JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.theme.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.js"></script>
<ul>
  <li><a href="javascript:void(0)" onclick="alert('item1')">item1</a></li>
  <li class="selectable"><a href="javascript:void(0)" onclick="alert('item2')">item2</a></li>
  <li class="selectable"><a href="javascript:void(0)" onclick="alert('item3')">item3</a></li>
  <li class="selectable"><a href="javascript:void(0)" onclick="alert('item4')">item4</a></li>
  <li class="selectable"><a href="javascript:void(0)" onclick="alert('item5')">item5</a></li>
  <li class="selectable"><a href="javascript:void(0)" onclick="alert('item6')">item6</a></li>
</ul>

CSS

.ui-selected{
  background-color:#ccc
}

JavaScript

$('ul').selectable({
	filter: '.selectable'
});