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77 lines
2.1 KiB
Markdown
Executable File
77 lines
2.1 KiB
Markdown
Executable File
#object-keys <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][13]][1]
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[![browser support][9]][10]
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An Object.keys shim. Invoke its "shim" method to shim Object.keys if it is unavailable.
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Most common usage:
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```js
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var keys = Object.keys || require('object-keys');
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```
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## Example
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```js
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var keys = require('object-keys');
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var assert = require('assert');
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var obj = {
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a: true,
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b: true,
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c: true
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};
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assert.deepEqual(keys(obj), ['a', 'b', 'c']);
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```
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```js
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var keys = require('object-keys');
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var assert = require('assert');
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/* when Object.keys is not present */
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delete Object.keys;
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var shimmedKeys = keys.shim();
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assert.equal(shimmedKeys, keys);
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assert.deepEqual(Object.keys(obj), keys(obj));
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```
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```js
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var keys = require('object-keys');
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var assert = require('assert');
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/* when Object.keys is present */
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var shimmedKeys = keys.shim();
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assert.equal(shimmedKeys, Object.keys);
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assert.deepEqual(Object.keys(obj), keys(obj));
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```
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## Source
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Implementation taken directly from [es5-shim][11], with modifications, including from [lodash][12].
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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/object-keys
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[2]: http://vb.teelaun.ch/ljharb/object-keys.svg
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[3]: https://travis-ci.org/ljharb/object-keys.svg
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[4]: https://travis-ci.org/ljharb/object-keys
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[5]: https://david-dm.org/ljharb/object-keys.svg
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[6]: https://david-dm.org/ljharb/object-keys
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[7]: https://david-dm.org/ljharb/object-keys/dev-status.svg
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[8]: https://david-dm.org/ljharb/object-keys#info=devDependencies
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[9]: https://ci.testling.com/ljharb/object-keys.png
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[10]: https://ci.testling.com/ljharb/object-keys
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[11]: https://github.com/es-shims/es5-shim/blob/master/es5-shim.js#L542-589
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[12]: https://github.com/bestiejs/lodash
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[13]: https://nodei.co/npm/object-keys.png?downloads=true&stars=true
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[license-image]: http://img.shields.io/npm/l/object-keys.svg
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[license-url]: LICENSE
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[downloads-image]: http://img.shields.io/npm/dm/object-keys.svg
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[downloads-url]: http://npm-stat.com/charts.html?package=object-keys
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