$('.slider-main').slick({
            slidesToShow: 3,
            slidesToScroll: 1,
            /*autoplay: true,
            autoplaySpeed: 2000,*/
            prevArrow: $('.left-item'),
            nextArrow: $('.right-item'),

        });


        $('.slider-main').on('beforeChange', function(event, slick, currentSlide, nextSlide){
            console.log(currentSlide);
        });