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37 lines
1.4 KiB
Plaintext
37 lines
1.4 KiB
Plaintext
---
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title: serverComponentsHmrCache
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description: Configure whether fetch responses in Server Components are cached across HMR refresh requests.
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version: experimental
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---
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The experimental `serverComponentsHmrCache` option allows you to cache `fetch` responses in Server Components across Hot Module Replacement (HMR) refreshes in local development. This results in faster responses and reduced costs for billed API calls.
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By default, the HMR cache applies to all `fetch` requests, including those with the `cache: 'no-store'` option. This means uncached requests will not show fresh data between HMR refreshes. However, the cache will be cleared on navigation or full-page reloads.
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You can disable the HMR cache by setting `serverComponentsHmrCache` to `false` in your `next.config.js` file:
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```ts filename="next.config.ts" switcher
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import type { NextConfig } from 'next'
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const nextConfig: NextConfig = {
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experimental: {
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serverComponentsHmrCache: false, // defaults to true
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},
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}
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export default nextConfig
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```
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```js filename="next.config.js" switcher
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/** @type {import('next').NextConfig} */
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const nextConfig = {
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experimental: {
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serverComponentsHmrCache: false, // defaults to true
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},
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}
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module.exports = nextConfig
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```
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> **Good to know:** For better observability, we recommend using the [`logging.fetches`](/docs/app/api-reference/config/next-config-js/logging) option which logs fetch cache hits and misses in the console during development.
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