React Loadable Visibilty Package - https://github.com/stratiformltd/react-loadable-visibility/blob/master/src/react-loadable.js

react-loadable.js

import React, { Component } from 'react'
import Loadable from 'react-loadable'
import createLoadableVisibilityComponent from './createLoadableVisibilityComponent'
import { IntersectionObserver } from './capacities'

function LoadableVisibility (opts) {
  if (IntersectionObserver) {
    return createLoadableVisibilityComponent([opts], {
      Loadable,
      preloadFunc: 'preload',
      LoadingComponent: opts.loading,
    })
  } else {
    return Loadable(opts)
  }
}