JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<div id="center" class="container">
    <div class="row text-center">
        <div class="btn-toolbar">
            <div class="btn-group" style="margin:0;"> <a class="btn btn-default" href="#">test</a>

            </div>
        </div>
        <br />
        <p>Am I centered ?</p> <a class="btn btn-default" href="#">Back</a>

    </div>
</div>

CSS

.btn-toolbar {
    width: 50px;
    margin: 0px auto;
}