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conformance · v133

v133 · css-advanced-attr-function — 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-values-5/#attr-notation chromestatus: #4680129030651904 generated 2026-06-01T08:12:59Z by conformance-author-v1-subagent
0
pass
0
fail
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blocked
6
total
id contract kind verdict detail
attr-with-type-px attr() accepts a unit suffix: attr(data-x px) is a valid declaration value. spec ↗ css-supports
attr-with-type-and-fallback attr() with type and fallback: attr(data-x px, 10px) is a valid declaration. spec ↗ css-supports
attr-with-color-type attr() supports <color> typed values. spec ↗ css-supports
attr-with-number-type attr() supports <number> typed values via type() syntax. spec ↗ css-supports
attr-on-non-content-property Typed attr() works on properties other than content; setting width to attr(data-x px) resolves to a length. spec ↗ script
attr-string-still-supported The legacy attr(<attr-name>) form still works on the content property. css-supports