<!-- Sliderを包むコンテナ要素 -->
<div class="swiper">
  <!-- スライド要素を包む要素 -->
  <div class="swiper-wrapper">
    <!-- 各スライド -->
    <div class="swiper-slide slide1">
      <p>スライド1</p>
    </div>
    <div class="swiper-slide slide2">
      <p>スライド2</p>
    </div>
    <div class="swiper-slide slide3">
      <p>スライド3</p>
    </div>
  </div>
  <div class="swiper-button-prev"></div>
  <div class="swiper-button-next"></div>
  <div class="swiper-pagination"></div>
</div>

.swiper {
  /*スライダーの幅と高さを調整*/
  width: 100%;
  height: 200px;
}

.swiper-slide {
  /*スライド要素の幅と高さを調整*/
  width: 100%;
  height: 100%;

  /*テキストの位置調整*/
  display: flex;
  justify-content: center;
  align-items: center;

  /*テキストの色と太さを指定*/
  color: #fff;
  font-weight: bold;
}

/*各スライドの背景色の設定*/
.slide1 {
  background-color: #88acbd;
}

.slide2 {
  background-color: #99cb1f;
}

.slide3 {
  background-color: #e43a47;
}

.swiper-button-prev {
  left: 50%;
  top: 10%;
  transform: translateX(-50%) rotate(90deg);
  -webkit-transform: translateX(-50%) rotate(90deg);
}

.swiper-button-next {
  left: 50%;
  top: 90%;
  bottom: 0;
  transform: translateX(-50%) rotate(90deg);
  -webkit-transform: translateX(-50%) rotate(90deg);
}

const swiper = new Swiper(".swiper", {
  navigation: {
    nextEl: ".swiper-button-next",
    prevEl: ".swiper-button-prev"
  },
  pagination: {
    el: ".swiper-pagination",
    type: "bullets",
    clickable: "clickable"
  },
  loop: true, //繰り返し指定
  spaceBetween: 10, //スライド感の余白
  direction: "vertical" //スライドの方向を縦に
});