HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery .offsetParent() — drag</title>

  <style>

    .panel {

      position: relative;

      width: 280px;

      padding: 16px;

      border: 1px solid #999;

      margin: 20px;

    }

    .drag-handle {

      display: inline-block;

      padding: 6px 12px;

      background: #333;

      color: #fff;

      cursor: move;

      border-radius: 4px;

    }

    .drag-boundary { background: #fff8e1; outline: 2px dashed #ff9800; }

  </style>

</head>

<body>

  <div class="panel">

    <span class="drag-handle">Drag me</span>

    <p>Movement is calculated relative to this panel.</p>

  </div>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $(".drag-handle").offsetParent().addClass("drag-boundary");

  </script>

</body>

</html>

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jQuery .offsetParent() — drag boundary (Try It)