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<!DOCTYPE html>
<html>
<title>View transitions: ensure input targets document root while rendering is suppressed</title>
<link rel="help" href="https://github.com/WICG/view-transitions">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7797">
<link rel="author" href="mailto:bokan@chromium.org">
<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;
}
#clicktarget {
width: 100px;
height: 100px;
background: red;
}
#transition {
width: 100px;
height: 100px;
background: blue;
contain: paint;
view-transition-name: transitionElement;
}
</style>
<div id="clicktarget"></div>
<div id="transition"></div>
<script>
const target = document.getElementById("clicktarget");
async function sendAndWaitForClick() {
return new Promise(async (resolve) => {
function eventHandler(ev) {
resolve(ev);
}
document.documentElement.addEventListener("click", eventHandler);
await new test_driver.Actions()
.setContext(window)
.addPointer("mousePointer1", "mouse")
.pointerMove(10, 10, {origin: 'viewport', sourceName: "mousePointer1"})
.pointerDown({sourceName: "mousePointer1"})
.pointerUp({sourceName: "mousePointer1"})
.send();
document.documentElement.removeEventListener("click", eventHandler);
});
}
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
assert_not_equals(target, null, "PRECONDITION: target element is valid");
// Ensure input is initialized before blocking rendering.
await new test_driver.Actions()
.setContext(window)
.addPointer("mousePointer1", "mouse")
.pointerMove(0, 0, {origin: "viewport", sourceName: "mousePointer1"})
.send();
let clickEvent = null;
let transition = document.startViewTransition(async () => {
clickEvent = await sendAndWaitForClick();
});
await transition.ready;
assert_equals(clickEvent.target, document.documentElement,
"Events must target the transition root while render blocked");
clickEvent = null;
clickEvent = await sendAndWaitForClick();
// This just ensures we're not passing the above check by accident.
assert_equals(clickEvent.target, target,
"During transition, event should hit real DOM");
}, "Input when rendering suppressed targets root");
</script>
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