jest-util

jest-config: Don't warn about global-only options in the config that supplies the global config - the root config a project resolves to, or the first entry of --projects when no root config is passed

jest-config, jest-types: Stop accepting reporters, coverageReporters, workerIdleMemoryLimit, cwd and runnerOptions in a project config - they were silently ignored, and now warn like the other global-only options

jest-config, jest-validate: Warn about maxWorkers and coverageThreshold in a project config instead of dropping them without a word

jest-resolve: Match moduleNameMapper patterns against the specifier as written again (reverting #16390)

jest-runtime: Resolve package imports specifiers like #dep under ESM again

jest-haste-map: Match watched files on a full extension, so moduleFileExtensions: ['js'] no longer accepts foo.mjs

@jest/source-map: Deprecate getCallsite in favour of SourceMapSupport#getCallsite

babel-plugin-istanbul is updated to v8

glob is updated to v13

[jest-config, jest-core, jest-runner, jest-schemas, jest-types] Allow custom runner configuration options via tuple format ['runner-path', {options}]

jest-runtime: Align CJS-from-ESM default export with Node: module.exports is always the ESM default, __esModule unwrapping is no longer applied

babel-jest: Support collecting coverage from .mts, .cts (and other) files

[jest-circus, jest-cli, jest-config, jest-core, jest-jasmine2, jest-types] Add --collect-tests flag to discover and list tests without executing them

jest-config, jest-runner, jest-worker: Add workerGracefulExitTimeout config option to control how long workers are given to exit before being force-killed

jest-config: Add support for jest.config.mts as a valid configuration file

jest-config: Add defineConfig and mergeConfig helpers for type-safe Jest config

jest-fake-timers: Add setTimerTickMode to configure how timers advance

*: Reduce token usage when run through LLMs

jest-config: Keep CLI coverage output when using --json with --outputFile

jest-environment-jsdom-abstract: Add support for JSDOM v27

babel-jest: Export the TransformerConfig interface

jest-config: Fix jest.config.ts with TS loader specified in docblock pragma

jest-config: Allow testMatch to take a string value

jest-worker: Let workerIdleMemoryLimit accept 0 to always restart worker child processes

expect: Fix bigint error

jest-matcher-utils: Make 'deepCyclicCopyObject' safer by setting descriptors to a null-prototype object

jest-util: Make garbage collection protection property writable