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<!doctype html>
<title>Modifier keys being released before drop</title>
<style type="text/css">
div:first-child {
height: 100px;
width: 100px;
background: orange;
display: inline-block;
div:first-child + div {
height: 100px;
width: 100px;
background: blue;
display: inline-block;
div:first-child + div + div {
height: 100px;
width: 100px;
background: fuchsia;
display: inline-block;
div {
font-family: monospace;
table {
display: inline-table;
margin-right: 1em;
border-collapse: collapse;
table, th, td {
border: 1px solid black;
thead th {
background: silver;
color: black;
<script type="text/javascript">
window.onload = function () {
var bde, bdo, bdo2, fde, fdo, fdo2, fdr;
var orange = document.getElementsByTagName('div')[0];
orange.ondragstart = function (e) {
e.dataTransfer.effectAllowed = 'linkMove';
bde = bdo = bdo2 = fde = fdo = fdo2 = fdr = '';
var blue = document.getElementsByTagName('div')[1];
blue.ondragenter = function (e) {
bde = e.dataTransfer.dropEffect;
blue.ondragover = function (e) {
if( !bdo ) {
bdo = e.dataTransfer.dropEffect;
//bdo2 always collects dropEffect, since it can change multiple times in rapid succession when pressing multiple modifiers
//test cares about the last dropEffect that was seen before leaving the blue square, and that will be stored in bdo2
bdo2 = e.dataTransfer.dropEffect;
var fuchsia = document.getElementsByTagName('div')[2];
fuchsia.ondragenter = function (e) {
fde = e.dataTransfer.dropEffect;
fuchsia.ondragover = function (e) {
if( !fdo ) { fdo = e.dataTransfer.dropEffect; }
fdo2 = e.dataTransfer.dropEffect;
fuchsia.ondrop = function (e) {
fdr = e.dataTransfer.dropEffect;
orange.ondragend = function (e) {
var sequence = ([bde,bdo,bdo2,fde,fdo,fdo2,fdr,e.dataTransfer.dropEffect]).join('=&gt;')
var desiredsequence = (['link','link','move','move','move','link','link','link']).join('=&gt;')
if( sequence == desiredsequence ) {
document.getElementsByTagName('div')[3].innerHTML = 'PASS';
} else {
document.getElementsByTagName('div')[3].innerHTML = 'FAIL, got:<br>'+sequence+'<br>instead of:<br>'+desiredsequence;
<div draggable="true"></div>
<li>Drag the orange square over the blue square</li>
<li>Press the relevant modifier keys for your platform to request a &quot;move&quot; drop effect (eg. Shift on Windows/Unix/Linux, Command on Mac)</li>
<li>If supported by the platform, the mouse cursor should show that a &quot;move&quot; drop effect will be used</li>
<li>Continue dragging over the pink square</li>
<li>Release the modifier keys, and wait for at least half a second</li>
<li>If supported by the platform, the mouse cursor should show that a &quot;link&quot; drop effect will be used</li>
<li>Release the drag, then the keys</li>
<li>Fail if no new text appears above this list</li>
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