<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Selection drag and drop roundtrip</title>
</head>
<body onload="window.getSelection().selectAllChildren(document.querySelector('span'))">
<p><span ondragenter="event.preventDefault()" ondragover="return false" ondrop="document.querySelector('span').firstChild.nodeValue = (event.dataTransfer.getData('text/plain') == 'Drag me')?'PASS':'FAIL'">Drag me</span></p>
<p>Drag selected text outside browser window and then drag it back and drop on itself. You should see word PASS once you drop it.</p>
</body>
</html>