https://www.asplos-conference.org/wp-content/themes/imagery/assets/js/navigation.js?ver=1.4.0

1/**
2 * File navigation.js.
3 *
4 * Handles toggling the navigation menu for small screens and
5 * supports for dropdown menus.
6 */
7( function( $ ) {
8	//var body, masthead, menuToggle, siteNavigation, socialNavigation, siteHeaderMenu, resizeTimer;
9	var masthead, menuToggle, siteNavigation, siteHeaderMenu;
10
11	function initMainNavigation( container ) {
12
13		// Add dropdown toggle that displays child menu items.
14		var dropdownToggle = $( '<button />', {
15			'class': 'dropdown-toggle',
16			'aria-expanded': false
17		} ).append( $( '<span />', {
18			'class': 'screen-reader-text',
19			//text: screenReaderText.expand
20		} ) );
21
22		container.find( '.menu-item-has-children > a' ).after( dropdownToggle );
23
24		// Toggle buttons and submenu items with active children menu items.
25		container.find( '.current-menu-ancestor > button' ).addClass( 'toggled-on' );
26		container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
27
28		// Add menu items with submenus to aria-haspopup="true".
29		container.find( '.menu-item-has-children' ).attr( 'aria-haspopup', 'true' );
30
31		container.find( '.dropdown-toggle' ).click( function( e ) {
32			var _this            = $( this ),
33				screenReaderSpan = _this.find( '.screen-reader-text' );
34
35			e.preventDefault();
36			_this.toggleClass( 'toggled-on' );
37			_this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
38
39			// jscs:disable
40			_this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
41			// jscs:enable
42			//screenReaderSpan.text( screenReaderSpan.text() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
43		} );
44	}
45	initMainNavigation( $( '.main-navigation' ) );
46
47	masthead         = $( '#masthead' );
48	menuToggle       = masthead.find( '#menu-toggle' );
49	siteHeaderMenu   = masthead.find( '#site-header-menu' );
50	siteNavigation   = masthead.find( '#site-navigation' );
51
52	// Enable menuToggle.
53	( function() {
54
55		// Return early if menuToggle is missing.
56		if ( ! menuToggle.length ) {
57			return;
58		}
59
60		// Add an initial values for the attribute.
61		menuToggle.add( siteNavigation ).attr( 'aria-expanded', 'false' );
62
63		menuToggle.on( 'click.imagery', function() {
64			$( this ).add( siteHeaderMenu ).toggleClass( 'toggled-on' );
65
66			// jscs:disable
67			$( this ).add( siteNavigation ).attr( 'aria-expanded', $( this ).add( siteNavigation ).attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
68			// jscs:enable
69		} );
70	} )();
71
72	// Fix sub-menus for touch devices and better focus for hidden submenu items for accessibility.
73	( function() {
74		if ( ! siteNavigation.length || ! siteNavigation.children().length ) {
75			return;
76		}
77
78		// Toggle `focus` class to allow submenu access on tablets.
79		function toggleFocusClassTouchScreen() {
80			if ( window.innerWidth >= 910 ) {
81				$( document.body ).on( 'touchstart.imagery', function( e ) {
82					if ( ! $( e.target ).closest( '.main-navigation li' ).length ) {
83						$( '.main-navigation li' ).removeClass( 'focus' );
84					}
85				} );
86				siteNavigation.find( '.menu-item-has-children > a' ).on( 'touchstart.imagery', function( e ) {
87					var el = $( this ).parent( 'li' );
88
89					if ( ! el.hasClass( 'focus' ) ) {
90						e.preventDefault();
91						el.toggleClass( 'focus' );
92						el.siblings( '.focus' ).removeClass( 'focus' );
93					}
94				} );
95			} else {
96				siteNavigation.find( '.menu-item-has-children > a' ).unbind( 'touchstart.imagery' );
97			}
98		}
99
100		if ( 'ontouchstart' in window ) {
101			$( window ).on( 'resize.imagery', toggleFocusClassTouchScreen );
102			toggleFocusClassTouchScreen();
103		}
104
105		siteNavigation.find( 'a' ).on( 'focus.imagery blur.imagery', function() {
106			$( this ).parents( '.menu-item' ).toggleClass( 'focus' );
107		} );
108	} )();
109
110	// Add the default ARIA attributes for the menu toggle and the navigations.
111	function onResizeARIA() {
112		if ( window.innerWidth < 910 ) {
113			if ( menuToggle.hasClass( 'toggled-on' ) ) {
114				menuToggle.attr( 'aria-expanded', 'true' );
115			} else {
116				menuToggle.attr( 'aria-expanded', 'false' );
117			}
118
119			if ( siteHeaderMenu.hasClass( 'toggled-on' ) ) {
120				siteNavigation.attr( 'aria-expanded', 'true' );
121			} else {
122				siteNavigation.attr( 'aria-expanded', 'false' );
123			}
124
125			menuToggle.attr( 'aria-controls', 'site-navigation' );
126		} else {
127			menuToggle.removeAttr( 'aria-expanded' );
128			siteNavigation.removeAttr( 'aria-expanded' );
129			menuToggle.removeAttr( 'aria-controls' );
130		}
131	}
132})(jQuery); // end jQuery