make the base of URL constructor configurable?

[hesxenon]

I have a rather niche use case (and will probably deploy a fork for now) where I'm trying to use HTMX out of an iframe with [href=about:srcdoc]. So when HTMX tries to construct any URL at all it's expanded to new URL("the path", "about:srcdoc") which obviously isn't a valid url.

Would it be possible to add a config option to specify the base parameter?

Like

urlBase?: undefined | string | "root"

where "root" would have the special meaning of using the root windows url.