jQuery event.data Property
Example
Return the data passed with the on() method for each <p> element:
    $("p").each(function(i){
   $(this).on("click", {x:i}, function(event){
       alert("The " + $(this).index() + ". paragraph has data: " + event.data.x);
   });
 });
Try it Yourself »
Definition and Usage
The event.data property contains the optional data passed to an event method when the current executing handler is bound.
Syntax
event.data
| Parameter | Description | 
|---|---|
| event | Required. The event parameter comes from the event binding function | 

