<div class="swiper-container">
  <div class="swiper-wrapper">
    <div class="swiper-slide" style="background-image:url('https://picsum.photos/300/300?random1')"></div>
    <div class="swiper-slide" style="background-image:url('https://picsum.photos/300/300?random2')"></div>
    <div class="swiper-slide" style="background-image:url('https://picsum.photos/300/300?random3')"></div>
    <div class="swiper-slide" style="background-image:url('https://picsum.photos/300/300?random4')"></div>
    <div class="swiper-slide" style="background-image:url('https://picsum.photos/300/300?random5')"></div>
  </div>
</div>

* {
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 100vh;
  background-color: #eee;
}

.swiper-container {
  width: 300px;
  height: 300px;
}

.swiper-slide {
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
}

const mySwiper = new Swiper('.swiper-container', {
  effect: 'fade',
});