<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.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> <form class="form-horizontal"> <fieldset> <!-- Form Name --> <legend>Form Name</legend> <!-- Appended Input--> <div class="control-group"> <label class="control-label" for="appendedtext">Appended Text</label> <div class="controls"> <div class="input-append"> <input id="appendedtext" name="appendedtext" class="input-xlarge" placeholder="placeholder" type="text"> <span class="add-on">append</span> </div> <p class="help-block">help</p> </div> </div> </fieldset> </form> </div> </div>