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Contents
# selector-pseudo-class-no-unknown
Disallow unknown pseudo-class selectors.
<!-- prettier-ignore -->
```css
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.
## Options
### `true`
The following patterns are considered violations:
<!-- prettier-ignore -->
```css
a:unknown {}
```
<!-- prettier-ignore -->
```css
a:UNKNOWN {}
```
<!-- prettier-ignore -->
```css
a:hoverr {}
```
The following patterns are _not_ considered violations:
<!-- prettier-ignore -->
```css
a:hover {}
```
<!-- prettier-ignore -->
```css
a:focus {}
```
<!-- prettier-ignore -->
```css
:not(p) {}
```
<!-- prettier-ignore -->
```css
input:-moz-placeholder {}
```
## Optional secondary options
### `ignorePseudoClasses: ["/regex/", "string"]`
Given:
```
["/^my-/", "pseudo-class"]
```
The following patterns are _not_ considered violations:
<!-- prettier-ignore -->
```css
a:pseudo-class {}
```
<!-- prettier-ignore -->
```css
a:my-pseudo {}
```
<!-- prettier-ignore -->
```css
a:my-other-pseudo {}
```
Version data entries
24 entries across 24 versions & 1 rubygems