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<!doctype html>
<title>CSS Container Queries Test: Deeply nested inline-size container queries</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 id="test_style">
.container { container-type: inline-size; }
#outer { width: 200px; }
</style>
<div id="outer" class="container"></div>
<script>
setup(() => {
assert_implements_container_queries();
// Create 50 nested inline-size containers where a child container is 1px
// narrower than its parent
let sheet = test_style.sheet;
let container = outer;
for (let width = 200; width > 150; --width) {
sheet.insertRule(`
@container (width = ${width}px) {
.container { max-width: ${width-1}px; }
}
`);
let child = document.createElement("div");
child.className = "container";
container.appendChild(child);
container = child;
}
});
test(() => {
let expected_width = 200;
for (let container of document.querySelectorAll(".container"))
assert_equals(container.offsetWidth, expected_width--);
}, "Test that all container widths match");
</script>
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