title: [ng-class]Add multiple classes with a single condition
body: <p>Is it possible to add <strong>multiple classes</strong> with <code>[ng-class]</code> with <strong>a single condition</strong>?</p>
  <p>Something like this:</p>
  <pre><code>&lt;div [ngClass]=&quot;Cond ? 'class1, class2' : 'class3, class4'&quot;&gt;&lt;/div&gt;
  </code></pre>