stylelint-plugin-use-baseline

A Stylelint plugin by ryo-manba that warns when your CSS uses features that are not yet in Baseline. It reads data from the web-features package and adds one rule, plugin/use-baseline.

It checks properties, values, at-rules, media conditions, functions, units and pseudo-classes or pseudo-elements. Features inside a matching @supports block are allowed, and it flags @supports blocks you no longer need.

The available option sets the bar: widely (the default), newly, or a year such as 2023. You can ignore specific selectors, properties, at-rules, functions and units, and the README suggests running it as a warning.