How to specify the HTML of a dropped element?

[electrotype]

I'm new to Dragula. I'm trying to use this library instead of a more complex one.

One of my need is to be able to specify the HTML of an element that is "copied": I have a list of elements (each element of the list is a complex li) and below this list is a "+ element" button. I want to be able to drag the "+" button and, when dropped in the list, a new li element to be created.

How do I specify the HTML to use for the dropped element? Do I have to use the drop event and replace the dropped element (which is a simple button in my case!) by the required li HTML?