What is the correct way to handle the return value of an useAsyncData function in Nuxt 3?

How can I display the retrieved 'data' from a useAsyncData function that fetches information from a pinia store?

<script setup lang="ts">
import { useSale } from "~/stores/sale";

const saleStore = useSale();

const { data: vehicle, pending } = useAsyncData<{ data: IVehicle }>(
  "vehicle",
  () => saleStore.getVehicle
);
</script>

Currently, I am encountering an error in vscode:

No overload matches this call.
  Overload 1 of 2, '(handler: (ctx?: NuxtApp) => Promise<{ data: IVehicle; }>, options?: AsyncDataOptions<{ data: IVehicle; }, { data: IVehicle; }, KeysOf<{ data: IVehicle; }>>): AsyncData<...>', gave the following error.
  Overload 2 of 2, '(key: string, handler: (ctx?: NuxtApp) => Promise<{ data: IVehicle; }>, options?: AsyncDataOptions<{ data: IVehicle; }, { data: IVehicle; }, KeysOf<{ data: IVehicle; }>>): AsyncData<...>', gave the following error.ts(2769)
asyncData.d.ts(35, 143): The expected type comes from the return type of this signature.

Update

I attempted to specify a type as mentioned in the comments:

const { data: vehicle, pending } = await useAsyncData<IVehicle>(
  "vehicle",
  () => saleStore.vehicle
);

However, the error persists:

No overload matches this call.
  Overload 1 of 2, '(handler: (ctx?: NuxtApp) => Promise<IVehicle>, options?: AsyncDataOptions<IVehicle, IVehicle, KeysOf<IVehicle>>): AsyncData<...>', gave the following error.
  Overload 2 of 2, '(key: string, handler: (ctx?: NuxtApp) => Promise<IVehicle>, options?: AsyncDataOptions<IVehicle, IVehicle, KeysOf<IVehicle>>): AsyncData<...>', gave the following error.ts(2769)
asyncData.d.ts(35, 143): The expected type comes from the return type of this signature.

Answer №1

When defining the asyncData type, make sure to check out https://nuxt.com/docs/api/composables/use-async-data#type

To specify the return data type correctly, use useAsyncData<IVehicle> instead of

useAsyncData<{ data: IVehicle }>

const { data: vehicle, pending } = useAsyncData<IVehicle>(
  "vehicle",
  () => saleStore.getVehicle
);

Answer №2

Dealing with a similar issue in my specific use case involving useAsyncData(), I found a solution while working with an async promise Composable in (Nuxt3).

The key insight came from this informative article: https://blog.logrocket.com/async-await-in-typescript/

The strategy appears to be abandoning the typing of useAsyncData() and focusing on typing the return value within useAsyncData(). Here's how it could be implemented:

YourComponent.vue

// Changing this line to the default syntax
const { data: vehicle, pending } = useAsyncData(
  "vehicle",
  () => saleStore.getVehicle
);

Sale.js

const useSale = async (): Promise<IVehicle> => {

  // Implementation logic goes here

}

This method resolved my issue, although I am not entirely certain if this exact syntax aligns perfectly with your store setup. It may require some experimentation to pinpoint the suitable location within getVehicle. If you encounter difficulties, feel free to share snippets of your store code for further assistance.

Answer №3

After encountering a similar problem, I found that including types in the handler() function resolved it successfully.

const { data: car, pending } = await useAsyncData(
  "car",
  (): Promise<ICar> => saleStore.car
);

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