倒计时到苹果发布会-优快云博客

本文展示了一个使用JavaScript实现的倒计时示例，用于显示距离2018年6月10日上午9点苹果发布会开始的时间。通过计算当前时间和指定时间之间的差值，并将结果显示在网页上。

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<!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>
    <style>
        div {
            width: 1210px;
            margin: 200px auto;
            color: red;
            text-align: center;
            font: 600 30px/30px "simsun";
        }
    </style>
</head>
<body>
    <div></div>

    <script>
        var div = document.getElementsByTagName("div")[0];
        var timer = setInterval(fn,1000);
        function fn() {
            var nowTime = new Date();
            var future = new Date("2018/06/10 09:00:00");
            var timeSum = future.getTime() - nowTime.getTime();
            var day = parseInt(timeSum/1000/60/60/24);
            var hour = parseInt(timeSum/1000/60/60%24);
            var min = parseInt(timeSum/1000/60%60);
            var sec = parseInt(timeSum/1000%60);
            var millsec = parseInt(timeSum%1000);
            day = day < 10 ? "0" + day : day;
            hour = hour < 10 ? "0" + hour : hour;
            min = min < 10 ? "0" + min : min;
            sec = sec < 10 ? "0" + sec : sec;
            if(millsec < 10) {
                millsec = "00" + millsec;
            }else if(millsec < 100) {
                millsec = "0" + millsec;
            }

            if(timeSum < 0) {
                div.innerHTMl = "距离拼过发布会还有00天00小时00分00秒0000毫秒";
                clearInterval(timer);
                return;
            }
            div.innerHTML = "距离苹果发布会还有" + day + "天" + hour + "小时" + min + "分" + sec + "秒" + millsec + "毫秒";
        }
    </script>
</body>
</html>