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<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
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<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());//獲取開始時間
let end = moment(new Date("2020/12/20"));//結束時間
let diff = end.diff(start);//時間差
let time = `${moment.duration(diff).hours()} - ${moment.duration(diff).minutes()} - ${moment.duration(diff).seconds()}`//格式化為需要的格式 這里是時分秒
console.log(time)
}, 1000)
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