   pushStateSupport: history && history.pushState
   hashchangeSupport: "onhashchange" of window
   hashBaseUrl: false
+  hashPreviousView: false
   disableUrlUpdate: false
   fallbackRoute: false
   initPushState: () =>
-    # check if current url needs to be changed pushState <-> hashbang
     @attachClickListener()
     @attachLocationChangeListener()
     @renderInitialView()

    else
      if @hashchangeSupport
        window.onhashchange = (event) =>
          href = window.location.hash.substring(2)
          @log("Rendering onhashchange", href)
          @renderUrl(href)

  renderInitialView: =>
    @log("Rendering initial page")

            event.preventDefault();
            @updateUrl(href)
        else
          if @exec(href)
            @log("Updating hash with", href)
            event.preventDefault();
            @hashPreviousView = href
            @updateUrl(href)

  attachLocationChangeListener: =>
