我在将 web_ui 添加到现有的 dart 应用程序时遇到问题。
我什至没有将任何 webui 特定代码添加到我的 html 文件中，我只是尝试构建。
我将 web_ui 添加到 pubspec.yaml 并运行 pub install。
当我运行 build.dart 文件时，它会生成：
Uncaught Error: type 'AttributeName' is not a subtype of type 'String' of 'name'.
这就是我的 build.dart 文件的样子（它位于我项目的根目录中）：
import 'package:web_ui/component_build.dart';
import 'dart:io';
void main() {
build(new Options().arguments, ['bin/mywebpage.html']);
}
另外值得注意的是，我尝试了他们自动生成的 webUI 示例并且它有效，我只是无法将其添加到我现有的项目中。
EDIT:
是的，通常是index.html，但这没有什么区别。我确实尝试过改变它。
我正在运行最新版本的 Dart M4。
当我在 Dartium 中运行 mywebpage.html 时，我没有收到任何错误，但 {{data Value}} 没有替换为其相应的数据。
Dart 编辑器版本 0.4.7_r21658
Dart SDK版本0.4.7.5_r21658
这就是我得到的所有信息，有趣的是clipPath并不意外，它正在关闭打开的clipPath标签：
warning bin/mywebsite.html:86:3: Unexpected end tag (clippath). Ignored.
</clipPath>
^^^^^^^^^^^
warning bin/mywebsite.html:99:3: Unexpected end tag (clippath). Ignored.
</clipPath>
^^^^^^^^^^^
Uncaught Error: type 'AttributeName' is not a subtype of type 'String' of 'name'.
Stack Trace:
#0 _Analyzer.visitAttribute (package:web_ui/src/analyzer.dart:403:48)
#1 _Analyzer.visitElementInfo.<anonymous closure> (package:web_ui/src/analyzer.dart:157:53)
#2 LinkedHashMap.forEach (dart:collection-patch:241:13)
#3 _Analyzer.visitElementInfo (package:web_ui/src/analyzer.dart:157:28)
#4 _Analyzer.visitElement (package:web_ui/src/analyzer.dart:123:21)
#5 TreeVisitor.visit (package:html5lib/dom_parsing.dart:15:50)
#6 TreeVisitor.visitChildren (package:html5lib/dom_parsing.dart:27:49)
#7 TreeVisitor.visitNodeFallback (package:html5lib/dom_parsing.dart:35:48)
#8 TreeVisitor.visitElement (package:html5lib/dom_parsing.dart:44:50)
#9 _Analyzer.visitElementInfo (package:web_ui/src/analyzer.dart:175:23)
#10 _Analyzer.visitElement (package:web_ui/src/analyzer.dart:123:21)
#11 TreeVisitor.visit (package:html5lib/dom_parsing.dart:15:50)
#12 TreeVisitor.visitChildren (package:html5lib/dom_parsing.dart:27:49)
#13 TreeVisitor.visitNodeFallback (package:html5lib/dom_parsing.dart:35:48)
#14 TreeVisitor.visitElement (package:html5lib/dom_parsing.dart:44:50)
#15 _Analyzer.visitElementInfo (package:web_ui/src/analyzer.dart:175:23)
#16 _Analyzer.visitElement (package:web_ui/src/analyzer.dart:123:21)
#17 TreeVisitor.visit (package:html5lib/dom_parsing.dart:15:50)
#18 TreeVisitor.visitChildren (package:html5lib/dom_parsing.dart:27:49)
#19 TreeVisitor.visitNodeFallback (package:html5lib/dom_parsing.dart:35:48)
#20 TreeVisitor.visitElement (package:html5lib/dom_parsing.dart:44:50)
#21 _Analyzer.visitElementInfo (package:web_ui/src/analyzer.dart:175:23)
#22 _Analyzer.visitElement (package:web_ui/src/analyzer.dart:123:21)
#23 TreeVisitor.visit (package:html5lib/dom_parsing.dart:15:50)
#24 TreeVisitor.visitChildren (package:html5lib/dom_parsing.dart:27:49)
#25 TreeVisitor.visitNodeFallback (package:html5lib/dom_parsing.dart:35:48)
#26 TreeVisitor.visitDocument (package:html5lib/dom_parsing.dart:37:52)
#27 TreeVisitor.visit (package:html5lib/dom_parsing.dart:19:52)
