It isn't providing another third-party service - just wrapping some JS around Google fonts d/l. If this is something you don't prefer, self-hosting font files w

It isn't providing another third-party service - just wrapping some JS around Google fonts d/l. If this is something you don't prefer, self-hosting font files with font-display property is the only way out. Also, this isn't as performant as correctly self-hosting font files (because of separate DNS lookup to google font domain involved).