哪些实用工具有助于处理异步代码（promisify、AbortController）？

const controller = new AbortController();

// pass the signal to a cancellable operation
const promise = fetch("https://api.example.com", { signal: controller.signal });

// cancel it (e.g. on timeout or user navigation)
setTimeout(() => controller.abort(), 5000); // abort after 5s

try {
  await promise;
} catch (err) {
  if (err.name === "AbortError") console.log("request cancelled");
}

// run in parallel, wait for ALL (fails fast if any rejects)
const [a, b, c] = await Promise.all([getA(), getB(), getC()]);

// wait for all, get each result OR error (never short-circuits)
const results = await Promise.allSettled([getA(), getB()]);

// the first to settle (resolve OR reject) wins
const fastest = await Promise.race([fetchPrimary(), fetchBackup()]);

// the first to FULFILL (ignores rejections until one succeeds)
const first = await Promise.any([source1(), source2()]);

import { setTimeout as sleep } from "timers/promises";
await sleep(1000); // await a delay without wrapping in a Promise manually