jquery 钟表

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Clock</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <style>
        #clock {
            font-size: 48px;
            text-align: center;
        }
    </style>
</head>
<body>
    <div id="clock"></div>

    <script>
        function updateClock() {
            const now = new Date();
            const hours = String(now.getHours()).padStart(2, '0');
            const minutes = String(now.getMinutes()).padStart(2, '0');
            const seconds = String(now.getSeconds()).padStart(2, '0');
            $('#clock').text(`${hours}:${minutes}:${seconds}`);
        }

        setInterval(updateClock, 1000);
        updateClock(); // 初始化时钟
    </script>
</body>
</html>

let lastUpdate = Date.now();

function updateClock() {
    const now = new Date();
    const elapsed = now - lastUpdate;
    const delay = 1000 - (elapsed % 1000);
    setTimeout(updateClock, delay);
    lastUpdate = now;

    const hours = String(now.getHours()).padStart(2, '0');
    const minutes = String(now.getMinutes()).padStart(2, '0');
    const seconds = String(now.getSeconds()).padStart(2, '0');
    $('#clock').text(`${hours}:${minutes}:${seconds}`);
}

updateClock(); // 初始化时钟