Twenty Fifteen: prevent a flash of visible sub menus before scripts load.

Props mattwiebe, aferica, fixes #30056.



git-svn-id: https://develop.svn.wordpress.org/trunk@30211 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/themes/twentyfifteen/header.php

@@ -18,6 +18,7 @@
 	<!--[if lt IE 9]>
 	<script src="<?php echo get_template_directory_uri(); ?>/js/html5.js"></script>
 	<![endif]-->
+	<script>(function(){document.documentElement.className='js'})();</script>
 	<?php wp_head(); ?>
 </head>
 

src/wp-content/themes/twentyfifteen/js/functions.js

@@ -8,8 +8,6 @@
 ( function( $ ) {
 	var $body, $window, sidebar, toolbarOffset;
 
-	$( 'html' ).removeClass( 'no-js' );
-
 	// Add dropdown toggle that display child menu items.
 	$( '.main-navigation .page_item_has_children > a, .main-navigation .menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' );