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<!doctype html>
<title>File drag and tab change during prompt for upload</title>
body > div {
height: 200px;
width: 200px;
background-color: orange;
display: inline-block;
<script type="text/javascript">
window.onload = function () {
var orange = document.getElementsByTagName('div')[0];
orange.ondragenter = orange.ondragover = function (e) {
orange.ondrop = function (e) {
document.getElementsByTagName('ol')[0].innerHTML = ( e.dataTransfer.files[0] && e.dataTransfer.files[0].name );
<div draggable="true"></div>
<li>Save <a href="file1.txt">file1.txt</a> and <a href="file2.txt">file2.txt</a> onto your computer.</li>
<li>Open this page in two separate tabs, and start on tab #1.</li>
<li>Drag file1.txt from your computer onto the orange square.</li>
<li>A prompt should appear. Do not dismiss it. If a prompt does not appear, ignore any further steps, and check the tests in ../../file/</li>
<li>Click the other tab to focus it (or focus it in whatever way works). If you cannot change tabs, PASS, and ignore any further steps.</li>
<li>Drag file2.txt from your computer onto the orange square. Fail if this text (but not the orange square) is replaced without any prompt.</li>
<li>If a prompt appears, do not dismiss it.</li>
<li>Return to tab #1.</li>
<li>Accept the prompt. Fail if it cannot be accepted. Pass if this text (but not the orange square) is replaced with the text: file1.txt</li>