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Closes: https://linear.app/vercel/issue/DOC-6221/nextjs-split-route-segments-files-in-preparation-for-instant
23 lines
1021 B
Plaintext
23 lines
1021 B
Plaintext
---
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title: dynamicParams
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description: API reference for the dynamicParams route segment config option.
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---
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The `dynamicParams` option allows you to control what happens when a dynamic segment is visited that was not generated with [generateStaticParams](/docs/app/api-reference/functions/generate-static-params).
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```tsx filename="layout.tsx | page.tsx" switcher
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export const dynamicParams = true // true | false
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```
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```js filename="layout.js | page.js | route.js" switcher
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export const dynamicParams = true // true | false
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```
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- **`true`** (default): Dynamic route segments not included in `generateStaticParams` are generated at request time.
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- **`false`**: Dynamic route segments not included in `generateStaticParams` will return a 404.
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> **Good to know**:
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>
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> - This option replaces the `fallback: true | false | blocking` option of `getStaticPaths` in the `pages` directory.
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> - `dynamicParams` is not available when [Cache Components](/docs/app/api-reference/config/next-config-js/cacheComponents) is enabled.
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