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conformance · v146
v146 · named-feature-function-for-css-supports — 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.
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pass
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| id | contract | kind | verdict | detail |
|---|---|---|---|---|
css-supports-fn-exists |
CSS.supports() is the testing API used to evaluate named-feature() conditions. | typeof | … | |
named-feature-unknown-returns-false |
An unrecognised feature name passed to named-feature() makes the @supports condition evaluate to false. | script | … | |
named-feature-parser-recognises-syntax |
The named-feature() functional notation is a recognised @supports condition (whether or not any specific name is supported). spec ↗ | script | … | |
named-feature-anchor-position-follows-transforms |
Named feature 'anchor-position-follows-transforms' is one of the initial registered names exposed by the function. | script | … | |
named-feature-single-axis-scroll-container |
Named feature 'single-axis-scroll-container' is recognised by the parser (boolean either way). | script | … | |
supports-rule-with-named-feature-applies |
A @supports rule using named-feature() applies styles only when the condition is true, matching standard @supports semantics. | script | … |