https://www.imedware.com/blog/wp-content/themes/twentythirteen/js/functions.js?ver=20160717

1/**
2 * Functionality specific to Twenty Thirteen.
3 *
4 * Provides helper functions to enhance the theme experience.
5 */
6
7( function( $ ) {
8	var body    = $( 'body' ),
9	    _window = $( window ),
10		nav, button, menu;
11
12	nav = $( '#site-navigation' );
13	button = nav.find( '.menu-toggle' );
14	menu = nav.find( '.nav-menu' );
15
16	/**
17	 * Adds a top margin to the footer if the sidebar widget area is higher
18	 * than the rest of the page, to help the footer always visually clear
19	 * the sidebar.
20	 */
21	$( function() {
22		if ( body.is( '.sidebar' ) ) {
23			var sidebar   = $( '#secondary .widget-area' ),
24			    secondary = ( 0 === sidebar.length ) ? -40 : sidebar.height(),
25			    margin    = $( '#tertiary .widget-area' ).height() - $( '#content' ).height() - secondary;
26
27			if ( margin > 0 && _window.innerWidth() > 999 ) {
28				$( '#colophon' ).css( 'margin-top', margin + 'px' );
29			}
30		}
31	} );
32
33	/**
34	 * Enables menu toggle for small screens.
35	 */
36	( function() {
37		if ( ! nav.length || ! button.length ) {
38			return;
39		}
40
41		// Hide button if menu is missing or empty.
42		if ( ! menu.length || ! menu.children().length ) {
43			button.hide();
44			return;
45		}
46
47		button.on( 'click.twentythirteen', function() {
48			nav.toggleClass( 'toggled-on' );
49			if ( nav.hasClass( 'toggled-on' ) ) {
50				$( this ).attr( 'aria-expanded', 'true' );
51				menu.attr( 'aria-expanded', 'true' );
52			} else {
53				$( this ).attr( 'aria-expanded', 'false' );
54				menu.attr( 'aria-expanded', 'false' );
55			}
56		} );
57
58		// Fix sub-menus for touch devices.
59		if ( 'ontouchstart' in window ) {
60			menu.find( '.menu-item-has-children > a, .page_item_has_children > a' ).on( 'touchstart.twentythirteen', function( e ) {
61				var el = $( this ).parent( 'li' );
62
63				if ( ! el.hasClass( 'focus' ) ) {
64					e.preventDefault();
65					el.toggleClass( 'focus' );
66					el.siblings( '.focus' ).removeClass( 'focus' );
67				}
68			} );
69		}
70
71		// Better focus for hidden submenu items for accessibility.
72		menu.find( 'a' ).on( 'focus.twentythirteen blur.twentythirteen', function() {
73			$( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );
74		} );
75	} )();
76
77	/**
78	 * Add or remove ARIA attributes.
79	 *
80	 * Uses jQuery's width() function to determine the size of the window and add
81	 * the default ARIA attributes for the menu toggle if it's visible.
82	 *
83	 * @since Twenty Thirteen 1.5
84	 */
85	function onResizeARIA() {
86		if ( 643 > _window.width() ) {
87			button.attr( 'aria-expanded', 'false' );
88			menu.attr( 'aria-expanded', 'false' );
89			button.attr( 'aria-controls', 'primary-menu' );
90		} else {
91			button.removeAttr( 'aria-expanded' );
92			menu.removeAttr( 'aria-expanded' );
93			button.removeAttr( 'aria-controls' );
94		}
95	}
96
97	_window
98		.on( 'load.twentythirteen', onResizeARIA )
99		.on( 'resize.twentythirteen', function() {
100			onResizeARIA();
101	} );
102
103	/**
104	 * Makes "skip to content" link work correctly in IE9 and Chrome for better
105	 * accessibility.
106	 *
107	 * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
108	 */
109	_window.on( 'hashchange.twentythirteen', function() {
110		var element = document.getElementById( location.hash.substring( 1 ) );
111
112		if ( element ) {
113			if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) {
114				element.tabIndex = -1;
115			}
116
117			element.focus();
118		}
119	} );
120
121	/**
122	 * Arranges footer widgets vertically.
123	 */
124	$( function() {
125		var columnWidth, widgetArea;
126		if ( ! $.isFunction( $.fn.masonry ) ) {
127			return;
128		}
129		columnWidth = body.is( '.sidebar' ) ? 228 : 245;
130		widgetArea = $( '#secondary .widget-area' );
131
132		widgetArea.masonry( {
133			itemSelector: '.widget',
134			columnWidth: columnWidth,
135			gutterWidth: 20,
136			isRTL: body.is( '.rtl' )
137		} );
138
139		if ( 'undefined' !== typeof wp && wp.customize && wp.customize.selectiveRefresh ) {
140
141			// Retain previous masonry-brick initial position.
142			wp.customize.selectiveRefresh.bind( 'partial-content-rendered', function( placement ) {
143				var copyPosition = (
144					placement.partial.extended( wp.customize.widgetsPreview.WidgetPartial ) &&
145					placement.removedNodes instanceof jQuery &&
146					placement.removedNodes.is( '.masonry-brick' ) &&
147					placement.container instanceof jQuery
148				);
149				if ( copyPosition ) {
150					placement.container.css( {
151						position: placement.removedNodes.css( 'position' ),

152						top: placement.removedNodes.css( 'top' ),
153						left: placement.removedNodes.css( 'left' )
154					} );
155				}
156			} );
157
158			// Re-arrange footer widgets when sidebar is updated via selective refresh in the Customizer.
159			wp.customize.selectiveRefresh.bind( 'sidebar-updated', function( sidebarPartial ) {
160				if ( 'sidebar-1' === sidebarPartial.sidebarId ) {
161					widgetArea.masonry( 'reloadItems' );
162					widgetArea.masonry( 'layout' );
163				}
164			} );
165		}
166	} );
167} )( jQuery );