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<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Selection drag and drop: removing dropzone attribute ondragstart</title>
<style type="text/css">
div
{display:inline-block;
vertical-align:top;
background-color:maroon;
color:white;
padding:20px;
width:100px;
height:100px;}
div:nth-child(2)
{background-color:purple;}
div:nth-child(3)
{background-color:fuchsia;}
</style>
<script type="application/ecmascript">
function selectText()
{window.getSelection().selectAllChildren(document.querySelector('p'))}
function dropSelection(event,element)
{document.querySelectorAll('div')[element].appendChild(document.createTextNode(' FAIL '));
selectText();}
function start(event)
{for(var i = 0; i != 3; i++)
{document.querySelectorAll('div')[i].removeAttribute('dropzone')}
}
</script>
</head>
<body onload="selectText()">
<div ondrop="dropSelection(event,0)" dropzone="copy string:text/plain"/>
<div ondrop="dropSelection(event,1)" dropzone="move string:text/plain"/>
<div ondrop="dropSelection(event,2)" dropzone="link string:text/plain"/>
<p ondragstart="start(event)">Drag me</p>
<p>You should not be able to drop selection onto any of the red boxes above.</p>
</body>
</html>
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