Ionic2 toggle component change event not firing
<p>My app is rendering fine, but why would the <code>change</code> event function <code>updateItem(item)</code> not be firing?  </p>

<p><strong>Template:</strong></p>

<pre><code>  &lt;ion-list&gt;
    &lt;ion-item-sliding *ngFor="#item of items"&gt;
      &lt;ion-item&gt;
        &lt;ion-label&gt;{{item.title}}&lt;/ion-label&gt;
        &lt;ion-toggle [(ngModel)]="item.completed" (change)="updateItem(item)"&gt;&lt;/ion-toggle&gt;
      &lt;/ion-item&gt;
      &lt;ion-item-options&gt;
        &lt;button primary (click)="editItem(item)"&gt;
          &lt;ion-icon name="edit"&gt;&lt;/ion-icon&gt;Edit
        &lt;/button&gt;
      &lt;button secondary (click)="deleteItem(item)"&gt;
        &lt;ion-icon name="delete"&gt;&lt;/ion-icon&gt;Delete
      &lt;/button&gt;
      &lt;/ion-item-options&gt;
    &lt;/ion-item-sliding&gt;
  &lt;/ion-list&gt;
</code></pre>

<p><strong>Class:</strong></p>

<pre><code>export class Todos {
...
  updateItem(item) {
    alert(1)
    this._todosService.update(item).subscribe(
      response =&gt; { this.getItems(); }
    );
  }
... 
}
</code></pre>