name : executeSchedule.ts import { Subscription } from '../Subscription'; import { SchedulerAction, SchedulerLike } from '../types'; export function executeSchedule( parentSubscription: Subscription, scheduler: SchedulerLike, work: () => void, delay: number, repeat: true ): void; export function executeSchedule( parentSubscription: Subscription, scheduler: SchedulerLike, work: () => void, delay?: number, repeat?: false ): Subscription; export function executeSchedule( parentSubscription: Subscription, scheduler: SchedulerLike, work: () => void, delay = 0, repeat = false ): Subscription | void { const scheduleSubscription = scheduler.schedule(function (this: SchedulerAction<any>) { work(); if (repeat) { parentSubscription.add(this.schedule(null, delay)); } else { this.unsubscribe(); } }, delay); parentSubscription.add(scheduleSubscription); if (!repeat) { // Because user-land scheduler implementations are unlikely to properly reuse // Actions for repeat scheduling, we can't trust that the returned subscription // will control repeat subscription scenarios. So we're trying to avoid using them // incorrectly within this library. return scheduleSubscription; } }