How to make onchange script execute on list collector only when item is selected and not removed?

[shanmathi1809]

Hello all!

I have a variable on RITM which is a list collector.

I have a requirement that On change of list collector variable(available to selected) a popup should appear and based on the selection(yes/ no) the list collector should be modified
if yes is selected-no change
if no is selected- pop the latest added option

this all should not work if any option is moved from selected to available. 

Thank you in advance

[Ankur Bawiskar]

@shanmathi1809

please share your script and what debugging did you perform?