angular-docs-cn/public/docs/js/latest/api/pipes/PromisePipe-class.jade

p.location-badge.
  exported from <a href='../pipes'>angular2/pipes</a>
  defined in <a href="https://github.com/angular/angular/tree/3a0410a/modules/angular2/src/change_detection/pipes/promise_pipe.ts#L4-L76">angular2/src/change_detection/pipes/promise_pipe.ts (line 4)</a>

:markdown
  Implements async bindings to Promise.
  
  # Example
  
  In this example we bind the description promise to the DOM.
  The async pipe will convert a promise to the value with which it is resolved. It will also
  request a change detection check when the promise is resolved.
  
   ```
  @Component({
    selector: "task-cmp",
    changeDetection: ON_PUSH
  })
  @View({
    template: "Task Description {{ description | async }}"
  })
  class Task {
    description:Promise<string>;
  }
  
  ```
  
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  h2 Members
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    h3 constructor

    
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      code.
        constructor(_ref: ChangeDetectorRef)
    
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    h3 supports

    
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      code.
        supports(promise)
    
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    h3 onDestroy

    
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      code.
        onDestroy()
    
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    h3 transform

    
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      code.
        transform(promise: Promise&lt;any&gt;)
    
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