npm i auth0-helpers

Helper functions for auth0-js.

Keeps your accessToken up to date by calling checkSession() for you.

Usage

On startup:

import auth0 from 'auth0-js'
import { initAuthHelpers } from 'auth0-helpers'

const client = new auth0.WebAuth({
  domain: 'foo.auth0.com',
  clientID: 'bar',
  responseType: 'token',
  audience: 'https://app.com',
  scope: 'openid profile myscope'
})

initAuthHelpers({
  client,
  usePopup: true,
  authOptions: {
    connection: 'github',
    owp: true,
    popupOptions: { height: 623 }
  },
  onError: console.error,
  checkSessionOptions: {
    redirect_uri: window.location.origin,
    timeout: 5 * 1000
  },
  returnToAfterLogout: 'https://app.com/login' // defaults to window.location.origin
})

Later:

import { login, logout, getAuthToken } from 'auth0-js'

login({
  onCompleted: (error, accessToken) => ...
})

logout()

// when making API requests:
const token = await getAuthToken({
  doLoginIfTokenExpired: true
})
if (token) {
  headers.authorization = `Bearer ${token}`
}

getAuthToken returns a Promise. It resolves immediately if the latest token isn't expired. If it is expired, it tries checkSession() to get a new token. If it can't and doLoginIfTokenExpired is true, then it does an auth call (client.authorize, or client.popup.authorize if you set usePopup to true). If there is no token (because logout() has been called, or login() has never been called in this browser, or localStorage has been cleared), it returns null.

A logout() function that doesn't cause a page reload has not yet been implemented.

If you have questions or would like something to change, check out the code—it's short!

The token and expiration are stored in localStorage under 'auth.accessToken' and 'auth.expiration'.

Auth0 setup

• Create an application (https://manage.auth0.com/#/applications)
  • Under Connections, enable one. (If eg Google, then you'll use 'google-oauth2' for authOptions.connection.)
  • Under Settings:
    • Fill in "Allowed Logout URLs" and "Allowed Origins (CORS)" (eg with http://localhost:3000)
    • Copy Domain and Client ID for use with new auth0.WebAuth
• Create an API (https://manage.auth0.com/#/apis)
  • Copy identifier (eg api.myapp.com) to use as audience with new auth0.WebAuth
  • Under Settings, we recommend setting the "Token Expiration For Browser Flows" to 86400 seconds (24 hours, the max) so that checkSession() has to be called less frequently. We also recommend setting SSO Cookie Timeout (https://manage.auth0.com/#/tenant/advanced) to 43200 minutes (30 days, the max). Then checkSession() will work for min(3 days since the last login or checkSession, 30 days).