Good tip, I didn't realize the browser would automatically resolve any subdomain of localhost to 127.0.0.1/::1 as well these days.

I tested on Chrome but I assume this is true for Safari as well?

Just tried it on my Mac and sadly it doesn’t seem like it. I’m still on Sequoia, so possibly it does it on Tahoe, but probably unlikely. That’s a shame.

It’d be nice if someone on the Safari team added this though to match Chrome and Firefox!