Category: Node.js

Send transactional emails from Node.js using Nodemailer and SMTP credentials.

Capstone todo API with Express, MongoDB/Mongoose, validation, JWT auth, and CRUD endpoints.

Accept multipart file uploads in Express with Multer and store files on disk.

Store secrets and config in .env files and load them with dotenv — never commit API keys.

Set and read HTTP cookies in Express for preferences and lightweight client state.

Manage server-side sessions with express-session for login state across requests.

Implement stateless auth by signing and verifying JSON Web Tokens in Express APIs.

Enable and configure CORS in Express so browser frontends can call your API safely.

Host MongoDB in the cloud with Atlas and connect securely from your Node.js app.

Practice common Node.js and Express interview questions with short, clear answers.