rxjs resize, orientationchange

rx.js

var source$ = (function(Observable){
    var resize$ = Observable.fromEvent(window, 'resize')
      .debounceTime(150)
      .startWith(window)
      .map(function(){
        return {innerWidth:window.innerWidth, innerHeight:window.innerHeight}
      });

    var orientationChange$ = Observable.fromEvent(window, 'orientationchange')
      .delay(650)
      .map(function(){
        return {innerWidth:window.innerWidth, innerHeight:window.innerHeight}
      });
    
    return Observable.merge(resize$, orientationChange$)
      .distinctUntilChanged(function(prev, curr) {
        return (prev.innerWidth === curr.innerWidth) && (prev.innerHeight === curr.innerHeight);
      });

  })(Rx.Observable);