jquery 背景图切换

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 背景图切换</title>
    <style>
        #bg {
            width: 100%;
            height: 500px;
            background-size: cover;
            background-position: center;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div id="bg"></div>

    <script>
        $(document).ready(function() {
            var images = [
                'image1.jpg',
                'image2.jpg',
                'image3.jpg'
            ];
            var currentIndex = 0;

            function changeBackground() {
                $('#bg').css('background-image', 'url(' + images[currentIndex] + ')');
                currentIndex = (currentIndex + 1) % images.length;
            }

            setInterval(changeBackground, 3000); // 每 3 秒切换一次背景图
        });
    </script>
</body>
</html>