延迟异步函数的执行

延迟异步函数的执行。

延迟执行async函数的一部分, 将其放入休眠状态, 返回Promise.

const sleep = ms => new Promise(resolve => setTimeout(resolve, ms));
/*
async function sleepyWork() {
  console.log('I\'m going to sleep for 1 second.');
  await sleep(1000);
  console.log('I woke up after 1 second.');
}
*/