N
Nuxt•3w ago
8ctavio

Calling server utilities in SFCs during SSR

Hi, I am trying to use import.meta.server to execute some server code in SFCs during SSR, like this: 
<script setup>
import { foo } from '~~/server/path/to/foo'
import { bar } from '#imports'
const data = useAsyncData(() => import.meta.server ? foo.bar() : bar())
</script>
<script setup>
import { foo } from '~~/server/path/to/foo'
import { bar } from '#imports'
const data = useAsyncData(() => import.meta.server ? foo.bar() : bar())
</script>
However, importing foo produces some side effects that break the client. Is there a way to properly import/consume server utils that may produce side-effects in SFCs? An alternative could be to create an endpoint to call instead of directly calling foo.bar: 
const data = useAsyncData(() => import.meta.server ? $fetch('/foo') : bar())
const data = useAsyncData(() => import.meta.server ? $fetch('/foo') : bar())
Then, foo could normally be imported/consumed in /foo's route handler; but it does not seem right to create routes for this purpose. Is there another way to safely expose server side utils to SFCs, maybe through something similar to nuxt's SSRContext?
2 Replies
kapa.ai
kapa.ai•3w ago
Hi @8ctavio. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- I understand your challenge with importing server utilities in Single File Components (SFCs) during SSR. Unfortunately, the knowledge sources provided don't contain specific information about safely importing server utilities with side effects in SFCs or using import.meta.server for conditional server-side execution in components. However, based on the knowledge sources, I can confirm that the recommended approach in Nuxt 3 is to use API routes for server-side logic rather than directly importing server utilities in components. According to the Stack Overflow discussion about $fetch, useAsyncData and useFetch, the proper pattern is: 
const { data } = await useAsyncData('item', () => $fetch('/api/item'))
// or the shorthand
const { data } = await useFetch('/api/item')
const { data } = await useAsyncData('item', () => $fetch('/api/item'))
// or the shorthand
const { data } = await useFetch('/api/item')
The knowledge sources emphasize that useFetch and useAsyncData are designed to handle data fetching in a way that: - Prevents double fetching (once on server, once on client) - Properly transfers state from server to client during hydration - Should be called directly in setup functions, plugins, or route middleware While creating API routes might seem like extra work, this is actually the intended Nuxt architecture for separating server-side logic from client-side components. This approach ensures that server-only code and its side effects remain isolated on the server and don't break the client bundle. The knowledge sources don't explicitly mention a way to conditionally import server utilities with side effects directly in SFCs using import.meta.server, so the API route approach you mentioned appears to be the recommended pattern, even though it requires creating endpoints. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.ai•3w ago
<@538126631076626442> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Did you find this page helpful?