title: How to trigger Angular 2 input validation manually?
body: <p>I have two inputs:</p>
  <ul>
  <li>First one on which I apply my custom validator</li>
  <li>Second one which value I use in my custom validator (it is dynamic and editable)</li>
  </ul>
  <p>If I apply my custom validator on the first input, then I focus the second one and change the value - I want to force first inputs re-validation...</p>
  <p>At the moment it only re-validates first input when I change the value... Any suggestions?</p>
  <p>At the moment when I focus the first input I can access it's reference:</p>
  <pre><code>&lt;input
      name=&quot;mEnd&quot;
      class=&quot;form-control&quot;
      [(ngModel)]=&quot;endDate&quot;
         ...
      #endDateInput=&quot;ngModel&quot;
      (focus)=&quot;clog(endDateInput)&quot;
  &gt;
  </code></pre>
  <p>I wonder can I trigger re-validation using the input formControl reference methods?</p>