@reactivex/rxjs/dist/es6/src/operator/subscribeOn.ts

Reactive Extensions for modern JavaScript

import { Scheduler } from '../Scheduler';
import { Observable } from '../Observable';
import { SubscribeOnObservable } from '../observable/SubscribeOnObservable';

/**
 * Asynchronously subscribes Observers to this Observable on the specified Scheduler.
 *
 * <img src="./img/subscribeOn.png" width="100%">
 *
 * @param {Scheduler} the Scheduler to perform subscription actions on.
 * @return {Observable<T>} the source Observable modified so that its subscriptions happen on the specified Scheduler
 .
 * @method subscribeOn
 * @owner Observable
 */
export function subscribeOn<T>(this: Observable<T>, scheduler: Scheduler, delay: number = 0): Observable<T> {
  return new SubscribeOnObservable<T>(this, delay, scheduler);
}