@thinkeloquent/react-app-shell

import reactAppBootstrap from './react-app-shell';
import Shell from './shell';
Shell.hotReloadAccept = './shell';

const shell = reactAppBootstrap(document.getElementById('root'));
const app = shell(Shell);

app({
  a: 2
});

import React from 'react';

const Shell = (appState) => {
  return (
    <div className="container">
      <h1>hello</h1>
      <p>Some children here...</p>
    </div>
  )
}

export default Shell;