A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.
7,073
stars
5,113
commits
TypeScript
primary language
Sep 11, 2026
updated
README
ts-jest
A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.
It supports all features of TypeScript including type-checking. Read more about Babel7 + preset-typescript vs TypeScript (and ts-jest).
We are not doing semantic versioning and 23.10 is a re-write, run npm i -D ts-jest@"<23.10.0" to go back to the previous version |
|---|
View the online documentation (usage & technical)
Ask for some help in the Jest Discord community or ts-jest GitHub Discussion
Before reporting any issues, be sure to check the troubleshooting page
We're looking for collaborators! Want to help improve ts-jest?
Getting Started
These instructions will get you setup to use ts-jest in your project. For more detailed documentation, please check online documentation.
| using npm | using yarn | |
|---|---|---|
| Prerequisites (TypeScript 4.3–6) | npm i -D jest typescript | yarn add --dev jest typescript |
| Installing | npm i -D ts-jest @types/jest | yarn add --dev ts-jest @types/jest |
| Creating config | npx ts-jest config:init | yarn ts-jest config:init |
| Running tests | npm test or npx jest | yarn test or yarn jest |
If your project uses TypeScript 7, follow the supported side-by-side compiler setup
instead of installing typescript directly.
Built With
- TypeScript - JavaScript that scales
- Jest - Delightful JavaScript Testing
ts-jest- Jest transformer for TypeScript (yes,ts-jestuses itself for its tests)
Contributing
Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.
Versioning
We DO NOT use SemVer for versioning. Though you can think about SemVer when reading our version, except our major number follows the one of Jest. For the versions available, see the tags on this repository.
Authors/maintainers
- Kulshekhar Kabra - kulshekhar
- Gustav Wengel - GeeWee
- Ahn - ahnpnl
- Huafu Gandon - huafu
See also the list of contributors who participated in this project.
Supporters
- JetBrains has been kind enough to support ts-jest with a [license for open source] (https://www.jetbrains.com/community/opensource/?from=ts-jest).
License
This project is licensed under the MIT License - see the LICENSE.md file for details
Contributors
(top 30 of 178)
Similar repos
Languages
TypeScript
95.4%
JavaScript
3.4%
CSS
1.2%
A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.
7,073
stars
5,113
commits
TypeScript
primary language
Sep 11, 2026
updated
README
ts-jest
A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.
It supports all features of TypeScript including type-checking. Read more about Babel7 + preset-typescript vs TypeScript (and ts-jest).
We are not doing semantic versioning and 23.10 is a re-write, run npm i -D ts-jest@"<23.10.0" to go back to the previous version |
|---|
View the online documentation (usage & technical)
Ask for some help in the Jest Discord community or ts-jest GitHub Discussion
Before reporting any issues, be sure to check the troubleshooting page
We're looking for collaborators! Want to help improve ts-jest?
Getting Started
These instructions will get you setup to use ts-jest in your project. For more detailed documentation, please check online documentation.
| using npm | using yarn | |
|---|---|---|
| Prerequisites (TypeScript 4.3–6) | npm i -D jest typescript | yarn add --dev jest typescript |
| Installing | npm i -D ts-jest @types/jest | yarn add --dev ts-jest @types/jest |
| Creating config | npx ts-jest config:init | yarn ts-jest config:init |
| Running tests | npm test or npx jest | yarn test or yarn jest |
If your project uses TypeScript 7, follow the supported side-by-side compiler setup
instead of installing typescript directly.
Built With
- TypeScript - JavaScript that scales
- Jest - Delightful JavaScript Testing
ts-jest- Jest transformer for TypeScript (yes,ts-jestuses itself for its tests)
Contributing
Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.
Versioning
We DO NOT use SemVer for versioning. Though you can think about SemVer when reading our version, except our major number follows the one of Jest. For the versions available, see the tags on this repository.
Authors/maintainers
- Kulshekhar Kabra - kulshekhar
- Gustav Wengel - GeeWee
- Ahn - ahnpnl
- Huafu Gandon - huafu
See also the list of contributors who participated in this project.
Supporters
- JetBrains has been kind enough to support ts-jest with a [license for open source] (https://www.jetbrains.com/community/opensource/?from=ts-jest).
License
This project is licensed under the MIT License - see the LICENSE.md file for details
Similar repos
Contributors
(top 30 of 178)
Languages
TypeScript
95.4%
JavaScript
3.4%
CSS
1.2%