jquery 菜单左右移动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 菜单左右移动</title>
    <style>
        #menu {
            overflow: hidden;
            width: 300px;
        }
        .menu-item {
            width: 100px;
            height: 50px;
            background-color: #ccc;
            float: left;
            margin-right: 10px;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div id="menu">
        <div class="menu-item">Item 1</div>
        <div class="menu-item">Item 2</div>
        <div class="menu-item">Item 3</div>
        <div class="menu-item">Item 4</div>
    </div>
    <button id="moveLeft">向左移动</button>
    <button id="moveRight">向右移动</button>

    <script>
        $(document).ready(function() {
            var menu = $('#menu');
            var itemWidth = $('.menu-item').outerWidth(true);
            var totalItems = $('.menu-item').length;
            var maxLeft = -(totalItems - 4) * itemWidth;

            $('#moveLeft').click(function() {
                var currentLeft = parseInt(menu.css('left'), 10);
                if (currentLeft < 0) {
                    menu.animate({ left: currentLeft - itemWidth + 'px' }, 300);
                }
            });

            $('#moveRight').click(function() {
                var currentLeft = parseInt(menu.css('left'), 10);
                if (currentLeft > maxLeft) {
                    menu.animate({ left: currentLeft + itemWidth + 'px' }, 300);
                }
            });
        });
    </script>
</body>
</html>