我正在尝试在 dart Angular2 组件中使用聚合物纸标签，但我做不到。下面的代码中我缺少什么？
在以下代码中，index.html 模板中指定的 paper-tabs 工作正常，但 main-app.html 中的 paper-tabs 格式不正确，并且在没有任何适当动画的情况下单击时会消失。
pubspec.yaml
name: tabs_test
version: 0.0.1
description: Test Paper Tabs
environment:
sdk: '>=1.13.0 <2.0.0'
dependencies:
angular2: ^2.0.0-beta.13.1
polymer: ^1.0.0-rc.16
polymer_elements: ^1.0.0-rc.8
transformers:
- polymer:
entry_points: web/index.html
- angular2:
platform_directives:
- 'package:angular2/common.dart#COMMON_DIRECTIVES'
- 'package:angular2/common.dart#FORM_DIRECTIVES'
platform_pipes:
- 'package:angular2/common.dart#COMMON_PIPES'
entry_points: web/main.dart
索引.html
<!DOCTYPE html>
<html>
<head>
<title>Tab Test</title>
<script defer src="main.dart" type="application/dart"></script>
</head>
<body>
<main-app></main-app>
<paper-tabs selected="0"> <!-- THESE WORK -->
<paper-tab>INDEX ITEM ONE</paper-tab>
<paper-tab>INDEX ITEM TWO</paper-tab>
<paper-tab>INDEX ITEM THREE</paper-tab>
</paper-tabs>
</body>
</html>
main.dart
import 'package:polymer/polymer.dart';
import 'package:angular2/platform/browser.dart';
import 'package:tabs_test/views/main_app/main_app.dart';
main() async {
await initPolymer();
bootstrap(MainApp, []);
}
main_app.dart
import 'package:angular2/angular2.dart';
import 'package:polymer_elements/paper_tabs.dart';
import 'package:polymer_elements/paper_tab.dart';
@Component(selector: 'main-app',
templateUrl: 'main_app.html',
providers: const[],
directives: const []
)
class MainApp {
MainApp() { }
}
main_app.html
<paper-tabs selected="0"> <!-- THESE DO NOT WORK -->
<paper-tab>MA ITEM ONE</paper-tab>
<paper-tab>MA ITEM TWO</paper-tab>
<paper-tab>MA ITEM THREE</paper-tab>
</paper-tabs>
