conditional requirement with top-level await

[jimmywarting]

conditional requirement with top-level await

[guybedford]

The reason we don't assume top-level await for these kinds of cases is because it would mean making the module async which is not a backwards compatible change in every case.

Since you are the library author here, my suggestion would be to modify your library approach to use the "imports" pattern:

{
  "imports": {
    "#worker_threads": {
      "node": "node:worker_threads",
      "default": "./worker-threads-shell.js"
    }
  }
}

where worker-threads-shell contains export const MessageChannel = null.

Then in the application to do import { MessageChannel } from '#worker_threads' and then gate on if (MessageChannel) instead.

Do let me know if the above works for you.

[jimmywarting]

I have already switched to using atob solution