JSFiddle - React, Tailwind, and code Playground

HTML

<div class="input-group">
  <div class="input-group-btn">
    <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
       <span>server file</span>
	   <span class="caret"></span>
    </button>
    <ul class="dropdown-menu" role="menu">
     <textarea style="resize:none" class="form-control"></textarea>
    </ul>
  </div>
 
</div>

CSS

@import url('http://getbootstrap.com/dist/css/bootstrap.css');