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- CLAUDE.md 운영 규칙 - wiki/ 정리된 지식 페이지 (Nuxt + Claude Code) - raw/ 원본 자료 - reference/ Nuxt 4.x 공식 문서 Co-authored-by: Cursor <cursoragent@cursor.com>
97 lines
2.9 KiB
Markdown
97 lines
2.9 KiB
Markdown
---
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title: useLazyAsyncData
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description: This wrapper around useAsyncData triggers navigation immediately.
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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/asyncData.ts
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size: xs
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---
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`useLazyAsyncData` provides a wrapper around [`useAsyncData`](/docs/4.x/api/composables/use-async-data) that triggers navigation before the handler is resolved by setting the `lazy` option to `true`.
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::note
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By default, [`useAsyncData`](/docs/4.x/api/composables/use-async-data) blocks navigation until its async handler is resolved. `useLazyAsyncData` allows navigation to occur immediately while data fetching continues in the background.
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::
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## Usage
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```vue [app/pages/index.vue]
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<script setup lang="ts">
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const { status, data: posts } = await useLazyAsyncData('posts', () => $fetch('/api/posts'))
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</script>
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<template>
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<div>
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<div v-if="status === 'pending'">
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Loading...
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</div>
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<div v-else-if="status === 'error'">
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Error loading posts
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</div>
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<div v-else>
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{{ posts }}
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</div>
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</div>
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</template>
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```
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When using `useLazyAsyncData`, navigation will occur before fetching is complete. This means you must handle `pending` and `error` states directly within your component's template.
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::warning
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`useLazyAsyncData` is a reserved function name transformed by the compiler, so you should not name your own function `useLazyAsyncData`.
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::
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## Type
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```ts [Signature]
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export function useLazyAsyncData<DataT, ErrorT> (
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handler: (ctx?: NuxtApp) => Promise<DataT>,
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options?: AsyncDataOptions<DataT>,
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): AsyncData<DataT, ErrorT>
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export function useLazyAsyncData<DataT, ErrorT> (
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key: string,
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handler: (ctx?: NuxtApp) => Promise<DataT>,
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options?: AsyncDataOptions<DataT>,
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): AsyncData<DataT, ErrorT>
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```
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`useLazyAsyncData` has the same signature as [`useAsyncData`](/docs/4.x/api/composables/use-async-data).
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## Parameters
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`useLazyAsyncData` accepts the same parameters as [`useAsyncData`](/docs/4.x/api/composables/use-async-data), with the `lazy` option automatically set to `true`.
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:read-more{to="/docs/4.x/api/composables/use-async-data#parameters"}
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## Return Values
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`useLazyAsyncData` returns the same values as [`useAsyncData`](/docs/4.x/api/composables/use-async-data).
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:read-more{to="/docs/4.x/api/composables/use-async-data#return-values"}
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## Example
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```vue [app/pages/index.vue]
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<script setup lang="ts">
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/* Navigation will occur before fetching is complete.
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Handle 'pending' and 'error' states directly within your component's template
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*/
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const { status, data: count } = await useLazyAsyncData('count', () => $fetch('/api/count'))
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watch(count, (newCount) => {
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// Because count might start out null, you won't have access
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// to its contents immediately, but you can watch it.
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})
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</script>
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<template>
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<div>
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{{ status === 'pending' ? 'Loading' : count }}
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</div>
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</template>
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```
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:read-more{to="/docs/4.x/getting-started/data-fetching"}
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