React Basics is a comprehensive learning repository centered on React 19 and the wider modern React ecosystem. It covers JSX, components, props, state, lifecycle behavior, forms, Context, and major React hooks. Intermediate and advanced material explores performance optimization, error boundaries, lazy loading, Suspense, and code splitting. State management resources include Redux, Redux Toolkit, middleware, selectors, and RTK Query. Testing material covers Jest, React Testing Library, snapshots, mocks, and unit-testing patterns. ...