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<!doctype html>
<meta charset="utf-8">
<title>CSSOM: getComputedStyle gets invalidated for display: none elements (rules)</title>
<link rel="help" href="https://drafts.csswg.org/cssom/#dom-window-getcomputedstyle">
<link rel="help" href="https://bugs.webkit.org/show_bug.cgi?id=186882">
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
#undisplayed {
display: none;
color: red;
}
.sibling + #undisplayed {
color: green;
}
.sibling + #undisplayed > div {
color: yellow;
}
</style>
<div id="helper"></div>
<div id="undisplayed"><div id="child"></div></div>
<script>
test(function() {
let undisplayed_style = getComputedStyle(undisplayed);
let undisplayed_child_style = getComputedStyle(child);
assert_equals(undisplayed_style.color, "rgb(255, 0, 0)");
assert_equals(undisplayed_child_style.color, "rgb(255, 0, 0)");
helper.classList.add("sibling");
assert_equals(undisplayed_style.color, "rgb(0, 128, 0)");
assert_equals(undisplayed_child_style.color, "rgb(255, 255, 0)");
}, "getComputedStyle gets invalidated in display: none subtrees due to rule matching changes");
</script>
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