Package detail

ts-jest

kulshekhar65.9mMIT29.3.0

A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript

jest, typescript, sourcemap, react, testing

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 | 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 |

Built With

TypeScript - JavaScript that scales
Jest - Delightful JavaScript Testing
ts-jest - Jest transformer for TypeScript (yes, ts-jest uses 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 an open source license.

License

This project is licensed under the MIT License - see the LICENSE.md file for details

changelog

29.3.0 (2025-03-21)

Features

feat: support hybrid module values for isolatedModules: true (f372121)

Bug Fixes

fix: set customConditions to undefined in TsCompiler (b091d70), closes #4620

Code Refactoring

refactor: remove manual version checker (89458fc)
refactor: remove patching deps based on version checker (bac4c43)
refactor: deprecate RawCompilerOptions interface (2b1b6cd)
refactor: deprecate transform option isolatedModules (7dfef71)

DEPRECATIONS

RawCompilerOptions is deprecated in favor of TsConfigJson.CompilerOptions from type-fest
isolatedModules transform option is deprecated in favor of https://www.typescriptlang.org/tsconfig/#isolatedModules

29.2.6 (2025-02-22)

Bug Fixes

fix: escape dot for JS_TRANSFORM_PATTERN regex (8c91c60)
fix: escape dot for TS_JS_TRANSFORM_PATTERN regex (3eea850)
fix: escape dot for TS_TRANSFORM_PATTERN regex (80d3e4d), closes #4579

29.2.5 (2024-08-23)

Bug Fixes

build: build package with NodeNext module (9b3ade5)
fix: set value ts/tsx extensionsToTreatAsEsm in default esm preset (d9ff362)
fix(compiler): fallback to NodeJS module resolution for ts 4.8 (b7d3409), closes #4499

29.2.4 (2024-08-01)

Bug Fixes

fix: revert support implementation for Node16/NodeNext (70b9530), closes #4468 #4473

29.2.3 (2024-07-18)

Security Fixes

build(deps): Update dependency ejs to ^3.1.10 (de94a56)

Code Refactoring

refactor(presets): maintain preset codes inside src (8474fc2)

29.2.2 (2024-07-10)

Bug Fixes

fix(compiler): update memory cache after changing module value (94db43f), closes #4439

29.2.1 (2024-07-10)

Bug Fixes

fix: move ejs to dep instead of peerDep (26e31a7)
fix: set allowSyntheticDefaultImports properly (ff4b302), closes #4156
fix(compiler): support Node16/NodeNext value for target (2f5cc0c), closes #4198

29.2.0 (2024-07-08)

Bug Fixes

fix: don't show warning message with Node16/NodeNext (99c4f49), closes #4266

Features

feat(cli): allow migrating cjs presets to transform config (22fb027)
feat(presets): add util functions to create ESM presets (06f78ed), close #4200
feat(presets): add util functions to create CJS presets (f9cc3c0), close #4200

Code refactoring

refactor: replace lodash deps with native js implementation (40f1708)
refactor: use TsJestTransformerOptions type everywhere possibly (7d001be)
refactor(cli): use new preset util functions to initialize test config (c2b56ca)
refactor(presets): use create preset util functions for cjs presets (922d6d0)
test: switch react-app to use Vite (827c8ad)

DEPRECATIONS

refactor(cli): deprecate cli option babel (9617029). Please use CLI argument --js babel instead.
createJestPreset is deprecated. Please check documentation at https://kulshekhar.github.io/ts-jest/docs/getting-started/presets to see alternative solutions.

29.1.5 (2024-06-16)

Bug Fixes

build(deps-dev): bump braces (5560334), (59026b4), (0d9e359)

29.1.4 (2024-05-28)

Bug Fixes

fix(transformer): allow transforming of .cts/.mts extensions. (b8f6eaa), closes #3996

Features

feat: make cli generate esm config based on type: "module" (81a5f64), closes #4210 #4012

29.1.3 (2024-05-21)

Bug Fixes

add @jest/transform as an optional peer dependency (0ba7f86)
bring back Node 14 support (eda56a7)

Performance Improvements

remove ts resolved module cache file (4c88da5)

29.1.2 (2024-01-22)

Bug Fixes

calculated cache key based on supportsStaticESM (a5d6f2d)
correct error handling in processAsync (e7be4bf), closes #4207
use Config.ProjectConfig (918312b), closes #4028

29.1.1 (2023-06-23)

Security Fixes

bump semver to 7.5.3

29.1.0 (2023-03-26)

Features

Support TypeScript 5.x (#4064) (db98cc9), closes #4048

29.0.5 (2023-01-13)

Reverts

Revert "fix(transformer): don't use cache when tsJestConfig is different (#3966)" (185eb18), closes #3966

29.0.4 (2023-01-10)

Bug Fixes

transformer: don't use cache when tsJestConfig is different (#3966) (a445638)
bump json5 to 2.2.3 (#3976)(b9f7809)

29.0.3 (2022-09-28)

Bug Fixes

merge config from globals with transformer config correctly (#3842) (9c9fd60), closes #3841
presets: allow merging transform config when using presets (#3833) (afc6a94)

Features

add useESM option to pathsToModuleNameMapper options (#3792) (eabe906)

29.0.2 (2022-09-23)

Bug Fixes

mark ts-jest as optional in ConfigGlobals (#3816) (cbb88bb), closes #3815
use correct typings for config:init command (#3825) (21b94db)

29.0.1 (2022-09-13)

Bug Fixes

legacy: include existing globals config in cached config (#3803) (e79be47)

Features

add typings for ts-jest options via transform config (#3805) (664b0f2)

29.0.0 (2022-09-08)

Features

drop Node 12 and Node 17 support (#3787) (0f1de16)
migrate globals config to transformer config (#3780) (31e5843)
support Jest 29 (#3767) (94b553b)

DEPRECATIONS

Define ts-jest config under globals is now deprecated. Please define the config via transformer config instead.

BREAKING CHANGES

Only Node 14, 16 and 18 are supported
Jest 29 is required.

29.0.0-next.1 (2022-09-02)

Features

drop Node 12 and Node 17 support (#3787) (0f1de16)
migrate globals config to transformer config (#3780) (31e5843)

DEPRECATIONS

Define ts-jest config under globals is now deprecated. Please define the config via transformer config instead.

BREAKING CHANGES

Only Node 14, 16 and 18 are supported

29.0.0-next.0 (2022-08-28)

Features

support Jest 29 (#3767) (94b553b)

BREAKING CHANGES

Jest 29 is required.

28.0.8 (2022-08-14)

Bug Fixes

allow .mts to be processed (#3713) (effae71), closes #3702

28.0.7 (2022-07-15)

Bug Fixes

update @jest/types to be an optional peer dependency (#3690) (8a8c3fa), closes #3689

28.0.6 (2022-07-13)

Bug Fixes

config: don't show diagnostics warning with diagnostics: false (#3647) (9a9bc02), closes #3638
legacy: add useCaseSensitiveFileNames wherever needed (#3683) (c40bc34), closes #3665
set @jest/types as peer dependency (#3633) (24567e1)

28.0.5 (2022-06-11)

Bug Fixes

legacy: throw type check error in ESM mode with reject (#3618) (7dd01ff), closes #3507

28.0.4 (2022-06-02)

Bug Fixes

remove @types/jest from peer deps (#3592) (b66b656)

28.0.3 (2022-05-23)

Bug Fixes

security: update version of json5 (#3528) (b31f5ba)

28.0.2 (2022-05-07)

Bug Fixes

transformers: use Array.sort in hoisting transformer (#3498) (e400a6e), closes #3476

28.0.1 (2022-05-03)

Bug Fixes

lower the required node version to ^16.10 (#3495) (3a4e48a), closes #3494

28.0.0 (2022-05-02)

Bug Fixes

legacy invoke Babel processAsync for babel-jest in ESM mode instead of process (#3430) (0d7356c)

Features

presets: add presets for legacy mode (#3465) (543b4ad)
mark ConfigSet as legacy (#3456) (a986729)
mark TsCompiler and TsJestCompiler as legacy (#3457) (0f2fe30)
remove path-mapping AST transformer (#3455) (f566869)
set Jest peer dependencies to v28 (#3454) (1e880ff)
core: drop support for Node.js 10 (#3332) (7a9aa61)
core: remove mocked testing util (#3333) (2d9017d)
core: remove ts-jest/utils sub path export (#3334) (9f253d3)
mark TsJestTransformer as legacy (#3451) (b090179)

BREAKING CHANGES

path-mapping AST transformer is no longer shipped in ts-jest v28. Please use an alternative one like https://github.com/LeDDGroup/typescript-transform-paths instead.
Any imports ts-jest/dist/compiler/ts-compiler should change to ts-jest/dist/legacy/compiler/ts-compiler
Any imports ts-jest/dist/compiler/ts-jest-compiler should change to ts-jest/dist/legacy/compiler/ts-jest-compiler
Any imports ts-jest/dist/config/config-set should change to ts-jest/dist/legacy/config/config-set
Minimum support TypeScript version is now 4.3 since Jest 28 requires it.
Jest 28 is required.
core: Any imports ts-jest/utils should be replaced with ts-jest.
core: Starting from Jest 27.4, mocked has been integrated into Jest repo.
core: Support for Node.js v10 has been removed as Jest drops support for it.

