TypeScriptJavaScript with Types

A powerful typed superset of JavaScript that scales from simple scripts to enterprise-grade systems.

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Handbook

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🛡️

Type Safety

Prevent runtime errors with compile-time checks. TypeScript makes your code safer and more predictable.

🔄

JavaScript Compatible

Start using TypeScript with zero friction. It's fully compatible with existing JavaScript codebases.

🚀

Tooling Power

Get advanced autocompletion, refactoring tools, and real-time error feedback in your editor.

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Deep Documentation

Learn everything from the basics to advanced types. Our guides are clear, practical, and up to date.

🌍

Built to Scale

TypeScript is trusted by startups and enterprises alike, supporting projects of every size.

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Ecosystem Ready

Works with popular frameworks, libraries, and has type definitions for thousands of packages.

🎉 Latest Release

TypeScript 6.0 is now available. See what's new, what's been retired, and how to get your project ready for what's next.

Read Release Notes

📖 Start Reading

The most-read chapters of the Handbook. Pick whichever matches what you're working on.

📘

The Handbook

Start here — the canonical tour of the language.

📝

Everyday Types

Primitives, arrays, unions, literals, and friends.

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Object Types

Interfaces, optional and readonly properties.

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Functions

Overloads, generics, this, and rest parameters.

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Classes

Inheritance, visibility, abstract, and members.

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Modules

Imports, exports, and the module systems.

🚀 Stay Current

TypeScript moves fast. Here's how to keep up.

▶︎

Playground

Try TypeScript in your browser — no install required.

🆕

Release Notes

Every release, from 1.1 to 6.0 — features, breaking changes, performance.

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Contribute

This site is open-source. Edits, fixes, and additions welcome.