microsoft/TypeScriptPublic

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

AI summary: A strongly typed superset of JavaScript that compiles to clean, standard JavaScript for large-scale application development.

Star on GitHub

Stars: 111K; +18 today
Forks: 13.8K
Watchers: 2.2K
Open issues: 4.9K
Open PRs: 117
Contributors: ~1.1K
Commits: 39.4K
Branches: 81

GoApache-2.0Created Jun 17, 2014Last push todayLatest release v7.0.2+118 stars this week+462 this month

Star history

since Jan 8, 2023

111K stars as of Sep 10, 2026, tracked back to Jan 8, 2023. Historical curve reconstructed from public GitHub event archives, calibrated to the current total.

Contribution activity

commits per day, last 52 weeks

1,663 commits in the last yearLessMore

Signals and awards

derived from tracked data

Landmark project
110,994 stars
Battle-tested
12 years of history
Very active
1,663 commits in 52 weeks
Community-driven
~1,058 contributors
Well documented
High community health score
Permissive license
Apache-2.0
Continuous integration
Automated checks passing
Repeat trending
3 trending appearances

What TypeScript does

TypeScript adds optional static typing to JavaScript to enable better tooling, early error detection, and safer refactoring for large-scale codebases. It is designed to run in any browser, on any host, and within any operating system by compiling down to standard, readable JavaScript. By providing powerful features like interfaces, enums, and advanced type inference, it acts as a robust development layer that prevents common runtime errors. The compiler actively checks types during development, ensuring that complex applications remain maintainable and scalable. It allows developers to incremently adopt strict typing without sacrificing the inherent flexibility of the JavaScript ecosystem.

JavaScript developers, frontend and backend engineering teams, and framework authors seeking better tooling, type safety, and maintainability for complex applications.

Static Type Checking: Catch potential runtime errors at compile time by adding optional type annotations to variables and functions.
Advanced Editor Support: Enable rich autocompletion, safe refactoring, and inline documentation in IDEs like Visual Studio Code.
JavaScript Compatibility: Compile directly to clean, standards-based JavaScript that runs reliably on any modern browser or Node.js environment.
Gradual Adoption: Allow developers to incrementally add strict type checking to existing JavaScript codebases without requiring a complete rewrite.
Object-Oriented Constructs: Utilize interfaces, classes, and generic types to enforce strict architectural contracts across large engineering teams.

Where teams use it

Large-Scale Web Applications

Building complex frontend codebases where strict typing prevents regressions and facilitates collaboration among dozens of developers.

Robust Backend Development

Creating resilient Node.js servers with predictable API contracts and strongly typed data models.

Library Authorship

Publishing npm packages with integrated type definitions to provide immediate IntelliSense to consumers.

Safe Refactoring

Renaming variables and modifying function signatures across hundreds of files with confidence that the compiler will catch all misalignments.

Getting started: npm install -D typescript

README

main branch

TypeScript

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. TypeScript compiles to readable, standards-based JavaScript. Try it out at the playground, and stay up to date via our blog and Twitter account.

Find others who are using TypeScript at our community page.

Installing

For the latest stable version:

npm install -D typescript

For our nightly builds:

npm install -D typescript@next

Contribute

There are many ways to contribute to TypeScript.

Submit bugs and help us verify fixes as they are checked in.
Review the source code changes.
Engage with other TypeScript users and developers on StackOverflow.
Help each other in the TypeScript Community Discord.
Join the #typescript discussion on Twitter.
Contribute bug fixes.

This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Documentation

Roadmap

For details on our planned features and future direction, please refer to our roadmap.

