Is module.register scoped to the called file or the rest of the process?

[devjiwonchoi]

Example

While running a process, there's a case where I need to register a hook to resolve TypeScript.
This process is held at ./foo.js, and is conditional. This ./foo.js file will be called multiple times.

// foo.js

if (shouldRegisterHook) {
  const { register } = require('module')
  register('./loader.mjs')
}

// Expect this TypeScript file to be imported correctly.
const typescriptFile = await import('path/to/typescript/file.ts')
// ...

Question

1. When ./foo.js file is called multiple times, can the hook be registered multiple times?
2. What scope does the hook affect in this case?
   a. Throughout the process.
   b. This file ./foo.js scope.

[aduh95]

Calling register() affects the whole thread. A hook can be registered several times but I don't really see a use-case for that.

[devjiwonchoi]

Yes, it's the opposite, I'm worried about perf as it's unnecessary.
As you mentioned, as deregister() PR is in stale, is there a reason why? Is it alright for me to pick up?