loadable-components-server-tree.js

import React from 'react'
import { renderToString } from 'react-dom/server'
import { StaticRouter } from 'react-router'
import { getLoadableState } from 'loadable-components/server'
import App from './App'

const app = (
  <StaticRouter>
    <App />
  </StaticRouter>
)

// Traversing React tree to load all modules
getLoadableState(app).then(() => {
  const html = renderToString(<YourApp />)
})