Auth0 SDK for Single Page Applications using Authorization Code Grant Flow with PKCE


Keywords
auth0, login, Authorization Code Grant Flow, PKCE, Single Page Application authentication, SPA authentication, auth0-js, dx-sdk, oauth2, openid-connect, spa
License
MIT
Install
npm install @auth0/auth0-spa-js@1.13.5

Documentation

@auth0/auth0-spa-js

Auth0 SDK for Single Page Applications using Authorization Code Grant Flow with PKCE.

CircleCI License

Table of Contents

Documentation

Installation

From the CDN:

<script src="https://cdn.auth0.com/js/auth0-spa-js/1.7/auth0-spa-js.production.js"></script>

Using npm:

npm install @auth0/auth0-spa-js

Using yarn:

yarn add @auth0/auth0-spa-js

Getting Started

Creating the client

Create an Auth0Client instance before rendering or initializing your application. You should only have one instance of the client.

import createAuth0Client from '@auth0/auth0-spa-js';

//with async/await
const auth0 = await createAuth0Client({
  domain: '<AUTH0_DOMAIN>',
  client_id: '<AUTH0_CLIENT_ID>',
  redirect_uri: '<MY_CALLBACK_URL>',
});

//with promises
createAuth0Client({
  domain: '<AUTH0_DOMAIN>',
  client_id: '<AUTH0_CLIENT_ID>',
  redirect_uri: '<MY_CALLBACK_URL>',
}).then((auth0) => {
  //...
});

//or, you can just instantiate the client on it's own
import { Auth0Client } from '@auth0/auth0-spa-js';

const auth0 = new Auth0Client({
  domain: '<AUTH0_DOMAIN>',
  client_id: '<AUTH0_CLIENT_ID>',
  redirect_uri: '<MY_CALLBACK_URL>',
});

//if you do this, you'll need to check the session yourself
try {
  await getTokenSilently();
} catch (error) {
  if (error.error !== 'login_required') {
    throw error;
  }
}

1 - Login

<button id="login">Click to Login</button>
//with async/await

//redirect to the Universal Login Page
document.getElementById('login').addEventListener('click', async () => {
  await auth0.loginWithRedirect();
});

//in your callback route (<MY_CALLBACK_URL>)
window.addEventListener('load', async () => {
  const redirectResult = await auth0.handleRedirectCallback();
  //logged in. you can get the user profile like this:
  const user = await auth0.getUser();
  console.log(user);
});

//with promises

//redirect to the Universal Login Page
document.getElementById('login').addEventListener('click', () => {
  auth0.loginWithRedirect().catch(() => {
    //error while redirecting the user
  });
});

//in your callback route (<MY_CALLBACK_URL>)
window.addEventListener('load', () => {
  auth0.handleRedirectCallback().then((redirectResult) => {
    //logged in. you can get the user profile like this:
    auth0.getUser().then((user) => {
      console.log(user);
    });
  });
});

2 - Calling an API

<button id="call-api">Call an API</button>
//with async/await
document.getElementById('call-api').addEventListener('click', async () => {
  const accessToken = await auth0.getTokenSilently();
  const result = await fetch('https://myapi.com', {
    method: 'GET',
    headers: {
      Authorization: `Bearer ${accessToken}`,
    },
  });
  const data = await result.json();
  console.log(data);
});

//with promises
document.getElementById('call-api').addEventListener('click', () => {
  auth0
    .getTokenSilently()
    .then((accessToken) =>
      fetch('https://myapi.com', {
        method: 'GET',
        headers: {
          Authorization: `Bearer ${accessToken}`,
        },
      })
    )
    .then((result) => result.json())
    .then((data) => {
      console.log(data);
    });
});

3 - Logout

<button id="logout">Logout</button>
import createAuth0Client from '@auth0/auth0-spa-js';

document.getElementById('logout').addEventListener('click', () => {
  auth0.logout();
});

Data caching options

The SDK can be configured to cache ID tokens and access tokens either in memory or in local storage. The default is in memory. This setting can be controlled using the cacheLocation option when creating the Auth0 client.

To use the in-memory mode, no additional options need are required as this is the default setting. To configure the SDK to cache data using local storage, set cacheLocation as follows:

await createAuth0Client({
  domain: '<AUTH0_DOMAIN>',
  client_id: '<AUTH0_CLIENT_ID>',
  redirect_uri: '<MY_CALLBACK_URL>',
  cacheLocation: 'localstorage', // valid values are: 'memory' or 'localstorage'
});

Important: This feature will allow the caching of data such as ID and access tokens to be stored in local storage. Exercising this option changes the security characteristics of your application and should not be used lightly. Extra care should be taken to mitigate against XSS attacks and minimize the risk of tokens being stolen from local storage.

Refresh Tokens

Refresh tokens can be used to request new access tokens. Read more about how our refresh tokens work for browser-based applications to help you decide whether or not you need to use them.

To enable the use of refresh tokens, set the useRefreshTokens option to true:

await createAuth0Client({
  domain: '<AUTH0_DOMAIN>',
  client_id: '<AUTH0_CLIENT_ID>',
  redirect_uri: '<MY_CALLBACK_URL>',
  useRefreshTokens: true,
});

Using this setting will cause the SDK to automatically send the offline_access scope to the authorization server. Refresh tokens will then be used to exchange for new access tokens instead of using a hidden iframe, and calls the /oauth/token endpoint directly. This means that the SDK does not rely on third-party cookies when using refresh tokens.

Note This configuration option requires Rotating Refresh Tokens to be enabled for your Auth0 Tenant.

Contributing

We appreciate feedback and contribution to this repo! Before you get started, please see the following:

Support + Feedback

For support or to provide feedback, please raise an issue on our issue tracker.

Frequently Asked Questions

For a rundown of common issues you might encounter when using the SDK, please check out the FAQ.

Vulnerability Reporting

Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.

What is Auth0?

Auth0 helps you to easily:

  • implement authentication with multiple identity providers, including social (e.g., Google, Facebook, Microsoft, LinkedIn, GitHub, Twitter, etc), or enterprise (e.g., Windows Azure AD, Google Apps, Active Directory, ADFS, SAML, etc.)
  • log in users with username/password databases, passwordless, or multi-factor authentication
  • link multiple user accounts together
  • generate signed JSON Web Tokens to authorize your API calls and flow the user identity securely
  • access demographics and analytics detailing how, when, and where users are logging in
  • enrich user profiles from other data sources using customizable JavaScript rules

Why Auth0?

License

This project is licensed under the MIT license. See the LICENSE file for more info.