Stale-if-error cache-control directive now supported for all responses

Vercel CDN now supports the stale-if-error Cache-Control directive for more resilient caching during origin failures.

• •The stale-if-error directive specifies how long (in seconds) a stale cached response can be served when an origin request fails
• •When the origin returns an error, the CDN may serve a previously cached response instead of returning the error to the client
• •Covered error types include 500 Internal Server Errors, network failures, and DNS errors
• •This allows applications to remain available and respond gracefully during temporary upstream service outages

This summary was automatically generated by AI based on the original article and may not be fully accurate.