mirror of https://github.com/nuxt/nuxt.git
42 lines
1.3 KiB
Markdown
42 lines
1.3 KiB
Markdown
# Data Fetching
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Nuxt provides `asyncData` to handle data fetching within you application.
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## `asyncData`
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Within your pages and components you can use `asyncData` to get access to data that resolves asynchronously. (This helper only works within a component defined with `defineNuxtComponent`).
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### Usage
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```js
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asyncData(key: string, fn: () => Object, options?: { defer: boolean, server: boolean })
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```
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* **key**: a unique key to ensure that data fetching can be properly de-duplicated across requests
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* **fn** an asynchronous function that must return an object.
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* **options**:
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- _defer_: whether to load the route before resolving the async function (defaults to `false`)
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- _server_: whether the fetch the data on server-side (defaults to `true`)
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Under the hood, `defer: false` uses `<Suspense>` to block the loading of the route before the data has been fetched. Consider using `defer: true` and implementing a loading state instead for a snappier user experience.
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### Example
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```vue
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<template>
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Page visits: {{ data.count }}
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</template>
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<script>
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import { asyncData, defineNuxtComponent } from '@nuxt/app'
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export default defineNuxtComponent({
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setup () {
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const { data } = asyncData('time', () => $fetch('/api/count'))
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return { data }
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}
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})
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</script>
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```
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