forkJoin 3

RxJS 5 forkJoin

by Brian Troncone

HTML

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

JavaScript

/*
  when all observables complete, give the last
  emitted value from each as an array
*/
const example = Rx.Observable.forkJoin(
  //emit 'Hello' immediately
  Rx.Observable.of('Hello'),
  //emit 'World' after 1 second
  Rx.Observable.of('World').delay(1000),
  // throw error
  Rx.Observable.throw('This will error').catch(error => Rx.Observable.of(error))
);
//output: ["Hello", "World", "This will error"]
const subscribe = example.subscribe(val => console.log(val));