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#is-regex <sup>[![Version Badge][2]][1]</sup> [![Build Status][3]][4] [![dependency status][5]][6] [![dev dependency status][7]][8] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url] [![npm badge][11]][1] [![browser support][9]][10] 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]: http://versionbadg.es/ljharb/is-regex.svg [3]: https://travis-ci.org/ljharb/is-regex.svg [4]: https://travis-ci.org/ljharb/is-regex [5]: https://david-dm.org/ljharb/is-regex.svg [6]: https://david-dm.org/ljharb/is-regex [7]: https://david-dm.org/ljharb/is-regex/dev-status.svg [8]: https://david-dm.org/ljharb/is-regex#info=devDependencies [9]: https://ci.testling.com/ljharb/is-regex.png [10]: https://ci.testling.com/ljharb/is-regex [11]: https://nodei.co/npm/is-regex.png?downloads=true&stars=true [license-image]: http://img.shields.io/npm/l/is-regex.svg [license-url]: LICENSE [downloads-image]: http://img.shields.io/npm/dm/is-regex.svg [downloads-url]: http://npm-stat.com/charts.html?package=is-regex