no cache | Next.js | Page 1

grizzled dagger Dec 28, 2023, 7:41 PM

#

what does nocache do in nextjs cache

round thornBOT Dec 28, 2023, 7:41 PM

#

Hi @grizzled dagger. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

In Next.js, the no-store option in caching is used to opt out of caching for individual fetch requests. When you set the cache option to no-store in a fetch request, Next.js fetches the resource from the remote server on every request without looking in the cache, and it will not update the cache with the downloaded resource. This means that the data will be fetched every time the fetch request is called.

Here's an example of how to use it:

fetch(`<https://...`,> { cache: 'no-store' })

This will result in the route being dynamically rendered every request. However, you can still have other cached data requests in the same route.

You can also use the --no-cache flag with next lint to disable caching for ESLint. This is useful if you include any ESLint rules that depend on more than the contents of a single source file.

Here's how to use it:

next lint --no-cache

For more information, you can refer to the Next.js documentation on fetch options.cache (https://nextjs.org/docs/app/building-your-application/caching) and ESLint caching (https://nextjs.org/docs/app/building-your-application/configuring/eslint).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@grizzled dagger kapa.ai is still learning and improving, please let us know how it did by reacting below

grizzled dagger Dec 28, 2023, 7:42 PM

#

@round thorn what are all the types of fetch caches and when to use them?

round thornBOT Dec 28, 2023, 7:42 PM

#

Let me check the knowledge base for you. One moment! :books:

#

In Next.js, the fetch API is extended to allow each request on the server to set its own caching semantics. The cache option in fetch indicates how a server-side request will interact with the server's Data Cache. Here are the different types of fetch caches:

force-cache: This is the default option. It means that the data can be fetched at build time or request time, cached, and reused on each data request. It's used when you want to cache the returned values of fetch in the Data Cache on the server.

fetch('<https://...',> { cache: 'force-cache' })

no-store: This option is used to opt out of caching for individual fetch requests. The data will be fetched every time the fetch request is called. It's used when you want to fetch data dynamically, on every request.

fetch('<https://...',> { cache: 'no-store' })

only-if-cached: This option is used to allow a fetch request to be fulfilled from the cache only. It's used when you want to ensure that the data is always fetched from the cache, and not from the network.

fetch('<https://...',> { cache: 'only-if-cached' })

reload: This option is used to fetch the resource from the network, bypassing the cache. It's used when you want to ensure that the data is always fetched from the network, and not from the cache.

fetch('<https://...',> { cache: 'reload' })

You can view all the available cache options in the fetch API reference (https://nextjs.org/docs/app/api-reference/functions/fetch).

#

The choice of which cache option to use depends on your specific use case and the behavior you want to achieve. For example, if you want to ensure that the data is always fresh and up-to-date, you might want to use `no-store` or `reload`. If you want to improve performance by reusing cached data, you might want to use `force-cache` or `only-if-cached`.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

grizzled dagger Dec 28, 2023, 7:44 PM

#

@round thorn so with force cache when will the data change and be updated?
also whats the diff between nostore and reload

round thornBOT Dec 28, 2023, 7:44 PM

#

Let me check the knowledge base for you. One moment! :books:

#

With the force-cache option in Next.js, the data will be updated under the following conditions:

If there is a matching request in its Data Cache and it is fresh, it will be returned from the cache.
If there is no match or a stale match, Next.js will fetch the resource from the remote server and update the cache with the downloaded resource.

This means that the data will change and be updated whenever there is no match in the cache or the cached data is stale. The exact timing of when the data becomes stale depends on the specific caching policies and mechanisms used by your application.

As for the difference between no-store and reload:

no-store: This option tells Next.js to fetch the resource from the remote server on every request without looking in the cache, and it will not update the cache with the downloaded resource. This means that the data will be fetched every time the fetch request is called.
reload: This option is used to fetch the resource from the network, bypassing the cache (i.e., it won't use cached data even if it exists). However, unlike no-store, reload does not prevent the fetched data from being cached for future requests. This means that the data will be fetched from the network for the current request, but it may be cached and reused for future requests.

For more information, you can refer to the Next.js documentation on fetch options.cache (https://nextjs.org/docs/app/building-your-application/caching#fetch-optionscache).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

#

@grizzled dagger kapa.ai is still learning and improving, please let us know how it did by reacting below

grizzled dagger Dec 28, 2023, 7:45 PM

#

@round thorn what determiens the staleness

round thornBOT Dec 28, 2023, 7:45 PM

#

Let me check the knowledge base for you. One moment! :books:

#

The staleness of data in a cache is typically determined by cache control policies, which can be set by the server when the data is initially fetched. These policies can include headers like Cache-Control, Expires, and ETag, which tell the cache how long the data should be considered fresh.

In the context of Next.js and its Data Cache, the documentation does not provide specific details on how staleness is determined. However, it does mention the use of the next.revalidate option of fetch to configure the caching behavior. This suggests that Next.js may use a revalidation strategy, where the cache will check with the server if the data has changed since it was last fetched. If the data has changed, the cache will update the stored data with the new data from the server.

For more specific details on how Next.js determines the staleness of data in its Data Cache, you may need to refer to the Next.js source code or reach out to the Next.js community or support.

For more information, you can refer to the Next.js documentation on fetch options.next.revalidate (https://nextjs.org/docs/app/building-your-application/caching#fetch-optionsnextrevalidate).

#no cache

For more information, you can refer to the Next.js documentation on fetch options.cache (https://nextjs.org/docs/app/building-your-application/caching) and ESLint caching (https://nextjs.org/docs/app/building-your-application/configuring/eslint).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

For more information, you can refer to the Next.js documentation on fetch options.cache (https://nextjs.org/docs/app/building-your-application/caching#fetch-optionscache).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

For more information, you can refer to the Next.js documentation on fetch options.next.revalidate (https://nextjs.org/docs/app/building-your-application/caching#fetch-optionsnextrevalidate).

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: