JavaScript 利用 async await 实现 sleep 效果

const sleep = (timeountMS) => new Promise((resolve) => {
setTimeout(resolve, timeountMS);
});
(async () => {
console.log(‘11111111, ‘ + new Date());
await sleep(2000);
console.log(‘22222222, ‘ + new Date());
await sleep(2000);
console.log(‘33333333, ‘ + new Date());
})();

<br />async function formatTime(){<br />     await sleep(500);<br />     if (typeof(sdate)!="undefined"<br />       && typeof(srealtime)!="undefined"<br />       && typeof(edate)!="undefined"<br />       && typeof(erealtime)!="undefined"){<br />   var startdate = sdate + " " +srealtime;<br />   var enddate = edate + " " + erealtime;<br />   duration = getRemainderTime(startdate,enddate);<br />   console.log("duration is "+ duration);<br />   if(duration<0){<br />       $("#duration").css("color","red").html("请选择正确的开始结束时间！");<br />   }else{<br />       $("#duration").css("color","black").html(duration+"天");<br />   }<br />     }<br /> }<br /> function sleep(ms) {<br />   return new Promise(resolve => setTimeout(resolve, ms));<br /> }