docs/introduction/Ecosystem.md
Redux is a tiny library, but its contracts and APIs are carefully chosen to spawn an ecosystem of tools and extensions, and the community has created a wide variety of helpful addons, libraries, and tools. You don't need to use any of these addons to use Redux, but they can help make it easier to implement features and solve problems in your application.
For an extensive catalog of libraries, addons, and tools related to Redux, check out the Redux Ecosystem Links list. Also, the React/Redux Links list contains tutorials and other useful resources for anyone learning React or Redux.
This page lists some of the Redux-related addons that the Redux maintainers have vetted personally, or that have shown widespread adoption in the community. Don't let this discourage you from trying the rest of them! The ecosystem is growing too fast, and we have a limited time to look at everything. Consider these the “staff picks”, and don't hesitate to submit a PR if you've built something wonderful with Redux.
The official React bindings for Redux, maintained by the Redux team
Angular 1 bindings for Redux
Ember bindings for Redux
Redux bindings for Ember's Glimmer component engine
Redux bindings for Polymer
lastmjs/redux-store-element Redux bindings for custom elements
An expanded version of combineReducers, which allows passing state as a third argument to all slice reducers.
KodersLab/topologically-combine-reducers
A combineReducers variation that allows defining cross-slice dependencies for ordering and data passing
var masterReducer = topologicallyCombineReducers(
{ auth, users, todos },
// define the dependency tree
{ auth: ['users'], todos: ['auth'] }
)
Provides sequential composition of reducers at the same level
const combinedReducer = combineReducers({ users, posts, comments })
const rootReducer = reduceReducers(combinedReducer, otherTopLevelFeatureReducer)
A collection of composable reducer transformers
const createByFilter = (predicate, mapActionToKey) =>
compose(
withInitialState({}), // inject initial state as {}
withFilter(predicate), // let through if action has filterName
updateSlice(mapActionToKey), // update a single key in the state
isolateSlice(mapActionToKey) // run the reducer on a single state slice
)
adrienjt/redux-data-structures
Reducer factory functions for common data structures: counters, maps, lists (queues, stacks), sets
const myCounter = counter({
incrementActionTypes: ['INCREMENT'],
decrementActionTypes: ['DECREMENT']
})
Effortless undo/redo and action history for your reducers
Ignore redux actions by array or filter function
Reset the redux state on certain actions
A reducer enhancer to enable type-agnostic optimistic updates
Creates composable memoized selector functions for efficiently deriving data from the store state
const taxSelector = createSelector(
[subtotalSelector, taxPercentSelector],
(subtotal, taxPercent) => subtotal * (taxPercent / 100)
)
Normalizes nested JSON according to a schema
const user = new schema.Entity('users')
const comment = new schema.Entity('comments', { commenter: user })
const article = new schema.Entity('articles', {
author: user,
comments: [comment]
})
const normalizedData = normalize(originalData, article)
Abstractions over Reselect for common selector use cases
const getBarBaz = createSelector(
['foo.bar', 'baz'],
(bar, baz) => `${bar} ${baz}`
)
getBarBaz({ foo: { bar: 'a' }, baz: 'b' }) // "a b"
Watch for state changes based on key paths or selectors
let w = watch(() => mySelector(store.getState()))
store.subscribe(
w((newVal, oldVal) => {
console.log(newval, oldVal)
})
)
Centralized subscriptions to state changes based on paths
store.dispatch( subscribe("users.byId.abcd", "subscription1", () => {} );
tappleby/redux-batched-subscribe
Store enhancer that can debounce subscription notifications
const debounceNotify = _.debounce(notify => notify())
const store = configureStore({
reducer,
enhancers: [batchedSubscribe(debounceNotify)]
})
Store enhancer that allows dispatching arrays of actions
const store = configureStore({
reducer,
enhancers: existingEnhancersArray => [
reduxBatch,
...existingEnhancersArray,
reduxBatch
]
})
store.dispatch([{ type: 'INCREMENT' }, { type: 'INCREMENT' }])
laysent/redux-batch-actions-enhancer
Store enhancer that accepts batched actions
const store = configureStore({ reducer, enhancers: [batch().enhancer] })
store.dispatch(createAction({ type: 'INCREMENT' }, { type: 'INCREMENT' }))
tshelburne/redux-batched-actions
Higher-order reducer that handles batched actions
const store = configureStore({ reducer: enableBatching(rootReducer) })
store.dispatch(batchActions([{ type: 'INCREMENT' }, { type: 'INCREMENT' }]))
Persist and rehydrate a Redux store, with many extensible options
const persistConfig = { key: 'root', version: 1, storage }
const persistedReducer = persistReducer(persistConfig, rootReducer)
export const store = configureStore({
reducer: persistedReducer,
middleware: getDefaultMiddleware =>
getDefaultMiddleware({
serializableCheck: {
ignoredActions: [FLUSH, REHYDRATE, PAUSE, PERSIST, PURGE, REGISTER]
}
})
})
export const persistor = persistStore(store)
Persistence layer for Redux with flexible backends
const reducer = storage.reducer(combineReducers(reducers))
const engine = createEngineLocalStorage('my-save-key')
const storageMiddleware = storage.createMiddleware(engine)
const store = configureStore({
reducer,
middleware: getDefaultMiddleware =>
getDefaultMiddleware.concat(storageMiddleware)
})
Persistent store for Offline-First apps, with support for optimistic UIs
const store = configureStore({ reducer, enhancer: [offline(offlineConfig)] })
store.dispatch({
type: 'FOLLOW_USER_REQUEST',
meta: { offline: { effect: {}, commit: {}, rollback: {} } }
})
Immutable updates with normal mutative code, using Proxies
const nextState = produce(baseState, draftState => {
draftState.push({ todo: 'Tweet about it' })
draftState[1].done = true
})
Dispatch functions, which are called and given dispatch and getState as parameters. This acts as a loophole for AJAX calls and other async behavior.
Best for: getting started, simple async and complex synchronous logic.
function fetchData(someValue) {
return (dispatch, getState) => {
dispatch({type : "REQUEST_STARTED"});
myAjaxLib.post("/someEndpoint", {data : someValue})
.then(response => dispatch({type : "REQUEST_SUCCEEDED", payload : response})
.catch(error => dispatch({type : "REQUEST_FAILED", error : error});
};
}
function addTodosIfAllowed(todoText) {
return (dispatch, getState) => {
const state = getState();
if(state.todos.length < MAX_TODOS) {
dispatch({type : "ADD_TODO", text : todoText});
}
}
}
listenerMiddleware (Redux Toolkit)
listenerMiddleware is intended to be a lightweight alternative to more widely used Redux async middleware like sagas and observables. While similar to thunks in level of complexity and concept, it can be used to replicate some common saga usage patterns.
listenerMiddleware.startListening({
matcher: isAnyOf(action1, action2, action3),
effect: (action, listenerApi) => {
const user = selectUserDetails(listenerApi.getState())
const { specialData } = action.meta
analyticsApi.trackUsage(action.type, user, specialData)
}
})
Handle async logic using synchronous-looking generator functions. Sagas return descriptions of effects, which are executed by the saga middleware, and act like "background threads" for JS applications.
Best for: complex async logic, decoupled workflows
function* fetchData(action) {
const { someValue } = action
try {
const response = yield call(myAjaxLib.post, '/someEndpoint', {
data: someValue
})
yield put({ type: 'REQUEST_SUCCEEDED', payload: response })
} catch (error) {
yield put({ type: 'REQUEST_FAILED', error: error })
}
}
function* addTodosIfAllowed(action) {
const { todoText } = action
const todos = yield select(state => state.todos)
if (todos.length < MAX_TODOS) {
yield put({ type: 'ADD_TODO', text: todoText })
}
}
redux-observable/redux-observable
Handle async logic using RxJS observable chains called "epics". Compose and cancel async actions to create side effects and more.
Best for: complex async logic, decoupled workflows
const loginRequestEpic = action$ =>
action$
.ofType(LOGIN_REQUEST)
.mergeMap(({ payload: { username, password } }) =>
Observable.from(postLogin(username, password))
.map(loginSuccess)
.catch(loginFailure)
)
const loginSuccessfulEpic = action$ =>
action$
.ofType(LOGIN_SUCCESS)
.delay(2000)
.mergeMap(({ payload: { msg } }) => showMessage(msg))
const rootEpic = combineEpics(loginRequestEpic, loginSuccessfulEpic)
A port of the Elm Architecture to Redux that allows you to sequence your effects naturally and purely by returning them from your reducers. Reducers now return both a state value and a side effect description.
Best for: trying to be as much like Elm as possible in Redux+JS
export const reducer = (state = {}, action) => {
switch (action.type) {
case ActionType.LOGIN_REQUEST:
const { username, password } = action.payload
return loop(
{ pending: true },
Effect.promise(loginPromise, username, password)
)
case ActionType.LOGIN_SUCCESS:
const { user, msg } = action.payload
return loop(
{ pending: false, user },
Effect.promise(delayMessagePromise, msg, 2000)
)
case ActionType.LOGIN_FAILURE:
return { pending: false, err: action.payload }
default:
return state
}
}
Side effects lib built with observables, but allows use of callbacks, promises, async/await, or observables. Provides declarative processing of actions.
Best for: very decoupled async logic
const loginLogic = createLogic({
type: Actions.LOGIN_REQUEST,
process({ getState, action }, dispatch, done) {
const { username, password } = action.payload
postLogin(username, password)
.then(
({ user, msg }) => {
dispatch(loginSucceeded(user))
setTimeout(() => dispatch(showMessage(msg)), 2000)
},
err => dispatch(loginFailure(err))
)
.then(done)
}
})
Dispatch promises as action payloads, and have FSA-compliant actions dispatched as the promise resolves or rejects.
dispatch({ type: 'FETCH_DATA', payload: myAjaxLib.get('/data') })
// will dispatch either {type : "FETCH_DATA", payload : response} if resolved,
// or dispatch {type : "FETCH_DATA", payload : error, error : true} if rejected
Sensible, declarative, convention-based promise handling that guides users in a good direction without exposing the full power of dispatch.
dispatch({type : "FETCH_DATA", payload : myAjaxLib.get("/data") });
// in a reducer:
case "FETCH_DATA": =
return handle(state, action, {
start: prevState => ({
...prevState,
isLoading: true,
fooError: null
}),
finish: prevState => ({ ...prevState, isLoading: false }),
failure: prevState => ({ ...prevState, fooError: payload }),
success: prevState => ({ ...prevState, foo: payload }),
});
svrcekmichal/redux-axios-middleware
Fetches data with Axios and dispatches start/success/fail actions
export const loadCategories() => ({ type: 'LOAD', payload: { request : { url: '/categories'} } });
Reads API call actions, fetches, and dispatches FSAs
const fetchUsers = () => ({
[CALL_API]: {
endpoint: 'http://www.example.com/api/users',
method: 'GET',
types: ['REQUEST', 'SUCCESS', 'FAILURE']
}
})
An opinionated connector between socket.io and redux.
const store = configureStore({
reducer,
middleware: getDefaultMiddleware =>
getDefaultMiddleware.concat(socketIoMiddleware)
})
store.dispatch({ type: 'server/hello', data: 'Hello!' })
Integration between Firebase, React, and Redux
Buffers all actions into a queue until a breaker condition is met, at which point the queue is released
FSA-compliant middleware for Redux to debounce actions.
mathieudutour/redux-queue-offline
Queue actions when offline and dispatch them when getting back online.
Integrates with any analytics services, can track while offline, and decouples analytics logic from app logic
Watches for Flux Standard Actions with meta analytics values and processes them
A simple immutable ORM to manage relational data in your Redux store.
Convention-based actions and reducers for CRUD logic
A higher-order reducer that handles data from Normalizr
Declare colocated data dependencies with your components, run queries when components mount, perform optimistic updates, and trigger server changes with Redux actions.
Declarative JSON-API interaction that normalizes data, with a React HOC that can run queries
Async CRUD handling with normalization, optimistic updates, sync/async action creators, selectors, and an extendable reducer.
JSON-API abstraction with async CRUD, normalization, optimistic updates, caching, data status, and error handling.
A tiny but powerful system for managing 'resources': data that is persisted to remote servers.
threepointone/redux-react-local
Local component state in Redux, with handling for component actions
@local({
ident: 'counter', initial: 0, reducer : (state, action) => action.me ? state + 1 : state }
})
class Counter extends React.Component {
Makes component state in Redux as easy as setState
const DynamicCounters = connectLean(
scope: "dynamicCounters",
getInitialState() => ({counterCount : 1}),
addCounter, removeCounter
)(CounterList);
Aims to make reusable components easier to build with Redux by scoping actions and reducers to a particular instance of a component.
const scopeableActions = new ScopedActionFactory(actionCreators)
const actionCreatorsScopedToA = scopeableActions.scope('a')
actionCreatorsScopedToA.foo('bar') //{ type: SET_FOO, value: 'bar', scopeID: 'a' }
const boundScopeableActions = bindScopedActionFactories(
scopeableActions,
store.dispatch
)
const scopedReducers = scopeReducers(reducers)
Dan Abramov's original Redux DevTools implementation, built for in-app display of state and time-travel debugging
zalmoxisus/redux-devtools-extension
Mihail Diordiev's browser extension, which bundles multiple state monitor views and adds integration with the browser's own dev tools
A cross-platform Electron app for inspecting React and React Native apps, including app state, API requests, perf, errors, sagas, and action dispatching.
The default monitor for Redux DevTools with a tree view
A resizable and movable dock for Redux DevTools monitors
A custom monitor for Redux DevTools to replay recorded Redux actions
A monitor for Redux DevTools that diffs the Redux store mutations between actions
Filterable tree view monitor for Redux DevTools
Redux DevTools composable monitor with the ability to filter actions
Logging middleware that shows actions, states, and diffs
inakianduaga/redux-state-history
Enhancer that provides time-travel and efficient action recording capabilities, including import/export of action logs and action playback.
Record and replay user sessions in real-time
socialtables/redux-unhandled-action
Warns about actions that produced no state changes in development
leoasis/redux-immutable-state-invariant
Middleware that throws an error when you try to mutate your state either inside a dispatch or between dispatches.
Helps you deeply detect mutations at runtime and enforce immutability in your codebase.
Check and log whether react-redux's connect method is passed mapState functions that create impure props.
A mock store that saves dispatched actions in an array for assertions
Extends the store API to make it easier assert, isolate, and manipulate the store
conorhastings/redux-test-recorder
Middleware to automatically generate reducers tests based on actions in the app
Complete and opinionated testkit for testing Redux projects (reducers, selectors, actions, thunks)
jfairbank/redux-saga-test-plan
Makes integration and unit testing of sagas a breeze
supasate/connected-react-router Synchronize React Router v4+ state with your Redux store.
faceyspacey/redux-first-router
Seamless Redux-first routing. Think of your app in states, not routes, not components, while keeping the address bar in sync. Everything is state. Connect your components and just dispatch flux standard actions.
A full-featured library to enable a React HTML form to store its state in Redux.
React Redux Form is a collection of reducer creators and action creators that make implementing even the most complex and custom forms with React and Redux simple and performant.
An abstraction over Redux, Redux-Saga and Reselect. Provides a framework for your app’s actions, reducers, selectors and sagas. It empowers Redux, making it as simple to use as setState. It reduces boilerplate and redundancy, while retaining composability.
Takes a defined structure and uses 'behaviors' to create a set of actions, reducer responses and selectors.
Provides minimal abstraction on top of Redux, to allow easy composability, easy async requests, and sane testability.
A human-friendly standard for Flux action objects
An opinionated standard for nested reducer composition
A proposal for bundling reducers, action types and actions