#BackToBasics: The HTTP Cache
summary
Explains HTTP caching mechanics with live demos: Cache-Control: max-age showing 15-second caching, conditional revalidation using ETag/If-None-Match or Last-Modified producing 304 responses, and the differences between no-cache, no-store, must-revalidate and immutable with long max-age for fingerprinted assets. Describes browser cache types (memory, disk, module map, service worker), shared caches (CDN, reverse proxy), Vary header pitfalls, BFCache, the deprecation of HTTP/2 push, and practical cache-busting recipes.
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chapters (19)
- 0:00Introduction
- 1:24HTTP cache overview
- 4:14Key HTTP headers
- 6:46Demo with max-age
- 8:56Conditional requests ETag
- 10:40Last-Modified and revalidation
- 12:05No-cache vs No-store
- 14:51Immutable and optimization
- 17:40Shared caches and CDN
- 21:59Content negotiation and Vary
- 27:14Demo Vary and issues
- 31:11Browser cache and layers
- 32:57Map module and optimizations
- 34:03HTTP/2 Push and Early Hints
- 35:25AppCache and Service Workers
- 36:52Cache partitioning
- 38:56BF Cache and optimizations
- 41:07Best practices
- 42:54Summary
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