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microsoft/TypeScript

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

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README.md

# TypeScript

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[TypeScript](https://www.typescriptlang.org/) 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](https://www.typescriptlang.org/play/), and stay up to date via [our blog](https://devblogs.microsoft.com/typescript/) and [Twitter account](https://twitter.com/typescript).

Find others who are using TypeScript at [our community page](https://www.typescriptlang.org/community/).

## Installing

For the latest stable version:

```bash
npm install -D typescript
```

For our nightly builds:

```bash
npm install -D typescript@next
```

## Contribute

There are many ways to [contribute](CONTRIBUTING.md) to TypeScript.
* [Submit bugs](https://github.com/microsoft/TypeScript/issues) and help us verify fixes as they are checked in.
* Review the [source code changes](https://github.com/microsoft/TypeScript/pulls).
* Engage with other TypeScript users and developers on [StackOverflow](https://stackoverflow.com/questions/tagged/typescript).
* Help each other in the [TypeScript Community Discord](https://discord.gg/typescript).
* Join the [#typescript](https://twitter.com/search?q=%23TypeScript) discussion on Twitter.
* [Contribute bug fixes](CONTRIBUTING.md).

This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see
the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com)
with any additional questions or comments.

## Documentation

*  [TypeScript in 5 minutes](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html)
*  [Programming handbook](https://www.typescriptlang.org/docs/handbook/intro.html)
*  [Homepage](https://www.typescriptlang.org/)

## Roadmap

For details on our planned features and future direction, please refer to our [roadmap](https://github.com/microsoft/TypeScript/wiki/Roadmap).

Repository info

Default branch: main
Latest version: v7.0.2
Created: 2014-06-17
Last activity: 2026-10-13
License: Apache-2.0
Open issues: 5.1k
Watchers: 2.2k

Topics

javascript language typechecker typescript

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