Slider Slider Responsive

<Swiper
  breakpoints={{
    // when window width is >= 640px
    640: {
      width: 640,
      slidesPerView: 1,
    },
    // when window width is >= 768px
    768: {
      width: 768,
      slidesPerView: 2,
    },
  }}
>
  {slides}
</Swiper>