selector-max-class

Limit the number of classes in a selector.

div .foo.bar[data-val] > a.baz {}
/*  ↑   ↑                 ↑
    ↑   ↑                 ↑
    1   2                 3  -- this selector contains three classes */

This rule resolves nested selectors before counting the number of classes in a selector. Each selector in a selector list is evaluated separately.

The :not() pseudo-class is also evaluated separately. The rule processes the argument as if it were an independent selector, and the result does not count toward the total for the entire selector.

Options

int: Maximum classes allowed.

For example, with 2:

The following patterns are considered problems:

.foo.bar.baz {}

.foo .bar {
  & > .baz {}
}

The following patterns are not considered problems:

div {}

.foo .bar {}

.foo.bar,
.lorem.ipsum {} /* each selector in a selector list is evaluated separately */

.foo .bar :not(.lorem.ipsum) {} /* `.lorem.ipsum` is inside `:not()`, so it is evaluated separately */