原生js实现电子时钟

最新推荐文章于 2025-03-11 11:28:52 发布

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最新推荐文章于 2025-03-11 11:28:52 发布

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分类专栏： JavaScript 文章标签： javascript css dom操作

本文链接：https://blog.youkuaiyun.com/Wind_AN/article/details/117767364

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index.html

<!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>数字时钟</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
    <div class="wrap">
        <div class="item">0</div><!-- 0~2 -->
        <div class="item">0</div><!-- 0~9 -->
        <div class="colon">:</div>
        <div class="item">0</div><!-- 0~6 -->
        <div class="item">0</div><!-- 0~9 -->
        <div class="colon">:</div>
        <div class="item">0</div><!-- 0~6 -->
        <div class="item">0</div><!-- 0~9 -->
    </div>
    <script src="clock.js"></script>
</body>
</html>

index.css

* {
    margin: 0;
    padding: 0;
}
body {
    background-color: black;
}
.wrap {
    width: 800px;
    height: 100px;
    background-color: #355da7;
    border-radius: 10px;
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    margin: auto;
    display: flex;
}
.wrap .item,
.wrap .colon {
    flex: 1;
    text-align: center;
    line-height: 100px;
    font-size: 70px;
    font-weight: 100;
    color: wheat;
}

clock.js

let item = document.getElementsByClassName("item");

function changeTime() {
    setInterval(function() {
        let hour = new Date().getHours();
        let minute = new Date().getMinutes();
        let sec = new Date().getSeconds(); 
        let hourItem = handleTime(hour);
        let minuteItem = handleTime(minute);
        let secItem = handleTime(sec);

        item[0].innerHTML = hourItem[0];
        item[1].innerHTML = hourItem[1];
        item[2].innerHTML = minuteItem[0];
        item[3].innerHTML = minuteItem[1];
        item[4].innerHTML = secItem[0];
        item[5].innerHTML = secItem[1];
    },1000)
}
changeTime();
function handleTime(number) {
    let arr = [];
    //23 =2--3
    //11 =1--1
    //10 % 10 = 1--0
    //5 % 10 = 0--5
    let a = number % 10;
    let b = (number - a) / 10;
    arr.push(b,a);
    return arr;
}