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<!DOCTYPE html>
<meta name="timeout" content="long">
<html>
<title>View transitions: rAF is not issued while render-blocked</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/dom/events/scrolling/scroll_support.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div {
width: 100px;
height: 100px;
background: blue;
contain: paint;
view-transition-name: target;
}
</style>
<div id=target></div>
<script>
let renderBlocked = true;
promise_test(async () => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
await waitForCompositorReady();
return new Promise(async (resolve, reject) => {
requestAnimationFrame(() => {
document.startViewTransition(() => {
return new Promise(async (inner_resolve) => {
step_timeout(() => {
renderBlocked = false;
inner_resolve();
}, 1000);
});
});
requestAnimationFrame(() => {
if (renderBlocked)
reject();
else
resolve();
});
});
});
}, "rAF is blocked until prepare callback");
</script>
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