Nuxt•4w ago

How to avoid duplicated requests between the server side of two island components?

Hey, I have 3 island components (I use the concept with .server.vue and .client.vue files by island component). I want to fetch the same data from the 3 components, from server side. I don't find the way to share the cache of a useAsyncData between all components, in server side. Is useAsyncData the good way? Is there another way to share data and avoid multiple fetchs? Thanks 🥲

2 Replies

kapa.ai•4w ago

Hi @Sun. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To avoid duplicated requests between the server side of multiple island components in Nuxt, you can use the useAsyncData composable with a unique key to share the cache. Here's how you can approach this: 1. Use useAsyncData with a unique key:
In each of your server-side components (.server.vue files), use useAsyncData with the same unique key for the data you want to share. This will ensure that the data is cached and reused across components.

   <script setup>
   const { data } = await useAsyncData('shared-data-key', () => $fetch('/api/your-endpoint'))
   </script>

   <script setup>
   const { data } = await useAsyncData('shared-data-key', () => $fetch('/api/your-endpoint'))
   </script>

By using the same key ('shared-data-key' in this example) across your components, Nuxt will cache the result of the first request and reuse it for subsequent calls with the same key. 2. Consider using useFetch:
useFetch is a wrapper around useAsyncData and $fetch, which might be more convenient in some cases. It automatically generates a key based on the URL, so you don't need to specify one manually:

   <script setup>
   const { data } = await useFetch('/api/your-endpoint')
   </script>

   <script setup>
   const { data } = await useFetch('/api/your-endpoint')
   </script>

3. Use sharedPrerenderData experimental feature:
If you're prerendering your site, you can enable the sharedPrerenderData experimental feature in your nuxt.config.ts file. This will automatically share payload data between prerendered pages:

   export default defineNuxtConfig({
     experimental: {
       sharedPrerenderData: true
     }
   })

   export default defineNuxtConfig({
     experimental: {
       sharedPrerenderData: true
     }
   })

Nuxt Configuration Reference (https://nuxt.com/docs/api/nuxt-config#sharedprerenderdata) 4. Use useNuxtData:
If you need to access the cached data in other components without triggering a new fetch, you can use useNuxtData:

   <script setup>
   const { data } = useNuxtData('shared-data-key')
   </script>

   <script setup>
   const { data } = useNuxtData('shared-data-key')
   </script>

useNuxtData Documentation (https://nuxt.com/docs/api/composables/use-nuxt-data) By implementing these strategies, you should be able to avoid duplicated requests between your server-side island components. The key is to use a consistent caching key across components and leverage Nuxt's built-in caching mechanisms. Remember that when using useAsyncData or useFetch, the data will be automatically shared between the server and client sides, preventing unnecessary refetching during hydration. Data Fetching Documentation (https://nuxt.com/docs/getting-started/data-fetching) ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

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How to avoid duplicated requests between the server side of two island components?