index.js

const params = U.view(['search', searchParamsL], location)
const search = U.atom(params.get().search || '')
const debouncedSearch = U.debounce(300, search)
debouncedSearch
  .onValue(q => params.modify(
    q ? R.assoc('search', q) : R.dissoc('search')
  ))

const items = U.thru(
  debouncedSearch,
  U.flatMapLatest(s =>
    fetchJSON(`http://localhost:3000/items`)
  ),
  U.startWith([])
)

const state = U.molecule({
  search,
  items
})

ReactDOM.render(
  <App
    search={U.view('search', state)}
    items={U.view('items', state)}
  />,
  document.getElementById('root')
)