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<!DOCTYPE html>
<html>
<title>View transitions: check pseudo element's default styles</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:vmpstr@chromium.org">
<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;
mix-blend-mode: multiply;
text-orientation: upright;
color-scheme: dark light;
}
::view-transition-image-pair(target) {
position: fixed;
}
</style>
<div id=target></div>
<script>
promise_test(() => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition(() => {
assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed", "::view-transition");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute", "container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply", "container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright", "container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light", "container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "absolute", "wrapper(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute", "outgoing(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute", "container(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").mixBlendMode, "normal", "container(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute", "wrapper(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute", "outgoing(root)");
requestAnimationFrame(() => {
assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed", "raf ::view-transition");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute", "raf container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply", "raf container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright", "raf container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light", "raf container(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "fixed", "raf wrapper(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute", "raf outgoing(target)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute", "raf container(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").mixBlendMode, "normal", "raf container(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute", "raf wrapper(root)");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute", "raf outgoing(root)");
});
});
await transition.finished;
resolve();
});
}, "position property of pseudo elements");
promise_test(() => {
assert_implements(document.startViewTransition, "Missing document.startViewTransition");
return new Promise(async (resolve, reject) => {
let transition = document.startViewTransition(() => {
assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute");
target.remove();
});
await transition.ready;
assert_equals(getComputedStyle(document.documentElement, "::view-transition").position, "fixed");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").mixBlendMode, "multiply");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").textOrientation, "upright");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").colorScheme, "dark light");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(target)").position, "fixed");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-new(target)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-image-pair(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-old(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-new(root)").position, "absolute");
assert_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
await transition.finished;
// With custom ua sheets not applying to non-existing pseudo, the value should be the default (not absolute)
assert_not_equals(getComputedStyle(document.documentElement, "::view-transition-group(target)").position, "absolute");
resolve();
});
}, "properties of pseudo elements outside of transition");
</script>
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