Babel-jest is a crucial tool for JavaScript developers using Jest, enabling seamless integration of Babel's transformation capabilities for testing modern JavaScript code. Comparing versions 30.0.4 and 30.0.2 reveals subtle differences, primarily in dependency versions, file sizes, and release dates, reflecting the iterative nature of software development.
Version 30.0.4, released on July 2nd, 2025, includes updates to @jest/transform (updated from 30.0.2 to 30.0.4) and @jest/test-utils(updated from 30.0.2 to 30.0.4), suggesting improvements or bug fixes within Jest's transformation and testing utilities. While seemingly minor, these updates can impact test execution and reliability. These changes explains also the small changes in file size that increased slightly from 6 to 7 files, reflecting potential additions or modifications to the package's internal structure. The unpacked size also saw a minor increase, by a little more than 500 bytes.
For developers considering upgrading, the key takeaway is to evaluate whether the updates in @jest/transform and @jest/test-utils address any existing issues or offer performance enhancements relevant to their projects. Dependency updates, even minor ones, can introduce compatibility considerations. While both versions share peer dependencies like @babel/core (version ^7.11.0), ensuring compatibility between your Babel configuration and the updated Jest modules is crucial.
The are not vulnerabilities for the version 30.0.4 of the package babel-jest