Return an array of an object's own enumerable property names and symbols.
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> Return an array of an object's own enumerable property names and symbols.
``bash`
npm install @stdlib/utils-enumerable-properties
`javascript`
var enumerableProperties = require( '@stdlib/utils-enumerable-properties' );
#### enumerableProperties( obj )
Returns an array of an object's own enumerable property names and symbols.
`javascript
var obj = {
'a': 1,
'b': 2
};
var props = enumerableProperties( obj );
// e.g., returns [ 'a', 'b' ]
`
- Property order is not guaranteed, as object property enumeration is not specified according to the [ECMAScript specification][ecma-262-for-in]. In practice, however, most engines use insertion order to sort an object's properties, thus allowing for deterministic extraction.
`javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var Symbol = require( '@stdlib/symbol-ctor' );
var enumerableProperties = require( '@stdlib/utils-enumerable-properties' );
var hasSymbols = hasSymbolSupport();
var props;
var obj;
function Foo() {
this.a = 'a';
defineProperty( this, 'b', {
'configurable': true,
'enumerable': false,
'writable': true,
'value': 'b'
});
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'a';
defineProperty( this, Symbol( 'b' ), {
'configurable': true,
'enumerable': false,
'writable': true,
'value': 'b'
});
}
return this;
}
Foo.prototype.c = 'c';
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'c' ) ] = 'c';
}
obj = new Foo();
props = enumerableProperties( obj );
console.log( props );
// e.g., => [ 'a', ... ]
`
*
- [@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-enumerable-property-symbols][@stdlib/utils/enumerable-property-symbols]: return an array of an object's own enumerable symbol properties.
- [@stdlib/utils-inherited-enumerable-properties][@stdlib/utils/inherited-enumerable-properties]: return an array of an object's inherited enumerable property names and symbols.
- [@stdlib/utils-keys][@stdlib/utils/keys]: return an array of an object's own enumerable property names.
- [@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][@stdlib/utils/properties]: return an array of an object's own enumerable and non-enumerable 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].
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---
See [LICENSE][stdlib-license].
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[test-image]: https://github.com/stdlib-js/utils-enumerable-properties/actions/workflows/test.yml/badge.svg?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-enumerable-properties/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-enumerable-properties/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-enumerable-properties/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-enumerable-properties/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-enumerable-properties/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-enumerable-properties/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-enumerable-properties/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-enumerable-properties/main/LICENSE
[ecma-262-for-in]: https://262.ecma-international.org/5.1/#sec-12.6.4
[@stdlib/utils/enumerable-properties-in]: https://www.npmjs.com/package/@stdlib/utils-enumerable-properties-in
[@stdlib/utils/enumerable-property-symbols]: https://www.npmjs.com/package/@stdlib/utils-enumerable-property-symbols
[@stdlib/utils/inherited-enumerable-properties]: https://www.npmjs.com/package/@stdlib/utils-inherited-enumerable-properties
[@stdlib/utils/keys]: https://www.npmjs.com/package/@stdlib/utils-keys
[@stdlib/utils/nonenumerable-properties]: https://www.npmjs.com/package/@stdlib/utils-nonenumerable-properties
[@stdlib/utils/properties]: https://www.npmjs.com/package/@stdlib/utils-properties