N
Nuxt•3w ago
salomon_.

await useAsyncData vs useAsyncData

Whats the difference await useAsyncData vs useAsyncData?
2 Replies
kapa.ai
kapa.ai•3w ago
Hi @salomon_.. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The main difference between await useAsyncData and useAsyncData (without await) is when the data becomes available in your component. When you use await useAsyncData: - The data is immediately available in your script setup - The component waits for the data to be resolved before continuing execution - You can directly use the returned data in your script logic 
// With await
const { data, error } = await useAsyncData('key', () => $fetch('/api/data'))
// data.value is immediately available here for further processing
// With await
const { data, error } = await useAsyncData('key', () => $fetch('/api/data'))
// data.value is immediately available here for further processing
When you use useAsyncData without await: - The data will not be available immediately in your script setup - The component continues execution without waiting for the data - The data will still be "waited on" during SSR and be available in your template - You can use watchers to react to the data when it becomes available 
// Without await
const { data, error } = useAsyncData('key', () => $fetch('/api/data'))
// data.value might be null here initially

// You can watch for changes
watch(data, (newData) => {
  // This runs when data becomes available
})
// Without await
const { data, error } = useAsyncData('key', () => $fetch('/api/data'))
// data.value might be null here initially

// You can watch for changes
watch(data, (newData) => {
  // This runs when data becomes available
})
As noted by a Nuxt team member in a GitHub issue: "When not awaiting useAsyncData, the data will still be 'waited on' during SSR but is not available in the <script> part due to being fetched via onServerPrefetch. This way, the template can still render though." Github Issue #31031 If you need the results in your <script setup> for further processing, using await is the correct approach. If you only need to display the data in your template, you can use either approach. Both approaches benefit from Nuxt's built-in features like: - Automatic deduplication of requests - Adding responses to the Nuxt payload - Avoiding re-fetching data on client-side when the page hydrates Data Fetching Documentation ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.ai•3w ago
<@1029431292170874910> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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