from - 2
RxJS 5 from
HTML
<script src="https://npmcdn.com/@reactivex/[email protected]/dist/global/Rx.umd.js"></script>
JavaScript
//emit result of promise
const promiseSource = Rx.Observable.from(new Promise(resolve => resolve('Hello World!')));
//output: 'Hello World'
const subscribe = promiseSource.subscribe(val => console.log(val));