   # show config window
   toggle:->
     if not @configWnd
-      alert 'Editor-background is only available after you open some files.'
+      atom.notifications.add 'warning','Editor-background is only available after you open some files.'
     else
       if not @configWnd.visible
         @configWnd.show()

    cb(base64)
  reader.readAsDataURL(blob)




planeInitialCss =
  "position:absolute;



  activate: (state) ->
    if ! shadowDomEnabled
      if ! shadowDomAlert
        atom.notifications.add 'warning','Use Shadow DOM option must be
        enabled to run editor-background'
      return

    atom.commands.add 'atom-workspace',
      'editor-background:toggle': => @toggle()
    atom.config.observe 'editor-background',
