[wolframhempel]

That's fair, but I assume that is the initial implementation. Surely, over time, browser vendors will want to make the full spectrum of select functionality available consistently.

[caesil]

I don't think browsers will ever let web code affect things outside the viewport because scammers would cook up some truly zany things with that power.

[immibis]

Even rendering arbitrary pixels inside the viewport is bad enough. Something that went out of fashion but is apparently now back in fashion is detecting the user's operating system and browser, then displaying a pixel-perfect replica of a second browser window open to Paypal and asking you to log in... displayed within the bounds of the first browser window.

[dbbk]

Definitely not. Why would they let web devs render outside of the browser window? That's a recipe for disaster.

[cush]

There needs to be some middle ground. I'd trade off just being able to set just the background color and font and keep these native-like features