@jest/expect-utils is a utility package for Jest, offering helpful functions to enhance the creation and validation of custom matchers. It provides tools for comparing values, formatting output, and ensuring type safety when building robust and reliable tests. This package simplifies the process of writing expressive and maintainable matchers within the Jest testing framework, enabling developers to craft tailored assertions specific to their application's needs.
The @jest/expect-utils package saw consistent releases throughout 2022 and the first half of 2023, with peaks in April and September 2022. Release frequency significantly decreased in the latter half of 2023 and throughout 2024. Releases resumed in June 2025 with version 30.0.0 and have continued at a slower pace through September 2025.
@jest/expect-utils npm package downloads show a strong upward trend from March 2024 to July 2025 where they peaked at 135 million. August 2025 saw a decline, and preliminary data for September 2025 indicates a further significant decrease, likely due to the month being incomplete.
