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<!doctype html>
<title>CSS Container Queries Test: @container with modal dialog child</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>
#container {
container-type: inline-size;
}
dialog {
color: red;
}
@container (max-width: 200px) {
dialog { color: green; }
}
@container (max-width: 100px) {
dialog { color: lime; }
}
</style>
<div id="container">
<dialog id="dialog"></dialog>
</div>
<script>
setup(() => assert_implements_size_container_queries());
test(() => {
assert_equals(getComputedStyle(dialog).color, "rgb(255, 0, 0)");
}, "#container initially wider than 200px");
test(() => {
container.style.width = "200px";
assert_equals(getComputedStyle(dialog).color, "rgb(0, 128, 0)");
}, "#container changed to 200px");
test(() => {
dialog.showModal();
assert_equals(getComputedStyle(dialog).color, "rgb(0, 128, 0)");
}, "Modal dialog still has parent as query container while in top layer");
test(() => {
container.style.width = "100px";
assert_equals(getComputedStyle(dialog).color, "rgb(0, 255, 0)");
}, "Container changes width while dialog is in top layer");
</script>
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