value-list-comma-space-before

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

a { background-size: 0 ,0; }
/**                    ↑
 * The space before this comma */

The fix option can automatically fix most 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 { background-size: 0,0; }

a { background-size: 0
      , 0; }

The following patterns are not considered problems:

a { background-size: 0 ,0; }

a { background-size: 0 ,
      0; }

"never"

There must never be whitespace before the commas.

The following patterns are considered problems:

a { background-size: 0 ,0; }

a { background-size: 0 ,
      0; }

The following patterns are not considered problems:

a { background-size: 0,0; }

a { background-size: 0,
      0; }

"always-single-line"

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

The following patterns are considered problems:

a { background-size: 0,0; }

The following patterns are not considered problems:

a { background-size: 0 ,0; }

a { background-size: 0 ,
      0; }

a { background-size: 0
      , 0; }

"never-single-line"

There must never be whitespace before the commas in single-line value lists.

The following patterns are considered problems:

a { background-size: 0 ,0; }

The following patterns are not considered problems:

a { background-size: 0,0; }

a { background-size: 0,
      0; }

a { background-size: 0 ,
      0; }