https://www.rarediseasesinternational.org/wp-content/themes/zeko-l…/js/skip-link-focus-fix.js?ver=1772531191

1/**
2 * File skip-link-focus-fix.js.
3 *
4 * Helps with accessibility for keyboard only users.
5 *
6 * Learn more: https://git.io/vWdr2
7 */
8( function() {
9
10	"use strict";
11
12	var isWebkit = navigator.userAgent.toLowerCase().indexOf( 'webkit' ) > -1,
13	    isOpera  = navigator.userAgent.toLowerCase().indexOf( 'opera' )  > -1,
14	    isIe     = navigator.userAgent.toLowerCase().indexOf( 'msie' )   > -1;
15
16	if ( ( isWebkit || isOpera || isIe ) && document.getElementById && window.addEventListener ) {
17		window.addEventListener( 'hashchange', function() {
18			var id = location.hash.substring( 1 ),
19				element;
20
21			if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
22				return;
23			}
24
25			element = document.getElementById( id );
26
27			if ( element ) {
28				if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
29					element.tabIndex = -1;
30				}
31
32				element.focus();
33			}
34		}, false );
35	}
36})();