function-parentheses-newline-inside

Require a newline or disallow whitespace on the inside of the parentheses of functions.

  a {
    transform: translate(
      1,             /* ↑ */
      1              /* ↑ */
    );               /* ↑ */
  }                  /* ↑ */
/** ↑                   ↑
 * The newline inside these two parentheses */

The fix option can automatically fix the problems reported by this rule, except some under "never-multi-line" where an inline comment stands in the whitespace: emptying it could move code into the comment, so the whitespace is left alone and the warning stands.

Options

string: "always"|"always-multi-line"|"never-multi-line"

"always"

There must always be a newline inside the parentheses.

The following patterns are considered problems:

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

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

The following patterns are not considered problems:

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

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

"always-multi-line"

There must always be a newline inside the parentheses of multi-line functions.

The following patterns are considered problems:

a { transform: translate(1,
  1) }

The following patterns are not considered problems:

a { transform: translate(1, 1) }

a { transform: translate( 1, 1 ) }

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

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

"never-multi-line"

The following patterns are considered problems:

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

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

The following patterns are not considered problems:

a { transform: translate(1, 1) }

a { transform: translate( 1, 1 ) }

a { transform: translate(1,
  1) }