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

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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="cli">



<section class="installation">

## Installation

To use as a general utility, install the CLI package globally

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

</section>
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<section class="usage">

## Usage

```text
Usage: truncate-middle [options] [<string>] --len <length>

Options:

  -h,    --help                Print this message.
  -V,    --version             Print the package version.
         --len length          String length.
         --seq str             Custom replacement sequence. Default: '...'.
         --split sep           Delimiter for stdin data. Default: '/\\r?\\n/'.
```

</section>

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<section class="notes">

## Notes

-   If the split separator is a [regular expression][mdn-regexp], ensure that the `split` option is either properly escaped or enclosed in quotes.

    ```bash
    # Not escaped...
    $ echo -n $'Hello, World!\nBeep Boop Baz' | truncate-middle --len 6 --split /\r?\n/

    # Escaped...
    $ echo -n $'Hello, World!\nBeep Boop Baz' | truncate-middle --len 6 --split /\\r?\\n/
    ```

-   The implementation ignores trailing delimiters.

</section>

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<section class="examples">

## Examples

```bash
$ truncate-middle 'Hello, World!' --len 8
Hel...d!

$ truncate-middle 'Hello, World!' --len 6 --seq '!'
Hel|d!
```

To use as a [standard stream][standard-streams],

```bash
$ echo -n 'Hello, World!' | truncate-middle --len 8
Hel...d!
```

By default, when used as a [standard stream][standard-streams], the implementation assumes newline-delimited data. To specify an alternative delimiter, set the `split` option.

```bash
$ echo -n 'Hello, World!\tBeep Boop' | truncate-middle --split '\t' --len 6 --seq '!'
Hel|d!
Bee|op
```

</section>

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</section>

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<section class="related">

## See Also

-   <span class="package-name">[`@stdlib/string-truncate-middle`][@stdlib/string-truncate-middle]</span><span class="delimiter">: </span><span class="description">truncate a string in the middle to a specified length.</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].

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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-truncate-middle/tree/deno
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[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
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[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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