TypeScript

<!-- CODING AGENTS: READ AGENTS.md BEFORE WRITING CODE -->

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:

bashCopy
npm install -D typescript

For our nightly builds:

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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
with any additional questions or comments.

Documentation

• TypeScript in 5 minutes
• Programming handbook
• Homepage

Roadmap

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