27.1.5 (2022-05-17)

Bug Fixes

transformers use Array.sort in hoisting transformer (#3498) (e400a6e), fixes #3476

27.1.4 (2022-03-24)

Bug Fixes

compiler: revert #3194 (#3362) (2b7dffe), closes #3272
remove esbuild from peer dependency (#3360) (8c8c1ca), closes #3346
support Babel config file with .cjs extension (#3361) (5e5ac4a), closes #3335

27.1.3 (2022-01-14)

Bug Fixes

compiler: update memory cache for compiler using received file content (#3194) (e4d9541)

27.1.2 (2021-12-15)

Bug Fixes

stimulate esbuild type to avoid importing esbuild directly (#3147) (9ace0a9)

27.1.1 (2021-12-07)

Bug Fixes

bring back afterProcess hook (#3132) (2b6b86e)
make esbuild as optional peer dependency (#3129) (20258de)

27.1.0 (2021-11-30)

Features

allow subclasses to extend processAsync and getCacheKeyAsync (#3047) (571a880)
config: support custom AST transformers written in TypeScript (#3063) (340a305), closes #2831
export ts-jest public apis from index.js (#3080) (53175dd), closes #3045

Code Refactoring

utils: deprecate mocked util function (#3102) (55e69f1)
define clear type for compiler option (#3087) (cc42daf)
transformers: deprecate path-mapping AST transformer (#3088) (d8f6b96)
transformers: use ts factory API for hoisting AST transformer (#3058) (a72f51d)

DEPRECATIONS

transformers: path-mapping AST transformer is deprecated and will be removed in v28.0.0. One should use an alternative one like https://github.com/LeDDGroup/typescript-transform-paths instead.
utils: mocked function is deprecated and will be removed in v28.0.0. The function has been integrated into jest-mock package as a part of Jest 27.4.0, see https://github.com/facebook/jest/pull/12089. One should use the one from Jest instead

27.0.7 (2021-10-16)

Bug Fixes

correct lodash import (#2978) (8b60679), closes #2977

27.0.6 (2021-10-14)

Bug Fixes

use specific lodash package instead of full package lodash (#2959) (dc89fe5), closes #2954

27.0.5 (2021-08-14)

Bug Fixes

cli: add migration tsConfig option for ts-jest config options (#2794) (781710b), closes #2764
cli: fix config:init genarate invalid type comment (#2773) (ede8a20), closes #2772
config: handle ./ in tsconfig paths for pathsToModuleNameMapper (#2797) (42ff5e4), closes #2709

Code Refactoring

use native Buffer.from and mkdird (#2774) (4869660)

27.0.4 (2021-07-21)

Bug Fixes

add @types/jest as optional peerDependencies to solve yarn 2 (#2756) (5fbf43e)
add babel-jest as optional peerDependencies to solve yarn 2 (#2751) (8bede2e)
config: include AST transformer's name and version into cache key (#2755) (310fb9a), closes #2753

Features

link jest config types on npx ts-jest:init (#2742) (f51ba05)
set env var TS_JEST to allow detecting of ts-jest (#2717) (56c137a), closes #2716

27.0.3 (2021-06-06)

Bug Fixes

revert exports field to support all node versions (#2658) (132c8ba)

Features

emit ESM codes if using ESM mode with Babel (#2661) (9b55404), closes #2650

27.0.2 (2021-05-30)

Bug Fixes

compiler: add empty string file content to compiler cache (#2633) (0feb556), closes #2625
config: exclude should only exclude files which match glob values (#2637) (c5ce979), closes #2634

27.0.1 (2021-05-26)

Bug Fixes

cli: keep testMatch if old jest config contains it (#2618) (c568f49), closes #2616
compiler: make sure isolatedModules: false use updated compiler options (#2628) (348e30f), closes #2629
add missing export presets (#2624) (0ea025e), closes #2623

27.0.0 (2021-05-25)

Bug Fixes

compiler: return file content on emitSkipped for non ts/tsx files (#2519) (a4e5640), closes #2513
compiler: retype check other files if processing file is used by those ones in watch mode (#2481) (ac8f3d0), closes #943
compiler: initialize compiler with .ts/.tsx/.d.ts files only (#2458) (a89f0e2), closes #2445
compiler: resolve nested imported modules for each processing file (#2436) (3cb9019), closes #1390 #1747
config: create fallback jest config when jest config is undefined (#2433) (c6d6e4c), closes #2085
remove @types/jest from direct dep (#2409) (8913120), closes #2406 #2411
compiler: return original file content and show warning on emit skip (#2410) (c2b2164), closes #2407
compiler: type check correctly in watch mode when a file content itself has changed (#2405) (064bf3a), closes #2118
compiler: exclude files in outDir from compiler source files (#2375) (ec68c74), closes #2350 #2374
config: cache config and compiler correctly between runs (#2356) (5f91336)
config: improve emit skipped error message (#2358) (2ae8df4), closes #2350
typings: set correct typing for tsconfig option (#2383) (584324a), closes #2368
config: invalidate Jest transform cache when astTransformers value changes (#2345) (d726016)
reduce size of node_modules when adding ts-jest (#2263) (8e0675c)

Features

config: allow disable sourcemap (#2544) (47da6ad)
compiler: expose TsCompiler as public api (#2344) (871cd6a)
config: support typed config options for jest config typescript (#2335) (3cfc37b)
presets: add typing for presets entry point (#2337) (1a3058f)
compiler: allow custom transformers to access internal Program (#2299) (387964f)
config: replace pathRegex with exclude (#2295) (f2f99c3)
config: type checking js files based on checkJs (#2283) (1e04433)
compiler: support ESM for isolatedModules: false (#2269) (9bb0c05), closes #1709
compiler: support ESM for isolatedModule: true (#2219) (e101db0), closes #1709
presets: add 3 new presets to work with ESM (#2207) (c277858)
allow subclasses of TsJestTransformer to have version checking (#2176) (ca8d7c4)

Performance Improvements

reuse jest file system cache for isolatedModules: false (#2189) (68f446b)

Code Refactoring

config: remove support for astTransformers string array (#2129) (1e0b2ce)
config: remove support for packageJson option (#2128) (05916b9)
move jest transformer class to package entry (#2122) (5bbfd06)
config: remove support for tsConfig option (#2127) (3cc9b80)

BREAKING CHANGES

By default, ts-jest will use sourceMap option from your tsconfig. If users want to have sourcemap on, they need to set sourceMap: true in tsconfig.
follow Jest support Node engines (#2478) (1fecf7f)
add exports field to package.json, see https://nodejs.org/api/packages.html#packages_package_entry_points (#2467) (d3aba3e)
ts-jest custom AST transformer function signature has changed to ` import type { TsCompilerInstance } from 'ts-jest/dist/types'

export function factory(compilerInstance: TsCompilerInstance) { //... }

* One is currently using `pathRegex` should use `exclude` with `glob` patterns.
* If one currently relies on type check for `js` files, please set `checkJs: true` in your tsconfig.
* Now both `isolatedModules: true` and `isolatedModule: false` codes are in one single class `TsCompiler` which is an instance created in `TsJestCompiler` based on config option `compiler` with value `typescript` or `ttypescript`.
* **config:** `packageJson` config option is not used in internal `ts-jest` so this option is now removed.
* **config:** One is defining ast transformers in `jest.config.js`/`package.json` should change to

// jest.config.js module.exports = { //... globals: { 'ts-jest': { astTransformers: { before: ['your_before_transformer_path'], after: ['your_after_transformer_path'], afterDeclarations: ['your_afterDeclarations_transformer_path'], } } } }

or

// package.json { "jest": { "globals": { "ts-jest": { "astTransformers": { "before": ["your_before_transformer_path"], "after": ["your_after_transformer_path"], "afterDeclarations": ["your_afterDeclarations_transformer_path"] } } } } }

* One currently refers type in `jest.config.js`

/** @typedef {import('ts-jest')} */ module.exports = { //... }


should change to

/** @typedef {import('ts-jest/dist/types')} */ module.exports = { //... }

* Remove possibilities to import `mocked`, `createJestPreset`, `pathsToModuleNameMapper` from package entry. One should change to

import { mocked, createJestPreset, pathsToModuleNameMapper } from 'ts-jest/utils'

* **config:** One currently uses `tsConfig` should change to `tsconfig` in your `jest.config.js` or `package.json`.



