How to create Expandable height Items in List?

I am trying to implement a List of direction Column in which items height can be modified on focus/unfocus.
I found - Column Layout - Expandable Height Items which is nearly related to the concept I’m trying to implement.
I am not able to find the code of this implementation. Where should I modify the height and how to trigger it ?

Hi Sirisha_p! Are you using the Lightning-UI components? If so this should help you on how to use the component in question:

There is no need to implement something that’s already out there in the components :slight_smile: