我有一个 AngularDart 应用程序，可以在 Chromium 和 Chrome 上使用 Javascript 运行良好。但在 Firefox 和 IE 中，我收到以下错误：
[14:36:14.648] "NullError: receiver.webkitCreateShadowRoot is undefined
STACKTRACE:
.Element.createShadowRoot$0@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:84445
J.createShadowRoot$0$x@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:153659
._ComponentFactory.call$6@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:11337
.BlockFactory__instantiateDirectives__closure2.call$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:11097
.Primitives_applyFunction@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:5148
._FactoryProvider.get$2@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:125034
J.get$2$x@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:153716
.DynamicInjector__getInstanceBySymbol_closure.call$0@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:124806
._defaultCreationStrategy@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:125162
.Binding.creationStrategy$3@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:125271
.DynamicInjector._getInstanceBySymbol$2@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:124652
.DynamicInjector.get$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:124694
J.get$1$x@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:153713
.BlockFactory__instantiateDirectives_closure3.call$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:11183
.IterableMixinWorkaround_forEach@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:22126
.JSArray.forEach$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:1995
J.forEach$1$ax@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:153707
.BlockFactory._instantiateDirectives$5@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10887
.BlockFactory._dom$_link$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10816
.BlockFactory._dom$_link$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10818
.BlockFactory._dom$_link$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10818
.BlockFactory._dom$_link$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10818
.BlockFactory.call$2@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10776
.ngBootstrap_closure0.call$0@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:7661
._rootRun@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:27183
._ZoneDelegate.run$2@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:34652
.NgZone__onRun_closure.call$0@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10306
.NgZone._onRunBase$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10162
.NgZone._onRun$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:10181
$$.BoundClosure$4<.call$4@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:424
._ZoneDelegate.run$2@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:34652
._CustomizedZone.run$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:35046
.ngBootstrap@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:7485
.main@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:130170
._IsolateContext.eval$1@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:3635
.startRootIsolate@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:3301
@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:161315
@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:161295
@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:161309
@http://127.0.0.1:3030/foobarUI/web/foobarui.dart.js:9
"
这是我的 foobarUI/pubspec.yaml：
name: foobarUI
description: A sample web application
dependencies:
angular: 0.9.3
browser: any
json_object: any
petitparser: any
unittest: any
foobar:
path: ../foobarLib
我尝试添加 js、shadow_dom 和 web_ui 模块，但没有任何区别。
我试图添加“useShadowDom = true;” （和错误）到主 dart 文件，没有区别。
从错误中，似乎很明显缺少对 DOM 影子根的 webkit 支持，但为什么这个模块不处理这个？
angular.dart.tutorial chapter_03 示例也会出现同样的错误。这显然是 Angular.Dart 的一个问题。错误归档为：https ://code.google.com/p/dart/issues/detail?id=15752