Wildcard CNAME pointing to your reverse proxy who then figures out where to route the request to? That’s what I’ve been doing - this way there’s no need to ever update DNS at all :)

I find the path a bit clunky because the apps themselves will oftentimes get confused (especially front-ends). So keeping everything “bare” wrt path, and just on “separate” subdomains is usually my preferred approach.

Or use yEnc: https://en.m.wikipedia.org/wiki/YEnc

JS “idiomatic” way to cast to boolean. But could just be written as !window.chrome instead.