fix(deps): update dependency react-redux to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
react-redux	^7.2.9 -> ^9.1.0

---

Release Notes

reduxjs/react-redux (react-redux)

v9.1.0

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v9.0.4

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This bugfix release updates the React Native peer dependency to be >= 0.69, to better reflect the need for React 18 compat and (hopefully) resolve issues with the npm package manager throwing peer dep errors on install.

What's Changed

• Allow react-native newer than 0.69 as peer dependency by @​R3DST0RM in https://github.com/reduxjs/react-redux/pull/2107

Full Changelog: reduxjs/react-redux@v9.0.3...v9.0.4

v9.0.3

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This bugfix release drops the ReactDOM / React Native specific use of render batching, as React 18 now automatically batches, and updates the React types dependencies

Changelog

Batching Dependency Updates

React-Redux has long depended on React's unstable_batchedUpdates API to help batch renders queued by Redux updates. It also re-exported that method as a util named batch.

However, React 18 now auto-batches all queued renders in the same event loop tick, so unstable_batchedUpdates is effectively a no-op.

Using unstable_batchedUpdates has always been a pain point, because it's exported by the renderer package (ReactDOM or React Native), rather than the core react package. Our prior implementation relied on having separate batch.ts and batch.native.ts files in the codebase, and expecting React Native's bundler to find the right transpiled file at app build time. Now that we're pre-bundling artifacts in React-Redux v9, that approach has become a problem.

Given that React 18 already batches by default, there's no further need to continue using unstable_batchedUpdates internally, so we've removed our use of that and simplified the internals.

We still export a batch method, but it's effectively a no-op that just immediately runs the given callback, and we've marked it as @deprecated.

We've also updated the build artifacts and packaging, as there's no longer a need for an alternate-renderers entry point that omits batching, or a separate artifact that imports from "react-native".

What's Changed

• Drop renderer-specific batching behavior and deprecate batch by @​markerikson in https://github.com/reduxjs/react-redux/pull/2104
• Drop @types/react-dom and lower @types/react to min needed by @​markerikson in https://github.com/reduxjs/react-redux/pull/2105

Full Changelog: reduxjs/react-redux@v9.0.2...v9.0.3

v9.0.2

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This bugfix release makes additional tweaks to the React Native artifact filename to help resolve import and bundling issues with RN projects.

What's Changed

• Change react-native output extension from .mjs to .js by @​aryaemami59 in https://github.com/reduxjs/react-redux/pull/2102

Full Changelog: reduxjs/react-redux@v9.0.1...v9.0.2

v9.0.1

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This bugfix release updates the package to include a new react-redux.react-native.js bundle that specifically imports React Native, and consolidates all of the 'react' imports into one file to save on bundle size (and enable some tricky React Native import handling).

What's Changed

• Add an RN-specific bundle and consolidate imports by @​markerikson in https://github.com/reduxjs/react-redux/pull/2100

Full Changelog: reduxjs/react-redux@v9.0.0...v9.0.1

v9.0.0

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This major release:

• Switches to requiring React 18 and Redux Toolkit 2.0 / Redux 5.0
• Updates the packaging for better ESM/CJS compatibility and modernizes the build output
• Updates the options for dev mode checks in useSelector
• Adds a new React Server Components artifact that throws on use, to better indicate compat issues

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!)
React-Redux is a separate, package, but we expect you'll be upgrading them together.

##### React-Redux
npm install react-redux
yarn add react-redux

##### RTK
npm install @​reduxjs/toolkit
yarn add @​reduxjs/toolkit

##### Standalone Redux core
npm install redux
yarn add redux

Changelog

React 18 and RTK 2 / Redux core 5 Are Required

React-Redux 7.x and 8.x worked with all versions of React that had hooks (16.8+, 17.x, 18.x). However, React-Redux v8 used React 18's new useSyncExternalStore hook. In order to maintain backwards compatibility with older React versions, we used the use-sync-external-store "shim" package that provided an official userland implementation of the useSyncExternalStore hook when used with React 16 or 17. This meant that if you were using React 18, there were a few hundred extra bytes of shim code being imported even though it wasn't needed.

For React-Redux v9, we're switching so that React 18 is now required! This both simplifies the maintenance burden on our side (fewer versions of React to test against), and also lets us drop the extra bytes because we can import useSyncExternalStore directly.

