JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//beta.workbookcornwall.com/wp-includes/js/jquery/jquery.js"></script>
<h1>I'm am IE 9 or less</h1>

<small>Current browser class: <strong></strong></small>

CSS

STRONG {
	text-transform: uppercase;
}

JavaScript

// jQuery
(function($) {
	
	// just so you know there is body class
	var sBodyClass = $('BODY').attr('class');
	$('STRONG').html(sBodyClass);
	
	// my bloated check to see if body contains these classes
  if (!$('BODY.ie-9,BODY.ie-8,BODY.ie-7,BODY.ie-6')[0]) {
		
		// change the h1 one content if body class is not ie 9
    $('H1').html('Not ie 9 or below');

  }

})(jQuery);