Supabase Authentication in React Next.js

Supabase Authentication in React Next.js

In this tutorial, we will explore how to implement Supabase authentication in a React Next.js application. Supabase is an open-source alternative to Firebase that provides a suite of tools for building scalable and secure applications. One of the key features of Supabase is its authentication system, which allows users to sign up, log in, and manage their account information.

We will start by setting up a new Next.js project and integrating Supabase into our application. We will then create a login and registration form using the Supabase authentication API and implement protected routes that require users to be authenticated before accessing certain pages. By the end of this tutorial, you will have a fully functional authentication system that can be easily integrated into any React Next.js application.

What is Supabase?

Supabase Authentication is a secure and scalable authentication system that allows users to sign up, log in, and manage their account information. It is a part of the Supabase suite of tools, which provides an open-source alternative to Firebase. Supabase Authentication uses industry-standard security protocols to ensure that user data is protected and secure.

With Supabase Authentication, developers can easily add authentication to their applications without having to build their own authentication system from scratch. It provides a simple API that can be integrated into any application, making it easy to manage user accounts and access control. Supabase Authentication also provides features such as email verification, password reset, and social login, making it a comprehensive solution for authentication needs.

Why use Supabase for Authentication in React Next.js application?

Supabase Authentication is a great choice for developers who want a secure and scalable authentication system for their applications. One of the main benefits of using Supabase Authentication is that it is open-source and free to use, making it an affordable option for small businesses and startups. Additionally, Supabase Authentication is easy to integrate into any application, with a simple API that can be used with any programming language.

Another benefit of using Supabase Authentication is that it provides a comprehensive set of features for managing user accounts and access control. This includes email verification, password reset, and social login, making it a complete solution for authentication needs. Supabase Authentication also uses industry-standard security protocols to ensure that user data is protected and secure.

• Open-source and free to use
• Easy to integrate into any application
• Comprehensive set of features for managing user accounts and access control
• Email verification, password reset, and social login
• Uses industry-standard security protocols to ensure user data is protected and secure

Overall, Supabase Authentication is a reliable and secure authentication system that provides a range of features for managing user accounts and access control. Its open-source nature and ease of integration make it an attractive option for developers who want a cost-effective and scalable solution for their authentication needs.

Prerequisites

To complete the "Supabase Authentication in React Next.js" tutorial, you will need to have the following prerequisites:

• Basic knowledge of React and Next.js
• Node.js and npm installed on your machine
• A Supabase account and project set up
• A basic understanding of authentication concepts such as sign up, log in, and access control
• Familiarity with JavaScript and JSX syntax
• A code editor such as Visual Studio Code or Sublime Text

It is recommended that you have a basic understanding of React and Next.js before starting this tutorial, as we will be building a React Next.js application that integrates with Supabase Authentication. Additionally, you will need to have a Supabase account and project set up to use the Supabase Authentication API. Finally, a basic understanding of authentication concepts and JavaScript syntax will be helpful in understanding the code examples provided in the tutorial.

React Next.js Supabase step by step setup and configuration

To integrate Supabase into a React Next.js project, we first need to install the Supabase client library. We can do this by running the following command in our project directory:

npm install @supabase/supabase-js

Once we have installed the Supabase client library, we can create a new instance of the Supabase client in our application. We will need to provide our Supabase project URL and public API key to create the client instance. We can do this by creating a new file called supabase.js in our project directory and adding the following code:

import { createClient } from '@supabase/supabase-js'

const supabaseUrl = 'https://your-project-url.supabase.co'
const supabaseKey = 'your-public-api-key'

export const supabase = createClient(supabaseUrl, supabaseKey)

In this code block, we import the createClient function from the Supabase client library and create a new instance of the client using our Supabase project URL and public API key. We then export this instance as supabase so that we can use it throughout our application.

