fix(storefront): BCTHEME-409 Update focus trap in Modal

bigcommerce · Feb 28, 2021 · e937756 · e937756
1 parent b66bd69
commit e937756
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Showing 9 changed files with 3,056 additions and 6,433 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## Draft
+- Update focus trap in Modal. [#1998](https://github.com/bigcommerce/cornerstone/pull/1998)
 
 ## 5.2.0 (02-22-2021)
 - Fixed cut off on Cart button when Zooming up to 400%. [#1988](https://github.com/bigcommerce/cornerstone/pull/1988)

diff --git a/assets/js/theme/cart.js b/assets/js/theme/cart.js
@@ -3,7 +3,7 @@ import { bind, debounce } from 'lodash';
 import giftCertCheck from './common/gift-certificate-validator';
 import utils from '@bigcommerce/stencil-utils';
 import ShippingEstimator from './cart/shipping-estimator';
-import { defaultModal, modalTypes } from './global/modal';
+import { defaultModal } from './global/modal';
 import swal from './global/sweet-alert';
 import CartItemDetails from './common/cart-item-details';
 
@@ -157,7 +157,7 @@ export default class Cart extends PageManager {
 
             this.bindGiftWrappingForm();
 
-            modal.setupFocusableElements(modalTypes.CART_CHANGE_PRODUCT);
+            modal.setupFocusTrap();
         });
 
         utils.hooks.on('product-option-change', (event, currentTarget) => {

diff --git a/assets/js/theme/common/faceted-search.js b/assets/js/theme/common/faceted-search.js
@@ -2,13 +2,11 @@ import { hooks, api } from '@bigcommerce/stencil-utils';
 import _ from 'lodash';
 import Url from 'url';
 import urlUtils from './utils/url-utils';
-import modalFactory, { modalTypes, ModalEvents } from '../global/modal';
+import modalFactory, { ModalEvents } from '../global/modal';
 import collapsibleFactory from './collapsible';
 import { Validators } from './utils/form-utils';
 import nod from './nod';
 
-const { SHOW_MORE_OPTIONS } = modalTypes;
-const { opened } = ModalEvents;
 
 const defaultOptions = {
     accordionToggleSelector: '#facetedSearch .accordion-navigation, #facetedSearch .facetedSearch-toggle',
@@ -60,10 +58,10 @@ class FacetedSearch {
         this.collapsedFacetItems = [];
 
         if (this.options.modal) {
-            this.options.modal.$modal.on(opened, event => {
+            this.options.modal.$modal.on(ModalEvents.opened, event => {
                 const $filterItems = $(event.target).find('#facetedSearch-filterItems');
                 if ($filterItems.length) {
-                    this.options.modal.setupFocusableElements(SHOW_MORE_OPTIONS);
+                    this.options.modal.setupFocusTrap();
                 }
             });
         }

diff --git a/assets/js/theme/common/product-details.js b/assets/js/theme/common/product-details.js
@@ -3,7 +3,7 @@ import ProductDetailsBase, { optionChangeDecorator } from './product-details-bas
 import 'foundation-sites/js/foundation/foundation';
 import 'foundation-sites/js/foundation/foundation.reveal';
 import ImageGallery from '../product/image-gallery';
-import modalFactory, { showAlertModal, modalTypes } from '../global/modal';
+import modalFactory, { showAlertModal } from '../global/modal';
 import { isEmpty, isPlainObject } from 'lodash';
 import { normalizeFormData } from './utils/api';
 import { isBrowserIE, convertIntoArray } from './utils/ie-helpers';
@@ -361,7 +361,8 @@ export default class ProductDetails extends ProductDetailsBase {
             if (this.previewModal) {
                 this.previewModal.open();
 
