Caching

Summary

Deciding, at an architectural level, what data gets cached, for how long, and how it's invalidated — a recurring decision across API layers, routing and rendering.

How to Learn This

1Map out every place your app currently caches data (browser, React Query, CDN, service worker).
2Remember the classic line: 'there are only two hard things in computer science: cache invalidation and naming things.'
3Design a caching strategy for one real feature, including when it goes stale.

API Layer

Error Boundaries

More topics in Frontend System Design

Folder Structure Scalable Architecture Atomic Design Feature-based Architecture Component Library Reusable Components State Separation API Layer Error Boundaries Micro Frontends Accessibility Performance Architecture

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