Running apollo client example in nodejs environment gives "ReferenceError: CloseEvent is not defined" error

[sal-limones]

I'm trying to run both apollo server and client with graphql-ws subscriptions and can't figure out where to get the CloseEvent type for the nodejs environment.

[enisdenjo]

CloseEvent does not exist in the ws library, it is exclusively a browser global class. You can, however, check if a value is like a close event. Two properties can distinguish a close event, here's the check:

function isLikeCloseEvent(val) {
  return 'code' in Object(val) && 'reason' in Object(val);
}

[sal-limones]

Thanks a lot, this method worked. Maybe it's a good idea to add this to the examples section of the docs?