v3.0.0 #358
markerikson
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v3.0.0
#358
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This major release:
This release has breaking changes.
This release is part of a wave of major versions of all the Redux packages: Redux Toolkit 2.0, Redux core 5.0, React-Redux 9.0, Reselect 5.0, and Redux Thunk 3.0.
For full details on all of the breaking changes and other significant changes to all of those packages, see the "Migrating to RTK 2.0 and Redux 5.0" migration guide in the Redux docs.
Note
The Redux core, Reselect, and Redux Thunk packages are included as part of Redux Toolkit, and RTK users do not need to manually upgrade them - you'll get them as part of the upgrade to RTK 2.0. (If you're not using Redux Toolkit yet, please start migrating your existing legacy Redux code to use Redux Toolkit today!)
Changelog
Named Exports Instead of Default Exports
The
redux-thunk
package previously used a single default export that was the thunk middleware, with an attached field namedwithExtraArgument
that allowed customization.The default export has been removed. There are now two named exports:
thunk
(the basic middleware) andwithExtraArgument
.If you are using Redux Toolkit, this should have no effect, as RTK already handles this inside of
configureStore
.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-thunk.mjs
. Most build tools should pick this up. There's also a CJS artifact, and a second copy of the ESM file namedredux-thunk.legacy-esm.js
to support Webpack 4 (which does not recognize theexports
field inpackage.json
).Build Tooling
We're now building the package using https://github.com/egoist/tsup. We also now include sourcemaps for the ESM and CJS artifacts.
The repo has been updated to use Yarn 3 for dependencies and Vitest for running tests.
Dropping UMD Builds
Redux has always shipped with UMD build artifacts. These are primarily meant for direct import as script tags, such as in a CodePen or a no-bundler build environment.
For now, we're dropping those build artifacts from the published package, on the grounds that the use cases seem pretty rare today.
Since the code is so simple, the ESM artifact can be used directly in the browser via Unpkg.
If you have strong use cases for us continuing to include UMD build artifacts, please let us know!
extend-redux
Typedefs RemovedRedux Thunk 2.x included a
redux-thunk/extend-redux
TS-only entry point, which extended the types ofdispatch
andbindActionCreators
to globally give them knowledge of the thunk types. We feel that global overrides from a library are an anti-pattern, and we've removed this entry point. (Note: this ended up being released in 3.1.0, as it was missed in the original 3.0.0 release.)Please follow our TS setup guidelines to infer the correct type of
dispatch
for your store.This discussion was created from the release v3.0.0.
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