at-rule-no-unknown
Disallow unknown at-rules.
@unknown (max-width: 960px) {}
/** ↑
* At-rules like this */This rule considers at-rules defined in the CSS Specifications, up to and including Editor’s Drafts, to be known.
Options
true
The following patterns are considered violations:
@unknown {}The following patterns are not considered violations:
@charset "UTF-8";@CHARSET "UTF-8";@media (max-width: 960px) {}@font-feature-values Font One {
@styleset {}
}Optional secondary options
ignoreAtRules: ["/regex/", /regex/, "string"]
Given:
["/^my-/", "custom"]The following patterns are not considered violations:
@my-at-rule "x.css";@my-other-at-rule {}@custom {}