jquery下拉框左右选择

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery 下拉框左右选择</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <style>
        .selected {
            background-color: #f0f0f0;
        }
    </style>
</head>
<body>
    <select id="leftSelect" multiple size="10">
        <option value="1">选项1</option>
        <option value="2">选项2</option>
        <option value="3">选项3</option>
    </select>
    <div>
        <button id="moveRight"> > </button>
        <button id="moveLeft"> < </button>
    </div>
    <select id="rightSelect" multiple size="10"></select>

    <script>
        $(document).ready(function() {
            $('#moveRight').click(function() {
                $('#leftSelect option:selected').each(function() {
                    $(this).remove().appendTo('#rightSelect').addClass('selected');
                });
            });

            $('#moveLeft').click(function() {
                $('#rightSelect option:selected').each(function() {
                    $(this).remove().appendTo('#leftSelect').removeClass('selected');
                });
            });
        });
    </script>
</body>
</html>