#regenerate ssr page

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

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In Next.js, you can use the feature called Incremental Static Regeneration (ISR) to regenerate Server Side Rendered (SSR) pages. However, the regeneration is not directly tied to changes in URL query parameters. Instead, it's typically used to regenerate pages at a specified interval or on-demand.

To regenerate a page on-demand, you can create a secret token known only by your Next.js app and use it to prevent unauthorized access to the revalidation API Route. You can access the route (either manually or with a webhook) with the following URL structure:

<https://<your-site.com>/api/revalidate?secret=<token>>

Next, add the secret as an Environment Variable to your application. Finally, create the revalidation API Route:

export default async function handler(req, res) {
 // Check for secret to confirm this is a valid request
 if (req.query.secret !== process.env.MY_SECRET_TOKEN) {
 return res.status(401).json({ message: 'Invalid token' })
 }
 
 try {
 // this should be the actual path not a rewritten path
 // e.g. for "/blog/[slug]" this should be "/blog/post-1"
 await res.revalidate('/path-to-revalidate')
 return res.json({ revalidated: true })
 } catch (err) {
 // If there was an error, Next.js will continue
 // to show the last successfully generated page
 return res.status(500).send('Error revalidating')
 }
}

This will allow you to trigger a revalidation of the page on-demand. However, it's important to note that this doesn't directly tie the regeneration to changes in URL query parameters. If you need to regenerate the page whenever a specific query parameter changes, you might need to implement a custom solution that watches for changes in the query parameters and triggers the revalidation when a change is detected.

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@digital anchor kapa.ai is still learning and improving, please let us how it did by reacting below

digital anchor
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@elder socket can i ISR in nextjs 13

elder socketBOT
#

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

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Yes, you can use Incremental Static Regeneration (ISR) in Next.js 13. ISR allows you to create or update static pages after you've built your site, without needing to rebuild the entire site. This feature enables you to use static-generation on a per-page basis, and you can retain the benefits of static while scaling to millions of pages.

To use ISR, you need to add the revalidate prop to getStaticProps. Here's an example:

export async function getStaticProps() {
  const allPosts = await getAllPostsForHome()
  return {
    props: { allPosts },
    revalidate: 10, // the page will be regenerated after 10 seconds
  }
}

In this example, the revalidate prop is set to 10, which means the page will be regenerated every 10 seconds.

You can also trigger ISR on-demand. To do this, you need to create an Environment Variable to store a revalidation secret and create an API Route that checks for the secret, then triggers revalidation. Here's an example:

import { revalidatePath } from 'next/cache';
 
export async function GET(request: Request) {
 const { searchParams } = new URL(request.url);
 if (searchParams?.secret !== process.env.MY_SECRET_TOKEN) {
 return new Response(`Invalid credentials`, {
 status: 500,
 });
 }
 revalidatePath('/blog-posts');
 return new Response(
 {
 revalidated: true,
 now: Date.now(),
 },
 {
 status: 200,
 },
 );
}

In this example, the API route triggers revalidation if the query parameter ?secret matches a secret Environment Variable.

#

@digital anchor kapa.ai is still learning and improving, please let us how it did by reacting below

digital anchor
#

@elder socket ISR WITH APP ROUTER NEXTJS 13

elder socketBOT
#

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

#

In Next.js 13, you can use Incremental Static Regeneration (ISR) with the app router. ISR allows you to update static content without redeploying your site.

To enable ISR with the app router, you can add an options object with a revalidate property to your fetch requests. Here's an example:

// `app` directory
 
async function getPosts() {
 const res = await fetch(`<https://.../posts`,> { next: { revalidate: 60 } })
 const data = await res.json()
 
 return data.posts
}
 
export default async function PostList() {
 const posts = await getPosts()
 
 return posts.map((post) => <div>{post.name}</div>)
}

In this example, the revalidate property is set to 60, which means the page will be regenerated every 60 seconds.

You can also trigger ISR on-demand. To do this, you need to create an Environment Variable to store a revalidation secret and create an API Route that checks for the secret, then triggers revalidation. Here's an example:

import { revalidatePath } from 'next/cache';
 
export async function GET(request: Request) {
 const { searchParams } = new URL(request.url);
 if (searchParams?.secret !== process.env.MY_SECRET_TOKEN) {
 return new Response(`Invalid credentials`, {
 status: 500,
 });
 }
 revalidatePath('/blog-posts');
 return new Response(
 {
 revalidated: true,
 now: Date.now(),
 },
 {
 status: 200,
 },
 );
}

In this example, the API route triggers revalidation if the query parameter ?secret matches a secret Environment Variable.