HTTP 304 — Not Modified
3xx Redirection
What it means
The cached copy the client already has is still current, so no body is sent.
What to do about it
Nothing to fix — this is caching working correctly. If you never see 304s, check that you are sending ETag or Last-Modified.
Where it sits
304 belongs to the 3xx family: Further action is needed to complete the request — usually following a redirect.
HTTP/1.1 304 Not ModifiedChecking it yourself
# see the status code and headers only
curl -sI https://example.com/path
# follow redirects and print each hop
curl -sIL -o /dev/null -w "%{http_code} %{url_effective}\n" https://example.com/path
# JavaScript
const r = await fetch(url);
console.log(r.status, r.statusText);