\n                        if (handlerReturnValue !== true) {\n                            if (event.preventDefault)\n                                event.preventDefault();\n                            else\n                                event.returnValue = false;\n                        }\n                    }\n                    var bubble = allBindings.get(eventName + 'Bubble') !== false;\n                    if (!bubble) {\n                        event.cancelBubble = true;\n                        if (event.stopPropagation)\n                            event.stopPropagation();\n                    }\n                });\n            }\n        });\n    }\n};\nvar onHandler = {\n    init: eventHandler.init,\n    preprocess: function (value, key, addBinding) {\n        addBinding(key.replace('on.', ''), '=>' + value);\n    }\n};\n\n// 'click' is just a shorthand for the usual full-length event:{click:handler}\nvar click = makeEventHandlerShortcut('click');\n\nvar css = {\n    aliases: ['class'],\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value !== null && typeof value == \"object\") {\n            objectForEach(value, function (className, shouldHaveClass) {\n                shouldHaveClass = unwrap(shouldHaveClass);\n                toggleDomNodeCssClass(element, className, shouldHaveClass);\n            });\n        }\n        else {\n            value = stringTrim(String(value || '')); // Make sure we don't try to store or set a non-string value\n            toggleDomNodeCssClass(element, element[css.classesWrittenByBindingKey], false);\n            element[css.classesWrittenByBindingKey] = value;\n            toggleDomNodeCssClass(element, value, true);\n        }\n    },\n    classesWrittenByBindingKey: createSymbolOrString('__ko__cssValue')\n};\n\nvar enable = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        if (value && element.disabled) {\n            element.removeAttribute(\"disabled\");\n        }\n        else if ((!value) && (!element.disabled)) {\n            element.disabled = true;\n        }\n    }\n};\nvar disable = {\n    update: function (element, valueAccessor) {\n        enable.update(element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar hasfocusUpdatingProperty = createSymbolOrString('__ko_hasfocusUpdating');\nvar hasfocusLastValue = createSymbolOrString('__ko_hasfocusLastValue');\nvar hasfocus = {\n    init: function (element, valueAccessor /*, allBindings */) {\n        var handleElementFocusChange = function (isFocused) {\n            // Where possible, ignore which event was raised and determine focus state using activeElement,\n            // as this avoids phantom focus/blur events raised when changing tabs in modern browsers.\n            // However, not all KO-targeted browsers (Firefox 2) support activeElement. For those browsers,\n            // prevent a loss of focus when changing tabs/windows by setting a flag that prevents hasfocus\n            // from calling 'blur()' on the element when it loses focus.\n            // Discussion at https://github.com/SteveSanderson/knockout/pull/352\n            element[hasfocusUpdatingProperty] = true;\n            var ownerDoc = element.ownerDocument;\n            if (\"activeElement\" in ownerDoc) {\n                var active;\n                try {\n                    active = ownerDoc.activeElement;\n                }\n                catch (e) {\n                    // IE9 throws if you access activeElement during page load (see issue #703)\n                    active = ownerDoc.body;\n                }\n                isFocused = (active === element);\n            }\n            // var modelValue = valueAccessor();\n            valueAccessor(isFocused, { onlyIfChanged: true });\n            //cache the latest value, so we can avoid unnecessarily calling focus/blur in the update function\n            element[hasfocusLastValue] = isFocused;\n            element[hasfocusUpdatingProperty] = false;\n        };\n        var handleElementFocusIn = handleElementFocusChange.bind(null, true);\n        var handleElementFocusOut = handleElementFocusChange.bind(null, false);\n        registerEventHandler(element, \"focus\", handleElementFocusIn);\n        registerEventHandler(element, \"focusin\", handleElementFocusIn); // For IE\n        registerEventHandler(element, \"blur\", handleElementFocusOut);\n        registerEventHandler(element, \"focusout\", handleElementFocusOut); // For IE\n    },\n    update: function (element, valueAccessor) {\n        var value = !!unwrap(valueAccessor());\n        if (!element[hasfocusUpdatingProperty] && element[hasfocusLastValue] !== value) {\n            value ? element.focus() : element.blur();\n            // In IE, the blur method doesn't always cause the element to lose focus (for example, if the window is not in focus).\n            // Setting focus to the body element does seem to be reliable in IE, but should only be used if we know that the current\n            // element was focused already.\n            if (!value && element[hasfocusLastValue]) {\n                element.ownerDocument.body.focus();\n            }\n            // For IE, which doesn't reliably fire \"focus\" or \"blur\" events synchronously\n            dependencyDetection.ignore(triggerEvent, null, [element, value ? \"focusin\" : \"focusout\"]);\n        }\n    }\n};\n\nvar html = {\n    init: function () {\n        // Prevent binding on the dynamically-injected HTML (as developers are unlikely to expect that, and it has security implications)\n        return {\n            'controlsDescendantBindings': true\n        };\n    },\n    //\n    // Modify internal, per ko.punches and :\n    //      http://stackoverflow.com/a/15348139\n    update: function (element, valueAccessor) {\n        setHtml(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar $let = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        // Make a modified binding context, with extra properties, and apply it to descendant elements\n        var innerContext = bindingContext['extend'](valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { 'controlsDescendantBindings': true };\n    },\n    allowVirtualElements: true\n};\n\nvar hasDomDataExpandoProperty = '__ko__hasDomDataOptionValue__';\n// Normally, SELECT elements and their OPTIONs can only take value of type 'string' (because the values\n// are stored on DOM attributes). ko.selectExtensions provides a way for SELECTs/OPTIONs to have values\n// that are arbitrary objects. This is very convenient when implementing things like cascading dropdowns.