[MicroFrontend Workshop 1] App Component

app.js

/**
 * app.js
 *
 * This is the entry file for the application, only setup and boilerplate
 * code.
 */

// Needed for redux-saga es6 generator support
import '@babel/polyfill';

// Import all the third party stuff
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import FontFaceObserver from 'fontfaceobserver';
import defaultHistory from 'utils/history';
import 'sanitize.css/sanitize.css';

// Import root app
import App from 'containers/App';

// Load the favicon and the .htaccess file
import '!file-loader?name=[name].[ext]!./images/favicon.ico';
import 'file-loader?name=.htaccess!./.htaccess'; // eslint-disable-line import/extensions

import configureStore from './configureStore';

// Observe loading of Open Sans (to remove open sans, remove the <link> tag in
// the index.html file and this observer)
const openSansObserver = new FontFaceObserver('Open Sans', {});

// When Open Sans is loaded, add a font-family using Open Sans to the body
openSansObserver.load().then(() => {
  document.body.classList.add('fontLoaded');
});

// Create redux store with history
const initialState = {};
// const store = configureStore(initialState, defaultHistory);

const NAME = 'Dogs';

const render = (containerId, history) => {
  const store = configureStore(initialState, history);
  const MOUNT_NODE = document.getElementById(containerId);
  ReactDOM.render(
    <Provider store={store}>
      <App history={history} />
    </Provider>,
    MOUNT_NODE,
  );
};

const unmount = containerId => {
  const UNMOUNT_NODE = document.getElementById(containerId);
  ReactDOM.unmountComponentAtNode(UNMOUNT_NODE);
};

window[`render${NAME}`] = render;
window[`unmount${NAME}`] = unmount;

if (!document.getElementById(`${NAME}-container`)) {
  if (module.hot) {
    // Hot reloadable React components and translation json files
    // modules.hot.accept does not accept dynamic dependencies,
    // have to be constants at compile-time
    module.hot.accept(['containers/App'], () => {
      unmount('app');
      render('app', defaultHistory);
    });
  }

  render('app', defaultHistory);
}

// Install ServiceWorker and AppCache in the end since
// it's not most important operation and if main code fails,
// we do not want it installed
if (process.env.NODE_ENV === 'production') {
  require('offline-plugin/runtime').install(); // eslint-disable-line global-require
}