# everyItem

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

Creates an every item validation action.

```ts
const Action = v.everyItem<TInput, TMessage>(requirement, message);
```

## Generics

- `TInput` `extends ArrayInput`
- `TMessage` `extends ErrorMessage<EveryItemIssue<TInput>> | undefined`

## Parameters

- `requirement` `ArrayRequirement<TInput>`
- `message` `TMessage`

### Explanation

With `everyItem` you can freely validate the items of an array and return `true` if they are valid or `false` otherwise. If not every item matches your `requirement`, you can use `message` to customize the error message.

## Returns

- `Action` `EveryItemAction<TInput, TMessage>`

## Examples

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

### Sorted array schema

Schema to validate that an array is sorted.

```ts
const SortedArraySchema = v.pipe(
  v.array(v.number()),
  v.everyItem(
    (item, index, array) => index === 0 || item >= array[index - 1],
    'The numbers must be sorted in ascending order.'
  )
);
```

## Related

The following APIs can be combined with `everyItem`.

### Schemas

[`any`](/api/any.md), [`array`](/api/array.md), [`custom`](/api/custom.md), [`instance`](/api/instance.md), [`tuple`](/api/tuple.md), [`unknown`](/api/unknown.md)

### Methods

[`pipe`](/api/pipe.md)

### Utils

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