<!DOCTYPE html>
<html>
<title>View transitions: author styles ignored during prepare</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">
<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: shared;
}
html::view-transition,
html::view-transition-group(shared),
html::view-transition-image-pair(shared),
html::view-transition-old(shared),
html::view-transition-new(shared) {
background: blue;
}
</style>
<div></div>
<script>
promise_test(async t => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise((resolve, reject) => {
document.startViewTransition(() => {
resolve();
throw 'error';
});
});
}, "An exception thrown during a transition shouldn't crash.");
</script>