JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="comment-pagination">
  <li class="comment-1 current">
    <a>1</a>
  </li>
  <li class="comment-2">
    <a>2</a>
  </li>
  <li class="comment-3">
    <a>3</a>
  </li>
</ul>

CSS

.current {
  color: red;
}

JavaScript

$(function() {
  var $steps = $(".comment-pagination li");
  var maxSteps = $steps.length - 1
  var step = 0;
  var pagingInterval = setInterval(function() {
    $steps
      .removeClass("current")
      .eq(step++).addClass("current");

    if(step > maxSteps) {
        step = 0;
    }    
  }, 2000);             
  
});