Why isn't the parent (click) event triggered by the child element in Angular 4?

One of my challenges involves implementing a dropdown function that should be activated with a click on this specific div

<div (click)="toggleDropdown($event)" data-id="userDropdown">
 Username <i class="mdi mdi-chevron-down"></i>
</div>

Unfortunately, the click event does not seem to trigger when I click on the <i> element within the div

toggleDropdown($event) {
    const id = $event.target;
    document.querySelector('[data-drop=' + id.getAttribute('data-id') + ']').classList.toggle('active');
}

I am looking for a way to ensure that the child click event can also activate the parent event. Any suggestions?

Plunker

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