Build a robust React dark mode with CSS variables, system preference, SSR-safe setup, persistence, accessibility, and Tailwind integration.
Apollo vs Relay: strengths, trade‑offs, and when to choose each for React GraphQL apps, from caching and pagination to SSR, typing, and developer UX.
A practical guide to unit testing React with Testing Library—setup, queries, user events, async, MSW, providers, and best practices.
A hands-on React drag-and-drop tutorial using dnd-kit: from basics to a Kanban board, with accessibility, performance tips, and common pitfalls.
Build performant React infinite scroll using IntersectionObserver, React Query, and virtualization, with production tips and code examples.
Build a headless React UI component library step by step—accessibility, state, TypeScript, testing, and packaging—using a fully featured Tabs example.
