Jest is a delightful JavaScript Testing Framework with a focus on simplicity. It works with projects using Babel, TypeScript, Node, React, Angular, Vue, and more! Jest requires zero configuration most of the time and makes testing painless. With its easy-to-use API, isolated test cases, and built-in mocking, Jest enables developers to write comprehensive and maintainable tests confidently, ensuring code reliability and driving efficient development workflows.
Jest's release frequency has varied significantly since its inception in 2012. Early development saw rapid iterations. Releases became less frequent from 2013-2015, then surged again from 2016-2022. 2023 and 2024 showed decreasing activity. In 2025, there were 6 releases in June and July. Overall, release patterns have been inconsistent.
Jest's npm downloads show fluctuating popularity. From February 2024 to July 2025, downloads generally increased, peaking in June and July 2025 around 160 million. August 2025 downloads are significantly lower, at 68 million, likely due to the month being incomplete as of August 18th.
