Fixed an exception when xhr is null

Close #39
estum · Sep 23, 2016 · 07450b1 · 07450b1
1 parent 4de82b7
commit 07450b1
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/app/assets/javascripts/growlyflash/listener.coffee b/app/assets/javascripts/growlyflash/listener.coffee
@@ -33,14 +33,15 @@ class Listener
     @stack ?= new Stack()
     @process_static() if window.flashes?
     ($ context).on Growlyflash.Listener.EVENTS, (event, xhr) =>
-      xhr ?= event.data?.xhr
-      source = process_from_header(xhr.getResponseHeader(Growlyflash.Listener.HEADER))
-      @stack.push_only_fresh source
+      if xhr ?= event.data?.xhr
+        source = process_from_header(xhr.getResponseHeader(Growlyflash.Listener.HEADER))
+        @stack.push_only_fresh source
+      return
 
   process_static: ->
     @stack.push alert for alert in process(window.flashes)
     delete window.flashes
 
 @Growlyflash.Listener = Listener
 @Growlyflash.listen_on = (context) ->
-  @listener ?= new @Listener(context)
+  @listener ?= new @Listener(context)