Components, hooks, state, and patterns.
3 topics
Props, children, composition.
1 resource
useState, controlled inputs.
useEffect lifecycle.
Memoization patterns.
DOM refs and mutable values.
Reusable stateful logic.
fetch, SWR, React Query.
React Router or Next.js routing.
React Hook Form + Zod.
Flexible composition APIs.
Old-school but useful patterns.
Profiler, memo, virtualization.