How to integrate user authentication in a SolidJS app using Supabase

To integrate user authentication in a SolidJS app using Supabase, you can follow these steps:

Prerequisites:

• Supabase Account: Sign up for a Supabase account and create a new project.
• SolidJS Project: Have a SolidJS project set up and ready to work with.

Integration Steps:

1. Install Supabase Client:

   Install the Supabase JavaScript client in your SolidJS project.

                   
                       npm install @supabase/supabase-js
                   
               

2. Initialize Supabase:

   Initialize Supabase by using your Supabase URL and public API key.

                   
                       import { createClient } from '@supabase/supabase-js';
   
                       const supabaseUrl = 'YOUR_SUPABASE_URL';
                       const supabaseKey = 'YOUR_SUPABASE_PUBLIC_API_KEY';
                       
                       const supabase = createClient(supabaseUrl, supabaseKey);                    
                   
               

3. Implement Authentication: Registering a New User:

                   
                       async function registerUser(email, password) {
                           const { user, error } = await supabase.auth.signUp({
                             email,
                             password,
                           });
                         
                           if (error) {
                             // Handle registration error
                           } else {
                             // User successfully registered
                           }
                         }                      
                   
               

   Logging In a User:

                   
                       async function loginUser(email, password) {
                           const { user, error } = await supabase.auth.signIn({
                             email,
                             password,
                           });
                         
                           if (error) {
                             // Handle login error
                           } else {
                             // User successfully logged in
                           }
                         }                      
                   
               

   Logging Out a User:

                   
                       async function logoutUser() {
                           const { error } = await supabase.auth.signOut();
                         
                           if (error) {
                             // Handle logout error
                           } else {
                             // User successfully logged out
                           }
                         }                      
                   
               

4. Use Authentication in Components:

   Integrate authentication into your SolidJS components to enable user registration, login, logout, and access control.

   For instance, you can create UI elements and forms that interact with the authentication functions created above.

   Example Usage in SolidJS Components:

                   
                       import { onCleanup, createSignal } from 'solid-js';
   
                       function RegisterForm() {
                         const [email, setEmail] = createSignal('');
                         const [password, setPassword] = createSignal('');
                       
                         const handleRegister = async () => {
                           await registerUser(email(), password());
                         };
                       
                         return (
                           <form onSubmit={handleRegister}>
                             <input type="email" value={email()} onChange={(e) => setEmail(e.target.value)} />
                             <input type="password" value={password()} onChange={(e) => setPassword(e.target.value)} />
                             <button type="submit">Register</button>
                           </form>
                         );
                       }
                       
                       function App() {
                         return (
                           <div>
                             <h1>Authentication with Supabase</h1>
                             <RegisterForm />
                             {/* Add other components for login, logout, etc. */}
                           </div>
                         );
                       }
                       
                       export default App;                    
                   
               

This example showcases a simple registration form using SolidJS and Supabase authentication. You can expand upon this by implementing login forms, handling session persistence, and incorporating user-specific functionalities within your SolidJS application.

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