Test if an object's own property is enumerable.
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> Test if an object's own property is enumerable.
``bash`
npm install @stdlib/assert-is-enumerable-property
`javascript`
var isEnumerableProperty = require( '@stdlib/assert-is-enumerable-property' );
#### isEnumerableProperty( value, property )
Returns a boolean indicating if a value has an enumerable property.
`javascript
var value = {
'beep': 'boop'
};
var bool = isEnumerableProperty( value, 'beep' );
// returns true
bool = isEnumerableProperty( value, 'constructor' );
// returns false
`
- In contrast to the native [Object.prototype.propertyIsEnumerable][mdn-object-property-is-enumerable], this function does not throw when provided null or undefined. Instead, the function returns false.
`javascript
var bool = isEnumerableProperty( null, 'a' );
// returns false
bool = isEnumerableProperty( void 0, 'a' );
// returns false
`
- Value arguments other than null or undefined are coerced to objects.
`javascript`
var bool = isEnumerableProperty( 'beep', '1' );
// returns true
- Property arguments are coerced to strings.
`javascript
var value = {
'null': false
};
var bool = isEnumerableProperty( value, null );
// returns true
value = {
'[object Object]': false
};
bool = isEnumerableProperty( value, {} );
// returns true
`
`javascript
var isEnumerableProperty = require( '@stdlib/assert-is-enumerable-property' );
var bool = isEnumerableProperty( { 'a': 'b' }, 'a' );
// returns true
bool = isEnumerableProperty( [ 'a' ], 0 );
// returns true
bool = isEnumerableProperty( [ 'a' ], 'length' );
// returns false
bool = isEnumerableProperty( {}, 'toString' );
// returns false
bool = isEnumerableProperty( {}, 'hasOwnProperty' );
// returns false
bool = isEnumerableProperty( null, 'a' );
// returns false
bool = isEnumerableProperty( void 0, 'a' );
// returns false
bool = isEnumerableProperty( { 'null': false }, null );
// returns true
bool = isEnumerableProperty( { '[object Object]': false }, {} );
// returns true
`
*
- [@stdlib/assert-is-configurable-property][@stdlib/assert/is-configurable-property]: test if an object's own property is configurable.
- [@stdlib/assert-is-enumerable-property-in][@stdlib/assert/is-enumerable-property-in]: test if an object's own or inherited property is enumerable.
- [@stdlib/assert-is-nonenumerable-property][@stdlib/assert/is-nonenumerable-property]: test if an object's own property is non-enumerable.
- [@stdlib/assert-is-readable-property][@stdlib/assert/is-readable-property]: test if an object's own property is readable.
- [@stdlib/assert-is-writable-property][@stdlib/assert/is-writable-property]: test if an object's own property is writable.
*
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]
---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[npm-url]: https://npmjs.org/package/@stdlib/assert-is-enumerable-property
[test-image]: https://github.com/stdlib-js/assert-is-enumerable-property/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/assert-is-enumerable-property/actions/workflows/test.yml?query=branch:v0.2.3
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/assert-is-enumerable-property/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/assert-is-enumerable-property?branch=main
[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com
[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/assert-is-enumerable-property/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-enumerable-property/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-enumerable-property/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-enumerable-property/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-enumerable-property/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-enumerable-property/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-enumerable-property/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-enumerable-property/main/LICENSE
[mdn-object-property-is-enumerable]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable
[@stdlib/assert/is-configurable-property]: https://www.npmjs.com/package/@stdlib/assert-is-configurable-property
[@stdlib/assert/is-enumerable-property-in]: https://www.npmjs.com/package/@stdlib/assert-is-enumerable-property-in
[@stdlib/assert/is-nonenumerable-property]: https://www.npmjs.com/package/@stdlib/assert-is-nonenumerable-property
[@stdlib/assert/is-readable-property]: https://www.npmjs.com/package/@stdlib/assert-is-readable-property
[@stdlib/assert/is-writable-property]: https://www.npmjs.com/package/@stdlib/assert-is-writable-property