notes/node_modules/stylelint/lib/rules/function-name-case/README.md

function-name-case

Specify lowercase or uppercase for function names.

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

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

Options

string: "lower"|"upper"

"lower"

The following patterns are considered warnings:

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 warnings:

a {
  width: calc(5% - 10em);
}

a {
  background: -webkit-radial-gradient(red, green, blue);
}

"upper"

The following patterns are considered warnings:

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 warnings:

a {
  width: CALC(5% - 10em);
}

a {
  background: -WEBKIT-RADIAL-GRADIENT(red, green, blue);
}

Optional secondary options

ignoreFunctions: ["/regex/", "non-regex"]

Ignore case of function names.

For example, with "lower".

Given:

["SOME-FUNCTION", "/^get.*$/"]

The following patterns are considered warnings:

a {
  color: sOmE-FuNcTiOn();
}

a {
  color: OTHER-SOME-FUNCTION();
}

a {
  color: GetColor();
}

a {
  color: GET_COLOR();
}

The following patterns are not considered warnings:

a {
  display: some-function();
}

a {
  display: SOME-FUNCTION();
}

a {
  display: getColor();
}

a {
  display: get_color();
}

For example, with "upper".

Given:

["some-function", "/^get.*$/"]

The following patterns are considered warnings:

a {
  color: sOmE-FuNcTiOn();
}

a {
  color: other-some-function();
}

a {
  color: GetColor();
}

a {
  color: GET_COLOR();
}

The following patterns are not considered warnings:

a {
  display: some-function();
}

a {
  display: SOME-FUNCTION();
}

a {
  display: getColor();
}

a {
  display: get_color();
}