react-route-4-layout.js

import React, { Component } from 'react';
import { BrowserRouter as Router, Route } from 'react-router-dom'

import Layout from './components/layout/Layout'


import Home from './components/Home'
import Explore from './components/Explore'
import Profile from './components/Profile'


class App extends Component {
  render() {
    return (
      <Router>
        <span>
          <Layout>
            <Route exact path="/" component={Home}/>
            <Route path="/explore" component={Explore}/>
            <Route path="/profile" component={Profile}/>
          </Layout>
        </span>
      </Router>
    );
  }
}

export default App;