jquery 导航菜单选中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>导航菜单示例</title>
    <style>
        .nav-item {
            display: inline-block;
            padding: 10px;
            margin-right: 10px;
            cursor: pointer;
        }
        .active {
            background-color: #4CAF50;
            color: white;
        }
    </style>
</head>
<body>
    <div id="nav">
        <div class="nav-item" data-target="home">首页</div>
        <div class="nav-item" data-target="about">关于我们</div>
        <div class="nav-item" data-target="contact">联系我们</div>
    </div>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            // 假设当前页面是 'about'
            var currentPage = 'about';

            // 设置选中状态
            $('.nav-item').each(function() {
                if ($(this).data('target') === currentPage) {
                    $(this).addClass('active');
                }
            });
        });
    </script>
</body>
</html>