Hi Vincent. I see what you did: target a class that only exists as a subclass by making it exists as a main class temporarily with a new div, make the interaction target that, then remove that div. The interaction will then work on the subclasses with that name. This is good to know, but not what I needed.
http://bart-s-fantabulous-site.webflow.io/target-sub-class
In the above example, I want a way to target only the grey box that is clicked so only the dropdown beneath opens. If I have a class of “open”, all items with the class open will be affected. I want to avoid making an interaction for each instance of the grey item. Not sure if it’s possible 
Actually, I think I’ve hijacked this thread. I’ve created a specific topic over here: Sidenav created with dropdowns, can it stay open when a page is selected?