I am using next.js 14 with app router. I need some pages to never cache and always request data each time the page is accessed. How can I handle this
#no caching for page in app router
golden mica
slate galleonBOT
Hi @golden mica. 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, there are multiple layers of caching and different ways to invalidate different parts of the cache. However, it's important to note that you cannot opt out of the Router Cache. But you can invalidate it by calling router.refresh, revalidatePath, or revalidateTag. This will clear the cache and make a new request to the server, ensuring the latest data is shown[^1^].
For individual data fetches, you can opt out of caching by setting the cache option to no-store. This means data will be fetched whenever fetch is called[^2^].
// Opt out of caching for an individual `fetch` request
fetch(`<https://...`,> { cache: 'no-store' })
You can also opt out of prefetching by setting the prefetch prop of the <Link> component to false. However, this will still temporarily store the route segments for 30s to allow instant navigation between nested segments, such as tab bars, or back and forward navigation. Visited routes will still be cached[^1^].
Please note that you cannot set Cache-Control headers in next.config.js for pages or assets, as these headers will be overwritten in production to ensure that responses and static assets are cached effectively[^3^].
If your Next.js application is deployed to Vercel, the Vercel Data Cache is automatically enabled to cache segment-level data alongside ISR in the app router[^4^].
^1^]: (source: [Next.js Docs (https://nextjs.org/docs/app/building-your-application/caching#opting-out-3))
^2^]: (source: [Next.js Docs (https://nextjs.org/docs/app/building-your-application/caching#opting-out-1))
^3^]: (source: [Next.js Docs (https://nextjs.org/docs/app/api-reference/next-config-js/headers#cache-control))
^4^]: (source: [Vercel Docs (https://vercel.com/docs/infrastructure/data-cache))
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
golden mica
Okay let’s say I have a /user page. How do I make it invalidate each time it is accessed?
@slate galleon Okay let’s say I have a /user page. How do I make it invalidate each time it is accessed?
slate galleonBOT
Let me check the knowledge base for you. One moment! :books:
To ensure that the /user page always fetches fresh data each time it is accessed, you can use the fetch function with the cache option set to no-store in your data fetching method. This will ensure that the data is refetched on every request[^2^].
Here's an example of how you can do this:
export default async function UserPage() {
// This request should be refetched on every request.
const userData = await fetch(`<https://.../user`,> { cache: 'no-store' })
// ...rest of your code
}
In this example, <https://.../user> should be replaced with the actual URL where you're fetching the user data from.
Please note that this will only ensure that the data for this specific fetch request is always fresh. If there are other parts of your page that also need to always fetch fresh data, you would need to use the same cache: 'no-store' option for those fetch requests as well.
^2^]: (source: [Next.js Docs (https://nextjs.org/docs/app/building-your-application/upgrading/app-router-migration#step-6-migrating-data-fetching-methods))
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
golden mica
Is isr still possible in the app router?
@slate galleon Is isr still possible in the app router?
slate galleonBOT
Let me check the knowledge base for you. One moment! :books:
Yes, Incremental Static Regeneration (ISR) is still possible in the App Router in Next.js. You can enable ISR by adding a revalidate property to your fetch requests[^1^].
Here's an example of how you can do this:
await fetch('<https://api.vercel.app/blog',> {
next: { revalidate: 10 }, // Seconds
});
In this example, the revalidate: 10 option means that the data will be revalidated every 10 seconds. If the data changes during this time, the page will be regenerated with the new data.
Please note that when self-hosting, ISR is limited to a single region workload. Statically generated pages are not distributed closer to visitors by default, without additional configuration or vendoring of a CDN. By default, self-hosted ISR does not persist generated pages to durable storage. Instead, these files are located in the Next.js cache (which expires)[^1^].
^1^]: (source: [Vercel Docs (https://vercel.com/docs/frameworks/nextjs))
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
golden mica
@slate galleon how do I include isr if I am requested data with a third party library
slate galleonBOT
Let me check the knowledge base for you. One moment! :books:
To include Incremental Static Regeneration (ISR) when requesting data with a third-party library, you would typically use the getStaticProps function in Next.js, which allows you to fetch data at build time and revalidate it at intervals you specify.
However, the knowledge sources provided do not include specific information on how to use ISR with third-party libraries. The implementation would depend on the specific library you're using.
Here's a general example of how you might use ISR with a third-party library:
export async function getStaticProps() {
// Use your third-party library to fetch data here
const data = await someThirdPartyLibrary.fetchData();
return {
props: {
data,
},
// Next.js will attempt to re-generate the page:
// - When a request comes in
// - At most once every 10 seconds
revalidate: 10, // In seconds
}
}
In this example, someThirdPartyLibrary.fetchData() should be replaced with the actual method you're using to fetch data with your third-party library.
Please refer to the documentation of the specific third-party library you're using for more detailed instructions on how to fetch data with that library.
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
golden mica
@slate galleon how do I include isr if I am requested data with a third party library in the app router
slate galleonBOT
Let me check the knowledge base for you. One moment! :books:
In the App Router, you can enable Incremental Static Regeneration (ISR) by adding a revalidate property to your data fetching requests[^1^]. This applies even when you're using a third-party library to fetch data.
Here's an example of how you can do this:
const data = await someThirdPartyLibrary.fetchData('<https://api.vercel.app/blog',> {{
next: {{ revalidate: 10 }}, // Seconds
}});
In this example, someThirdPartyLibrary.fetchData() should be replaced with the actual method you're using to fetch data with your third-party library. The revalidate: 10 option means that the data will be revalidated every 10 seconds. If the data changes during this time, the page will be regenerated with the new data.
Please note that the exact way to pass these options might vary depending on the third-party library you're using. You should refer to the documentation of the specific library for more detailed instructions.
^1^]: (source: [Vercel Docs (https://vercel.com/docs/frameworks/nextjs))
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
golden mica
@slate galleon I want to create a blog site with the app router. How do you recommend I set up caching etc
slate galleonBOT
Let me check the knowledge base for you. One moment! :books:
Creating a blog site with the App Router in Next.js involves several steps, including setting up routing, fetching data, and configuring caching. Here's a general guide on how you can do this:
-
Routing: You can create your first page and shared layout with the App Router[^1^]. Use the
<Link>component for client-side navigation and prefetching[^5^]. -
Fetching Data: Use the
fetchfunction or your favorite library to fetch data for your blog posts. You can fetch and cache data and revalidate the data by cache tag or path by defining a stale time or programmatically purging the cache[^4^]. -
Caching: Next.js has an in-memory client-side cache called the Router Cache. As users navigate around the app, the React Server Component Payload of prefetched route segments and visited routes are stored in the cache[^3^]. This improves performance by reducing the number of requests and data transferred.
-
Incremental Static Regeneration (ISR): Use Incremental Static Regeneration to update static pages after they've been built, without rebuilding your entire site[^5^]. You can enable ISR by adding a
revalidateproperty to yourfetchrequests[^4^].
Here's an example of how you can fetch data and enable ISR:
const data = await fetch('<https://api.your-blog.com/posts',> {{
next: {{ revalidate: 10 }}, // Seconds
}});
In this example, <https://api.your-blog.com/posts> should be replaced with the actual URL where you're fetching your blog posts from. The revalidate: 10 option means that the data will be revalidated every 10 seconds. If the data changes during this time, the page will be regenerated with the new data.
Please note that the exact way to set up routing, fetching data, and configuring caching might vary depending on your specific requirements and the structure of your blog site.