Router concept

router-concept.md

// trnsitionRequests -> BrowserAPI -> [ resolveRoute -> loadData -> render -> restoreScroll ]

// poor man's strem.flatMapLatest()
router.pipe((payload, next) => {
  next(1)
  next(2)
  return () => {
    // cleanup
  }
})

createRouter(callback => {
  browserHistoryAPI.listen(callback)
})
.pipe(createNestedReactResolver(...))
.pipe(createReactDataLoader(...))
.pipe(createNestedReactRenderer(...))
.pipe(createScrollRestorer(...))

Event = {type: ... | 'END', payload: any}
Middleware = Event -> Event | Stream<Event> | Array<Event>

{type: 'END'} is special Event, we automatically dispose subscription after it. Other types like 'NORMAL', 'ERROR', 'REDIRECT', etc. are up to user (or maybe not, we might need a convention for example if we provide middlewares out of the box, but only END is special anyway)