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`/docs/concepts/caching/stale-while-revalidate` does not exist. Similar pages:

- [Invalidate by tag (Vercel SDK)](/docs/rest-api/sdk/edge-cache/invalidate-by-tag.md): POST /v1/edgecache/invalidatebytags Marks a cache tag as stale, causing cache entries associated with that tag to be revalidated in the background on
- [Invalidate by tag](/docs/rest-api/edge-cache/invalidate-by-tag.md): POST /v1/edgecache/invalidatebytags Marks a cache tag as stale, causing cache entries associated with that tag to be revalidated in the background on
- [STALE](#stale)[](/docs/headers/response-headers.md): The response was served from the cache but the content is no longer fresh, so a background request to the origin server was made to update the
- [proxyrevalidate and staleiferror](#proxyrevalidateandstaleiferror)[](/docs/caching/cdn-cache.md): Vercel doesn't currently support using proxyrevalidate and staleiferror for serverside caching.
- [At revalidation time](#atrevalidationtime)[](/docs/incremental-static-regeneration.md): Loading.. Two triggers can update cached content Timebased revalidation runs automatically after a set interval Ondemand revalidation runs when you

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