intermediate#next.js#auth0#authentication
Implementing Authentication with Next.js and Auth0
Learn how to implement authentication in a Next.js application using Auth0.
Introduction to Authentication with Auth0
Authentication is a crucial aspect of any web application, and Next.js provides a robust framework for implementing authentication using various providers, including Auth0.
Step 1: Create a New Next.js Project
To start, create a new Next.js project using npx create-next-app my-auth.
npx create-next-app my-auth
cd my-auth
Step 2: Install Required Dependencies
Install the required dependencies, including @auth0/auth0-js.
npm install @auth0/auth0-js
Step 3: Configure Auth0
Configure Auth0 by creating a new Auth0 account and setting up a new application.
// pages/api/auth.js
import { handleAuth } from '@auth0/auth0-js';
const domain = 'your-auth0-domain.com';
const clientId = 'your-client-id';
const audience = 'https://your-auth0-domain.com/api/v2/';
const scope = 'openid profile email';
const handleLogin = async (req, res) => {
try {
const { state, code } = req.query;
const token = await handleAuth(code, clientId, domain, audience, scope);
res.json(token);
} catch (error) {
console.error(error);
res.status(500).json({ message: 'Error logging in' });
}
};
export default handleLogin;
Step 4: Implement Login and Logout
Implement login and logout functionality using the Auth0 API.
// pages/index.js
import { useState, useEffect } from 'react';
import { login, logout } from '../api/auth';
const Home = () => {
const [user, setUser] = useState(null);
const handleLogin = async () => {
const token = await login();
setUser(token);
};
const handleLogout = async () => {
await logout();
setUser(null);
};
return (
<div>
{user ? (
<button onClick={handleLogout}>Logout</button>
) : (
<button onClick={handleLogin}>Login</button>
)}
</div>
);
};
export default Home;
Conclusion
In this tutorial, you learned how to implement authentication in a Next.js application using Auth0.