How does Redux integrate with other state management libraries, like Apollo Client or MobX?
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Redux can be used alongside other state management libraries, like Apollo Client or MobX, by creating a separate store for each library and combining them using the combineReducers
function provided by the Redux library.
For example, if you are using Apollo Client to manage GraphQL data, you can create a separate store for Apollo Client and combine it with your Redux store as follows:
import { combineReducers } from 'redux';
import { ApolloClient, InMemoryCache } from '@apollo/client';
import { ApolloProvider } from '@apollo/client/react';
import { Provider } from 'react-redux';
import rootReducer from './reducers';
const apolloClient = new ApolloClient({
uri: 'https://my-graphql-api.com',
cache// Adding the Apollo Client cache to the store
const apolloCacheReducer = (state, action) => {
if (action.type === 'APOLLO_STATE_UPDATE') {
return { ...state, apollo: action.payload };
}
return state;
};
const store = createStore(
combineReducers({
apollo: apolloCacheReducer,
app: rootReducer,
}),
);
// Wrapping the app in the ApolloProvider
ReactDOM.render(
<Provider store={store}>
<ApolloProvider client={apolloClient}>
<App />
</ApolloProvider>
</Provider>,
document.getElementById('root'),
);
MobX can also be used alongside Redux by creating a separate MobX store and subscribing to changes in the MobX store from the Redux store using a middleware.
import { observable } from 'mobx';
import { createStore, applyMiddleware } from 'redux';
import rootReducer from './reducers';
const mobxStore = observable({
counter: 0,
increment() {
this.counter++;
},
});
const mobxMiddleware = (store) => (next) => (action) => {
if (action.type === 'INCREMENT') {
mobxStore.increment();
}
return next(action);
};
const store = createStore(rootReducer, applyMiddleware(mobxMiddleware));
mobxStore.counterReaction = () => {
store.dispatch({ type: 'COUNTER_UPDATED', payload: mobxStore.counter });
};
mobxStore.counterReaction();
mobxStore.counter = 1;
In this example, the MobX store is used to manage a counter, and a middleware is used to intercept Redux actions and modify the MobX store when necessary. A reaction is also defined on the MobX store, which dispatches a Redux action when the counter is updated.