## [26.5.6](https://github.com/kulshekhar/ts-jest/compare/v26.5.5...v26.5.6) (2021-05-05)


### Code Refactoring

* refactor(config): show warning message for `sourceMap: false` ([#2557](https://github.com/kulshekhar/ts-jest/pull/2557)) ([cf60990](https://github.com/kulshekhar/ts-jest/commit/cf609900e2c5937755123bd08ca2c5f2ff5e0651)).



# [27.0.0-next.12](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.11...v27.0.0-next.12) (2021-05-05)


### Features

* **config:** allow disable sourcemap ([#2544](https://github.com/kulshekhar/ts-jest/issues/2544)) ([47da6ad](https://github.com/kulshekhar/ts-jest/commit/47da6ada5089e58e9bc68ce8e9bc9e17aaa127ae))


## BREAKING CHANGES

* By default, `ts-jest` will use `sourceMap` option from your `tsconfig`. If users want to have sourcemap on, they need to either remove `sourceMap` or set `sourceMap: true` in `tsconfig`



## [26.5.5](https://github.com/kulshekhar/ts-jest/compare/v26.5.4...v26.5.5) (2021-04-15)


### Bug Fixes

* **compiler:** return file content on emitSkipped for non ts/tsx files ([#2515](https://github.com/kulshekhar/ts-jest/issues/2515)) ([0320fb3](https://github.com/kulshekhar/ts-jest/commit/0320fb3ac22056aafe4d7ae966eab84dbf23fda9)), closes [#2513](https://github.com/kulshekhar/ts-jest/issues/2513)



# [27.0.0-next.11](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.10...v27.0.0-next.11) (2021-04-15)


### Bug Fixes

* **compiler:** return file content on emitSkipped for non ts/tsx files ([#2519](https://github.com/kulshekhar/ts-jest/issues/2519)) ([a4e5640](https://github.com/kulshekhar/ts-jest/commit/a4e5640f54a7810c9b7aba32663ce4a53893d22f)), closes [#2513](https://github.com/kulshekhar/ts-jest/issues/2513)



# [27.0.0-next.10](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.9...v27.0.0-next.10) (2021-03-30)


### Bug Fixes

* **compiler:** retype check other files if processing file is used by those ones in watch mode ([#2481](https://github.com/kulshekhar/ts-jest/issues/2481)) ([ac8f3d0](https://github.com/kulshekhar/ts-jest/commit/ac8f3d025de67bfc2708a8422ee657fc42455513)), closes [#943](https://github.com/kulshekhar/ts-jest/issues/943)


## BREAKING CHANGES

* follow Jest node engines ([#2478](https://github.com/kulshekhar/ts-jest/pull/2478)) ([1fecf7f](https://github.com/kulshekhar/ts-jest/commit/1fecf7ff92a5f1a0cc6ea1d27026f9f54a3d5ead))
* add `exports` field to `package.json`, see https://nodejs.org/api/packages.html#packages_package_entry_points ([#2467](https://github.com/kulshekhar/ts-jest/pull/2467)) ([d3aba3e](https://github.com/kulshekhar/ts-jest/commit/d3aba3e103f85b3a42d0e2ecaea9d3457917319e))



# [27.0.0-next.9](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.8...v27.0.0-next.9) (2021-03-19)


### Bug Fixes

* **compiler:** initialize compiler with `.ts`/`.tsx`/`.d.ts` files only ([#2458](https://github.com/kulshekhar/ts-jest/issues/2458)) ([a89f0e2](https://github.com/kulshekhar/ts-jest/commit/a89f0e2061e01440337dde4134639ff6a2d69936)), closes [#2445](https://github.com/kulshekhar/ts-jest/issues/2445)



## [26.5.4](https://github.com/kulshekhar/ts-jest/compare/v26.5.3...v26.5.4) (2021-03-17)


### Bug Fixes

* **compiler:** initialize compiler with `.ts`/`.tsx`/`.d.ts` files only ([#2457](https://github.com/kulshekhar/ts-jest/issues/2457)) ([1dc731a](https://github.com/kulshekhar/ts-jest/commit/1dc731a5faf7cda59db1cc642eb99fae973b1246)), closes [#2445](https://github.com/kulshekhar/ts-jest/issues/2445)



# [27.0.0-next.8](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.7...v27.0.0-next.8) (2021-03-11)


### Bug Fixes

* **compiler:** resolve nested imported modules for each processing file ([#2436](https://github.com/kulshekhar/ts-jest/issues/2436)) ([3cb9019](https://github.com/kulshekhar/ts-jest/commit/3cb9019289bb64deecffaf52e840faf6a4656092)), closes [#1390](https://github.com/kulshekhar/ts-jest/issues/1390) [#1747](https://github.com/kulshekhar/ts-jest/issues/1747)
* **config:** create fallback jest config when jest config is `undefined` ([#2433](https://github.com/kulshekhar/ts-jest/issues/2433)) ([c6d6e4c](https://github.com/kulshekhar/ts-jest/commit/c6d6e4cd534e1c368fcb7141784ee43584525ca4)), closes [#2085](https://github.com/kulshekhar/ts-jest/issues/2085)
* remove `@types/jest` from direct dep ([#2409](https://github.com/kulshekhar/ts-jest/issues/2409)) ([8913120](https://github.com/kulshekhar/ts-jest/commit/89131203c358c8f9e89655800e500a9e88a17334)), closes [#2406](https://github.com/kulshekhar/ts-jest/issues/2406) [#2411](https://github.com/kulshekhar/ts-jest/issues/2411)
* **compiler:** return original file content and show warning on emit skip ([#2410](https://github.com/kulshekhar/ts-jest/issues/2410)) ([c2b2164](https://github.com/kulshekhar/ts-jest/commit/c2b2164ddd1e606fc2490326244a6efc63f6c4a0)), closes [#2407](https://github.com/kulshekhar/ts-jest/issues/2407)
* **compiler:** type check correctly in watch mode when a file content itself has changed ([#2405](https://github.com/kulshekhar/ts-jest/issues/2405)) ([064bf3a](https://github.com/kulshekhar/ts-jest/commit/064bf3a73e9a304aa9366d27db8973b68be23ffd)), closes [#2118](https://github.com/kulshekhar/ts-jest/issues/2118)



## [26.5.3](https://github.com/kulshekhar/ts-jest/compare/v26.5.2...v26.5.3) (2021-03-03)


### Bug Fixes

* **config:** create fallback jest config when jest config is undefined ([#2421](https://github.com/kulshekhar/ts-jest/issues/2421)) ([0fb6b45](https://github.com/kulshekhar/ts-jest/commit/0fb6b45e7dc3dd7588d27f09ac9a8849dff470cb)), closes [#2085](https://github.com/kulshekhar/ts-jest/issues/2085)
* remove `@types/jest` from direct dep ([#2416](https://github.com/kulshekhar/ts-jest/issues/2416)) ([060302e](https://github.com/kulshekhar/ts-jest/commit/060302ed1eb8708df0acd7ab1d613ff06fc08cf3)), closes [#2406](https://github.com/kulshekhar/ts-jest/issues/2406) [#2411](https://github.com/kulshekhar/ts-jest/issues/2411)
* **compiler:** return original file content on emit skip ([#2408](https://github.com/kulshekhar/ts-jest/issues/2408)) ([cfba8f4](https://github.com/kulshekhar/ts-jest/commit/cfba8f423dd59536d8b1e1374ef2b20bff2ed857)), closes [#2407](https://github.com/kulshekhar/ts-jest/issues/2407)



