I am using apollo client with the additional module subscriptions-transport-ws and graphql on the server.
When a graphql error happens on the server, kind of cannot return null for non-nullable... the Browser tells me that there is a apollo has a "Unhandled GraphQL subscription errror".
How does the error handling for subscriptions on the client side work?
If you are asking how to get the error to report then just add ,onError: err => console.error(err) below the updateQuery in your subscription and it reports errors. If you are asking how it all works then that's beyond me, sorry.