p.
  <span class="location-badge">exported from <a href="/angular2/forms">angular2/forms</a></span>
  defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/forms/form_builder.js#L26">angular2/src/forms/form_builder.js (line 26)</a>

:markdown
  Creates a form object from a user-specified configuration.
  
  # Example
  
  This example creates a [ControlGroup] that consists of a `login` [Control], and a nested [ControlGroup] that defines
  a `password` and a `passwordConfirmation` [Control].
  
  ```
   var loginForm = builder.group({
     login: ["", Validators.required],
  
     passwordRetry: builder.group({
       password: ["", Validators.required],
       passwordConfirmation: ["", Validators.required]
     })
   });
  
   ```
.l-main-section
  h2 Members
  .l-sub-section
    h3 array

    
    pre.prettyprint
      code.
        (controlsConfig:List, validator:Function = null)

    

    :markdown
      





  .l-sub-section
    h3 control

    
    pre.prettyprint
      code.
        (value, validator:Function = null)

    

    :markdown
      





  .l-sub-section
    h3 group

    
    pre.prettyprint
      code.
        (controlsConfig, extra = null)

    

    :markdown