This guide will seamlessly walk you through integrating Frontegg's login box into your React application, with robust functionalities including Sign In, Sign Up, and Single Sign-On (SSO). Streamline your authentication process with just a few lines of code, leveraging the power of redirects, OpenID Connect, and OAuth2.

⚡️ The code in the sample below is available in our Frontegg Samples repository in GitHub ⚡️

⚡ Before you start: ⚡

📘
Getting your Frontegg subdomain and clientId
Frontegg creates a unique subdomain and client id for every environment created on the account. In order to retrieve the clientId subdomain that will act as the baseUrl in the integration, navigate to your workspace 'Settings' menu, 'Domains' and copy the Frontegg domain and clientId.
You will need them for this guide.

Step 1

Create a Vite.js App

📘
If you have an existing app, skip this step.

To create a new app, use the following script.

$ npm create vite@latest app-with-frontegg --template react
cd app-with-frontegg

### STEP 2: Install Frontegg React.JS library

Run the following command to install the Frontegg React.JS library.

npm install @frontegg/react react-router-dom

yarn add @frontegg/react [email protected]

STEP 3: Configure

Wrap your root component with FronteggProvider.

import React from 'react';
import ReactDOM from 'react-dom'; // For react 17
// For react 18: import ReactDOM from 'react-dom/client';
import App from './App';
import './index.css';

import { FronteggProvider } from '@frontegg/react';

const contextOptions = {
  baseUrl: 'https://[YOUR_SUBDOMAIN].frontegg.com',
  clientId: '[YOUR-CLIENT-ID]'
};


const authOptions = {
 // keepSessionAlive: true // Uncomment this in order to maintain the session alive
};

// For react 18: 
// const root = ReactDOM.createRoot(document.getElementById('root'));
// root.render(
ReactDOM.render(
    <FronteggProvider contextOptions={contextOptions} hostedLoginBox={true} authOptions={authOptions}>
        <App />
    </FronteggProvider>,
    document.getElementById('root')
);

Under the hosted login configuration, add http://localhost:3000/oauth/callback as the allowed redirectUrl

🚧
Configure Each Environment
Configure the hosted login for each environment separately.

STEP 4: Redirect to login

Using the Frontegg useAuth hook, you can determine whether a user is authenticated or not.
If the user is not authenticated, you can redirect the user to login via the useLoginWithRedirect hook as shown below.

import './App.css';
// import { useEffect } from 'react';
import { useAuth, useLoginWithRedirect, ContextHolder } from "@frontegg/react";

function App() {
  const { user, isAuthenticated } = useAuth();
  const loginWithRedirect = useLoginWithRedirect();

  // Uncomment this to redirect to login automatically
  // useEffect(() => {
  //   if (!isAuthenticated) {
  //     loginWithRedirect();
  //   }
  // }, [isAuthenticated, loginWithRedirect]);
  
  const logout = () => {
   const baseUrl = ContextHolder.getContext().baseUrl;
   window.location.href = `${baseUrl}/oauth/logout?post_logout_redirect_uri=${window.location}`;
  };
  
  return (
    <div className="App">
      { isAuthenticated ? (
        <div>
          <div>
            <img src={user?.profilePictureUrl || undefined} alt={user?.name}/>
          </div>
          <div>
            <span>Logged in as: {user?.name}</span>
          </div>
          <div>
            <button onClick={() => alert(user?.accessToken)}>What is my access token?</button>
          </div>
          <div>
            <button onClick={() => logout()}>Click to logout</button>
          </div>
        </div>
      ) : (
        <div>
          <button onClick={() => loginWithRedirect()}>Click me to login</button>
        </div>
      )}
    </div>
  );
}

export default App;

Great, Frontegg is now integrated with your app!

Try it now!

Run your app and click on the Click me to login button.