openedx · edx-requirements-bot · Jan 12, 2026 · Dec 22, 2025 · Jan 5, 2026 · Jan 9, 2026
diff --git a/README.md b/README.md
@@ -514,10 +514,34 @@ Paragon components can have different behavior in the MFE environment. `example`
 
 Steps to install the `example` app.
 
+To set up the example app with a local Tutor installation, you'll need to configure a Tutor plugin to handle CORS settings
+
+Prerequisites.
+
+Before running the example app, ensure you have a local Tutor installation configured.
+1. Create a new file (i.e. `paragon-example-app.py`) in your tutor plugins folder (`tutor plugins printroot` to get the path).
+2. Add the following content to the paragon-example-app.py file:
+```
+from tutor import hooks
+
+hooks.Filters.ENV_PATCHES.add_item(
+  (
+    "openedx-lms-development-settings",
+    """
+CORS_ORIGIN_WHITELIST.append("http://localhost:8080")
+LOGIN_REDIRECT_WHITELIST.append("http://localhost:8080")
+CSRF_TRUSTED_ORIGINS.append("http://localhost:8080")
+    """
+    )
+)
+```
+3. Enable the plugin: `tutor plugins enable paragon-example-app`
+4. Apply configuration changes: `tutor config save` && `tutor dev restart`
+
+Running the Example App:
 1. `npm install` to install dependencies.
-2. Launch any devstack. It is required for MFE to login into the system and set up configs.
-3. `npm run start-example-mfe` to start the app.
-4. Go to the `example/src/MyComponent.jsx` and use Paragon components inside the MFE environment.
+2. `npm run example:start` to start the app.
+3. Go to the `example/src/MyComponent.jsx` and use Paragon components inside the MFE environment.
 
 ## Semantic Release
 

diff --git a/example/.env.development b/example/.env.development
@@ -1,4 +1,8 @@
-NODE_ENV='development'
-REFRESH_ACCESS_TOKEN_ENDPOINT='http://localhost:18000/login_refresh'
-LMS_BASE_URL='http://localhost:18000'
-ACCESS_TOKEN_COOKIE_NAME='edx-jwt-cookie-header-payload'
+NODE_ENV=development
+REFRESH_ACCESS_TOKEN_ENDPOINT=http://local.openedx.io:8000/login_refresh
+LMS_BASE_URL=http://local.openedx.io:8000
+ACCESS_TOKEN_COOKIE_NAME=edx-jwt-cookie-header-payload
+BASE_URL=http://local.openedx.io:8080
+LOGIN_URL=http://local.openedx.io:8000/login
+LOGOUT_URL=http://local.openedx.io:8000/logout
+CSRF_TOKEN_API_PATH=/csrf/api/v1/token
diff --git a/example/public/index.html b/example/public/index.html
@@ -1,7 +1,7 @@
 <!doctype html>
 <html lang="en-us">
 <head>
-    <title>Example</title>
+    <title>Paragon Example</title>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 </head>

diff --git a/example/src/index.jsx b/example/src/index.jsx
@@ -1,31 +1,30 @@
-import React from 'react';
-import ReactDOM from 'react-dom';
+import { createRoot } from 'react-dom/client';
 import {
   AppProvider,
   ErrorPage,
-  PageRoute,
+  PageWrap,
 } from '@edx/frontend-platform/react';
 import { APP_INIT_ERROR, APP_READY, initialize } from '@edx/frontend-platform';
 import { subscribe } from '@edx/frontend-platform/pubSub';
 import MyComponent from './MyComponent';
 
 import './index.scss';
 
+const container = document.getElementById('root');
+const root = createRoot(container);
+
 subscribe(APP_READY, () => {
-  ReactDOM.render(
+  root.render(
     <AppProvider>
-      <PageRoute
-        exact
-        path="/"
-        component={MyComponent}
-      />
+      <PageWrap>
+        <MyComponent />
+      </PageWrap>
     </AppProvider>,
-    document.getElementById('root'),
   );
 });
 
 subscribe(APP_INIT_ERROR, (error) => {
-  ReactDOM.render(<ErrorPage message={error.message} />, document.getElementById('root'));
+  root.render(<ErrorPage message={error.message} />);
 });
 
 initialize({

diff --git a/package-lock.json b/package-lock.json
diff --git a/src/Breadcrumb/Breadcrumb.test.jsx → src/Breadcrumb/Breadcrumb.test.tsx b/src/Breadcrumb/Breadcrumb.test.jsx → src/Breadcrumb/Breadcrumb.test.tsx
@@ -95,4 +95,29 @@ describe('<Breadcrumb />', () => {
     expect(links.getAttribute('target')).toBe('_blank');
     expect(links.getAttribute('href')).toBe('/link-1');
   });
+
+  it('renders with a custom CSS class', () => {
+    render(<Breadcrumb {...baseProps} ariaLabel="Breadcrumbs" className="foobar" />);
+    const nav = screen.getByLabelText('Breadcrumbs');
+    expect(nav.classList).toContain('foobar');
+    expect(nav.classList).toContain('pgn__breadcrumb');
+    expect(nav.classList).toContain('pgn__breadcrumb-light');
+  });
+
+  it('can access data-xxxxx attributes on the links in clickHandler', async () => {
+    const user = userEvent.setup();
+    const clickHandler = jest.fn();
+    render(
+      <Breadcrumb
+        ariaLabel="Location"
+        links={[
+          { label: 'Link1', href: '/link1', 'data-parent-index': 17 },
+        ]}
+        clickHandler={({ currentTarget }) => clickHandler(currentTarget.dataset.parentIndex)}
+      />,
+    );
+    const link = screen.getByRole('link', { name: 'Link1' });
+    await user.click(link);
+    expect(clickHandler).toHaveBeenCalledWith('17');
+  });
 });
diff --git a/src/Breadcrumb/index.tsx b/src/Breadcrumb/index.tsx
@@ -19,7 +19,7 @@ interface BreadcrumbProps {
   spacer?: React.ReactElement;
   /** allows to add a custom function to be called `onClick` of a breadcrumb link.
    * The use case for this is for adding custom analytics to the component. */
-  clickHandler?: (event: React.MouseEvent, link: any) => void;
+  clickHandler?: (event: React.MouseEvent<HTMLAnchorElement>, link: any) => void;
   /** The `Breadcrumbs` style variant to use. */
   variant?: 'light' | 'dark';
   /** The `Breadcrumbs` mobile variant view. */
@@ -28,20 +28,21 @@ interface BreadcrumbProps {
    * [react-router's Link](https://reactrouter.com/en/main/components/link).
    */
   linkAs?: React.ElementType;
+  /** Optional class name(s) to append to the base `<nav>` element. */
+  className?: string;
 }
 
 function Breadcrumb({
-  links, activeLabel, spacer, clickHandler,
-  variant = 'light', isMobile = false, ariaLabel = 'breadcrumb', linkAs = 'a', ...props
+  links, activeLabel, spacer, clickHandler, className,
+  variant = 'light', isMobile = false, ariaLabel = 'breadcrumb', linkAs = 'a',
 }: BreadcrumbProps) {
   const linkCount = links.length;
   const displayLinks = isMobile ? [links[linkCount - 1]] : links;
 
   return (
     <nav
       aria-label={ariaLabel}
-      className={classNames('pgn__breadcrumb', `pgn__breadcrumb-${variant}`)}
-      {...props}
+      className={classNames('pgn__breadcrumb', `pgn__breadcrumb-${variant}`, className)}
     >
       <ol className={classNames('list-inline', { 'is-mobile': isMobile })}>
         {displayLinks.map((link, i) => (