title: Get selected option text onChange
body: <p>I know how to get the selected option <strong>value</strong> when a select changes (as shown below), but how do I get the displayed <strong>text</strong> of the selected option?</p>
  
  <p>Template:</p>
  
  <pre><code>&lt;select (change)="onChange($event.target.value)"&gt;
      &lt;option *ngFor="let option of activeDropdown.options" value="{{option.value}}"&gt;
          {{option.text}}
      &lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>Component:</p>
  
  <pre><code>onChange(value: string) {
      console.log(value);
  }
  </code></pre>
  
  <p>Thanks!</p>