title: How to bind event from child to parent component in Angular 2+ in ngSwitch
body: <p>My parent component calls the child component with a ngSwitch case:</p>
  
  <pre><code>&lt;div *ngSwitchDefault&gt;
     &lt;app-child-comp (toggleHelp)="toggleHelp($event)"&gt;&lt;/app-child-comp&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>And in the child component:</p>
  
  <pre><code>@Output() toggleHelp = new EventEmitter();
  this.toggleHelp.emit(true);
  </code></pre>
  
  <p>And in the parent component:</p>
  
  <pre><code>toggleHelp() {
    console.log('event fired');
  }
  </code></pre>
  
  <p>So far no success.
  If I call the component without <code>ngSwitch</code>, then it works fine.
  Any help would be appreciated.</p>