I am using Rxjs in an angualr-cli application.
Rxjs
angualr-cli
in viewer.component.ts
//Other Imports import { Observable } from \'rxj
For RxJS v6.5+, it is now:
RxJS v6.5+
import { forkJoin } from 'rxjs';
https://www.learnrxjs.io/operators/combination/forkjoin.html