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#object-keys <sup>[![Version Badge][npm-version-svg]][package-url]</sup> [![Build Status][travis-svg]][travis-url] [![dependency status][deps-svg]][deps-url] [![dev dependency status][dev-deps-svg]][dev-deps-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url] [![npm badge][npm-badge-png]][package-url] [![browser support][testling-svg]][testling-url] An Object.keys shim. Invoke its "shim" method to shim Object.keys if it is unavailable. Most common usage: ```js var keys = Object.keys || require('object-keys'); ``` ## Example ```js var keys = require('object-keys'); var assert = require('assert'); var obj = { a: true, b: true, c: true }; assert.deepEqual(keys(obj), ['a', 'b', 'c']); ``` ```js var keys = require('object-keys'); var assert = require('assert'); /* when Object.keys is not present */ delete Object.keys; var shimmedKeys = keys.shim(); assert.equal(shimmedKeys, keys); assert.deepEqual(Object.keys(obj), keys(obj)); ``` ```js var keys = require('object-keys'); var assert = require('assert'); /* when Object.keys is present */ var shimmedKeys = keys.shim(); assert.equal(shimmedKeys, Object.keys); assert.deepEqual(Object.keys(obj), keys(obj)); ``` ## Source Implementation taken directly from [es5-shim][es5-shim-url], with modifications, including from [lodash][lodash-url]. ## Tests Simply clone the repo, `npm install`, and run `npm test` [package-url]: https://npmjs.org/package/object-keys [npm-version-svg]: http://versionbadg.es/ljharb/object-keys.svg [travis-svg]: https://travis-ci.org/ljharb/object-keys.svg [travis-url]: https://travis-ci.org/ljharb/object-keys [deps-svg]: https://david-dm.org/ljharb/object-keys.svg [deps-url]: https://david-dm.org/ljharb/object-keys [dev-deps-svg]: https://david-dm.org/ljharb/object-keys/dev-status.svg [dev-deps-url]: https://david-dm.org/ljharb/object-keys#info=devDependencies [testling-svg]: https://ci.testling.com/ljharb/object-keys.png [testling-url]: https://ci.testling.com/ljharb/object-keys [es5-shim-url]: https://github.com/es-shims/es5-shim/blob/master/es5-shim.js#L542-589 [lodash-url]: https://github.com/lodash/lodash [npm-badge-png]: https://nodei.co/npm/object-keys.png?downloads=true&stars=true [license-image]: http://img.shields.io/npm/l/object-keys.svg [license-url]: LICENSE [downloads-image]: http://img.shields.io/npm/dm/object-keys.svg [downloads-url]: http://npm-stat.com/charts.html?package=object-keys