Nuxt•2mo ago

What's the recommended way to set cache-control for index.html?

For some web hosting platforms, like Vercel, they set cache-control to have a max-age of 0 for index.html. I see other settings for other Nuxt dist'd assets with larger cache-control headers. Can you explain how the recommended defaults are set within Nuxt applications, and point me to any Nuxt modules? Or do I have to define my own Nuxt Middleware plugin?

2 Replies

kapa.ai•2mo ago

Hi @jess. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To set cache-control headers for index.html and other assets in a Nuxt application, you have a few options. Let's explore the recommended approaches based on the information provided in the knowledge sources: 1. Using Route Rules: Nuxt provides a powerful feature called "Route Rules" that allows you to define caching strategies for different routes, including the index page. You can set this up in your nuxt.config.ts file:

export default defineNuxtConfig({
  routeRules: {
    '/': { swr: true }, // or specify a duration like { swr: 3600 }
  }
})

export default defineNuxtConfig({
  routeRules: {
    '/': { swr: true }, // or specify a duration like { swr: 3600 }
  }
})

This approach uses the Stale-While-Revalidate (SWR) strategy, which can be beneficial for your index page. It allows the page to be served from cache while being revalidated in the background Nuxt Docs - Hybrid Rendering (https://nuxt.com/docs/guide/concepts/rendering#hybrid-rendering). 2. Using Nitro's Route Rules: If you need more fine-grained control, you can use Nitro's route rules to set specific cache headers:

export default defineNitroConfig({
  routeRules: {
    '/': { cache: { maxAge: 60 * 60 } }, // Cache for 1 hour
  },
})

export default defineNitroConfig({
  routeRules: {
    '/': { cache: { maxAge: 60 * 60 } }, // Cache for 1 hour
  },
})

This approach allows you to set a specific max-age for your index page Nitro Guide - Caching route rules (https://nitro.unjs.io/guide/cache#caching-route-rules). 3. Using Server Middleware: If you need even more control, you can create a server middleware to set the cache-control header specifically for your index.html:

export default defineEventHandler((event) => {
  setResponseHeaders(event, {
    "cache-control": "public, max-age=3600", // Cache for 1 hour
  });
});

export default defineEventHandler((event) => {
  setResponseHeaders(event, {
    "cache-control": "public, max-age=3600", // Cache for 1 hour
  });
});

This middleware would need to be placed in your server/ directory and would apply to all routes, so you might need to add logic to apply it only to the index route H3 Utils - setResponseHeaders (https://h3.unjs.io/utils/response#setresponseheadersevent-headers). 4. Public Assets Configuration: For other static assets, Nuxt provides a way to set cache-control headers through the publicAssets configuration:

export default defineNuxtConfig({
  nitro: {
    publicAssets: [
      {
        baseURL: "assets",
        dir: "public/assets",
        maxAge: 60 * 60 * 24 * 7, // 7 days
      },
    ],
  }
})

export default defineNuxtConfig({
  nitro: {
    publicAssets: [
      {
        baseURL: "assets",
        dir: "public/assets",
        maxAge: 60 * 60 * 24 * 7, // 7 days
      },
    ],
  }
})

This sets cache-control headers for assets in the specified directory Nitro Config - publicAssets (https://nitro.unjs.io/config#publicassets). As for Nuxt modules specifically designed for this purpose, the knowledge sources don't mention any. The built-in features of Nuxt and Nitro seem to be sufficient for most caching needs. Remember that while these are the recommended ways to set cache-control headers within Nuxt, the final caching behavior can still be affected by your hosting platform's settings. You might need to consult Vercel's documentation or support if their platform is overriding your cache settings for index.html. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

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What's the recommended way to set cache-control for index.html?