npm package: @stdlib/object-common-keys-in
Description: Return the common own and inherited property names of two or more objects.
Author: The Stdlib Authors
Latest version: 0.1.1

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<details>
  <summary>
    About stdlib...
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  <p>We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.</p>
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# commonKeysIn

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Return the common own and inherited property names of two or more objects.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/object-common-keys-in
```

</section>

<section class="usage">

## Usage

```javascript
var commonKeysIn = require( '@stdlib/object-common-keys-in' );
```

#### commonKeysIn( obj1, obj2\[, obj3\[,...,objN]] )

Returns the common own and inherited property names of two or more objects.

```javascript
var obj = {
    'a': 1,
    'b': 2,
    'c': 3
};

var obj2 = {
    'a': 1,
    'b': 2
};

var keys = commonKeysIn( obj, obj2 );
// returns [ 'a', 'b' ]
```

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- Package usage examples. -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var commonKeysIn = require( '@stdlib/object-common-keys-in' );

function Foo() {
    this.beep = 'boop';
    this.a = {
        'b': 'c'
    };
    return this;
}

Foo.prototype.foo = [ 'bar' ];

var obj1 = new Foo();

var obj2 = {
    'beep': 'boop',
    'foo': 'bar'
};

var keys = commonKeysIn( obj1, obj2 );
// returns [ 'beep', 'foo' ]
```

</section>

<!-- /.examples -->

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* * *

## Notice

This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].

#### Community

[![Chat][chat-image]][chat-url]

---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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[npm-image]: http://img.shields.io/npm/v/@stdlib/object-common-keys-in.svg
[npm-url]: https://npmjs.org/package/@stdlib/object-common-keys-in

[test-image]: https://github.com/stdlib-js/object-common-keys-in/actions/workflows/test.yml/badge.svg?branch=v0.1.1
[test-url]: https://github.com/stdlib-js/object-common-keys-in/actions/workflows/test.yml?query=branch:v0.1.1

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/object-common-keys-in/main.svg
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[stdlib]: https://github.com/stdlib-js/stdlib

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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

[deno-url]: https://github.com/stdlib-js/object-common-keys-in/tree/deno
[deno-readme]: https://github.com/stdlib-js/object-common-keys-in/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/object-common-keys-in/tree/umd
[umd-readme]: https://github.com/stdlib-js/object-common-keys-in/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/object-common-keys-in/tree/esm
[esm-readme]: https://github.com/stdlib-js/object-common-keys-in/blob/esm/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/object-common-keys-in/main/LICENSE

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