CaffGeek/MBACNationals

/**
 * Handles toggling the navigation menu for small screens and
 * accessibility for submenu items.
 */
( function() {
    var nav = document.getElementById( 'site-navigation' ), button, menu;
    if ( ! nav ) {
        return;
    }

    button = nav.getElementsByTagName( 'h3' )[0];
    menu   = nav.getElementsByTagName( 'ul' )[0];
    if ( ! button ) {
        return;
    }

    // Hide button if menu is missing or empty.
    if ( ! menu || ! menu.childNodes.length ) {
        button.style.display = 'none';
        return;
    }

    button.onclick = function() {
        if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
            menu.className = 'nav-menu';
        }

        if ( -1 !== button.className.indexOf( 'toggled-on' ) ) {
            button.className = button.className.replace( ' toggled-on', '' );
            menu.className = menu.className.replace( ' toggled-on', '' );
        } else {
            button.className += ' toggled-on';
            menu.className += ' toggled-on';
        }
    };
} )();

// Better focus for hidden submenu items for accessibility.
( function( $ ) {
    $( '.main-navigation' ).find( 'a' ).on( 'focus.twentytwelve blur.twentytwelve', function() {
        $( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );
    } );
} )( jQuery );