<div class="container">
  <div class="block">Lorem ipsum dolor sit, amet consectetur adipisicing elit. Repellat, debitis quaerat maiores a sequi qui repellendus consectetur facilis tempore aliquid explicabo ducimus voluptatum delectus ipsam blanditiis. Placeat accusantium doloribus quas!</div>
  <div class="block">
    <!-- 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 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>
      <!-- Add Pagination -->
      <div class="swiper-pagination"></div>
      <!-- Add Arrows -->
      <div class="swiper-button-next"></div>
      <div class="swiper-button-prev"></div>
    </div>
  </div>
</div>

body {
  margin: 0;
  overflow-x: hidden; /* убираем горизонтальный скролл */
  height: 200vh;
}

.container {
  display: flex;
  margin: 0 auto;
  max-width: 360px;
  outline: 1px dashed orangered;
}

.block {
  width: 50%;
}


/* swiper */

.swiper-container {
  width: 50vw;
  /* либо */
  /* margin-right: calc(100% - 50vw); */
  
  
  height: 100%;
  outline: 2px dashed forestgreen;
}

.swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff6;

  /* Center slide text vertically */
  display: flex;
  justify-content: center;
  align-items: center;
}

var swiper = new Swiper(".swiper-container", {
  pagination: {
    el: ".swiper-pagination",
    type: "fraction"
  },
  navigation: {
    nextEl: ".swiper-button-next",
    prevEl: ".swiper-button-prev"
  }
});