quick WordPress snippet for showing what classes have been added to the HTML and BODY elements -- useful for seeing what a tablet or phone gets without messing around with debuggers.

gistfile1.php

<?php


add_action('wp_print_footer_scripts', function() {
	?>

<script>
(function() {

	var p = document.createElement("p");
	p.appendChild(document.createTextNode("html classes: " + document.documentElement.className));
	document.body.appendChild(p);

	p = document.createElement("p");
	p.appendChild(document.createTextNode("body classes: " + document.body.className));
	document.body.appendChild(p);

})();
</script>

	<?php
});