withTimeout.js

async function withTimeout(fn, ms = 400) {
  return new Promise(async (resolve, reject) => {
    setTimeout(() => {
      reject();
    }, ms);
    resolve(await fn());
  });
}

async function delay(ms = 0) {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve();
    }, ms);
  });
}

withTimeout(() => delay(200)).then(_ => console.log("a")).catch(_ => console.log("b"));
withTimeout(() => delay(600)).then(_ => console.log("x")).catch(_ => console.log("y"));