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Azure AD B2C is a cost effective identity provider covering social and enterprise logins but it can be awekward to integrate with - its documentation is currently not great and using it involves rooting around across multiple samples, the ADAL library, and the MSAL library.

That being the case I've focused this package on B2C although with minor changes it could be used more broadly. MSAL itself, which this library wraps, is rather generic but B2C has some specific requirements and I think half of the problem with the documentation is that you end up drifting across B2C and straight AD. I wanted to make things simpler for B2C.

Hopefully this will help people writing React apps. It makes use of MSAL underneath and the core of it (other than protecting routes) will probably work with other frameworks too but I use React at the moment. As it's an SPA my assumption in the library and documentation below is that you ultimately want to get an access token that you can use to call remote APIs. See this Azure AD B2C post here for details on how to set this up on the B2C side.

PRs welcome!


If you are using npm:

npm install react-azure-adb2c --save

Or if you are using yarn:

yarn add react-azure-adb2c

Initializing the Library

You'll first need to load the module and pass some configuration to the library. Normally this would go in your index.js file:

import authentication from 'react-azure-adb2c';
    // optional, will default to this
    instance: '', 
    // your B2C tenant
    tenant: '',
    // the policy to use to sign in, can also be a sign up or sign in policy
    signInPolicy: 'mysigninpolicy',
    // the policy to use for password reset
    resetPolicy: 'mypasswordresetpolicy',
    // the the B2C application you want to authenticate with (that's just a random GUID - get yours from the portal)
    applicationId: '75ee2b43-ad2c-4366-9b8f-84b7d19d776e',
    // where MSAL will store state - localStorage or sessionStorage
    cacheLocation: 'sessionStorage',
    // the scopes you want included in the access token
    scopes: [''],
    // optional, the redirect URI - if not specified MSAL will pick up the location from window.href
    redirectUri: 'http://localhost:3000',
    // optional, the URI to redirect to after logout
    postLogoutRedirectUri: ''

Authenticating When The App Starts

If you want to set things up so that a user is authenticated as soon as they hit your app (for example if you've got a link to an app from a landing page) then, in index.js, wrap the lines of code that launch the React app with the function: => {
  ReactDOM.render(<App />, document.getElementById('root'));

Triggering Authentication Based on Components Mounting (and routing)

If you want to set things up so that a user is authenticated as they visit a part of the application that requires authentication then the appropriate components can be wrapped inside higher order components that will handle the authentication process. This is done using the authentication.required function, normally in conjunction with a router. The example below shows this using the popular react-router:

import React, { Component } from 'react';
import authentication from 'react-azure-adb2c'
import { BrowserRouter as Router, Route, Switch } from "react-router-dom";
import HomePage from './Homepage'
import MembersArea from './MembersArea'

class App extends Component {
  render() {
    return (
      <Router basename={process.env.PUBLIC_URL}>
          <Route exact path="/" component={HomePage} />
          <Route exact path="/membersArea" component={authentication.required(MembersArea)}>

Getting the Access Token

Simply call the method getAccessToken:

import authentication from 'react-azure-adb2c'

// ...

const token = authentication.getAccessToken();

Signing Out

To sign out:

import authentication from 'react-azure-adb2c'

// ...



To build this I made use of the B2C site, the MSAL library docs, the react-adal source and this React MSAL sample. Thanks!

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