# [27.0.0-next.7](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.6...v27.0.0-next.7) (2021-02-24)


### Bug Fixes

* **compiler:** exclude files in `outDir` from compiler source files ([#2375](https://github.com/kulshekhar/ts-jest/issues/2375)) ([ec68c74](https://github.com/kulshekhar/ts-jest/commit/ec68c74bccf56d682a7ed9e5c48ea676dcf3fbf9)), closes [#2350](https://github.com/kulshekhar/ts-jest/issues/2350) [#2374](https://github.com/kulshekhar/ts-jest/issues/2374)
* **config:** cache config and compiler correctly between runs ([#2356](https://github.com/kulshekhar/ts-jest/issues/2356)) ([5f91336](https://github.com/kulshekhar/ts-jest/commit/5f91336b9023da1051cc85b509ad02c525679fcb))
* **config:** improve emit skipped error message ([#2358](https://github.com/kulshekhar/ts-jest/issues/2358)) ([2ae8df4](https://github.com/kulshekhar/ts-jest/commit/2ae8df4515d6f6e975e57719a89184b5583f9e2f)), closes [#2350](https://github.com/kulshekhar/ts-jest/issues/2350)
* **typings:** set correct typing for `tsconfig` option ([#2383](https://github.com/kulshekhar/ts-jest/issues/2383)) ([584324a](https://github.com/kulshekhar/ts-jest/commit/584324a60c0784275e9bf8bcfd0814735a250d24)), closes [#2368](https://github.com/kulshekhar/ts-jest/issues/2368)



## [26.5.2](https://github.com/kulshekhar/ts-jest/compare/v26.5.1...v26.5.2) (2021-02-21)


### Bug Fixes

* **compiler:** exclude files in `outDir` from compiler source files ([#2376](https://github.com/kulshekhar/ts-jest/issues/2376)) ([9034677](https://github.com/kulshekhar/ts-jest/commit/9034677f9ce0968339d3d942a70e888996fac532)), closes [#2350](https://github.com/kulshekhar/ts-jest/issues/2350) [#2374](https://github.com/kulshekhar/ts-jest/issues/2374)
* **config:** define `matchTestFilePath` before `setupTsJestCfg` ([#2373](https://github.com/kulshekhar/ts-jest/issues/2373)) ([c427fea](https://github.com/kulshekhar/ts-jest/commit/c427fea48a24b5ce6e8b9260d3c322583b062a77)), closes [#2371](https://github.com/kulshekhar/ts-jest/issues/2371)
* **config:** improve emit skipped error message ([#2357](https://github.com/kulshekhar/ts-jest/issues/2357)) ([f2808bb](https://github.com/kulshekhar/ts-jest/commit/f2808bb0b15231c67ccb9a97ed606741213c03e6))
* **typings:** set correct typing for `tsconfig`/`tsConfig` option ([#2377](https://github.com/kulshekhar/ts-jest/issues/2377)) ([d4f6aff](https://github.com/kulshekhar/ts-jest/commit/d4f6aff3f181761bf25c64ff1a97dd19a69196f9)), closes [#2368](https://github.com/kulshekhar/ts-jest/issues/2368)


# [27.0.0-next.6](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.5...v27.0.0-next.6) (2021-02-11)


### Bug Fixes

* **config:** invalidate Jest transform cache when `astTransformers` value changes ([#2345](https://github.com/kulshekhar/ts-jest/issues/2345)) ([d726016](https://github.com/kulshekhar/ts-jest/commit/d726016a17a26215fad782cf57bb9b9bec807307))


### Features

* **compiler:** expose `TsCompiler` as public api ([#2344](https://github.com/kulshekhar/ts-jest/issues/2344)) ([871cd6a](https://github.com/kulshekhar/ts-jest/commit/871cd6a3abb10569a04d05f72bbb41c952665ed4))
* **config:** support typed config options for jest config typescript ([#2335](https://github.com/kulshekhar/ts-jest/issues/2335)) ([3cfc37b](https://github.com/kulshekhar/ts-jest/commit/3cfc37b1eba125fe861cea0415095dbe1f538520))
* **presets:** add typing for `presets` entry point ([#2337](https://github.com/kulshekhar/ts-jest/issues/2337)) ([1a3058f](https://github.com/kulshekhar/ts-jest/commit/1a3058f3b7f8a2e377cb6a7e829cea310a06d4fa))



## [26.5.1](https://github.com/kulshekhar/ts-jest/compare/v26.5.0...v26.5.1) (2021-02-09)


### Features

* **config:** support typed config options for jest config typescript ([#2336](https://github.com/kulshekhar/ts-jest/issues/2336)) ([f4f5d32](https://github.com/kulshekhar/ts-jest/commit/f4f5d3205d1c80e545a32c02c6a66e7e91386f7f))
* **presets:** add typing for `presets` entry point ([#2341](https://github.com/kulshekhar/ts-jest/issues/2341)) ([e12b004](https://github.com/kulshekhar/ts-jest/commit/e12b004dcc5848d5ae0638e885147c54e11cc72b)), closes [#2325](https://github.com/kulshekhar/ts-jest/issues/2325)



# [27.0.0-next.5](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.4...v27.0.0-next.5) (2021-02-04)


### Features

* **compiler:** allow custom transformers to access internal `Program` ([#2299](https://github.com/kulshekhar/ts-jest/issues/2299)) ([387964f](https://github.com/kulshekhar/ts-jest/commit/387964faed14ce24d2cf8170a04eee244d69b8b9))


### BREAKING CHANGES

`ts-jest` custom AST transformer function signature has changed to

import type { TsCompilerInstance } from 'ts-jest/dist/types'

export function factory(compilerInstance: TsCompilerInstance) { //... }




# [26.5.0](https://github.com/kulshekhar/ts-jest/compare/v26.5.0...v26.4.4) (2021-01-29)


### Bug Fixes

* reduce size of `node_modules` when adding `ts-jest` ([#2309](https://github.com/kulshekhar/ts-jest/issues/2309)) ([6bf2e8a](https://github.com/kulshekhar/ts-jest/commit/b8d5d2090567f23947d9efd87f5f869b16bf2e8a))


### Features

* introduce `exclude` to exclude files from diagnostics ([#2308](https://github.com/kulshekhar/ts-jest/issues/2308)) ([cd82fd3](https://github.com/kulshekhar/ts-jest/commit/0c555c250774a7fd9e356cf20a3d8b693cd82fd3))


### DEPRECATIONS

* **config**: deprecate `pathRegex` in favor of `exclude` ([#2308](https://github.com/kulshekhar/ts-jest/issues/2308)) ([cd82fd3](https://github.com/kulshekhar/ts-jest/commit/0c555c250774a7fd9e356cf20a3d8b693cd82fd3))



# [27.0.0-next.4](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.3...v27.0.0-next.4) (2021-01-22)


### Features

* **config:** replace `pathRegex` with `exclude` ([#2295](https://github.com/kulshekhar/ts-jest/issues/2295)) ([f2f99c3](https://github.com/kulshekhar/ts-jest/commit/f2f99c3a46ac18a1fd6cc98922329b71a7e8c4e8))
* **config:** type checking `js` files based on `checkJs` ([#2283](https://github.com/kulshekhar/ts-jest/issues/2283)) ([1e04433](https://github.com/kulshekhar/ts-jest/commit/1e044335a38907ff5c06eb43efeb2e5fd9769a0c))


### BREAKING CHANGES

* One is currently using `pathRegex` should use `exclude` with Glob patterns.
* If one currently relies on type check for `js` files, please set `checkJs: true` in your tsconfig



# [27.0.0-next.3](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-next.2...v27.0.0-next.3) (2021-01-14)


### Bug Fixes

* reduce size of node_modules when adding ts-jest ([#2263](https://github.com/kulshekhar/ts-jest/issues/2263)) ([8e0675c](https://github.com/kulshekhar/ts-jest/commit/8e0675c02b6095af6656df50c8782c01ad9e87a3))


### Features

* **compiler:** support ESM for `isolatedModules: false` ([#2269](https://github.com/kulshekhar/ts-jest/issues/2269)) ([9bb0c05](https://github.com/kulshekhar/ts-jest/commit/9bb0c054a3a7bd8949b0c12b2bb42348f69e2e2e)), closes [#1709](https://github.com/kulshekhar/ts-jest/issues/1709)