React 18 has been out for a year and a half, and other libraries like React Query are also switching to require React 18 in their next major version. This seems like a reasonable time to make that switch.

Similarly, React-Redux now depends on Redux core v5 for updated TS types (but not runtime behavior). We strongly encourage all Redux users to be using Redux Toolkit, which already includes the Redux core. Redux Toolkit 2.0 comes with Redux core 5.0 built in.

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/react-redux.mjs. Most build tools should pick this up. There's also a CJS artifact, and a second copy of the ESM file named react-redux.legacy-esm.js to support Webpack 4 (which does not recognize the exports field in package.json). There's also two special-case artifacts: an "alternate renderers" artifact that should be used for any renderer other than ReactDOM or React Native (such as the ink React CLI renderer), and a React Server Components artifact that throws when any import is used (since using hooks or context would error anyway in an RSC environment). Additionally, all of the build artifacts now live under ./dist/ in the published package.

Previous releases actually shipped separate individual transpiled source files - the build artifacts are now pre-bundled, same as the rest of the Redux libraries.

Modernized Build Output

We now publish modern JS syntax targeting ES2020, including optional chaining, object spread, and other modern syntax. If you need to

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.

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.

We've dropped those build artifacts from the published package, on the grounds that the use cases seem pretty rare today.

There's now a react-redux.browser.mjs file in the package that can be loaded from a CDN like Unpkg.

If you have strong use cases for us continuing to include UMD build artifacts, please let us know!

React Server Components Behavior

Per Mark's post "My Experience Modernizing Packages to ESM", one of the recent pain points has been the rollout of React Server Components and the limits the Next.js + React teams have added to RSCs. We see many users try to import and use React-Redux APIs in React Server Component files, then get confused why things aren't working right.

To address that, we've added a new entry point with a "react-server" condition. Every export in that file will throw an error as soon as it's called, to help catch this mistake earlier.

Dev Mode Checks Updated

In v8.1.0, we updated useSelector to accept an options object containing options to check for selectors that always calculate new values, or that always return the root state.

We've renamed the noopCheck option to identityFunctionCheck for clarity. We've also changed the structure of the options object to be:

export type DevModeCheckFrequency = 'never' | 'once' | 'always'

export interface UseSelectorOptions<Selected = unknown> {
  equalityFn?: EqualityFn<Selected>
  devModeChecks?: {
    stabilityCheck?: DevModeCheckFrequency
    identityFunctionCheck?: DevModeCheckFrequency
  }
}

hoist-non-react-statics and react-is Deps Inlined

Higher Order Components have been discouraged in the React ecosystem over the last few years. However, we still include the connect API. It's now in maintenance mode and not in active development.

As described in the React legacy docs on HOCs, one quirk of HOCs is needing to copy over static methods to the wrapper component. The hoist-non-react-statics package has been the standard tool to do that.

We've inlined a copy of hoist-non-react-statics and removed the package dep, and confirmed that this improves tree-shaking.

We've also done the same with the react-is package as well, which was also only used by connect.

This should have no user-facing effects.

TypeScript Support

We've dropped support for TS 4.6 and earlier, and our support matrix is now TS 4.7+.

What's Changed

• Update packaging, build config, and entry points for v9 by @​markerikson in https://github.com/reduxjs/react-redux/pull/2038
• Add stack to dev mode checks by @​EskiMojo14 in https://github.com/reduxjs/react-redux/pull/2064
• add an extra entrypoint for React Server Components by @​phryneas in https://github.com/reduxjs/react-redux/pull/2062
• Inline hoist-non-react-statics to eliminate a dep and help shaking by @​markerikson in https://github.com/reduxjs/react-redux/pull/2066
• Make context typing more accurate by @​EskiMojo14 in https://github.com/reduxjs/react-redux/pull/2041
• Fix uSES imports and run against RTK CI examples by @​markerikson in https://github.com/reduxjs/react-redux/pull/2070
• Copy CI setup for RTK examples by @​markerikson in https://github.com/reduxjs/react-redux/pull/2072
• Fix useSelector() in combination with lazy loaded components breaks with react v18 (#​1977) by @​jeroenpx in https://github.com/reduxjs/react-redux/pull/2068
• Actually add sideEffects: "false" to package.json in v9 by @​markerikson in https://github.com/reduxjs/react-redux/pull/2079
• Inline react-is utils to fix tree-shaking in 9.0 by @​markerikson in https://github.com/reduxjs/react-redux/pull/2085
• Rename noopCheck to identityFunctionCheck by @​aryaemami59 in https://github.com/reduxjs/react-redux/pull/2091
• Use scoped JSX for React types by @​markerikson in https://github.com/reduxjs/react-redux/pull/2092

Full Changelog: reduxjs/react-redux@v8.1.2...v9.0.0

v8.1.3

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v8.1.2

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This version changes imports from the React package to namespace imports so the package can safely be imported in React Server Components as long as you don't actually use it - this is for example important if you want to use the React-specifc createApi function from Redux Toolkit.

