SalesforceCommerceCloud · vcua-mobify · Jan 23, 2026 · Jan 26, 2026 · Jan 30, 2026 · Jan 30, 2026
@@ -1,3 +1,6 @@
+## v5.2.0-dev
+- Update storefront preview to support base paths [#3666](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3666)
+
 ## v5.1.0-dev
 - Add Page Designer Support [#3727](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3727)
 - Bump commerce-sdk-isomorphic to 5.1.0 [#3725](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3725)
@@ -7,6 +10,8 @@
 
 ## v5.0.0 (Feb 12, 2026)
 - Upgrade to commerce-sdk-isomorphic v5.0.0 and introduce Payment Instrument SCAPI integration [#3552](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3552)
+
+## v4.4.0-dev (Dec 17, 2025)
 - [Bugfix] Ensure code_verifier can be optional in resetPassword call [#3567](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3567)
 - [Improvement] Strengthening typescript types on custom endpoint options and fetchOptions types [#3589](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3589)
 - [Feature] Update `authorizePasswordless`, `getPasswordResetToken`, and `resetPassword` to support use of `email` mode [#3525](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3525)

@@ -14,7 +14,16 @@ import {useCommerceApi, useConfig} from '../../hooks'
 
 declare global {
     interface Window {
-        STOREFRONT_PREVIEW?: Record<string, unknown>
+        STOREFRONT_PREVIEW?: {
+            getToken?: () => string | undefined | Promise<string | undefined>
+            onContextChange?: () => void | Promise<void>
+            siteId?: string
+            experimentalUnsafeNavigate?: (
+                path: string | {pathname: string; search?: string; hash?: string; state?: unknown},
+                action?: 'push' | 'replace',
+                ...args: unknown[]
+            ) => void
+        }
     }
 }
 
@@ -28,9 +37,24 @@ jest.mock('./utils', () => {
 jest.mock('../../auth/index.ts')
 jest.mock('../../hooks/useConfig', () => jest.fn())
 
+const mockPush = jest.fn()
+const mockReplace = jest.fn()
+jest.mock('react-router-dom', () => {
+    const actual = jest.requireActual('react-router-dom')
+    return {
+        ...actual,
+        useHistory: () => ({
+            push: mockPush,
+            replace: mockReplace
+        })
+    }
+})
+
 describe('Storefront Preview Component', function () {
     beforeEach(() => {
         delete window.STOREFRONT_PREVIEW
+        mockPush.mockClear()
+        mockReplace.mockClear()
         ;(useConfig as jest.Mock).mockReturnValue({siteId: 'site-id'})
     })
     afterEach(() => {
@@ -107,6 +131,88 @@ describe('Storefront Preview Component', function () {
         expect(window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate).toBeDefined()
     })
 
+    test('experimentalUnsafeNavigate removes base path from path when getBasePath is provided', () => {
+        ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
+
+        render(
+            <StorefrontPreview
+                enabled={true}
+                getToken={() => 'my-token'}
+                getBasePath={() => '/mybase'}
+            />
+        )
+
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.('/mybase/product/123', 'push')
+        expect(mockPush).toHaveBeenCalledWith('/product/123')
+
+        mockPush.mockClear()
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.('/mybase/account', 'replace')
+        expect(mockReplace).toHaveBeenCalledWith('/account')
+    })
+
+    test('experimentalUnsafeNavigate does not remove when path does not start with base path', () => {
+        ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
+
+        render(
+            <StorefrontPreview
+                enabled={true}
+                getToken={() => 'my-token'}
+                getBasePath={() => '/mybase'}
+            />
+        )
+
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.('/other/product/123', 'push')
+        expect(mockPush).toHaveBeenCalledWith('/other/product/123')
+    })
+
+    test('experimentalUnsafeNavigate does not strip when path has basePath only as substring (e.g. /shop vs /shopping/cart)', () => {
+        ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
+
+        render(
+            <StorefrontPreview
+                enabled={true}
+                getToken={() => 'my-token'}
+                getBasePath={() => '/shop'}
+            />
+        )
+
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.('/shopping/cart', 'push')
+        expect(mockPush).toHaveBeenCalledWith('/shopping/cart')
+    })
+
+    test('experimentalUnsafeNavigate strips to / when path exactly equals basePath', () => {
+        ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
+
+        render(
+            <StorefrontPreview
+                enabled={true}
+                getToken={() => 'my-token'}
+                getBasePath={() => '/mybase'}
+            />
+        )
+
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.('/mybase', 'push')
+        expect(mockPush).toHaveBeenCalledWith('/')
+    })
+
+    test('experimentalUnsafeNavigate removes base path from location object when getBasePath is provided', () => {
+        ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
+
+        render(
+            <StorefrontPreview
+                enabled={true}
+                getToken={() => 'my-token'}
+                getBasePath={() => '/mybase'}
+            />
+        )
+
+        window.STOREFRONT_PREVIEW?.experimentalUnsafeNavigate?.(
+            {pathname: '/mybase/product/123', search: '?q=1'},
+            'push'
+        )
+        expect(mockPush).toHaveBeenCalledWith({pathname: '/product/123', search: '?q=1'})
+    })
+
     test('cache breaker is added to the parameters of SCAPI requests, only if in storefront preview', () => {
         ;(detectStorefrontPreview as jest.Mock).mockReturnValue(true)
         mockQueryEndpoint('baskets/123', {})

