https://salarmycentral.org/wp-content/themes/onfleek/js/navigation.js

1/**
2 * navigation.js
3 *
4 * Handles toggling the navigation menu for small screens and enables tab
5 * support for dropdown menus.
6 */
7( function() {
8	
9	"use strict";
10	var container, button, menu, links, subMenus;
11
12	container = document.getElementById( 'site-navigation' );
13	if ( ! container ) {
14		return;
15	}
16
17	button = container.getElementsByTagName( 'button' )[0];
18	if ( 'undefined' === typeof button ) {
19		return;
20	}
21
22	menu = container.getElementsByTagName( 'ul' )[0];
23
24	// Hide menu toggle button if menu is empty and return early.
25	if ( 'undefined' === typeof menu ) {
26		button.style.display = 'none';
27		return;
28	}
29
30	menu.setAttribute( 'aria-expanded', 'false' );
31	if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
32		menu.className += ' nav-menu';
33	}
34
35	button.onclick = function() {
36		if ( -1 !== container.className.indexOf( 'toggled' ) ) {
37			container.className = container.className.replace( ' toggled', '' );
38			button.setAttribute( 'aria-expanded', 'false' );
39			menu.setAttribute( 'aria-expanded', 'false' );
40		} else {
41			container.className += ' toggled';
42			button.setAttribute( 'aria-expanded', 'true' );
43			menu.setAttribute( 'aria-expanded', 'true' );
44		}
45	};
46
47	// Get all the link elements within the menu.
48	links    = menu.getElementsByTagName( 'a' );
49	subMenus = menu.getElementsByTagName( 'ul' );
50
51	// Set menu items with submenus to aria-haspopup="true".
52	for ( var i = 0, len = subMenus.length; i < len; i++ ) {
53		subMenus[i].parentNode.setAttribute( 'aria-haspopup', 'true' );
54	}
55
56	// Each time a menu link is focused or blurred, toggle focus.
57	for ( i = 0, len = links.length; i < len; i++ ) {
58		links[i].addEventListener( 'focus', toggleFocus, true );
59		links[i].addEventListener( 'blur', toggleFocus, true );
60	}
61
62	/**
63	 * Sets or removes .focus class on an element.
64	 */
65	function toggleFocus() {
66		var self = this;
67
68		// Move up through the ancestors of the current link until we hit .nav-menu.
69		while ( -1 === self.className.indexOf( 'nav-menu' ) ) {
70
71			// On li elements toggle the class .focus.
72			if ( 'li' === self.tagName.toLowerCase() ) {
73				if ( -1 !== self.className.indexOf( 'focus' ) ) {
74					self.className = self.className.replace( ' focus', '' );
75				} else {
76					self.className += ' focus';
77				}
78			}
79
80			self = self.parentElement;
81		}
82	}
83} )();