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auth0-react-native

Use when adding authentication to React Native or Expo mobile apps (iOS/Android) with biometric support - integrates react-native-auth0 SDK with native deep linking

Install with Tessl CLI

npx tessl i github:auth0/agent-skills --skill auth0-react-native
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Auth0 React Native Integration

Add authentication to React Native and Expo mobile applications using react-native-auth0.

Prerequisites

  • React Native or Expo application
  • Auth0 account and application configured as Native type
  • If you don't have Auth0 set up yet, use the auth0-quickstart skill first

When NOT to Use

  • React web applications - Use auth0-react skill for SPAs (Vite/CRA)
  • React Server Components - Use auth0-nextjs for Next.js applications
  • Non-React native apps - Use platform-specific SDKs (Swift for iOS, Kotlin for Android)
  • Backend APIs - Use JWT validation libraries for your server language

Quick Start Workflow

1. Install SDK

Expo:

npx expo install react-native-auth0

React Native CLI:

npm install react-native-auth0
npx pod-install  # iOS only

2. Configure Environment

For automated setup with Auth0 CLI, see Setup Guide for complete scripts.

For manual setup:

Create .env:

AUTH0_DOMAIN=your-tenant.auth0.com
AUTH0_CLIENT_ID=your-client-id

3. Configure Native Platforms

iOS - Update ios/{YourApp}/Info.plist:

<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleTypeRole</key>
    <string>None</string>
    <key>CFBundleURLName</key>
    <string>auth0</string>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>$(PRODUCT_BUNDLE_IDENTIFIER).auth0</string>
    </array>
  </dict>
</array>

Android - Update android/app/src/main/AndroidManifest.xml:

<activity
    android:name="com.auth0.android.provider.RedirectActivity"
    android:exported="true">
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data
            android:host="YOUR_AUTH0_DOMAIN"
            android:pathPrefix="/android/${applicationId}/callback"
            android:scheme="${applicationId}" />
    </intent-filter>
</activity>

Expo - Update app.json:

{
  "expo": {
    "scheme": "your-app-scheme",
    "ios": {
      "bundleIdentifier": "com.yourcompany.yourapp"
    },
    "android": {
      "package": "com.yourcompany.yourapp"
    }
  }
}

4. Add Authentication with Auth0Provider

Wrap your app with Auth0Provider:

import React from 'react';
import { Auth0Provider } from 'react-native-auth0';
import App from './App';

export default function Root() {
  return (
    <Auth0Provider
      domain={process.env.AUTH0_DOMAIN}
      clientId={process.env.AUTH0_CLIENT_ID}
    >
      <App />
    </Auth0Provider>
  );
}

5. Use the useAuth0 Hook

import React from 'react';
import { View, Button, Text, ActivityIndicator } from 'react-native';
import { useAuth0 } from 'react-native-auth0';

export default function App() {
  const { user, authorize, clearSession, isLoading } = useAuth0();

  const login = async () => {
    try {
      await authorize({
        scope: 'openid profile email'
      });
    } catch (error) {
      console.error('Login error:', error);
    }
  };

  const logout = async () => {
    try {
      await clearSession();
    } catch (error) {
      console.error('Logout error:', error);
    }
  };

  if (isLoading) {
    return <ActivityIndicator />;
  }

  return (
    <View>
      {user ? (
        <>
          <Text>Welcome, {user.name}!</Text>
          <Text>{user.email}</Text>
          <Button title="Logout" onPress={logout} />
        </>
      ) : (
        <Button title="Login" onPress={login} />
      )}
    </View>
  );
}

6. Test Authentication

Expo:

npx expo start

React Native:

npx react-native run-ios
# or
npx react-native run-android

Detailed Documentation

  • Setup Guide - Automated setup, native configuration, deep linking
  • Patterns Guide - Secure storage, biometric auth, token refresh
  • API Reference - Complete SDK API, methods, configuration options

Common Mistakes

MistakeFix
Forgot to wrap app with Auth0ProviderAll components using useAuth0() must be children of Auth0Provider
Forgot to configure deep linkingAdd URL scheme to iOS Info.plist and Android AndroidManifest.xml (see Step 3)
Callback URL mismatchEnsure callback URL in Auth0 Dashboard matches your app's URL scheme (e.g., com.yourapp.auth0://YOUR_DOMAIN/ios/com.yourapp/callback)
iOS build fails after installRun npx pod-install to link native dependencies
App created as SPA type in Auth0Must be Native application type for mobile apps
Not handling auth errorsWrap authorize/clearSession calls in try-catch blocks
Deep link not working on AndroidVerify android:exported="true" is set on RedirectActivity

Related Skills

  • auth0-quickstart - Basic Auth0 setup
  • auth0-migration - Migrate from another auth provider
  • auth0-mfa - Add Multi-Factor Authentication

Quick Reference

Core Hook API:

  • useAuth0() - Main hook for authentication
  • authorize() - Initiate login
  • clearSession() - Logout
  • user - User profile object
  • getCredentials() - Get tokens for API calls
  • isLoading - Loading state

Common Use Cases:

  • Login/Logout → See Step 5 above
  • Secure token storage → Automatic with Auth0Provider
  • Biometric authentication → Patterns Guide
  • API calls with tokens → Patterns Guide
  • Token refresh → Automatic with getCredentials()

References

Repository
auth0/agent-skills
Commit

8a541a4

Last updated
Created

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