JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="events find">
                    <ul>
                        <li><a href="#0">Link 1</a></li>
                        <li><a href="#0">Link 1</a></li>
                        <li><a href="#0">Link 1</a></li>
                    </ul>
                </div>

CSS

.selected {
  color: green
}

JavaScript

$('.find a:first').addClass('selected');