title: Primeng and Angular 2 controllers validation
body: <p>I'm new to the primeng controllers and I'm stuck on the validation of some complex controllers for example the spinner controller. I want to set this controller to required and using ReactiveFormsModule I'm able to set the proper validation. however, I noticed that although he have the angular classes like this</p>
  
  <pre><code>&lt;p-spinner formControlName="myspinner" class="ng-dirty ng-touched ng-invalid"&gt;
  </code></pre>
  
  <p>the inner input isn't affected by it, and this is a problem because the prime css is written to affect the input field.
   Is possible to resolve this by writing a little more css, but is suppose to be like this?? or am I doing something wrong?</p>