selector-list-comma-space-before

Require a single space or disallow whitespace before the commas of selector lists.

   a ,b { color: pink; }
/**  ↑
 * The space before this comma */

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

Options

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

"always"

There must always be a single space before the commas.

The following patterns are considered problems:

a,b { color: pink; }

a, b { color: pink; }

The following patterns are not considered problems:

a ,b { color: pink; }

a , b { color: pink; }

"never"

There must never be whitespace before the commas.

The following patterns are considered problems:

a ,b { color: pink; }

a , b { color: pink; }

The following patterns are not considered problems:

a,b { color: pink; }

a, b { color: pink; }

"always-single-line"

There must always be a single space before the commas in single-line selector lists.

The following patterns are considered problems:

a,b { color: pink; }

The following patterns are not considered problems:

a,
b { color: pink; }

"never-single-line"

There must never be a single space before the commas in single-line selector lists.

The following patterns are considered problems:

a ,b { color: pink; }

The following patterns are not considered problems:

a ,
b { color: pink; }