JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Swiper demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1">

<link rel="stylesheet" href="https://unpkg.com/swiper/css/swiper.min.css">

<script src="https://unpkg.com/swiper/js/swiper.min.js"></script>

  <!-- Demo styles -->
  <style>
    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%;
      margin-left: auto;
      margin-right: auto;
    }
    .swiper-slide {
      text-align: center;
      font-size: 18px;
      background: #fff;

      /* Center slide text vertically */
      display: flex;
      flex-flow: column;
      justify-content: center;
      align-items: center;
    }
    
.swiper-slide-duplicate:before,
.swiper-slide-duplicate-prev:before {
    content: " Дубликат, реальный индекс: (" attr(data-swiper-slide-index) ")";
    color: red;
    display: block;
    padding: 15px;
}

.swiper-slide-duplicate:after,
.swiper-slide-duplicate-prev:after {
    content: "Напоминаю, что в JS индекс начинается с нуля, поэтому он на единицу меньше :))";
    color: green;
    display: block;
    padding: 15px;
    
}
  </style>
</head>
<body>
  <!-- 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...