microsoft/TypeScript
TypeScript
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source ↗microsoft/TypeScript
Description: TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
Language: TypeScript
License: Apache-2.0
Stars: 109181
Forks: 13423
Open issues: 5039
Created: 2014-06-17T15:28:39Z
Pushed: 2026-06-08T22:55:38Z
Default branch: main
Fork: no
Archived: no
README:
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
NOTE: Code changes in this repo are now limited to a small category of fixes:
- Crashes that were introduced in 5.9 or 6.0 that *also* repro in 7.0 *and* have a portable fix *and* don't incur other behavioral changes
- Security issues
- Language service crashes that substantially impact mainline usage
- Serious regressions from 5.9 (these must *seriously* impact a *large* proportion of users)
Most bug fixes should be submitted to the typescript-go repository. Feature additions and behavioral changes are currently on pause until TypeScript 7.0 is completed.
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](mailto: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.