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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
export interface DelayOptions {  /** Signal used to abort the delay. */  signal?: AbortSignal;  /** Indicates whether the process should continue to run as long as the timer exists.   *   * @default {true}   */  persistent?: boolean;}
/** * Resolve a Promise after a given amount of milliseconds. * * @example * * ```typescript * import { delay } from "https://deno.land/std@$STD_VERSION/async/delay.ts"; * * // ... * const delayedPromise = delay(100); * const result = await delayedPromise; * // ... * ``` * * To allow the process to continue to run as long as the timer exists. Requires * `--unstable` flag. * * ```typescript * import { delay } from "https://deno.land/std@$STD_VERSION/async/delay.ts"; * * // ... * await delay(100, { persistent: false }); * // ... * ``` */export function delay(ms: number, options: DelayOptions = {}): Promise<void> {  const { signal, persistent } = options;  if (signal?.aborted) {    return Promise.reject(new DOMException("Delay was aborted.", "AbortError"));  }  return new Promise((resolve, reject) => {    const abort = () => {      clearTimeout(i);      reject(new DOMException("Delay was aborted.", "AbortError"));    };    const done = () => {      signal?.removeEventListener("abort", abort);      resolve();    };    const i = setTimeout(done, ms);    signal?.addEventListener("abort", abort, { once: true });    if (persistent === false) {      try {        // @ts-ignore For browser compatibility        Deno.unrefTimer(i);      } catch (error) {        if (!(error instanceof ReferenceError)) {          throw error;        }        console.error("`persistent` option is only available in Deno");      }    }  });}