Learn EXPRESS-JS with Real Code Examples

Todo REST API

Blog backend with CRUD operations

Authentication server (JWT, OAuth)

E-commerce backend services

Real-time server with WebSockets integration

Ensure Node.js and Express versions are compatible

Check port availability and firewall settings

Debug middleware order and routing conflicts

Handle asynchronous errors with try/catch or middleware

Monitor server logs for runtime exceptions

Use Jest or Mocha/Chai for unit testing

Test API endpoints with Postman

Mock database connections

Validate middleware and error handling

Automate tests in CI/CD pipelines

Cloud services like AWS, Heroku, DigitalOcean

Docker containerization

Serverless platforms (AWS Lambda, Vercel) with Express adapters

PM2 process manager for Node.js apps

Reverse proxy with Nginx for production

Node.js runtime

Nodemon for auto-reload

Postman or Insomnia for API testing

Database drivers (MongoDB, MySQL, PostgreSQL)

Middleware modules from npm

MongoDB, MySQL, PostgreSQL databases

Templating engines like EJS, Pug, Handlebars

Authentication (Passport.js, JWT)

WebSockets (Socket.io) for real-time apps

Frontend frameworks (React, Angular, Vue)

Use modular middleware for reusability

Leverage npm ecosystem for plugins

Automate testing and deployment

Use async/await to avoid callback hell

Monitor logs for continuous improvements

Managing middleware order

Handling async errors properly

Optimizing performance for high traffic

Structuring large Express apps

Securing the API against common vulnerabilities