Custom Next.js Cache Handler

In Next.js, the default cache handler for the Pages and App Router uses the filesystem cache. This requires no configuration, however, you can customize the cache handler by using the cacheHandler field in next.config.js.

module.exports = {
  cacheHandler: require.resolve('./cache-handler.js'),
  cacheMaxMemorySize: 0, // disable default in-memory caching
}

View an example of a custom cache handler and learn more about implementation.

API Reference

The cache handler can implement the following methods: get, set, and revalidateTag.

get()

Returns the cached value or null if not found.

set()

Returns Promise<void>.

revalidateTag()

Returns Promise<void>. Learn more about revalidating data or the revalidateTag() function.

Good to know:

• revalidatePath is a convenience layer on top of cache tags. Calling revalidatePath will call your revalidateTag function, which you can then choose if you want to tag cache keys based on the path.

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