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conformance · v144

v144 · css-anchor-positioning-with-transforms — conformance probe

5 assertions drawn from the spec. Each is a single contract the spec text makes. Pass/fail reflects what this browser executed; blocked means the contract was not run because it needs user mediation, hardware, or another unavailable precondition. Open the page in Chrome stable / canary / Firefox / Safari to compare.

browser: spec: https://drafts.csswg.org/css-anchor-position-1/#anchor-position-size chromestatus: #5201048700583936 generated 2026-06-01T08:03:56Z by conformance-author-v1-subagent
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id contract kind verdict detail
anchor-name-supported The anchor-name property is parsed by CSS, which is the entry point to anchor positioning. spec ↗ css-supports
position-anchor-supported The position-anchor property is supported on positioned elements. spec ↗ css-supports
anchor-function-in-top-supported The anchor() function is accepted as a value for inset properties like top. spec ↗ css-supports
anchor-size-function-in-width-supported The anchor-size() function is accepted as a value for sizing properties like width. spec ↗ css-supports
anchor-resolves-against-transformed-bounding-box When the anchor element is transformed, anchor() resolves against its axis-aligned bounding box rather than its untransformed border box. Positioned element sits next to the transformed anchor. spec ↗ script