How React Works
- Parts
- 12 parts
- Reading time
- 1 h 30 min
A plain-language course on the ideas behind React 19, from UI as a function of state through rendering, reconciliation, fiber, priorities, commit and hooks, built on one small app.
Courses
Lessons
3 courses, 56 parts, about 11 h 7 min of reading.
React Internals
- Parts
- 18 parts
- Reading time
- 3 h 18 min
A source-level tour of how React 19 turns your components into pixels, from createRoot and lanes to fibers, hooks, the commit phase and the React Compiler.
Next.js in Practice
- Parts
- 26 parts
- Reading time
- 6 h 19 min
A practical, source-backed course on Next.js 16, from the App Router, Server Components and Cache Components to rendering strategies, auth patterns and recipes for everyday problems.