How to validate email format in Supabase auth?

 

Step 1: Create a New Project in Supabase

 

• Head over to the Supabase website and log in or create an account.
• Once logged in, create a new project by selecting "New Project".
• Fill in the required details like the project name, organization, database password, etc., then click "Create New Project".

 

Step 2: Configure the Auth Settings

 

• Navigate to the "Authentication" tab on the left-hand menu of your Supabase dashboard.
• In the "Settings" tab, scroll to "Email Auth" and ensure it is enabled.
• Configure any additional settings as needed, such as email verification.

 

Step 3: Set Up Environment for Your Project

 

• Ensure you have Node.js installed on your machine.

• Create a new directory for your project and initialize it using npm:

  ```shell
  mkdir my-supabase-app
  cd my-supabase-app
  npm init -y
  ```

• Install the necessary Supabase client library:

  ```shell
  npm install @supabase/supabase-js
  ```

 

Step 4: Initialize Supabase Client

 

• Create a new file in your project directory, such as supabaseClient.js.

• Initialize the Supabase client with your API URL and Key from your Supabase dashboard:

  
  import { createClient } from '@supabase/supabase-js';
  
  const supabaseUrl = 'https://your-project-ref.supabase.co';
  const supabaseAnonKey = 'your-anonymous-public-api-key';
  
  export const supabase = createClient(supabaseUrl, supabaseAnonKey);
  

 

Step 5: Implement Email Format Validation

 

• Create a new JavaScript file, for example, validateEmail.js.

• Write a function to validate email format before passing it to Supabase:

  
  function validateEmail(email) {
      const emailRegex = /^[^\s@]+@[^\s@]+.[^\s@]+$/;
      return emailRegex.test(email);
  }
  
  // Example usage
  const email = '[email protected]';
  if (validateEmail(email)) {
      console.log('Email is valid');
  } else {
      console.log('Email is invalid');
  }
  

 

Step 6: Integrate with Supabase Auth Function

 

• Combine email validation with user sign-up functionality:

• Modify your script to integrate Supabase authentication. In your app.js file:

  
  import { supabase } from './supabaseClient';
  import { validateEmail } from './validateEmail';
  
  async function signUpUser(email, password) {
      if (!validateEmail(email)) {
          console.log('Invalid email format.');
          return;
      }
  
      const { user, error } = await supabase.auth.signUp({
          email: email,
          password: password,
      });
  
      if (error) {
          console.error('Error signing up:', error.message);
      } else {
          console.log('User signed up:', user);
      }
  }
  
  // Example usage
  signUpUser('[email protected]', 'securePassword123');
  

 

Step 7: Test Your Implementation

 

• Run your application to test email validation and user sign-up:

  ```shell
  node app.js
  ```

• Ensure that your application correctly validates email formats and signs up users through Supabase Auth with proper error handling.