merge

RxJS 5 merge

by Brian Troncone

HTML

<script src="https://npmcdn.com/@reactivex/[email protected]/dist/global/Rx.umd.js"></script>

JavaScript

//emit every 2.5 seconds
const first = Rx.Observable.interval(2500);
//emit every 2 seconds
const second = Rx.Observable.interval(2000);
//emit every 1.5 seconds
const third = Rx.Observable.interval(1500);
//emit every 1 second
const fourth = Rx.Observable.interval(1000);

//emit outputs from one observable
const example = Rx.Observable.merge(
  first.mapTo('FIRST!'),
  second.mapTo('SECOND!'),
  third.mapTo('THIRD'),
  fourth.mapTo('FOURTH')
);
//output: "FOURTH", "THIRD", "SECOND!", "FOURTH", "FIRST!", "THIRD", "FOURTH"
const subscribe = example.subscribe(val => console.log(val));