| # selector-pseudo-element-no-unknown |
| |
| Disallow unknown pseudo-element selectors. |
| |
| ```css |
| a::before {} |
| /** ↑ |
| * This pseudo-element selector */ |
| ``` |
| |
| This rule considers pseudo-element selectors defined in the CSS Specifications, up to and including Editor's Drafts, to be known. |
| |
| This rule ignores vendor-prefixed pseudo-element selectors. |
| |
| ## Options |
| |
| ### `true` |
| |
| The following patterns are considered violations: |
| |
| ```css |
| a::pseudo {} |
| ``` |
| |
| ```css |
| a::PSEUDO {} |
| ``` |
| |
| ```css |
| a::element {} |
| ``` |
| |
| The following patterns are *not* considered violations: |
| |
| ```css |
| a:before {} |
| ``` |
| |
| ```css |
| a::before {} |
| ``` |
| |
| ```css |
| ::selection {} |
| ``` |
| |
| ```css |
| input::-moz-placeholder {} |
| ``` |
| |
| ## Optional secondary options |
| |
| ### `ignorePseudoElements: ["/regex/", "string"]` |
| |
| Given: |
| |
| ```js |
| ["/^my-/", "pseudo-element"] |
| ``` |
| |
| The following patterns are *not* considered violations: |
| |
| ```css |
| a::pseudo-element {} |
| ``` |
| |
| ```css |
| a::my-pseudo {} |
| ``` |
| |
| ```css |
| a::my-other-pseudo {} |
| ``` |
