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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-contain/container-queries/top-layer-dialog-container.html - WPT Dashboard Interop Dashboard
<!doctype html>
<title>CSS Container Queries Test: Top layer element as a @container</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
#parent { width: 100px; }
#dialog {
container-type: inline-size;
width: auto;
border: none;
}
#child { color: red; }
@container (min-width: 200px) {
#child { color: green; }
}
</style>
<div id="parent">
<dialog id="dialog"><span id="child"></span></dialog>
</div>
<script>
setup(() => assert_implements_container_queries());
test(() => {
assert_equals(getComputedStyle(child).color, "rgb(255, 0, 0)");
}, "#dialog initially sized by #containing-block");
test(() => {
dialog.showModal();
assert_equals(getComputedStyle(child).color, "rgb(0, 128, 0)");
}, "#dialog sized by viewport");
</script>