npm package: @stdlib/string-truncate-middle
Description: Truncate a string in the middle to a specified length.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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  <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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# truncateMiddle

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

> Truncate a string in the middle to a specified length.

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</section>

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<section class="installation">

## Installation

```bash
npm install @stdlib/string-truncate-middle
```

</section>

<section class="usage">

## Usage

```javascript
var truncateMiddle = require( '@stdlib/string-truncate-middle' );
```

#### truncate( str, len\[, seq] )

Truncates a string in the middle to a specified length.

```javascript
var out = truncateMiddle( 'beep boop', 7 );
// returns 'be...op'
```

By default, the truncated string uses the replacement sequence `'...'`. To customize the replacement sequence, provide a `seq` argument:

```javascript
var out = truncateMiddle( 'beep boop', 7, '!' );
// returns 'bee!oop'

out = truncateMiddle( 'beep boop', 7, '!!!' );
// returns 'be!!!op'
```

</section>

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<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var truncateMiddle = require( '@stdlib/string-truncate-middle' );

var str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.';
var out = truncateMiddle( str, 15 );
// returns 'Lorem ... elit.'

str = 'To be or not to be, that is the question';
out = truncateMiddle( str, 19, '|' );
// returns 'To be or | question'

str = 'The quick fox jumps over the lazy dog.';
out = truncateMiddle( str, 28, '...' );
// returns 'The quick fox...he lazy dog.'

str = '🐺 Wolf Brothers 🐺';
out = truncateMiddle( str, 7 );
// returns '🐺 ... 🐺'

str = '🐺 Wolf Pack 🐺';
out = truncateMiddle( str, 7, '🐺🐺🐺' );
// returns '🐺 🐺🐺🐺 🐺'
```

</section>

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<!-- Section for describing a command-line interface. -->



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<section class="related">

## See Also

-   <span class="package-name">[`@stdlib/string-truncate-middle-cli`][@stdlib/string-truncate-middle-cli]</span><span class="delimiter">: </span><span class="description">CLI package for use as a command-line utility.</span>
-   <span class="package-name">[`@stdlib/string-truncate`][@stdlib/string/truncate]</span><span class="delimiter">: </span><span class="description">truncate a string to a specified length.</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

[![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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[@stdlib/string-truncate-middle-cli]: https://www.npmjs.com/package/@stdlib/string-truncate-middle-cli

[npm-image]: http://img.shields.io/npm/v/@stdlib/string-truncate-middle.svg
[npm-url]: https://npmjs.org/package/@stdlib/string-truncate-middle

[test-image]: https://github.com/stdlib-js/string-truncate-middle/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/string-truncate-middle/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/string-truncate-middle/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/string-truncate-middle?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

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[cli-section]: https://github.com/stdlib-js/string-truncate-middle#cli
[cli-url]: https://github.com/stdlib-js/string-truncate-middle/tree/cli
[@stdlib/string-truncate-middle]: https://github.com/stdlib-js/string-truncate-middle/tree/main

[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-truncate-middle/tree/deno
[deno-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/string-truncate-middle/tree/umd
[umd-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/string-truncate-middle/tree/esm
[esm-readme]: https://github.com/stdlib-js/string-truncate-middle/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/string-truncate-middle/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/string-truncate-middle/main/LICENSE

[standard-streams]: https://en.wikipedia.org/wiki/Standard_streams

[mdn-regexp]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

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[@stdlib/string/truncate]: https://www.npmjs.com/package/@stdlib/string-truncate

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