1
function sleep(time) {
2
  const startTime = Date.now();
3

4
  while (Date.now() - startTime < time) {
5
    continue;
6
  }
7
}
8

9
console.log("start");
10
sleep(2000);
11
console.log("end");

1
function sleep(time) {
2
  return new Promise((resolve) => {
3
    setTimeout(() => {
4
      resolve();
5
    }, time);
6
  });
7
}
8

9
async function test() {
10
  console.log("start");
11
  await sleep(2000);
12
  console.log("end");
13
}
14

15
test();