title: Call a method when the value is changed using Angular 2
body: <p>How can i call a method when the value is changed using Angular 2?</p>
  
  <pre><code> &lt;select [(ngModel)]="searchMonster"&gt;
       &lt;option&gt;36&lt;/option&gt;
       &lt;option&gt;37&lt;/option&gt;
   &lt;/select&gt;
  </code></pre>
  
  <p>I tried to use ng-change but had no success.</p>