#object-keys ^{[![Version Badge][npm-version-svg]][package-url]}

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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