serviceworker

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import { Provider } from 'react-redux';
import reportWebVitals from './reportWebVitals';
import { applyMiddleware, createStore } from 'redux';
import promiseMiddleware from 'redux-promise';
import ReduxThunk from 'redux-thunk';
import Reducer from './_reducers'

const createStoreWithMiddleware = applyMiddleware(promiseMiddleware, ReduxThunk)(createStore);

ReactDOM.render(
  <Provider
    store={createStoreWithMiddleware(Reducer,
      window.__REDUX_DEVTOOLS_EXTENSION__ &&
      window.__REDUX_DEVTOOLS_EXTENSION__()
    )}
  >
    <App />
  </Provider>,
  document.getElementById('root')
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();

저는 강사님 소스코드랑 다르게 serviceWoker가 아니라

reportwebVitals가 import 문이랑 맨 밑에도 있는데 뭐가 문제고 어떻게 해야 하죠..?

인프런 커뮤니티 질문&답변