This is a comprehensive post from The Coding Couple:
"If you are seeking an easy way to get started on a new Phaser game the ES2015 way, then this guide is for you. In this guide we will first use jspm to quickly set up a new project with a module loader and an ES2015 transpiler. We will then pull the latest Phaser package from the jspm registry and set up a basic game that highlights a few ways we can take advantage of ES2015 to make our code more modular. Finally, we will bundle the application so that it can be deployed as a static file."