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<!doctype html>
<title>CSS Container Queries Test: counters inside container should not affect container size via flex layout</title>
<link rel="help" href="https://drafts.csswg.org/css-contain-3/#container-type">
<link rel="stylesheet" href="/fonts/ahem.css">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#flex {
width: 200px;
display: flex;
flex-direction: row;
counter-reset: my-count 0;
}
/* #item1 grows to use remaining space given #item2's content */
#item1 {
flex-grow: 1;
height: 100px;
}
#container {
container-type: size;
}
#item2 {
flex-grow: 0;
font: 50px/1 Ahem;
}
/* #item2 size depends on generated content which depends on my-count
counter. */
#item2::before {
display: inline-block;
content: counter(my-count);
}
/* The counter-increment inside the container should not affect the size of
#item2 because of style containment. Otherwise we would have a
circularity. */
@container (min-width: 125px) {
#inner {
counter-increment: my-count 10;
background-color: green;
}
}
</style>
<div id="flex">
<div id="item1">
<div id="container">
<div id="inner"></div>
</div>
</div>
<div id="item2"></div>
</div>
<script>
setup(() => assert_implements_container_queries());
const item1_width = parseInt(getComputedStyle(item1).width);
const item2_width = parseInt(getComputedStyle(item2).width);
const container_width = parseInt(getComputedStyle(container).width);
const inner_width = parseInt(getComputedStyle(inner).width);
test(() => {
assert_equals(item1_width, container_width);
assert_equals(item1_width, inner_width);
}, "#item1, #container, and #inner should all have the same width: " + item1_width);
test(() => {
let expected_background = container_width >= 125 ? "rgb(0, 128, 0)" : "rgba(0, 0, 0, 0)";
assert_equals(getComputedStyle(inner).backgroundColor, expected_background);
}, "The container query should match the layed out width");
test(() => {
assert_equals(item1_width + item2_width, 200);
}, "The sum of the item widths should match the flexbox width");
test(() => {
assert_equals(parseInt(getComputedStyle(item2, "::before").width), item2_width);
}, "The size of the flex item #2 should be given by its contents");
</script>
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