jquery 二级菜单导航

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 二级菜单导航</title>
    <style>
        .menu {
            list-style: none;
            padding: 0;
        }
        .menu li {
            display: inline-block;
            position: relative;
        }
        .submenu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #fff;
            border: 1px solid #ccc;
            padding: 10px;
        }
    </style>
</head>
<body>
    <ul class="menu">
        <li><a href="#">菜单1</a>
            <ul class="submenu">
                <li><a href="#">子菜单1-1</a></li>
                <li><a href="#">子菜单1-2</a></li>
            </ul>
        </li>
        <li><a href="#">菜单2</a>
            <ul class="submenu">
                <li><a href="#">子菜单2-1</a></li>
                <li><a href="#">子菜单2-2</a></li>
            </ul>
        </li>
    </ul>

    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(document).ready(function() {
            $('.menu > li').hover(
                function() {
                    $(this).find('.submenu').slideDown(200);
                },
                function() {
                    $(this).find('.submenu').slideUp(200);
                }
            );
        });
    </script>
</body>
</html>

$(document).ready(function() {
    $('.menu > li').hover(
        function() {
            $(this).find('.submenu').slideDown(200);
        },
        function() {
            $(this).find('.submenu').slideUp(200);
        }
    );
});