from

RxJS 5 from

by Echyzen

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/6.2.1/rxjs.umd.js"></script>
<script src="https://rawgit.com/eu81273/jsfiddle-console/master/console.js"></script>

JavaScript

//emit every click on document
const source$ = rxjs.fromEvent(document, 'click');
//map all emissions to one value
const example$ = source$.pipe(rxjs.operators.mapTo('GOODBYE WORLD!'));
//output: (click)'GOODBYE WORLD!'...
const subscribe = example$.subscribe(val => console.log(val));