what stackpulse tracks
Jest releases from GitHub
StackPulse watches Jest release notes and keeps the original source link close to every summary.
#stacks/jest/testing
Jest release notes, breaking changes, and upgrade notes.
Delightful JavaScript testing framework StackPulse turns upstream changelogs into scannable summaries with risky changes, deprecations, migration notes, and source links.
releases
5
breaking
0
security
0
deprecated
0
migrations
0
upgrade risk
Breaking changes and deprecations
Risky changes are separated from normal feature notes so you can scan upgrade impact before changing production dependencies.
migration notes
Source-backed next steps
Migration steps and recommended actions are only shown when the upstream release notes support them.
# latest_releases
source-backedv30.4.2mediumfeatureMay 9, 2026
v30.4.2
This release fixes an issue with named imports from CommonJS modules whose `module.exports` is a function with own-property exports.
affected
Users relying on named imports from CommonJS modules with function exports may be affected.
action
Update to v30.4.2 to resolve the named import issue.
v30.4.1mediumfeatureMay 8, 2026
v30.4.1
This release introduces support for custom runner configuration options and aligns CJS-from-ESM default export behavior with Node.js.
affected
Developers using custom runners or CJS-from-ESM imports in Jest are affected.
action
Update to v30.4.1 to benefit from the new features and fixes.
release_signals
+Allow custom runner configuration options via tuple format `['runner-path', {options}]`
v30.4.0highfeatureMay 7, 2026
v30.4.0
This release focuses on improving ESM support, including `require(esm)` compatibility on Node 24.9+, and introduces support for the `Temporal` API in fake timers. React 19 is now properly supported in `pretty-format`, ensuring snapshots of React components work correctly.
affected
Developers using Jest with ESM modules, React 19, or the Temporal API will be affected.
action
Update Jest to v30.4.0 to benefit from new features and fixes.
release_signals
+Support collecting coverage from `.mts`, `.cts` files
+Add `--collect-tests` flag to discover and list tests without executing them
+Add `workerGracefulExitTimeout` config option
+Support `jest.config.mts` as a valid configuration file
+Support `Temporal` API in fake timers
v30.3.0mediumfeatureMar 10, 2026
v30.3.0
This release introduces type-safe Jest config helpers, adds a new timer tick mode configuration, and reduces token usage for LLM runs. It also includes several fixes for CLI output, dynamic imports, and test sequencing.
affected
Developers using Jest for testing may benefit from the new type-safe config helpers and timer tick mode configuration.
action
Update to v30.3.0 to take advantage of the new features and fixes.
release_signals
+Add `defineConfig` and `mergeConfig` helpers for type-safe Jest config
+Add `setTimerTickMode` to configure how timers advance
+Reduce token usage when run through LLMs
v30.2.0mediumfeatureSep 28, 2025
30.2.0
This release introduces support for JSDOM v27 and includes fixes for `babel-jest` and `jest-config` configurations. Maintenance updates were also made to testing examples and dependencies.
affected
Users relying on JSDOM v27 or working with `babel-jest` and `jest-config` configurations are affected.
action
Update to v30.2.0 to benefit from JSDOM v27 support and configuration fixes.
release_signals
+Add support for JSDOM v27 in `jest-environment-jsdom-abstract`