如何写一个js指定时间倒计时

旧城等待， 2021-09-30 11:34 244阅读 0赞

<!DOCTYPE html>
        <html lang="en">
        <head>
            <meta charset="UTF-8">
            <title>计时</title>
        </head>
        <body>
            <div style="display: flex; justify-content: center; align-items: center;">
                <span>从2019年6月31日至今：</span>
                <span id="timeid1" style="font-size:35px"></span>天
                <span id="timeid2" style="font-size:35px"></span>小时
                <span id="timeid3" style="font-size:35px"></span>分
                <span id="timeid4" style="font-size:35px"></span>秒
            </div>
            <script type="text/javascript"> function loveTime() { var the=new Date(2019,6,31) var date = new Date() - the var days = Math.floor(date / 1000 / 60 / 60 / 24) // 从这里开始 var daysmod = date - days * 24 *60 * 60 * 1000 var hours = Math.floor(daysmod / 1000 / 60 / 60) var hoursmod = date - (days * 24 *60 * 60 * 1000) - (hours * 1000 * 60 * 60) var minutes = Math.floor(hoursmod / 1000 / 60) var minutesmod = date - (days * 24 *60 * 60 * 1000) - (hours * 1000 * 60 * 60) - (minutes * 1000 * 60) var seconds = Math.floor(minutesmod / 1000) // 到这里结束，是将总毫秒转化成对应天数+小时数+分钟数+秒数的转换方法 var daysshow = document.getElementById("timdid1"); var ds = document.getElementById("timeid1"); var hs = document.getElementById("timeid2"); var ms = document.getElementById("timeid3"); var ss = document.getElementById("timeid4"); ds.innerHTML = days; hs.innerHTML = hours; ms.innerHTML = minutes; ss.innerHTML = seconds; } // 使用定时器实现每一秒写一次时间 setInterval("loveTime();",1000); </script>
        </body>
        </html>