\nvar selectExtensions = {\n    optionsValueDomDataKey: undefined,\n    readValue: function (element) {\n        switch (tagNameLower(element)) {\n            case 'option':\n                if (element[hasDomDataExpandoProperty] === true)\n                    return domData.get(element, selectExtensions.optionValueDomDataKey);\n                return element.value;\n            case 'select':\n                return element.selectedIndex >= 0 ? selectExtensions.readValue(element.options[element.selectedIndex]) : undefined;\n            default:\n                return element.value;\n        }\n    },\n    writeValue: function (element, value, allowUnset) {\n        switch (tagNameLower(element)) {\n            case 'option':\n                switch (typeof value) {\n                    case \"string\":\n                        domData.set(element, selectExtensions.optionValueDomDataKey, undefined);\n                        if (hasDomDataExpandoProperty in element) {\n                            delete element[hasDomDataExpandoProperty];\n                        }\n                        element.value = value;\n                        break;\n                    default:\n                        // Store arbitrary object using DomData\n                        domData.set(element, selectExtensions.optionValueDomDataKey, value);\n                        element[hasDomDataExpandoProperty] = true;\n                        // Special treatment of numbers is just for backward compatibility. KO 1.2.1 wrote numerical values to element.value.\n                        element.value = typeof value === \"number\" ? value : \"\";\n                        break;\n                }\n                break;\n            case 'select':\n                if (value === \"\" || value === null)\n                    value = undefined;\n                var selection = -1;\n                for (var i = 0, n = element.options.length, optionValue; i < n; ++i) {\n                    optionValue = selectExtensions.readValue(element.options[i]);\n                    // Include special check to handle selecting a caption with a blank string value\n                    if (optionValue == value || (optionValue === \"\" && value === undefined)) {\n                        selection = i;\n                        break;\n                    }\n                }\n                if (allowUnset || selection >= 0 || (value === undefined && element.size > 1)) {\n                    element.selectedIndex = selection;\n                }\n                break;\n            default:\n                if ((value === null) || (value === undefined))\n                    value = \"\";\n                element.value = value;\n                break;\n        }\n    }\n};\n\nvar captionPlaceholder = {};\nvar options$1 = {\n    init: function (element) {\n        if (tagNameLower(element) !== \"select\")\n            throw new Error(\"options binding applies only to SELECT elements\");\n        // Remove all existing <option>s.\n        while (element.length > 0) {\n            element.remove(0);\n        }\n        // Ensures that the binding processor doesn't try to bind the options\n        return { 'controlsDescendantBindings': true };\n    },\n    update: function (element, valueAccessor, allBindings) {\n        function selectedOptions() {\n            return arrayFilter(element.options, function (node) { return node.selected; });\n        }\n        var selectWasPreviouslyEmpty = element.length == 0, multiple = element.multiple, previousScrollTop = (!selectWasPreviouslyEmpty && multiple) ? element.scrollTop : null, unwrappedArray = unwrap(valueAccessor()), valueAllowUnset = allBindings.get('valueAllowUnset') && allBindings['has']('value'), includeDestroyed = allBindings.get('optionsIncludeDestroyed'), arrayToDomNodeChildrenOptions = {}, captionValue, filteredArray, previousSelectedValues = [];\n        if (!valueAllowUnset) {\n            if (multiple) {\n                previousSelectedValues = arrayMap(selectedOptions(), selectExtensions.readValue);\n            }\n            else if (element.selectedIndex >= 0) {\n                previousSelectedValues.push(selectExtensions.readValue(element.options[element.selectedIndex]));\n            }\n        }\n        if (unwrappedArray) {\n            if (typeof unwrappedArray.length == \"undefined\")\n                unwrappedArray = [unwrappedArray];\n            // Filter out any entries marked as destroyed\n            filteredArray = arrayFilter(unwrappedArray, function (item) {\n                return includeDestroyed || item === undefined || item === null || !unwrap(item['_destroy']);\n            });\n            // If caption is included, add it to the array\n            if (allBindings['has']('optionsCaption')) {\n                captionValue = unwrap(allBindings.get('optionsCaption'));\n                // If caption value is null or undefined, don't show a caption\n                if (captionValue !== null && captionValue !== undefined) {\n                    filteredArray.unshift(captionPlaceholder);\n                }\n            }\n        }\n        else {\n            // If a falsy value is provided (e.g. null), we'll simply empty the select element\n        }\n        function applyToObject(object, predicate, defaultValue) {\n            var predicateType = typeof predicate;\n            if (predicateType == \"function\")\n                return predicate(object);\n            else if (predicateType == \"string\")\n                return object[predicate];\n            else\n                return defaultValue;\n        }\n        // The following functions can run at two different times:\n        // The first is when the whole array is being updated directly from this binding handler.\n        // The second is when an observable value for a specific array entry is updated.\n        // oldOptions will be empty in the first case, but will be filled with the previously generated option in the second.