Jest environment jsdom package version 29.1.2 brings several dependency updates compared to the previous stable version 29.1.1, potentially providing developers with subtle improvements and bug fixes. The core dependencies jest-mock, jest-util, @jest/types, @jest/environment, and @jest/fake-timers have all been bumped from versions 29.1.1 or 29.1.0 to 29.1.2. These updates likely incorporate internal enhancements, bug fixes, or performance optimizations within the Jest ecosystem that indirectly affect the jsdom environment.
Developers should be aware of these changes, especially if they've encountered specific issues related to mocking, utilities, type definitions, environment setup, or fake timers within their Jest tests using the jsdom environment. While the functional differences might not be immediately apparent, staying up-to-date with the latest versions of these core dependencies ensures access to the most current bug fixes and improvements. The bump in @jest/test-utils to 29.1.2 from 29.1.0 in the devDependencies might bring improvements in testing the jest environment itself.
The update provides access to refined functionalities within the Jest testing framework when utilizing a simulated browser environment, which enables more reliable and consistent testing of JavaScript code that interacts with the DOM. If you're experiencing any problems or inconsistencies in your jsdom-based tests with version 29.1.1, upgrading to 29.1.2 is recommended.
The are not vulnerabilities for the version 29.1.2 of the package jest-environment-jsdom
