base.js.coffee in rails_script-0.3.0

- old
+ new

@@ -1,15 +1,37 @@
 window.App ||= {}
 class App.Base
 
   constructor: ->
+    if (window.jQuery) then @setClearEventHandlers() # clearing application event handlers only possible with jQuery
     return this
 
 
+  ###
+  Run the new action for the create action.  Generally the create action will 'render :new' if there was a problem.
+  This prevents doubling the code for each action.
+  ###
   create: ->
     if typeof $this.new == 'function'
       return $this.new()
 
 
+  ###
+  Run the edit action for the update action.  Generally the update action will 'render :edit' if there was a problem.
+  This prevents doubling the code for each action.
+  ###
   update: ->
     if typeof $this.edit == 'function'
-      return $this.edit()
+      return $this.edit()
+
+
+  ###
+  Clear event handlers with a blank namespace.  This will prevent window and document event handlers from stacking
+  when each new page is fetched.  Adding a namespace to your events will prevent them from being removed between page
+  loads, i.e. "$(window).on 'scroll.app', myHandler"
+  ###
+  clearEventHandlers: ->
+    jQuery(document).on 'page:before-change', ->
+      for element in [window, document]
+        for event, handlers in jQuery._data(element, 'events')
+          for handler in handlers
+            if handler.namespace == '' then $(element).off event, handler.handler
\ No newline at end of file