Function delay

async/delay.ts:51–78

(ms: number, options: DelayOptions = {})

 * ```
 */
export function delay(ms: number, options: DelayOptions = {}): Promise<void> {
  const { signal, persistent = true } = options;
  if (signal?.aborted) return Promise.reject(signal.reason);
  return new Promise((resolve, reject) => {
    const abort = () => {
      clearTimeout(+i);
      reject(signal?.reason);
    };
    const done = () => {
      signal?.removeEventListener("abort", abort);
      resolve();
    };
    const i = setArbitraryLengthTimeout(done, ms);
    signal?.addEventListener("abort", abort, { once: true });
    if (persistent === false) {
      try {
        Deno.unrefTimer(+i);
      } catch (error) {
        if (!(error instanceof ReferenceError)) {
          clearTimeout(+i);
          throw error;
        }
        // deno-lint-ignore no-console
        console.error("`persistent` option is only available in Deno");
      }
    }
  });
}

const I32_MAX = 2 ** 31 - 1;