Auth0 ACUL React SDK

Developers using Auth0’s Universal Login can use this React SDK to customize screens like login, signup, or reset password. It provides hooks, context, and utilities to build flexible, type-safe experiences that match your brand and deliver a seamless user experience.

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📚 Documentation

• Quickstart - our guide for setting up the SDK on your app.
• Guides - more guides for common use cases
• Examples - code snippets for different customization use cases.

🚀 Getting started

Prerequisites

Before starting, ensure that you have the following setup:

1. Custom Domain: Ensure that a custom domain is configured for your Auth0 tenant.
2. Screen Configuration: Set up the required authentication screens within your Auth0 flow.
   For detailed steps, refer to the Configure ACUL Screens.

Installation

npm install @auth0/auth0-acul-react
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Peer dependency:

npm install react
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Importing the SDK

The SDK supports partial imports for each screen, allowing you to include only the code you need for your specific use case. This helps keep your bundle size small and improves performance.

Also, you can use a root import to load all screens from a single bundle if your app requires it.

Partial Imports

Each screen has its own set of hooks and methods. You can import only what you need for the screen you're building.

The following example shows how to import and use SDK to build login-id screen.

import { 
  // Context hooks
  useUser,
  useTenant,
  useBranding,
  useClient,
  useOrganization,
  usePrompt,
  useScreen,
  useTenant,
  useTransaction,
  useUser,
  useUntrustedData,
  // Common hooks
  useErrors,
  useTexts,
  // Utility hooks
  useUsernameValidation,
  usePasswordValidation,
  useLoginIdentifiers,
  // Submit methods
  login,
  passkeyLogin,
  federatedLogin,
} from '@auth0/auth0-acul-react/login-id';
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Root Imports

The SDK also supports a root import, which lets you load all screens from a single bundle. This is useful if your app dynamically renders different screens at runtime based on the current Auth0 flow, for example, when you want one unified build that can handle all possible screens.

However, root imports aren’t ideal for most projects since they can increase bundle size. If you only need specific screens, use partial imports instead for better performance.

import {
  // Common hooks
  useCurrentScreen,
  useAuth0Themes,
  useErrors,

  // Screen-specific hooks for multiple screens
  useLoginId,
  useSignupId,
  useResetPassword
} from '@auth0/auth0-acul-react';
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Types / Interfaces

Typescript types and interfaces can be imported from @auth0/auth0-acul-react/types for type safety and better DX.

import type {
  Connection,
  CustomOptions,
  IdentifierType,
  Organizations,
  EnrolledDevice
  // ...other types
} from '@auth0/auth0-acul-react/types';
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Refer to our API Reference for the full list of available types and interfaces.

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💻 API Reference

Screens

No.	Prompt	Screen Name	Documentation Link
1	login	login	Link
2	login-id	login-id	Link
3	login-password	login-password	Link
4	signup-id	signup-id	Link
5	signup-password	signup-password	Link

Explore more screens...

