Unless you need to support ancient browsers [1], I'd go the easy way and leave the URL parsing to the browser, e.g. `['http:', 'https:', 'mailto:', 'tel:'].includes(new URL(value, location.origin).protocol)`
> The new systemd-resolved package will not be installed automatically on upgrades as it has been split into a separate package. If using the systemd-resolved system service, please install the new package manually after the upgrade, and note that until it has been installed, DNS resolution may no longer work as the service will not be present on the system.
will installing over the internet work without DNS resolution?
Isn't that what document.baseURI is for? At least that's my understanding:
new URL("/whatever", document.baseURI)