Nikhil I wrote a function for counting child elements inside a div and displays the count value in html. I think there is a property in js to find number of child nodes for a particular node. Everytime we drag a card from one div and drop in another div , while the drop event occurs that function get's triggered. This is how i've done that. I forgot to add those files in github nikhil 馃う. I lost those files 馃槓.