Universal react application browser initialization

universal-react-app-browser-init.js

const initState = window.__STATE__;
delete window.__STATE__; // not needed anymore

// Create Redux store with initial state
const store = createStore(reducer.main, initState);
// start the app
window.initApp = (url) => {
  window.onload = () => {
    ReactDOM.render(
      <Provider store={store}>
        <BrowserRouter context={{}} location={url}>
          <App/>
        </BrowserRouter>
      </Provider>
      , document.getElementById('app'));
  };