Testing Node.js v4.0.0 modular ES6 syntax

app.js

//------------
//   app.js
//------------
"use strict";

//import fs from 'fs';  // <-- Throws:   SyntaxError: Unexpected reserved word ^^^^import
//import Project from './lib/Project'; // <-- Throws:   SyntaxError: Unexpected reserved word ^^^^import
var Project = require('./lib/Project') //<-- works fine

var project = new Project("Journal");
console.log(project.start()); // --> logs "Project Journal starting"

Project.js

//-----------------------
//   ./lib/Project.js
//------------------------
"use strict";
class Project {
    constructor(name) {
        this.name = name;
    }

    start() {
        return "Project " + this.name + " starting";
    }
}
//export default Project;  // <-- Does not work, throws:  SyntaxError: Unexpected reserved word ^^^^export
module.exports = Project;  // <-- Works fine