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<!DOCTYPE html>
<title>CSS Conditional Test: @container anchored(fallback) matching <position-area></title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-position-2/#anchored-container-queries">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-conditional/container-queries/support/cq-testcommon.js"></script>
<style>
#anchor {
anchor-name: --a;
width: 100px;
height: 100px;
}
#anchored {
position: absolute;
position-anchor: --a;
position-area: top;
position-try-fallbacks: bottom;
width: 100px;
/* Too tall to fit over the anchor to trigger fallback */
height: 100px;
container-type: anchored;
}
#target {
/* Logical values are resolved against anchored / anchor container elements.
Changing the writing-mode for the target should have no effect. */
writing-mode: vertical-lr;
@container anchored(fallback: bottom) { --bottom: yes; }
@container anchored(fallback: span-all bottom) { --span-all-bottom: yes; }
@container anchored(fallback: block-end) { --block-end: yes; }
@container anchored(fallback: block-end span-all) { --block-end-span-all: yes; }
@container anchored(fallback: self-block-end) { --self-block-end: yes; }
@container anchored(fallback: span-all self-block-end) { --span-all-self-block-end: yes; }
}
</style>
<div id="anchor"></div>
<div id="anchored">
<div id="target"></div>
</div>
<script>
test(() => {
const style = getComputedStyle(target);
assert_equals(style.getPropertyValue("--bottom"), "yes");
assert_equals(style.getPropertyValue("--span-all-bottom"), "yes");
assert_equals(style.getPropertyValue("--block-end"), "yes");
assert_equals(style.getPropertyValue("--block-end-span-all"), "yes");
assert_equals(style.getPropertyValue("--self-block-end"), "yes");
assert_equals(style.getPropertyValue("--span-all-self-block-end"), "yes");
}, "@container anchored(fallback) with <position-area> fallback applied");
</script>
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