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Browser Caching Basics

Use HTTP caching well

Effective browser caching sets cache-control and ETag headers, uses immutable versioned assets, and separates static from dynamic content to reduce latency and bandwidth.

Headers

Use cache-control/max-age, ETag/Last-Modified; set immutable for hashed assets.

Versioning

Hash filenames and avoid changing URLs without new versions.

Scope

Cache static assets long; keep dynamic responses short or no-store.

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