Deno's is probably written in rust via the tokio rust crate. This version of fetch in NodeJS is written in JavaScript. It would probably get upgraded to C++ in due time once it's mature enough.
You're better of using some service in China that does log ip's if you're not living in China(not being part of the five eyes anglo sphere is the goal) and vice versa if you are living in China. Security via sovereign obscurity.
Embed a pressure sensor that detects when a pigeon parches on it, then activate the electrocution mechanism of foreign biological organisms, also known as EMFBO.
Sounds like a win for Russia, new fertile area for farm land, more co2 presumably accelerates this thus providing new warm water ports across the arctic.
It's not functional programming, it's functional languages that go bat shit crazy with the amount of symbols they use that'd make looking at heliographs a refreshing pass time.
Then this is not related to async/await but regardless even then JavaScript has always had the ability to change the writability of properties such that trying to change a property in an object will yield a no-op with Object.defineProperty, and now with newer features like Object.freeze and private properties.