# 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://blogs.msdn.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

**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](https://github.com/microsoft/TypeScript-go) repository.
Feature additions and behavioral changes are currently on pause until TypeScript 7.0 is completed.

There are many ways to [contribute](https://github.com/microsoft/TypeScript/blob/main/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](https://github.com/microsoft/TypeScript/blob/main/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).