\n        var itemUpdate = false;\n        function optionForArrayItem(arrayEntry, index, oldOptions) {\n            if (oldOptions.length) {\n                previousSelectedValues = !valueAllowUnset && oldOptions[0].selected ? [selectExtensions.readValue(oldOptions[0])] : [];\n                itemUpdate = true;\n            }\n            var option = element.ownerDocument.createElement(\"option\");\n            if (arrayEntry === captionPlaceholder) {\n                setTextContent(option, allBindings.get('optionsCaption'));\n                selectExtensions.writeValue(option, undefined);\n            }\n            else {\n                // Apply a value to the option element\n                var optionValue = applyToObject(arrayEntry, allBindings.get('optionsValue'), arrayEntry);\n                selectExtensions.writeValue(option, unwrap(optionValue));\n                // Apply some text to the option element\n                var optionText = applyToObject(arrayEntry, allBindings.get('optionsText'), optionValue);\n                setTextContent(option, optionText);\n            }\n            return [option];\n        }\n        // By using a beforeRemove callback, we delay the removal until after new items are added. This fixes a selection\n        // problem in IE<=8 and Firefox. See https://github.com/knockout/knockout/issues/1208\n        arrayToDomNodeChildrenOptions['beforeRemove'] =\n            function (option) {\n                element.removeChild(option);\n            };\n        function setSelectionCallback(arrayEntry, newOptions) {\n            if (itemUpdate && valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                // There is no need to use dependencyDetection.ignore since setDomNodeChildrenFromArrayMapping does so already.\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            }\n            else if (previousSelectedValues.length) {\n                // IE6 doesn't like us to assign selection to OPTION nodes before they're added to the document.\n                // That's why we first added them without selection. Now it's time to set the selection.\n                var isSelected = arrayIndexOf(previousSelectedValues, selectExtensions.readValue(newOptions[0])) >= 0;\n                setOptionNodeSelectionState(newOptions[0], isSelected);\n                // If this option was changed from being selected during a single-item update, notify the change\n                if (itemUpdate && !isSelected) {\n                    dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                }\n            }\n        }\n        var callback = setSelectionCallback;\n        if (allBindings['has']('optionsAfterRender') && typeof allBindings.get('optionsAfterRender') == \"function\") {\n            callback = function (arrayEntry, newOptions) {\n                setSelectionCallback(arrayEntry, newOptions);\n                dependencyDetection.ignore(allBindings.get('optionsAfterRender'), null, [newOptions[0], arrayEntry !== captionPlaceholder ? arrayEntry : undefined]);\n            };\n        }\n        setDomNodeChildrenFromArrayMapping(element, filteredArray, optionForArrayItem, arrayToDomNodeChildrenOptions, callback);\n        dependencyDetection.ignore(function () {\n            if (valueAllowUnset) {\n                // The model value is authoritative, so make sure its value is the one selected\n                selectExtensions.writeValue(element, unwrap(allBindings.get('value')), true /* allowUnset */);\n            }\n            else {\n                // Determine if the selection has changed as a result of updating the options list\n                var selectionChanged;\n                if (multiple) {\n                    // For a multiple-select box, compare the new selection count to the previous one\n                    // But if nothing was selected before, the selection can't have changed\n                    selectionChanged = previousSelectedValues.length && selectedOptions().length < previousSelectedValues.length;\n                }\n                else {\n                    // For a single-select box, compare the current value to the previous value\n                    // But if nothing was selected before or nothing is selected now, just look for a change in selection\n                    selectionChanged = (previousSelectedValues.length && element.selectedIndex >= 0)\n                        ? (selectExtensions.readValue(element.options[element.selectedIndex]) !== previousSelectedValues[0])\n                        : (previousSelectedValues.length || element.selectedIndex >= 0);\n                }\n                // Ensure consistency between model value and selected option.\n                // If the dropdown was changed so that selection is no longer the same,\n                // notify the value or selectedOptions binding.\n                if (selectionChanged) {\n                    triggerEvent(element, \"change\");\n                }\n            }\n        });\n        // Workaround for IE bug\n        ensureSelectElementIsRenderedCorrectly(element);\n        if (previousScrollTop && Math.abs(previousScrollTop - element.scrollTop) > 20)\n            element.scrollTop = previousScrollTop;\n    }\n};\nselectExtensions.optionValueDomDataKey = domData.nextKey();\n\nvar selectedOptions = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        registerEventHandler(element, \"change\", function () {\n            var value = valueAccessor(), valueToWrite = [];\n            arrayForEach(element.getElementsByTagName(\"option\"), function (node) {\n                if (node.selected)\n                    valueToWrite.push(selectExtensions.readValue(node));\n            });\n            valueAccessor(valueToWrite);\n        });\n    },\n    update: function (element, valueAccessor) {\n        if (tagNameLower(element) != \"select\")\n            throw new Error(\"values binding applies only to SELECT elements\");\n        var newValue = unwrap(valueAccessor()), previousScrollTop = element.scrollTop;\n        if (newValue && typeof newValue.length == \"number\") {\n            arrayForEach(element.getElementsByTagName(\"option\"), function (node) {\n                var isSelected = arrayIndexOf(newValue, selectExtensions.readValue(node)) >= 0;\n                if (node.selected != isSelected) {\n                    setOptionNodeSelectionState(node, isSelected);\n                }\n            });\n        }\n        element.scrollTop = previousScrollTop;\n    }\n};\n\nvar style = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor() || {});\n        objectForEach(value, function (styleName, styleValue) {\n            styleValue = unwrap(styleValue);\n            if (styleValue === null || styleValue === undefined || styleValue === false) {\n                // Empty string removes the value, whereas null/undefined have no effect\n                styleValue = \"\";\n            }\n            element.style[styleName] = styleValue;\n        });\n    }\n};\n\nvar submit = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        if (typeof valueAccessor() != \"function\")\n            throw new Error(\"The value for a submit binding must be a function\");\n        registerEventHandler(element, \"submit\", function (event) {\n            var handlerReturnValue;\n            var value = valueAccessor();\n            try {\n                handlerReturnValue = value.call(bindingContext['$data'], element);\n            }\n            finally {\n                if (handlerReturnValue !== true) {\n                    if (event.preventDefault)\n                        event.preventDefault();\n                    else\n                        event.returnValue = false;\n                }\n            }\n        });\n    }\n};\n\nvar text = {\n    init: function () {\n        // Prevent binding on the dynamically-injected text node (as developers are unlikely to expect that, and it has security implications).\n        // It should also make things faster, as we no longer have to consider whether the text node might be bindable.\n        return { controlsDescendantBindings: true };\n    },\n    update: function (element, valueAccessor) {\n        setTextContent(element, valueAccessor());\n    },\n    allowVirtualElements: true\n};\n\nvar parseVersion;\nvar operaVersion;\nvar userAgent;\nvar safariVersion;\nvar firefoxVersion;\nvar w = options.global;\nif (w.navigator) {\n    parseVersion = function (matches) {\n        if (matches) {\n            return parseFloat(matches[1]);\n        }\n    };\n    // Detect various browser versions because some old versions don't fully support the 'input' event\n    operaVersion = w.opera && w.opera.version && parseInt(w.opera.version()),\n        userAgent = w.navigator.userAgent,\n        safariVersion = parseVersion(userAgent.match(/^(?:(?!chrome).)*version\\/([^ ]*) safari/i)),\n        firefoxVersion = parseVersion(userAgent.match(/Firefox\\/([^ ]*)/));\n}\n// IE 8 and 9 have bugs that prevent the normal events from firing when the value changes.\n// But it does fire the 'selectionchange' event on many of those, presumably because the\n// cursor is moving and that counts as the selection changing. The 'selectionchange' event is\n// fired at the document level only and doesn't directly indicate which element changed. We\n// set up just one event handler for the document and use 'activeElement' to determine which\n// element was changed.\nif (ieVersion < 10) {\n    var selectionChangeRegisteredName = domData.nextKey(), selectionChangeHandlerName = domData.nextKey();\n    var selectionChangeHandler = function (event) {\n        var target = this.activeElement, handler = target && domData.get(target, selectionChangeHandlerName);\n        if (handler) {\n            handler(event);\n        }\n    };\n    var registerForSelectionChangeEvent = function (element, handler) {\n        var ownerDoc = element.ownerDocument;\n        if (!domData.get(ownerDoc, selectionChangeRegisteredName)) {\n            domData.set(ownerDoc, selectionChangeRegisteredName, true);\n            registerEventHandler(ownerDoc, 'selectionchange', selectionChangeHandler);\n        }\n        domData.set(element, selectionChangeHandlerName, handler);\n    };\n}\nvar textInput = {\n    aliases: 'textinput',\n    init: function (element, valueAccessor) {\n        var previousElementValue = element.value, timeoutHandle, elementValueBeforeEvent;\n        var updateModel = function (event) {\n            clearTimeout(timeoutHandle);\n            elementValueBeforeEvent = timeoutHandle = undefined;\n            var elementValue = element.value;\n            if (previousElementValue !== elementValue) {\n                // Provide a way for tests to know exactly which event was processed\n                if (options.debug && event)\n                    element['_ko_textInputProcessedEvent'] = event.type;\n                previousElementValue = elementValue;\n                valueAccessor(elementValue);\n            }\n        };\n        var deferUpdateModel = function (event) {\n            if (!timeoutHandle) {\n                // The elementValueBeforeEvent variable is set *only* during the brief gap between an\n                // event firing and the updateModel function running. This allows us to ignore model\n                // updates that are from the previous state of the element, usually due to techniques\n                // such as rateLimit. Such updates, if not ignored, can cause keystrokes to be lost.\n                elementValueBeforeEvent = element.value;\n                var handler = options.debug ? updateModel.bind(element, { type: event.type }) : updateModel;\n                timeoutHandle = safeSetTimeout(handler, 4);\n            }\n        };\n        // IE9 will mess up the DOM if you handle events synchronously which results in DOM changes (such as other bindings);\n        // so we'll make sure all updates are asynchronous\n        var ieUpdateModel = ieVersion === 9 ? deferUpdateModel : updateModel;\n        var updateView = function () {\n            var modelValue = unwrap(valueAccessor());\n            if (modelValue === null || modelValue === undefined) {\n                modelValue = '';\n            }\n            if (elementValueBeforeEvent !== undefined && modelValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateView, 4);\n                return;\n            }\n            // Update the element only if the element and model are different. On some browsers, updating the value\n            // will move the cursor to the end of the input, which would be bad while the user is typing.\n            if (element.value !