N
Nuxt•3d ago
Rust

Hydration Mismatch on Categories Page with Pagination

The categories page experiences a hydration mismatch when pagination is active. This issue does not occur when there are no additional pages to paginate. The problem seems to arise due to asynchronous data fetching, causing discrepancies between the server-rendered and client-rendered versions of the page. Website: https://the-fineprint.com/categories/real-estate Env: Nuxt 3 Minimal runnable reproduction on Stackblitz https://stackblitz.com/edit/nuxt-3-b1hexw9n?file=app%2Fpages%2Fcategories%2F[category].vue How can I solve this issue?
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2 Replies
kapa.ai
kapa.ai•3d ago
Hi @Rust. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Based on the information provided in the knowledge sources, I can offer some insights and potential solutions to your hydration mismatch issue on the categories page with pagination in Nuxt 3. The hydration mismatch you're experiencing is likely due to differences in the data fetched on the server and client sides, especially when pagination is involved. This is a common issue in server-side rendering (SSR) scenarios. Here are some approaches to solve this issue: 1. Use useLazyFetch or useLazyAsyncData: Instead of using $fetch directly, you can use useLazyFetch or useLazyAsyncData. These composables ensure that data fetching only happens on the client side, avoiding potential mismatches between server and client renders. Stack Overflow Post > Handling simple hydration mismatch after fetch in Nuxt 3 suggests: 
   <script setup>
   const { data } = await useLazyFetch('/api/your-endpoint')
   </script>

   <template>
     <client-only>
       <!-- Your paginated content here -->
     </client-only>
   </template>
   
   <script setup>
   const { data } = await useLazyFetch('/api/your-endpoint')
   </script>

   <template>
     <client-only>
       <!-- Your paginated content here -->
     </client-only>
   </template>
2. Wrap dynamic content in <client-only>: If the paginated content is causing the mismatch, you can wrap it in a <client-only> component. This ensures that the content is only rendered on the client side, avoiding hydration mismatches. 3. Use useAsyncData with proper options: If you need server-side rendering for SEO purposes, you can use useAsyncData with the watch option to re-fetch data when route parameters change. This can help ensure consistency between server and client renders. Docs > Api > Composables > useAsyncData provides an example: 
   <script setup>
   const route = useRoute()
   const { data } = await useAsyncData(
     'categories',
     () => $fetch(`/api/categories/${route.params.category}`),
     { watch: [route.params.category] }
   )
   </script>
   
   <script setup>
   const route = useRoute()
   const { data } = await useAsyncData(
     'categories',
     () => $fetch(`/api/categories/${route.params.category}`),
     { watch: [route.params.category] }
   )
   </script>
4. Consider using CSR for pagination: If SEO is not a concern for paginated content, you can set the page as a client-side rendered (CSR) component. This can be done in your nuxt.config.ts: 
   export default defineNuxtConfig({
     routeRules: {
       '/categories/**': { ssr: false }
     }
   })
   
   export default defineNuxtConfig({
     routeRules: {
       '/categories/**': { ssr: false }
     }
   })
This approach is mentioned in Stack Overflow Post > Handling simple hydration mismatch after fetch in Nuxt 3. 5. Ensure data consistency: Make sure that the data you're working with in your component is not being modified in a way that could cause differences between server and client renders. Avoid mutating props or shared state that could lead to inconsistencies. Stack Overflow Post > Nuxt 3 Hydration text mismatch in ... error when using shift() highlights this issue and suggests creating a local copy of data to avoid modifying shared state: 
   <script setup>
   const props = defineProps<{ data: any[] }>()
   const localData = [...props.data]
   // Perform operations on localData instead of props.data
   </script>
   
   <script setup>
   const props = defineProps<{ data: any[] }>()
   const localData = [...props.data]
   // Perform operations on localData instead of props.data
   </script>
By implementing one or a combination of these approaches, you should be able to resolve the hydration mismatch on your categories page with pagination. Remember to test thoroughly to ensure the solution works across different scenarios and doesn't introduce new issues. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.ai•3d ago
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