JSFiddle - React, Tailwind, and code Playground
HTML
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="form-group has-warning has-feedback">
<label class="control-label">Nome</label>
<input type="text" class="form-control">
<span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
</div>
</div>
</div>
</div>