This is external addon for clinch - CommonJS to browser packer to support .js files with ES2015 specification.
import Clinch from 'clinch';
import { clinch_es6 } from 'clinch.es6';
//create packer object
let packer = new Clinch({
runtime : true
});
//add plugin
packer.addPlugin(clinch_es6);
For more information see main module documentation.