npm package: @stdlib/utils-property-descriptor-in
Description: Return a property descriptor for an object's own or inherited property.
Author: The Stdlib Authors
Latest version: 0.2.3

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<details>
  <summary>
    About stdlib...
  </summary>
  <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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</details>

# propertyDescriptorIn

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

> Return a property descriptor for an object's own or inherited property.

<section class="installation">

## Installation

```bash
npm install @stdlib/utils-property-descriptor-in
```

</section>

<section class="usage">

## Usage

```javascript
var propertyDescriptorIn = require( '@stdlib/utils-property-descriptor-in' );
```

#### propertyDescriptorIn( obj, property )

Returns a property descriptor for an object's own or inherited property.

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

var desc = propertyDescriptorIn( obj, 'a' );
// returns {'configurable':true,'enumerable':true,'writable':true,'value':1}
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   This function differs from the built-in `Object.getOwnPropertyDescriptor()` as follows:

    -   If provided `null` or `undefined`, the function returns `null`, rather than throwing an error.
    -   If an object does not have a provided property, the function returns `null`, rather than `undefined`.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

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

```javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var propertyDescriptorIn = require( '@stdlib/utils-property-descriptor-in' );

function Foo() {
    this.beep = 'boop';
    this.a = {
        'b': 'c'
    };
    defineProperty( this, 'baz', {
        'value': 'qux',
        'configurable': true,
        'writable': true,
        'enumerable': false
    });
    return this;
}

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

var obj = new Foo();
var desc = propertyDescriptorIn( obj, 'foo' );

console.log( desc );
// => {'configurable':true,'enumerable':true,'writable':true,'value':['bar']}
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/assert-has-property`][@stdlib/assert/has-property]</span><span class="delimiter">: </span><span class="description">test if an object has a specified property, either own or inherited.</span>
-   <span class="package-name">[`@stdlib/utils-define-property`][@stdlib/utils/define-property]</span><span class="delimiter">: </span><span class="description">define (or modify) an object property.</span>
-   <span class="package-name">[`@stdlib/utils-property-descriptor`][@stdlib/utils/property-descriptor]</span><span class="delimiter">: </span><span class="description">return a property descriptor for an object's own property.</span>
-   <span class="package-name">[`@stdlib/utils-property-descriptors-in`][@stdlib/utils/property-descriptors-in]</span><span class="delimiter">: </span><span class="description">return an object's own and inherited property descriptors.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->


<section class="main-repo" >

* * *

## 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].

</section>

<!-- /.stdlib -->

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<section class="links">

[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-property-descriptor-in.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-property-descriptor-in

[test-image]: https://github.com/stdlib-js/utils-property-descriptor-in/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/utils-property-descriptor-in/actions/workflows/test.yml?query=branch:v0.2.3

[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-property-descriptor-in/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-property-descriptor-in?branch=main

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[stdlib]: https://github.com/stdlib-js/stdlib

[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors

[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/utils-property-descriptor-in/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-property-descriptor-in/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-property-descriptor-in/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-property-descriptor-in/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-property-descriptor-in/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-property-descriptor-in/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-property-descriptor-in/blob/main/branches.md

[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-property-descriptor-in/main/LICENSE

<!-- <related-links> -->

[@stdlib/assert/has-property]: https://www.npmjs.com/package/@stdlib/assert-has-property

[@stdlib/utils/define-property]: https://www.npmjs.com/package/@stdlib/utils-define-property

[@stdlib/utils/property-descriptor]: https://www.npmjs.com/package/@stdlib/utils-property-descriptor

[@stdlib/utils/property-descriptors-in]: https://www.npmjs.com/package/@stdlib/utils-property-descriptors-in

<!-- </related-links> -->

</section>

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