Yeah, this is a great idea. This is also related to Dash DataTable - Conditional Formatting and https://github.com/plotly/dash/issues/36#issuecomment-329702841.
I’d like to modify dash-renderer to allow any attribute in a component take a component as a value, similar to how children works right now (html.Div(children=html.H1(children='Header'))).
This will enable some powerful stuff but it will be a lot of work to do right. If anyone / any company has the resources to sponsor this work, please reach out to our team.