jquery 层拖拽

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Drag and Drop</title>
    <style>
        .container {
            width: 300px;
            height: 200px;
            border: 1px solid #ccc;
            padding: 10px;
        }
        .draggable {
            width: 50px;
            height: 50px;
            background-color: #f00;
            margin: 5px;
            cursor: move;
        }
    </style>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
</head>
<body>
    <div class="container">
        <div class="draggable">1</div>
        <div class="draggable">2</div>
        <div class="draggable">3</div>
    </div>

    <script>
        $(function() {
            $(".draggable").draggable({
                revert: true,
                containment: ".container"
            });
        });
    </script>
</body>
</html>