How to change swipe direction in swiper.js?

Question

I'm struggling with changing swipe direction when I rotate my swiper on 90deg. So in the beginning by default it has horizontal direction. When clicking on slide I'm rotating "swiper-container" making it full screen . So it still has swiping direction from left to right , but I need to change from top to bottom without changing in params direction to vertical .

const topSwiper = new Swiper(this.DOMTopSwiper.current, {
  spaceBetween: 0,
  observer: true,
  observeParents: true,
  observeSlideChildren: true,
  direction: "vertical",
  navigation: {
    nextEl: ".top-swiper-button-next",
    prevEl: ".top-swiper-button-prev",
  },
  pagination: {
    el: ".zoom-amount-slides",
    type: "fraction",
  },
})

Answer 1

Destroy previous Swiper and reinitialize Swiper giving the direction value. Here is doc

DEMO

let isVertical = true,
  direction = 'vertical';
let swiper = initSwiper(direction);

function initSwiper(direction) {
  return new Swiper('.swiper-container', {
    spaceBetween: 50,
    pagination: {
      el: '.swiper-pagination',
      clickable: true,
    },
    direction: direction
  });

}

function changeDirection() {
  isVertical = !isVertical;
  direction = isVertical ? 'vertical' : 'horizontal';
  let slideIndex = swiper.activeIndex;
  swiper.destroy(true, true);
  swiper = initSwiper(direction);
  swiper.slideTo(slideIndex,0);
}

html, body {
  position: relative;
  height: 100%;
}
body {
  background: #eee;
  font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
  font-size: 14px;
  color:#000;
  margin: 0;
  padding: 0;
}
.swiper-container {
  width: 400px;
  height: 400px;
}
.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
}

<!-- Link Swiper's CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/css/swiper.min.css">
<!-- Swiper JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/4.4.6/js/swiper.js"></script>
<button onclick='changeDirection()'>Change Direction</button>
<!-- Swiper -->
<div class="swiper-container">
  <div class="swiper-wrapper">
    <div class="swiper-slide">Slide 1</div>
    <div class="swiper-slide">Slide 2</div>
    <div class="swiper-slide">Slide 3</div>
  </div>
  <!-- Add Pagination -->
  <div class="swiper-pagination"></div>
</div>