View on GitHub

Recent activity

commits and pull requests

[WIP] Fix window.opener type from any to correct typeDraft
#64212 by Copilot · updated 1d ago
[api] Add `GenericType` typeOpen
#64190 by mrazauskas · updated 1d ago
Prevent deadlock in `getCompletionsAtPosition(..., { includeSymbol: true })` APIOpen
#64178 by auvred · updated 1d ago
Fix: disallow optional call chaining on import.defer expressions (#63679)Open
#64199 by vaibhavsrv · updated 1d ago
Run extension tagging on mainMerged
#64209 by jakebailey · updated 1d ago
Use gotestsum as a Go toolOpen
#64211 by jakebailey · updated 1d ago
Run extension tagging on main (#64209)
jakebailey committed f3b04fe · 1d ago
Fix case sensitivity fswatch and usersDraft
#64210 by jakebailey · updated 1d ago
Infer recursive types through object literal gettersOpen
#64172 by colinhacks · updated 1d ago
Bump js-yaml from 4.3.1 to 4.3.2 (#64207)
dependabot[bot] committed 3bf523a · 1d ago
Benchmark generator API, fix performance of nested `all` calls (#64206)
weswigham committed fe5d056 · 1d ago
Add independent VS Code extension releases (#64139)
jakebailey committed bf7f49d · 1d ago

Recent open issues

view all

`--stableTypeOrdering` defects: compiler hang (NaN in `compareNodes`), missing `BigIntLiteral`, primitive alias bypass, and mapper omissions
#64203 · 2d ago · by trevorade · 4 comments
Unactionable
Perhaps there is an incorrect test directive in `useStrictLikePrologueString01`
#64198 · 2d ago · by bvanjoi · 1 comments
Infrastructure
Excess property checks silently skipped for nested object literals at reverse-mapped-type inference sites (regression in 6.0)
#64197 · 2d ago · by quithyot · 2 comments
Duplicate

Releases and announcements

218 total

TypeScript 7.0.2v7.0.2Aug 20, 20265.2K downloads
https://devblogs.microsoft.com/typescript/announcing-typescript-7-0/ This tag was originally released at: https://github.com/microsoft/typescript-go/releases/tag/typescript%2Fv7.0.2
TypeScript 6.0.3v6.0.3Apr 16, 20262.6K downloads
For release notes, check out the [release announcement blog post](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0/). * [fixed issues query for TypeScript 6.0.0 (Beta)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.0%22). * [fixed issues query for TypeScript 6.0.1 (RC)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.1%22). * [fixed issues query for TypeScript 6.0.2 (Stable)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.2%22). * [fixed issues query for TypeScript 6.0.3 (Stable)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.3%22). Downloads are available on: * [npm](https://www.npmjs.com/package/typescript)
TypeScript 6.0v6.0.2Mar 23, 2026617 downloads
For release notes, check out the [release announcement blog post](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0/). * [fixed issues query for TypeScript 6.0.0 (Beta)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.0%22). * [fixed issues query for TypeScript 6.0.1 (RC)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.1%22). * [fixed issues query for TypeScript 6.0.2 (Stable)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.2%22). Downloads are available on: * [npm](https://www.npmjs.com/package/typescript)
TypeScript 6.0.1 RCv6.0-rcMar 6, 2026pre-release35 downloads
For release notes, check out the [release announcement blog post](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0-rc/). * [fixed issues query for TypeScript 6.0.0 (Beta)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.0%22). * [fixed issues query for TypeScript 6.0.1 (RC)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.1%22). Downloads are available on: * [npm](https://www.npmjs.com/package/typescript)
TypeScript 6.0 Betav6.0-betaFeb 18, 2026pre-release89 downloads
For release notes, check out the [release announcement](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0-beta/). * [fixed issues query for Typescript 6.0.0 (Beta)](https://github.com/Microsoft/TypeScript/issues?utf8=%E2%9C%93&q=milestone%3A%22TypeScript+6.0.0%22+is%3Aclosed+). Downloads are available on: * [npm](https://www.npmjs.com/package/typescript)

Commits per week

last 52 weeks

1.7K commits in the last 52 weeks.

When work happens

weekday and hour

Commit volume by weekday and hour (UTC). Larger dots mean more commits.

Date	List	Rank	Stars gained
Aug 24, 2026	daily	#10	+104
Aug 23, 2026	daily	#10	+104
Aug 22, 2026	daily	#4	+65

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