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1 // Prevent polyfilled JS Shadow DOM in Dartium | |
2 // We need this if we want Dart code to be able to interoperate with Polymer.js | |
3 // code that also uses Shadow DOM. | |
4 // TODO(jmesserly): we can remove this code once platform.js is correctly | |
5 // feature detecting Shadow DOM in Dartium. | |
6 if (navigator.userAgent.indexOf('(Dart)') !== -1) { | |
7 window.Platform = window.Platform || {}; | |
8 Platform.flags = Platform.flags || {}; | |
9 Platform.flags.shadow = 'native'; | |
10 | |
11 // Note: Dartium 34 hasn't turned on the unprefixed Shadow DOM | |
12 // (this happens in Chrome 35), so unless "enable experimental platform | |
13 // features" is enabled, things will break. So we expose them as unprefixed | |
14 // names instead. | |
15 var proto = Element.prototype; | |
16 if (!proto.createShadowRoot) { | |
17 proto.createShadowRoot = proto.webkitCreateShadowRoot; | |
18 | |
19 Object.defineProperty(proto, 'shadowRoot', { | |
20 get: function() { | |
21 return this.webkitShadowRoot; | |
22 }, | |
23 set: function(value) { | |
24 this.webkitShadowRoot = value; | |
25 }, | |
26 configurable: true | |
27 }); | |
28 } | |
29 } | |
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