p.location-badge.
  exported from <a href="/angular2/pipes.html">angular2/pipes</a>
  defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/change_detection/pipes/async_pipe.js#L29">angular2/src/change_detection/pipes/async_pipe.js (line 29)</a>

:markdown
  Implements async bindings to Observable.
  
  # Example
  
  In this example we bind the description observable to the DOM. The async pipe will convert an observable to the
  latest value it emitted. It will also request a change detection check when a new value is emitted.
  
   ```
  @Component({
    selector: "task-cmp",
    changeDetection: ON_PUSH
  })
  @View({
   inline: "Task Description {{description|async}}"
  })
  class Task {
   description:Observable<string>;
  }
  
  ```
  
.l-main-section
  h2 Members
  .l-sub-section
    h3 constructor

    
    pre.prettyprint
      code.
        constructor(ref:ChangeDetectorRef)
    
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  .l-sub-section
    h3 onDestroy

    
    pre.prettyprint
      code.
        onDestroy()
    
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    h3 supports

    
    pre.prettyprint
      code.
        supports(obs)
    
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    h3 transform

    
    pre.prettyprint
      code.
        transform(obs:Observable)
    
    :markdown