No.	Prompt	Screen Name	Documentation Link
6	login-passwordless	login-passwordless-email-code	Link
7	login-passwordless	login-passwordless-sms-otp	Link
8	passkeys	passkey-enrollment	Link
9	passkeys	passkey-enrollment-local	Link
10	phone-identifier-enrollment	phone-identifier-enrollment	Link
11	phone-identifier-challenge	phone-identifier-challenge	Link
12	email-identifier-challenge	email-identifier-challenge	Link
13	captcha	interstitial-captcha	Link
14	reset-password	reset-password-email	Link
15	reset-password	reset-password-request	Link
16	reset-password	reset-password	Link
17	reset-password	reset-password-error	Link
18	reset-password	reset-password-success	Link
19	signup	signup	Link
20	mfa	mfa-detect-browser-capabilities	Link
21	mfa	mfa-enroll-result	Link
22	mfa	mfa-begin-enroll-options	Link
23	mfa	mfa-login-options	Link
24	mfa-push	mfa-push-enrollment-qr	Link
25	mfa-push	mfa-push-welcome	Link
26	mfa-push	mfa-push-challenge-push	Link
27	mfa-push	mfa-push-list	Link
28	mfa-sms	mfa-country-codes	Link
29	mfa-sms	mfa-sms-challenge	Link
30	mfa-sms	mfa-sms-enrollment	Link
31	mfa-sms	mfa-sms-list	Link
32	mfa-email	mfa-email-challenge	Link
33	mfa-email	mfa-email-list	Link
34	invitatino	accept-invitation	Link
35	organizations	organization-picker	Link
36	organizations	organization-selection	Link
37	reset-password	mfa-otp-challenge	Link
38	mfa-otp	mfa-otp-enrollment-code	Link
39	mfa-otp	mfa-otp-enrollment-qr	Link
40	reset-password	reset-password-mfa-email-challenge	Link
41	reset-password	reset-password-mfa-push-challenge-push	Link
42	reset-password	mfa-sms-challenge	Link
43	reset-password	reset-password-mfa-otp-challenge	Link
44	mfa-phone	mfa-phone-enrollment	Link
45	mfa-voice	mfa-voice-enrollment	Link
46	mfa-recovery-code	mfa-recovery-code-challenge	Link
47	device-flow	device-code-activation-allowed	Link
48	device-flow	device-code-activation-denied	Link
49	device-flow	device-code-activation	Link
50	reset-password	reset-password-mfa-recovery-code-challenge	Link
51	reset-password	reset-password-mfa-voice	Link
52	common	redeem-ticket	Link
53	device-flow	device-code-confirmation	Link
54	mfa-phone	mfa-phone-challenge	Link
55	mfa-voice	mfa-voice-challenge	Link
56	mfa-recovery-code	mfa-recovery-code-enrollment	Link
57	reset-password	reset-password-mfa-phone-challenge	Link
58	mfa-recovery-code	mfa-recovery-code-challenge-new-code	Link
59	logout	logout	Link
60	logout	logout-aborted	Link
61	logout	logout-complete	Link
62	email-verification	email-verification-result	Link
63	login-email-verification	login-email-verification	Link
64	mfa-webauthn	mfa-webauthn-platform-enrollment	Link
65	mfa-webauthn	mfa-webauthn-error	Link
66	mfa-webauthn	mfa-webauthn-roaming-enrollment	Link
67	mfa-webauthn	mfa-webauthn-roaming-challenge	Link
68	mfa-webauthn	mfa-webauthn-platform-challenge	Link
69	mfa-webauthn	mfa-webauthn-enrollment-success	Link
70	mfa-webauthn	mfa-webauthn-change-key-nickname	Link
71	mfa-webauthn	mfa-webauthn-not-available-error	Link
72	reset-password	reset-password-mfa-webauthn-platform-challenge	Link
73	reset-password	reset-password-mfa-webauthn-roaming-challenge	Link
74	consent	consent	Link
75	customized-consent	customized-consent	Link
76	email-otp-challenge	email-otp-challenge	Link

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Hooks

Context Hooks (Available in all screens)

• useUser() - Current user information
• useTenant() - Tenant configuration
• useClient() - Application client information
• useScreen() - Current screen data and configuration
• useTransaction() - Transaction state and methods
• useBranding() - Tenant branding and theme
• useOrganization() - Organization context (if applicable)
• usePrompt() - Current authentication prompt
• useUntrustedData() - Untrusted data from the authentication flow

Utility Hooks

Specialized hooks for form validation, polling, and identifier management:

Identifier Management

• useLoginIdentifiers() - Get available login identifier types (email, phone, username)
• useSignupIdentifiers() - Get available signup identifier types, each with its required status

Form Validation

• usePasswordValidation(password, rules) - Real-time password strength validation
• useUsernameValidation(username) - Username format and availability validation

MFA & Polling

• useMfaPolling(options) - Manage MFA push notification polling lifecycle
• useResend(options) - Handle resend operations with cooldown timers

Common Hooks

General-purpose hooks available across all screens:

Screen Management

• useCurrentScreen() - Get complete current screen context data
• useAuth0Themes() - Access tenant branding and theme configuration

Error Handling

• useErrors(options) - Comprehensive error management with categorization
  • Filter by error kind: 'validation', 'auth0', 'configuration'
  • Filter by field name for form-specific errors
  • Dismiss individual or all errors

Screen-Specific Action Methods

Each screen module exports methods for screen actions:

// Login ID Screen
import {
  loginMethod,
  continueWithFederatedLogin
} from '@auth0/auth0-acul-react/login-id';

// Password Screen
import {
  loginMethod,
  forgotPasswordMethod
} from '@auth0/auth0-acul-react/login-password';

// MFA Push Challenge
import {
  continueMethod,
  resendPushNotification,
  useMfaPolling
} from '@auth0/auth0-acul-react/mfa-push-challenge-push';
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Examples

• React Examples - Complete React component examples
• React Boilerplate - Full React application template

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💬 Feedback

Contributing

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

• Auth0's general contribution guidelines
• Auth0's code of conduct guidelines

Raise an issue

To provide feedback or report a bug, please raise an issue on our issue tracker.

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.

Legal

Early Access. This SDK and its associated product are made available only in Early Access ("EA") format and are governed by the Free Trial terms of the Okta Master Subscription Agreement. If Okta elects to make a version of this SDK and its associated product Generally Available ("GA"), such GA version may have different pricing, product and feature configurations, and use of the GA product and SDK will be subject to the standard terms of the Agreement (or other such titled written or electronic agreement addressing the same subject matter) between Okta and Customer."

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Auth0 is an easy to implement, adaptable authentication and authorization platform. To learn more checkout Why Auth0?

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