Dynamic imports are very interesting..

index.js

import React, { Component } from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import registerServiceWorker from './registerServiceWorker';

class Dynamic extends Component {
  constructor(props) {
    super(props);
    this.state = { module: null };
  }
  componentDidMount() {
    const { path } = this.props;
    import(`${path}`)
      .then(module => this.setState({ module: module.default }))
  }
  render() {
    const { module: Component } = this.state; // Assigning to new variable names @see: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment
    return(
      <div>
        {Component && <Component />}
      </div>
    )
  }
}

ReactDOM.render(<Dynamic path='./App' />, document.getElementById('root'));
registerServiceWorker();