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<!doctype html>
<title>Nested @container-dependent elements respond to outer container size changes</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#size-container">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#outer {
container-type: size;
container-name: outer;
width: 100px;
height: 100px;
}
/* Note that it's intentional that nothing queries this container. */
#inner {
container-type: size;
width: 42px;
height: 42px;
}
@container (width > 90px) {
#outer_child {
--outer:true;
}
}
@container outer (width > 70px) {
#inner_child {
--inner:true;
}
}
</style>
<div id=outer>
<div id=outer_child></div>
<div id=inner>
<div id=inner_child></div>
</div>
</div>
<script>
setup(() => assert_implements_container_queries());
test(function() {
assert_equals(getComputedStyle(outer_child).getPropertyValue('--outer'), 'true');
assert_equals(getComputedStyle(inner_child).getPropertyValue('--inner'), 'true');
outer.style.width = '80px';
assert_equals(getComputedStyle(outer_child).getPropertyValue('--outer'), '');
assert_equals(getComputedStyle(inner_child).getPropertyValue('--inner'), 'true');
outer.style.width = '60px';
assert_equals(getComputedStyle(outer_child).getPropertyValue('--outer'), '');
assert_equals(getComputedStyle(inner_child).getPropertyValue('--inner'), '');
outer.style.width = '100px';
assert_equals(getComputedStyle(outer_child).getPropertyValue('--outer'), 'true');
assert_equals(getComputedStyle(inner_child).getPropertyValue('--inner'), 'true');
}, 'Queries that skip a container are invalidated correctly');
</script>
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