TypeError: Cannot read property ‘getState’ of undefined

Question

I want to try small redux example so I installed redux but I got this error

TypeError: Cannot read property ‘getState’ of undefined

new Provider webpack-internal:///./node_modules/react-redux/es/components/Provider.js:24:25

Code:

import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';

import './index.css';

const App = () => (<div>Hi </div>);

ReactDOM.render(<Provider><App /></Provider>, document.getElementById('root'));

What is wrong ?

Answer 1

If we look inside react-redux <Provider />

<Provider /> expects to be provided a store prop:

this.state = {
  storeState: store.getState(),
                   ^^here
  store
}

Hence the error.

You can create one, though, using a reducer, should be something similar to this:

import React from 'react'
import { render } from 'react-dom'
import { Provider } from 'react-redux'
import { createStore } from 'redux'
import reducer from './reducer'
import App from './components/App'

const store = createStore(reducer)

render(
  <Provider store={store}>
    <App />
  </Provider>,
  document.getElementById('root')
)