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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-contain/container-queries/iframe-invalidation.html - WPT Dashboard Interop Dashboard
<!doctype html>
<title>@container-dependent elements respond to iframe size changes</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/cq-testcommon.js"></script>
<style>
iframe {
width: 200px;
height: 40px;
}
</style>
<iframe id=iframe srcdoc="
<style>
div#container {
container-type: size;
height: 20px;
}
div#child { color: red; }
@container (min-width: 300px) {
div#child { color: green; }
}
</style>
<div id=container>
<div id=child>Test</div>
</div>
"></iframe>
<script>
setup(() => assert_implements_container_queries());
function waitForLoad(w) {
return new Promise(resolve => w.addEventListener('load', resolve));
}
promise_test(async () => {
await waitForLoad(window);
let inner_div = iframe.contentDocument.querySelector('div#child');
assert_equals(getComputedStyle(inner_div).color, 'rgb(255, 0, 0)');
iframe.style = 'width:400px';
assert_equals(getComputedStyle(inner_div).color, 'rgb(0, 128, 0)');
})
</script>