p.location-badge.
  exported from <a href='../forms'>angular2/forms</a>
  defined in <a href="https://github.com/angular/angular/tree/2.0.0-alpha.32/modules/angular2/src/forms/directives/default_value_accessor.ts#L7-L66">angular2/src/forms/directives/default_value_accessor.ts (line 7)</a>

:markdown
  The default accessor for writing a value and listening to changes that is used by the
  <a href='NgModel-class.html'><code>NgModel</code></a>, <a href='NgFormControl-class.html'><code>NgFormControl</code></a>, and <a href='NgControlName-class.html'><code>NgControlName</code></a> directives.
  
   # Example
   ```
   <input type="text" [(ng-model)]="searchQuery">
   ```
  
  
.l-main-section
  h2 Members
  .l-sub-section
    h3 constructor

    
    pre.prettyprint
      code.
        constructor(cd: NgControl, renderer: Renderer, elementRef: ElementRef)
    
    :markdown
      
      




  .l-sub-section
    h3 onChange

    
    :markdown

      
      





  .l-sub-section
    h3 onTouched

    
    :markdown

      
      





  .l-sub-section
    h3 cd

    
    :markdown

      
      





  .l-sub-section
    h3 renderer

    
    :markdown

      
      





  .l-sub-section
    h3 elementRef

    
    :markdown

      
      





  .l-sub-section
    h3 writeValue

    
    pre.prettyprint
      code.
        writeValue(value: any)
    
    :markdown

      
      





  .l-sub-section
    h3 ngClassUntouched

    
    :markdown

      
      





  .l-sub-section
    h3 ngClassTouched

    
    :markdown

      
      





  .l-sub-section
    h3 ngClassPristine

    
    :markdown

      
      





  .l-sub-section
    h3 ngClassDirty

    
    :markdown

      
      





  .l-sub-section
    h3 ngClassValid

    
    :markdown

      
      





  .l-sub-section
    h3 ngClassInvalid

    
    :markdown

      
      





  .l-sub-section
    h3 registerOnChange

    
    pre.prettyprint
      code.
        registerOnChange(fn: (_) =&gt; void)
    
    :markdown

      
      





  .l-sub-section
    h3 registerOnTouched

    
    pre.prettyprint
      code.
        registerOnTouched(fn: () =&gt; void)
    
    :markdown