Hi,
I would like to work on making this feature. Based on the requirements you have mentioned, this is what i understood:
1. When a new element is added to the existing dom via createElement, you want to reload the DOM? I didn't quite understand what flow is needed here, but I think we can discuss more about it.
2. The 2nd part of "finish the row of edition to product": here we need to add a new row to the form based on some condition?
Let me know if you want to discuss further. I can look into it and help you out.
Thanks