How to implement a simple countdown effect of hours, minutes and seconds in js (code example)-JS Tutorial-php.cn

How to implement a simple countdown effect of hours, minutes and seconds in js (code example)

青灯夜游

Release： 2018-10-23 18:00:47

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The content of this article is to introduce how to implement a simple countdown effect of hours, minutes and seconds in js (code example). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Effect:

How to implement a simple countdown effect of hours, minutes and seconds in js (code example)

##javascript:

    <script type="text/javascript">
        function countTime() {
            //获取当前时间
            var date = new Date();
            var now = date.getTime();
            //设置截止时间
            var endDate = new Date("2018-10-25 00:00:00");
            var end = endDate.getTime();
            //时间差
            var differTime = end - now;
            //定义变量,h,m,s保存倒计时的时间
            var h, m, s;
            if (differTime >= 0) {
                h = Math.floor(differTime / 1000 / 60 / 60);
                m = Math.floor(differTime / 1000 / 60 % 60);
                s = Math.floor(differTime / 1000 % 60);
                h = h < 10 ? ("0" + h) : h;
                m = m < 10 ? ("0" + m) : m;
                s = s < 10 ? ("0" + s) : s;
                document.getElementById("_h").innerHTML = h + "时";
                document.getElementById("_m").innerHTML = m + "分";
                document.getElementById("_s").innerHTML = s + "秒";
                setTimeout(countTime, 1000);

            } else {
                document.getElementById("_h").innerHTML = "00时";
                document.getElementById("_m").innerHTML = "00分";
                document.getElementById("_s").innerHTML = "00秒";
            }


        }
    </script>

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HTML:

<body onload="countTime()">
    <p class="timer">
        <span id="_h"></span>
        <span id="_m"></span>
        <span id="_s"></span>
    </p>
</body>

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