React Base Fiddle (JSX)

Starting point for creating JSFiddles with React. This uses React with Addons.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.24/browser.js"></script>
<script src="https://npmcdn.com/react@latest/dist/react-with-addons.js"></script>
<script src="https://npmcdn.com/react-dom@latest/dist/react-dom.js"></script>
<script src="https://unpkg.com/react-router-dom/umd/react-router-dom.min.js"></script>
<script src="https://unpkg.com/react-router/umd/react-router.min.js"></script>
<script src="https://facebook.github.io/react/js/jsfiddle-integration-babel.js"></script>

<div id="container">
    <!-- This element's contents will be replaced with your component. -->
</div>

JavaScript 1.7

class Layout extends React.Component{
    render(){
        return (
            <div>
               {this.props.children}
<div>Hello</div>
            </div>
        );
    }
}

const SideBar = () =>(<div>Sidebar</div>);

const Router =ReactRouterDOM.BrowserRouter;
const Route = ReactRouterDOM.Route;
const Link = ReactRouterDOM.Lik;

const App = () =>(
  <Router>
<Layout>
<div>
<Route path="/" render={ () => <div><SideBar/> content</div>} />
<Route path="/user" render={ () => <SideBar/>} />
<Route path="/edit" render={ () => <SideBar/>} />
<ul>
<li><Link to="/about">About</Link></li>
</ul>
</div>

</Layout>
</Router>
)

ReactDOM.render(
  <App/>,
  document.getElementById('container')
);