【前端】实现时钟网页

在这里插入图片描述

文章目录

【前端】实现时钟网页
- - 项目介绍
  - 代码
  - 效果图

项目介绍

时钟显示在网页中央，并且使网页能够切换白天和夜晚两种模式。搭建基本的html结构，动态得到实时的时，分，秒
通过Date()函数获得。将得到的数字根据逻辑，绑定
给各div结构，实行动态旋转。点击按钮，改变背景颜色
给出最终的HTML代码。

代码

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>现代风格时钟</title>
    <style>
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #f0f0f0;
            transition: background-color 0.5s;
        }
        .clock-container {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .clock {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background-color: white;
            position: relative;
            box-shadow: 0 0 20px rgba(0,0,0,0.1);
        }
        .hand {
            position: absolute;
            bottom: 50%;
            left: 50%;
            transform-origin: 50% 100%;
            border-radius: 5px;
        }
        .hour {
            width: 4px;
            height: 50px;
            background-color: #333;
        }
        .minute {
            width: 3px;
            height: 70px;
            background-color: #666;
        }
        .second {
            width: 2px;
            height: 90px;
            background-color: #e74c3c;
        }
        .center {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: #333;
            transform: translate(-50%, -50%);
        }
        .digital-time {
            font-size: 48px;
            margin-top: 20px;
            color: #333;
        }
        .mode-switch {
            margin-top: 20px;
            padding: 10px 20px;
            font-size: 16px;
            cursor: pointer;
            background-color: #333;
            color: white;
            border: none;
            border-radius: 5px;
            transition: background-color 0.3s;
        }
        .mode-switch:hover {
            background-color: #555;
        }
        .night-mode {
            background-color: #222;
        }
        .night-mode .clock {
            background-color: #333;
            box-shadow: 0 0 20px rgba(255,255,255,0.1);
        }
        .night-mode .hour, .night-mode .minute {
            background-color: #fff;
        }
        .night-mode .second {
            background-color: #e74c3c;
        }
        .night-mode .center {
            background-color: #fff;
        }
        .night-mode .digital-time {
            color: #fff;
        }
        .night-mode .mode-switch {
            background-color: #f0f0f0;
            color: #333;
        }
        .night-mode .mode-switch:hover {
            background-color: #ddd;
        }
    </style>
</head>
<body>
    <div class="clock-container">
        <div class="clock">
            <div class="hand hour"></div>
            <div class="hand minute"></div>
            <div class="hand second"></div>
            <div class="center"></div>
        </div>
        <div class="digital-time"></div>
        <button class="mode-switch">Dark mode</button>
    </div>

    <script>
        function updateClock() {
            const now = new Date();
            const hours = now.getHours();
            const minutes = now.getMinutes();
            const seconds = now.getSeconds();

            const hourDeg = (hours % 12 + minutes / 60) * 30;
            const minuteDeg = (minutes + seconds / 60) * 6;
            const secondDeg = seconds * 6;

            document.querySelector('.hour').style.transform = `translateX(-50%) rotate(${hourDeg}deg)`;
            document.querySelector('.minute').style.transform = `translateX(-50%) rotate(${minuteDeg}deg)`;
            document.querySelector('.second').style.transform = `translateX(-50%) rotate(${secondDeg}deg)`;

            const digitalTime = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')} ${hours >= 12 ? 'PM' : 'AM'}`;
            document.querySelector('.digital-time').textContent = digitalTime;
        }

        function toggleMode() {
            document.body.classList.toggle('night-mode');
            const button = document.querySelector('.mode-switch');
            button.textContent = document.body.classList.contains('night-mode') ? 'Light mode' : 'Dark mode';
        }

        setInterval(updateClock, 1000);
        updateClock(); // 立即更新一次,避免延迟

        document.querySelector('.mode-switch').addEventListener('click', toggleMode);
    </script>
</body>
</html>