HTML 计时器

HTML计时器的实现与修改建议

原创已于 2025-07-04 11:03:52 修改 · 281 阅读

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HTML 计时器

以下是一个简单的HTML计时器实现，包含开始、暂停和重置功能：

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计时器</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
            background-color: #f5f5f5;
        }
        
        .timer-container {
            text-align: center;
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        .display {
            font-size: 4rem;
            margin-bottom: 20px;
            color: #333;
        }
        
        .buttons {
            display: flex;
            gap: 10px;
            justify-content: center;
        }
        
        button {
            padding: 10px 20px;
            font-size: 1rem;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        #start {
            background-color: #4CAF50;
            color: white;
        }
        
        #pause {
            background-color: #f39c12;
            color: white;
        }
        
        #reset {
            background-color: #e74c3c;
            color: white;
        }
        
        button:hover {
            opacity: 0.9;
        }
    </style>
</head>
<body>
    <div class="timer-container">
        <h1>计时器</h1>
        <div class="display" id="display">00:00:00</div>
        <div class="buttons">
            <button id="start">开始</button>
            <button id="pause">暂停</button>
            <button id="reset">重置</button>
        </div>
    </div>

    <script>
        let timer;
        let hours = 0;
        let minutes = 0;
        let seconds = 0;
        
        const display = document.getElementById('display');
        const startBtn = document.getElementById('start');
        const pauseBtn = document.getElementById('pause');
        const resetBtn = document.getElementById('reset');
        
        function updateDisplay() {
            display.textContent = 
                `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
        }
        
        function startTimer() {
            timer = setInterval(() => {
                seconds++;
                if (seconds === 60) {
                    seconds = 0;
                    minutes++;
                }
                if (minutes === 60) {
                    minutes = 0;
                    hours++;
                }
                updateDisplay();
            }, 1000);
            
            startBtn.disabled = true;
            pauseBtn.disabled = false;
        }
        
        function pauseTimer() {
            clearInterval(timer);
            startBtn.disabled = false;
            pauseBtn.disabled = true;
        }
        
        function resetTimer() {
            clearInterval(timer);
            hours = 0;
            minutes = 0;
            seconds = 0;
            updateDisplay();
            startBtn.disabled = false;
            pauseBtn.disabled = true;
        }
        
        startBtn.addEventListener('click', startTimer);
        pauseBtn.addEventListener('click', pauseTimer);
        resetBtn.addEventListener('click', resetTimer);
        
        // 初始化按钮状态
        pauseBtn.disabled = true;
    </script>
</body>
</html>