jQuery drag event doesn t seem to have deltaX property

Question

I am trying to create my own slider plugin with jQuery and this library for the drag event. However, on callback for the event, the deltaX-property doesn't seem to occur, which is really weird since it exists in the documentation. I am using version 2.2 of the library. I am using the library like this:

$('#myelement').bind('drag',function(e){
    console.log(e);
});

Does anyone have any experience with the drag event and can help me? I have also tried using the 'drag' method of the library with the very same result. The deltaX property doesn't exists in the callback.