110 lines
3.7 KiB
JavaScript
110 lines
3.7 KiB
JavaScript
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/* global twentyseventeenScreenReaderText */
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/**
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* Theme functions file.
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*
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* Contains handlers for navigation and widget area.
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*/
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(function( $ ) {
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var masthead, menuToggle, siteNavContain, siteNavigation;
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function initMainNavigation( container ) {
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// Add dropdown toggle that displays child menu items.
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var dropdownToggle = $( '<button />', { 'class': 'dropdown-toggle', 'aria-expanded': false })
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.append( twentyseventeenScreenReaderText.icon )
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.append( $( '<span />', { 'class': 'screen-reader-text', text: twentyseventeenScreenReaderText.expand }) );
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container.find( '.menu-item-has-children > a, .page_item_has_children > a' ).after( dropdownToggle );
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// Set the active submenu dropdown toggle button initial state.
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container.find( '.current-menu-ancestor > button' )
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.addClass( 'toggled-on' )
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.attr( 'aria-expanded', 'true' )
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.find( '.screen-reader-text' )
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.text( twentyseventeenScreenReaderText.collapse );
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// Set the active submenu initial state.
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container.find( '.current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
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container.find( '.dropdown-toggle' ).click( function( e ) {
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var _this = $( this ),
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screenReaderSpan = _this.find( '.screen-reader-text' );
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e.preventDefault();
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_this.toggleClass( 'toggled-on' );
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_this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
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_this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
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screenReaderSpan.text( screenReaderSpan.text() === twentyseventeenScreenReaderText.expand ? twentyseventeenScreenReaderText.collapse : twentyseventeenScreenReaderText.expand );
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});
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}
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initMainNavigation( $( '.main-navigation' ) );
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masthead = $( '#masthead' );
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menuToggle = masthead.find( '.menu-toggle' );
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siteNavContain = masthead.find( '.main-navigation' );
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siteNavigation = masthead.find( '.main-navigation > div > ul' );
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// Enable menuToggle.
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(function() {
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// Return early if menuToggle is missing.
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if ( ! menuToggle.length ) {
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return;
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}
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// Add an initial value for the attribute.
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menuToggle.attr( 'aria-expanded', 'false' );
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menuToggle.on( 'click.twentyseventeen', function() {
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siteNavContain.toggleClass( 'toggled-on' );
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$( this ).attr( 'aria-expanded', siteNavContain.hasClass( 'toggled-on' ) );
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});
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})();
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// Fix sub-menus for touch devices and better focus for hidden submenu items for accessibility.
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(function() {
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if ( ! siteNavigation.length || ! siteNavigation.children().length ) {
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return;
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}
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// Toggle `focus` class to allow submenu access on tablets.
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function toggleFocusClassTouchScreen() {
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if ( 'none' === $( '.menu-toggle' ).css( 'display' ) ) {
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$( document.body ).on( 'touchstart.twentyseventeen', function( e ) {
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if ( ! $( e.target ).closest( '.main-navigation li' ).length ) {
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$( '.main-navigation li' ).removeClass( 'focus' );
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}
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});
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siteNavigation.find( '.menu-item-has-children > a, .page_item_has_children > a' )
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.on( 'touchstart.twentyseventeen', function( e ) {
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var el = $( this ).parent( 'li' );
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if ( ! el.hasClass( 'focus' ) ) {
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e.preventDefault();
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el.toggleClass( 'focus' );
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el.siblings( '.focus' ).removeClass( 'focus' );
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}
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});
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} else {
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siteNavigation.find( '.menu-item-has-children > a, .page_item_has_children > a' ).unbind( 'touchstart.twentyseventeen' );
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}
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}
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if ( 'ontouchstart' in window ) {
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$( window ).on( 'resize.twentyseventeen', toggleFocusClassTouchScreen );
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toggleFocusClassTouchScreen();
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}
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siteNavigation.find( 'a' ).on( 'focus.twentyseventeen blur.twentyseventeen', function() {
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$( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );
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});
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})();
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})( jQuery );
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