@jest/core
30.5.2 · 18 Sep 2026MIT60.2M / weekRepositoryHomepagenpmAtom feed
Upgrading @jest/core From 27.1.0 to 27.5.1
19 releases in betweenevery note read
- 2
- changes to make
- 0
- advisories fixed
- 29
- new
- 40
- fixes
Before you upgrade
Tick each one off as you go- breaking27.4.3
- deprecated27.2.5
Release by release
- new
jest-config: Support comments in JSON config file
- new
pretty-format: Expose
ConvertAnsiplugin - new
expect: Add type definitions for asymmetric
closeTomatcher - fixed
jest-cli: Load binary via exported API
- fixed
jest-config: Replace
jsonlintwithparse-json - fixed
- new
- new
expect: Add asymmetric matcher
expect.closeTo - new
jest-mock: Added
mockFn.mock.lastCallto retrieve last argument - new
expect: Add a fix for
.toHaveProperty('') - new
@jest/globals: Add missing
optionsargument tojest.doMocktyping
- new
- fixed
jest-configAdd missing@babel/coredependency
- fixed
- new
jest-environment-node: Add
AbortSignal - new
jest-environment-node: Add Missing node global
performance - new
jest-configperf: only register ts-node once when loading TS config files - fixed
jest-runtime: Handle missing
mockedproperty
- new
- fixed
jest-worker: Stop explicitly passing
process.env
- fixed
- new
babel-jest: Add
process.versionchunk to the cache key - new
jest-environment: Add
mockedtojestobject - fixed
jest-worker: Stop explicitly passing
execArgv
- new
- breaking
jest-environment-jsdom: Remove
@types/jsdomdependency (and make itsdompropertyprivate)
- breaking
- new
jest-worker: Add additional
execArgvto filter
- new
12 internal lines (docs, tests, tooling) left out.