Fetch Cache and 404 status code

[plain halo]

Is someone able to confirm my understanding that when fetch()ing something that 404's, that the result is not cached? I couldn't see this written down in the docs.

My use cases is that we are using catch-all routes which hit a CMS, and we are getting a lot of cache misses for pages that don't exist. Fetches for pages that exist cache fine, but those that 404 do not.

[unique crescent]

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[fluid crescent]

i haven't personaly tested it (it should be simple tho), but i believe the error codes (ie 4xx) should not be cached as they are an "error"