progress = function (
   event
Object that contains information about event. Object has the following properties:
 
 
target (object): An object that raised the event.
 
type (string): Event name.
 
data (object): An object that contains data, which were specified when subscribing to the event.
 
originalEvent (object): Original event if event was received from DOM-element.
 
 : object
   eventsArgs
Object that contains event arguments. Object has the following properties:
 
 
description (string): The image/document file converting status. Possible values: "Encoding", "Finished" or "Aborted".
 
errorMessage (string): Error message.
 
progress (number): The progress, in percents, of synchronous file converting.
 
currentImageIndex (number): A zero-based index, which defines image that is being converting now.
 
convertedImageCount (number): The total number of converted images/pages.
 
resultFilesIds (object): An array of identifiers of converted files.
 
 : object
) { };