javascript window resize event

//listen for window resize event
window.addEventListener('resize', function(event){
    var newWidth = window.innerWidth;
    var newHeight = window.innerHeight; 
});window.resize = event => {
  // Code here
};resizeObservable$: Observable<Event>
resizeSubscription$: Subscription

ngOnInit() {
    this.resizeObservable$ = fromEvent(window, 'resize')
    this.resizeSubscription$ = this.resizeObservable$.subscribe( evt => {
      console.log('event: ', evt)
    })
}