AsyncComponent.js

import React from 'react';
import LoadingOverlay from './Loader'

export default (loader, props) => (
  class AsyncComponent extends React.Component {
    constructor(props) {
      super(props);
      this.Component = null;
      this.state = { Component: AsyncComponent.Component };
    }

    componentWillMount() {
      if (!this.state.Component) {
        loader().then((Component) => {
          AsyncComponent.Component = Component;

          this.setState({ Component });
        });
      }
    }

    render() {
      if (this.state.Component) {
        return (
          <this.state.Component { ...this.props } { ...props } />
        )
      } else {
        return <LoadingOverlay />;
      }
    }
  }
);