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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/css-anchor-position/container-queries/anchored-fallback-basic.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<title>CSS Conditional Test: Basic @container anchored(fallback) support</title>
<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>
body { margin: 0; }
#anchor {
anchor-name: --a;
margin-top: 100px;
width: 100px;
height: 100px;
}
.anchored {
position: absolute;
position-anchor: --a;
position-area: top;
position-try-fallbacks: flip-block;
width: 100px;
height: 100px;
container-type: anchored;
}
.anchored + .anchored {
/* Too tall to fit over the anchor to trigger fallback */
height: 200px;
}
@container anchored(fallback: none) {
div { --fallback: no; }
}
@container anchored(fallback: flip-block) {
div { --fallback: yes; }
}
</style>
<div id="anchor"></div>
<div class="anchored">
<div id="t1"></div>
</div>
<div class="anchored">
<div id="t2"></div>
</div>
<script>
test(() => {
assert_equals(document.querySelector(".anchored").offsetTop, 0);
assert_equals(getComputedStyle(t1).getPropertyValue("--fallback"), "no");
}, "@container anchored() without applied fallback");
test(() => {
assert_equals(document.querySelector(".anchored + .anchored").offsetTop, 200);
assert_equals(getComputedStyle(t2).getPropertyValue("--fallback"), "yes");
}, "@container anchored() with fallback applied");
</script>