Version Details and Security Vulnerabilities

Core-js version 2.5.6 represents a minor update over its predecessor, version 2.5.5, primarily focusing on internal improvements and dependency adjustments. For developers utilizing core-js to polyfill modern JavaScript features in older environments, the key difference lies within its devDependencies. Version 2.5.6 upgrades eslint-plugin-import from version 2.10.x to 2.11.x, which may introduce new linting rules or stricter enforcement of existing ones. This could affect developers using ESLint to maintain code quality, potentially requiring adjustments to their codebase to comply with the updated linting configuration.

While the core functionalities of core-js remain largely consistent between the two versions, developers should be mindful of the upgraded eslint-plugin-import if they rely heavily on ESLint for their projects. The unpackedSize shows a slight increase, growing from 2,175,992 to 2,181,757, the reasons for which are not documented with the data. In practice this should not a breaking change for most developers. The update was released on May 7th, 2018, approximately a month after version 2.5.5, so developers should be aware if critical bugs were to arise as a result of the change. For those not directly impacted by the dependency upgrade, migrating to version 2.5.6 offers a slightly newer iteration of core-js, potentially benefiting from minor bug fixes or performance enhancements.