<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script src="https://cdn.bootcdn.net/ajax/libs/moment.js/2.29.1/moment.min.js"></script>
<script>
setInterval(() => {
let start = moment(new Date());//获取开始时间
let end = moment(new Date("2020/12/20"));//结束时间
let diff = end.diff(start);//时间差
let time = `${moment.duration(diff).hours()} - ${moment.duration(diff).minutes()} - ${moment.duration(diff).seconds()}`//格式化为需要的格式 这里是时分秒
console.log(time)
}, 1000)
</script>
</body>
</html>
