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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 /** Dart APIs for interacting with the JavaScript Custom Elements polyfill. */ | 5 /** Dart APIs for interacting with the JavaScript Custom Elements polyfill. */ |
6 library web_components.polyfill; | 6 library web_components.polyfill; |
7 | 7 |
8 import 'dart:async'; | 8 import 'dart:async'; |
9 import 'dart:html'; | 9 import 'dart:html'; |
10 import 'dart:js' as js; | 10 import 'dart:js' as js; |
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31 // have native document.register and therefore the browser took care of it. | 31 // have native document.register and therefore the browser took care of it. |
32 // Otherwise return false, including the case where we can't find the polyfill. | 32 // Otherwise return false, including the case where we can't find the polyfill. |
33 bool get _isReady { | 33 bool get _isReady { |
34 // If we don't have dart:js, assume things are ready | 34 // If we don't have dart:js, assume things are ready |
35 if (js.context == null) return true; | 35 if (js.context == null) return true; |
36 | 36 |
37 var customElements = js.context['CustomElements']; | 37 var customElements = js.context['CustomElements']; |
38 if (customElements == null) { | 38 if (customElements == null) { |
39 // Return true if native document.register, otherwise false. | 39 // Return true if native document.register, otherwise false. |
40 // (Maybe the polyfill isn't loaded yet. Wait for it.) | 40 // (Maybe the polyfill isn't loaded yet. Wait for it.) |
41 return document.supportsRegister; | 41 return document.supportsRegisterElement; |
42 } | 42 } |
43 | 43 |
44 return customElements['ready'] == true; | 44 return customElements['ready'] == true; |
45 } | 45 } |
46 | 46 |
47 /** | 47 /** |
48 * *Note* this API is primarily intended for tests. In other code it is better | 48 * *Note* this API is primarily intended for tests. In other code it is better |
49 * to write it in a style that works with or without the polyfill, rather than | 49 * to write it in a style that works with or without the polyfill, rather than |
50 * using this method. | 50 * using this method. |
51 * | 51 * |
52 * Synchronously trigger evaluation of pending lifecycle events, which otherwise | 52 * Synchronously trigger evaluation of pending lifecycle events, which otherwise |
53 * need to wait for a [MutationObserver] to signal the changes in the polyfill. | 53 * need to wait for a [MutationObserver] to signal the changes in the polyfill. |
54 * This method can be used to resolve differences in timing between native and | 54 * This method can be used to resolve differences in timing between native and |
55 * polyfilled custom elements. | 55 * polyfilled custom elements. |
56 */ | 56 */ |
57 void customElementsTakeRecords([Node node]) { | 57 void customElementsTakeRecords([Node node]) { |
58 var customElements = js.context['CustomElements']; | 58 var customElements = js.context['CustomElements']; |
59 if (customElements == null) return; | 59 if (customElements == null) return; |
60 customElements.callMethod('takeRecords', [node]); | 60 customElements.callMethod('takeRecords', [node]); |
61 } | 61 } |
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