import {createStore, applyMiddleware} from "redux";
import { composeWithDevTools } from 'redux-devtools-extension/developmentOnly';

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 = composeWithDevTools(...storeEnhancers);

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

    if(process.env.NODE_ENV !== "production") {
        if(module.hot) {
            module.hot.accept("../reducers/rootReducer", () =>{
                const newRootReducer = require("../reducers/rootReducer").default;
                store.replaceReducer(newRootReducer)
            });
        }
    }

    return store;
}
import {createStore, applyMiddleware} from "redux";
import { composeWithDevTools } from 'redux-devtools-extension/developmentOnly';

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 = composeWithDevTools(...storeEnhancers);

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

    return store;
}
--- 
+++ 
@@ -19,14 +19,5 @@
         composedEnhancer
     );
 
-    if(process.env.NODE_ENV !== "production") {
-        if(module.hot) {
-            module.hot.accept("../reducers/rootReducer", () =>{
-                const newRootReducer = require("../reducers/rootReducer").default;
-                store.replaceReducer(newRootReducer)
-            });
-        }
-    }
-
     return store;
 }
Configure Hot Module Replacement for the reducer logic
