Swiper spaceBetween doesn't work properly

Question

I'am trying to use slidesPerView: 'auto' with spaceBetween: 20 property, but Swiper shows only one slide per view.

I want to show next slide right after the first one even if it will be cutted by the document width.

  $(document).ready(function () {
     //initialize swiper when document ready
     var mySwiper = new Swiper('.swiper-container', {
        // Optional parameters
        loop: false,
        slidesPerView: 3,
        spaceBetween: 40,
        navigation: {
           prevEl: '.slider .prev-btn',
           nextEl: '.slider .next-btn',
        },
        breakpoints: {
           1200: {
              slidesPerView: 'auto',
              spaceBetween: 40,
           },
           830: {
              slidesPerView: 'auto',
              spaceBetween: 10, // <- doesn't work
           }
        }
     });
  });

But it shows only one slide per view and ignores the space which is set in options.

How to set space between slides strictly?

Answer 1

I had the same problem with slidesPerView: 'auto' always showing only one slide. The solution for me was with CSS: (codepen)

.swiper-container{
  width: 100%;
}
.swiper-wrapper {
  width: 50%;
}
.swiper-slide {
  text-align: center;
  width: auto;
}
.slide-image {
  height: 400px;
  width: auto;
}
.my-gallery figure {
  margin: 0px;
}