README.md

Instead of running $ node index.js to start the application, use $ node bootstrap.js. This will transform ES2015 module syntax into CommonJS module syntax on the fly.

See https://www.npmjs.com/package/es6-module-loader#nodejs-use

bootstrap.js

var System = require('es6-module-loader').System;

// System.transpiler = 'babel';
// System.transpiler = 'typescript';

System.import('./index').then(function (index) {
	index.run(__dirname);
}).catch(function (error) {
	console.log('error', error);
});

cat.js

export default class Cat {
}

index.js

import Cat from './cat';

// use Cat...

This is supposed to work, but System had trouble loading 'babel'.