SOURCE

//异步输出 
//Q:当前时间的代码  3个线程  输出10s
function sleep(time) {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve()
    }, time * 1000)
  })
}

async function timeee() {
    await console.log("线程1", mydate);
    
    await console.log("线程3", mydate);

    await console.log("线程2", mydate);

};

async function main() {
  for (let i = 0; i < 10; i++) {
    
    await sleep(1)
    var mydate=new Date();
    await console.log("线程1", mydate);
    var mydate=new Date();
    await console.log("线程3", mydate);
    var mydate=new Date();
    await console.log("线程2", mydate);
    
  }
  console.log('完成')
}
 
main()  // 执行一下