We had exactly this with the <portal> element https://news.ycombinator.com/item?id=19866584 https://news.ycombinator.com/item?id=19866584 It gets shipped in Ch

We had exactly this with the <portal> element https://news.ycombinator.com/item?id=19866584 https://news.ycombinator.com/item?id=19866584 It gets shipped in Chrome (often without a W3C spec or substantial discussion with other stakeholders), and then other browser vendors are forced to play catch up.