js数字上下滚动效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>数字滚动效果</title>
    <style>
        #number {
            font-size: 48px;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <div id="number">0</div>
    <script>
        const numberElement = document.getElementById('number');
        let currentNumber = 0;
        const targetNumber = 1000; // 目标数字
        const duration = 5000; // 动画持续时间（毫秒）
        const startTime = Date.now();

        function updateNumber() {
            const elapsedTime = Date.now() - startTime;
            const progress = Math.min(elapsedTime / duration, 1);
            currentNumber = Math.floor(progress * targetNumber);
            numberElement.textContent = currentNumber;

            if (progress < 1) {
                requestAnimationFrame(updateNumber);
            }
        }

        requestAnimationFrame(updateNumber);
    </script>
</body>
</html>