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Test Info: Warnings

<!doctype html>
<title>Lostpointercapture triggers first and asynchronously</title>
<meta name="assert" content="TA5.2.10: A user agent must fire a pointer event named lostpointercapture after pointer capture is released for a pointer. This event must be fired prior to any subsequent events for the pointer after capture was released. This event is fired at the element from which pointer capture was removed;">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" type="text/css" href="pointerevent_styles.css">
<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>
<script src="pointerevent_support.js"></script>
<body onload="run()">
<h1>Pointer Events capture test - lostpointercapture order</h1>
Test Description:
This test checks if lostpointercapture is handled asynchronously and prior to all subsequent events.
Complete the following actions:
<li>Press and hold left mouse button over "Set Capture" button and move a little. "gotpointercapture" should be logged inside of the black rectangle
<li>"lostpointercapture" should be logged inside of the black rectangle after pointerup
Test passes if lostpointercapture is dispatched after releasing the mouse button and before any additional pointer events.
<div id="target0" style="background:black; color:white"></div>
<input type="button" id="btnCapture" value="Set Capture">
<script type='text/javascript'>
var detected_pointertypes = {};
var detected_pointerEvents = new Array();
var pointerdown_event = null;
var firstPointermoveReceived = false; // To handle the first pointermove right after gotpointercapture which gotpointercapture was sent right before it.
var firstPointeroverReceived = false; // To handle the first pointerover right after gotpointercapture which gotpointercapture was sent right before it.
var firstPointerenterReceived = false; // To handle the first pointeenter right after gotpointercapture which gotpointercapture was sent right before it.
var test_pointerEvent = async_test("lostpointercapture is dispatched prior to subsequent events"); // set up test harness
var isPointerCapture = false;
var count=0;
var testStarted = false;
var eventRcvd = false;
var isAsync = false;
var event_log = [];
var actions_promise;
function end_of_test() {
var target0 = document.getElementById('target0');
var captureButton = document.getElementById('btnCapture');
function run() {
on_event(captureButton, 'pointerdown', function(event) {
detected_pointertypes[event.pointerType] = true;
pointerdown_event = event;
if(isPointerCapture == false) {
isPointerCapture = true;
captureButton.value = 'Release Capture';
// TA5.1.3.1: Process Pending Pointer Capture
// Whenever a user agent is to fire a Pointer Event that is not gotpointercapture or lostpointercapture,
// it must first run the steps of processing pending pointer capture
// TA5.2.12: The lostpointercapture event
// After pointer capture is released for a pointer, and prior to any subsequent events for the pointer,
// the lostpointercapture event must be dispatched to the element from which pointer capture was removed.
// listen to all events
for (var i = 0; i < All_Pointer_Events.length; i++) {
on_event(target0, All_Pointer_Events[i], function (event) {
// if the event was gotpointercapture, just log it and return
if (event.type == "gotpointercapture") {
testStarted = true;
isAsync = true;
else if (event.type == "lostpointercapture") {
captureButton.value = 'Set Capture';
isPointerCapture = false;
// TA: 11.2
test_pointerEvent.step(function () {
assert_true(isAsync, "lostpointercapture must be fired asynchronously");
// if any events except pointerup have been received with same pointerId before lostpointercapture, then fail
var eventsRcvd_str = "";
if (eventRcvd) {
eventsRcvd_str = "Events received before lostpointercapture: ";
for (var i = 0; i < detected_pointerEvents.length; i++) {
eventsRcvd_str += detected_pointerEvents[i] + ", ";
test_pointerEvent.step(function () {
assert_false(eventRcvd, "no other events should be received before lostpointercapture." + eventsRcvd_str);
assert_equals(event.pointerId, pointerdown_event.pointerId, "pointerID is same for pointerdown and lostpointercapture");
// Make sure the test finishes after all the input actions are completed.
actions_promise.then( () => {
else {
if (testStarted && pointerdown_event != null && pointerdown_event.pointerId === event.pointerId) {
if (event.type == "pointermove" && !firstPointermoveReceived) {
firstPointermoveReceived = true;
else if (event.type == "pointerenter" && !firstPointerenterReceived) {
firstPointerenterReceived = true;
else if (event.type == "pointerover" && !firstPointeroverReceived) {
firstPointeroverReceived = true;
else if (event.type != "pointerup") {
eventRcvd = true;
// Inject mouse inputs.
actions_promise = new test_driver.Actions()
.pointerMove(0, 0, {origin: captureButton})
.pointerMove(2, 0, {origin: captureButton})
.pointerMove(5, 0, {origin: captureButton})
<h1>Pointer Events Capture Test</h1>
<div id="complete-notice">
<p>The following pointer types were detected: <span id="pointertype-log"></span>.</p>
<p>The following events were logged: <span id="event-log"></span>.</p>
<div id="log"></div>