noUnknownPseudoElement

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Summary

Rule available since: v1.8.0
Diagnostic Category: lint/correctness/noUnknownPseudoElement
This rule is recommended, which means is enabled by default.
This rule doesn’t have a fix.
The default severity of this rule is error.
Sources:
- Same as stylelint/selector-pseudo-element-no-unknown

How to configure

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{
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  "linter": {
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    "rules": {
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      "correctness": {
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        "noUnknownPseudoElement": "error"
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      }
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    }
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  }
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}

Description

Disallow unknown pseudo-element selectors.

For details on known CSS pseudo-elements, see the MDN web docs.

This rule ignores vendor-prefixed pseudo-element selectors.

Examples

Invalid

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a::pseudo {}

code-block.css:1:4 lint/correctness/noUnknownPseudoElement ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected unknown pseudo-elements: pseudo
  
  > 1 │ a::pseudo {}
      │    ^^^^^^
    2 │ 
  
  ℹ See MDN web docs for more details.
  
  ℹ Use a known pseudo-elements instead, such as:
  
  - after
  - backdrop
  - before
  - etc.

1
a::PSEUDO {}

code-block.css:1:4 lint/correctness/noUnknownPseudoElement ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected unknown pseudo-elements: PSEUDO
  
  > 1 │ a::PSEUDO {}
      │    ^^^^^^
    2 │ 
  
  ℹ See MDN web docs for more details.
  
  ℹ Use a known pseudo-elements instead, such as:
  
  - after
  - backdrop
  - before
  - etc.

1
a::element {}

code-block.css:1:4 lint/correctness/noUnknownPseudoElement ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unexpected unknown pseudo-elements: element
  
  > 1 │ a::element {}
      │    ^^^^^^^
    2 │ 
  
  ℹ See MDN web docs for more details.
  
  ℹ Use a known pseudo-elements instead, such as:
  
  - after
  - backdrop
  - before
  - etc.

Valid

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a:before {}

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a::before {}

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::selection {}

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input::-moz-placeholder {}