import {createStore, applyMiddleware} from 'redux'; import {composeWithDevTools} from 'redux-devtools-extension'; import thunk from 'redux-thunk'; import mainReducer from './reducers/main-reducer'; //your reducer const composeEnhancers = composeWithDevTools({realtime: true, port: 8081}); //possible to run without arguments const store = createStore( mainReducer, composeEnhancers(applyMiddleware(thunk)), ); export default store;