first — Next.js 16 + Firebase Auth

A Next.js 16 learning project with Firebase Authentication, Tailwind CSS v4, and a full Vitest test suite.

Features

• /login — email/password login with Firebase Auth, remember me, and password visibility toggle
• Vitest unit, hook, and component tests
• Firebase Auth emulator for integration tests

Getting started

Copy the environment file and fill in your Firebase project values:

cp .env.local.example .env.local   # then edit with your Firebase config
pnpm install
pnpm dev

Open http://localhost:3000/login.

Commands

Command	Description
pnpm dev	Start dev server (Turbopack)
pnpm build	Production build
pnpm lint	Run ESLint
pnpm test:run	Run unit/hook/component tests (44 tests)
pnpm test	Run tests in watch mode
pnpm test:integration	Run Firebase emulator integration tests

Integration tests

Requires the Firebase CLI and Java 17+.

firebase emulators:start --only auth   # in one terminal
pnpm test:integration                  # in another