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A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.
| Date | Stars |
|---|---|
| 2026-07-24 | 7075 |
| 2026-07-25 | 7075 |
| 2026-07-28 | 7075 |
| 2026-07-30 | 7075 |
| 2026-08-06 | 7075 |
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<h1 align="center">ts-jest</h1> <p align="center">A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript.</p> <p align="center"> <a href="https://www.npmjs.com/package/ts-jest"><img src="https://img.shields.io/npm/v/ts-jest/latest.svg?style=flat-square" alt="NPM version" /> </a> <a href="https://www.npmjs.com/package/ts-jest"><img src="https://img.shields.io/npm/dm/ts-jest.svg?style=flat-square" alt="NPM downloads"/> </a> <a href="https://snyk.io/test/github/kulshekhar/ts-jest"><img src="https://snyk.io/test/github/kulshekhar/ts-jest/badge.svg?style=flat-square" alt="Known vulnerabilities"/> </a> <a href="https://coveralls.io/github/kulshekhar/ts-jest?branch=main"><img src="https://coveralls.io/repos/github/kulshekhar/ts-jest/badge.svg?branch=main" alt="Coverage status"/> </a> <a href="https://actions-badge.atrox.dev/kulshekhar/ts-jest/goto?ref=main"><img alt="GitHub actions" src="https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fkulshekhar%2Fts-jest%2Fbadge%3Fref%3Dmain&style=flat-square" /> </a> <a href="https://github.com/kulshekhar/ts-jest/blob/main/LICENSE.md"><img src="https://img.shields.io/npm/l/ts-jest.svg?style=flat-square" alt="GitHub license"/> </a> <a href="https://gurubase.io/g/ts-jest"><img src="https://img.shields.io/badge/Gurubase-Ask%20ts--jest%20Guru-006BFF?style=flat-square" alt="Gurubase"/> </a> </p> <img src="./icon.png" align="right" title="ts-jest Logo" width="128" height="128"> It supports all features of TypeScript including type-checking. [Read more about Babel7 + `preset-typescript` **vs** TypeScript (and `ts-jest`)](https://kulshekhar.github.io/ts-jest/docs/babel7-or-ts). --- | 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 | | ------------------------------------------------------------------------------------------------------------------------------------ | [<img src="./website/static/img/documentation.png" align="left" height="24"> View the online documentation (usage & technical)](https://kulshekhar.github.io/ts-jest) [<img src="./website/static/img/discord.svg" align="left" height="24"> Ask for some help in the `Jest` Discord community](https://discord.gg/j6FKKQQrW9) or [`ts-jest` GitHub Discussion](https://github.com/kulshekhar/ts-jest/discussions) [<img src="./website/static/img/troubleshooting.png" align="left" height="24"> Before reporting any issues, be sure to check the troubleshooting page](TROUBLESHOOTING.md) [<img src="./website/static/img/pull-request.png" align="left" height="24"> We're looking for collaborators! Want to help improve `ts-jest`?](https://github.com/kulshekhar/ts-jest/issues/223) --- ## Getting Started These instructions will get you setup to use `ts-jest` in your project. For more detailed documentation, please check [online documentation](https://kulshekhar.github.io/ts-jest). | | 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](website/docs/guides/typescript-7.md) instead of installing `typescript` directly. ## Built With - [TypeScript](https://www.typescriptlang.org/) - JavaScript that scales - [Jest](https://jestjs.io/) - Delightful JavaScript Testing - [`ts-jest`](https:
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