This module provides several layers of server-side caching for your Nuxt 3 app:

• SSR component caching (caches rendered markup of a component)
• Route caching (pages, API routes)
• Data Caching (generic cache for anything)
• CDN cache control headers (e.g. Cloudflare, Fastly, Varnish)
• API for cache management
• Cache tag based invalidation

Documentation - NPM

Version 1.x (which is in maintenance mode) supports Nuxt 2.

Does your Nuxt app serve thousands of pages from a CMS? Does it have tens of thousands of requests per day? Does the data change frequently? Does rendering a single page require fetching data from multiple APIs? If you've answered any of these questions with "yes", then this module might be for you.

I work fulltime on building frontends with Nuxt for large CMS sites. Rendering a single page might require up to 10 API calls to get all the data: Menu, footer, translations, route, page data, user state, additional data... It all adds up and doing that for every request can quickly become a bottleneck. Maybe you can work around this problem by getting all the data in a single API call, but I didn't like to have components dependent on global state.

Instead my solution was to cache the API responses locally on the server. Either for a fixed amount of time, like 5 minutes, or until the cache entry is being invalidated. In addition, I cache components that appear on most pages, like menu or footer.

The hardest thing in IT is cache invalidation, so I also added a way to invalidate cache entries by key or using cache tags.

Use the <RenderCacheable> wrapper component to cache the markup of the default slot:

<template>
  <div>
    <RenderCacheable cache-key="navbar_de" :max-age="3600">
      <Navbar />
    </RenderCacheable>
  </div>
</template>

The component is only rendered once and its markup cached. Afterwards the markup is directly returned.

Cache rendered pages or custom API responses:

<script lang="ts" setup>
useRouteCache((route) => {
  // Mark the page as cacheable for 1 hour and add a cache tag.
  route.setCacheable().setMaxAge(3600).addTags(['page:2'])
})
</script>

Manage the cacheability for the current response. This will set the correct cache control and cache tags headers for Cloudflare, Fastly and other cache providers:

<script lang="ts" setup>
useCDNHeaders((helper) => {
  helper
    .public()
    .setNumeric('maxAge', 3600)
    .setNumeric('staleWhileRevalidate', 21600)
    .set('mustRevalidate', true)
    .addTags(['page:2', 'image:342'])
})
</script>

The state is managed inside the current request and can be changed for the entire duration of the request. The headers are generated right before the response is sent.

The optional API provides endpoints to manage the caches.