JSFiddle - React, Tailwind, and code Playground

HTML

<div class="btn-group btn-small">
    <button class="btn btn-xs btn-success" href="#" type="button">Approve</button>
    <button class="btn btn-xs btn-danger" href="#" type="button">Deny</button>
</div>
<br>
<div class="btn-group">
    <a class="btn btn-sm btn-success" href="#">Approve</a>
    <a class="btn btn-sm btn-danger" href="#">Deny</a>
</div>
<br>
<div class="btn-group">
    <a class="btn btn-success" href="#">Approve</a>
    <a class="btn btn-danger" href="#">Deny</a>
</div>

CSS

@import url('http://getbootstrap.com/dist/css/bootstrap.css');
 .container {
    margin-top: 10px;
}