babel-jest is a transformer that precompiles your JavaScript code using Babel for Jest testing. It enables you to seamlessly use modern JavaScript features and syntax, including JSX, ESnext, and Flow type annotations, within your Jest tests without any extra configuration in most cases. By transforming your source code on the fly before running tests, babel-jest ensures that your tests are executed against code that is compatible with the target JavaScript environment.
The babel-jest package has a fluctuating release frequency. Releases were more common from 2015 to 2022, with peaks in 2016 and 2021. There were no releases between October 2023 and May 2025. In June and July 2025 there were five releases, bringing the package to version 30.0.5.
Babel-jest downloads show volatility between March 2024 and August 2025. Initially around 100-110 million, downloads peaked in November 2024 (132M) and again in June/July 2025 (171M). August 2025 shows a decrease (140M), but is not yet a complete month of data.
