Return an array of an object's own and inherited non-enumerable property names and symbols.
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> Return an array of an object's own and inherited non-enumerable property names and [symbols][@stdlib/symbol/ctor].
``bash`
npm install @stdlib/utils-nonenumerable-properties-in
`javascript`
var nonEnumerablePropertiesIn = require( '@stdlib/utils-nonenumerable-properties-in' );
#### nonEnumerablePropertiesIn( obj )
Returns an array of an object's own and inherited non-enumerable property names and [symbols][@stdlib/symbol/ctor].
`javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var obj = {};
defineProperty( obj, 'a', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'a'
});
var props = nonEnumerablePropertiesIn( obj );
// returns [ 'a', ... ]
`
`javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var Symbol = require( '@stdlib/symbol-ctor' );
var nonEnumerablePropertiesIn = require( '@stdlib/utils-nonenumerable-properties-in' );
var hasSymbols = hasSymbolSupport();
function Foo() {
this.a = 'a';
defineProperty( this, 'b', {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'b'
});
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'a';
defineProperty( this, Symbol( 'b' ), {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'b'
});
}
return this;
}
Foo.prototype.foo = 'bar';
defineProperty( Foo.prototype, 'beep', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'boop'
});
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
defineProperty( Foo.prototype, Symbol( 'beep' ), {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'boop'
});
}
var obj = new Foo();
var props = nonEnumerablePropertiesIn( obj );
// returns [ 'b', 'beep', ... ]
`
*
- [@stdlib/utils-enumerable-properties-in][@stdlib/utils/enumerable-properties-in]: return an array of an object's own and inherited enumerable property names and symbols.
- [@stdlib/utils-inherited-nonenumerable-properties][@stdlib/utils/inherited-nonenumerable-properties]: return an array of an object's inherited non-enumerable property names and symbols.
- [@stdlib/utils-nonenumerable-properties][@stdlib/utils/nonenumerable-properties]: return an array of an object's own non-enumerable property names and symbols.
- [@stdlib/utils-properties-in][@stdlib/utils/properties-in]: return an array of an object's own and inherited property names and symbols.
*
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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[test-image]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/actions/workflows/test.yml/badge.svg?branch=v0.2.3
[test-url]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/actions/workflows/test.yml?query=branch:v0.2.3
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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/utils-nonenumerable-properties-in/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-nonenumerable-properties-in/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-nonenumerable-properties-in/main/LICENSE
[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor
[@stdlib/utils/enumerable-properties-in]: https://www.npmjs.com/package/@stdlib/utils-enumerable-properties-in
[@stdlib/utils/inherited-nonenumerable-properties]: https://www.npmjs.com/package/@stdlib/utils-inherited-nonenumerable-properties
[@stdlib/utils/nonenumerable-properties]: https://www.npmjs.com/package/@stdlib/utils-nonenumerable-properties
[@stdlib/utils/properties-in]: https://www.npmjs.com/package/@stdlib/utils-properties-in