JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<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>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.5/css/bootstrap-select.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.13.5/js/bootstrap-select.min.js"></script>
<select class="selectpicker">
  <option>Option 1</option>
  <option data-content="This -> &lt;u&gt;should not be underlined&lt;/u&gt;">XSS</option>
  <option title="This too -> &lt;u&gt;should not be underlined&lt;/u&gt;">Fixed XSS?</option>
  <option data-content="This -> &lt;img src='https://www.gstatic.com/images/branding/product/1x/keep_48dp.png'&gt;">XSS</option>
</select>

JavaScript

$('.selectpicker').selectpicker();