I swear I remember reading somewhere that the container element for vtkRemoteView required absolute (px) values for the width and height (e.g. the DOM element passed to the RemoteView.setContainer method)…but now I can’t find any mention of that requirement. I’m just curious if that is still required (or was ever required? 
That was never a requirement, just position: relative as its inside is using absolute positioning to use what ever space was available while not forcing any size to its container.
Great, thanks so much for the confirmation (Now if I could only figure out why I swear I remember reading this somewhere 
…but makes it much easier that it isn’t a requirement )
But the position: relative is a requirement. 