How to write window closing event handler in angular 2?

Question

How to write window closing event handler in Angular 2, by that I mean closing not refreshing.

So I can't use window.onBeforeunLoad();

user_5362646 · Answer

Try like this :

import { HostListener } from '@angular/core';

@HostListener('window:beforeunload', ['$event'])
beforeUnloadHander(event) {
    return false;
}