With our Supabase client instance set up, we can now use the Supabase Authentication API to handle user authentication in our application. We can create a login form that uses the signIn function from the Supabase client to authenticate the user. Here is an example of what the login form might look like:

import { useState } from 'react'
import { supabase } from '../supabase'

export default function Login() {
  const [email, setEmail] = useState('')
  const [password, setPassword] = useState('')

  const handleLogin = async (event) => {
    event.preventDefault()
    const { error } = await supabase.auth.signIn({
      email,
      password,
    })
    if (error) {
      console.log(error)
    }
  }

  return (
    <form onSubmit={handleLogin}>
      <input
        type="email"
        placeholder="Email"
        value={email}
        onChange={(event) => setEmail(event.target.value)}
      />
      <input
        type="password"
        placeholder="Password"
        value={password}
        onChange={(event) => setPassword(event.target.value)}
      />
      <button type="submit">Log In</button>
    </form>
  )
}

In this code block, we import the useState hook from React and our supabase client instance. We then create a login form that uses the signIn function from the Supabase client to authenticate the user. When the user submits the form, we call the signIn function with the user's email and password. If there is an error, we log it to the console.

Finally, we can create protected routes in our application that require the user to be authenticated before accessing certain pages. We can do this by creating a higher-order component that checks if the user is authenticated and redirects them to the login page if they are not. Here is an example of what the protected route component might look like:

import { useRouter } from 'next/router'
import { useEffect } from 'react'
import { supabase } from '../supabase'

export default function ProtectedRoute(Component) {
  return function WithAuth(props) {
    const router = useRouter()

    useEffect(() => {
      const { user } = supabase.auth.session()
      if (!user) {
        router.push('/login')
      }
    }, [])

    return <Component {...props} />
  }
}

In this code block, we import the useRouter and useEffect hooks from Next.js and our supabase client instance. We then create a higher-order component called ProtectedRoute that takes a component as an argument. Inside the WithAuth component, we check if the user is authenticated using the session function from the Supabase client. If the user is not authenticated, we redirect them to the login page using the router object from Next.js. Finally, we return the original component with any props that were passed in.

Supabase configuration options in React Next.js

Here are the Supabase configuration options for React Next.js integration:

• supabaseUrl: The URL of your Supabase project.
• supabaseKey: The public API key for your Supabase project.
• autoRefreshToken: Whether to automatically refresh the user's authentication token.
• persistSession: Whether to persist the user's session in local storage.
• detectSessionInUrl: Whether to detect the user's session in the URL.
• routes: Custom routes for authentication endpoints.
• redirectTo: The URL to redirect the user to after authentication.

supabaseUrl and supabaseKey are required configuration options that provide the Supabase client library with the necessary information to connect to your Supabase project. autoRefreshToken and persistSession are optional configuration options that control how the Supabase client library handles user authentication.

detectSessionInUrl is an optional configuration option that allows the Supabase client library to detect the user's session in the URL. This can be useful for server-side rendering in Next.js applications.

routes is an optional configuration option that allows you to customize the authentication endpoints used by the Supabase client library. This can be useful if you want to use your own authentication endpoints instead of the default Supabase endpoints.

redirectTo is an optional configuration option that allows you to specify the URL to redirect the user to after authentication. This can be useful if you want to redirect the user to a specific page after they log in or sign up.

Conclusion

In conclusion, we have learned how to integrate Supabase Authentication into a React Next.js application. We started by setting up a new Next.js project and installing the Supabase client library. We then created a new instance of the Supabase client and used it to implement a login form and protected routes that require authentication.

Supabase Authentication provides a comprehensive set of features for managing user accounts and access control, including email verification, password reset, and social login. It is an open-source and free-to-use alternative to Firebase that is easy to integrate into any application. With Supabase Authentication, developers can easily add authentication to their applications without having to build their own authentication system from scratch.

Overall, Supabase Authentication is a reliable and secure authentication system that provides a range of features for managing user accounts and access control. Its open-source nature and ease of integration make it an attractive option for developers who want a cost-effective and scalable solution for their authentication needs. By following this tutorial, you should now have a good understanding of how to integrate Supabase Authentication into your own React Next.js applications.