Node.js
JavaScript on the server.
Node.js runs JavaScript outside the browser: on servers, in command-line tools and in the build tools you use every day. This track takes you from your first node command to a tested, secure JSON API: modern ES modules and npm, the event loop and worker threads, files and streams, HTTP servers with node:http and Express 5, validation, errors and logging, the built-in test runner, TypeScript with no build step, and deployment.
You already know JavaScript. Here you learn to run it where the data lives.
- Lessons
- 21
- Time
- 3 h
- Level
- Intermediate
- Bronze open
- Silver open
- Gold locked
Ready to prove it?
Three exams are waiting: Bronze, Silver and Gold.
What you'll be able to do
- Set up modern projects with ES modules, npm scripts and Node's built-in modules
- Explain the event loop and keep it free with async I/O and worker threads
- Read, write and stream files safely, even huge ones
- Build a REST JSON API with Express 5, validation and central error handling
- Test with
node:test, run TypeScript directly and ship to production with Docker
The journey
1 Module 1Node.js basics
What Node is, ES modules, built-in modules, npm and scripts.
0 / 42 Module 2The event loop
How one thread serves thousands, worker threads and EventEmitter.
0 / 33 Module 3Files and streams
Read and write files, build safe paths and stream big data.
0 / 34 Module 4HTTP servers
Build servers with node:http, then with Express 5.
0 / 35 Module 5A real JSON API
REST routes, validation, errors, logs and a leaderboard.
0 / 46 Module 6Ready for production
Tests, TypeScript, configuration, security headers and Docker.
0 / 4