@@ -17,20 +17,57 @@ type GetToken = () => string | undefined | Promise<string | undefined>
 type ContextChangeHandler = () => void | Promise<void>
 type OptionalWhenDisabled<T> = ({enabled?: true} & T) | ({enabled: false} & Partial<T>)
 
+/**
+ * Remove the base path from a path string.
+ * Only strips when path equals basePath or path starts with basePath + '/'.
+ */
+function removeBasePathFromPath(path: string, basePath: string): string {
+    const matches =
+        path.startsWith(basePath + '/') || path === basePath
+    return matches ? path.slice(basePath.length) || '/' : path
+}
+
+/**
+ * Strip the base path from a path
+ *
+ * React Router history re-adds the base path to the path, so we
+ * remove it here to avoid base path duplication.
+ */
+function removeBasePathFromLocation<T>(
+    pathOrLocation: LocationDescriptor<T>,
+    basePath: string
+): LocationDescriptor<T> {
+    if (!basePath) return pathOrLocation
+    if (typeof pathOrLocation === 'string') {
+        return removeBasePathFromPath(pathOrLocation, basePath) as LocationDescriptor<T>
+    }
+    const pathname = pathOrLocation.pathname ?? '/'
+    return {
+        ...pathOrLocation,
+        pathname: removeBasePathFromPath(pathname, basePath)
+    }
+}
+
 /**
  *
  * @param enabled - flag to turn on/off Storefront Preview feature. By default, it is set to true.
  * This flag only applies if storefront is running in a Runtime Admin iframe.
  * @param getToken - A method that returns the access token for the current user
+ * @param getBasePath - A method that returns the router base path of the app.
  */
 export const StorefrontPreview = ({
     children,
     enabled = true,
     getToken,
-    onContextChange
+    onContextChange,
+    getBasePath
 }: React.PropsWithChildren<
     // Props are only required when Storefront Preview is enabled
-    OptionalWhenDisabled<{getToken: GetToken; onContextChange?: ContextChangeHandler}>
+    OptionalWhenDisabled<{
+        getToken: GetToken
+        onContextChange?: ContextChangeHandler
+        getBasePath?: () => string
+    }>
 >) => {
     const history = useHistory()
     const isHostTrusted = detectStorefrontPreview()
@@ -39,6 +76,13 @@ export const StorefrontPreview = ({
 
     useEffect(() => {
         if (enabled && isHostTrusted) {
+            if (process.env.NODE_ENV !== 'production' && !getBasePath) {
+                console.warn(
+                    '[StorefrontPreview] No getBasePath prop provided. ' +
+                        'If your app uses a base path for router routes (showBasePath is true in url config), ' +
+                        'pass getBasePath to avoid base path duplication during navigation.'
+                )
+            }
             window.STOREFRONT_PREVIEW = {
                 ...window.STOREFRONT_PREVIEW,
                 getToken,
@@ -49,11 +93,13 @@ export const StorefrontPreview = ({
                     action: 'push' | 'replace' = 'push',
                     ...args: unknown[]
                 ) => {
-                    history[action](path, ...args)
+                    const basePath = getBasePath?.() ?? ''
+                    const pathWithoutBase = removeBasePathFromLocation(path, basePath)
+                    history[action](pathWithoutBase, ...args)
                 }
             }
         }
-    }, [enabled, getToken, onContextChange, siteId])
+    }, [enabled, getToken, onContextChange, siteId, getBasePath])
 
