# arrayAsync

> This document is the Markdown version of [valibot.dev/api/arrayAsync/](https://valibot.dev/api/arrayAsync/). For the complete documentation index, see [llms.txt](https://valibot.dev/llms.txt).

Creates an array schema.

```ts
const Schema = v.arrayAsync<TItem, TMessage>(item, message);
```

## Generics

- `TItem` `extends BaseSchema<unknown, unknown, BaseIssue<unknown>> | BaseSchemaAsync<unknown, unknown, BaseIssue<unknown>>`
- `TMessage` `extends ErrorMessage<ArrayIssue> | undefined`

## Parameters

- `item` `TItem`
- `message` `TMessage`

### Explanation

With `arrayAsync` you can validate the data type of the input. If the input is not an array, you can use `message` to customize the error message.

> If your array has a fixed length, consider using [`tupleAsync`](/api/tupleAsync.md) for a more precise typing.

## Returns

- `Schema` `ArraySchemaAsync<TItem, TMessage>`

## Examples

The following examples show how `arrayAsync` can be used.

### Stored emails schema

Schema to validate an array of stored emails.

```ts
import { isEmailPresent } from '~/api';

const StoredEmailsSchema = v.arrayAsync(
  v.pipeAsync(
    v.string(),
    v.email(),
    v.checkAsync(isEmailPresent, 'The email is not in the database.')
  )
);
```

## Related

The following APIs can be combined with `arrayAsync`.

### Schemas

[`any`](/api/any.md), [`bigint`](/api/bigint.md), [`blob`](/api/blob.md), [`boolean`](/api/boolean.md), [`custom`](/api/custom.md), [`date`](/api/date.md), [`enum`](/api/enum.md), [`exactOptional`](/api/exactOptional.md), [`file`](/api/file.md), [`function`](/api/function.md), [`instance`](/api/instance.md), [`intersect`](/api/intersect.md), [`lazy`](/api/lazy.md), [`literal`](/api/literal.md), [`looseObject`](/api/looseObject.md), [`looseTuple`](/api/looseTuple.md), [`map`](/api/map.md), [`nan`](/api/nan.md), [`never`](/api/never.md), [`nonNullable`](/api/nonNullable.md), [`nonNullish`](/api/nonNullish.md), [`nonOptional`](/api/nonOptional.md), [`null`](/api/null.md), [`nullable`](/api/nullable.md), [`nullish`](/api/nullish.md), [`number`](/api/number.md), [`object`](/api/object.md), [`objectWithRest`](/api/objectWithRest.md), [`optional`](/api/optional.md), [`picklist`](/api/picklist.md), [`promise`](/api/promise.md), [`record`](/api/record.md), [`set`](/api/set.md), [`strictObject`](/api/strictObject.md), [`strictTuple`](/api/strictTuple.md), [`string`](/api/string.md), [`symbol`](/api/symbol.md), [`tuple`](/api/tuple.md), [`tupleWithRest`](/api/tupleWithRest.md), [`undefined`](/api/undefined.md), [`undefinedable`](/api/undefinedable.md), [`union`](/api/union.md), [`unknown`](/api/unknown.md), [`variant`](/api/variant.md), [`void`](/api/void.md)

### Methods

[`config`](/api/config.md), [`getDefault`](/api/getDefault.md), [`getFallback`](/api/getFallback.md)

### Actions

[`check`](/api/check.md), [`checkItems`](/api/checkItems.md), [`brand`](/api/brand.md), [`description`](/api/description.md), [`empty`](/api/empty.md), [`everyItem`](/api/everyItem.md), [`excludes`](/api/excludes.md), [`filterItems`](/api/filterItems.md), [`findItem`](/api/findItem.md), [`flavor`](/api/flavor.md), [`guard`](/api/guard.md), [`includes`](/api/includes.md), [`length`](/api/length.md), [`mapItems`](/api/mapItems.md), [`maxLength`](/api/maxLength.md), [`metadata`](/api/metadata.md), [`minLength`](/api/minLength.md), [`nonEmpty`](/api/nonEmpty.md), [`notLength`](/api/notLength.md), [`partialCheck`](/api/partialCheck.md), [`rawCheck`](/api/rawCheck.md), [`rawTransform`](/api/rawTransform.md), [`readonly`](/api/readonly.md), [`reduceItems`](/api/reduceItems.md), [`someItem`](/api/someItem.md), [`sortItems`](/api/sortItems.md), [`title`](/api/title.md), [`transform`](/api/transform.md)

### Utils

[`entriesFromList`](/api/entriesFromList.md), [`isOfKind`](/api/isOfKind.md), [`isOfType`](/api/isOfType.md)

### Async

[`checkAsync`](/api/checkAsync.md), [`customAsync`](/api/customAsync.md), [`exactOptionalAsync`](/api/exactOptionalAsync.md), [`fallbackAsync`](/api/fallbackAsync.md), [`getDefaultsAsync`](/api/getDefaultsAsync.md), [`getFallbacksAsync`](/api/getFallbacksAsync.md), [`intersectAsync`](/api/intersectAsync.md), [`lazyAsync`](/api/lazyAsync.md), [`looseObjectAsync`](/api/looseObjectAsync.md), [`looseTupleAsync`](/api/looseTupleAsync.md), [`mapAsync`](/api/mapAsync.md), [`nonNullableAsync`](/api/nonNullableAsync.md), [`nonNullishAsync`](/api/nonNullishAsync.md), [`nonOptionalAsync`](/api/nonOptionalAsync.md), [`nullableAsync`](/api/nullableAsync.md), [`nullishAsync`](/api/nullishAsync.md), [`objectAsync`](/api/objectAsync.md), [`objectWithRestAsync`](/api/objectWithRestAsync.md), [`optionalAsync`](/api/optionalAsync.md), [`parseAsync`](/api/parseAsync.md), [`parserAsync`](/api/parserAsync.md), [`partialCheckAsync`](/api/partialCheckAsync.md), [`pipeAsync`](/api/pipeAsync.md), [`rawCheckAsync`](/api/rawCheckAsync.md), [`rawTransformAsync`](/api/rawTransformAsync.md), [`recordAsync`](/api/recordAsync.md), [`safeParseAsync`](/api/safeParseAsync.md), [`safeParserAsync`](/api/safeParserAsync.md), [`setAsync`](/api/setAsync.md), [`strictObjectAsync`](/api/strictObjectAsync.md), [`strictTupleAsync`](/api/strictTupleAsync.md), [`transformAsync`](/api/transformAsync.md), [`tupleAsync`](/api/tupleAsync.md), [`tupleWithRestAsync`](/api/tupleWithRestAsync.md), [`unionAsync`](/api/unionAsync.md), [`variantAsync`](/api/variantAsync.md)