补全以下代码:<!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> .countdown { width: 240px; height: 305px; text-align: center; line-height: 1; color: #fff; background-color: brown; /* background-size: 240px; */ /* float: left; */ overflow: hidden; } .countdown .next { font-size: 16px; margin: 25px 0 14px; } .countdown .title { font-size: 33px; } .countdown .tips { margin-top: 80px; font-size: 23px; } .countdown small { font-size: 17px; } .countdown .clock { width: 142px; margin: 18px auto 0; overflow: hidden; } .countdown .clock span, .countdown .clock i { display: block; text-align: center; line-height: 34px; font-size: 23px; float: left; } .countdown .clock span { width: 34px; height: 34px; border-radius: 2px; background-color: #303430; } .countdown .clock i { width: 20px; font-style: normal; } </style> </head> <body> <div class="countdown"> <p class="next">今天是2023年4月24日</p> <p class="title">下课倒计时</p> <p class="clock"> <span id="hour">00</span> <i>:</i> <span id="minutes">25</span> <i>:</i> <span id="scond">20</span> </p> <p class="tips"> 现在是09:00:00 </p> </div> <script> let countdown = ( ) </script> </body> </html>
时间: 2024-02-10 10:07:08 浏览: 128
-doctype-html-html-lang-en-dir-ltr-head-meta-name:
补全代码如下:
```
let countdown = () => {
let now = new Date();
let end = new Date("2023/4/24 09:25:20");
let leftTime = end.getTime() - now.getTime();
let hour, minutes, scond;
if (leftTime >= 0) {
hour = Math.floor(leftTime / 1000 / 60 / 60 % 24);
minutes = Math.floor(leftTime / 1000 / 60 % 60);
scond = Math.floor(leftTime / 1000 % 60);
} else {
return false;
}
document.getElementById("hour").innerHTML = hour < 10 ? "0" + hour : hour;
document.getElementById("minutes").innerHTML = minutes < 10 ? "0" + minutes : minutes;
document.getElementById("scond").innerHTML = scond < 10 ? "0" + scond : scond;
setTimeout(countdown, 1000);
};
countdown();
```
该代码是一个倒计时的功能,根据设定的截止时间,计算当前时间距离截止时间还有多少时间,然后将计算结果显示在页面上。其中,倒计时的时间可以根据需要进行修改。
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