秒杀倒计时小案例-CFANZ编程社区

秒杀倒计时小案例
JamFF 2022-01-05 阅读 32
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        span{
            width: 25px;
            height: 25px;
            background-color: #303330;
            font-size: 14px;
            color: #fff;
            padding: 4px;
        }
    </style>
</head>
<body>
    <script>
        window.addEventListener('load',function(){
            var day = document.querySelector('.day')
            var hour = document.querySelector('.hour')
            var minute = document.querySelector('.minute')
            var second = document.querySelector('.second')
            var inserttime = prompt("请输入结束时间,以2022-01-05 20:00:00的形式来输入")
            var inputtime = +new Date(inserttime)
            function getTimer(){
                var nowtime = +new Date()
                // 现在时间的毫秒数
                var nowtime = +new Date()
                // 剩余时间秒数 = 结束时间的时间戳 - 现在时间的时间戳
                var resttimeseconds = (inputtime - nowtime) / 1000
                // 毫秒转化为还有多少天，小时，分钟，秒
                var days = parseInt(resttimeseconds/60/60/24)
                days = days < 10 ? '0' + days : days
                var hours = parseInt(resttimeseconds/60/60%60)
                hours = hours < 10 ? '0' + hours : hours
                var minutes = parseInt(resttimeseconds/60%60)
                minutes = minutes < 10 ? '0' + minutes : minutes
                var seconds = parseInt(resttimeseconds%60)
                seconds = seconds < 10 ? '0' + seconds : seconds
                
                day.innerText = days+'天'
                hour.innerText = hours
                minute.innerText = minutes
                second.innerText = seconds
            }
            // 开启定时器前先执行一次函数
            getTimer()
            setInterval(getTimer,1000)
        })
    </script>
    <div>
        <span class="day"></span>
        <span class="hour"></span>
        <span class="minute"></span>
        <span class="second"></span>
    </div>
</body>
</html>
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