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37 lines
1.4 KiB
Markdown
37 lines
1.4 KiB
Markdown
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---
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title: 'useHydration'
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description: 'Allows full control of the hydration cycle to set and receive data from the server.'
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links:
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- label: Source
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icon: i-simple-icons-github
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to: https://github.com/nuxt/nuxt/blob/main/packages/nuxt/src/app/composables/hydrate.ts
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size: xs
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---
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`useHydration` is a built-in composable that provides a way to set data on the server side every time a new HTTP request is made and receive that data on the client side. This way `useHydration` allows you to take full control of the hydration cycle.
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::callout
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This is an advanced composable and is mostly used internally (`useAsyncData`) or by Nuxt modules.
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::
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## Type
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```ts [signature]
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useHydration <T> (key: string, get: () => T, set: (value: T) => void) => {}
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```
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You can use `useHydration()` within composables, plugins and components.
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`useHydration` accepts three parameters:
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- `key`: unique key that identifies the data in your Nuxt application
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- **Type**: `String`
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- `get`: function that returns the value to set the initial data
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- **Type**: `Function`
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- `set`: function that receives the data on the client-side
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- **Type**: `Function`
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Once the initial data is returned using the `get` function on the server side, you can access that data within `nuxtApp.payload` using the unique key that is passed as the first parameter in `useHydration` composable.
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:read-more{to="/docs/getting-started/data-fetching"}
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