Pub/Sub

GraphQL subscriptions:

Use useSubscription for real-time data updates:

Combine initial query with subscription for updates:

Update Apollo cache when subscription receives data:

Subscribe only when needed:

Show the user that live updates stopped, and don't report the error yourself. The shell's Apollo client reports a socket that closed for good once per subscription, and the backend has already reported an error it sent (Who reports an error).

Handle connection drops gracefully:

For more detailed technical guidance, see these reference files: