TypeScript

Overview

TypeScript adds optional static types to JavaScript, enabling better tooling and error detection for large-scale applications. It compiles to readable, standards-based JavaScript that runs in any browser, host, or OS. Widely used by millions for building enterprise-grade software.

README Preview

# TypeScript\r\n\r\n\r\n\r\n[](https://github.com/microsoft/TypeScript/actions/workflows/ci.yml)\r\n[](https://www.npmjs.com/package/typescript)\r\n[](https://www.npmjs.com/package/typescript)\r\n[](https://securityscorecards.dev/viewer/?uri=github.com/microsoft/TypeScript)\r\n\r\n\r\n[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).\r\n\r\nFind others who are using TypeScript at [our community page](https://www.typescriptlang.org/community/).\r\n\r\n## Installing\r\n\r\nFor the latest stable version:\r\n\r\n```bash\r\nnpm install -D typescript\r\n```\r\n\r\nFor our nightly builds:\r\n\r\n```bash\r\nnpm install -D typescript@next\r\n```\r\n\r\n## Contribute\r\n\r\n**NOTE: Code changes in this repo are now limited to a small category of fixes**:\r\n\r\n * 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\r\n * Security issues\r\n * Language service crashes that substantially impact mainline usage\r\n * Serious regressions from 5.9 (these must *seriously* impact a *large* proportion of users)\r\n\r\nMost bug fixes should be submitted to the [typescript-go](https://github.com/microsoft/TypeScript-go) repository.\r\nFeature additions and behavioral changes are currently on pause until TypeScript 7.0 is completed.\r\n\r\nThere are many ways to [contribute](https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md) to TypeScript.\r\n* [Submit bugs](https://github.com/microsoft/TypeScript/issues) and help us verify fixes as they are