jquery li上下移动

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery List Move</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <ul id="sortableList">
        <li>Item 1 <button class="moveUp">Up</button> <button class="moveDown">Down</button></li>
        <li>Item 2 <button class="moveUp">Up</button> <button class="moveDown">Down</button></li>
        <li>Item 3 <button class="moveUp">Up</button> <button class="moveDown">Down</button></li>
    </ul>

    <script>
        $(document).ready(function() {
            $('.moveUp').click(function() {
                var $currentLi = $(this).closest('li');
                $currentLi.insertBefore($currentLi.prev());
            });

            $('.moveDown').click(function() {
                var $currentLi = $(this).closest('li');
                $currentLi.insertAfter($currentLi.next());
            });
        });
    </script>
</body>
</html>