<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link type="text/css" rel="stylesheet" href="../js/jquery-ui-1.12.1/jquery-ui.css">
    <script src="../js/jquery-3.5.1.js"></script>
    <script src="../js/jquery-ui-1.12.1/jquery-ui.js"></script>
    <style type="text/css">
        body {
            font-size: 13px;
        }
        div {
            margin: 5px;
        }
        .divFrame {
            border: 1px dashed #CCCCCC;
            background-color: #EEEEEE;
            height: 69px;
            width: 200px;
        }
        .divDrag{
            border: 1px solid #CCCCCC;
            background-color: #EEEEEE;
            cursor: move;
            width: 40px;
            padding: 20px;
            text-align: center;
        }
    </style>
    <script>
        $(function () {
           $("#divDragD").draggable({opacity:0.35});
           $("#divDragX").draggable({axis:"x",opacity: 0.35});
           $("#divDragC").draggable({
               containment:"parent",
               opacity:0.35,
               revert:true
           });
        });
    </script>
</head>
<body>
    <div id="divDragD" class="divDrag">随意</div>
    <div class="divFrame">
        <div id="divDragX" class="divDrag">X轴</div>
    </div>
    <div class="divFrame">
        <div id="divDragC" class="divDrag">父窗口</div>
    </div>
</body>
</html>