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function-name-case

Specify lowercase or uppercase for function names.

a { width: calc(5% - 10em); }
/**        ↑
 * This function */

Camel case function names, e.g. translateX, are accounted for when the lower option is used.

The fix option can automatically fix all of the problems reported by this rule.

Options​

"lower"​

{
  "function-name-case": "lower"
}

The following patterns are considered problems:

a {
  width: Calc(5% - 10em);
}
a {
  width: cAlC(5% - 10em);
}
a {
  width: CALC(5% - 10em);
}
a {
  background: -WEBKIT-RADIAL-GRADIENT(red, green, blue);
}

The following patterns are not considered problems:

a {
  width: calc(5% - 10em);
}
a {
  background: -webkit-radial-gradient(red, green, blue);
}

"upper"​

{
  "function-name-case": "upper"
}

The following patterns are considered problems:

a {
  width: Calc(5% - 10em);
}
a {
  width: cAlC(5% - 10em);
}
a {
  width: calc(5% - 10em);
}
a {
  background: -webkit-radial-gradient(red, green, blue);
}

The following patterns are not considered problems:

a {
  width: CALC(5% - 10em);
}
a {
  background: -WEBKIT-RADIAL-GRADIENT(red, green, blue);
}

Optional secondary options​

ignoreFunctions​

{ "ignoreFunctions": ["array", "of", "functions", "/regex/"] }

Ignore case of function names.

Given:

{
  "function-name-case": [
    "lower",
    { "ignoreFunctions": ["--some-function", "/^--get.*$/"] }
  ]
}

The following patterns are considered problems:

a {
  color: --sOmE-FuNcTiOn();
}
a {
  color: --GetColor();
}
a {
  color: --GET_COLOR();
}

The following patterns are not considered problems:

a {
  display: --some-function();
}
a {
  display: --getColor();
}
a {
  display: --get_color();
}