| // Prevent polyfilled JS Shadow DOM in Dartium |
| // We need this if we want Dart code to be able to interoperate with Polymer.js |
| // code that also uses Shadow DOM. |
| // TODO(jmesserly): we can remove this code once platform.js is correctly |
| // feature detecting Shadow DOM in Dartium. |
| if (navigator.userAgent.indexOf('(Dart)') !== -1) { |
| window.Platform = window.Platform || {}; |
| Platform.flags = Platform.flags || {}; |
| Platform.flags.shadow = 'native'; |
| |
| // Note: Dartium 34 hasn't turned on the unprefixed Shadow DOM |
| // (this happens in Chrome 35), so unless "enable experimental platform |
| // features" is enabled, things will break. So we expose them as unprefixed |
| // names instead. |
| var proto = Element.prototype; |
| if (!proto.createShadowRoot) { |
| proto.createShadowRoot = proto.webkitCreateShadowRoot; |
| |
| Object.defineProperty(proto, 'shadowRoot', { |
| get: function() { |
| return this.webkitShadowRoot; |
| }, |
| set: function(value) { |
| this.webkitShadowRoot = value; |
| }, |
| configurable: true |
| }); |
| } |
| } |
