server.js

'use strict'

var express = require('express');
var path = require('path');
var babelify = require('express-babelify-middleware');
var serveIndex = require('serve-index');

var app = express();

app.set('port', 9877);

//
// Application
//

const external = [
  'three/three.js',
  '@cycle/core', 
  'rx',
  'd3',
  'debug',
  'underscore'
];
app.use('/bundle.js', babelify(external));

var appPath = path.resolve(__dirname, 'app', 'index.js');

app.use('/app.js', babelify(appPath, { external: external }));

app.use(express.static(appPath));

//
// Development
//

var devPath = path.resolve(__dirname, 'development');

app.use('/development', serveIndex(devPath));
app.use('/development', express.static(devPath));

//
// Static Files
//

var staticPath = path.resolve(__dirname, 'static');

app.use('/', express.static(staticPath));

module.exports = app;