startWith
RxJS 5 startWith
HTML
<script src="https://npmcdn.com/@reactivex/[email protected]/dist/global/Rx.umd.js"></script>JavaScript
//emit (1,2,3)
const source = Rx.Observable.of(1,2,3);
//start with 0
const example = source.startWith(0);
//output: 0,1,2,3
const subscribe = example.subscribe(val => console.log(val));