* Routing
Routing with reitit is all about data, you store your routes as nested vectors of hash maps.
the hash map should take a name and view param at least but you can add in params and validate the data.

Reitit works as a backend and frontend routing library so you can share routes between the two.

These are a few simple routes, the last takes parameters and does validation checking against the values.
#+BEGIN_SRC clojurescript
(def routes
  [["/"
    {:name ::frontpage
     :view 'home-page-function}]

   ["/about"
    {:name ::about
     :view 'about-page-function}]

   ["/item/:id"
    {:name ::item
     :view 'item-page-function
     :parameters {:path {:id int?}
                  :query {:foo keyword?}}}]])
#+END_SRC

You need to connect your routes data structure to =ref/start!= this function take's your own function where you can handle what should happen on route change, in this example an atom is updated causing react to render the new page.

#+BEGIN_SRC clojurescript
(def site-state (reagent/atom nil))

  (rfe/start!
   (rf/router routes {:data {:coercion rss/coercion}})
   (fn [m] (swap! site-state assoc :current-route m))
   ;; set to false to enable HistoryAPI
   {:use-fragment true})
#+END_SRC


To create a link to a route, you can use the =rfe/href= function which takes a lookup key which you specified in your routes, in this instance the key is name spaced to the current namespace.
#+BEGIN_SRC clojurescript
[:a {:href (rfe/href ::frontpage)} "example link"]
#+END_SRC