File: //home/cga.org.uk/public_html/wp-content/themes/blogzee/assets/js/navigation.js
/**
* File navigation.js.
*
* Handles toggling the navigation menu for small screens and enables TAB key
* navigation support for dropdown menus.
*/
( function( $ ) {
const siteNavigation = document.getElementById( 'site-navigation' ), KEYCODE_TAB = 9;
// Return early if the navigation doesn't exist.
if ( ! siteNavigation ) {
return;
}
const button = siteNavigation.getElementsByTagName( 'button' )[ 0 ];
// Return early if the button doesn't exist.
if ( 'undefined' === typeof button ) {
return;
}
const menu = siteNavigation.getElementsByTagName( 'ul' )[ 0 ];
// Hide menu toggle button if menu is empty and return early.
if ( 'undefined' === typeof menu ) {
button.style.display = 'none';
return;
}
if ( ! menu.classList.contains( 'nav-menu' ) ) {
menu.classList.add( 'nav-menu' );
}
// Toggle the .toggled class and the aria-expanded value each time the button is clicked.
button.addEventListener( 'click', function() {
siteNavigation.classList.toggle( 'toggled' );
if ( button.getAttribute( 'aria-expanded' ) === 'true' ) {
button.setAttribute( 'aria-expanded', 'false' );
} else {
button.setAttribute( 'aria-expanded', 'true' );
}
// focus trap for menu
var menuElement = document.querySelector( '#site-navigation.toggled' );
if( menuElement ) {
document.addEventListener('keydown', function(e) {
if( document.querySelector( '#site-navigation.toggled' ) ) {
var focusable = document.querySelector( '#site-navigation.toggled' ).querySelectorAll( 'input, a, button, ul.sub-menu.isShow a' );
focusable = Array.prototype.slice.call( focusable );
focusable = focusable.filter( function( focusableelement ) {
return null !== focusableelement.offsetParent;
} );
var firstFocusable = document.querySelector('.menu-toggle');
var lastFocusable = focusable[focusable.length - 1];
blogzee_focus_trap( firstFocusable, lastFocusable, e );
}
})
}
});
// focus trap for search
const searchElement = document.getElementsByClassName( 'search-wrap' )
if( searchElement.length > 0 ) {
const searchButton = searchElement[0].getElementsByTagName( 'button' )[ 0 ];
searchButton.addEventListener( 'click', function() {
var searchElementToggled = document.querySelector( '.search-wrap' );
if( searchElementToggled ) {
document.addEventListener('keydown', function(e) {
if( document.querySelector( '.search-wrap' ) ) {
var focusable = document.querySelector( '.search-wrap' ).querySelectorAll( 'input.search-field, input.search-submit, button.search-form-close' );
focusable = Array.prototype.slice.call( focusable );
focusable = focusable.filter( function( focusableelement ) {
return null !== focusableelement.offsetParent;
} );
var firstFocusable = document.querySelector('input.search-field');
var lastFocusable = focusable[focusable.length - 1];
blogzee_focus_trap( firstFocusable, lastFocusable, e );
if( e.which == 13 && e.target == document.querySelector('button.search-form-close') ) {
document.querySelector('button.search-form-close').click()
document.querySelector('button.search-trigger').focus()
e.preventDefault()
}
}
})
}
});
}
// Focus trap for off-canvas
const offCanvasWrapper = document.getElementsByClassName( 'blogzee-canvas-menu' )
if( offCanvasWrapper.length > 0 ) {
const offCanvasButton = offCanvasWrapper[ 0 ].getElementsByClassName( 'canvas-menu-icon' )[ 0 ]
const offCanvas = offCanvasWrapper[ 0 ].getElementsByClassName( 'canvas-menu-sidebar' )[ 0 ]
offCanvasButton.addEventListener( 'click', function(){
document.addEventListener('keydown', function(e) {
if( document.body.classList.contains( 'blogzee-model-open' ) ) {
if( offCanvas.children.length <= 0 ) {
document.querySelector( '.blogzee-canvas-menu' ).focus()
if( e.which == 13 && e.target == document.querySelector( '.canvas-menu-icon' ) ) document.querySelector( '.canvas-menu-icon' ).click()
e.preventDefault()
} else {
var focusable = offCanvas.querySelectorAll( 'input, a, button' );
focusable = Array.prototype.slice.call( focusable );
focusable = focusable.filter( function( focusableelement ) {
return null !== focusableelement.offsetParent;
} );
var firstFocusable = document.querySelector( '.canvas-menu-icon' )
var lastFocusable = focusable[focusable.length - 1];
blogzee_focus_trap( firstFocusable, lastFocusable, e );
if( e.which == 13 && e.target == document.querySelector( '.canvas-menu-icon' ) && document.body.classList.contains( 'blogzee-model-open' ) ) {
document.querySelector( '.canvas-menu-icon' ).click()
document.querySelector( '.blogzee-canvas-menu' ).focus()
e.preventDefault()
}
}
}
})
})
}
// Remove the .toggled class and set aria-expanded to false when the user clicks outside the navigation.
