medium-rxjs-publish-multicast-delay.ts

import { Observable } from "rxjs/Observable";
import { Subject } from "rxjs/Subject";
import "rxjs/add/observable/defer";
import "rxjs/add/observable/of";
import "rxjs/add/operator/delay";
import "rxjs/add/operator/multicast";

const source = Observable.defer(() => Observable.of(
  Math.floor(Math.random() * 100)
)).delay(0);