p.location-badge.
  exported from <a href='../lifecycle_hooks'>angular2/lifecycle_hooks</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.37/modules/angular2/src/core/compiler/interfaces.ts#L72-L93">angular2/src/core/compiler/interfaces.ts (line 72)</a>

:markdown
  Overrides the default change detection.
  
  `doCheck()` gets called to check the changes in the directives instead of the default
  change detection mechanism.
  
  It is invoked every time the change detection is triggered.
  
  ## Example
  
  ```
  @Component(...)
  class MyComponent implements DoCheck {
    doCheck(): void {
      // Custom logic to detect changes
    }
  }
   ```
  
  
.l-main-section
  h2 Members
  .l-sub-section
    h3#doCheck doCheck

    
    pre.prettyprint
      code.
        doCheck()
    
    :markdown