npm package: @stdlib/regexp-filename
Description: Return a regular expression to split a filename.
Author: The Stdlib Authors
Latest version: 0.2.3

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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>

# reFilename

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

> [Regular expression][mdn-regexp] to split a filename.

<section class="installation">

## Installation

```bash
npm install @stdlib/regexp-filename
```

</section>

<section class="usage">

## Usage

```javascript
var reFilename = require( '@stdlib/regexp-filename' );
```

#### reFilename( \[platform] )

Returns a [regular expression][mdn-regexp] to split a filename.

```javascript
var RE = reFilename();
// returns <RegExp>

RE = reFilename( 'posix' );
// returns <RegExp>

var parts = RE.exec( '/foo/bar/index.js' ).slice();
/* returns
    [
        '/foo/bar/index.js',  // input value
        '/',                  // root
        'foo/bar/',           // dirname
        'index.js',           // basename
        '.js'                 // extname
    ]
*/

RE = reFilename( 'win32' );
// returns <RegExp>

parts = RE.exec( 'C:\\foo\\bar\\index.js' ).slice();
/* returns
    [
        'C:\\foo\\bar\\index.js',   // input value
        'C:',                       // device
        '\\',                       // slash
        'foo\\bar\\',               // dirname
        'index.js',                 // basename
        '.js'                       // extname
    ]
*/
```

#### reFilename.REGEXP

[Regular expression][mdn-regexp] to split a filename.

```javascript
var bool = ( reFilename.REGEXP.toString() === reFilename().toString() );
// returns true
```

#### reFilename.REGEXP_POSIX

[Regular expression][@stdlib/regexp/filename-posix] to split a [POSIX][posix] filename.

```javascript
var parts = reFilename.REGEXP_POSIX.exec( '/foo/bar/index.js' ).slice();
/* returns
    [
        '/foo/bar/index.js',  // input value
        '/',                  // root
        'foo/bar/',           // dirname
        'index.js',           // basename
        '.js'                 // extname
    ]
*/
```

#### reFilename.REGEXP_WIN32

[Regular expression][@stdlib/regexp/filename-windows] to split a Windows filename.

```javascript
var parts = reFilename.REGEXP_WIN32.exec( 'C:\\foo\\bar\\index.js' ).slice();
/* returns
    [
        'C:\\foo\\bar\\index.js',   // input value
        'C:',                       // device
        '\\',                       // slash
        'foo\\bar\\',               // dirname
        'index.js',                 // basename
        '.js'                       // extname
    ]
*/
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   The as `REGEXP` exported [regular expression][mdn-regexp] is [platform][@stdlib/assert/is-windows]-dependent. If the current process is running on Windows, `REGEXP === REGEXP_WIN32`; otherwise, `REGEXP === REGEXP_POSIX`.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var reFilename = require( '@stdlib/regexp-filename' );
var RE_FILENAME = reFilename();

// Assuming a POSIX platform...
var parts = RE_FILENAME.exec( '/foo/bar/index.js' ).slice();
/* returns
    [
        '/foo/bar/index.js',
        '/',
        'foo/bar/',
        'index.js',
        '.js'
    ]
*/

parts = reFilename.REGEXP_POSIX.exec( '/foo/bar/home.html' ).slice();
/* returns
    [
        '/foo/bar/home.html',
        '/',
        'foo/bar/',
        'home.html',
        '.html'
    ]
*/

parts = reFilename.REGEXP_WIN32.exec( 'C:\\foo\\bar\\home.html' ).slice();
/* returns
    [
        'C:\\foo\\bar\\home.html',
        'C:',
        '\\',
        'foo\\bar\\',
        'home.html',
        '.html'
    ]
*/
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/regexp-filename-posix`][@stdlib/regexp/filename-posix]</span><span class="delimiter">: </span><span class="description">return a regular expression to split a POSIX filename.</span>
-   <span class="package-name">[`@stdlib/regexp-filename-windows`][@stdlib/regexp/filename-windows]</span><span class="delimiter">: </span><span class="description">return a regular expression to split a Windows filename.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<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>

<!-- /.stdlib -->

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[npm-url]: https://npmjs.org/package/@stdlib/regexp-filename

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

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

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

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

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

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/regexp-filename/main/LICENSE

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

[posix]: https://en.wikipedia.org/wiki/POSIX

[@stdlib/assert/is-windows]: https://www.npmjs.com/package/@stdlib/assert-is-windows

<!-- <related-links> -->

[@stdlib/regexp/filename-posix]: https://www.npmjs.com/package/@stdlib/regexp-filename-posix

[@stdlib/regexp/filename-windows]: https://www.npmjs.com/package/@stdlib/regexp-filename-windows

<!-- </related-links> -->

</section>

<!-- /.links -->