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<!doctype html>
<title>Containers and inheritance</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-queries">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#outer {
visibility: hidden;
}
#outer.visible {
visibility: visible;
}
#container {
container-type: inline-size;
}
#container.visible {
visibility: visible;
}
</style>
<div id=outer><div id=container><span id=inner>PASS</span></div></div>
<script>
setup(() => assert_implements_container_queries());
test((t) => {
assert_equals(getComputedStyle(inner).visibility, "hidden");
}, "Initial state");
test((t) => {
outer.classList.add("visible");
assert_equals(getComputedStyle(inner).visibility, "visible");
}, "Test that visibility inherits via container after mutation");
test((t) => {
outer.classList.remove("visible");
assert_equals(getComputedStyle(inner).visibility, "hidden");
}, "Return to initial state");
test((t) => {
container.classList.add("visible");
assert_equals(getComputedStyle(inner).visibility, "visible");
}, "Test that visibility inherits from container after mutation");
</script>
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