Test if an object's own property is non-enumerable.
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> Test if an object's own property is non-enumerable.
``bash`
npm install @stdlib/assert-is-nonenumerable-property
`javascript`
var isNonEnumerableProperty = require( '@stdlib/assert-is-nonenumerable-property' );
#### isNonEnumerableProperty( value, property )
Returns a boolean indicating if a value has a non-enumerable property.
`javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var obj = {
'foo': 'bar'
};
defineProperty( obj, 'beep', {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'boop'
});
var bool = isNonEnumerableProperty( obj, 'beep' );
// returns true
bool = isNonEnumerableProperty( obj, 'foo' );
// returns false
`
- Value arguments other than null or undefined are coerced to objects.
`javascript`
var bool = isNonEnumerableProperty( 'beep', 'length' );
// returns true
`javascript
var isNonEnumerableProperty = require( '@stdlib/assert-is-nonenumerable-property' );
var bool = isNonEnumerableProperty( [ 'a' ], 'length' );
// returns true
bool = isNonEnumerableProperty( { 'a': 'b' }, 'a' );
// returns false
bool = isNonEnumerableProperty( [ 'a' ], 0 );
// returns false
bool = isNonEnumerableProperty( {}, 'toString' );
// returns false
bool = isNonEnumerableProperty( {}, 'hasOwnProperty' );
// returns false
bool = isNonEnumerableProperty( null, 'a' );
// returns false
bool = isNonEnumerableProperty( void 0, 'a' );
// returns false
bool = isNonEnumerableProperty( { 'null': false }, null );
// returns false
bool = isNonEnumerableProperty( { '[object Object]': false }, {} );
// returns false
`
*
- [@stdlib/assert-is-configurable-property][@stdlib/assert/is-configurable-property]: test if an object's own property is configurable.
- [@stdlib/assert-is-enumerable-property][@stdlib/assert/is-enumerable-property]: test if an object's own property is enumerable.
- [@stdlib/assert-is-nonconfigurable-property][@stdlib/assert/is-nonconfigurable-property]: test if an object's own property is non-configurable.
- [@stdlib/assert-is-nonenumerable-property-in][@stdlib/assert/is-nonenumerable-property-in]: test if an object's own or inherited 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].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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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/assert-is-nonenumerable-property/tree/deno
[deno-readme]: https://github.com/stdlib-js/assert-is-nonenumerable-property/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/assert-is-nonenumerable-property/tree/umd
[umd-readme]: https://github.com/stdlib-js/assert-is-nonenumerable-property/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/assert-is-nonenumerable-property/tree/esm
[esm-readme]: https://github.com/stdlib-js/assert-is-nonenumerable-property/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/assert-is-nonenumerable-property/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/assert-is-nonenumerable-property/main/LICENSE
[@stdlib/assert/is-configurable-property]: https://www.npmjs.com/package/@stdlib/assert-is-configurable-property
[@stdlib/assert/is-enumerable-property]: https://www.npmjs.com/package/@stdlib/assert-is-enumerable-property
[@stdlib/assert/is-nonconfigurable-property]: https://www.npmjs.com/package/@stdlib/assert-is-nonconfigurable-property
[@stdlib/assert/is-nonenumerable-property-in]: https://www.npmjs.com/package/@stdlib/assert-is-nonenumerable-property-in
[@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