redux-devtools/packages/redux-devtools-rtk-query-monitor/demo/src/store.ts

import {
  configureStore,
  Middleware,
  combineReducers,
  EnhancedStore,
} from '@reduxjs/toolkit';
import { pokemonApi } from './services/pokemon';
import { postsApi } from 'services/posts';
import DevTools from './features/DevTools/DevTools';
import { isExtensionEnabled } from 'features/DevTools/helpers';

const devTools = isExtensionEnabled();

const reducer = combineReducers({
  [pokemonApi.reducerPath]: pokemonApi.reducer,
  [postsApi.reducerPath]: postsApi.reducer,
});

export const store: EnhancedStore<ReturnType<typeof reducer>> = configureStore({
  reducer,
  devTools,
  // adding the api middleware enables caching, invalidation, polling and other features of `rtk-query`
  middleware: (getDefaultMiddleware) =>
    getDefaultMiddleware().concat([
      pokemonApi.middleware,
      postsApi.middleware,
    ]) as Middleware[],
  enhancers: (devTools ? [] : [DevTools.instrument()]) as any,
});