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conformance · v150

v150 · css-background-clip-border-area — conformance probe

8 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-backgrounds-4/#valdef-background-clip-border-area chromestatus: #6234471210811392 generated 2026-06-03T22:20:27Z by codex-static-repair
0
pass
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fail
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blocked
8
total
id contract kind verdict detail
background-clip-property-baseline background-clip exists and accepts the legacy border-box keyword (regression baseline). css-supports
background-clip-border-area-supported The new border-area keyword parses via CSS.supports. spec ↗ css-supports
background-clip-text-still-supported The text keyword still parses; border-area is additive, not a replacement. css-supports
border-area-computed-roundtrip Setting background-clip: border-area via CSSOM round-trips through getComputedStyle. script
border-area-composes-with-padding-box background-clip accepts a border-area layer composed with a padding-box fill layer. spec ↗ css-supports
border-area-layered-cssom-roundtrip Layered background-image, background-origin, and background-clip declarations keep border-area and padding-box data observable through CSSOM. spec ↗ script
background-clip-invalid-keyword-rejected Bogus keywords are still rejected (regression check that the parser remains strict). script
border-area-respects-border-width An element with a thick border, background-color, and background-clip: border-area exposes a non-zero offsetWidth — the demo is observable in the DOM. script