How can I debug App Router's fetch caching? Can I get the logs back?

Answered

South Polar Skua posted this in #help-forum

South Polar SkuaOP

2023-10-24T10:04:10.000Z

Hi

I would like to see if what requests have been cached or not during development.

Back in July (early 13.4 versions of Next.js) had logs that showed if a fetch request has hit the Next.js cache or not. Is there a way to show those logs again?
Or is there a better way to debug the caching behavior?

Thanks in advance!

Answered by joulev

try this in next.config.js

experimental: {
  logging: {
    level: 'verbose'
  }
}

View full answer

5 Replies

@South Polar Skua Hi I would like to see if what requests have been cached or not during development. Back in July (early 13.4 versions of Next.js) had logs that showed if a fetch request has hit the Next.js cache or not. Is there a way to show those logs again? Or is there a better way to debug the caching behavior? Thanks in advance!

joulev

2023-10-24T10:05:09.000Z

try this in next.config.js

experimental: {
  logging: {
    level: 'verbose'
  }
}

Answer

South Polar SkuaOP

2023-10-24T10:12:30.000Z

Thank you! That did it ðŸ™‚

I forgot to mention that I'm on 13.4.19 . There it's

experimental: {
  logging: 'verbose'
}

btw.

Is it somewhere documented? I haven't found anything in the official docs.

@South Polar Skua Is it somewhere documented? I haven't found anything in the official docs.

joulev

2023-10-24T10:13:25.000Z

not that i know of. i only know about this after seeing some members here talking about it

i think they will announce this and start documenting it in the conf