v150 · css · covered on mdn
named-feature() function for CSS @supports
A new @supports testing function for CSS features that cannot be detected through the standard property-value, selector, or at-rule mechanisms — resolving a class of situations where @supports was structurally unable to help. Ships in Chrome 150 on desktop, Android, and WebView.
this feature is documented on MDN
MDN: @supports — named-feature()
MDN's @supports reference documents named-feature() — “This function takes one predefined keyword and evaluates if a browser…” — among the @supports testing functions. gendn doesn't duplicate that here.
quick reference
| Chrome / Edge | 150 (enabled by default) |
|---|---|
| Firefox | Standards-positive; not yet shipped |
| Safari | No signal |
| Spec | CSS Conditional Rules Level 5 — named-feature() |
| ChromeStatus | 5153932394102784 — named-feature() function for CSS @supports |