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TypeScript Programming in 2026
A practical, code-first guide to mastering TypeScript's type system in 2026. From strict mode and generics to advanced types, testing, and real-world React and API applications, you'll go from your first tsc command to shipping type-safe, full-stack code with confidence.
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About the Book
TypeScript Programming in 2026 is a hands-on, practical guide for developers who want to master TypeScript's type system from the ground up. Whether you're a JavaScript developer ready to go all-in on types, or you're arriving from a statically typed language like Java, C#, or Go and need to understand how TypeScript's structural, erasure-based model works, this book meets you where you are.
Across twelve chapters, you'll move from your very first tsc command to typing a complete full-stack application. You'll learn the fundamentals of primitives, interfaces, and generics; dig into advanced features like mapped types, conditional types, and template literals; master narrowing and discriminated unions; and build typed classes, modules, and monorepos. Later chapters cover the tooling that keeps large codebases fast and reliable (ESLint, Prettier, project references), typing the DOM, Node, and third-party JavaScript, testing typed code with Vitest and type-level assertions, and applying all of it to real REST APIs, React components, and Express/Fastify backends. A final chapter looks at where TypeScript is headed, including erasable syntax, native compiler performance, and its growing role in AI and agent SDKs.
Every concept is paired with complete, runnable examples and a clear explanation of how to adapt it to your own code. By the end, you'll be able to read any TypeScript codebase with confidence, configure a project that catches bugs before they ship, and design APIs that are both statically and runtime checked.
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About the Author
SouthStone Publications
SouthStone Publications is a publisher dedicated to advancing practical knowledge across web development, IT engineering, programming, artificial intelligence, and cybersecurity. Working closely with a network of subject matter experts and industry practitioners, SouthStone produces books, guides, and training programs designed to translate complex technical concepts into clear, actionable knowledge. Its catalog has supported developers, engineers, analysts, and security professionals around the world in building more resilient, scalable, and well-architected systems.
Proud to be the first publisher in the Cybersecurity category on LeanPub, SouthStone Publications is committed to bridging the gap between deep technical expertise and accessible education, helping practitioners at every stage of their careers stay ahead in a rapidly evolving digital landscape.
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