JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css">
        <div class="navbar navbar-inverse navbar-fixed-bottom" role="navigation">
            <div class="container">
                <div class="navbar-text pull-right">
                    <div class="my-container">
                        <div class="my-content">
                            <a href="#" ><i class="btn btn-xs fa fa-facebook-square fa-2x"></i></a>
                        </div>
                    </div>
                </div>
            </div>
        </div>

CSS

/*override bootstrap value and set all margin / padding /border to 0px*/
.navbar-text.pull-right {
    height: 100%;
    /* margin:0px 15px; */
    /* border: 0px; */
    /* padding: 0px; */
}

.navbar.navbar-inverse.navbar-fixed-bottom {
    /* border: 0px; */
}

.btn.btn-xs.fa.fa-facebook-square.fa-2x {
    /* border:0px; */
    /* padding:0px; */
}


/*the value that I fucked up with*/
.navbar-fixed-bottom{
    height: 50px;
}


.container {
    height: 100%;
}


.my-container {
    display: table;
    height:100%;

}

.my-content {
    display: table-cell;
    vertical-align: middle;
}