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<?xml version="1.0" encoding="utf-8"?>
<head>
<title>Changing iframe content during drag and drop of text input selection</title>
<style type="text/css">
iframe
{height:100px;
width:300px;
border:solid medium navy;}
</style>
</head>
<body ondragenter="event.preventDefault();document.querySelector('iframe').src = 'data:text/plain,Drop%20selection%20outside%20this%20frame'" ondragover="return false" ondrop="document.querySelector('p').firstChild.nodeValue = (event.dataTransfer.getData('text/plain') == 'Drag me')?'PASS':'FAIL'">
<iframe src="helper-drag-me-input.xhtml">XHTML document</iframe>
<p>Drag selection above out of frame and drop it somewhere on the page. You should see word PASS once you drop it.</p>
</body>
</html>