CacheLife

The cacheLife option allows you to define custom cache profiles when using the cacheLife function inside components or functions, and within the scope of the use cache directive.

Usage

To define a profile, enable the dynamicIO flag and add the cache profile in the cacheLife object in the next.config.js file. For example, a blog profile:

import type { NextConfig } from 'next'
 
const nextConfig: NextConfig = {
  experimental: {
    dynamicIO: true,
    cacheLife: {
      blog: {
        stale: 3600, // 1 hour
        revalidate: 900, // 15 minutes
        expire: 86400, // 1 day
      },
    },
  },
}
 
export default nextConfig

You can now use this custom blog configuration in your component or function as follows:

import { unstable_cacheLife as cacheLife } from 'next/cache'
 
export async function getCachedData() {
  'use cache'
  cacheLife('blog')
  const data = await fetch('/api/data')
  return data
}

Reference

The configuration object has key values with the following format:

Property	Value	Description	Requirement
`stale`	`number`	Duration the client should cache a value without checking the server.	Optional
`revalidate`	`number`	Frequency at which the cache should refresh on the server; stale values may be served while revalidating.	Optional
`expire`	`number`	Maximum duration for which a value can remain stale before switching to dynamic.	Optional - Must be longer than `revalidate`

cacheLife

Usage

Reference

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