demo/title_drag.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Title area drag</title>

  <link rel="stylesheet" href="demo.css"/>
  <script src="../dist/gridstack-all.js"></script>
  <style type="text/css">
    .card-header {
      cursor: move;
      min-height: 25px;
    }
    .card-header:hover {
      background-color: rgba(0,0,0,0.1);
    }
    .card {
      text-align: left;
    }
  </style>

</head>
<body>
  <div class="container-fluid">
    <h1>Title area drag</h1>
    <br><br>
    <div class="grid-stack">
      <div class="grid-stack-item" gs-w="3" gs-h="3"><div class="grid-stack-item-content">
        <div class="card-header">- Drag here -</div>
        <div class="card">the rest of the panel content doesn't drag</div>
      </div></div>
    </div>
  </div>
  <script src="events.js"></script>
  <script type="text/javascript">
    let grid = GridStack.init({ handle: '.card-header' }); // drag by the header only
    addEvents(grid);
  </script>
</body>
</html>