     useEffect(() => {
         if (enabled && isHostTrusted) {
@@ -99,7 +145,8 @@ StorefrontPreview.propTypes = {
     // to get to a place where both these props are simply optional and we will provide default implementations.
     // This would make the API simpler to use.
     getToken: CustomPropTypes.requiredFunctionWhenEnabled,
-    onContextChange: PropTypes.func
+    onContextChange: PropTypes.func,
+    getBasePath: PropTypes.func
 }
 
 export default StorefrontPreview
@@ -26,7 +26,6 @@ export const detectStorefrontPreview = () => {
 export const getClientScript = () => {
     const parentOrigin = getParentOrigin() ?? 'https://runtime.commercecloud.com'
     return parentOrigin === DEVELOPMENT_ORIGIN
-        // TODO: This will need to be updated to support base paths with storefront preview
         ? `${parentOrigin}${LOCAL_BUNDLE_PATH}/static/storefront-preview.js`
         : `${parentOrigin}/cc/b2c/preview/preview.client.js`
 }

@@ -1,3 +1,7 @@
+## v3.18.0-dev
+- Move envBasePath into ssrParameters [#3590](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3590)
+- Support adding base paths to shopper facing URLs [#3615](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3615)
+
 ## v3.17.0-dev
 - Add Salesforce Payments configuration to generated projects [#3725] (https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3725)
 - Clear verdaccio npm cache during project generation [#3652](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3652)

@@ -48,13 +48,19 @@ module.exports = {
             locale: 'path',
             // This boolean value dictates whether or not default site or locale values are shown in the url. Defaults to: false
             showDefaults: true,
+            // This boolean value dictates whether or not the base path, defined in ssrParameters.envBasePath,
+            // is shown in shopper facing urls. Defaults to: false
+            showBasePath: false,
             {{else}}
             // Determine where the siteRef is located. Valid values include 'path|query_param|none'. Defaults to: 'none'
             site: 'none',
             // Determine where the localeRef is located. Valid values include 'path|query_param|none'. Defaults to: 'none'
             locale: 'none',
             // This boolean value dictates whether or not default site or locale values are shown in the url. Defaults to: false
             showDefaults: false,
+            // This boolean value dictates whether or not the base path, defined in ssrParameters.envBasePath,
+            // is shown in shopper facing urls. Defaults to: false
+            showBasePath: false,
             {{/if}}
             // This boolean value dictates whether the plus sign (+) is interpreted as space for query param string. Defaults to: false
             interpretPlusSignAsSpace: false
@@ -176,10 +182,6 @@ module.exports = {
             apiKey: process.env.GOOGLE_CLOUD_API_KEY
         }
     },
-    // Experimental: The base path for the app. This is the path that will be prepended to all /mobify routes,
-    // callback routes, and Express routes.
-    // Setting this to `/` or an empty string will result in the above routes not having a base path.
-    envBasePath: '/',
     // This list contains server-side only libraries that you don't want to be compiled by webpack
     externals: [],
     // Page not found url for your app

@@ -48,13 +48,19 @@ module.exports = {
             locale: 'path',
             // This boolean value dictates whether default site or locale values are shown in the url. Defaults to: false
             showDefaults: true,
+            // This boolean value dictates whether or not the base path, defined in ssrParameters.envBasePath,
+            // is shown in shopper facing urls. Defaults to: false
+            showBasePath: false,
             {{else}}
             // Determine where the siteRef is located. Valid values include 'path|query_param|none'. Defaults to: 'none'
             site: 'none',
             // Determine where the localeRef is located. Valid values include 'path|query_param|none'. Defaults to: 'none'
             locale: 'none',
             // This boolean value dictates whether or not default site or locale values are shown in the url. Defaults to: false
             showDefaults: false,
+            // This boolean value dictates whether or not the base path, defined in ssrParameters.envBasePath,
+            // is shown in shopper facing urls. Defaults to: false
+            showBasePath: false,
             {{/if}}
             // This boolean value dictates whether the plus sign (+) is interpreted as space for query param string. Defaults to: false
             interpretPlusSignAsSpace: false

