flyonui/src/js/plugins/collapse/variants.css

The easiest, free and open-source Tailwind CSS component library with semantic classes.

@custom-variant collapse-open {
  &.collapse.open {
    @slot;
  }

  &.collapse-toggle.open {
    @slot;
  }

  .collapse.open > & {
    @slot;
  }

  .collapse-toggle.open > & {
    @slot;
  }
}