JSFiddle - React, Tailwind, and code Playground

by Pavlo

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.0/css/swiper.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/Swiper/3.4.0/js/swiper.min.js"></script>
<script src="https://code.jquery.com/jquery.min.js"></script>
 <!-- Swiper -->
    <div class="swiper-container">
        <div class="swiper-wrapper">
            <div class="swiper-slide">Slide 1</div>
            <div class="swiper-slide">
              <span class="count" data-total="450" data-seconds="5"></span>
            </div>
            <div class="swiper-slide">Slide 3</div>
        </div>
    </div>

CSS

body {
        background: #eee;
        font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
        font-size: 14px;
        color:#000;
        margin: 0;
        padding: 0;
    }
    .swiper-container {
        width: 500px;
        height: 300px;
        margin: 20px auto;
    }
    .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;
    }

JavaScript

// initiate slider
var swiper = new Swiper('.swiper-container');

  // event listener
  function addClassNameListener(elemId, callback) {
        var elem = $(".swiper-home .swiper-slide:nth-child(2)");
        var activeClassName = 'swiper-slide-active';
        window.setInterval( function() {   
         var className = elem.className;
          if (className == activeClassName) {
            callback();   
          }
        },10);
      }

    addClassNameListener("foo", function(){ 
      $('.swiper-slide-active .count').each(function () {
        //$('body').scrollTop($(this).parent.offset().top);
        $(this).prop('Counter', 0).animate({
          Counter: $(this).data().total
        }, {
          duration: $(this).data().seconds * 1000,
          easing: 'swing',
          step: function (now) {
            $(this).text(Math.ceil(now));
          }
        });
      });
      alert("changed"); 

    });