== modelValue) {\n                previousElementValue = modelValue; // Make sure we ignore events (propertychange) that result from updating the value\n                element.value = modelValue;\n            }\n        };\n        var onEvent = function (event, handler) {\n            registerEventHandler(element, event, handler);\n        };\n        if (options.debug && textInput._forceUpdateOn) {\n            // Provide a way for tests to specify exactly which events are bound\n            arrayForEach(textInput._forceUpdateOn, function (eventName) {\n                if (eventName.slice(0, 5) == 'after') {\n                    onEvent(eventName.slice(5), deferUpdateModel);\n                }\n                else {\n                    onEvent(eventName, updateModel);\n                }\n            });\n        }\n        else {\n            if (ieVersion < 10) {\n                // Internet Explorer <= 8 doesn't support the 'input' event, but does include 'propertychange' that fires whenever\n                // any property of an element changes. Unlike 'input', it also fires if a property is changed from JavaScript code,\n                // but that's an acceptable compromise for this binding. IE 9 does support 'input', but since it doesn't fire it\n                // when using autocomplete, we'll use 'propertychange' for it also.\n                onEvent('propertychange', function (event) {\n                    if (event.propertyName === 'value') {\n                        ieUpdateModel(event);\n                    }\n                });\n                if (ieVersion == 8) {\n                    // IE 8 has a bug where it fails to fire 'propertychange' on the first update following a value change from\n                    // JavaScript code. It also doesn't fire if you clear the entire value. To fix this, we bind to the following\n                    // events too.\n                    onEvent('keyup', updateModel); // A single keystoke\n                    onEvent('keydown', updateModel); // The first character when a key is held down\n                }\n                if (ieVersion >= 8) {\n                    // Internet Explorer 9 doesn't fire the 'input' event when deleting text, including using\n                    // the backspace, delete, or ctrl-x keys, clicking the 'x' to clear the input, dragging text\n                    // out of the field, and cutting or deleting text using the context menu. 'selectionchange'\n                    // can detect all of those except dragging text out of the field, for which we use 'dragend'.\n                    // These are also needed in IE8 because of the bug described above.\n                    registerForSelectionChangeEvent(element, ieUpdateModel); // 'selectionchange' covers cut, paste, drop, delete, etc.\n                    onEvent('dragend', deferUpdateModel);\n                }\n            }\n            else {\n                // All other supported browsers support the 'input' event, which fires whenever the content of the element is changed\n                // through the user interface.\n                onEvent('input', updateModel);\n                if (safariVersion < 5 && tagNameLower(element) === \"textarea\") {\n                    // Safari <5 doesn't fire the 'input' event for <textarea> elements (it does fire 'textInput'\n                    // but only when typing). So we'll just catch as much as we can with keydown, cut, and paste.\n                    onEvent('keydown', deferUpdateModel);\n                    onEvent('paste', deferUpdateModel);\n                    onEvent('cut', deferUpdateModel);\n                }\n                else if (operaVersion < 11) {\n                    // Opera 10 doesn't always fire the 'input' event for cut, paste, undo & drop operations.\n                    // We can try to catch some of those using 'keydown'.\n                    onEvent('keydown', deferUpdateModel);\n                }\n                else if (firefoxVersion < 4.0) {\n                    // Firefox <= 3.6 doesn't fire the 'input' event when text is filled in through autocomplete\n                    onEvent('DOMAutoComplete', updateModel);\n                    // Firefox <=3.5 doesn't fire the 'input' event when text is dropped into the input.\n                    onEvent('dragdrop', updateModel); // <3.5\n                    onEvent('drop', updateModel); // 3.5\n                }\n            }\n        }\n        // Bind to the change event so that we can catch programmatic updates of the value that fire this event.\n        onEvent('change', updateModel);\n        computed(updateView, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n// // textinput is an alias for textInput\n// ko.bindingHandlers['textinput'] = {\n//     // preprocess is the only way to set up a full alias\n//     'preprocess': function (value, name, addBinding) {\n//         addBinding('textInput', value);\n//     }\n// };\n\nvar uniqueName = {\n    init: function (element, valueAccessor) {\n        if (valueAccessor()) {\n            var name = \"ko_unique_\" + (++uniqueName.currentIndex);\n            setElementName(element, name);\n        }\n    },\n    currentIndex: 0\n};\n\nvar value = {\n    after: ['options', 'foreach'],\n    init: function (element, valueAccessor, allBindings) {\n        // If the value binding is placed on a radio/checkbox, then just pass through to checkedValue and quit\n        if (element.tagName.toLowerCase() == \"input\" && (element.type == \"checkbox\" || element.type == \"radio\")) {\n            applyBindingAccessorsToNode(element, { 'checkedValue': valueAccessor });\n            return;\n        }\n        // Always catch \"change\" event; possibly other events too if asked\n        var eventsToCatch = [\"change\"];\n        var requestedEventsToCatch = allBindings.get(\"valueUpdate\");\n        var propertyChangedFired = false;\n        var elementValueBeforeEvent = null;\n        if (requestedEventsToCatch) {\n            if (typeof requestedEventsToCatch == \"string\")\n                requestedEventsToCatch = [requestedEventsToCatch];\n            arrayPushAll(eventsToCatch, requestedEventsToCatch);\n            eventsToCatch = arrayGetDistinctValues(eventsToCatch);\n        }\n        var valueUpdateHandler = function () {\n            elementValueBeforeEvent = null;\n            propertyChangedFired = false;\n            var modelValue = valueAccessor();\n            var elementValue = selectExtensions.readValue(element);\n            valueAccessor(elementValue);\n        };\n        // Workaround for https://github.com/SteveSanderson/knockout/issues/122\n        // IE doesn't fire \"change\" events on textboxes if the user selects a value from its autocomplete list\n        var ieAutoCompleteHackNeeded = ieVersion && element.tagName.toLowerCase() == \"input\" && element.type == \"text\"\n            && element.autocomplete != \"off\" && (!element.form || element.form.autocomplete != \"off\");\n        if (ieAutoCompleteHackNeeded && arrayIndexOf(eventsToCatch, \"propertychange\") == -1) {\n            registerEventHandler(element, \"propertychange\", function () { propertyChangedFired = true; });\n            registerEventHandler(element, \"focus\", function () { propertyChangedFired = false; });\n            registerEventHandler(element, \"blur\", function () {\n                if (propertyChangedFired) {\n                    valueUpdateHandler();\n                }\n            });\n        }\n        arrayForEach(eventsToCatch, function (eventName) {\n            // The syntax \"after<eventname>\" means \"run the handler asynchronously after the event\"\n            // This is useful, for example, to catch \"keydown\" events after the browser has updated the control\n            // (otherwise, ko.selectExtensions.readValue(this) will receive the control's value *before* the key event)\n            var handler = valueUpdateHandler;\n            if (stringStartsWith(eventName, \"after\")) {\n                handler = function () {\n                    // The elementValueBeforeEvent variable is non-null *only* during the brief gap between\n                    // a keyX event firing and the valueUpdateHandler running, which is scheduled to happen\n                    // at the earliest asynchronous opportunity. We store this temporary information so that\n                    // if, between keyX and valueUpdateHandler, the underlying model value changes separately,\n                    // we can overwrite that model value change with the value the user just typed. Otherwise,\n                    // techniques like rateLimit can trigger model changes at critical moments that will\n                    // override the user's inputs, causing keystrokes to be lost.\n                    elementValueBeforeEvent = selectExtensions.readValue(element);\n                    safeSetTimeout(valueUpdateHandler, 0);\n                };\n                eventName = eventName.substring(\"after\".length);\n            }\n            registerEventHandler(element, eventName, handler);\n        });\n        var updateFromModel = function () {\n            var newValue = unwrap(valueAccessor());\n            var elementValue = selectExtensions.readValue(element);\n            if (elementValueBeforeEvent !== null && newValue === elementValueBeforeEvent) {\n                safeSetTimeout(updateFromModel, 0);\n                return;\n            }\n            var valueHasChanged = (newValue !== elementValue);\n            if (valueHasChanged) {\n                if (tagNameLower(element) === \"select\") {\n                    var allowUnset = allBindings.get('valueAllowUnset');\n                    var applyValueAction = function () {\n                        selectExtensions.writeValue(element, newValue, allowUnset);\n                    };\n                    applyValueAction();\n                    if (!allowUnset && newValue !== selectExtensions.readValue(element)) {\n                        // If you try to set a model value that can't be represented in an already-populated dropdown, reject that change,\n                        // because you're not allowed to have a model value that disagrees with a visible UI selection.\n                        dependencyDetection.ignore(triggerEvent, null, [element, \"change\"]);\n                    }\n                    else {\n                        // Workaround for IE6 bug: It won't reliably apply values to SELECT nodes during the same execution thread\n                        // right after you've changed the set of OPTION nodes on it. So for that node type, we'll schedule a second thread\n                        // to apply the value as well.\n                        safeSetTimeout(applyValueAction, 0);\n                    }\n                }\n                else {\n                    selectExtensions.writeValue(element, newValue);\n                }\n            }\n        };\n        computed(updateFromModel, null, { disposeWhenNodeIsRemoved: element });\n    }\n};\n\nvar visible = {\n    update: function (element, valueAccessor) {\n        var value = unwrap(valueAccessor());\n        var isCurrentlyVisible = !(element.style.display == \"none\");\n        if (value && !isCurrentlyVisible)\n            element.style.display = \"\";\n        else if ((!value) && isCurrentlyVisible)\n            element.style.display = \"none\";\n    }\n};\nvar hidden = {\n    update: function (element, valueAccessor) {\n        visible.update.call(this, element, function () { return !unwrap(valueAccessor()); });\n    }\n};\n\nvar using = {\n    init: function (element, valueAccessor, allBindings, viewModel, bindingContext) {\n        var innerContext = bindingContext.createChildContext(valueAccessor);\n        applyBindingsToDescendants(innerContext, element);\n        return { controlsDescendantBindings: true };\n    },\n    allowVirtualElements: true\n};\n\nvar bindings = {\n    attr: attr,\n    checked: checked,\n    checkedValue: checkedValue,\n    click: click,\n    css: css, 'class': css,\n    enable: enable,\n    'event': eventHandler,\n    disable: disable,\n    hasfocus: hasfocus, hasFocus: hasfocus,\n    hidden: hidden,\n    html: html,\n    'let': $let,\n    on: onHandler,\n    options: options$1,\n    selectedOptions: selectedOptions,\n    style: style,\n    submit: submit,\n    text: text,\n    textInput: textInput,\n    textinput: textInput,\n    uniqueName: uniqueName,\n    using: using,\n    value: value,\n    visible: visible\n};\n\nexport { bindings };\n//# sourceMappingURL=tko.binding.core.js.map\n","import { toJS, unwrap } from 'tko.observable';\n\nvar sproto = String.prototype;\nvar filters = {};\n// Convert value to uppercase\nfilters.uppercase = function (value) {\n    return sproto.toUpperCase.call(unwrap(value));\n};\n// Convert value to lowercase\nfilters.lowercase = function (value) {\n    return sproto.toLowerCase.call(unwrap(value));\n};\n// Return default value if the input value is empty or null\nfilters['default'] = function (value, defaultValue) {\n    value = unwrap(value);\n    if (typeof value === \"function\") {\n        return value;\n    }\n    if (typeof value === \"string\") {\n        return sproto.trim.call(value) === '' ? defaultValue : value;\n    }\n    return value == null || value.length == 0 ? defaultValue : value;\n};\n// Return the value with the search string replaced with the replacement string\nfilters.replace = function (value, search, replace) {\n    return sproto.replace.call(unwrap(value), search, replace);\n};\nfilters.fit = function (value, length, replacement, trimWhere) {\n    value = unwrap(value);\n    if (length && ('' + value).length > length) {\n        replacement = '' + (replacement || '...');\n        length = length - replacement.length;\n        value = '' + value;\n        switch (trimWhere) {\n            case 'left':\n                return replacement + value.slice(-length);\n            case 'middle':\n                var leftLen = Math.ceil(length / 2);\n                return value.substr(0, leftLen) + replacement + value.slice(leftLen - length);\n            default:\n                return value.substr(0, length) + replacement;\n        }\n    }\n    else {\n        return value;\n    }\n};\n// Convert a model object to JSON\nfilters.json = function (rootObject, space, replacer) {\n    // replacer and space are optional\n    return JSON.stringify(toJS(rootObject), replacer, space);\n};\n// Format a number using the browser's toLocaleString\nfilters.number = function (value) {\n    return (+unwrap(value)).toLocaleString();\n};\n\nexport { filters };\n//# sourceMappingURL=tko.filter.punches.js.map\n","/* eslint semi: 0 */\nimport * as utils from 'tko.utils'\n\nimport {\n    // applyExtenders,\n    // arrayChangeEventName,\n    // deferUpdates,\n    dependencyDetection,\n    extenders,\n    isObservable,\n    isSubscribable,\n    isWriteableObservable,\n    observable,\n    observableArray,\n    peek,\n    subscribable,\n    toJS,\n    toJSON,\n    unwrap\n} from 'tko.observable'\n\nimport {\n    computed,\n    isComputed,\n    isPureComputed,\n    pureComputed\n} from 'tko.computed'\n\nimport { VirtualProvider } from 'tko.provider.virtual'\nimport { DataBindProvider } from 'tko.provider.databind'\nimport { ComponentProvider } from 'tko.provider.component'\nimport { AttributeProvider } from 'tko.provider.attr'\nimport { MultiProvider } from 'tko.provider.multi'\nimport {\n  TextMustacheProvider, AttributeMustacheProvider\n} from 'tko.provider.mustache'\n\nimport {\n    applyBindingAccessorsToNode,\n    applyBindings,\n    applyBindingsToDescendants,\n    applyBindingsToNode,\n    contextFor,\n    dataFor,\n    getBindingHandler,\n    BindingHandler,\n    AsyncBindingHandler,\n    setDomNodeChildrenFromArrayMapping\n} from 'tko.bind';\n\nimport {\n    bindings as coreBindings\n} from 'tko.binding.core';\n\nimport {\n    anonymousTemplate,\n    bindings as templateBindings,\n    domElement,\n    nativeTemplateEngine,\n    renderTemplate,\n    setTemplateEngine,\n    templateEngine\n    // templateSources\n} from 'tko.binding.template';\n\nimport {\n    bindings as ifBindings\n} from 'tko.binding.if';\n\nimport {\n    bindings as foreachBindings\n} from 'tko.binding.foreach';\n\nimport {\n  filters as punchesFilters\n} from 'tko.filter.punches';\n\nimport {\n  bindings as componentBindings\n} from 'tko.binding.component'\n\nimport components from 'tko.utils.component'\n\nvar coreUtils = {}\n\nutils.arrayForEach([\n  'extend',\n  'setTimeout',\n  'arrayForEach',\n  'arrayFirst',\n  'arrayFilter',\n  'arrayGetDistinctValues',\n  'arrayIndexOf',\n  'arrayMap',\n  'arrayPushAll',\n  'arrayRemoveItem',\n  'getFormFields',\n  'peekObservable',\n  'postJson',\n  'parseJson',\n  'registerEventHandler',\n  'stringifyJson',\n  'range',\n  'toggleDomNodeCssClass',\n  'triggerEvent',\n  'unwrapObservable',\n  'objectForEach',\n  'addOrRemoveItem',\n  'setTextContent',\n  'domData',\n  'parseHtmlFragment',\n  'setHtml',\n  'compareArrays',\n  'setDomNodeChildrenFromArrayMapping'\n], function (coreUtil) {\n  coreUtils[coreUtil] = utils[coreUtil]\n})\n\ncoreUtils.domNodeDisposal = {\n  addDisposeCallback: utils.addDisposeCallback,\n  otherNodeCleanerFunctions: utils.otherNodeCleanerFunctions,\n  removeDisposeCallback: utils.removeDisposeCallback,\n  removeNode: utils.removeNode\n}\n\nutils.extend(coreUtils, {\n  setDomNodeChildrenFromArrayMapping: setDomNodeChildrenFromArrayMapping,\n  unwrapObservable: unwrap,\n  peekObservable: peek\n})\n\n// Create the binding provider and default bindings.\nconst provider = new MultiProvider({\n  globals: utils.options.bindingGlobals,\n  providers: [\n    new AttributeMustacheProvider(),\n    new TextMustacheProvider(),\n    new ComponentProvider(),\n    new DataBindProvider(),\n    new VirtualProvider(),\n    new AttributeProvider()\n  ]\n})\n\nutils.options.bindingProviderInstance = provider\n\nprovider.bindingHandlers.set(coreBindings)\nprovider.bindingHandlers.set(templateBindings)\nprovider.bindingHandlers.set(ifBindings)\nprovider.bindingHandlers.set(foreachBindings)\nprovider.bindingHandlers.set({ each: foreachBindings.foreach })\nprovider.bindingHandlers.set(componentBindings)\n\nObject.assign(utils.options.filters, punchesFilters);\n\n// Expose the API.\nexport default {\n    // --- Top-level ---\n  version: '{{VERSION}}',\n  options: utils.options,\n\n  extenders: extenders,\n  filters: utils.options.filters,\n  Component: components.ComponentABC,\n\n    // --- Utilities ---\n  cleanNode: utils.cleanNode,\n  memoization: utils.memoization,\n  removeNode: utils.removeNode,\n  tasks: utils.tasks,\n  utils: coreUtils,\n  dependencyDetection,\n  ignoreDependencies: dependencyDetection.ignore,\n\n    // -- Observable ---\n  isObservable,\n  isSubscribable,\n  isWriteableObservable,\n  isWritableObservable: isWriteableObservable,\n  observable,\n  observableArray,\n  peek,\n  subscribable,\n  unwrap,\n  toJS,\n  toJSON,\n\n    // ... 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\ No newline at end of file

