<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <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 Content</div> <div class="panel-body">Panel Content</div> </div> </div> <div class="container"> <div class="row"> <div class="panel panel-default"> <div class="panel-heading">Badges</div> <div class="panel-body">Bootsrap Badges on Button</div> <button type="button" class="btn btn-primary">Messages <span class="badge">4</span></button> </div> </div> </div> </div>