ES 2015 express-router

router.js

import {Router} 'express'

export default const router = Router()

router.get('/items',
  (req, res, next) => {
    Item
    .find()
    .exec()
    .catch(next)
    .then(users => {
      res.locals.users = users
      next()
    })
  },
  (req, res, next) => res.render('list')
)

router.get('/items/:id',
    (req, res, next) => Item.findById(req.params.id).exec().catch(next)
                        .then(user => res.locals.user = user && next()),
    (req, res, next) => res.render('show')
)