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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-view-transitions/input-touch-while-render-blocked.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<title>View transitions: Touch event target during render blocking</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/#document-rendering-suppression-for-view-transitions">
<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>
:root {
/* Ensure clicks during the transition fall through the pseudo tree root to
* real DOM */
view-transition-name: none;
}
::view-transition {
/* Ensure clicks during the transition fall through the pseudo tree root to
* real DOM */
pointer-events: none;
width: 0;
height: 0;
}
::view-transition-group(*) {
animation-duration: 30s;
}
#touchtarget {
width: 100px;
height: 100px;
background: green;
}
#transition {
width: 100px;
height: 100px;
background: blue;
contain: paint;
view-transition-name: transitionElement;
}
</style>
<div id="touchtarget"></div>
<div id="transition"></div>
<script>
const touchTarget = document.getElementById("touchtarget");
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
assert_true(!!touchTarget, "Sanity check: touchTarget element exists");
const watcher = new EventWatcher(t, document, ["touchstart", "touchend"]);
// Need to use a single action to avoid wptrunner implicitly releasing
const action = new test_driver.Actions()
.setContext(window)
.addPointer("touch1", "touch")
.pointerMove(10, 10, { origin: "viewport", sourceName: "touch1" })
.pointerDown({ sourceName: "touch1" })
// Pause to let the touchstart handler run and VT begin render-blocking.
.pause(100)
.pointerUp({ sourceName: "touch1" })
.send();
const touchstartEvt = await watcher.wait_for("touchstart");
assert_equals(touchstartEvt.target, touchTarget, "Action should target touchtarget");
const cbDone = Promise.withResolvers();
const transition = document.startViewTransition(() => cbDone.promise);
const touchendEvt = await watcher.wait_for("touchend");
assert_equals(touchendEvt.target, touchTarget,
"touchend targets touched element despite render-blocking");
cbDone.resolve();
await Promise.all([action, transition]);
}, "Releasing touch during render-blocking targets touched element");
promise_test(async t => {
const watcher = new EventWatcher(t, document, ['touchstart', 'touchend']);
const transition = document.startViewTransition(async () => {
await new test_driver.Actions()
.setContext(window)
.addPointer("touch1", "touch")
.pointerMove(10, 10, {origin: "viewport", sourceName: "touch1"})
.pointerDown({sourceName: "touch1"})
.pointerUp({sourceName: "touch1"})
.send();
});
const touchstartEvt = await watcher.wait_for("touchstart");
const touchendEvt = await watcher.wait_for("touchend");
assert_equals(touchstartEvt.target, document.documentElement, "touchstart targeted root");
assert_equals(touchendEvt.target, document.documentElement, "touchend targeted root");
}, "While render-blocked, new touch targets root");
</script>
</html>