method called when item moved on possible drop landing during dnd
source | HTMLElement | DOM element on which dnd action started |
target | HTMLElement | DOM element of possible drop landing |
ev | Event | native html event |
HTMLElement | DOM element which will be saved as drop target ( to ignore drop landing - return null value ) |
The method isn't purposed for direct call! It is an extension point.
You can override it with your own logic, but be sure to check dnd related events first, as they are provide much more convinient way for dnd handling.
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