text: import React, { Component } from 'react';
  
  const asyncComponent = (importComponent) => {
      return class extends Component {
          state = {
              component: null
          }
  
          componentDidMount () {
              importComponent()
                  .then(cmp => {
                      this.setState({component: cmp.default});
                  });
          }
  
          render () {
              const C = this.state.component;
              return C ? <C {...this.props} /> : null;
          }
      }
  }
  
  export default asyncComponent;