# graphemes

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

Creates a [graphemes](https://en.wikipedia.org/wiki/Grapheme) validation action.

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

## Generics

- `TInput` `extends string`
- `TRequirement` `extends number`
- `TMessage` `extends ErrorMessage<GraphemesIssue<TInput, TRequirement>> | undefined`

## Parameters

- `requirement` `TRequirement`
- `message` `TMessage`

### Explanation

With `graphemes` you can validate the graphemes of a string. If the input does not match the `requirement`, you can use `message` to customize the error message.

> If you are looking for an equivalent of JavaScript's `.length`, use [`length`](/api/length.md) instead. If you need to count each Unicode code point as a single character (a supplementary code point occupies two UTF-16 code units in JavaScript), use [`codePoints`](/api/codePoints.md) instead.

## Returns

- `Action` `GraphemesAction<TInput, TRequirement, TMessage>`

## Examples

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

### Graphemes schema

Schema to validate a string with 8 graphemes.

```ts
const GraphemesSchema = v.pipe(
  v.string(),
  v.graphemes(8, 'Exactly 8 graphemes are required.')
);
```

## Related

The following APIs can be combined with `graphemes`.

### Schemas

[`any`](/api/any.md), [`custom`](/api/custom.md), [`string`](/api/string.md)

### Methods

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

### Actions

[`codePoints`](/api/codePoints.md), [`length`](/api/length.md)

### Utils

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