( function( $ ) {
var $body, $window, $sidebar, adminbarOffset, top = false,
bottom = false, windowWidth, windowHeight, lastWindowPos = 0,
- topOffset = 0, bodyHeight, sidebarHeight, resizeTimer;
-
- // Add dropdown toggle that display child menu items.
- $( '.main-navigation .page_item_has_children > a, .main-navigation .menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' );
-
- $( '.dropdown-toggle' ).click( function( e ) {
- var _this = $( this );
- e.preventDefault();
- _this.toggleClass( 'toggle-on' );
- _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
- _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
- _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
- } );
+ topOffset = 0, bodyHeight, sidebarHeight, resizeTimer,
+ secondary, button;
+
+ function initMainNavigation( container ) {
+ // Add dropdown toggle that display child menu items.
+ container.find( '.menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' );
+
+ // Toggle buttons and submenu items with active children menu items.
+ container.find( '.current-menu-ancestor > button' ).addClass( 'toggle-on' );
+ container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
+
+ container.find( '.dropdown-toggle' ).click( function( e ) {
+ var _this = $( this );
+ e.preventDefault();
+ _this.toggleClass( 'toggle-on' );
+ _this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
+ _this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
+ _this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
+ } );
+ }
+ initMainNavigation( $( '.main-navigation' ) );
+
+ // Re-initialize the main navigation when it is updated, persisting any existing submenu expanded states.
+ $( document ).on( 'customize-preview-menu-refreshed', function( e, params ) {
+ if ( 'primary' === params.wpNavMenuArgs.theme_location ) {
+ initMainNavigation( params.newContainer );
+
+ // Re-sync expanded states from oldContainer.
+ params.oldContainer.find( '.dropdown-toggle.toggle-on' ).each(function() {
+ var containerId = $( this ).parent().prop( 'id' );
+ $( params.newContainer ).find( '#' + containerId + ' > .dropdown-toggle' ).triggerHandler( 'click' );
+ });
+ }
+ });
+
+ secondary = $( '#secondary' );
+ button = $( '.site-branding' ).find( '.secondary-toggle' );
// Enable menu toggle for small screens.
( function() {
- var secondary = $( '#secondary' ), button, menu, widgets, social;
- if ( ! secondary ) {
- return;
- }
-
- button = $( '.site-branding' ).find( '.secondary-toggle' );
- if ( ! button ) {
+ var menu, widgets, social;
+ if ( ! secondary.length || ! button.length ) {
return;
}
menu = secondary.find( '.nav-menu' );
widgets = secondary.find( '#widget-area' );
social = secondary.find( '#social-navigation' );
- if ( ! widgets.length && ! social.length && ( ! menu || ! menu.children().length ) ) {
+ if ( ! widgets.length && ! social.length && ( ! menu.length || ! menu.children().length ) ) {
button.hide();
return;
}
secondary.toggleClass( 'toggled-on' );
secondary.trigger( 'resize' );
$( this ).toggleClass( 'toggled-on' );
+ if ( $( this, secondary ).hasClass( 'toggled-on' ) ) {
+ $( this ).attr( 'aria-expanded', 'true' );
+ secondary.attr( 'aria-expanded', 'true' );
+ } else {
+ $( this ).attr( 'aria-expanded', 'false' );
+ secondary.attr( 'aria-expanded', 'false' );
+ }
} );
} )();
+ /**
+ * @summary Add or remove ARIA attributes.
+ * Uses jQuery's width() function to determine the size of the window and add
+ * the default ARIA attributes for the menu toggle if it's visible.
+ * @since Twenty Fifteen 1.1
+ */
+ function onResizeARIA() {
+ if ( 955 > $window.width() ) {
+ button.attr( 'aria-expanded', 'false' );
+ secondary.attr( 'aria-expanded', 'false' );
+ button.attr( 'aria-controls', 'secondary' );
+ } else {
+ button.removeAttr( 'aria-expanded' );
+ secondary.removeAttr( 'aria-expanded' );
+ button.removeAttr( 'aria-controls' );
+ }
+ }
+
// Sidebar scrolling.
function resize() {
- windowWidth = $window.width();
- windowHeight = $window.height();
- bodyHeight = $body.height();
- sidebarHeight = $sidebar.height();
+ windowWidth = $window.width();
if ( 955 > windowWidth ) {
top = bottom = false;
return;
}
+ sidebarHeight = $sidebar.height();
+ windowHeight = $window.height();
+ bodyHeight = $body.height();
+
if ( sidebarHeight + adminbarOffset > windowHeight ) {
if ( windowPos > lastWindowPos ) {
if ( top ) {
$window
.on( 'scroll.twentyfifteen', scroll )
+ .on( 'load.twentyfifteen', onResizeARIA )
.on( 'resize.twentyfifteen', function() {
clearTimeout( resizeTimer );
resizeTimer = setTimeout( resizeAndScroll, 500 );
+ onResizeARIA();
} );
- $sidebar.on( 'click keydown', 'button', resizeAndScroll );
+ $sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll );
resizeAndScroll();