noUnknownProperty

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Summary

Rule available since: v1.8.0
Diagnostic Category: lint/correctness/noUnknownProperty
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/property-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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        "noUnknownProperty": "error"
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      }
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    }
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  }
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}

Description

Disallow unknown properties.

This rule considers properties defined in the CSS Specifications and browser specific properties to be known. https://github.com/known-css/known-css-properties#source

This rule ignores:

custom variables e.g. --custom-property
vendor-prefixed properties (e.g., -moz-align-self, -webkit-align-self)

Examples

Invalid

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a {
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  colr: blue;
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}

code-block.css:2:3 lint/correctness/noUnknownProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unknown property is not allowed.
  
    1 │ a {
  > 2 │   colr: blue;
      │   ^^^^
    3 │ }
    4 │ 
  
  ℹ See CSS Specifications and browser specific properties for more details.
  
  ℹ To resolve this issue, replace the unknown property with a valid CSS property.

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a {
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  my-property: 1;
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}

code-block.css:2:3 lint/correctness/noUnknownProperty ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Unknown property is not allowed.
  
    1 │ a {
  > 2 │   my-property: 1;
      │   ^^^^^^^^^^^
    3 │ }
    4 │ 
  
  ℹ See CSS Specifications and browser specific properties for more details.
  
  ℹ To resolve this issue, replace the unknown property with a valid CSS property.

Valid

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a {
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  color: green;
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}

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a {
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  fill: black;
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}

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a {
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  -moz-align-self: center;
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}