angular-docs-cn/public/docs/js/latest/api/router/CanReuse-interface.jade

p.location-badge.
  exported from <a href='../router'>angular2/router</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.34/modules/angular2/src/router/interfaces.ts#L87-L115">angular2/src/router/interfaces.ts (line 87)</a>

:markdown
  Defines route lifecycle method [canReuse], which is called by the router to determine whether a
  component should be reused across routes, or whether to destroy and instantiate a new component.
  
  If `canReuse` returns or resolves to `true`, the component instance will be reused.
  
  If `canReuse` throws or rejects, the navigation will be cancelled.
  
  ## Example
  ```
  @Directive({
    selector: 'my-cmp'
  })
  class MyCmp implements CanReuse, OnReuse {
    canReuse(next, prev) {
      return next.params.id == prev.params.id;
    }
  
    onReuse(next, prev) {
      this.id = next.params.id;
    }
  }
   ```
  
  
.l-main-section
  h2 Members
  .l-sub-section
    h3 canReuse

    
    pre.prettyprint
      code.
        canReuse(nextInstruction: ComponentInstruction, prevInstruction: ComponentInstruction)
    
    :markdown