Learn KOA-JS with Real Code Examples

Simple REST API

Blog backend with CRUD operations

Authentication server using JWT

E-commerce API with routing and middleware

Real-time server with WebSocket integration

Ensure Node.js version supports async/await

Verify middleware order for correct execution

Check route definitions if using koa-router

Handle uncaught errors with try/catch

Monitor logs for runtime exceptions

Use Mocha, Chai, or Jest for unit testing

Test API endpoints with Postman or Insomnia

Mock database connections

Validate middleware execution order

Automate tests in CI/CD

Cloud providers (AWS, Heroku, DigitalOcean)

Docker containerization

PM2 or cluster mode for multiple processes

Nginx reverse proxy for production

Serverless adapters (optional)

Node.js runtime

Nodemon for development

Postman or Insomnia for API testing

koa-router for routing

koa-bodyparser for parsing requests

Databases (MongoDB, MySQL, PostgreSQL)

Authentication (JWT, OAuth2) via middleware

Templating engines (Pug, EJS) if needed

WebSockets (ws or socket.io)

Frontend frameworks (React, Angular, Vue)

Use async middleware for clean flow

Compose middleware for modularity

Automate testing and deployment

Use third-party libraries wisely

Monitor logs for proactive maintenance

Managing middleware order

Error handling in async context

Integrating third-party modules manually

Structuring large Koa apps

Securing API endpoints