Return a property descriptor for an object's own or inherited property.
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> Return a property descriptor for an object's own or inherited property.
``bash`
npm install @stdlib/utils-property-descriptor-in
`javascript`
var propertyDescriptorIn = require( '@stdlib/utils-property-descriptor-in' );
#### propertyDescriptorIn( obj, property )
Returns a property descriptor for an object's own or inherited property.
`javascript
var obj = {
'a': 1,
'b': 2
};
var desc = propertyDescriptorIn( obj, 'a' );
// returns {'configurable':true,'enumerable':true,'writable':true,'value':1}
`
- This function differs from the built-in Object.getOwnPropertyDescriptor() as follows:
- If provided null or undefined, the function returns null, rather than throwing an error.null
- If an object does not have a provided property, the function returns , rather than undefined.
`javascript
var defineProperty = require( '@stdlib/utils-define-property' );
var propertyDescriptorIn = require( '@stdlib/utils-property-descriptor-in' );
function Foo() {
this.beep = 'boop';
this.a = {
'b': 'c'
};
defineProperty( this, 'baz', {
'value': 'qux',
'configurable': true,
'writable': true,
'enumerable': false
});
return this;
}
Foo.prototype.foo = [ 'bar' ];
var obj = new Foo();
var desc = propertyDescriptorIn( obj, 'foo' );
console.log( desc );
// => {'configurable':true,'enumerable':true,'writable':true,'value':['bar']}
`
*
- [@stdlib/assert-has-property][@stdlib/assert/has-property]: test if an object has a specified property, either own or inherited.
- [@stdlib/utils-define-property][@stdlib/utils/define-property]: define (or modify) an object property.
- [@stdlib/utils-property-descriptor][@stdlib/utils/property-descriptor]: return a property descriptor for an object's own property.
- [@stdlib/utils-property-descriptors-in][@stdlib/utils/property-descriptors-in]: return an object's own and inherited property descriptors.
*
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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[umd]: https://github.com/umdjs/umd
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[deno-url]: https://github.com/stdlib-js/utils-property-descriptor-in/tree/deno
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[@stdlib/assert/has-property]: https://www.npmjs.com/package/@stdlib/assert-has-property
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[@stdlib/utils/property-descriptor]: https://www.npmjs.com/package/@stdlib/utils-property-descriptor
[@stdlib/utils/property-descriptors-in]: https://www.npmjs.com/package/@stdlib/utils-property-descriptors-in