configureStore.js

import {createStore, applyMiddleware, compose} from "redux";

import thunk from "redux-thunk";

import rootReducer from "../reducers/rootReducer";

export default function configureStore(preloadedState) {
    const middlewares = [thunk];
    const middlewareEnhancer = applyMiddleware(...middlewares);

    const storeEnhancers = [middlewareEnhancer];
    
    const composedEnhancer = compose(...storeEnhancers);

    const store = createStore(
        rootReducer,
        preloadedState,
        composedEnhancer
    );

    return store;
}