Dart 如何在polymer应用程序中实现主要功能

发布于01月08日

我想在应用程序中使用polymer 实现一个主要功能.

我try 在DART文件中实现主函数，其中实现了polymer 代码. 不执行该代码.

不允许在主函数中包含第二个DART脚本-

我的错误在哪里？ TNX云母.

推荐答案

index.html个

 <head>
   <!-- <link rel="import" href="packages/polymer/polymer.html"> not necessary anymore (only in elements)-->
   <!-- <script src="packages/web_components/platform.js"></script>
        not necessary anymore with Polymer >= 0.14.0 -->
   <!-- <script src="packages/web_components/dart_support.js"></script> 
        not necessary anymore with Polymer >= 0.15.0 -->

   <!-- old -->
   <script type="application/dart">
      export 'package:polymer/init.dart';</script> 

   <!-- new  -->
   <script type="application/dart">export 'index.dart';</script>
 </head>
 <body>
   ...
   <!-- ... when you use a custom main method (see https://code.google.com/p/dart/issues/detail?id=17546#c16) -->
   <script type="application/dart" src="index.dart"></script>
 </body>

index.dart

Polymer 0.17.0(Polymer.js 1.0)

main() async {
  await initPolymer();
  // Any other code here.
}

Before Polymer 0.17.0个

polymer 0.16.1引入了更简单的初始化方式. 使用带有@whenPolymerReady注释方法而不是main()

// >= Polymer 0.16.1
import 'package:polymer/polymer.dart';
export 'package:polymer/init.dart';

@whenPolymerReady
void onReady() {
  /// Custom setup code here.
}

Before Polymer.dart 0.16.1个

// >= Polymer 0.16.0
import "package:polymer/polymer.dart";

main() {
  initPolymer().then((zone) => zone.run(() {
    // code here works most of the time
    Polymer.onReady.then((_) {     
      // some things must wait until onReady callback is called
      // for an example look at the discussion linked below
    });
  }));
}

有关更多详细信息，请查看Polmer 0.16.0的更改日志(log)，地址为 https://pub.dartlang.org/packages/polymer个

Before Polymer 0.16.0

// < Polymer 0.16.0    
import "package:polymer/polymer.dart";

main() {
  initPolymer().run(() {
    // code here works most of the time
    Polymer.onReady.then((_) {     
      // some things must wait until onReady callback is called
      // for an example look at the discussion linked below
    });
  });
}

simple tooltip working in dartium, not as javascript个