JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="owl-item">first</div>
<div class="owl-item active">second</div>
<div class="owl-item active">third</div>
<div class="owl-item">fourth</div>

CSS

.owl-item {
  background-color:green;
  height:50px;
  width:50px;
  display:inline-block;
}

JavaScript

$('.active').prev().css('background-color', 'red');
$('.active').next().css('background-color', 'red');