import type { NumberOfMilliseconds, PromisableFunction } from '../types.js';
import type { DeferredPromise } from './pDefer.js';
/**
 * Promisified version of setTimeout.
 *
 * Can return a value.
 * If value is instanceof Error - rejects the Promise instead of resolving.
 */
export declare function pDelay<T>(ms?: NumberOfMilliseconds, value?: T): Promise<T>;
/**
 * Promisified version of setTimeout.
 *
 * Wraps the passed function with try/catch,
 * catch will propagate to pDelayFn rejection,
 * otherwise pDelayFn will resolve with returned value.
 *
 * On abort() - clears the Timeout and immediately resolves the Promise with void.
 */
export declare function pDelayFn<T>(ms: NumberOfMilliseconds, fn: PromisableFunction<T>): DeferredPromise<T>;