Jul 23, 2025 · The nullish coalescing (??) operator is a logical operator in TypeScript that returns its right-hand side operand if the left-hand side operand is null or undefined; otherwise, it returns the left …

TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.

Examples in Each Chapter Our "Try it Yourself" editor makes it easy to learn TypeScript. You can edit TypeScript code and view the result in your browser.

The TypeScript compiler, named tsc, is written in TypeScript. As a result, it can be compiled into regular JavaScript and can then be executed in any JavaScript engine (e.g. a browser).

TypeScript is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any host, on any OS.

This TypeScript tutorial helps you master TypeScript. You'll learn the ins and outs of TypeScript programming.

🎉 Latest Release TypeScript 5.8 is now available. Explore what's new in the latest version of TypeScript!

Dive into the chapters below to embark on your TypeScript journey. Each section offers tutorials, example code, exercises, and solutions to consolidate your understanding.

Elevate your JavaScript skills by learning TypeScript, a language designed to create more reliable and maintainable code. TypeScript enhances JavaScript with its type system, helping you develop error …

Mar 11, 2026 · TypeScript is a superset of JavaScript that adds extra features like static typing, interfaces, enums, and more. Essentially, TypeScript is JavaScript with additional syntax for defining …