title: Angular 2 change image src attribute
body: <p>Assuming I have the following code:</p>
  
  <pre><code>&lt;img [src]="JwtService.characterImage(enemy)" 
          class="{{enemy.status}}"
      (click)="sidenav.toggle();" style="cursor:pointer"&gt;
  </code></pre>
  
  <p>How I can change this img <code>src</code> asttribute from my components <code>.ts</code> file?</p>