title: Angular Material Datepicker toggle icon click event
body: <p>Is it possible to somehow catch click event on angular material datepicker toggle icon? I want trigger function foo().</p>
  
  <p>My implementation looks like:</p>
  
  <pre><code>          &lt;mat-form-field class="example-full-width"&gt;
              &lt;input matInput [matDatepicker]="picker" placeholder="Date"&gt;
              &lt;mat-datepicker-toggle matSuffix [for]="picker" (click)="foo()"&gt;&lt;/mat-datepicker-toggle&gt;
              &lt;mat-datepicker #picker&gt;&lt;/mat-datepicker&gt;
            &lt;/mat-form-field&gt;
  </code></pre>
  
  <p>I have already tried put (click)="foo()" to mat-datepicker-toggle and mat-datepicker element but event not triggered. </p>