<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div class="container">
<div class="row">
<h2>Create your snippet's HTML, CSS and Javascript in the editor tabs</h2>
</div>
<div class="panel panel-default">
<div class="panel-heading">panel heading without title</div>
<div class="panel-body">Panel content</div>
</div>
<div class="panel panel-default">
<div class="panel-heading">Badges</div>
<div class="panel-body">Bootstrap Badges on Button
<br>
<button type="button" class="btn btn-primary">Messages <span class="badge">7</span></button>
</div>
</div>
</div>