TypeScript Handbook

The TypeScript Handbook is the official documentation for TypeScript, the typed superset of JavaScript. It offers guides for different starting points, a handbook for daily work, and reference pages for the language and the compiler.

The docs start with short introductions written for people with different backgrounds, such as new programmers, JavaScript developers and developers coming from Java or C#. The Handbook then covers everyday types, narrowing, functions, object types, generics and more advanced type features. Reference pages describe modules, compiler options and tsconfig settings in detail.

• Starter guides for new programmers and JavaScript developers
• Handbook sections on types, generics and narrowing
• Reference pages for compiler options and tsconfig
• Guides for Node.js, React and Angular projects
• Cheat sheets available as PDF and PNG downloads

JavaScript developers moving to typed code, and teams that want a shared reference for TypeScript syntax and project setup. It is also useful for library authors who need to write declaration files.

The documentation is free to read, and TypeScript itself is open source. The docs run in a web browser, and the tools they describe run on the developer's own machine. Some pages focus on specific build tools or environments, so start with the section that matches your project.