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conformance · v139

v139 · corner-shaping-corner-shape-superellipse-squircle — conformance probe

6 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-borders-4/#corner-shaping chromestatus: #5357329815699456 generated 2026-06-01T08:13:31Z by conformance-author-v1-subagent
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id contract kind verdict detail
corner-shape-property-supported The corner-shape property is supported as a shorthand controlling all four corners. spec ↗ css-supports
corner-shape-superellipse corner-shape accepts the superellipse() functional notation with a curvature exponent. spec ↗ css-supports
corner-shape-bevel-keyword corner-shape accepts the bevel keyword (equivalent to a straight cut between adjacent edges). spec ↗ css-supports
corner-top-left-shape-longhand Per-corner longhand corner-top-left-shape lets authors set a single corner's shape independently. spec ↗ css-supports
border-radius-still-supported border-radius continues to work as the size primitive that corner-shape modifies. css-supports
corner-shape-animatable-via-cssom Setting element.style.cornerShape via CSSOM round-trips and is observable through computed style. spec ↗ script