Section 01
Koa Foundations
Install Koa, create an app, and learn ctx, request, and response.
10 / 10 lessons
Koa 2 · intermediate
Koa.js track
Build Node web apps and APIs with Koa. A tiny, un-bundled core, an async/await middleware stack with true cascading, and a single ctx object — plus the koa-router, bodyparser, session, jwt, and helmet ecosystem that real Koa apps are built from.
Start the first lesson
70 of 70 lessons live
Section 02
Routing
koa-router — params, methods, nested routers, prefixes, 404s.
10 / 10 lessons
Section 03
Middleware Mastery
The cascading async pipeline every Koa request flows through.
10 / 10 lessons
Section 04
Building REST APIs
Body parsing, controllers, services, validation, versioning, OpenAPI.
10 / 10 lessons
Section 05
Auth & Security
Sessions, cookies, JWT, Passport, OAuth, helmet, CSRF, rate limits.
10 / 10 lessons
Section 06
Data & Realtime
Databases, ORMs, uploads, static files, streaming, SSE, WebSockets.
10 / 10 lessons
Section 07
Production
Test, log, monitor, debug, scale, deploy, dockerize.
10 / 10 lessons