How to get nanocomponent instance reference from root node?

Hi :wave:

I have a situation where I have many components and some external libraries which manipulates the DOM. So, those libraries transform the root node of my components, and I need to run functions from the components after they are manipulated but I can't figure out how to get reference to that instance from the node manipulated for this library.

In other words, what I would like is the inverse of the `element` property of nanocomponent, perhaps a function that given a DOM element returns the actual nanocomponent tied to it. Is this possible?

Thanks :)

Start by reading nanocomponent's `element` property and the component lifecycle around the root DOM node. Trace how a component instance is associated with that node, then determine whether a reverse lookup can be supported; done means the supported behavior or limitation is clear and covered by the relevant documentation or tests.

Written by the indexing model from the issue text.