/** * navigation.js * * Handles toggling the navigation menu for small screens. */ ( function() { var container, button, menu; container = document.getElementById( 'site-navigation' ); if ( ! container ) { return; } button = container.getElementsByTagName( 'button' )[0]; if ( 'undefined' === typeof button ) { return; } menu = container.getElementsByTagName( 'ul' )[0]; // Hide menu toggle button if menu is empty and return early. if ( 'undefined' === typeof menu ) { button.style.display = 'none'; return; } menu.setAttribute( 'aria-expanded', 'false' ); if ( -1 === menu.className.indexOf( 'nav-menu' ) ) { menu.className += ' nav-menu'; } button.onclick = function() { if ( -1 !== container.className.indexOf( 'toggled' ) ) { container.className = container.className.replace( ' toggled', '' ); button.setAttribute( 'aria-expanded', 'false' ); menu.setAttribute( 'aria-expanded', 'false' ); } else { container.className += ' toggled'; button.setAttribute( 'aria-expanded', 'true' ); menu.setAttribute( 'aria-expanded', 'true' ); } }; // Fix child menus for touch devices. function fixMenuTouchTaps( container ) { var touchStartFn, parentLink = container.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' ); if ( 'ontouchstart' in window ) { touchStartFn = function( e ) { var menuItem = this.parentNode; if ( ! menuItem.classList.contains( 'focus' ) ) { e.preventDefault(); for( var i = 0; i < menuItem.parentNode.children.length; ++i ) { if ( menuItem === menuItem.parentNode.children[i] ) { continue; } menuItem.parentNode.children[i].classList.remove( 'focus' ); } menuItem.classList.add( 'focus' ); } else { menuItem.classList.remove( 'focus' ); } }; for ( var i = 0; i < parentLink.length; ++i ) { parentLink[i].addEventListener( 'touchstart', touchStartFn, false ) } } } fixMenuTouchTaps( container ); } )();