Angular2, HostListener, how can I target an element? can I target based on class?

Question

In Angular2, how can I target an element within the HostListener decorator?

@HostListener(\'dragstart\', [\'$event\'])
    onDragStart(ev:Event) {
        co         


        

Answer 1

Since the accepted answer doesn't actually help to solve the problem, here is a solution.

A better way to achieve this is by creating a directive, this way you can add the directive to any element you wish, and the listeners will only trigger for this particular element.

For example:

@Directive({
   selector: "[focus-out-directive]"
})
export class FocusOutDirective {
   @Output() onFocusOut: EventEmitter = new EventEmitter();

   @HostListener("focusout", ["$event"])
   public onListenerTriggered(event: any): void {
       this.onFocusOut.emit(true);
   }
}

Then on your HTML elements you wish to apply this listener to, just add the directive selector, in this case focus-out-directive, and then supply the function you wish to trigger on your component.

Example: