It is possible to customize Redux configuration provided by Rematch. To do that, provide your own configuration to the Rematch init method as config.redux property.


This section is likely not helpful for you unless you are migrating from plain Redux, building your own plugin or adding middleware.


If you just need to include a redux library in your store, see the recipe for redux plugins.


Configuration for Redux can be build using the following properties:

  • [initialState] (any): the initialState of your app. This is likely not necessary, as the state of your models will overwrite the initial state.

  • [reducers] ({ [string]: (state, payload) => any }): allows passing in reducer functions which are not part of a model. While not recommended, this can be used for migrating a Redux codebase or configuring different Redux extensions.

  • [enhancers] (Redux.StoreEnhancer): add enhancers to your store.

  • [middlewares] (Redux.Middleware): add middleware to your store.

  • [rootReducers] ({ [string]: (state, payload) => any }): a way to setup middleware hooks at the base of your root reducer. Unlike middleware, the return value is the next state. If undefined, the state will fallback to the initial state of reducers.

  • [combineReducers] (reducers => reducer): allows to overwrite Redux's combineReducers method.

  • [createStore] (Redux.StoreCreator): allows to overwrite Redux's createStore method.

  • [devtoolOptions] (Redux.DevtoolOptions): provides access to React Devtools options.


import { init } from '@rematch/core';
const store = init({
redux: {
initialState: {example: 12},
reducers: {
someReducer(state, action) {
switch (action.type) {
return state
enhancers: [customEnhancer()],
middlewares: [customMiddleware()],
rootReducers: {
RESET: (state, action) => {},
combineReducers: customCombineReducers,
createStore: customCreateStore,
devtoolOptions: customDevtoolOptions,