Angular2, HostListener, how can I target an element? can I target based on class? : <p>In Angular2, how can I target an element within the HostListener decorator?</p>

<pre><code>@HostListener('dragstart', ['$event'])
    onDragStart(ev:Event) {
        console.log(ev);
    }

@HostListener('document: dragstart', ['$event'])
    onDragStart(ev:Event) {
        console.log(ev);
    }

@HostListener('myElement: dragstart', ['$event'])
    onDragStart(ev:Event) {
        console.log(ev);
    }

@HostListener('myElement.myClass: dragstart', ['$event'])
    onDragStart(ev:Event) {
        console.log(ev);
    }
</code></pre>

<p>The two first work. Any other thing I've tried raises an <code>EXCEPTION: Unsupported event target undefined for event dragstart</code></p>

<p>So, can I implement it to a targeted element? How?</p>
