js_react__react-router-tutorial/modules/routes.js

import React from "react";
import { IndexRoute, Route } from "react-router";

import About from "./About";
import App from "./App";
import Home from "./Home";
import Repos from "./Repos";
import Repo from "./Repo";

module.exports = (
  <Route path="/" component={App}>
    <IndexRoute component={Home} />
    <Route path="/repos" component={Repos}>
      <Route path="/repos/:userName/:repoName" component={Repo} />
    </Route>
    <Route path="/about" component={About} />
  </Route>
);