selector-pseudo-class-no-unknown

Disallow unknown pseudo-class selectors.

  a:hover {}
/** ↑
 * This pseudo-class selector */

This rule considers pseudo-class selectors defined in the CSS Specifications, up to and including Editor's Drafts, to be known.

This rule ignores vendor-prefixed pseudo-class selectors.

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

Options

The following patterns are considered problems:

a:unknown {}

a:UNKNOWN {}

a:hoverr {}

The following patterns are not considered problems:

a:hover {}

a:focus {}

:not(p) {}

input:-moz-placeholder {}

Given:

["/^--my-/", "--pseudo-class"]

The following patterns are not considered problems:

a:--my-pseudo {}

a:--my-other-pseudo {}

a:--pseudo-class {}