<!doctype html>
<title>CSS Container Queries Test: @container queries affecting height affecting percentage padding</title>
<link rel="help" href="https://drafts.csswg.org/css-conditional-5/#container-queries">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#vertical {
width: 500px;
writing-mode: vertical-lr;
}
#padded {
width: 100%;
box-sizing: border-box;
padding-right: 100%;
background-color: orange;
}
#horizontal {
writing-mode: horizontal-tb;
width: 100%;
}
#container {
width: 100%;
container-type: inline-size;
background-color: green;
}
#first, #second { height: 50px; }
@container (width <= 400px) {
#second { display: none; }
}
</style>
<div id="vertical">
<div id="padded">
<div id="horizontal">
<div id="container">
<div id="first"></div>
<div id="second"></div>
</div>
</div>
</div>
</div>
<script>
setup(() => assert_implements_container_queries());
test(() => assert_equals(padded.offsetHeight, 100),
"#container height measured with 500px width. Both container children visible");
test(() => assert_equals(container.offsetWidth, 400),
"#container width 400px after padding is applied.");
test(() => assert_equals(container.offsetHeight, 50),
"#container width 400px after padding is applied. #second is removed from the rendering");
// Reduce width by 1px to test that a re-layout is not stateful.
vertical.style.width = "499px";
test(() => assert_equals(padded.offsetHeight, 100),
"#container height measured with 499px width. Both container children visible");
test(() => assert_equals(container.offsetWidth, 399),
"#container width 399px after padding is applied. #second is removed from the rendering");
test(() => assert_equals(container.offsetHeight, 50),
"#container width 399x after padding is applied. #second is removed from the rendering");
</script>
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