https://www.cooperativaragnatela.it/wp-content/themes/shree/assets/js/navigation.js?ver=20151215

1/**
2 * File navigation.js.
3 * Handles toggling the navigation menu for small screens and enables TAB key
4 * navigation support for dropdown menus.
5 */
6( function() {
7	var container, button, menu, links, subMenus, i, len;
8	container = document.getElementById( 'site-navigation' );
9	if ( ! container ) {
10		return;
11	}
12	button = container.getElementsByTagName( 'button' )[0];
13	if ( 'undefined' === typeof button ) {
14		return;
15	}
16	menu = container.getElementsByTagName( 'ul' )[0];
17	// Hide menu toggle button if menu is empty and return early.
18	if ( 'undefined' === typeof menu ) {
19		button.style.display = 'none';
20		return;
21	}
22	menu.setAttribute( 'aria-expanded', 'false' );
23	if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
24		menu.className += ' nav-menu';
25	}
26	button.onclick = function() {
27		if ( -1 !== container.className.indexOf( 'toggled' ) ) {
28			container.className = container.className.replace( ' toggled', '' );
29			button.setAttribute( 'aria-expanded', 'false' );
30			menu.setAttribute( 'aria-expanded', 'false' );
31		} else {
32			container.className += ' toggled';
33			button.setAttribute( 'aria-expanded', 'true' );
34			menu.setAttribute( 'aria-expanded', 'true' );
35		}
36	};
37	// Get all the link elements within the menu.
38	links    = menu.getElementsByTagName( 'a' );
39	subMenus = menu.getElementsByTagName( 'ul' );
40	// Set menu items with submenus to aria-haspopup="true".
41	for ( i = 0, len = subMenus.length; i < len; i++ ) {
42		subMenus[i].parentNode.setAttribute( 'aria-haspopup', 'true' );
43	}
44	// Each time a menu link is focused or blurred, toggle focus.
45	for ( i = 0, len = links.length; i < len; i++ ) {
46		links[i].addEventListener( 'focus', toggleFocus, true );
47		links[i].addEventListener( 'blur', toggleFocus, true );
48	}
49/**
50
51	 * Sets or removes .focus class on an element.
52*/
53
54	function toggleFocus() {
55		var self = this;
56		// Move up through the ancestors of the current link until we hit .nav-menu.
57		while ( -1 === self.className.indexOf( 'nav-menu' ) ) {
58			// On li elements toggle the class .focus.
59			if ( 'li' === self.tagName.toLowerCase() ) {
60			if ( -1 !== self.className.indexOf( 'focus' ) ) {
61				self.className = self.className.replace( ' focus', '' );
62				} else {
63					self.className += ' focus';
64				}
65
66			}
67			self = self.parentElement;
68		}
69
70	}
71	/**
72	 * Toggles `focus` class to allow submenu access on tablets.
73	 */
74	( function( container ) {
75		var touchStartFn, i,
76			parentLink = container.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' );
77		if ( 'ontouchstart' in window ) {
78			touchStartFn = function( e ) {
79				var menuItem = this.parentNode, i;
80				if ( ! menuItem.classList.contains( 'focus' ) ) {
81					e.preventDefault();
82					for ( i = 0; i < menuItem.parentNode.children.length; ++i ) {
83						if ( menuItem === menuItem.parentNode.children[i] ) {
84							continue;
85						}
86						menuItem.parentNode.children[i].classList.remove( 'focus' );
87					}
88					menuItem.classList.add( 'focus' );
89				} else {
90					menuItem.classList.remove( 'focus' );
91				}
92			};
93			for ( i = 0; i < parentLink.length; ++i ) {
94				parentLink[i].addEventListener( 'touchstart', touchStartFn, false );
95
96			}
97		}
98	}( container ) );
99} )();