A Egghead tutorial teaches it like this:
var React = require(\'react\');
var Router = require(\'react-router\');
var routes = require(\'./config/routes\');
Since the release of React Router v1.0, the run
method has been removed, these breaking changes are documented in the upgrade guide. Your code would roughly translate to this:
ReactDOM.render(<Router>{routes}</Router>, document.getElementById('app'))
https://github.com/rackt/react-router/blob/832c42946c874fe56ffde0066b1088054311cb98/CHANGES.md