declaration-property-value-allowed-list

Specify a list of allowed property and value pairs within declarations.

a { text-transform: uppercase; }
/** ↑               ↑
 * These properties and these values */

The message secondary option can accept the arguments of this rule.

Options

Object<string, Array<string>>

{ "unprefixed-property-name": ["array", "of", "values", "/regex/"] }

You can specify a regex for a property name, such as { "/^animation/": [] }.

If a property name is found in the object, only the listed property values are allowed. This rule complains about all non-matching values. (If the property name is not included in the object, anything goes.)

The same goes for values. Keep in mind that a regular expression value is matched against the entire value of the declaration, not specific parts of it. For example, a value like "10px solid rgba( 255 , 0 , 0 , 0.5 )" will not match "/^solid/" (notice beginning of the line boundary) but will match "/\\s+solid\\s+/" or "/\\bsolid\\b/".

Be careful with regex matching not to accidentally consider quoted string values and url() arguments. For example, "/red/" will match value such as "1px dotted red" as well as "\"red\"" and "white url(/mysite.com/red.png)".

Given:

{
  "declaration-property-value-allowed-list": {
    "transform": ["/scale/"],
    "whitespace": ["nowrap"],
    "/color/": ["/^green/"]
  }
}

The following patterns are considered problems:

a { whitespace: pre; }

a { transform: translate(1, 1); }

a { -webkit-transform: translate(1, 1); }

a { color: pink; }

a { background-color: pink; }

The following patterns are not considered problems:

a { whitespace: nowrap; }

a { transform: scale(1, 1); }

a { -webkit-transform: scale(1, 1); }

a { color: green; }

a { background-color: green; }