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Diffstat (limited to 'testing/web-platform/tests/css/css-anchor-position/anchor-center-offset-change.html')
-rw-r--r-- | testing/web-platform/tests/css/css-anchor-position/anchor-center-offset-change.html | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/css/css-anchor-position/anchor-center-offset-change.html b/testing/web-platform/tests/css/css-anchor-position/anchor-center-offset-change.html new file mode 100644 index 0000000000..fa383154da --- /dev/null +++ b/testing/web-platform/tests/css/css-anchor-position/anchor-center-offset-change.html @@ -0,0 +1,41 @@ +<!DOCTYPE html> +<title>CSS Anchor Positioning Test: Dynamically change the anchor-center position</title> +<link rel="help" href="https://drafts.csswg.org/css-anchor-position-1/#anchor-center"> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<style> + #cb { + position: relative; + width: 200px; + height: 200px; + } + #anchor { + width: 100px; + height: 100px; + anchor-name: --anchor; + } + #anchored { + position: absolute; + width: 100px; + height: 100px; + position-anchor: --anchor; + align-self: anchor-center; + left: anchor(--unknown right, 0px); + } +</style> +<div id="cb"> + <div id="anchor"></div> + <div id="anchored"></div> +</div> +<script> + test(() => { + assert_equals(anchored.offsetLeft, 0); + assert_equals(anchored.offsetTop, 0); + }, "Anchored initially have the same width as the anchor"); + + test(() => { + anchor.style.height = "200px"; + assert_equals(anchored.offsetLeft, 0); + assert_equals(anchored.offsetTop, 50); + }, "Increase the height of the anchor to move the anchor-center offset"); +</script> |