JS 毫秒倒计时

最新推荐文章于 2023-11-14 10:56:21 发布

转载最新推荐文章于 2023-11-14 10:56:21 发布 · 1.1k 阅读

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本文详细解析了一段用于实现网页倒计时功能的JavaScript代码。通过分析代码逻辑，读者可以了解如何计算剩余时间并将其显示在网页上。文章中包含了完整的HTML和JavaScript代码示例，适合初学者学习。

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原文：https://www.cnblogs.com/seven077/p/9506765.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <div>
        <span id="_d">00</span>
        <span id="_h">00</span>
        <span id="_m">00</span>
        <span id="_s">00</span>
        <span id="_ms">00</span>
    </div>

</body>
<script type="text/javascript">
    function countTime() {
        var date = new Date();
        var now = date.getTime();
        var endDate = new Date("2019-06-03 18:28:00"); 
        var end = endDate.getTime();
        var leftTime = end - now; 
        var d, h, m, s, ms;
        var timer;
        if (leftTime >= 0) {
            d = Math.floor(leftTime / 1000 / 60 / 60 / 24);
            h = Math.floor(leftTime / 1000 / 60 / 60 % 24);
            m = Math.floor(leftTime / 1000 / 60 % 60);
            s = Math.floor(leftTime / 1000 % 60);
            ms = Math.floor(leftTime % 100);
			console.log(leftTime,ms);
            if (ms < 10) {
                ms = "0" + ms;
            }
            if (s < 10) {
                s = "0" + s;
            }
            if (m < 10) {
                m = "0" + m;
            }
            if (h < 10) {
                h = "0" + h;
            }
            document.getElementById("_d").innerHTML = d + "天";
            document.getElementById("_h").innerHTML = h + "时";
            document.getElementById("_m").innerHTML = m + "分";
            document.getElementById("_s").innerHTML = s + "秒";
            document.getElementById("_ms").innerHTML = ms + "毫秒";
			
            timer = setTimeout(countTime, 60);  // 速度

        } else {
            console.log('锟窖斤拷止')
            document.getElementById("_d").innerHTML = "00天";
            document.getElementById("_h").innerHTML = "00时";
            document.getElementById("_m").innerHTML = "00分";
            document.getElementById("_s").innerHTML = "00秒";
            document.getElementById("_ms").innerHTML = "00毫秒";
        }

    }

    countTime();
</script>

</html>