React Router failed prop 'history', is undefined

Question

I've been following along Tyler Mcginnis' tutorial and hit a snag with the react router, specifically with history. I ended up copying his code verbatim just to see if it was only me, but I'm still getting

Warning: React.createElement: type is invalid -- expected a string (for built-
in components) or a class/function (for composite components) but got:
undefined. You likely forgot to export your component from the file it's 
defined in.

Warning: Failed prop type: The prop `history` is marked as required in 
`Router`, but its value is `undefined`. in Router

Uncaught TypeError: Cannot read property 'location' of undefined
at new Router (index_bundle.js:8347)
at index_bundle.js:19079
at measureLifeCyclePerf (index_bundle.js:18859)
at ReactCompositeComponentWrapper._constructComponentWithoutOwner (index_bundle.js:19078)
at ReactCompositeComponentWrapper._constructComponent (index_bundle.js:19064)
at ReactCompositeComponentWrapper.mountComponent (index_bundle.js:18972)
at Object.mountComponent (index_bundle.js:4070)
at ReactCompositeComponentWrapper.performInitialMount (index_bundle.js:19155)
at ReactCompositeComponentWrapper.mountComponent (index_bundle.js:19042)
at Object.mountComponent (index_bundle.js:4070)

The implementation is:

var React = require('react');
var ReactRouter = require('react-router');
var Router = ReactRouter.Router;
var Route = ReactRouter.Route;
var hashHistory = ReactRouter.hashHistory;
var IndexRoute = ReactRouter.IndexRoute;
var Main = require('../components/Main');
var Home = require("../components/Home");
var PromptContainer = require('../containers/PromptContainer');

var routes = (
  <Router history={hashHistory}>
    <Route path='/' component={Main}>
      <IndexRoute component={Home} />
      <Route path='playerOne' header='Player One' component={PromptContainer} />
      <Route path='playerTwo/:playerOne' header='Player Two' component={PromptContainer} />
    </Route>
  </Router>
);

module.exports = routes;

What I noticed was that hashHistory doesn't exist in the react-router module, but rather there is a createBrowserHistory inside the history module. Following the API doc I found, I figured I must call it through there as:

var BrowserHistory = require('history/createBrowserHistory);
const history = createBrowserHistory();

Doing that produces an createBrowserHistory is not a function error. Removing paranthesis, results in the same errors above stating history is undefined.

When I log history, it's definitely undefined, which makes me believe the issue has to do with the import statement, but wouldn't the console tell me ReactRouter.hashHistory could not be found?

I understand this tutorial is a year old and there have probably been changes to the API I just not aware of, and that's where my issue lies. Any help is appreciated!

Answer 1

Router v4 is a little bit different

HashHistory

import { HashRouter as Router, Route } from 'react-router-dom'; 
import App from './components/App'; 

render(( 
  <Router> 
    <Route exact path="/" component={App} /> 
  </Router> ), 
document.getElementById('root'));

or BrowserHistory

import { BrowserRouter as Router, Route } from 'react-router-dom'; 
import App from './components/App'; 

render(( 
  <Router> 
    <Route exact path="/" component={App} /> 
  </Router> ), 
document.getElementById('root'));