Some other changes:

• The behaviour of the "React Context Singletons" from 8.1.1 has been adjusted to also work if you have multiple React instances of the same version (those will now be separated) and if you are in an environment without globalThis (in this case it will fall back to the previous behaviour).
• We do no longer use Proxies, which should help with some very outdated consumers, e.g. smart TVs, that cannot even polyfill Proxies.

Full Changelog: reduxjs/react-redux@v8.1.1...v8.1.2

v8.1.1

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This bugfix release tweaks the recent lazy context setup logic to ensure a single React context instance per React version, and removes the recently added RTK peerdep to fix an issue with Yarn workspaces.

Changelog

React Context Singletons

React Context has always relied on reference identity. If you have two different copies of React or a library in a page, that can cause multiple versions of a context instance to be created, leading to problems like the infamous "Could not find react-redux context" error.

In v8.1.0, we reworked the internals to lazily create our single ReactReduxContext instance to avoid issues in a React Server Components environment.

This release further tweaks that to stash a single context instance per React version found in the page, thus hopefully avoiding the "multiple copies of the same context" error in the future.

What's Changed

• fix: fix typescript error on non exported type by @​luzzif in https://github.com/reduxjs/react-redux/pull/2034
• create singleton context by React version by @​phryneas in https://github.com/reduxjs/react-redux/pull/2039
• remove RTK peerDep by @​markerikson in 44fc725

Full Changelog: reduxjs/react-redux@v8.1.0...v8.1.1

v8.1.0

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This feature release adds new development-mode safety checks for common errors (like poorly-written selectors), adds a workaround to fix crash errors when React-Redux hooks are imported into React Server Component files, and updates our hooks API docs page with improved explanations and updated links.

Changelog

Development Mode Checks for useSelector

We've had a number of users tell us over time that it's common to accidentally write selectors that have bad behavior and cause performance issues. The most common causes of this are either selectors that unconditionally return a new reference (such as state => state.todos.map() without any memoization ), or selectors that actually return the entire root state ( state => state ).

We've updated useSelector to add safety checks in development mode that warn if these incorrect behaviors are detected:

• Selectors will be called twice with the same inputs, and useSelector will warn if the results are different references
• useSelector will warn if the selector result is actually the entire root state

By default, these checks only run once the first time useSelector is called. This should provide a good balance between detecting possible issues, and keeping development mode execution performant without adding many unnecessary extra selector calls.

If you want, you can configure this behavior globally by passing the enum flags directly to <Provider>, or on a per-useSelector basis by passing an options object as the second argument:

// Example: globally configure the root state "noop" check to run every time
<Provider store={store} noopCheck="always">
  {children}
</Provider>

// Example: configure `useSelector` to specifically run the reference checks differently:
function Component() {
  // Disable check entirely for this selector
  const count = useSelector(selectCount, { stabilityCheck: 'never' })
  // run once (default)
  const user = useSelector(selectUser, { stabilityCheck: 'once' })
  // ...
}

This goes along with the similar safety checks we've added to Reselect v5 alpha as well.

Context Changes

We're still trying to work out how to properly use Redux and React Server Components together. One possibility is using RTK Query's createApi to define data fetching endpoints, and using the generated thunks to fetch data in RSCs, but it's still an open question.

However, users have reported that merely importing any React-Redux API in an RSC file causes a crash, because React.createContext is not defined in RSC files. RTKQ's React-specific createApi entry point imports React-Redux, so it's been unusable in RSCs.

This release adds a workaround to fix that issue, by using a proxy wrapper around our singleton ReactReduxContext instance and lazily creating that instance on demand. In testing, this appears to both continue to work in all unit tests, and fixes the import error in an RSC environment. We'd appreciate further feedback in case this change does cause any issues for anyone!

We've also tweaked the internals of the hooks to do checks for correct <Provider> usage when using a custom context, same as the default context checks.

Docs Updates

We've cleaned up some of the Hooks API reference page, and updated links to the React docs.

What's Changed

• check for Provider even when using custom context by @​EskiMojo14 in https://github.com/reduxjs/react-redux/pull/1990
• Add a stability check, to see if selector returns stable result when called with same parameters. by @​EskiMojo14 in https://github.com/reduxjs/react-redux/pull/2000
• Add an E2E-ish test that verifies behavior when imported into RSCs by @​markerikson in https://github.com/reduxjs/react-redux/pull/2030
• lazily create Context for RSC compat by @​phryneas in https://github.com/reduxjs/react-redux/pull/2025
• Add warning for selectors that return the entire state by @​EskiMojo14 in https://github.com/reduxjs/react-redux/pull/2022

Full Changelog: reduxjs/react-redux@v8.0.7...v8.1.0

v8.0.7

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This release updates the peer dependencies to accept Redux Toolkit, and accept the ongoing RTK and Redux core betas as valid peer deps.

Note: These changes were initially in 8.0.6, but that had a typo in the peer deps that broke installation. Sorry!

What's Changed

• Bump Redux peer deps to accept 5.0 betas, and bump RTK dev dep by @​markerikson in https://github.com/reduxjs/react-redux/pull/2017
• d45204f : Fix broken RTK peer dep

Full Changelog: reduxjs/react-redux@v8.0.5...v8.0.7

v8.0.6

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~~This release updates the peer dependencies to accept Redux Toolkit, and accept the ongoing RTK and Redux core betas as valid peer deps.~~

This release has a peer deps typo that breaks installation - please use 8.0.7 instead !

What's Changed

• Bump Redux peer deps to accept 5.0 betas, and bump RTK dev dep by @​markerikson in https://github.com/reduxjs/react-redux/pull/2017

Full Changelog: reduxjs/react-redux@v8.0.5...v8.0.6

v8.0.5

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This release fixes a few minor TS issues.

What's Changed

• Provider: pass state (S) generic through to ProviderProps by @​OliverJAsh in https://github.com/reduxjs/react-redux/pull/1960
• wrap equalityFn type in NoInfer by @​phryneas in https://github.com/reduxjs/react-redux/pull/1965
• Fix wrapped component prop types when passing nullish mapDispatchToProps by @​marconi1992 in https://github.com/reduxjs/react-redux/pull/1928

Full Changelog: reduxjs/react-redux@v8.0.4...v8.0.5

v8.0.4

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This patch release fixes some minor TS types issues, and updates the rarely-used areStatesEqual option for connect to now pass through ownProps for additional use in determining which pieces of state to compare if desired.

Note: 8.0.3 was accidentally published without one of these fixes. Use 8.0.4 instead.

Changelog

TS Fixes

We've fixed an import of React that caused issues with the allowSyntheticDefaultImports TS compiler flag in user projects.

connect already accepted a custom context instance as props.context, and had runtime checks in case users were passing through a real value with app data as props.context instead. However, the TS types did not handle that case, and this would fail to compile. If your own component expects props.context with actual data, connect's types now use that type instead.

The ConnectedProps<T> type had a mismatch with React's built-in React.ComponentProps<Component> type, and that should now work correctly.

Other Changes

The areStatesEqual option to connect now receives ownProps as well, in case you need to make a more specific comparison with certain sections of state.

The new signature is:

{
  areStatesEqual?: (
    nextState: State,
    prevState: State,
    nextOwnProps: TOwnProps,
    prevOwnProps: TOwnProps
  ) => boolean
}

What's Changed

• Don't require allowSyntheticDefaultImports: true by @​apepper in https://github.com/reduxjs/react-redux/pull/1924
• Fixed type issue with ComponentProps from older @types/react by @​Andarist in https://github.com/reduxjs/react-redux/pull/1956
• connect: pass ownProps to areStatesEqual by @​jspurlin in https://github.com/reduxjs/react-redux/pull/1951
• Omit built-in context prop if user component props include context by @​markerikson in https://github.com/reduxjs/react-redux/pull/1958

Full Changelog: reduxjs/react-redux@v8.0.2...v8.0.4

v8.0.3

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This release was accidentally published without an intended fix - please use v8.0.4 instead

v8.0.2

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This patch release tweaks the behavior of connect to print a one-time warning when the obsolete pure option is passed in, rather than throwing an error. This fixes crashes caused by libraries such as react-beautiful-dnd continuing to pass in that option (unnecessarily) to React-Redux v8.

What's Changed

• Show warning instead of throwing error that pure option has been removed by @​ApacheEx in https://github.com/reduxjs/react-redux/pull/1922

Full Changelog: reduxjs/react-redux@v8.0.1...v8.0.2

v8.0.1

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This release fixes an incorrect internal import of our Subscription type, which was causing TS compilation errors in some user projects. We've also listed @types/react-dom as an optional peerDep. There are no runtime changes in this release.

What's Changed

• Add optional peer dependency on @​types/react-dom by @​Methuselah96 in https://github.com/reduxjs/react-redux/pull/1904
• fix(ts): incorrect import of Subscription causes noImplicitAny error by @​vicrep in https://github.com/reduxjs/react-redux/pull/1910

Full Changelog: reduxjs/react-redux@v8.0.0...v8.0.1

v8.0.0

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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 deprecated connectAdvanced API and the pure option for connect.

npm i react-redux@latest

yarn add react-redux@latest

Overview, Compatibility, and Migration

Our public API is still the same ( <Provider>, connect and useSelector/useDispatch), but we've updated the internals to use the new useSyncExternalStore hook 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 connectAdvanced API, you will need to rewrite your code to avoid that, likely by using the hooks API instead. Similarly, the pure option for connect has 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@18 major version has changed component definitions to remove having children as a prop by default. This causes errors if you have multiple copies of @types/react in your project. To fix this, tell your package manager to resolve @types/react to 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 useSyncExternalStore API 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 useSyncExternalStore development effort. They specifically designed useSyncExternalStore to support the needs and use cases of React-Redux, and we used React-Redux v8 as a testbed for how useSyncExternalStore would behave and what it needed to cover. This in turn helped ensure that useSyncExternalStore would 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 connect and useSelector, so we do not anticipate any meaningful performance regressions.

useSyncExternalStore and Bundling

The useSyncExternalStore shim 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 /next entry point. This exports the exact same APIs, but directly imports useSyncExternalStore from 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 hydrateRoot method for hydrating the UI on the client in Server-Side Rendering usage. As part of that, the useSyncExternalStore API 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 serverState prop for <Provider>. If you're using SSR, you should pass your serialized state to <Provider> to ensure there are no hydration mismatch errors:

import { hydrateRoot } from 'react-dom/client'
import { configureStore } from '@​reduxjs/toolkit'
import { Provider } from 'react-redux'

const preloadedState = window.__PRELOADED_STATE__

const clientStore = configureStore({
  reducer: rootReducer,
  preloadedState,
})

hydrateRoot(
  document.getElementById('root'),
  <Provider store={clientStore} serverState={preloadedState}>
    <App />
  </Provider>
)

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-redux package is no longer needed, and you should remove that as a dependency.

Note Please ensure that any installed copies of redux and @types/react are de-duped. You are also encouraged to update to the latest versions of Redux Toolkit (1.8.1+) or Redux (4.1.2), to ensure consistency between installed types and avoid problems from types mismatches.

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 a Connect<State = unknown> type that can be used as a "pre-typed" version of connect as 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 DefaultRootState type

The @types/react-redux package, which has always been maintained by the community, included a DefaultRootState interface that was intended for use with TS's "module augmentation" capability. Both connect and useSelector used 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 RootState and AppDispatch types 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 DefaultRootState type entirely. State generics now default to unknown instead.

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/export keywords 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 connectAdvanced API 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 pure option for connect, which forced components to re-render regardless of whether props/state had actually changed if it was set to false. 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's useSyncExternalStore strictly requires immutable updates. So, we've removed the pure flag.

