WordPress 4.1

[autoinstalls/wordpress.git] / wp-content / themes / twentyfifteen / js / skip-link-focus-fix.js

diff --git a/wp-content/themes/twentyfifteen/js/skip-link-focus-fix.js b/wp-content/themes/twentyfifteen/js/skip-link-focus-fix.js
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+++ b/wp-content/themes/twentyfifteen/js/skip-link-focus-fix.js
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+/**
+ * Makes "skip to content" link work correctly in IE9, Chrome, and Opera
+ * for better accessibility.
+ *
+ * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
+ */
+
+( function() {
+       var ua = navigator.userAgent.toLowerCase();
+
+       if ( ( ua.indexOf( 'webkit' ) > -1 || ua.indexOf( 'opera' ) > -1 || ua.indexOf( 'msie' ) > -1 ) &&
+               document.getElementById && window.addEventListener ) {
+
+               window.addEventListener( 'hashchange', function() {
+                       var element = document.getElementById( location.hash.substring( 1 ) );
+
+                       if ( element ) {
+                               if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.nodeName ) ) {
+                                       element.tabIndex = -1;
+                               }
+
+                               element.focus();
+                       }
+               }, false );
+       }
+} )();