html除夕倒计时 是这个

HTML 是这个吗
倒计时.html
这是名称吗
我不知道
请你帮忙回答一下谢谢啦
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<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>
        <h1>2022年除夕还剩<span id="id1"></span>天<span id="id2"></span>小时<span id="id3"></span>分<span id="id4"></span>秒</h1>
    </body>
    
    <script type="text/javascript">
        var d = document.getElementById("id1");
        var h = document.getElementById("id2");
        var m = document.getElementById("id3");
        var s = document.getElementById("id4");
        
        var endTime = new Date("2022/01/31");
        setInterval(function(){
            var nowTime = new Date();
            // console.log(nowTime);
            // console.log(nowTime.getTime())
            var diff = endTime.getTime() - nowTime.getTime();
            // console.log(diff);
            diff = parseInt(diff/1000);
            var days = toTwo(parseInt(diff/(24*3600)));//剩余天数
            var hours = toTwo(parseInt(diff % (24*3600) / 3600));
            var minutes = toTwo(parseInt(diff % 3600 / 60));
            var seconds = toTwo(diff % 60);
            
            d.innerHTML = days;
            h.innerHTML = hours;
            m.innerHTML = minutes;
            s.innerHTML = seconds;
        }, 1000)
        function toTwo(v){
            return v < 10 ? '0'+v:v;
        }
    </script>
</html>