best way to handle subdomains and assets

[russellsamora]

I've encountered this specifically with adapter static, but I believe this is part of core kit.

When I try build on a subdomain (e.g., github pages), just modifying paths { base: "subdomain" } works in an img tag src whether dev or deployed. But if you set the asset via the style tag, like using background: url("thing.png") it works in dev but not deployed.

I'd expect it to work the same in both places, but maybe that is the wrong framing. My current hack is to just use import { base } from "$app/paths"; and pass that through as a css var like <div style="--base: {base}">. I haven't tried modifying path.assets in config but according to the doc that requires an absolute url, which would make it less portable.

Any thoughts?