I was trying to refer to the simulated iframe that's the live preview...and probably uses the service worker's responses to emulate the behaviour rather than sa

I was trying to refer to the simulated iframe that's the live preview...and probably uses the service worker's responses to emulate the behaviour rather than say, a real end-to-end http server pipeline. This sounds very likely like http module injection, so that the nodejs module isn't really doing what it thinks it does, but is using an injected API behind the scenes. Raw TCP is only available for Chrome Extensions, on Chrome OS, iirc. (Setting aside the lack of TLS or a real crypto module that isn't using the Browser's Web Crypto API approach)