Swap the modal-dialog template based on Ember version.

addon/components/positioned-container.js

@@ -32,7 +32,7 @@ export default Ember.Component.extend({
     var alignmentTarget = this.get('alignmentTarget');
     if (Ember.typeOf(alignmentTarget) === 'string') {
       alignmentTarget = Ember.$(alignmentTarget)[0];
-    } else if (Ember.View.detectInstance(alignmentTarget)) {
+    } else if (alignmentTarget && alignmentTarget.element) {
       alignmentTarget = alignmentTarget.element;
     }
     var $alignmentTarget = Ember.$(alignmentTarget);

addon/templates/current/components/modal-dialog.hbs

@@ -0,0 +1,22 @@
+{{#ember-wormhole to=destinationElementId renderInPlace=renderInPlace}}
+  {{#if hasOverlay}}
+    <div class="{{overlayClassNamesString}} {{if translucentOverlay 'translucent'}} {{overlay-class}}" {{action 'close'}}></div>
+  {{/if}}
+  {{#if useEmberTether}}
+    {{#ember-tether classNameBindings="containerClassNamesString alignmentClass renderInPlaceClass container-class"
+        target=_alignmentTargetNormalized
+        attachment=_attachmentNormalized
+        targetAttachment=_targetAttachmentNormalized
+        targetModifier=_targetModifierNormalized
+    }}
+      {{yield}}
+    {{/ember-tether}}
+  {{else}}
+    {{#ember-modal-dialog-positioned-container classNameBindings="containerClassNamesString alignmentClass renderInPlaceClass container-class"
+        alignment=_alignmentNormalized
+        alignmentTarget=alignmentTarget
+    }}
+      {{yield}}
+    {{/ember-modal-dialog-positioned-container}}
+  {{/if}}
+{{/ember-wormhole}}

index.js

@@ -1,6 +1,23 @@
 /* jshint node: true */
 'use strict';
+var path = require('path');
+var fs = require('fs');
+
+var VersionChecker = require('ember-cli-version-checker');
 
 module.exports = {
-  name: 'ember-modal-dialog'
+  name: 'ember-modal-dialog',
+
+  treeForAddonTemplates: function treeForAddonTemplates (tree) {
+    var checker = new VersionChecker(this);
+    var dep = checker.for('ember', 'bower');
+
+    var baseTemplatesPath = path.join(this.root, 'addon/templates');
+
+    if (dep.satisfies('>= 1.13.0')) {
+      return this.treeGenerator(path.join(baseTemplatesPath, 'current'));
+    } else {
+      return this.treeGenerator(path.join(baseTemplatesPath, 'lt-1-13'));
+    }
+  }
 };

package.json

@@ -32,13 +32,14 @@
     "ember-disable-prototype-extensions": "^1.0.0",
     "ember-disable-proxy-controllers": "^1.0.0",
     "ember-export-application-global": "^1.0.2",
-    "ember-tether": "^0.1.1",
+    "ember-tether": "^0.1.3",
     "ember-try": "0.0.6",
     "glob": "4.4.0"
   },
   "dependencies": {
     "ember-cli-babel": "^5.0.0",
     "ember-cli-htmlbars": "^0.7.6",
+    "ember-cli-version-checker": "^1.1.0",
     "ember-wormhole": "^0.3.1"
   },
   "keywords": [