<html>
<head>
<title>Droppable plugin</title>
<meta charset="utf-8" />
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://unpkg.com/gijgo@1.9.14/js/gijgo.min.js" type="text/javascript"></script>
<link href="https://unpkg.com/gijgo@1.9.14/css/gijgo.min.css" rel="stylesheet" type="text/css" />
<style>
.draggable {
border: 1px solid #999;
width: 300px;
height: 200px;
text-align: center;
}
.droppable {
border: 1px solid #999;
width: 300px;
height: 200px;
text-align: center;
}
.hover {
background-color: #FF0000;
}
</style>
</head>
<body>
<div id="droppable" class="droppable">Drop Here</div>
<div id="draggable" class="draggable">Drag Me</div>
<script>
$('#draggable').draggable();
$('#droppable').droppable({ hoverClass: 'hover' });
</script>
</body>
</html>