sleep 延迟

    function sleep(delay) {
      return new Promise((resolve) => {
        setTimeout(() => {
          resolve();
        }, delay);
      });
    }
    async function hd() {
      for (const user of ["小明", "小红", "小刚"]) {
        await sleep(1000);
        console.log(user);
      }
    }
    hd();