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90 lines
2.7 KiB
Markdown
90 lines
2.7 KiB
Markdown
5 years ago
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# is-equal-shallow [](http://badge.fury.io/js/is-equal-shallow) [](https://travis-ci.org/jonschlinkert/is-equal-shallow)
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> Does a shallow comparison of two objects, returning false if the keys or values differ.
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The purpose of this lib is to do the fastest comparison possible of two objects when the values will predictably be primitives.
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* only compares objects.
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* only compares the first level of each object
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* values must be primitives. If a value is not a primitive, even if the values are the same, `false` is returned.
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Install with [npm](https://www.npmjs.com/)
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```sh
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$ npm i is-equal-shallow --save
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```
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## Usage
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```js
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var equals = require('is-equal-shallow');
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equals(object_a, object_b);
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```
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**Examples**
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```js
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equals({a: true, b: true}, {a: true, b: true});
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//=> 'true'
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equals({a: true, b: false}, {c: false, b: false});
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//=> 'false'
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equals({a: true, b: false}, {a: false, b: false});
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//=> 'false'
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```
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Strict comparison for equality:
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```js
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equals({a: true, b: true}, {a: true, b: 'true'});
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//=> 'false'
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```
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When values are not primitives, `false` is always returned:
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```js
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equals({ b: {}}, { b: {}});
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//=> 'false'
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equals({ b: []}, { b: []});
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//=> 'false'
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```
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## Related projects
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Other object utils:
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* [clone-deep](https://github.com/jonschlinkert/clone-deep): Recursively (deep) clone JavaScript native types, like Object, Array, RegExp, Date as well as primitives.
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* [for-in](https://github.com/jonschlinkert/for-in): Iterate over the own and inherited enumerable properties of an objecte, and return an object… [more](https://github.com/jonschlinkert/for-in)
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* [for-own](https://github.com/jonschlinkert/for-own): Iterate over the own enumerable properties of an object, and return an object with properties… [more](https://github.com/jonschlinkert/for-own)
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* [is-plain-object](https://github.com/jonschlinkert/is-plain-object): Returns true if an object was created by the `Object` constructor.
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* [isobject](https://github.com/jonschlinkert/isobject): Returns true if the value is an object and not an array or null.
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## Running tests
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Install dev dependencies:
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```sh
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$ npm i -d && npm test
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```
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## Contributing
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Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/is-equal-shallow/issues/new)
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## Author
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**Jon Schlinkert**
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+ [github/jonschlinkert](https://github.com/jonschlinkert)
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+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
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## License
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Copyright © 2015 Jon Schlinkert
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Released under the MIT license.
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***
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_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on June 22, 2015._
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