Fragment Subscriptions - Directive Approach

directive_approach.graphql

fragment userFragment on User
@subscribeTo(name: "avatarChange", with: avatarChangeFragment)
{
  name
  username
  avatarUrl(size: 200)
  avatarChangeId # can be an implicit field on this fragment added by
                 # the server to track subscription events on the client
}

fragment avatarChangeFragment on UserAvatarChangePayload {
  user {
    avatarUrl(size: 200)
  }
}