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