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43df9d6 Nov 30, 2016
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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 warnings:

@unknown {}

The following patterns are not considered warnings:

@charset "UTF-8";
@CHARSET "UTF-8";
@media (max-width: 960px) {}
@font-feature-values Font One {
  @styleset {}
}

Optional secondary options

ignoreAtRules: ["/regex/", "string"]

Given:

["/^my-/", "custom"]

The following patterns are not considered warnings:

@my-at-rule "x.css";
@my-other-at-rule {}
@custom {}