Environment Variables — Study Resources & PYQs

Curated resources, past papers and PYQs for Environment Variables.

Study resources

dotenv (Article) — The official dotenv package documentation for loading .env files into process.env.
Environment Variables (Article) — The official Next.js documentation on public vs server-only environment variables.
Environment Variables in Node.js (Video) — Web Dev Simplified shows how to properly store and hide API keys, secrets, and ports using dotenv.