JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://unpkg.com/@reactivex/rxjs@5.2.0/dist/global/Rx.js"></script>
<h1>快速點擊我，看 console</h1>

CSS

html, body {
  height: 100%;
  background-color: tomato;
}

JavaScript

var click = Rx.Observable.fromEvent(document, 'click');
var source = Rx.Observable.interval(1000);
var example = click.window(source)

example
  .map(innerObservable => innerObservable.count())
  .switch()
  .subscribe(console.log);