React

JSX and rendering model ★ recommended

Hooks: useState/useEffect basics ★ recommended

Component composition patterns ★ recommended

Forms basics ★ recommended

Error boundaries overview ★ recommended

Lifting state up ★ recommended

Context patterns (when/why) ★ recommended

State libraries overview ★ recommended

Server state vs UI state ★ recommended

Memoization basics (useMemo/useCallback) ★ recommended

Fetching patterns and caching ★ recommended

Pagination/infinite queries overview ★ recommended

Optimistic updates overview ★ recommended

Error and loading UX patterns ★ recommended

API contracts with TS overview ★ recommended

Client-side routing basics ★ recommended

Protected routes patterns ★ recommended

Code splitting ★ recommended

SSR/SSG overview ★ recommended

SEO considerations overview ★ recommended

Component tests with Testing Library ★ recommended

Mocking network requests ★ recommended

E2E overview (Playwright) ★ recommended

CI test runs ★ recommended

Performance basics and profiling ★ recommended