Portals were (are?) an attempt to do this. Haven't heard much about them in a while: https://github.com/WICG/portals#summary-of-differences-between-portals-and-

Portals were (are?) an attempt to do this. Haven't heard much about them in a while: https://github.com/WICG/portals#summary-of-differences-between-portals-and-iframes https://github.com/WICG/portals#summary-of-differences-betwe...