media-feature-name-no-unknown

Disallow unknown media feature names.

@media (min-width: 700px) {}
/**     ↑
 * This media feature name */

This rule considers media feature names defined in the CSS Specifications, up to and including Editor's Drafts, to be known.

This rule ignores vendor-prefixed media feature names.

The message secondary option can accept the arguments of this rule.

Options

{
  "media-feature-name-no-unknown": true
}

The following patterns are considered problems:

@media screen and (unknown) {}

@media screen and (unknown: 10px) {}

@media screen and (unknown > 10px) {}

The following patterns are not considered problems:

@media all and (monochrome) {}

@media (min-width: 700px) {}

@media (MIN-WIDTH: 700px) {}

@media (min-width: 700px) and (orientation: landscape) {}

@media (-webkit-min-device-pixel-ratio: 2) {}

{ "ignoreMediaFeatureNames": ["array", "of", "media-features", "/regex/"] }

Given:

{
  "media-feature-name-no-unknown": [
    true,
    { "ignoreMediaFeatureNames": ["/^my-/", "custom"] }
  ]
}

The following patterns are not considered problems:

@media screen and (my-media-feature-name) {}

@media screen and (custom: 10px) {}

@media screen and (100px < custom < 700px) {}

@media (min-width: 700px) and (custom: 10px) {}