javascript sleep on未调用的函数

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function demo() {
  console.log('Taking a break...');
  await sleep(2000);
  console.log('Two second later...');
}

demo();

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function demo() {
  console.log('Taking a break...');
  await sleep(2000);
  console.log('Two second later...');
}

demo();

// 确保在异步函数中使用await
async function main() {
  console.log('Before sleep');
  await sleep(1000);
  console.log('After sleep');
}

main();