#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 */

#Options

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

#"always"

There must always be a newline inside the parentheses.

The following patterns are considered warnings:

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

The following patterns are not considered warnings:

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 warnings:

a { transform: translate(1,
  1) }

The following patterns are not considered warnings:

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 warnings:

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

The following patterns are not considered warnings:

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