<!-- 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>slide1</p>
    </div>
    <div class="swiper-slide slide2">
      <p>slide2</p>
    </div>
    <div class="swiper-slide slide3">
      <p>slide3</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: 90%;
  height: 200px;
  margin: 0.5rem auto;
}

.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;
}

/* 前へ次への矢印カスタマイズ */
.swiper-button-prev:after,
.swiper-button-next:after {
  content: "";
  width: 1rem;
  height: 1rem;
  border: 0;
  border-top: solid 0.5rem #f5b2b2;
  border-right: solid 0.5rem #f5b2b2;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
}
/* 前への矢印カスタマイズ */
.swiper-button-prev:before {
  border-bottom: 20px solid transparent;
  border-right: 30px solid #ff4500;
  border-top: 20px solid transparent;
}
.swiper-button-prev:after {
  transform: rotate(-135deg);
}
/* 次への矢印カスタマイズ */
.swiper-button-next:before {
  border-bottom: 20px solid transparent;
  border-left: 30px solid #ff4500;
  border-top: 20px solid transparent;
}
.swiper-button-next:after {
  transform: rotate(45deg);
}

const swiper = new Swiper(".swiper", {
  // ページネーション
  pagination: {
    el: ".swiper-pagination",
    clickable: true
  },
  // 前後の矢印
  navigation: {
    nextEl: ".swiper-button-next",
    prevEl: ".swiper-button-prev"
  }
});