# [27.0.0-next.2](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-alpha.1...v27.0.0-next.2) (2020-12-17)


### Bug Fixes

* redo type checking when type has changed in watch mode ([#2167](https://github.com/kulshekhar/ts-jest/issues/2167)) ([ec70365](https://github.com/kulshekhar/ts-jest/commit/ec7036517ac218c2dc9cc20f5127025d21d5ada6)), closes [#2118](https://github.com/kulshekhar/ts-jest/issues/2118) [#1122](https://github.com/kulshekhar/ts-jest/issues/1122) [#943](https://github.com/kulshekhar/ts-jest/issues/943)


### Features

* **compiler:** allow `isolatedModule: true` to have ESM support ([#2219](https://github.com/kulshekhar/ts-jest/issues/2219)) ([e101db0](https://github.com/kulshekhar/ts-jest/commit/e101db01095ce75ce9a48e27a1d9bf84bb8e19ee)), closes [#1709](https://github.com/kulshekhar/ts-jest/issues/1709)
* **presets:** add 3 new presets to work with ESM ([#2207](https://github.com/kulshekhar/ts-jest/issues/2207)) ([c277858](https://github.com/kulshekhar/ts-jest/commit/c277858c7820d8873c2d7d0c6e3704a47868d600))
* allow subclasses of `TsJestTransformer` to have version checking ([#2176](https://github.com/kulshekhar/ts-jest/issues/2176)) ([ca8d7c4](https://github.com/kulshekhar/ts-jest/commit/ca8d7c44779105ef208d17cdd8c6baaf96b479ad))
* support jest 27 ([#2171](https://github.com/kulshekhar/ts-jest/issues/2171)) ([9909b9d](https://github.com/kulshekhar/ts-jest/commit/9909b9d6b6c72b4c64d2d0ff46f142b2a65a7eae))


### Performance Improvements

* reuse jest file system cache for `isolatedModules: false` ([#2189](https://github.com/kulshekhar/ts-jest/issues/2189)) ([68f446b](https://github.com/kulshekhar/ts-jest/commit/68f446b8351bb8925ac4822aa631aa6b23f2f711))



# [27.0.0-alpha.1](https://github.com/kulshekhar/ts-jest/compare/v27.0.0-alpha.0...v27.0.0-alpha.1) (2020-11-26)


### BREAKING CHANGES

* Now both `isolatedModules: true` and `isolatedModule: false` codes are in one single class `TsCompiler` which is an instance created in `TsJestCompiler` based on config option `compiler` with value `typescript` or `ttypescript`.




# [27.0.0-alpha.0](https://github.com/kulshekhar/ts-jest/compare/v26.4.4...v27.0.0-alpha.0) (2020-11-11)


### Code Refactoring

* **config:** remove support for `astTransformers` string array ([#2129](https://github.com/kulshekhar/ts-jest/issues/2129)) ([1e0b2ce](https://github.com/kulshekhar/ts-jest/commit/1e0b2ce5599a35c108712456e455bf29c8c5fd24))
* **config:** remove support for `packageJson` option ([#2128](https://github.com/kulshekhar/ts-jest/issues/2128)) ([05916b9](https://github.com/kulshekhar/ts-jest/commit/05916b920160da5b43a20b47025eea43b4a1a5c3))
* move jest transformer class to package entry ([#2122](https://github.com/kulshekhar/ts-jest/issues/2122)) ([5bbfd06](https://github.com/kulshekhar/ts-jest/commit/5bbfd06a0c114dbecd75b763bcfa76d4a6203ab1))
* **config:** remove support for `tsConfig` option ([#2127](https://github.com/kulshekhar/ts-jest/issues/2127)) ([3cc9b80](https://github.com/kulshekhar/ts-jest/commit/3cc9b806be2b2096b981253d39ca40df65bb0f7b))


### BREAKING CHANGES

* **config:** `packageJson` config option is not used in internal `ts-jest` so this option is now removed
* **config:** One is defining ast transformers in `jest.config.js`/`package.json` should change to

or

- One currently refers type in `jest.config.js`

/** @typedef {import('ts-jest')} */ module.exports = { //... }


should change to

/** @typedef {import('ts-jest/dist/types')} */ module.exports = { //... }


- Remove possibilities to import `mocked`, `createJestPreset`, `pathsToModuleNameMapper` from package entry. One should change to

import { mocked, createJestPreset, pathsToModuleNameMapper` } from 'ts-jest/utils'

* **config:** One currently uses `tsConfig` should change to `tsconfig` in your `jest.config.js` or `package.json`



## [26.4.4](https://github.com/kulshekhar/ts-jest/compare/v26.4.3...v26.4.4) (2020-11-08)


### Bug Fixes

* revert usage of `@jest/create-cache-key-function` ([#2108](https://github.com/kulshekhar/ts-jest/issues/2108)) ([dee8231](https://github.com/kulshekhar/ts-jest/commit/dee823172ce1e8eb9e0b2dd3aeed1ab4033bd0d9)), closes [#2080](https://github.com/kulshekhar/ts-jest/issues/2080) [#2090](https://github.com/kulshekhar/ts-jest/issues/2090) [#2104](https://github.com/kulshekhar/ts-jest/issues/2104)


### Features

* **testing:** expose all types for util `mocked` ([#2096](https://github.com/kulshekhar/ts-jest/issues/2096)) ([b1d072b](https://github.com/kulshekhar/ts-jest/commit/b1d072b52b9a7665b3a6914b0895f84f6ee3f8c0)), closes [#2086](https://github.com/kulshekhar/ts-jest/issues/2086)



## [26.4.3](https://github.com/kulshekhar/ts-jest/compare/v26.4.2...v26.4.3) (2020-10-26)


### Bug Fixes

* **compiler:** only exclude test files when initializing compiler ([#2062](https://github.com/kulshekhar/ts-jest/issues/2062)) ([7264c13](https://github.com/kulshekhar/ts-jest/commit/7264c137114b6dd895624e3476dd7ec57b64ee13)), closes [#2061](https://github.com/kulshekhar/ts-jest/issues/2061), [#2068](https://github.com/kulshekhar/ts-jest/issues/2068), [#2072](https://github.com/kulshekhar/ts-jest/issues/2072), [#2073](https://github.com/kulshekhar/ts-jest/issues/2073)
* **config:** resolve `.babelrc` file path before attempting to read it ([#2071](https://github.com/kulshekhar/ts-jest/issues/2071)) ([681bfef](https://github.com/kulshekhar/ts-jest/commit/681bfef41744f09cd50b71072f4d001cb58da82e)), closes [#2064](https://github.com/kulshekhar/ts-jest/issues/2064)


### Features

* **config:** allow to override resolve tsconfig behavior ([#2063](https://github.com/kulshekhar/ts-jest/issues/2063)) ([9f46ace](https://github.com/kulshekhar/ts-jest/commit/9f46acefceb1fa71ee2e8b3b3c172ceb0544b4c4))



## [26.4.2](https://github.com/kulshekhar/ts-jest/compare/v26.4.1...v26.4.2) (2020-10-23)


### Features

* **config:** expose several typings as public apis ([#2054](https://github.com/kulshekhar/ts-jest/issues/2054)) ([3b6b705](https://github.com/kulshekhar/ts-jest/commit/3b6b7055e2b9c74e81fb91596c807ace02ab77a1))


### Performance Improvements

* **compiler:** speed up bootstrap time for `isolatedModules:false` ([#2055](https://github.com/kulshekhar/ts-jest/issues/2055)) ([230b5dd](https://github.com/kulshekhar/ts-jest/commit/230b5ddbee55357d25dd190cd45aa8a30d7f31e0))


### DEPRECATIONS

* **config**: deprecate `tsConfig` in favor of `tsconfig` ([#1997](https://github.com/kulshekhar/ts-jest/pull/1997))
* **config**: deprecate `packageJson` since internal codes don't use it anymore ([#2034](https://github.com/kulshekhar/ts-jest/pull/2034))



## [26.4.1](https://github.com/kulshekhar/ts-jest/compare/v26.4.0...v26.4.1) (2020-09-29)


### Bug Fixes

* **utils:** `MaybeMockedConstructor` returns T ([#1976](https://github.com/kulshekhar/ts-jest/issues/1976)) ([b7712b2](https://github.com/kulshekhar/ts-jest/commit/b7712b2055d8f32dd97999de1d94e8f3515d79e8))
* **utils:** revert `path.join` and add check on prefix ends with `/` ([#1989](https://github.com/kulshekhar/ts-jest/issues/1989)) ([3d9035b](https://github.com/kulshekhar/ts-jest/commit/3d9035bd70dc087d4c5a943bb2fe2af2d0822875)), closes [#1982](https://github.com/kulshekhar/ts-jest/issues/1982)



