Why Your UI Won’t Update: Debugging Stale Data and Caching in React Apps
SMRTR summary
Modern web apps have multiple caching layers that can serve stale data, causing UI update issues. This comprehensive guide identifies five common caching sources - React Query cache, Next.js fetch caching, browser HTTP cache, CDN/hosting cache, and service worker cache - plus local state duplication. It provides debugging strategies and prevention techniques to help developers quickly identify which layer is serving cached data instead of fresh updates.
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