<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Adding element to datastore during drag and drop of block element</title>
<style type="text/css">
div
	{width:100px;
	height:100px;
	background-color:navy;}
span
	{color:green;
	background-color:yellow;}
</style>
<script type="application/ecmascript">
function start(event)
	{event.dataTransfer.effectAllowed = 'copy';
	event.dataTransfer.addElement(document.querySelector('span'));}
</script>
</head>
<body>
<div draggable="true" ondragstart="start(event)"/>
<p>Try to drag blue box above. You should see word <span>PASS</span> in feedback overlay.</p>
</body>
</html>