fix(deps): update dependency react-redux to v8 #521
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This PR contains the following updates:
7.2.9->8.0.5Release Notes
reduxjs/react-redux
v8.0.5Compare Source
This release fixes a few minor TS issues.
What's Changed
Provider: pass state (S) generic through toProviderPropsby @OliverJAsh in https://github.com/reduxjs/react-redux/pull/1960equalityFntype inNoInferby @phryneas in https://github.com/reduxjs/react-redux/pull/1965Full Changelog: reduxjs/react-redux@v8.0.4...v8.0.5
v8.0.4Compare Source
This patch release fixes some minor TS types issues, and updates the rarely-used
areStatesEqualoption forconnectto now pass throughownPropsfor additional use in determining which pieces of state to compare if desired.Changelog
TS Fixes
We've fixed an import of
Reactthat caused issues with theallowSyntheticDefaultImportsTS compiler flag in user projects.connectalready accepted a custom context instance asprops.context, and had runtime checks in case users were passing through a real value with app data asprops.contextinstead. However, the TS types did not handle that case, and this would fail to compile. If your own component expectsprops.contextwith actual data,connect's types now use that type instead.The
ConnectedProps<T>type had a mismatch with React's built-inReact.ComponentProps<Component>type, and that should now work correctly.Other Changes
The
areStatesEqualoption toconnectnow receivesownPropsas well, in case you need to make a more specific comparison with certain sections of state.The new signature is:
What's Changed
ComponentPropsfrom older@types/reactby @Andarist in https://github.com/reduxjs/react-redux/pull/1956Full Changelog: reduxjs/react-redux@v8.0.2...v8.0.4
v8.0.3Compare Source
This release was accidentally published without an intended fix - please use v8.0.4 instead
v8.0.2Compare Source
This patch release tweaks the behavior of
connectto print a one-time warning when the obsoletepureoption is passed in, rather than throwing an error. This fixes crashes caused by libraries such asreact-beautiful-dndcontinuing to pass in that option (unnecessarily) to React-Redux v8.What's Changed
Full Changelog: reduxjs/react-redux@v8.0.1...v8.0.2
v8.0.1Compare Source
This release fixes an incorrect internal import of our
Subscriptiontype, which was causing TS compilation errors in some user projects. We've also listed@types/react-domas an optional peerDep. There are no runtime changes in this release.What's Changed
SubscriptioncausesnoImplicitAnyerror by @vicrep in https://github.com/reduxjs/react-redux/pull/1910Full Changelog: reduxjs/react-redux@v8.0.0...v8.0.1
v8.0.0Compare Source
This major version release updates
useSelector,connect, and<Provider>for compatibility with React 18, rewrites the React-Redux codebase to TypeScript (obsoleting use of@types/react-redux), modernizes build output, and removes the deprecatedconnectAdvancedAPI and thepureoption forconnect.Overview, Compatibility, and Migration
Our public API is still the same (
<Provider>,connectanduseSelector/useDispatch), but we've updated the internals to use the newuseSyncExternalStorehook from React. React-Redux v8 is still compatible with all versions of React that have hooks (16.8+, 17.x, and 18.x; React Native 0.59+), and should just work out of the box.In most cases, it's very likely that the only change you will need to make is bumping the package version to
"react-redux": "^8.0".If you are using the rarely-used
connectAdvancedAPI, you will need to rewrite your code to avoid that, likely by using the hooks API instead. Similarly, thepureoption forconnecthas been removed.If you are using Typescript, React-Redux is now written in TS and includes its own types. You should remove any dependencies on
@types/react-redux.While not directly tied to React-Redux, note that the recently updated
@types/react@18major version has changed component definitions to remove havingchildrenas a prop by default. This causes errors if you have multiple copies of@types/reactin your project. To fix this, tell your package manager to resolve@types/reactto a single version. Details:React issue #24304: React 18 types broken since release
Additionally, please see the React post on How to Ugprade to React 18 for details on how to migrate existing apps to correctly use React 18 and take advantage of its new features.
