title: Attempted import error: './redux/reducers/configureStore' does not contain a default export (imported as 'configureStore')
body: <p>I'm starting learn React + Redux , I'm doing a simple application for add or remove a counter .</p>
  <p>But I have a problem on a reducer . I try a lot of things without result...</p>
  <p>Thanks in advance :)</p>
  <p>Here is my code :</p>
  <p>The reducer :</p>
  <pre><code>import * as actionTypes from &quot;../actions/actionTypes&quot;
  
  
  const counterReducer=(state=0,action)=&gt;{
   let newState;
  switch (action.type) {
     case actionTypes.INCREASE_COUNTER:
         return (newState=state+action.payload);
         
         case actionTypes.DECREASE_COUNTER:
          return (newState=state-action.payload);
  
          case actionTypes.INCREASE_BY_TWO_COUNTER:
              return (newState=state+action.payload);
               
  
     default:
      return state;
  }
  
  };
  
  export default counterReducer;
  </code></pre>
  <p>The connection of the reducer ( I know it's not useless but in the furtur will have to combine reducer ) :</p>
  <pre><code>import { combineReducers } from &quot;redux&quot;;
  import counterReducer from &quot;./counterReducer&quot;;
  
  const reducers=combineReducers({
   counterReducer
  });
  
  
  export default reducers;
  </code></pre>
  <p>index.js :</p>
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import './index.css';
  import App from './App';
  import reportWebVitals from './reportWebVitals';
  import configureStore from './redux/reducers/configureStore';
  import {Provider}  from &quot;react-redux&quot;;
  
  
  const store=configureStore
  
  ReactDOM.render(
  &lt;React.StrictMode&gt;
  &lt;Provider store={store}&gt;
  &lt;App /&gt;
  &lt;/Provider&gt;
  
  &lt;/React.StrictMode&gt;,
  document.getElementById('root')
   );
  </code></pre>