Return an array of an object's own and inherited property names and symbols.
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> Return an array of an object's own and inherited property names and [symbols][@stdlib/symbol/ctor].
``bash`
npm install @stdlib/utils-properties-in
`javascript`
var propertiesIn = require( '@stdlib/utils-properties-in' );
#### propertiesIn( obj )
Returns an array of an object's own and inherited property names and [symbols][@stdlib/symbol/ctor].
`javascript`
var props = propertiesIn( [] );
// returns [...]
`javascript
var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var Symbol = require( '@stdlib/symbol-ctor' );
var propertiesIn = require( '@stdlib/utils-properties-in' );
var hasSymbols = hasSymbolSupport();
function Foo() {
this.a = 'b';
if ( hasSymbols ) {
this[ Symbol( 'a' ) ] = 'b';
}
return this;
}
Foo.prototype.foo = 'bar';
if ( hasSymbols ) {
Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
}
var obj = new Foo();
var props = propertiesIn( obj );
// returns [ 'a', 'foo', ... ]
`
*
- [@stdlib/utils-define-properties][@stdlib/utils/define-properties]: define (and/or modify) object properties.
- [@stdlib/utils-inherited-properties][@stdlib/utils/inherited-properties]: return an array of an object's inherited 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.
- [@stdlib/utils-property-names-in][@stdlib/utils/property-names-in]: return an array of an object's own and inherited enumerable and non-enumerable property names.
- [@stdlib/utils-property-symbols-in][@stdlib/utils/property-symbols-in]: return an array of an object's own and inherited symbol properties.
*
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/utils-properties-in/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-properties-in/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-properties-in/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-properties-in/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-properties-in/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-properties-in/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-properties-in/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-properties-in/main/LICENSE
[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor
[@stdlib/utils/define-properties]: https://www.npmjs.com/package/@stdlib/utils-define-properties
[@stdlib/utils/inherited-properties]: https://www.npmjs.com/package/@stdlib/utils-inherited-properties
[@stdlib/utils/properties]: https://www.npmjs.com/package/@stdlib/utils-properties
[@stdlib/utils/property-names-in]: https://www.npmjs.com/package/@stdlib/utils-property-names-in
[@stdlib/utils/property-symbols-in]: https://www.npmjs.com/package/@stdlib/utils-property-symbols-in