55 lines
1.6 KiB
Markdown
55 lines
1.6 KiB
Markdown
#is-regex <sup>[![Version Badge][2]][1]</sup>
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[![Build Status][3]][4]
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[![dependency status][5]][6]
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[![dev dependency status][7]][8]
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[![License][license-image]][license-url]
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[![Downloads][downloads-image]][downloads-url]
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[![npm badge][11]][1]
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[![browser support][9]][10]
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Is this value a JS regex?
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This module works cross-realm/iframe, and despite ES6 @@toStringTag.
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## Example
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```js
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var isRegex = require('is-regex');
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var assert = require('assert');
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assert.notOk(isRegex(undefined));
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assert.notOk(isRegex(null));
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assert.notOk(isRegex(false));
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assert.notOk(isRegex(true));
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assert.notOk(isRegex(42));
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assert.notOk(isRegex('foo'));
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assert.notOk(isRegex(function () {}));
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assert.notOk(isRegex([]));
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assert.notOk(isRegex({}));
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assert.ok(isRegex(/a/g));
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assert.ok(isRegex(new RegExp('a', 'g')));
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```
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## Tests
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Simply clone the repo, `npm install`, and run `npm test`
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[1]: https://npmjs.org/package/is-regex
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[2]: http://versionbadg.es/ljharb/is-regex.svg
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[3]: https://travis-ci.org/ljharb/is-regex.svg
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[4]: https://travis-ci.org/ljharb/is-regex
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[5]: https://david-dm.org/ljharb/is-regex.svg
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[6]: https://david-dm.org/ljharb/is-regex
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[7]: https://david-dm.org/ljharb/is-regex/dev-status.svg
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[8]: https://david-dm.org/ljharb/is-regex#info=devDependencies
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[9]: https://ci.testling.com/ljharb/is-regex.png
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[10]: https://ci.testling.com/ljharb/is-regex
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[11]: https://nodei.co/npm/is-regex.png?downloads=true&stars=true
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[license-image]: http://img.shields.io/npm/l/is-regex.svg
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[license-url]: LICENSE
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[downloads-image]: http://img.shields.io/npm/dm/is-regex.svg
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[downloads-url]: http://npm-stat.com/charts.html?package=is-regex
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