https://github.com/inspect-js/is-regex

Is this value a JS regex?
https://github.com/inspect-js/is-regex

is javascript js-regex regex regexp

Last synced: about 7 hours ago
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Is this value a JS regex?

• Host: GitHub
• URL: https://github.com/inspect-js/is-regex
• Owner: inspect-js
• License: mit
• Created: 2014-01-15T09:04:39.000Z (about 11 years ago)
• Default Branch: main
• Last Pushed: 2024-12-12T05:44:05.000Z (about 2 months ago)
• Last Synced: 2025-01-19T21:06:24.632Z (7 days ago)
• Topics: is, javascript, js-regex, regex, regexp
• Language: JavaScript
• Homepage:
• Size: 202 KB
• Stars: 24
• Watchers: 5
• Forks: 11
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# is-regex [![Version Badge][2]][1]

[![github actions][actions-image]][actions-url]

[![coverage][codecov-image]][codecov-url]

[![dependency status][5]][6]

[![dev dependency status][7]][8]

[![License][license-image]][license-url]

[![Downloads][downloads-image]][downloads-url]

[![npm badge][11]][1]

Is this value a JS regex?

This module works cross-realm/iframe, and despite ES6 @@toStringTag.

## Example

```js

var isRegex = require('is-regex');

var assert = require('assert');

assert.notOk(isRegex(undefined));

assert.notOk(isRegex(null));

assert.notOk(isRegex(false));

assert.notOk(isRegex(true));

assert.notOk(isRegex(42));

assert.notOk(isRegex('foo'));

assert.notOk(isRegex(function () {}));

assert.notOk(isRegex([]));

assert.notOk(isRegex({}));

assert.ok(isRegex(/a/g));

assert.ok(isRegex(new RegExp('a', 'g')));

```

## Tests

Simply clone the repo, `npm install`, and run `npm test`

[1]: https://npmjs.org/package/is-regex

[2]: https://versionbadg.es/inspect-js/is-regex.svg

[5]: https://david-dm.org/inspect-js/is-regex.svg

[6]: https://david-dm.org/inspect-js/is-regex

[7]: https://david-dm.org/inspect-js/is-regex/dev-status.svg

[8]: https://david-dm.org/inspect-js/is-regex#info=devDependencies

[11]: https://nodei.co/npm/is-regex.png?downloads=true&stars=true

[license-image]: https://img.shields.io/npm/l/is-regex.svg

[license-url]: LICENSE

[downloads-image]: https://img.shields.io/npm/dm/is-regex.svg

[downloads-url]: https://npm-stat.com/charts.html?package=is-regex

[codecov-image]: https://codecov.io/gh/inspect-js/is-regex/branch/main/graphs/badge.svg

[codecov-url]: https://app.codecov.io/gh/inspect-js/is-regex/

[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-regex

[actions-url]: https://github.com/inspect-js/is-regex/actions