jquery 左右展开

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 左右展开示例</title>
    <style>
        #sidebar {
            width: 200px;
            height: 100%;
            background-color: #333;
            position: fixed;
            top: 0;
            left: -200px;
            transition: left 0.3s ease-in-out;
        }
    </style>
</head>
<body>
    <button id="toggleButton">展开/收缩</button>
    <div id="sidebar">
        <ul>
            <li>菜单项1</li>
            <li>菜单项2</li>
            <li>菜单项3</li>
        </ul>
    </div>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            $('#toggleButton').click(function() {
                var sidebar = $('#sidebar');
                if (sidebar.css('left') === '-200px') {
                    sidebar.animate({left: '0px'}, 300);
                } else {
                    sidebar.animate({left: '-200px'}, 300);
                }
            });
        });
    </script>
</body>
</html>