title: How to trigger a new window to be opened from a button click in Angular 2
body: <p>I have a button and on click of that button a new window should be opened with a new provided URL.
  For example: </p>
  
  <pre><code>&lt;button class="btn btn-help"(click)="helpWindow($event)" type="submit"&gt;&lt;/button&gt; 
  </code></pre>
  
  <p>How do I handle this even at backend in the typescript file? I will get the URL from REST API and I want to open a new window with that link</p>