Nuxt•2w ago

Vercel doesn't show parts of the UI

Hey, I have a problem with deploying my Nuxt application on Vercel: parts of the UI aren't shown. The first screenshot shows it, if I run pnpm build & pnpm preview. The second screen shows the real result. I think the data is not even sent to the client. I hope somebody can help me.

2 Replies

kapa.ai•2w ago

Hi @Leo. 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 you've provided, it sounds like you're experiencing an issue where your Nuxt application works correctly in local preview but has rendering issues when deployed to Vercel. This is a common issue that can happen for several reasons. Possible Causes and Solutions 1. JSX/Component Rendering Issues There might be an issue with how components are being rendered after compilation. One user reported a similar problem where JSX components worked in development but not after building:

// Instead of using kebab-case component names like:
<a-tag>

// Try using explicit imports and PascalCase:
import { ATag } from '#components'
<ATag>

// Instead of using kebab-case component names like:
<a-tag>

// Try using explicit imports and PascalCase:
import { ATag } from '#components'
<ATag>

This approach is more similar to React's component usage style and might resolve rendering issues after build GitHub Issue #28289. 2. API Request Caching Vercel might be caching your API requests, which could prevent fresh data from being displayed. This has been reported as an issue where Vercel caches API responses, even for POST requests: - You might see x-vercel-cache: HIT headers in your responses - This can affect data fetching and cause UI elements dependent on data to not appear GitHub Issue #19353 3. Client-Side Hydration Issues If you're using useFetch or other data fetching methods, there might be issues with how the data is being hydrated on the client side: - Try wrapping your data fetching logic in useAsyncData with the correct structure:

// Instead of:
if (authToken.value) {
  await useAsyncData(async () => {
    fetchData();
  });
}

// Try:
await useAsyncData(async () => {
  if (authToken.value) {
    await fetchData();
  }
});

// Instead of:
if (authToken.value) {
  await useAsyncData(async () => {
    fetchData();
  });
}

// Try:
await useAsyncData(async () => {
  if (authToken.value) {
    await fetchData();
  }
});

This ensures proper server-side rendering and client-side hydration Stack Overflow #78402291. 4. JS Chunk Loading Issues After deployment, you might experience 404 errors for JavaScript chunks: - This can happen after every deployment if old assets aren't preserved - Users might need to hard refresh to get the new chunks GitHub Issue #31336 5. Check Your Rendering Mode Make sure your rendering configuration is appropriate for your application:

// In nuxt.config.ts
export default defineNuxtConfig({
  // For specific routes that need client-side rendering only
  routeRules: {
    '/problem-route/**': { ssr: false }
  }
})

// In nuxt.config.ts
export default defineNuxtConfig({
  // For specific routes that need client-side rendering only
  routeRules: {
    '/problem-route/**': { ssr: false }
  }
})

You can use hybrid rendering to specify different rendering strategies for different routes Nuxt Docs on Hybrid Rendering. Next Steps 1. Check your browser's network tab for any 404 errors or unexpected caching 2. Verify that your data fetching is properly structured for SSR 3. Consider using Vercel's deployment settings to preserve assets between deployments 4. If using Edge-Side Rendering, ensure it's properly configured Nuxt Docs on Edge-Side Rendering If you need more specific help, please share your data fetching code and any error messages you're seeing in the console. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

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Vercel doesn't show parts of the UI

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