Jest Environment JSDOM offers a simulated browser environment for running JavaScript tests within Jest, enabling developers to test code that relies on browser APIs without needing an actual browser. Comparing versions 26.6.1 and 26.6.0 reveals subtle but important adjustments primarily focusing on dependency updates within the Jest ecosystem. Specifically, version 26.6.1 bumps the dependencies on jest-mock, jest-util, @jest/types, @jest/environment, and @jest/fake-timers from version 26.6.0 to 26.6.1. This consolidation likely includes bug fixes, performance improvements, or new features introduced in those core Jest packages.
For developers, these incremental updates within Jest are crucial for stability and reliability. Upgrading to version 26.6.1 ensures they benefit from the latest refinements and bug squashes within the Jest testing framework itself. The consistent jsdom and @types/jsdom dependencies across both versions suggest that the core JSDOM implementation within jest-environment-jsdom remained stable thus any problems should come from Jest core packages. Checking the release notes for the core Jest packages (jest-mock, jest-util etc.) from 26.6.0 to 26.6.1 should inform whether the upgrade is mandatory, recomended or optional. The release date difference is also interesting: 26.6.1 was released about 4 days after 26.6.0, hinting at possible hotfixes released during the period.
The are not vulnerabilities for the version 26.6.1 of the package jest-environment-jsdom
