title: How to know if there are child divs hidden by overflow: hidden in Angular6
body: <p>Here is the problem I want to solve.</p>
  
  <pre><code> &lt;div class="row" style="overflow:hidden;"&gt;
      &lt;app-car
        *ngFor="let car of cars; trackBy: trackByFunction"
        [car]="car"
      &gt;
      &lt;/app-car&gt;
   &lt;/div&gt;
  
   &lt;button&gt; More &lt;button&gt;
  </code></pre>
  
  <p>I want to show the more button if there are cars hidden by the overflow:hidden property of the parent.</p>