title: How add class to parent in angular application?
body: <p>I have next HTML</p>
  
  <pre><code>// This is parent
  &lt;div class="some-class"&gt;
       // This is child
       &lt;totalizer&lt;/totalizer&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>How can I change parents style ( add new class ) from child?</p>