<div id="next" onclick="swiper.slideNext()">NextSlide</div>
<div id="prev" onclick="swiper.slidePrev()">PrevSlide</div>
<div class="swiper-container">
  <div class="swiper-scrollbar"></div>
  <div class="swiper-button-prev"></div>
  <div class="swiper-button-next"></div>
  <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 class="swiper-slide">Slide 4</div>
    <div class="swiper-slide">Slide 5</div>
    <div class="swiper-slide">Slide 6</div>
    <div class="swiper-slide">Slide 7</div>
    <div class="swiper-slide">Slide 8</div>
    <div class="swiper-slide">Slide 9</div>
    <div class="swiper-slide">Slide 10</div>
  </div>
  <div class="swiper-pagination"></div>

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: 100%;
  height: 100%;
}
.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;
}

#prev {
  position: absolute;
  left: 10px;
  top: 10px;
  font-size: 30px;
  z-index: 100;
  cursor: pointer;
  padding: 5px 10px;
  background-color: tomato;
}

#next {
  position: absolute;
  right: 10px;
  top: 10px;
  font-size: 30px;
  z-index: 100;
  cursor: pointer;
  padding: 5px 10px;
  background-color: tomato;
}

var swiper = new Swiper(".swiper-container", {
  spaceBetween: 50,
  slidesPerView: 1,
  loop: true,
  navigation: {
    nextEl: ".swiper-button-next",
    prevEl: ".swiper-button-prev"
  },
  pagination: {
    el: ".swiper-pagination"
  },
});