document.addEventListener( 'click', function( event ) {
const isClickInside = siteNavigation.contains( event.target );
if ( ! isClickInside ) {
siteNavigation.classList.remove( 'toggled' );
button.setAttribute( 'aria-expanded', 'false' );
}
} );
// Get all the link elements within the menu.
const links = menu.getElementsByTagName( 'a' );
// Get all the link elements with children within the menu.
const linksWithChildren = menu.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' );
// Toggle focus each time a menu link is focused or blurred.
for ( const link of links ) {
link.addEventListener( 'focus', toggleFocus, true );
link.addEventListener( 'blur', toggleFocus, true );
}
// Toggle focus each time a menu link with children receive a touch event.
for ( const link of linksWithChildren ) {
link.addEventListener( 'touchstart', toggleFocus, false );
}
/**
* Sets or removes .focus class on an element.
*/
function toggleFocus() {
if ( event.type === 'focus' || event.type === 'blur' ) {
let self = this;
// Move up through the ancestors of the current link until we hit .nav-menu.
while ( ! self.classList.contains( 'nav-menu' ) ) {
// On li elements toggle the class .focus.
if ( 'li' === self.tagName.toLowerCase() ) {
self.classList.toggle( 'focus' );
}
self = self.parentNode;
}
}
if ( event.type === 'touchstart' ) {
const menuItem = this.parentNode;
event.preventDefault();
for ( const link of menuItem.parentNode.children ) {
if ( menuItem !== link ) {
link.classList.remove( 'focus' );
}
}
menuItem.classList.toggle( 'focus' );
}
}
/**
* Responsive header menu modal
*
* @returns void
* @since 1.0.0
*/
function blogzee_focus_trap( firstFocusable, lastFocusable, e ) {
if (e.key === 'Tab' || e.keyCode === KEYCODE_TAB) {
if ( e.shiftKey ) /* shift + tab */ {
if (document.activeElement === firstFocusable) {
lastFocusable.focus();
e.preventDefault();
}
} else /* tab */ {
if ( document.activeElement === lastFocusable ) {
firstFocusable.focus();
e.preventDefault();
}
}
}
}
/**
* Responsive header sub menu toggler
*
* @returns void
* @since 1.0.0
*/
function dropdownMenuMobileHandle() {
if ( ! $( "#site-navigation .menu-item.menu-item-has-children" ).length > 0 && ! $( "#site-navigation .page_item.page_item_has_children" ).length > 0 ) {
return;
}
$( "#site-navigation .menu-item.menu-item-has-children .sub-menu, #site-navigation .page_item.page_item_has_children .children" ).before( '<a href="#" class="toggle-sub-menu"><i class="fas fa-plus"></i></a>' );
$(document).on( "click", "#site-navigation .toggle-sub-menu", function (e) {
e.preventDefault();
var _this = $(this)
_this.parent().siblings().children( ".sub-menu, .children" ).removeClass( "isShow" ); // removing isShow class from first childs of each sibling
_this.siblings( ".sub-menu, .children" ).toggleClass( "isShow" ); // toggle isShow class in its sibling having sub-menu class
_this.parent().siblings().find( "> .toggle-sub-menu i" ).removeClass("fa-minus").addClass("fa-plus"); // changing icon of parent siblings
if( _this.siblings( ".sub-menu, .children" ).hasClass( "isShow" ) ) { // if has icon change this icon
_this.children().removeClass( "fa-plus" ).addClass( "fa-minus" );
} else {
_this.children().removeClass( "fa-minus" ).addClass( "fa-plus" );
}
});
}
dropdownMenuMobileHandle();
/* Responsive builder menu focus trap */
const builderToggleButton = document.querySelector( '.bb-bldr--responsive .canvas-menu-icon' )
const builderNavigationElement = document.querySelector( '.bb-bldr--responsive #site-navigation' )
if( builderToggleButton ) {
builderToggleButton.addEventListener( 'click', function() {
builderNavigationElement.classList.toggle( 'toggled' );
// focus trap for menu
var menuElement = document.querySelector( '.bb-bldr-widget #site-navigation.toggled' );
if( menuElement ) {
document.addEventListener('keydown', function(e) {
var focusable = menuElement.querySelectorAll( 'input, a, button, ul.sub-menu.isShow a' );
focusable = Array.prototype.slice.call( focusable );
focusable = focusable.filter( function( focusableelement ) {
return null !== focusableelement.offsetParent;
} );
var firstFocusable = builderToggleButton
var lastFocusable = focusable[focusable.length - 1];
blogzee_focus_trap( firstFocusable, lastFocusable, e );
})
}
});
}
}( jQuery ) );