Add class to visible items

[ghost]

Hi there!
I am struggling to add a class to the current slides if you have multiple items enabled.
So far I found something like this:

function currentSlide() {
    $('.item').removeClass('current');
    $('.siema').find('.item').eq(this.currentSlide).addClass('current');
}
onInit: currentSlide,
onChange: currentSlide,	

But this only adds the current class to one item. Since I am using a carousel with 3 items visible at once, I need to add the class to all of the items (which are visible). Is this possible? Thanks in advance!

[hugoburguete]

Can you not find the item per index and loop through this.perPage?