I'm the developer of react-reverse-portal, this will definitely be a real help!
Iframes particularly have always been a pain point, as people often want to reparent them to move things around the DOM, but they always reload completely when you do so which causes all sorts of issues. This new API says it explicitly _doesn't_ reload iframes, so we'll be able to drop that caveat immediately (for supporting browsers, but hopefully Safari/FF will follow suit soon). Looks great!
Iframes particularly have always been a pain point, as people often want to reparent them to move things around the DOM, but they always reload completely when you do so which causes all sorts of issues. This new API says it explicitly _doesn't_ reload iframes, so we'll be able to drop that caveat immediately (for supporting browsers, but hopefully Safari/FF will follow suit soon). Looks great!