concat - 4

RxJS 5 concat

by Brian Troncone

HTML

<script src="https://npmcdn.com/@reactivex/rxjs@5.0.0-beta.8/dist/global/Rx.umd.js"></script>

JavaScript

//when source never completes, the subsequent observables never runs
const source = Rx.Observable
  .concat(
  	Rx.Observable.interval(1000),
  	Rx.Observable.of('This','Never','Runs')  
  )
//outputs: 1,2,3,4....
const subscribe = source.subscribe(val => console.log('Example: Source never completes, second observable never runs:', val));