How to add disabled state on custom Arrow/s class?

[geo-js]

Anyone knows how to add the disabled state to custom arrow class when the last slide is visible?

[NaotoshiFujita]

Use disabled attribute:
#358 (comment)

[geo-js]

Yeah, but the custom arrow class has no disabled attribute.

new Splide( '.splide-more-1', {
  type   : 'slide',
  classes: {
    arrows: 'slider-arrows-more-1',
    arrow : 'slider-arrow-more-1',
    prev  : 'left-arrow-more-1',
    next  : 'right-arrow-more-1',
  },
  perPage: 4,
  perMove: 1,
  pagination: false,
} ).mount();

[NaotoshiFujita]

Because it is an attribute. Style the arrow like this:

slider-arrow-more-1:disabled {
}