p.location-badge.
  exported from <a href='../change_detection'>angular2/change_detection</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.34/modules/angular2/src/change_detection/pipe_transform.ts#L16-L39">angular2/src/change_detection/pipe_transform.ts (line 16)</a>

:markdown
  An interface that stateful pipes should implement.
  
  #Example
  
  ```
  class StatefulPipe implements PipeTransform, PipeOnDestroy {
   connection;
  
   onDestroy() {
     this.connection.release();
   }
  
   transform(value, args = []) {
     this.connection = createConnection();
     // ...
     return someValue;
   }
  }
  ```
  
  
.l-main-section
  h2 Members
  .l-sub-section
    h3 onDestroy

    
    pre.prettyprint
      code.
        onDestroy()
    
    :markdown