In this project i used Node.js 4.3.1 so in package.json i installed “babel-preset-es2015-node4” and in babel configurations under presets keys i setted “es2015-node4”. If you have different version or configuration please refer to Babel docume ntation here: https://babeljs.io/
For more explanation about this project please look at this article: https://medium.com/@nicknaso/c664d64532ba