Releases · reduxjs/redux · GitHubChangelog ESM/CJS Package Compatibility The biggest theme of the Redux v5 and RTK 2.0 releases is trying to get "true" ESM package publishing compatibility in place, while still supporting CJS in the published package. The primary build artifact is now an ESM file, dist/redux.mjs. Most build tools should pick this up. There's also a CJS artifact, and a second copy of the ESM file named redux.legac
