import React from 'react';
import {Route} from 'react-router-dom';
import Hello from '../Hello';

const Routers = ()=> (
    <Route exact path="/" component={Hello}></Route>
)

export default Routers;

import React from 'react';
import { render } from 'react-dom';
import {Router } from 'react-router-dom';
import createHistory from 'history/createBrowserHistory';
import Routers from './router/router';

const history = createHistory();


render(
      <Router routes={Routers} history={history}></Router>

  , document.getElementById('root'));