Nuxt/docs/content/2.app/3.data-fetching.md

Data Fetching

Nuxt provides asyncData to handle data fetching within you application.

asyncData

Within your pages and components you can use asyncData to get access to data that resolves asynchronously.

Usage

asyncData(key: string, fn: () => Object, options?: { defer: boolean, server: boolean })

• key: a unique key to ensure that data fetching can be properly de-duplicated across requests
• fn an asynchronous function that must return an object.
• options:
  • defer: whether to load the route before resolving the async function (defaults to false)
  • server: whether the fetch the data on server-side (defaults to true)

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.

This helper only works with:

• a component defined with defineNuxtComponent
• <script setup nuxt> syntax block

Example

<script setup nuxt>
const { data } = asyncData('time', () => $fetch('/api/count'))
</script>

<template>
  Page visits: {{ data.count }}
</template>

If you don't want to use the <script setup> syntax, you need to use the defineNuxtComponent method to define your component:

<template>
  Page visits: {{ data.count }}
</template>

<script>
export default defineNuxtComponent({
  setup () {
    const { data } = asyncData('time', () => $fetch('/api/count'))
    return { data }
  }
})
</script>