how to work drag and drop

Question

pl help me i had not understand of drag and drop concept in how to work function of drop

Answer 1

if you want to know about drang and drop check this link
https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API
or
https://www.w3schools.com/html/html5_draganddrop.asp
or
https://www.html5rocks.com/en/tutorials/dnd/basics/