gistfile1.txt

import {createStore} from 'redux'
import {Provider} from 'react-redux'
import Header from './Header'

const initialState = {username : "Farshid"};

const returnStateReducer = (state= initialState, action) =>{

  if(action.type === "updateUser"){
    return {...state, username : "Farhad"};
  }else if(action.type === "updateMyName"){
    return {...state, username : action.payload};
  }else {
    return state;
  }

}

const store =createStore(returnStateReducer);

const App= () => {

  return (
    <Provider store={store}>
      <div>
        <Header/>
        <h1>Hello  World</h1>
      </div>
    </Provider>
  )
}


export default  App;