https://philcul.net/wp-content/themes/graphy/js/skip-link-focus-fix.js?ver=20160525

1( function() {
2	"use strict";
3	
4	var is_webkit = navigator.userAgent.toLowerCase().indexOf( 'webkit' ) > -1,
5	    is_opera  = navigator.userAgent.toLowerCase().indexOf( 'opera' )  > -1,
6	    is_ie     = navigator.userAgent.toLowerCase().indexOf( 'msie' )   > -1;
7
8	if ( ( is_webkit || is_opera || is_ie ) && document.getElementById && window.addEventListener ) {
9		window.addEventListener( 'hashchange', function() {
10			var id = location.hash.substring( 1 ),
11				element;
12
13			if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
14				return;
15			}
16
17			element = document.getElementById( id );
18
19			if ( element ) {
20				if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
21					element.tabIndex = -1;
22				}
23
24				element.focus();
25			}
26		}, false );
27	}
28})();