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# define-data-property <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
[![github actions][actions-image]][actions-url] [![coverage][codecov-image]][codecov-url] [![License][license-image]][license-url] [![Downloads][downloads-image]][downloads-url]
[![npm badge][npm-badge-png]][package-url]
Define a data property on an object. Will fall back to assignment in an engine without descriptors.
The three `non*` argument can also be passed `null`, which will use the existing state if available.
The `loose` argument will mean that if you attempt to set a non-normal data property, in an environment without descriptor support, it will fall back to normal assignment.
## Usage
```javascript var defineDataProperty = require('define-data-property'); var assert = require('assert');
var obj = {}; defineDataProperty(obj, 'key', 'value'); defineDataProperty( obj, 'key2', 'value', true, // nonEnumerable, optional false, // nonWritable, optional true, // nonConfigurable, optional false // loose, optional );
assert.deepEqual( Object.getOwnPropertyDescriptors(obj), { key: { configurable: true, enumerable: true, value: 'value', writable: true, }, key2: { configurable: false, enumerable: false, value: 'value', writable: true, }, } ); ```
[package-url]: https://npmjs.org/package/define-data-property [npm-version-svg]: https://versionbadg.es/ljharb/define-data-property.svg [deps-svg]: https://david-dm.org/ljharb/define-data-property.svg [deps-url]: https://david-dm.org/ljharb/define-data-property [dev-deps-svg]: https://david-dm.org/ljharb/define-data-property/dev-status.svg [dev-deps-url]: https://david-dm.org/ljharb/define-data-property#info=devDependencies [npm-badge-png]: https://nodei.co/npm/define-data-property.png?downloads=true&stars=true [license-image]: https://img.shields.io/npm/l/define-data-property.svg [license-url]: LICENSE [downloads-image]: https://img.shields.io/npm/dm/define-data-property.svg [downloads-url]: https://npm-stat.com/charts.html?package=define-data-property [codecov-image]: https://codecov.io/gh/ljharb/define-data-property/branch/main/graphs/badge.svg [codecov-url]: https://app.codecov.io/gh/ljharb/define-data-property/ [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/define-data-property [actions-url]: https://github.com/ljharb/define-data-property/actions
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