next-firebase-auth

Simple Firebase authentication for all Next.js rendering strategies. This package makes it simple to get the authenticated Firebase user and ID token during both client-side and server-side rendering (SSR). We treat the Firebase JS SDK as the source of truth for auth status. When the user signs in, we call an endpoint to generate a refresh token and store the user info, ID token, and refresh token in cookies. Future requests to SSR pages receive the user info and ID token from cookies, refreshing the ID token as needed. When the user logs out, we unset the cookies. This package will likely be helpful if you're using Firebase authentication and expect to use server-side rendering—especially if you need access to Firebase ID tokens on the server side. If your app only uses static pages or doesn't need the Firebase user for SSR, use the Firebase JS SDK directly to load the user on the client side.