AsyncLoader.js

const loadable = (loaderFunction) => 
    class AsyncComponent extends React.Component {
        state = { ResultComponent: null, error: false, };

        componentWillMount() {
            loaderFunction
              .then(result => this.setState({ ResultComponent: result.default || result})) // "es6" default export
              .catch(() => this.setState({ error: true }); 
        }

        render() {
            const { error, ResultComponent } = this.state;    
            // Display loaded component
            return ResultComponent
                 ? <ResultComponent {...this.props}/>
                 : (error ? <ErrorComponent /> : <LoadingComponent />)
        }
    }