TypeScript Handbook 2026

TypeScript Handbook 2026 is the definitive guide to TypeScript — the typed superset of JavaScript that has become the standard for professional JavaScript development. Why TypeScript matters: - Catches errors at compile time, not runtime - Better IDE support and autocomplete - Self-documenting code through types - Required by most professional teams in 2026 This handbook covers: - TypeScript fundamentals: basic types, interfaces, type aliases - The full type system: generics, conditional types, mapped types - TypeScript with React: typing props, hooks, and context - TypeScript with Node.js and Express - Utility types: Partial, Required, Pick, Omit, ReturnType - Strict mode and best practices - Migrating JavaScript projects to TypeScript - Common TypeScript gotchas and solutions