expireTime

You can specify a customstale-while-revalidate expire time for CDNs to consume in theCache-Control header for ISR enabled pages.

Opennext.config.js and add theexpireTime config:

module.exports= {// one hour in seconds  expireTime:3600,}

Now when sending theCache-Control header the expire time will be calculated depending on the specific revalidate period.

For example, if you have a revalidate of 15 minutes on a path and the expire time is one hour the generatedCache-Control header will bes-maxage=900, stale-while-revalidate=2700 so that it can stay stale for 15 minutes less than the configured expire time.