npm package: @stdlib/regexp-to-json
Description: Return a JSON representation of a regular expression.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
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# regexp2json

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

> Return a [JSON][json] representation of a [regular expression][mdn-regexp].

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/regexp-to-json
```

</section>

<section class="usage">

## Usage

```javascript
var regexp2json = require( '@stdlib/regexp-to-json' );
```

#### regexp2json( regexp )

Returns a [JSON][json] representation of a [regular expression][mdn-regexp].

```javascript
var json = regexp2json( /ab+c/ );
/* returns
    {
        'type': 'RegExp',
        'pattern': 'ab+c',
        'flags': ''
    }
*/
```

The returned object has the following properties:

-   **type**: value type. The assigned value is always `'RegExp'`.
-   **pattern**: regular expression pattern.
-   **flags**: regular expression flags.

</section>

<!-- /.usage -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var regexp2json = require( '@stdlib/regexp-to-json' );

var out = regexp2json( /.*/ );
/* returns
    {
        'type': 'RegExp',
        'pattern': '.*',
        'flags': ''
    }
*/

out = regexp2json( /ab+c/g );
/* returns
    {
        'type': 'RegExp',
        'pattern': 'ab+c',
        'flags': 'g'
    }
*/
```

</section>

<!-- /.examples -->

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<section class="references">

</section>

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<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/regexp-reviver`][@stdlib/regexp/reviver]</span><span class="delimiter">: </span><span class="description">revive a JSON-serialized regular expression.</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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[npm-image]: http://img.shields.io/npm/v/@stdlib/regexp-to-json.svg
[npm-url]: https://npmjs.org/package/@stdlib/regexp-to-json

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

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/regexp-to-json/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/regexp-to-json?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-to-json/tree/deno
[deno-readme]: https://github.com/stdlib-js/regexp-to-json/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/regexp-to-json/tree/umd
[umd-readme]: https://github.com/stdlib-js/regexp-to-json/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/regexp-to-json/tree/esm
[esm-readme]: https://github.com/stdlib-js/regexp-to-json/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/regexp-to-json/blob/main/branches.md

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

[json]: http://www.json.org/

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

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

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

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</section>

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