JS 等待时间

export const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
export const awaitTime = async (cb, ms) => {
  const start = new Date().getTime();
  const res = await cb();
  const end = new Date().getTime();
  if (end - start < ms) {
    await new Promise((resolve) => {
      setTimeout(resolve, ms - (end - start));
    });
  }
  return res;
};