npm / ts-jest
ts-jest
What changed in ts-jest 25 to 29, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-27.
2 breaking1 deprecations1 tooling
See which of these apply to your code, ranked, in your agent:
npx @unstale/cli initts-jest 293 changes
Breaking changes 2
Jest 29 is required.
Support for Node 12 and Node 17 was dropped; only Node 14, 16 and 18 are supported.
Deprecations 1
Defining ts-jest config under globals is deprecated; define the config via transformer config instead.
ts-jest 251 changes
Tooling 1
ts-jest supports Jest 25, allowing developers to use it with this Jest release.