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 id="page-content-wrapper">
    <div class='hidden-lg'>
        <div class="content-header">
             <h1>
                <a id="menu-toggle" href="#" class="btn btn-default"><i class="glyphicon glyphicon-arrow-right"></i></a>
                </h1>

        </div>
    </div>

JavaScript

$('#menu-toggle').on('click', function () {
    var iSelector = $(this).find('i:first');
    if (iSelector.hasClass('glyphicon-arrow-right')) {
        iSelector.removeClass('glyphicon-arrow-right')
        iSelector.addClass('glyphicon-arrow-left')
    } else if (iSelector.hasClass('glyphicon-arrow-left')) {
        iSelector.removeClass('glyphicon-arrow-left')
        iSelector.addClass('glyphicon-arrow-right')
    }
});