Will Mapbox add support for JupyterLab?
Take a look at ipyleaflet in how they create the nbextensions
https://github.com/jupyter-widgets/ipyleaflet#installation
It seems that Mapbox created this quick prototype but its not keeping up with Jupyter development. A fully interactive Mapbox JupyterLab widget would be amazing for DataScience.
This means moving away from your IFrame to a 1st class citizen widget in Jupyter with all of the on_hover, on_click, etc interactive events.