index.js

var assert = require('assert')
var wayfarer = require('wayfarer')

// electron support
var isLocalFile = (/file:\/\//.test(
  typeof window === 'object' &&
  window.location &&
  window.location.origin
))

/* eslint-disable no-useless-escape */
var electron = '^(file:\/\/|\/)(.*\.html?\/?)?'
var protocol = '^(http(s)?(:\/\/))?(www\.)?'
var domain = '[a-zA-Z0-9-_\.]+(:[0-9]{1,5})?(\/{1})?'
var qs = '[\?].*$'
/* eslint-enable no-useless-escape */

var stripElectron = new RegExp(electron)
var prefix = new RegExp(protocol + domain)
var normalize = new RegExp('#')
var suffix = new RegExp(qs)

module.exports = Nanorouter

function Nanorouter (opts) {
  if (!(this instanceof Nanorouter)) return new Nanorouter(opts)
  opts = opts || {}
  this.router = wayfarer(opts.default || '/404')
}

Nanorouter.prototype.on = function (routename, listener) {
  assert.equal(typeof routename, 'string')
  routename = routename.replace(/^[#/]/, '')
  this.router.on(routename, listener)
}

Nanorouter.prototype.emit = function (routename) {
  assert.equal(typeof routename, 'string')
  routename = pathname(routename, isLocalFile)
  return this.router.emit(routename)
}

Nanorouter.prototype.match = function (routename) {
  assert.equal(typeof routename, 'string')
  routename = pathname(routename, isLocalFile)
  return this.router.match(routename)
}

// replace everything in a route but the pathname and hash
function pathname (routename, isElectron) {
  if (isElectron) routename = routename.replace(stripElectron, '')
  else routename = routename.replace(prefix, '')
  return decodeURI(routename.replace(suffix, '').replace(normalize, '/'))
}