#Feature: Add possibility to define container the markup is added to

In order to allow different styling (e.g. not overlaying to whole page but only a part of it) it would be good to have the possibility to pass the container the markup should be attached to.

(PR will follow)

Start by locating the lightbox entry point that attaches generated markup to the document, then inspect how callers configure and open it. Done means callers can select a container so the markup is attached there rather than across the whole page, while existing behavior remains available.

Written by the indexing model from the issue text.