Changelog
React 18 Compatibility
React-Redux now requires the new
useSyncExternalStoreAPI in React 18. By default, it uses the "shim" package which backfills that API in earlier React versions, so React-Redux v8 is compatible with all React versions that have hooks (16.8+, and React Native 0.59+) as its acceptable peer dependencies.We'd especially like to thank the React team for their extensive support and cooperation during the
useSyncExternalStoredevelopment effort. They specifically designeduseSyncExternalStoreto support the needs and use cases of React-Redux, and we used React-Redux v8 as a testbed for howuseSyncExternalStorewould behave and what it needed to cover. This in turn helped ensure thatuseSyncExternalStorewould be useful and work correctly for other libraries in the ecosystem as well.Our performance benchmarks show parity with React-Redux v7.2.5 for both
connectanduseSelector, so we do not anticipate any meaningful performance regressions.useSyncExternalStoreand BundlingThe
useSyncExternalStoreshim is imported directly in the main entry point, so it's always included in bundles even if you're using React 18. This adds roughly 600 bytes minified to your bundle size.If you are using React 18 and would like to avoid that extra bundle cost, React-Redux now has a new
/nextentry point. This exports the exact same APIs, but directly importsuseSyncExternalStorefrom React itself, and thus avoids including the shim. You can alias"react-redux": "react-redux/next"in your bundler to use that instead.SSR and Hydration
React 18 introduces a new
hydrateRootmethod for hydrating the UI on the client in Server-Side Rendering usage. As part of that, theuseSyncExternalStoreAPI requires that we pass in an alternate state value other than what's in the actual Redux store, and that alternate value will be used for the entire initial hydration render to ensure the initial rehydrated UI is an exact match for what was rendered on the server. After the hydration render is complete, React will then apply any additional changes from the store state in a follow-up render.React-Redux v8 supports this by adding a new
serverStateprop for<Provider>. If you're using SSR, you should pass your serialized state to<Provider>to ensure there are no hydration mismatch errors:TypeScript Migration and Support
The React-Redux library source has always been written in plain JS, and the community maintained the TS typings separately as
@types/react-redux.We've (finally!) migrated the React-Redux codebase to TypeScript, using the existing typings as a starting point. This means that the
@types/react-reduxpackage is no longer needed, and you should remove that as a dependency.We've tried to maintain the same external type signatures as much as possible. If you do see any compile problems, please file issues with any apparent TS-related problems so we can review them.
The TS migration was a great collaborative effort, with many community members contributing migrated files. Thank you to everyone who helped out!
In addition to the "pre-typed"
TypedUseSelectorHook, there's now also aConnect<State = unknown>type that can be used as a "pre-typed" version ofconnectas well.As part of the process, we also updated the repo to use Yarn 3, copied the typetests files from DefinitelyTyped and expanded them, and improved our CI setup to test against multiple TS versions.
Removal of the
DefaultRootStatetypeThe
@types/react-reduxpackage, which has always been maintained by the community, included aDefaultRootStateinterface that was intended for use with TS's "module augmentation" capability. BothconnectanduseSelectorused this as a fallback if no state generic was provided. When we migrated React-Redux to TS, we copied over all of the types from that package as a starting point.However, the Redux team specifically considers use of a globally augmented state type to be an anti-pattern. Instead, we direct users to extract the
RootStateandAppDispatchtypes from the store setup, and create pre-typed versions of the React-Redux hooks for use in the app.Now that React-Redux itself is written in TS, we've opted to remove the
DefaultRootStatetype entirely. State generics now default tounknowninstead.Technically the module augmentation approach can still be done in userland, but we discourage this practice.
Modernized Build Output
We've always targeted ES5 syntax in our published build artifacts as the lowest common denominator. Even the "ES module" artifacts with
import/exportkeywords still were compiled to ES5 syntax otherwise.With IE11 now effectively dead and many sites no longer supporting it, we've updated our build tooling to target a more modern syntax equivalent to ES2017, which shrinks the bundle size slightly.
If you still need to support ES5-only environments, please compile your own dependencies as needed for your target environment.
Removal of Legacy APIs
We announced in 2019 that the legacy
connectAdvancedAPI would be removed in the next major version, as it was rarely used, added internal complexity, and was also basically irrelevant with the introduction of hooks. As promised, we've removed that API.We've also removed the
pureoption forconnect, which forced components to re-render regardless of whether props/state had actually changed if it was set tofalse. This option was needed in some cases in the early days of the React ecosystem, when components sometimes relied on external mutable data sources that could change outside of rendering. Today, no one writes components that way, the option was barely used, and React 18'suseSyncExternalStorestrictly requires immutable updates. So, we've removed thepureflag.Given that both of these options were almost never used, this shouldn't meaningfully affect anyone.
Changes
Due to the TS migration effort and number of contributors, this list covers just the major changes:
pureremoval by @Andarist in https://github.com/reduxjs/react-redux/pull/1859useSyncExternalStoreshim behavior and update React deps by @markerikson in https://github.com/reduxjs/react-redux/pull/1884DefaultRootStatetype by @markerikson in https://github.com/reduxjs/react-redux/pull/1887serverStatebehavior by @markerikson in https://github.com/reduxjs/react-redux/pull/1888peerDependenciesby @kyletsang in https://github.com/reduxjs/react-redux/pull/1893dispatchProparg inmergePropsby @markerikson in https://github.com/reduxjs/react-redux/pull/1897Configuration
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