npm package: @stdlib/string-tools-grapheme-cluster-break
Description: Grapheme cluster break tooling.
Author: The Stdlib Authors
Latest version: 0.2.4

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<details>
  <summary>
    About stdlib...
  </summary>
  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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</details>

# grapheme

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Grapheme cluster break tooling.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/string-tools-grapheme-cluster-break
```

</section>

<section class="usage">

## Usage

```javascript
var grapheme = require( '@stdlib/string-tools-grapheme-cluster-break' );
```

#### grapheme

A collection of functions for performing grapheme cluster break operations.

* * *

### Methods

#### grapheme.breakProperty( code )

Returns the grapheme break property from the [Unicode Standard][unicode-grapheme-break-property].

```javascript
var out = grapheme.breakProperty( 0x008f );
// returns 2

out = grapheme.breakProperty( 0x111C2 );
// returns 12

out = grapheme.breakProperty( 0x1F3FC );
// returns 3
```

#### grapheme.emojiProperty( code )

Returns the emoji property from the [Unicode Standard][unicode-emoji-property].

```javascript
var out = grapheme.emojiProperty( 0x23EC );
// returns 101

out = grapheme.emojiProperty( 0x1FFFE );
// returns 11
```

#### grapheme.breakType( breaks, emoji )

Returns the break type between grapheme breaking classes according to _UAX #29 3.1.1 Grapheme Cluster Boundary Rules_ on extended grapheme clusters.

```javascript
var out = grapheme.breakType( [ 11, 3, 11 ], [ 11, 11, 11 ] );
// returns 1
```

* * *

### Properties

#### grapheme.constants

An object mapping break type names to integer values.

```javascript
var out = grapheme.constants;
// returns {...}
```

</section>

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<section class="notes">

</section>

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<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var grapheme = require( '@stdlib/string-tools-grapheme-cluster-break' );

var out = grapheme.breakProperty( 0x008f );
// returns 2

out = grapheme.emojiProperty( 0x23EC );
// returns 101

out = grapheme.breakType( [ 11, 3, 11 ], [ 11, 11, 11 ] );
// returns 1

out = grapheme.constants;
// returns {...}
```

</section>

<!-- /.examples -->

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<section class="main-repo" >

* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

</section>

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[npm-image]: http://img.shields.io/npm/v/@stdlib/string-tools-grapheme-cluster-break.svg
[npm-url]: https://npmjs.org/package/@stdlib/string-tools-grapheme-cluster-break

[test-image]: https://github.com/stdlib-js/string-tools-grapheme-cluster-break/actions/workflows/test.yml/badge.svg?branch=v0.2.4
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[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/string-tools-grapheme-cluster-break/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/string-tools-grapheme-cluster-break?branch=main

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/string-tools-grapheme-cluster-break/tree/deno
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-tools-grapheme-cluster-break/main/LICENSE

[unicode-grapheme-break-property]: https://www.unicode.org/Public/13.0.0/ucd/auxiliary/GraphemeBreakProperty.txt

[unicode-emoji-property]: https://www.unicode.org/Public/13.0.0/ucd/emoji/emoji-data.txt

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