import React, { Component } from 'react'; import { BrowserRouter as Router, Route, Link, Switch } from 'react-router-dom' const flowers = [ {id: 1, name: "ひまわり"}, {id: 2, name: "たんぽぽ"}, {id: 3, name: "バラ"} ] const App = () => ( <Router> <div> <Switch> <Route exact path="/" component={FlowerLists} /> <Route path='/flower/:id' component={OneFlower} /> <Route component={NoContents} /> </Switch> </div