Init of main component of cljs + react

gistfile1.clj

;;; definition of Layout component - the root component for the application
(defr Layout
  [component prop _]
  [:div.nav-slide-wrap {:on-click handle-body-clicks}
   ;; a sub component - it's passed the entire `prop` even though it 
   ;; doesn't need all of it. Eventually it'll be smart for me to only pass the necessary data to components.
   [Nav prop]
   [:div {:class-name (str "main-body " (if (:user prop) "signedIn" "notSignedIn"))}
    [Header prop]
    [Content prop]
    [Footer]]])

;; create an endless loop that reads from the app-state atom whenever there's new state, and sets 
;; the `props` of the layout to the new state. 
(go (let [ch (chan)
          [_ _ _ _ new-state] (<! (state/sub ch))
          layout (react/render-component (Layout new-state) content-el)]
      (loop []
        (let [[_ _ _ _ new] (<! ch)]
            (.replaceProps layout new)
            (recur)))))