feat(nuxt): return status from useAsyncData (#21045)

docs/3.api/1.composables/use-async-data.md

@@ -38,11 +38,14 @@ type AsyncData<DataT, ErrorT> = {
   refresh: (opts?: AsyncDataExecuteOptions) => Promise<void>
   execute: (opts?: AsyncDataExecuteOptions) => Promise<void>
   error: Ref<ErrorT | null>
+  status: Ref<AsyncDataRequestStatus>
 };
 
 interface AsyncDataExecuteOptions {
   dedupe?: boolean
 }
+
+type AsyncDataRequestStatus = 'idle' | 'pending' | 'success' | 'error'
 ```
 
 ## Params
@@ -66,6 +69,7 @@ Under the hood, `lazy: false` uses `<Suspense>` to block the loading of the rout
 * **pending**: a boolean indicating whether the data is still being fetched
 * **refresh**/**execute**: a function that can be used to refresh the data returned by the `handler` function
 * **error**: an error object if the data fetching failed
+* **status**: a string indicating the status of the data request (`"idle"`, `"pending"`, `"success"`, `"error"`)
 
 By default, Nuxt waits until a `refresh` is finished before it can be executed again.
 

packages/nuxt/src/app/composables/asyncData.ts

@@ -5,6 +5,8 @@ import { useNuxtApp } from '../nuxt'
 import { createError } from './error'
 import { onNuxtReady } from './ready'
 
+export type AsyncDataRequestStatus = 'idle' | 'pending' | 'success' | 'error'
+
 export type _Transform<Input = any, Output = any> = (input: Input) => Output
 
 export type PickFrom<T, K extends Array<string>> = T extends Array<any>
@@ -60,6 +62,7 @@ export interface _AsyncData<DataT, ErrorT> {
   refresh: (opts?: AsyncDataExecuteOptions) => Promise<void>
   execute: (opts?: AsyncDataExecuteOptions) => Promise<void>
   error: Ref<ErrorT | null>
+  status: Ref<AsyncDataRequestStatus>
 }
 
 export type AsyncData<Data, Error> = _AsyncData<Data, Error> & Promise<_AsyncData<Data, Error>>
@@ -125,7 +128,8 @@ export function useAsyncData<
     nuxt._asyncData[key] = {
       data: ref(getCachedData() ?? options.default!()),
       pending: ref(!hasCachedData()),
-      error: toRef(nuxt.payload._errors, key)
+      error: toRef(nuxt.payload._errors, key),
+      status: ref('idle')
     }
   }
   // TODO: Else, somehow check for conflicting keys with different defaults or fetcher
@@ -144,6 +148,7 @@ export function useAsyncData<
       return getCachedData()
     }
     asyncData.pending.value = true
+    asyncData.status.value = 'pending'
     // TODO: Cancel previous promise
     const promise = new Promise<ResT>(
       (resolve, reject) => {
@@ -166,6 +171,7 @@ export function useAsyncData<
         }
         asyncData.data.value = result
         asyncData.error.value = null
+        asyncData.status.value = 'success'
       })
       .catch((error: any) => {
         // If this request is cancelled, resolve to the latest request.
@@ -173,6 +179,7 @@ export function useAsyncData<
 
         asyncData.error.value = error
         asyncData.data.value = unref(options.default!())
+        asyncData.status.value = 'error'
       })
       .finally(() => {
         if ((promise as any).cancelled) { return }
@@ -222,6 +229,7 @@ export function useAsyncData<
     if (fetchOnServer && nuxt.isHydrating && hasCachedData()) {
       // 1. Hydration (server: true): no fetch
       asyncData.pending.value = false
+      asyncData.status.value = asyncData.error.value ? 'error' : 'success'
     } else if (instance && ((nuxt.payload.serverRendered && nuxt.isHydrating) || options.lazy) && options.immediate) {
       // 2. Initial load (server: false): fetch on mounted
       // 3. Initial load or navigation (lazy: true): fetch on mounted
@@ -328,6 +336,7 @@ export function clearNuxtData (keys?: string | string[] | ((key: string) => bool
       nuxtApp._asyncData[key]!.data.value = undefined
       nuxtApp._asyncData[key]!.error.value = undefined
       nuxtApp._asyncData[key]!.pending.value = false
+      nuxtApp._asyncData[key]!.status.value = 'idle'
     }
     if (key in nuxtApp._asyncDataPromises) {
       nuxtApp._asyncDataPromises[key] = undefined

packages/nuxt/src/app/nuxt.ts

@@ -14,6 +14,7 @@ import type { RenderResponse } from 'nitropack'
 import type { NuxtIslandContext } from '../core/runtime/nitro/renderer'
 import type { RouteMiddleware } from '../../app'
 import type { NuxtError } from '../app/composables/error'
+import type { AsyncDataRequestStatus } from '../app/composables/asyncData'
 
 const nuxtAppCtx = /* #__PURE__ */ getContext<NuxtApp>('nuxt-app')
 
@@ -87,6 +88,7 @@ interface _NuxtApp {
     data: Ref<any>
     pending: Ref<boolean>
     error: Ref<any>
+    status: Ref<AsyncDataRequestStatus>
   } | undefined>
 
   /** @internal */

test/basic.test.ts

@@ -1562,6 +1562,19 @@ describe.skipIf(isWindows)('useAsyncData', () => {
   it('two requests made at once resolve and sync', async () => {
     await expectNoClientErrors('/useAsyncData/promise-all')
   })
+
+  it('requests status can be used', async () => {
+    const html = await $fetch('/useAsyncData/status')
+    expect(html).toContain('true')
+    expect(html).not.toContain('false')
+
+    const page = await createPage('/useAsyncData/status')
+    await page.waitForLoadState('networkidle')
+
+    expect(await page.locator('#status5-values').textContent()).toContain('idle,pending,success')
+
+    await page.close()
+  })
 })
 
 describe.runIf(isDev())('component testing', () => {

test/fixtures/basic/pages/useAsyncData/status.vue

@@ -0,0 +1,49 @@
+<script setup lang="ts">
+const { status: status1 } = await useAsyncData(() => Promise.resolve(true))
+if (status1.value !== 'success') {
+  throw new Error('status1 should be "success"')
+}
+
+const { status: status2 } = await useAsyncData(() => Promise.reject(Error('boom!')))
+if (status2.value !== 'error') {
+  throw new Error('status2 should be "error"')
+}
+
+const { status: status3 } = await useAsyncData(() => Promise.resolve(true), { immediate: false })
+if (status3.value !== 'idle') {
+  throw new Error('status3 should be "idle"')
+}
+
+const { status: status4, execute } = await useAsyncData(() => Promise.resolve(true), { immediate: false })
+await execute()
+if (status4.value !== 'success') {
+  throw new Error('status4 should be "success"')
+}
+
+const { status: status5 } = await useAsyncData(() => Promise.resolve(true), { server: false })
+if (process.server && status5.value !== 'idle') {
+  throw new Error('status5 should be "idle" server side')
+}
+
+const status5Values = ref<string[]>([])
+watchEffect(() => {
+  status5Values.value.push(status5.value)
+})
+</script>
+
+<template>
+  <div>
+    Status
+    <div>
+      {{ status1 === 'success' }}
+      {{ status2 === 'error' }}
+      {{ status3 === 'idle' }}
+      {{ status4 === 'success' }}
+      <ClientOnly>
+        <div id="status5-values">
+          {{ status5Values.join(',') }}
+        </div>
+      </ClientOnly>
+    </div>
+  </div>
+</template>