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<!doctype html>
<title>Removing drop targetted document before the queue is processed</title>
span, iframe {
height: 200px;
width: 200px;
background-color: orange;
display: inline-block;
border: none;
<script type="text/javascript">
window.onload = function () {
var orange = document.getElementsByTagName('span')[0];
orange.ondragstart = function (e) {
e.dataTransfer.setData('text','dummy text');
e.dataTransfer.effectAllowed = 'all';
document.getElementsByTagName('iframe')[0].contentWindow.postMessage('dummy message','*');
setTimeout(function () {
<p><span draggable="true"></span> <iframe height="200" width="200" src="022-1.html"></iframe></p>
<p>Drag the orange square over the blue square, then release it. Wait 5 seconds for the blue square to disappear. Pass if you can select this text.</li>
<noscript><p>Enable JavaScript and reload</p></noscript>