效果如下:
程式碼如下:
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>現代風格時鐘</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 { position: relative; width: 200px; height: 200px; /*將正方形變為圓形*/ border-radius: 50%; background-color: white; border: 1px solid black; /*新增陰影*/ box-shadow: 0 0 20px rgba(0,0,0,0.1); } /*實現時針、分針、秒針繞圓心轉動*/ .hand { /*圓心定位*/ position: absolute; bottom: 50%; left: 50%; /* 設定旋轉元素的基點位置 ,即旋轉軸的位置*/ transform-origin: 50% 100%; /*倒圓角*/ border-radius: 5px; } /*時針*/ .hour { width: 4px; height: 50px; background-color: #333; } /*分針*/ .minute { width: 3px; height: 70px; background-color: #666; } /*秒針*/ .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; // 總共360度,一圈是12個小時,那麼一個小時30度 const minuteDeg = (minutes + seconds / 60) * 6; // 總共360度,一圈是60分鐘,那麼一分鐘6度 const secondDeg = seconds * 6; // 總共360度,一圈是60秒,那麼一秒鐘6度 // 讓時針轉動 document.querySelector('.hour').style.transform = `translateX(-50%) rotate(${hourDeg}deg)`; // 讓分針轉動 document.querySelector('.minute').style.transform = `translateX(-50%) rotate(${minuteDeg}deg)`; // 讓秒針轉動 document.querySelector('.second').style.transform = `translateX(-50%) rotate(${secondDeg}deg)`; // 顯示時間 const digitalTime = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')} ${hours >= 12 ? 'PM' : 'AM'}`; document.querySelector('.digital-time').textContent = digitalTime; } // 切換模式 function toggleMode() { // 使用document.body.classList.toggle('night-mode');的時候,當前元素body有'night-mode'這個類名時刪除這個類名,反之沒有這個類名則新增這個類名到classList的後面 document.body.classList.toggle('night-mode'); const button = document.querySelector('.mode-switch'); // 選擇按鈕 button.textContent = document.body.classList.contains('night-mode') ? 'Light mode' : 'Dark mode'; // 修改內容 } setInterval(updateClock, 1000); // 1000毫秒,即1s鍾執行一次 // updateClock(); // 立即更新一次,避免延遲 // 監聽單擊事件,即單擊就切換模式 document.querySelector('.mode-switch').addEventListener('click', toggleMode); </script> </body> </html>