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:

• Integrate TypeScript port by @​markerikson in https://github.com/reduxjs/react-redux/pull/1739
• Initial experimental React 18 compat prototyping by @​markerikson in https://github.com/reduxjs/react-redux/pull/1808
• Fix compatibility with React 18 strict effects by @​markerikson in https://github.com/reduxjs/react-redux/pull/1817
• Update to latest React 18 alpha dependencies by @​markerikson in https://github.com/reduxjs/react-redux/pull/1834
• Port remaining v7 typetests and improve v8 types by @​markerikson in https://github.com/reduxjs/react-redux/pull/1855
• Add initial SSR support for React 18 and React-Redux v8 by @​markerikson in https://github.com/reduxjs/react-redux/pull/1835
• test: Adjust type tests to be compatible with React 18 typings by @​eps1lon in https://github.com/reduxjs/react-redux/pull/1868
• Switch back to Subscription in useSelector to fix unsubscribe perf by @​markerikson in https://github.com/reduxjs/react-redux/pull/1870
• Cleanup more code after pure removal by @​Andarist in https://github.com/reduxjs/react-redux/pull/1859
• Swap useSyncExternalStore shim behavior and update React deps by @​markerikson in https://github.com/reduxjs/react-redux/pull/1884
• Remove DefaultRootState type by @​markerikson in https://github.com/reduxjs/react-redux/pull/1887
• Add SSR test for serverState behavior by @​markerikson in https://github.com/reduxjs/react-redux/pull/1888
• Cleanup internal types in selectorFactory.ts by @​Methuselah96 in https://github.com/reduxjs/react-redux/pull/1889
• Remove ts-ignore for initMergeProps by @​Methuselah96 in https://github.com/reduxjs/react-redux/pull/1891
• fix(deps): add optional peer deps into peerDependencies by @​kyletsang in https://github.com/reduxjs/react-redux/pull/1893
• Update peer deps for v8 by @​markerikson in https://github.com/reduxjs/react-redux/pull/1895
• Port DT fix for dispatchProp arg in mergeProps by @​markerikson in https://github.com/reduxjs/react-redux/pull/1897
• Update docs for v8 final by @​markerikson in https://github.com/reduxjs/react-redux/pull/1902

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[jeanregisser]

To fix the TS issues, I added src/redux/hooks.ts with custom useDispatch and useSelector typed with our app Actions and RootState as recommended in the official documentation.

That's why the diff shows many file changed, but it's only switching the import.

Note: I kept the original names instead of useAppDispatch / useAppSelector, to avoid merge conflicts with ongoing changes.

[emerge-tools]

1 build decreased size

Name	Version	Download	Change	Install	Change	Approval
Celo (test) org.celo.mobile.test	1.79.0 (144)	24.2 MB	⬇️ 3.8 kB (-0.02%)	60.3 MB	⬇️ 4.1 kB	N/A

Celo (test) 1.79.0 (144)
org.celo.mobile.test

⚖️ Compare build
📦 Install build
⏱️ Analyze build performance

Total install size change: ⬇️ 4.1 kB
Total download size change: ⬇️ 3.8 kB (-0.02%)

Largest size changes

Item	Install Size Change
main.jsbundle	⬇️ -4.1 kB

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[jeanregisser]

This was needed to avoid the following error, when running jest:

/Users/jean/src/github.com/valora-inc/wallet/node_modules/react-redux/dist/react-redux.legacy-esm.js:34
    import * as React2 from "react";
    ^^^^^^

    SyntaxError: Cannot use import statement outside a module

[jeanregisser]

The types are now directly included in the react-redux package.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.48%. Comparing base (a19f1b3) to head (8e24420).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5025      +/-   ##
==========================================
- Coverage   85.49%   85.48%   -0.01%     
==========================================
  Files         723      723              
  Lines       29462    29437      -25     
  Branches     5099     5099              
==========================================
- Hits        25188    25164      -24     
+ Misses       4039     4038       -1     
  Partials      235      235              

Files	Coverage Δ
src/RevokePhoneNumber.tsx	98.00% <100.00%> (ø)
src/account/FiatExchange.tsx	72.72% <100.00%> (ø)
src/account/GoldEducation.tsx	83.33% <100.00%> (-0.46%)	⬇️
src/account/Persona.tsx	91.17% <100.00%> (ø)
src/account/Profile.tsx	78.08% <100.00%> (ø)
src/account/Settings.tsx	91.55% <100.00%> (ø)
src/account/ShakeForSupport.tsx	86.48% <100.00%> (ø)
src/account/StoreWipeRecoveryScreen.tsx	96.96% <100.00%> (ø)
src/account/SupportContact.tsx	96.29% <100.00%> (ø)
src/alert/AlertBanner.tsx	100.00% <100.00%> (ø)
... and 125 more

... and 1 file with indirect coverage changes

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[bakoushin]

🚀 Awesome!