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<!DOCTYPE html>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<style type="text/css">
button {
color: blue;
#target-wrap {
position: relative;
background-color: lightgrey;
width: 200px;
height: 100px;
border: grey 1px solid;
#target {
position: relative;
background-color: lightyellow;
width: 100px;
height: 30px;
border: yellow 1px solid;
#status-log {
margin: 10px 0;
color: green;
<p>This test validates that pointer lock will be lost when the target is disconnected.</p>
<h2>Manual Test Steps:</h2>
<li>Click the "lockTarget" button to request a pointer lock.</li>
<li>Test is done.</li>
<button id="Button" onclick="lockTarget();">lockTarget</button>
<div id="target-wrap">
<div id="status-log">Click the "lockTarget" button.</div>
<div id="target">Target</div>
<div id="log"></div>
<script type="text/javascript" >
var target = document.querySelector('#target'),
target_wrap = document.querySelector('#target-wrap')
status_log = document.querySelector('#status-log');
var removeTargetTest = async_test("Test that pointer lock will be lost when taking the target element out of the DOM.");
document.addEventListener("pointerlockchange", function() {
if(document.pointerLockElement) {
status_log.innerHTML = "Target is locked!";
} else {
status_log.innerHTML = "Pointer lock exited!";
removeTargetTest.step(function() {
assert_equals(document.pointerLockElement, null, "Pointer lock exited!");
function lockTarget() {
// Inject mouse inputs.
new test_driver.Actions()
.pointerMove(0, 0, {origin: Button})