title: In Angular ngClass can we combine more than one conditions?
body: <p><code>[ngClass]="{'hasDocument': item.communication_file != '', 'no_Doc': item.communication_file == '' }"&gt;</code></p>
  
  <p>For example, how to do the following?</p>
  
  <p><code>[ngClass]="{'hasDocument': item.communication_file != '' &amp;&amp; item.communication_file != null, 'no_Doc': item.communication_file == '' }"&gt;</code></p>
  
  <p>Is it possible to do so? If yes, what is the correct syntax?</p>