Cannot add children to a Custom Element after creation

[matt-gadd]

Enhancement
If you create a custom element then add children post creation, they are not consumed into the parent. We can achieve this using a MutationObserver to watch for child nodes.

[kitsonk]

That would give us the changes, but another consideration is what to do with the DOM after that. Re-using DOM after the projector is created would be tricky I suspect, so it would be easier to detach those children from the DOM, generate the virtual DOM nodes necessary and then invalidate.

[matt-gadd]

@kitsonk we already do those things via the DomWrapper. basically we just need to take the children nodes, wrap them and set them as children (we already do this at the initialisation phase)

[kitsonk]

This is flagged as expedited but hasn't been actioned. Is this still required, and if so, when?

[kitsonk]

Need to do something with this or close it.