-                this.updateCartContent(this.previewModal, response.data.cart_item.id, () => this.previewModal.setupFocusableElements(modalTypes.PRODUCT_DETAILS));
+                if ($addToCartBtn.parents('.quickView').length === 0) this.previewModal.$preModalFocusedEl = $addToCartBtn;
+                this.updateCartContent(this.previewModal, response.data.cart_item.id, () => this.previewModal.setupFocusTrap());
             } else {
                 this.$overlay.show();
                 // if no modal, redirect to the cart page

diff --git a/assets/js/theme/global/modal.js b/assets/js/theme/global/modal.js
@@ -1,49 +1,17 @@
-import 'jquery.tabbable';
 import foundation from './foundation';
+import * as focusTrap from 'focus-trap';
 
 const bodyActiveClass = 'has-activeModal';
 const loadingOverlayClass = 'loadingOverlay';
 const modalBodyClass = 'modal-body';
 const modalContentClass = 'modal-content';
 
-const allTabbableElementsSelector = ':tabbable';
-const tabKeyCode = 9;
-const firstTabbableClass = 'first-tabbable';
-const lastTabbableClass = 'last-tabbable';
-
 const SizeClasses = {
     small: 'modal--small',
     large: 'modal--large',
     normal: '',
 };
 
-export const modalTypes = {
-    QUICK_VIEW: 'forQuickView',
-    PRODUCT_DETAILS: 'forProductDetails',
-    CART_CHANGE_PRODUCT: 'forCartChangeProduct',
-    WRITE_REVIEW: 'forWriteReview',
-    SHOW_MORE_OPTIONS: 'forShowMore',
-};
-
-const findRootModalTabbableElements = () => (
-    $('#modal.open')
-        .find(allTabbableElementsSelector)
-        .not('#modal-review-form *')
-        .not('#previewModal *')
-);
-
-const focusableElements = {
-    [modalTypes.QUICK_VIEW]: findRootModalTabbableElements,
-    [modalTypes.PRODUCT_DETAILS]: () => (
-        $('#previewModal.open').find(allTabbableElementsSelector)
-    ),
-    [modalTypes.CART_CHANGE_PRODUCT]: findRootModalTabbableElements,
-    [modalTypes.WRITE_REVIEW]: () => (
-        $('#modal-review-form.open').find(allTabbableElementsSelector)
-    ),
-    [modalTypes.SHOW_MORE_OPTIONS]: findRootModalTabbableElements,
-};
-
 export const ModalEvents = {
     close: 'close.fndtn.reveal',
     closed: 'closed.fndtn.reveal',
@@ -139,6 +107,7 @@ export class Modal {
         this.size = this.defaultSize;
         this.pending = false;
         this.$preModalFocusedEl = null;
+        this.focusTrap = null;
 
         this.onModalOpen = this.onModalOpen.bind(this);
         this.onModalOpened = this.onModalOpened.bind(this);
@@ -228,64 +197,18 @@ export class Modal {
         this.$content.html('');
     }
 
-    setupFocusableElements(modalType) {
-        this.$preModalFocusedEl = $(document.activeElement);
-        const $modalTabbableCollection = focusableElements[modalType]();
-
-        const elementToFocus = $modalTabbableCollection.get(0);
-        if (elementToFocus) elementToFocus.focus();
-
-        this.$modal.on('keydown', event => this.onTabbing(event, modalType));
-    }
-
-    onTabbing(event, modalType) {
-        const isTab = event.which === tabKeyCode;
-
-        if (!isTab) return;
-
-        const $modalTabbableCollection = focusableElements[modalType]();
-        const modalTabbableCollectionLength = $modalTabbableCollection.length;
+    setupFocusTrap() {
+        if (!this.$preModalFocusedEl) this.$preModalFocusedEl = $(document.activeElement);
 
-        if (modalTabbableCollectionLength < 1) return;
-
-        const lastCollectionIdx = modalTabbableCollectionLength - 1;
-        const $firstTabbable = $modalTabbableCollection.get(0);
-        const $lastTabbable = $modalTabbableCollection.get(lastCollectionIdx);
-
-        $modalTabbableCollection.each((index, element) => {
-            const $element = $(element);
-
-            if (modalTabbableCollectionLength === 1) {
-                $element.addClass(`${firstTabbableClass} ${lastTabbableClass}`);
-                return false;
-            }
-
-            if ($element.is($firstTabbable)) {
-                $element.addClass(firstTabbableClass).removeClass(lastTabbableClass);
-            } else if ($element.is($lastTabbable)) {
-                $element.addClass(lastTabbableClass).removeClass(firstTabbableClass);
-            } else {
-                $element.removeClass(firstTabbableClass).removeClass(lastTabbableClass);
-            }
-        });
-
-        const direction = (isTab && event.shiftKey) ? 'backwards' : 'forwards';
-
-        const $activeElement = $(document.activeElement);
-
-        if (direction === 'forwards') {
-            const isLastActive = $activeElement.hasClass(lastTabbableClass);
-            if (isLastActive) {
-                $firstTabbable.focus();
-                event.preventDefault();
-            }
-        } else if (direction === 'backwards') {
-            const isFirstActive = $activeElement.hasClass(firstTabbableClass);
-            if (isFirstActive) {
-                $lastTabbable.focus();
-                event.preventDefault();
-            }
+        if (!this.focusTrap) {
+            this.focusTrap = focusTrap.createFocusTrap(this.$modal[0], {
+                escapeDeactivates: false,
+                returnFocusOnDeactivate: false,
+            });
         }
+
+        this.focusTrap.deactivate();
+        this.focusTrap.activate();
     }
 
     onModalClose() {
@@ -294,9 +217,12 @@ export class Modal {
 
     onModalClosed() {
         this.size = this.defaultSize;
+
+        if (this.focusTrap) this.focusTrap.deactivate();
+
         if (this.$preModalFocusedEl) this.$preModalFocusedEl.focus();
+
         this.$preModalFocusedEl = null;
-        this.$modal.off('keydown');
     }
 
     onModalOpen() {

diff --git a/assets/js/theme/global/quick-view.js b/assets/js/theme/global/quick-view.js
@@ -2,7 +2,7 @@ import 'foundation-sites/js/foundation/foundation';
 import 'foundation-sites/js/foundation/foundation.dropdown';
 import utils from '@bigcommerce/stencil-utils';
 import ProductDetails from '../common/product-details';
-import { defaultModal, modalTypes } from './modal';
+import { defaultModal } from './modal';
 import 'slick-carousel';
 import { onCarouselChange } from '../common/carousel';
 
@@ -30,7 +30,7 @@ export default function (context) {
                 $carousel.slick();
             }
 
-            modal.setupFocusableElements(modalTypes.QUICK_VIEW);
+            modal.setupFocusTrap();
 
             return new ProductDetails(modal.$content.find('.quickView'), context);
         });

diff --git a/assets/js/theme/product.js b/assets/js/theme/product.js
@@ -7,9 +7,7 @@ import collapsibleFactory from './common/collapsible';
 import ProductDetails from './common/product-details';
 import videoGallery from './product/video-gallery';
 import { classifyForm } from './common/utils/form-utils';
-import modalFactory, { modalTypes } from './global/modal';
-
-const { WRITE_REVIEW } = modalTypes;
+import modalFactory, { ModalEvents } from './global/modal';
 
 export default class Product extends PageManager {
     constructor(context) {
@@ -46,7 +44,7 @@ export default class Product extends PageManager {
 
         const review = new Review($reviewForm);
 
-        $(document).on('opened.fndtn.reveal', '#modal-review-form', () => this.reviewModal.setupFocusableElements(WRITE_REVIEW));
+        $(document).on(ModalEvents.opened, '#modal-review-form', () => this.reviewModal.setupFocusTrap());
 
         $('body').on('click', '[data-reveal-id="modal-review-form"]', () => {
             validator = review.registerValidation(this.context);