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AhaBulb: Stuff Everyone Should Know · ahabulb.com/tech-http-304-etag

Your browser asks if its cached file changed and gets 304 Not Modified. What happens?

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  1. The browser downloads the file again
  2. The page shows an error
  3. The browser reuses its cached copy

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References

  1. MDN: HTTP caching developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Caching Checked 2026-10-10.

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