property 'forkJoin' does not exist on type 'typeof observable' - angular2

I was looking to experiment with a forkJoin mainly using the accepted answer here:

I'm getting the above error message as forkJoin isn't available.

Anyone know why?

Solution

Angular 6 changes this up a bit. forkJoin has been converted to a regular function so, instead of:

import {Observable} from 'rxjs/Observable';
...
return Observable.forkJoin(
    this.http.get('someurl'),
    this.http.get('someotherurl'));

Use:

import {forkJoin} from 'rxjs';
...
return forkJoin(
    this.http.get('someurl'),
    this.http.get('someotherurl'));