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44 lines
1.3 KiB
Markdown
44 lines
1.3 KiB
Markdown
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---
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title: useRuntimeHook
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description: Registers a runtime hook in a Nuxt application and ensures it is properly disposed of when the scope is destroyed.
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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/runtime-hook.ts
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size: xs
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---
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::important
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This composable is available in Nuxt v3.14+.
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::
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```ts [signature]
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function useRuntimeHook<THookName extends keyof RuntimeNuxtHooks>(
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name: THookName,
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fn: RuntimeNuxtHooks[THookName] extends HookCallback ? RuntimeNuxtHooks[THookName] : never
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): void
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```
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## Usage
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### Parameters
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- `name`: The name of the runtime hook to register. You can see the full list of [runtime Nuxt hooks here](/docs/api/advanced/hooks#app-hooks-runtime).
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- `fn`: The callback function to execute when the hook is triggered. The function signature varies based on the hook name.
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### Returns
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The composable doesn't return a value, but it automatically unregisters the hook when the component's scope is destroyed.
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## Example
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```vue twoslash [pages/index.vue]
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<script setup lang="ts">
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// Register a hook that runs every time a link is prefetched, but which will be
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// automatically cleaned up (and not called again) when the component is unmounted
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useRuntimeHook('link:prefetch', (link) => {
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console.log('Prefetching', link)
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})
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</script>
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```
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