@@ -1,3 +1,6 @@
+## v3.18.0-dev
+- Move envBasePath into ssrParameters [#3590](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3590)
+
 ## v3.17.0-dev
 - Add Page Designer Design CSS Support [#3727](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3727)
 - Update jest, archiver and remove rimraf dependencies [#3663](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3663)

@@ -254,10 +254,16 @@ const main = async () => {
                 process.exit(1)
             }
 
+            // Load config to get envBasePath from ssrParameters for local development
+            // This mimics how MRT sets the MRT_ENV_BASE_PATH system environment variable
+            const config = getConfig() || {}
+            const envBasePath = config.ssrParameters?.envBasePath || ''
+
             execSync(`${babelNode} ${inspect ? '--inspect' : ''} ${babelArgs} ${entrypoint}`, {
                 env: {
                     ...process.env,
-                    ...(noHMR ? {HMR: 'false'} : {})
+                    ...(noHMR ? {HMR: 'false'} : {}),
+                    ...(envBasePath ? {MRT_ENV_BASE_PATH: envBasePath} : {})
                 }
             })
         })

@@ -1,3 +1,7 @@
+## v3.18.0-dev
+- Move envBasePath into ssrParameters [#3590](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3590)
+- Support adding base paths to shopper facing URLs [#3615](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3615)
+
 ## v3.17.0-dev
 - Update test setup for Jest 29 compatibility [#3663](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3663)
 - Add Node 24 support. Drop Node 16 support [#3652](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3652)

@@ -17,6 +17,7 @@ import {loadableReady} from '@loadable/component'
 import {uuidv4} from '../../utils/uuidv4.client'
 import PropTypes from 'prop-types'
 import logger from '../../utils/logger-instance'
+import {getRouterBasePath} from '../universal/utils'
 
 /* istanbul ignore next */
 export const registerServiceWorker = (url) => {
@@ -44,10 +45,11 @@ export const registerServiceWorker = (url) => {
 export const OuterApp = ({routes, error, WrappedApp, locals, onHydrate}) => {
     const AppConfig = getAppConfig()
     const isInitialPageRef = useRef(true)
+    const routerBasename = getRouterBasePath() || undefined
 
     return (
         <ServerContext.Provider value={{}}>
-            <Router ref={onHydrate}>
+            <Router ref={onHydrate} basename={routerBasename}>
                 <CorrelationIdProvider
                     correlationId={() => {
                         // If we are hydrating an error page use the server correlation id.

@@ -40,6 +40,8 @@ import logger from '../../utils/logger-instance'
 import PerformanceTimer from '../../utils/performance'
 import {PERFORMANCE_MARKS} from '../../utils/performance-marks'
 
+import {getRouterBasePath} from '../universal/utils'
+
 const CWD = process.cwd()
 const BUNDLES_PATH = path.resolve(CWD, 'build/loadable-stats.json')
 
@@ -270,9 +272,11 @@ export const render = (req, res, next) => {
 
 const OuterApp = ({req, res, error, App, appState, routes, routerContext, location}) => {
     const AppConfig = getAppConfig()
+    const routerBasename = getRouterBasePath() || undefined
+
     return (
         <ServerContext.Provider value={{req, res}}>
-            <Router location={location} context={routerContext}>
+            <Router location={location} context={routerContext} basename={routerBasename}>
                 <CorrelationIdProvider
                     correlationId={res.locals.requestId}
                     resetOnPageChange={false}
@@ -365,6 +369,7 @@ const renderApp = (args) => {
         __CONFIG__: config,
         __PRELOADED_STATE__: appState,
         __ERROR__: error,
+        __MRT_ENV_BASE_PATH__: process.env.MRT_ENV_BASE_PATH || '',
         // `window.Progressive` has a long history at Mobify and some
         // client-side code depends on it. Maintain its name out of tradition.
         Progressive: getWindowProgressive(req, res)