'Error' message: 'Property 'from' does not exist on type 'typeof Observable'

Question

I am trying to learn reactive programming using RxJS. I was trying to create an observable from an array using Observable.from() method, but I am getting an err

Answer 1

If you are using rxjs >=6.0.0 then you no longer use Observable.from. Instead from is a standalone function.

import { Observable, from} from 'rxjs';

//old way
var o = Observable.from([1, 2, 3, 4]);

//new way
var o = from([1, 2, 3, 4]);

I hope this is helpful since it took me a while to figure this out.

Answer 2

Change

import { Observable} from 'rxjs/Observable'
import 'rxjs/observable/from'

To

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/observable/from';