ts中的父和祖先注释

时间:2015-05-10 09:01:26

标签: angular typescript

尝试将ParentAncestor注释添加到TypeScript类型中,以便我这样做:

declare module "angular2/src/core/annotations_impl/visibility"{
   function Parent():(target: any) => any;
   function Ancestor():(target: any) => any;
}

使用其中一个注释抛出"TypeError: decorator is not a function".

我正在使用alpha 22。

为什么我会收到此错误?

以下是一个示例:

/// <reference path="typings/angular2/angular2.d.ts" />
import {Component,View,bootstrap} from "angular2/angular2"
import {Ancestor,Parent} from "angular2/src/core/annotations_impl/visibility"

@Component({
    selector:"c"
})
@View({
    template:`<p>{{app.message}}</p>`
})
class C{
    app:App;
    constructor(@Ancestor() app:App){
        this.app = app;
    }
}

@Component({
    selector:"app"
})
@View({
    template:`<c></c>`,
    directives:[C]
})
class App{
    message = "test";
}
bootstrap(App);

HTML:

<html>
  <head>
    <title>Angular 2 Quickstart</title>
    <script src="https://github.jspm.io/jmcriffey/bower-traceur-runtime@0.0.89/traceur-runtime.js"></script>
    <script src="https://jspm.io/system@0.16.7.js"></script>
    <script src="https://code.angularjs.org/2.0.0-alpha.22/angular2.dev.js"></script>
  <body>
    <!-- The app component created in app.ts -->
    <app></app>
    <script>
      System.import('app');
    </script>
  </body>
</html>

1 个答案:

答案 0 :(得分:2)

对我而言,这可以通过使用您的原始表单,但在模块中声明它&#39; angular2 / annotations&#39;代替。

抱歉,我没有尝试你的例子,而是Pascal Precht的标签示例。我不确定你是否可以将App视为C的祖先,因为&#34; App被C&#34;取代。

以下适应对我有用。当B和C的定义相反时,我仍然得到你的错误,这看起来很愚蠢。

import {bootstrap, Component, View, For} from 'angular2/angular2';
import {Ancestor,Parent} from 'angular2/annotations';


@Component({
   selector:"b"
})
@View({
   template:"<content></content>"
})
class B{
   message : string = "test";
}

@Component({
   selector:"c"
})
@View({
   template:`<p>{{b.message}}</p>`
})
class C{
   b:B = null;
   constructor(@Ancestor() b:B){
      this.b = b;
   }
}



@Component({
  selector:"app"
})
@View({
   template:`
   <b>
      <c></c>
   </b>
`,
directives:[B,C]
})
class App{

}


bootstrap(App);