Add and Remove items mutually between two categorized multi selection pull downs

Looking to have below kind of LHS & RHS drop down list.

I have two multi selectable pull down list LHS and RHS. Left side pull down is a super set and right one is a subset. The list is categorized too. User should be able to select whole category and add to right pull down list and similarly one should be able to remove whole category from RHS dropdown list too.

If user is selecting only Item2 in Category3 and if Category3 is not present in RHS , the Item2 should be added to RHS along with its Category.

How can we implement this using javascript or any Jquery libraries ?

I tried to implement this using multi selection pull down list. But how to do the same with category too. I was not able to find a good one .

Via Active questions tagged javascript - Stack Overflow https://ift.tt/QuL3tNT

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