Nuxt•2mo ago

Cross posting: "How to prevent Nuxt state being serialised to DOM and served from CDN cache?"

Hi, I wanted to post my first question here, about how to add HTTP Headers in a page, so we can skip the CDN caching (CloudFlare respects the Cache-Control header and other headers if you are able to append those in the response). It was put into words by a coworker of mine in SO: https://stackoverflow.com/questions/79166095/how-to-prevent-nuxt-state-being-serialized-to-dom-and-served-from-cdn-cache Would appreciate any pointers 🙏❤️:usefetchwrong:

Stack Overflow

How to prevent Nuxt state being serialized to DOM and served from C...

I need help about Nuxt that would help me prevent some of our SSR (Server-Side Rendered) pages when user information has been fetched and stored in our pinia store being cached. Problem: Currently,...

9 Replies

kapa.ai•2mo ago

Hi @paul_melero. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To address the issue of preventing Nuxt state from being serialized to the DOM and served from CDN cache, there are a few approaches you can consider: 1. Use Route Rules: Nuxt 3 provides a powerful feature called Route Rules that allows you to set caching strategies for specific routes. You can use this to disable caching for certain pages or set appropriate cache control headers. Here's an example of how to set it up in your nuxt.config.ts:

   export default defineNuxtConfig({
     routeRules: {
       '/your-dynamic-page': { swr: true }
     }
   })

   export default defineNuxtConfig({
     routeRules: {
       '/your-dynamic-page': { swr: true }
     }
   })

This sets up stale-while-revalidate (SWR) caching for the specified route, which can help ensure fresher content. Hybrid Rendering (https://nuxt.com/docs/guide/concepts/rendering#hybrid-rendering) 2. Use useFetch with a unique key: When using useFetch, you can add a key option with a unique value (like the current timestamp) to force a re-fetch on each page load:

   const { data } = await useFetch('/api/data', {
     key: Date.now()
   })

   const { data } = await useFetch('/api/data', {
     key: Date.now()
   })

This approach can help prevent caching of the fetched data. Stack Overflow (https://stackoverflow.com/questions/77073604) 3. Use $fetch instead of useFetch: If you're calling the fetch function within another function (not at the top level of your component), consider using $fetch instead of useFetch. This bypasses Nuxt's built-in caching mechanism:

   const data = await $fetch('/api/data')

   const data = await $fetch('/api/data')

GitHub Issue Comment (https://github.com/nuxt/nuxt/issues/29364) 4. Set Cache-Control headers: You can set Cache-Control headers directly in your API routes or server middleware to control caching behavior. Here's an example of how to set headers in a Nuxt API route:

   export default defineEventHandler((event) => {
     setResponseHeaders(event, {
       'Cache-Control': 'no-store, max-age=0'
     })
     // Your API logic here
   })

   export default defineEventHandler((event) => {
     setResponseHeaders(event, {
       'Cache-Control': 'no-store, max-age=0'
     })
     // Your API logic here
   })

H3 Utils Documentation (https://h3.unjs.io/utils/response) 5. Disable Cloudflare's caching features: If you're using Cloudflare, make sure to disable certain optimization features that might interfere with your Nuxt application: - Disable Auto Minify for JavaScript, CSS, and HTML - Disable Rocket Loader™ - Disable Mirage - Disable Email Address Obfuscation Nuxt Deployment Documentation (https://nuxt.com/docs/getting-started/deployment#cdn-proxy) Remember that the most appropriate solution depends on your specific use case and requirements. You might need to combine multiple approaches to achieve the desired result. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@380083603050332160> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

paul_meleroOP•2mo ago

@kapa.ai none of the things suggested by the AI were correct, I guess I should have provided the content of the SO post...

kapa.ai•2mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I apologize, but I don't have access to any additional file or explanation that you might be referring to. As an AI assistant specialized in answering questions about Nuxt, I can only work with the information provided in the conversation history and the knowledge sources given to me. If you have a specific question about Nuxt or would like to provide more details about your issue, please feel free to ask or share that information directly in your message. I'll be happy to help based on the information you provide. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@380083603050332160> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

casa•2mo ago

Hi @paul_melero How can I replicate your issue?

paul_meleroOP•2mo ago

Yes, i understand a reproduction woukd be helpful. Will prepare tomorrow

casa•2mo ago

Thank you.

manniL•2mo ago

@paul_melero How do you want to "fetch" the data then I wonder? If they aren't backed into the site, no hydration is possible and the app would fail to boot

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Cross posting: "How to prevent Nuxt state being serialised to DOM and served from CDN cache?"