Nuxt•4w ago

useServerSeoMeta ref/reactive vs await and one time rendering

Hello :), I read here and there (sorry, not very helpful ^^") that I should give directly the ref or computed to useHead/useSeoMeta/useServerSeoMeta so I'm assured the value will be updated to the right one. That being said, especially with useServerSeoMeta, not only it's server side but for SEO but even more og/twitter the first render matter AND it awaits on the useFetch to have the right value. What is the point in making it reactive since it HAS to have the right value right away anyway ?

5 Replies

kapa.ai•4w ago

Hi @Omnislash. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Your question touches on an important aspect of SEO optimization in Nuxt applications. Let's break this down based on the available information: 1. Reactivity with useServerSeoMeta: The useServerSeoMeta composable is indeed designed for server-side rendering of SEO meta tags. As mentioned in the Nuxt documentation (https://nuxt.com/docs/api/composables/use-server-seo-meta), it's a performance-focused utility that doesn't do anything on the client side. 2. First render importance: You're correct that for SEO, especially for Open Graph and Twitter meta tags, the first render is crucial. Search engines and social media platforms typically read these tags when the page is first loaded. 3. Awaiting useFetch: If you're using useFetch to get data for your meta tags, you should indeed await this before setting the meta tags to ensure you have the correct values. 4. Reactivity vs. one-time rendering: The point about making it reactive might seem counterintuitive given the server-side nature of useServerSeoMeta. However, there are a couple of reasons why reactivity can still be useful: a. Server-side updates: If your server-side code includes any asynchronous operations or state changes before the initial render, reactive values ensure that the latest data is used for the meta tags.
b. Code reusability: Using reactive values allows you to use the same code structure across different composables (useHead, useSeoMeta, useServerSeoMeta), making your code more consistent and easier to maintain. That being said, for many use cases with useServerSeoMeta, you're right that a one-time setting of values after awaiting your data fetching would be sufficient. Here's an example of how you might use it:

<script setup lang="ts">
const { data: project } = await useFetch('/api/project')
useServerSeoMeta({
  title: project.value.title,
  ogTitle: project.value.title,
  description: project.value.description,
  ogDescription: project.value.description,
  ogImage: project.value.image,
})
</script>

<script setup lang="ts">
const { data: project } = await useFetch('/api/project')
useServerSeoMeta({
  title: project.value.title,
  ogTitle: project.value.title,
  description: project.value.description,
  ogDescription: project.value.description,
  ogImage: project.value.image,
})
</script>

In this case, the meta tags are set once after the data is fetched, which should be sufficient for most SEO purposes. To conclude, while reactivity is a powerful feature of Vue and Nuxt, for useServerSeoMeta specifically, a one-time setting of values after data fetching is often adequate for SEO purposes. The reactivity support is there for flexibility and consistency with other composables, but it's not always necessary to leverage it fully. Nuxt SEO Meta documentation (https://nuxt.com/docs/getting-started/seo-meta) ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4w ago

<@305772639438503936> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

OmnislashOP•4w ago

Point 4.a sounds very specific. Can you give me an exemple where an asyncchronous operation or state change will impact the initial render of the SEO values ?

harlan•4w ago

It's no about making it reactive it's that the data being returned from useAsyncData or useFetch is already reactive You don't need to pass in the ref, it's just less code and if the data does change the server lifecycle, it will be updated

OmnislashOP•4w ago

True ! Thanks 🙂

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useServerSeoMeta ref/reactive vs await and one time rendering