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

javascript language typechecker typescript

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Anders Hejlsberg e713577fc8 Include declaration emit in tests		2024-07-30 10:01:06 -07:00
.devcontainer	Add dprint to devcontainer (#55581 )	2023-08-30 17:04:28 -07:00
.github	Bump the github-actions group with 2 updates (#59454 )	2024-07-29 09:55:12 -07:00
.vscode	Use explicit extensions for imports within src (#58421 )	2024-05-06 17:07:54 -07:00
bin	Moved LKG folder to lib	2015-07-27 10:07:07 -07:00
scripts	Update deps (#59188 )	2024-07-17 19:40:38 -07:00
src	Allow references to const variables with literal types in constant expressions	2024-07-30 09:30:01 -07:00
tests	Include declaration emit in tests	2024-07-30 10:01:06 -07:00
.c8rc.json	Use monocart for coverage reports, enable codecov (#58850 )	2024-07-17 14:55:45 -07:00
.dprint.jsonc	Update dprint to pick up comment bugfix (#59358 )	2024-07-19 17:57:50 -07:00
.editorconfig	Use CRLF, not LF.	2015-03-02 14:38:24 -08:00
.git-blame-ignore-revs	Add dprint commit to git-blame-ignore-revs (#55402 )	2023-08-16 14:32:14 -07:00
.gitattributes	Make GitHub render json as jsonc (#52335 )	2023-01-20 12:08:26 -08:00
.gitignore	Make sure virtual file system with watch behaves same way as sys/node so we have proper test coverage for symlinks (#57607 )	2024-03-29 09:48:51 -07:00
.gulp.js	Remove hereby gulp shim warning (#56759 )	2024-01-04 11:08:04 -08:00
CODE_OF_CONDUCT.md	Added Microsoft code of conduct file	2018-10-05 22:10:20 +01:00
CONTRIBUTING.md	Modify `CONTRIBUTING.md` and the issue templates `bug_report.yml` and `feature_request.yml` to reduce duplicate issues and improve the quality of further submitted issues (#58155 )	2024-04-22 08:43:49 -07:00
Herebyfile.mjs	Remove unused exports & dead code (using Knip) (#56817 )	2024-06-27 14:24:01 -07:00
LICENSE.txt	Add snapshot of compiler sources	2014-07-12 17:30:19 -07:00
README.md	Update OpenSSF scorecard link to new page rather than raw API (#58003 )	2024-03-29 15:24:56 -07:00
SECURITY.md	Update SECURITY.md from 0.0.5 to 0.0.9 (#55651 )	2023-09-06 13:19:32 -07:00
SUPPORT.md	Initial add of Support.md (#55962 )	2023-10-05 10:36:20 -07:00
ThirdPartyNoticeText.txt	Fix ThirdPartyNoticeText.txt encoding (#53184 )	2023-03-09 13:05:02 -08:00
azure-pipelines.release.yml	Add gitHead to package.json in all release workflows (#58135 )	2024-04-19 15:54:56 -07:00
eslint.config.mjs	Enable typed linting for scripts dir (#59073 )	2024-07-09 15:15:35 -07:00
knip.jsonc	Use monocart for coverage reports, enable codecov (#58850 )	2024-07-17 14:55:45 -07:00
package-lock.json	Update deps, to TS 5.5.4 (#59395 )	2024-07-23 10:32:11 -07:00
package.json	Update deps, to TS 5.5.4 (#59395 )	2024-07-23 10:32:11 -07:00

README.md

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

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

Roadmap

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