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<!DOCTYPE html>
<html>
<title>View transitions: ensure correct style inheritance for pseudo tree</title>
<link rel="help" href="https://github.com/WICG/view-transitions">
<link rel="author" href="mailto:khushalsagar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
::view-transition {
background-color: red;
}
::view-transition-group(*) {
background-color: inherit;
color: blue;
animation-duration: 0.321s;
}
::view-transition-image-pair(*) {
color: inherit;
overflow-x: clip;
}
::view-transition-old(*), ::view-transition-new(*) {
overflow-x: inherit;
}
</style>
<script>
promise_test(() => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition();
transition.ready.then(() => {
assert_equals(getComputedStyle(document.documentElement, ":view-transition").backgroundColor, "rgb(255, 0, 0)", ":view-transition");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").backgroundColor, "rgb(255, 0, 0)", "group");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").color, "rgb(0, 0, 255)", "group");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-group(root)").animationDuration, "0.321s", "group");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").color, "rgb(0, 0, 255)", "wrapper");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").overflowX, "clip", "wrapper");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-image-pair(root)").animationDuration, "0.321s", "wrapper");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").overflowX, "clip", "outgoing");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-old(root)").animationDuration, "0.321s", "outgoing");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-new(root)").overflowX, "clip", "incoming");
assert_equals(getComputedStyle(document.documentElement, ":view-transition-new(root)").animationDuration, "0.321s", "incoming");
});
await transition.finished;
resolve();
});
}, "style inheritance of pseudo elements");
</script>
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