CodePen Training – Mastering CodePen: Email & Password Authentication

🔥 In Part 8 of the Mastering CodePen series, we implement Email & Password Authentication using Firebase, creating a fully functional login and signup system directly within your CodePen project—no backend setup required!

✅ What you’ll learn in this video:
✔️ Creating and configuring Firebase Authentication for Email/Password
✔️ Setting up a signup form with name, email, and password fields
✔️ Creating users with createUserWithEmailAndPassword()
✔️ Logging users in with signInWithEmailAndPassword()
✔️ Handling authentication state changes with onAuthStateChanged()
✔️ Displaying login/logout buttons based on user session
✔️ Showing user-specific data (email, UID) after login
✔️ Error handling: invalid email, weak password, user not found, etc.
✔️ Logging out users securely with signOut()

💡 Why Email/Password Auth Is Essential:
🔹 Most widely used authentication method in web apps
🔹 Gives you complete control over user credentials
🔹 Great stepping stone before exploring more advanced auth like JWT or OAuth
🔹 Perfect for prototyping and learning full-stack flows