app.js

var domready = require('domready')
  , CustomerList = require('./customers/index')
  , CustomerView = require('./customers/view')
  , routing = require('./navigation')
  , container = null
  , currentPage = null

function run(){
  container = document.getElementById('container')

  routing.route(/^customer\/(.+)/, function(path) {
    switchTo(CustomerView, { name: path.split('/')[1] })
  })

  routing.route(/^$/, function() {
    switchTo(CustomerList)
  })

  routing.start({
    pushState: true
  })
}

function switchTo(Presenter, options) {
  if(currentPage) currentPage.detach()
  currentPage = new Presenter(container, options)
}

domready(run)