npm package: @stdlib/assert-is-property-key
Description: Test whether a value is a property key.
Author: The Stdlib Authors
Latest version: 0.2.3

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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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# isPropertyKey

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

> Test whether a value is a property key.

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

```bash
npm install @stdlib/assert-is-property-key
```

</section>

<section class="usage">

## Usage

```javascript
var isPropertyKey = require( '@stdlib/assert-is-property-key' );
```

#### isPropertyKey( value )

Tests whether a value is a property key.

```javascript
var bool = isPropertyKey( 'beep' );
// returns true

bool = isPropertyKey( 3.14 );
// returns false
```

</section>

<!-- /.usage -->

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

## Notes

-   A valid property key is either a string, symbol, or a nonnegative integer. For example, `'beep'`, `Symbol( 'beep' )`, and `3` are all valid property keys.
-   Only primitive values are considered to be valid property keys. This excludes object wrappers such as `new String( 'beep' )`.

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

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

```javascript
var Symbol = require( '@stdlib/symbol-ctor' );
var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var isPropertyKey = require( '@stdlib/assert-is-property-key' );

var hasSymbols = hasSymbolSupport();
var bool = isPropertyKey( 'beep' );
// returns true

if ( hasSymbols ) {
    bool = isPropertyKey( Symbol( 'beep' ) );
    // returns true
} else {
    console.log( 'Environment does not support symbols.' );
}

bool = isPropertyKey( 37 );
// returns true

bool = isPropertyKey( {} );
// returns false

bool = isPropertyKey( [] );
// returns false
```

</section>

<!-- /.examples -->

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* * *

## See Also

-   <span class="package-name">[`@stdlib/assert-is-string`][@stdlib/assert/is-string]</span><span class="delimiter">: </span><span class="description">test if a value is a string.</span>
-   <span class="package-name">[`@stdlib/assert-is-symbol`][@stdlib/assert/is-symbol]</span><span class="delimiter">: </span><span class="description">test if a value is a symbol.</span>
-   <span class="package-name">[`@stdlib/assert-is-nonnegative-integer`][@stdlib/assert/is-nonnegative-integer]</span><span class="delimiter">: </span><span class="description">test if a value is a number having a nonnegative integer value.</span>
-   <span class="package-name">[`@stdlib/assert-has-own-property`][@stdlib/assert/has-own-property]</span><span class="delimiter">: </span><span class="description">test if an object has a specified property.</span>
-   <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>

</section>

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<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

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---

## License

See [LICENSE][stdlib-license].


## Copyright

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

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[deno-url]: https://github.com/stdlib-js/assert-is-property-key/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-property-key/blob/deno/README.md
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[esm-url]: https://github.com/stdlib-js/assert-is-property-key/tree/esm
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-property-key/main/LICENSE

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[@stdlib/assert/is-string]: https://www.npmjs.com/package/@stdlib/assert-is-string

[@stdlib/assert/is-symbol]: https://www.npmjs.com/package/@stdlib/assert-is-symbol

[@stdlib/assert/is-nonnegative-integer]: https://www.npmjs.com/package/@stdlib/assert-is-nonnegative-integer

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

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

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