npm package: @stdlib/string-base-for-each-grapheme-cluster
Description: Invoke a function for each grapheme cluster (i.e., user-perceived character) in a string.
Author: The Stdlib Authors
Latest version: 0.2.3

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# forEachGraphemeCluster

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

> Invokes a function for each grapheme cluster (i.e., user-perceived character) in a string.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/string-base-for-each-grapheme-cluster
```

</section>

<section class="usage">

## Usage

```javascript
var forEachGraphemeCluster = require( '@stdlib/string-base-for-each-grapheme-cluster' );
```

#### forEachGraphemeCluster( str, clbk\[, thisArg ] )

Invokes a function for each grapheme cluster (i.e., user-perceived character) in a string.

```javascript
function log( value, index ) {
    console.log( '%d: %s', index, value );
}

forEachGraphemeCluster( 'Beep!', log );
/* =>
    0: B
    1: e
    2: e
    3: p
    4: !
*/
```

The invoked function is provided three arguments:

-   **value**: grapheme cluster.
-   **index**: starting grapheme cluster index.
-   **str**: input string.

To set the function execution context, provide a `thisArg`.

```javascript
function clbk() {
    this.count += 1;
}

var str = '👉🏿';

var ctx = {
    'count': 0
};

forEachGraphemeCluster( str, clbk, ctx );

var cnt = ctx.count;
// returns 1
```

</section>

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</section>

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<section class="examples">

## Examples

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

```javascript
var forEachGraphemeCluster = require( '@stdlib/string-base-for-each-grapheme-cluster' );

function log( value, index ) {
    console.log( '%d: %s', index, value );
}

forEachGraphemeCluster( 'presidential election', log );
forEachGraphemeCluster( 'Iñtërnâtiônàlizætiøn', log );
forEachGraphemeCluster( '🌷🍕', log );
forEachGraphemeCluster( '\uD834\uDD1E', log );
```

</section>

<!-- /.examples -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/string-base/for-each`][@stdlib/string/base/for-each]</span><span class="delimiter">: </span><span class="description">invoke a function for each UTF-16 code unit in a string.</span>
-   <span class="package-name">[`@stdlib/string-base/for-each-code-point`][@stdlib/string/base/for-each-code-point]</span><span class="delimiter">: </span><span class="description">invoke a function for each Unicode code point in a string.</span>
-   <span class="package-name">[`@stdlib/string-for-each`][@stdlib/string/for-each]</span><span class="delimiter">: </span><span class="description">invoke a function for each character in a string.</span>

</section>

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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

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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