title: How to put background image in angular 2
body: <p>I tried putting background url for my image</p>
  
  <pre><code> &lt;div  [ngStyle]="{'background-image': 'url(' + https://s3-us-west-2.amazonaws.com/mysite/l/{{event.photo}} + ')'}"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>I am getting this error</p>
  
  <pre><code>Parser Error: Got interpolation ({{}}) where expression was expected 
  </code></pre>
  
  <p>Can anyone please hepl me.Thanks.</p>