noUnknownProperty

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Diagnostic Category: lint/correctness/noUnknownProperty

Since: v1.8.0

Sources:

Same as: stylelint/property-no-unknown

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

a {
  colr: blue;
}

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.

a {
  my-property: 1;
}

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

a {
  color: green;
}

a {
  fill: black;
}

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

How to configure

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