Test inert

fixtures/attribute-behavior/AttributeTableSnapshot.md

@@ -1,4 +1,4 @@
-## `about` (on `<div>` inside `<div>`)
+## `about` (on `<div>` inside `<div>`)
 | Test Case | Flags | Result |
 | --- | --- | --- |
 | `about=(string)`| (changed)| `"a string"` |
@@ -5423,6 +5423,31 @@
 | `in=(null)`| (initial)| `<null>` |
 | `in=(undefined)`| (initial)| `<null>` |
 
+## `inert` (on `<div>` inside `<div>`)
+| Test Case | Flags | Result |
+| --- | --- | --- |
+| `inert=(string)`| (changed)| `<boolean: true>` |
+| `inert=(empty string)`| (changed)| `<boolean: true>` |
+| `inert=(array with string)`| (changed)| `<boolean: true>` |
+| `inert=(empty array)`| (changed)| `<boolean: true>` |
+| `inert=(object)`| (changed)| `<boolean: true>` |
+| `inert=(numeric string)`| (changed)| `<boolean: true>` |
+| `inert=(-1)`| (changed)| `<boolean: true>` |
+| `inert=(0)`| (changed)| `<boolean: true>` |
+| `inert=(integer)`| (changed)| `<boolean: true>` |
+| `inert=(NaN)`| (changed, warning)| `<boolean: true>` |
+| `inert=(float)`| (changed)| `<boolean: true>` |
+| `inert=(true)`| (initial, warning)| `<boolean: false>` |
+| `inert=(false)`| (initial, warning)| `<boolean: false>` |
+| `inert=(string 'true')`| (changed)| `<boolean: true>` |
+| `inert=(string 'false')`| (changed)| `<boolean: true>` |
+| `inert=(string 'on')`| (changed)| `<boolean: true>` |
+| `inert=(string 'off')`| (changed)| `<boolean: true>` |
+| `inert=(symbol)`| (initial, warning)| `<boolean: false>` |
+| `inert=(function)`| (initial, warning)| `<boolean: false>` |
+| `inert=(null)`| (initial)| `<boolean: false>` |
+| `inert=(undefined)`| (initial)| `<boolean: false>` |
+
 ## `in2` (on `<feBlend>` inside `<svg>`)
 | Test Case | Flags | Result |
 | --- | --- | --- |

fixtures/attribute-behavior/src/attributes.js

@@ -969,6 +969,7 @@ const attributes = [
     containerTagName: 'svg',
     tagName: 'feBlend',
   },
+  {name: 'inert'},
   {
     name: 'in2',
     read: getSVGProperty('in2'),