<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<h1>CSS Simple </h1>
<div class="demo">
<p><a href="#" data-tooltip="I’m the tooltip text.">I’m a link with a tooltip.</a></p>
<p><button data-tooltip="I’m the tooltip text.">I’m a button with a tooltip</button></p>
</div>
