Stop the Infinite Spinner: Implement Polling Deadlines in React

Infinite loading spinners are a critical UX failure when async jobs silently fail on the server, leaving users stuck staring at a spinning indicator. This polling timeout pattern adds a client-side deadline that automatically detects stalled requests and prompts users to retry—a simple but essential safeguard for production applications. By implementing polling timeouts, developers significantly improve application reliability and user experience without complex server-side changes.