https://bewidog.cyou/wp-content/themes/digital-newspaper/assets/js/navigation.js?ver=1.0.0

1/**
2 * File navigation.js.
3 *
4 * Handles toggling the navigation menu for small screens and enables TAB key
5 * navigation support for dropdown menus.
6 */
7( function($) {
8	const siteNavigation = document.getElementById( 'site-navigation' ), KEYCODE_TAB = 9;
9
10	// Return early if the navigation doesn't exist.
11	if ( ! siteNavigation ) {
12		return;
13	}
14
15	const button = siteNavigation.getElementsByTagName( 'button' )[ 0 ];
16
17	// Return early if the button doesn't exist.
18	if ( 'undefined' === typeof button ) {
19		return;
20	}
21
22	const menu = siteNavigation.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	if ( ! menu.classList.contains( 'nav-menu' ) ) {
31		menu.classList.add( 'nav-menu' );
32	}
33
34	// Toggle the .toggled class and the aria-expanded value each time the button is clicked.
35	button.addEventListener( 'click', function() {
36		siteNavigation.classList.toggle( 'toggled' );
37
38		if ( button.getAttribute( 'aria-expanded' ) === 'true' ) {
39			button.setAttribute( 'aria-expanded', 'false' );
40		} else {
41			button.setAttribute( 'aria-expanded', 'true' );
42		}
43
44		var element = document.querySelector( '#site-navigation.toggled' );
45		if( element ) {
46			document.addEventListener('keydown', function(e) {
47				if( document.querySelector( '#site-navigation.toggled' ) ) {
48					var focusable = document.querySelector( '#site-navigation.toggled' ).querySelectorAll( 'input, a, button' );
49					focusable = Array.prototype.slice.call( focusable );
50					focusable = focusable.filter( function( focusableelement ) {
51						return null !== focusableelement.offsetParent;
52					} );
53					var firstFocusable = document.querySelector('.menu-toggle');
54					var lastFocusable = focusable[focusable.length - 1];
55					digital_newspaper_focus_trap( firstFocusable, lastFocusable, e );
56				}
57			})
58		}
59	} );
60
61	// Remove the .toggled class and set aria-expanded to false when the user clicks outside the navigation.
62	document.addEventListener( 'click', function( event ) {
63		const isClickInside = siteNavigation.contains( event.target );
64
65		if ( ! isClickInside ) {
66			siteNavigation.classList.remove( 'toggled' );
67			button.setAttribute( 'aria-expanded', 'false' );
68		}
69	} );
70
71	// Get all the link elements within the menu.
72	const links = menu.getElementsByTagName( 'a' );
73
74	// Get all the link elements with children within the menu.
75	const linksWithChildren = menu.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' );
76
77	// Toggle focus each time a menu link is focused or blurred.
78	for ( const link of links ) {
79		link.addEventListener( 'focus', toggleFocus, true );
80		link.addEventListener( 'blur', toggleFocus, true );
81	}
82
83	// Toggle focus each time a menu link with children receive a touch event.
84	for ( const link of linksWithChildren ) {
85		link.addEventListener( 'touchstart', toggleFocus, false );
86	}
87
88	/**
89	 * Sets or removes .focus class on an element.
90	 */
91	function toggleFocus() {
92		if ( event.type === 'focus' || event.type === 'blur' ) {
93			let self = this;
94			// Move up through the ancestors of the current link until we hit .nav-menu.
95			while ( ! self.classList.contains( 'nav-menu' ) ) {
96				// On li elements toggle the class .focus.
97				if ( 'li' === self.tagName.toLowerCase() ) {
98					self.classList.toggle( 'focus' );
99				}
100				self = self.parentNode;
101			}
102		}
103
104		if ( event.type === 'touchstart' ) {
105			const menuItem = this.parentNode;
106			for ( const link of menuItem.parentNode.children ) {
107				if ( menuItem !== link ) {
108					link.classList.remove( 'focus' );
109				}
110			}
111			menuItem.classList.toggle( 'focus' );
112		}
113	}
114
115	/**
116	 * Responsive header menu modal
117	 * 
118	 * @returns void
119	 * @since 1.0.0
120	 */
121	function digital_newspaper_focus_trap( firstFocusable, lastFocusable, e ) {
122        if (e.key === 'Tab' || e.keyCode === KEYCODE_TAB) {
123            if ( e.shiftKey ) /* shift + tab */ {
124				if (document.activeElement === firstFocusable) {
125                    lastFocusable.focus();
126                    e.preventDefault();
127                }
128            } else /* tab */ {
129                if ( document.activeElement === lastFocusable ) {
130                    firstFocusable.focus();
131                    e.preventDefault();
132                }
133            }
134        }
135    }
136
137	/**
138	 * Responsive header sub menu toggler
139	 * 
140	 * @returns void
141	 * @since 1.0.0
142	 */
143	function dropdownMenuMobileHandle() {
144		if ( ! $( "#site-navigation .menu-item.menu-item-has-children" ).length > 0 && ! $( "#site-navigation .page_item.page_item_has_children" ).length > 0 ) {
145			return;
146		}
147		$( "#site-navigation .menu-item.menu-item-has-children .sub-menu, #site-navigation .page_item.page_item_has_children .children" ).before( '<a href="#" class="toggle-sub-menu"><i class="fas fa-plus"></i></a>' );
148		$(document).on( "click", "#site-navigation .toggle-sub-menu", function (e) {
149			e.preventDefault();
150			var _this = $(this)
151			_this.parent().siblings().children( ".sub-menu, .children" ).removeClass( "isShow" );
152			_this.siblings( ".sub-menu, .children" ).toggleClass( "isShow" );
153			_this.parent().siblings().find( "> .toggle-sub-menu i" ).removeClass("fa-minus").addClass("fa-plus");
154			if( _this.siblings( ".sub-menu, .children" ).hasClass( "isShow" ) ) {
155				_this.children().removeClass( "fa-plus" ).addClass( "fa-minus" );
156			} else {
157				_this.children().removeClass( "fa-minus" ).addClass( "fa-plus" );
158			}
159		});
160	}
161	dropdownMenuMobileHandle();
162
163}(jQuery) );