convex-realtime

Real-time queries in React with Convex use the `useQuery` hook to automatically subscribe to data changes. Your UI updates instantly whenever the underlying database data changes, eliminating the need for manual refresh logic or polling.

Optimistic updates in a Convex React app show user actions immediately while the mutation is confirmed in the background. Using `useMutation` patterns with rollback-safe updates ensures the UI reverts cleanly if the server mutation fails.

Cursor-based pagination with Convex uses `usePaginatedQuery` to load large result sets efficiently. It enables incremental loading of data chunks with proper loading-state checks, ensuring the interface remains responsive while expanding longer lists.

Conditional data loading with Convex subscriptions supports skip handling to pause queries when not needed. This prevents unnecessary data fetching and subscription overhead when specific UI components are unmounted or conditions are unmet.

Managing loading states for reactive Convex data flows involves checking loading-state flags provided by `useQuery` and `usePaginatedQuery` hooks. This ensures your UI cleanly handles initial data fetching and incremental pagination updates without blocking.