# [26.4.0](https://github.com/kulshekhar/ts-jest/compare/v26.3.0...v26.4.0) (2020-09-20)


### Bug Fixes

* **utils:** `pathsToModuleNameMapper` resolve path mapping with `path.join` ([#1969](https://github.com/kulshekhar/ts-jest/issues/1969)) ([81fce4c](https://github.com/kulshekhar/ts-jest/commit/81fce4c090811a1cc071579a99dc193fb976b117)), closes [#1968](https://github.com/kulshekhar/ts-jest/issues/1968)
* set minimum `jest-util` version at 26.1.0 ([#1914](https://github.com/kulshekhar/ts-jest/issues/1914)) ([f00414c](https://github.com/kulshekhar/ts-jest/commit/f00414c6fbf8fc5413fd33d0a271c4a164c50d45)), closes [#1913](https://github.com/kulshekhar/ts-jest/issues/1913)


### Features

* **config:** allow custom options in custom transformers ([#1966](https://github.com/kulshekhar/ts-jest/issues/1966)) ([1452ce4](https://github.com/kulshekhar/ts-jest/commit/1452ce4afcd36049cddd0db0861f1ac26b66f8c1)), closes [#1942](https://github.com/kulshekhar/ts-jest/issues/1942)
* **transformers:** support hoisting when using `@jest/globals` ([#1937](https://github.com/kulshekhar/ts-jest/issues/1937)) ([0e5be15](https://github.com/kulshekhar/ts-jest/commit/0e5be1597d755fed11869f67df05eeea54b3106f)), closes [#1593](https://github.com/kulshekhar/ts-jest/issues/1593)
* **transformers:** add `path-mapping` custom AST transformer ([#1927](https://github.com/kulshekhar/ts-jest/issues/1927)) ([3325186](https://github.com/kulshekhar/ts-jest/commit/3325186b6e55f41eb9bf7d81e092a358fc402b13))


### Performance Improvements

* **compiler:** remove `createProgram` for `isolatedModules: true` to boost startup speed ([#1941](https://github.com/kulshekhar/ts-jest/issues/1941)) ([dd84534](https://github.com/kulshekhar/ts-jest/commit/dd8453401840862186f991e2d514e0d328a67987))



# [26.3.0](https://github.com/kulshekhar/ts-jest/compare/v26.2.0...v26.3.0) (2020-08-25)


### Bug Fixes

* **config:** compute cache key without reading `package.json` ([#1893](https://github.com/kulshekhar/ts-jest/issues/1893)) ([4875a58](https://github.com/kulshekhar/ts-jest/commit/4875a58345666e0407f9f5b3f95049ae2c9d056d)), closes [#1892](https://github.com/kulshekhar/ts-jest/issues/1892)


### Features

* support TypeScript 4.0 ([#1889](https://github.com/kulshekhar/ts-jest/issues/1889)) ([f070e93](https://github.com/kulshekhar/ts-jest/commit/f070e9334a9cf31fa6f0d73b3f69d805be72601d))



# [26.2.0](https://github.com/kulshekhar/ts-jest/compare/v26.1.4...v26.2.0) (2020-08-11)


### Bug Fixes

* move `@types/jest` to dependencies to work well with yarn 2 ([#1859](https://github.com/kulshekhar/ts-jest/issues/1859)) ([5eb1389](https://github.com/kulshekhar/ts-jest/commit/5eb1389caaa0431e49ae6ca26b18e290208e0a0a)), closes [#1857](https://github.com/kulshekhar/ts-jest/issues/1857)


### Features

* **config:** support `after` and `afterDeclarations` AST transformers ([#1831](https://github.com/kulshekhar/ts-jest/issues/1831)) ([be20a7c](https://github.com/kulshekhar/ts-jest/commit/be20a7c78c97027b33aec178da0f533095790871))
* allow opt-out version warning message by environment variable `TS_JEST_DISABLE_VER_CHECKER` ([#1821](https://github.com/kulshekhar/ts-jest/issues/1821)) ([e6b42fc](https://github.com/kulshekhar/ts-jest/commit/e6b42fcd7a75c7b14e636a45cda04de18a46908b)), closes [#1774](https://github.com/kulshekhar/ts-jest/issues/1774)



## [26.1.4](https://github.com/kulshekhar/ts-jest/compare/v26.1.3...v26.1.4) (2020-07-28)


### Bug Fixes

* **compiler:** check if test file exists before doing type check ([#1827](https://github.com/kulshekhar/ts-jest/issues/1827)) ([cc89d5b](https://github.com/kulshekhar/ts-jest/commit/cc89d5b1f912975cd29114c5b3b0bf18426816da)), closes [#1506](https://github.com/kulshekhar/ts-jest/issues/1506)



## [26.1.3](https://github.com/kulshekhar/ts-jest/compare/v26.1.2...v26.1.3) (2020-07-16)


### Bug Fixes

* revert [#1793](https://github.com/kulshekhar/ts-jest/issues/1793) ([#1804](https://github.com/kulshekhar/ts-jest/issues/1804)) ([5095525](https://github.com/kulshekhar/ts-jest/commit/5095525333c8579c9c5e7f3149294b31f28d6774))



## [26.1.2](https://github.com/kulshekhar/ts-jest/compare/v26.1.1...v26.1.2) (2020-07-13)


### Bug Fixes

* **compiler:** use `resolveModuleNames` TypeScript API to get resolved modules for test files ([#1784](https://github.com/kulshekhar/ts-jest/issues/1784)) ([5f26054](https://github.com/kulshekhar/ts-jest/commit/5f2605457e94b548bd7b9b28fc968554f7eefa91)), closes [#1747](https://github.com/kulshekhar/ts-jest/issues/1747)
* **config:** invalidate cache when other options in `tsconfig` change ([#1788](https://github.com/kulshekhar/ts-jest/issues/1788)) ([6948855](https://github.com/kulshekhar/ts-jest/commit/69488552eca2846f3fc6ba86ab49d7893caaf521))


### Performance Improvements

* **compiler:** cache module resolution for `isolatedModules: false` ([#1786](https://github.com/kulshekhar/ts-jest/issues/1786)) ([7f731ed](https://github.com/kulshekhar/ts-jest/commit/7f731ed8a02755aeb41ecb27df4eaf16db2ddd95))
* **compiler:** use `globsToMatcher` from `jest-util` ([#1754](https://github.com/kulshekhar/ts-jest/issues/1754)) ([44f3913](https://github.com/kulshekhar/ts-jest/commit/44f3913c2a017734ed87346b1c5fbec639d02062))



<a name="26.1.1"></a>
## [26.1.1](https://github.com/kulshekhar/ts-jest/compare/v26.1.0...v26.1.1) (2020-06-21)


### Bug Fixes

* **compiler:** generate source map correctly when tsconfig `mapRoot` is set ([#1741](https://github.com/kulshekhar/ts-jest/issues/1741)) ([01ac417](https://github.com/kulshekhar/ts-jest/commit/01ac417)), closes [#1718](https://github.com/kulshekhar/ts-jest/issues/1718)
* **config:** show version warning when using ts-jest without babel ([#1729](https://github.com/kulshekhar/ts-jest/issues/1729)) ([e512bc0](https://github.com/kulshekhar/ts-jest/commit/e512bc0)), fixes [#1678-issuecomment-641930332](https://github.com//github.com/kulshekhar/ts-jest/pull/1678/issues/issuecomment-641930332), [#1678-issuecomment-639528993](https://github.com//github.com/kulshekhar/ts-jest/pull/1678/issues/issuecomment-639528993)



<a name="26.1.0"></a>
# [26.1.0](https://github.com/kulshekhar/ts-jest/compare/v26.0.0...v26.1.0) (2020-05-30)


### Bug Fixes

* **typing:** don't mark `BabelConfig` as internal type ([#1667](https://github.com/kulshekhar/ts-jest/issues/1667)) ([558c307](https://github.com/kulshekhar/ts-jest/commit/558c307)), closes [#1666](https://github.com/kulshekhar/ts-jest/issues/1666)


### Features

* **config:** show a warning message when TypeScript `target` version doesn't match with recommended NodeJs version ([#1678](https://github.com/kulshekhar/ts-jest/issues/1678)) ([085bdf5](https://github.com/kulshekhar/ts-jest/commit/085bdf5))
* **config:** support multiple paths for `pathsToModuleNameMapper` ([#1690](https://github.com/kulshekhar/ts-jest/issues/1690)) ([a727bd5](https://github.com/kulshekhar/ts-jest/commit/a727bd5))
* support TypeScript 3.9 ([#1653](https://github.com/kulshekhar/ts-jest/issues/1653)) ([fc3d5ad](https://github.com/kulshekhar/ts-jest/commit/fc3d5ad))



<a name="26.0.0"></a>
# [26.0.0](https://github.com/kulshekhar/ts-jest/compare/v25.5.1...v26.0.0) (2020-05-15)


### Bug Fixes

* **compiler:** return `undefined` for `getScriptVersion` when a file doesn't exist in memory cache ([#1641](https://github.com/kulshekhar/ts-jest/issues/1641)) ([6851b8e](https://github.com/kulshekhar/ts-jest/commit/6851b8e))


### Features

* support Jest v26 ([#1602](https://github.com/kulshekhar/ts-jest/issues/1602)) ([23b7741](https://github.com/kulshekhar/ts-jest/commit/23b7741))


### BREAKING CHANGES

* Requires a minimum of TypeScript v3.8
* Drop support for Node 8


<a name="25.5.1"></a>
## [25.5.1](https://github.com/kulshekhar/ts-jest/compare/v25.5.0...v25.5.1) (2020-05-09)


### Bug Fixes

* **compiler:** don't resolve files from build folder for `projectReferences` ([#1614](https://github.com/kulshekhar/ts-jest/issues/1614)) ([74b92d3](https://github.com/kulshekhar/ts-jest/commit/74b92d3))
* **config:** don't set `include` value of `tsconfig` to empty array ([#1606](https://github.com/kulshekhar/ts-jest/issues/1606)) ([8a29aaa](https://github.com/kulshekhar/ts-jest/commit/8a29aaa))



<a name="25.5.0"></a>
# [25.5.0](https://github.com/kulshekhar/ts-jest/compare/v25.4.0...v25.5.0) (2020-05-05)


### Bug Fixes

* **compiler:** make `projectReferences` work with `isolatedModules: false` ([#1541](https://github.com/kulshekhar/ts-jest/issues/1541)) ([3e8efbe](https://github.com/kulshekhar/ts-jest/commit/3e8efbe))
* **compiler:** allow using `files` provided by `tsconfig` ([#1562](https://github.com/kulshekhar/ts-jest/issues/1562)) ([a9f02bd](https://github.com/kulshekhar/ts-jest/commit/a9f02bd))
* **config:** verify `testMatchPatterns` contain RegExp instance or string type values ([#1569](https://github.com/kulshekhar/ts-jest/issues/1569)) ([7f85bab](https://github.com/kulshekhar/ts-jest/commit/7f85bab))


### Features

* **config:** add `tsconfig` alias to `tsConfig` option ([#1565](https://github.com/kulshekhar/ts-jest/issues/1565)) ([c10eb6d](https://github.com/kulshekhar/ts-jest/commit/c10eb6d))
* **config:** define 'ts-jest' on `ConfigGlobals` interface of `@jest/types` ([#1592](https://github.com/kulshekhar/ts-jest/issues/1592)) ([4526392](https://github.com/kulshekhar/ts-jest/commit/4526392))


### Performance Improvements

* **compiler:** don’t write compile output to file system but rely on jest cache ([#1561](https://github.com/kulshekhar/ts-jest/issues/1561)) ([d11a4ea](https://github.com/kulshekhar/ts-jest/commit/d11a4ea))
* **compiler:** improve performance for `isolatedModules: false` ([#1558](https://github.com/kulshekhar/ts-jest/issues/1558)) ([85c09e3](https://github.com/kulshekhar/ts-jest/commit/85c09e3))


### BREAKING CHANGES

* Any custom typing files or files which are needed to be compiled and intended to use with `jest` need to be defined in `files` option of `tsconfig`.

For example:

// tsconfig.json { // ...other configs "files": [ "my-custom-typings.d.ts", "my-global-module.ts" ] }

* **compiler:** `incremental` and `compilerHost` options are no longer available. Please remove it from your `ts-jest` config.



<a name="25.5.0-beta.0"></a>
# [25.5.0-beta.0](https://github.com/kulshekhar/ts-jest/compare/v25.5.0-alpha.0...v25.5.0-beta.0) (2020-04-29)


### Bug Fixes

* **compiler:** allow using `files` provided by `tsconfig` ([#1562](https://github.com/kulshekhar/ts-jest/issues/1562)) ([907a280](https://github.com/kulshekhar/ts-jest/commit/907a280))
* **config:** verify `testMatchPatterns` contain `RegExp` instance or `string` type values ([#1569](https://github.com/kulshekhar/ts-jest/issues/1569)) ([7f85bab](https://github.com/kulshekhar/ts-jest/commit/7f85bab))


### Features

* **config:** add `tsconfig` alias to `tsConfig` option ([#1565](https://github.com/kulshekhar/ts-jest/issues/1565)) ([c10eb6d](https://github.com/kulshekhar/ts-jest/commit/c10eb6d))


### Performance Improvements

* **compiler:** don’t write compile output to file system but rely on `jest` cache ([#1561](https://github.com/kulshekhar/ts-jest/issues/1561)) ([07b5f62](https://github.com/kulshekhar/ts-jest/commit/07b5f62))


### BREAKING CHANGES

* Any custom typing files or files which are needed to be compiled and intended to use with `jest` need to be defined in `files` option of `tsconfig`.

For example

// tsconfig.json { // ...other configs "files": [ "my-custom-typings.d.ts". "my-global-module.ts" ] } `

25.5.0-alpha.0 (2020-04-22)

Bug Fixes

compiler: make projectReferences work with isolatedModules: false (#1541) (3e8efbe)

Performance

compiler: improve performance for isolatedModules: false (#1558) (85c09e3)

BREAKING CHANGES

config: compilerHost and incremental options are no longer available

25.4.0 (2020-04-17)

Bug Fixes

compiler: make projectReferences work with isolatedModules: true (#1527) (aa6b74c)
compiler: make sure LanguageService updated with test file information before getting diagnostics for test file (#1507) (311eaeb)
config: set default outDir when allowJs is true and no outDir in tsconfig (#1502) (1a287ad)
config: use original jest config object instead of stringified config (#1511) (4f0bb33)

25.3.1 (2020-04-03)

Bug Fixes

only do type checking while compiling file (#1483) (dbc0a08)
config: set default outDir for enabled allowJs without outDir (#1472) (57c7af0)

25.3.0 (2020-03-30)

Bug Fixes

add jest-config to dependencies list (6d9e0d8)
always do type check for all files provided to ts-jest transformer for non-watch mode (#1450) (107e062)

Chores

docs: add TROUBLESHOOTING (96cd9b3)

Features

compiler: expose internal ts Program via ConfigSet TsCompiler (#1433) (7153246)
config: add incremental option (#1418) (5a69bce)

BREAKING CHANGES

config: improve diagnostics message (#1444) (96cd9b3). This will affect to any snapshots or assertion against diagnostics messages

25.2.1 (2020-02-21)

Bug Fixes

compiler: allow transformation of typescript files in node_modules (#1385) (814405e)
docs: fixing slack link and some minor typos in documenation (#1404) (3e2e008)
transformer: add deepUnmock to hoist method list (#1372) (0fbbc00)
util: use resolve package typescript package in yarn workspaces (#1377) (a63808c)

25.2.0 (2020-02-03)

Bug Fixes

config: let babel-jest handle loading babel config (#1370)

25.1.0 (2020-01-30)

Bug Fixes

jest 25 type definitions (#1363) (ba82a9e)

25.0.0 (2020-01-23)

Features

support Jest 25 (#1355)

24.3.0 (2020-01-07)

Bug Fixes

config: support babel config file path as string (#1332) (78a53c2)

24.2.0 (2019-11-22)

Bug Fixes

compiler: pass filename to sha function instead of file extension (ac1ac97)
transformers: hoist jest.enableAutomock and jest.disableAutomock (ac50bc3)
typescript serviceHost cache miss on Windows operating systems (26ee731)