From dd0aafcca6cd0cac5a2d2d1acc041c4d69740d38 Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 22:57:57 -0500
Subject: [PATCH 19/20] Update repo usage in README

---
 README.md    | 12 ++++++------
 package.json |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 0ab67006..7f4cf8b3 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,12 @@
 
 To install use one of the usual package managers e.g.
 
-- $ `yarn install tko`
+- $ `yarn add tko`
 - $ `npm install tko`
 
 By CDN
 
-- Latest: https://unpkg.com/tko/dist/ko.js
+- Latest: https://unpkg.com/tko/packages/tko/dist/tko.js
 
 ### Using the Monorepo
 
@@ -35,12 +35,12 @@ The following commands are to get the build system set up. *Note:* you need to h
 | ------- | ------ |
 | $ `git clone git@github.com:knockout/tko` | Clone the repository.
 | $ `npm install -g yarn` otherwise | Ensure yarn is globally available
-| $ `yarn` | Install local node packages
-| $ `yarn run lerna` | Link local `packages/` to each other
+| $ `yarn` | Install local node packages and link tko modules
 | $ `yarn test` | Run all tests
-| $ `yarn run build` | Make the `dist/ko[.es6].js` files, where the `.es6` version has not been passed through Babel
+| $ `yarn build` | Build tko\[.module\]\[.es6\]\[.min\].js files, where `.es6` version has not been transpiled
+| $ `lerna publish` | Bump versions and publish to npm registry
 
-Checkout `package.json` for more script commands that can be executed with `yarn run {command}`.
+Checkout `package.json => scripts` for more commands that can be executed with `yarn {command}`.
 
 In each individual `packages/*/` directory, you can also run (presuming `rollup` and `karma` are installed globally):
 
diff --git a/package.json b/package.json
index cefd943f..2003295b 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "scripts": {
     "postinstall": "lerna bootstrap --hoist --npm-client yarn",
-    "prepublish": "npm run build",
+    "prepublish": "yarn build",
     "test": "lerna exec --concurrency=1 --loglevel=warn -- karma start ../../karma.conf.js --once",
     "build": "lerna exec --concurrency=1 --loglevel=warn -- rollup -c ../../rollup.config.js",
     "lint": "standard"

From 1ad236db7ca37e39de89795a5b754c1d62fd7e6e Mon Sep 17 00:00:00 2001
From: Casey Webb <notcaseywebb@gmail.com>
Date: Sat, 14 Oct 2017 23:03:33 -0500
Subject: [PATCH 20/20] Fix CDN link(s) in README

---
 README.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7f4cf8b3..0400f968 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,8 @@ To install use one of the usual package managers e.g.
 
 By CDN
 
-- Latest: https://unpkg.com/tko/packages/tko/dist/tko.js
+- Stable: https://unpkg.com/tko/dist/tko[.es6][.min].js
+- Latest (development only): https://rawgit.com/knockout/tko/master/packages/tko/dist/tko[.es6][.min].js
 
 ### Using the Monorepo