#28 analyzeFile (package:web_ui/src/analyzer.dart:63:17)
#29 Compiler._analyze.<anonymous closure> (package:web_ui/src/compiler.dart:512:24)
#30 time (package:web_ui/src/utils.dart:46:24)
#31 Compiler._time (package:web_ui/src/compiler.dart:714:16)
#32 Compiler._analyze (package:web_ui/src/compiler.dart:511:14)
#33 Compiler.run.<anonymous closure> (package:web_ui/src/compiler.dart:110:15)
#34 _ThenFuture._sendValue (dart:async:397:24)
#35 _FutureImpl._setValue (dart:async:294:26)
#36 _CompleterImpl.complete (dart:async:129:21)
#37 FutureGroup.add.<anonymous closure> (package:web_ui/src/utils.dart:141:28)
#38 _ThenFuture._sendValue (dart:async:397:24)
#39 _FutureImpl._setValue (dart:async:294:26)
#40 _FutureImpl._setOrChainValue (dart:async:371:16)
#41 _ThenFuture._sendValue (dart:async:403:21)
#42 _FutureImpl._setValue (dart:async:294:26)
#43 _CatchErrorFuture._sendValue (dart:async:415:14)
#44 _FutureImpl._setValue (dart:async:294:26)
#45 _FutureImpl._setOrChainValue (dart:async:371:16)
#46 _ThenFuture._sendValue (dart:async:403:21)
#47 _FutureImpl._setValue (dart:async:294:26)
#48 _FutureImpl._setOrChainValue (dart:async:371:16)
#49 _ThenFuture._sendValue (dart:async:403:21)
#50 _FutureImpl._setValue (dart:async:294:26)
#51 _FutureListenerWrapper._sendValue (dart:async:157:21)
#52 _FutureImpl._setValue (dart:async:294:26)
#53 _FutureListenerWrapper._sendValue (dart:async:157:21)
#54 _FutureImpl._setValue (dart:async:294:26)
#55 _FutureImpl._setOrChainValue (dart:async:371:16)
#56 _ThenFuture._sendValue (dart:async:403:21)
#57 _FutureImpl._setValue (dart:async:294:26)
#58 _FutureListenerWrapper._sendValue (dart:async:157:21)
#59 _FutureImpl._setValue (dart:async:294:26)
#60 _FutureImpl._setOrChainValue (dart:async:371:16)
#61 _ThenFuture._sendValue (dart:async:403:21)
#62 _FutureImpl._setValue (dart:async:294:26)
#63 _CompleterImpl.complete (dart:async:129:21)
#64 _SendPortImpl.call.<anonymous closure> (dart:isolate-patch:106:27)
#65 _ReceivePortImpl._handleMessage (dart:isolate-patch:81:92)
Unhandled exception:
_FutureImpl._scheduleUnhandledError.<anonymous closure> (dart:async:325:9)
#1 Timer.run.<anonymous closure> (dart:async:2240:21)
#2 Timer.run.<anonymous closure> (dart:async:2248:13)
#3 Timer.Timer.<anonymous closure> (dart:async-patch:15:15)
#4 _Timer._createTimerHandler._handleTimeout (dart:io:6721:28)
#5 _Timer._createTimerHandler._handleTimeout (dart:io:6729:7)
#6 _Timer._createTimerHandler.<anonymous closure> (dart:io:6737:23)
#7 _ReceivePortImpl._handleMessage (dart:isolate-patch:81:92)
此错误消息是由于 web-ui 库未能进行类型检查而导致的。它期待一个字符串，但得到一个属性名 https://github.com/dart-lang/html5lib/blob/master/lib/dom.dart从 html5lib 返回的类。
看到这个issue https://github.com/dart-lang/web-ui/issues/484。您是否在 html - svg 中使用 xmlns 属性？
您也可以在web-ui 邮件列表 https://groups.google.com/a/dartlang.org/forum/#!forum/web-ui, or 提交错误报告 https://github.com/dart-lang/web-ui/issues.
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