24.1.0 (2019-09-12)

Bug Fixes

perf: add cache for fs calls (#908) (3dada81)
#825 handle symlinked modules (ala pnpm) correctly (e190b23)
handle tsBuildInfoFile option (f9583e9), closes #1095
types: unforce esModuleInterop in tsconfig.json (c2d39b6)

24.0.2 (2019-04-05)

24.0.1 (2019-03-30)

Bug Fixes

update call to globIgnore (#1002) (#1003) (05b63af)

Features

config: specify package.json location (#823) (#1013) (fb7dd55)

24.0.0 (2019-02-18)

Bug Fixes

cli test (1d67101)
module tests and some snapshots (999f889)
remove unused snapshots (108b08b)
some tests (d0f2231)
test command (8372b5e)
test path for windows (attempt 1) (6824ac4)
test path for windows (attempt 2) (eb2fc8a)

Features

jest: bump to 24 (defcb77)

23.10.4 (2018-10-06)

Bug Fixes

cache: adds project's dep versions to cache key (6cacbea), closes #785
cli: change options to better reflect the new presets (68abcfb)
helpers: deprecate import from ts-jest, now ts-jest/utils (33ff29f), closes #782
typings: typo in presets definition file (53767ab)
typings: wrong import in preset typings + test (94dc4e7)

23.10.3 (2018-09-30)

Bug Fixes

compiler: do not force module kind if piping babel (acebc8c), closes #767

Features

helpers: adds a mocked test helper for mock typings (f976135), closes #576

23.10.2 (2018-09-26)

Bug Fixes

cache: resolved tsconfig in cache key + pkg digest (e891608), closes #749
cli: resets testMatch if using testRegex option (31ad0aa), closes #756
diagnostics: throws only for category warning and error (bb28849), closes #748
import: wrong error message when a module exists but fails (e0d6c57)
preset: createJestPreset fails with base and no array (3c325e8)

Features

cli: CLI 'config:migrate' now detects best preset (febd8d3)
preset: adds 2 presets along the default one (9f3d759)
preset: adds presets typings and export all presets (f55d895)
typings: emit declaration files, filtering out internals (4f10f7e), closes #745

23.10.1 (2018-09-20)

Bug Fixes

compile: js files were never transpiled thru TS (374dca1), closes #740
config: warn instead of forcing ESM interoperability (a2a4be2)
windows: normalize paths (c12dfff)

23.10.0 (2018-09-19)

Bug Fixes

babel: fixes the babel 6 hack (c8d51cf)
config: jsx should also be considered as js files (6c32a93)

Features

hints: warns if transform matches js without allowJs (952cc87)

23.10.0-beta.6 (2018-09-13)

Bug Fixes

babel: instrumentation was done twice when using babel (659a7fb), closes #713
cache: includes all parameters in cache key computing (70e1867)
e2e: fixes the eval tool (not used yet) (939d13a)

23.10.0-beta.5 (2018-09-12)

Bug Fixes

package: fixes the outdated package-lock (c5a5b7a)

Features

diagnostics: add option to enable/disable first-TS-error-throws (2c840c2)

23.10.0-beta.4 (2018-09-06)

Bug Fixes

config: fixes a bug in the tsconfig file resolver (3910f2c)

23.10.0-beta.3 (2018-09-06)

Bug Fixes

config: fixes a bug in path resolver (ceb0424)

Features

cli: adds a cli tool to migrate old config (714f5f0)
cli: ads a simple config:init helper + tests (6700522)
config: exposes custom transformers to config for presets (885bc44)
logger: adds ts-jest version in the logger's context (bb0c06e)

Performance Improvements

bundle: improves bundle size (34eedc3)

23.10.0-beta.2 (2018-09-02)

Bug Fixes

caching: fixes a possible cache collision (9c38694)
testing: change logging level for some utility (16f125a)

Features

config: typeCheck default to true (langauge service) (623b2f4)

BREAKING CHANGES

config: Language service will be used by default from now on

23.10.0-beta.1 (2018-09-01)

Bug Fixes

ci: can't use runInBand for e2e: cache collision (db650f4)
ci: do not run e2e sub-tests in band (18ad865)
ci: ensure npm is present with ci (edb6eda)
logger: removes cyclic imports (5ef980f)
babel-config + adds test (12146c3)
fixes js style to be node < 10 compatible (83d7517)
hoisting per level + memoize fix (31847b0)
jest 22 did not have default config (cbaddc3)
makes node 6 happy (f6f82b8)
makes node6 happy (f170285)
makes window happy (36fbebe)
node 6 unhappy again... (703ad0b)
normalizes bundle hash on any node version (ce7afaf)
npm coming with node 6 doesn't talk ci (b87198d)
source maps (89a30c9)
typos + node 6 compat (0ed1587)
updates templates (f2e1da2)
uses cross-platform spawn + fix pkg versions (ac1599c)
we are not writing files, use normalized EOL (47fff43)
tests: CI fixes (34a41ea)
tests: detect npm version to use or not ci (683a1e5)
tests: do not use babel in our tests + new API for simple (3e4de3e)
tests: more sanitizing for windows compat (faae274)

Features

config: adds a helper to build moduleNameMapper from paths (7b8598e), closes #364
logging: improves log messages + tests (5d03c4d)
adds logging + better hashing (4322701)
allow env var to add diagnostic codes to ignore (777edf5)
cache key + tests (bd55448)
diagnostics, different compilers, ... (f26ebf0)
directly writes to stdio so jest does not swallow (6a7f01f)
handles stringifyContentPathRegex (3fcb4bd)
hoisting + tests + many other things (6186e84)
io serializer + other test utils (d03e0e7)
jest preset (beb50b5)
warn about unsupported versions (1103071)
test: jest serializers (dfa9c0f)
tests: more test tools + adds test related to debuggin issues (8dcafca)

Performance Improvements

babel: uses babel-jest cache key as part of ours (f51c4a7)
cache: share config-sets for parallel test running (090ca7b)
tests: run e2e tests in band (b3e94ff)
detects changes in templates and bundle (2a3da21)
do not type check if fileName doesn't match (cc45adc)
faster tests (37a0187)
improves speed of local test after 1st run (cc04021)
more cleaning (c48f7b8)
trying to improve travis-ci conf (e4b4d95)

23.1.3 (2018-08-06)

Bug Fixes

allow (but deprecate) use of old preprocessor.js (a65079f)
big refactor + fixes (mainly cache key + coverage) (e46caae)
fixes coverage and tests (09500c2)
gracefully load @babel/core or babel-core (98b2410)
hack for babel < 6 so that breakpoints do work (90c74ef), closes #627
resolves correctly config file path (fix #636) (5ab100c)
test rootDir to handle preset-angular (8a6a8f7)
wrong error message (c955083)
html: correctly transforms html source when needed (9a2d74f)
lint: fixes tslint script & lint issues (60ab36e)
package: update fs-extra to version 6.0.1 (7e73536)
package: update pkg-dir to version 3.0.0 (3fb8f9f)
package: update yargs to version 12.0.1 (390ffcd)
source-maps: fix source maps options/calls (76e27c1)
Typo in utils.ts (#534) (a650260)

Performance Improvements

do not hash cache key, jest does it underneath (fbe4f1f)

22.4.5 (2018-05-05)

22.4.1 (2018-03-02)

Bug Fixes

package: update source-map-support to version 0.5.0 (f0aab12)
package: update yargs to version 10.0.3 (5cdf969)
package: update yargs to version 11.0.0 (7e9ce40)
add startDir to if-clause (eed5311)
package: update yargs to version 9.0.1 (#326) (8bf9924)

Features

add option to run TypeScript diagnostics (13b77d9)

21.0.1 (2017-09-14)

21.0.0 (2017-09-05)

20.0.14 (2017-09-01)

20.0.13 (2017-08-30)

20.0.12 (2017-08-30)

20.0.11 (2017-08-29)

20.0.9 (2017-08-04)

Bug Fixes

package: update fs-extra to version 4.0.0 (5be18fb)

20.0.7 (2017-07-07)

Bug Fixes

peer dependency against Typescript 2.x (cb08128)
remove outDir when collecting coverage (c076956)
package: update fs-extra to version 3.0.0 (906be12)
package: update yargs to version 8.0.1 (0b2ea98)

Features

export transpileIfTypescript (6f835af)