【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>