index.js

var choo = require('choo')
var html = require('choo/html')

var app = choo()

app.router(function (route) {
  return [
    route('/', home)
    route('/:page', page)
  ]
})

app.start()

function home (state, prev, send) {
  return html`<h1>home</h1>`
}

function page (state, prev, send) {
  var pagename = state.params.page
  // can also access state.location.pathname which mirrors window.location.pathname
  return html`<h1>${pagename}</h1>`
}