# Page Not Found

`/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
- [Proxyrevalidate and staleiferror](/docs/caching/cdn-cache.md): Vercel doesn't currently support using proxyrevalidate and staleiferror for serverside caching.
- [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
- [Stalewhilerevalidate](/docs/caching/cache-control-headers.md): This cachecontrol directive allows you to serve content from the Vercel CDN cache while simultaneously updating the cache in the background with the
- [Fixstale data cache](/docs/caching/cdn-cache/debug-cache-issues.md): If you're using the data cache (via fetch with next.revalidate or similar caching APIs) and the cached data is stale, invalidate it by tagterminal

All pages: [/llms.txt](/llms.txt)