#selector-pseudo-class-parentheses-space-inside

Require a single space or disallow whitespace on the inside of the parentheses within pseudo-class selectors.

input:not( [type="submit"] ) {}
/**      ↑                 ↑
 * The space inside these two parentheses */

The --fix option on the command line can automatically fix all of the problems reported by this rule.

#Options

string: "always"|"never"

#"always"

There must always be a single space inside the parentheses.

The following patterns are considered violations:

input:not([type="submit"]) {}
input:not([type="submit"] ) {}

The following patterns are not considered violations:

input:not( [type="submit"] ) {}

#"never"

There must never be whitespace on the inside the parentheses.

The following patterns are considered violations:

input:not( [type="submit"] ) {}
input:not( [type="submit"]) {}

The following patterns are not considered violations:

input:not([type="submit"]) {}