Interactive learning library built with the with/without explainer methodology. Every skill has hands-on examples, SVG diagrams, live simulations, MCQ quizzes, and coding challenges.
All 19 hooks, lifecycle, virtual DOM & Fiber, debugging. State management: Redux Toolkit, Zustand, Jotai, Valtio, Signals, TanStack Query. Forms: Formik, React Hook Form, Zod.
Types, functions, utility types, advanced generics, conditional types, patterns, tsconfig tooling, React types, API type generation.
Event loop, async patterns, streams, worker threads, ESM/CJS modules, fs/path, HTTP servers, debugging & profiling, testing, security.
Architecture, SQL, indexing, query plans, partitioning, concurrency, JSONB, replication, performance tuning, extensions.
Patterns, transactional outbox, sagas, idempotency, event testing, observability. SVG message flow diagrams.
Decomposition, API gateway, resilience, discovery & config, observability, monolith migration strategies.
Extract, transform, load, orchestration DAGs, data quality, idempotency. SVG pipeline flow diagrams.
Queues, workers, retries & backoff, scheduling, patterns, observability. SVG job lifecycle diagram.
Data structures, pub/sub, streams & consumer groups, persistence, caching & eviction, clustering.
Protocol, connection lifecycle, rooms, scaling with Redis adapter, auth, binary frames. SVG lifecycle diagram.