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						- # define-properties <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
 - 
 - [![github actions][actions-image]][actions-url]
 - [![coverage][codecov-image]][codecov-url]
 - [![dependency status][deps-svg]][deps-url]
 - [![dev dependency status][dev-deps-svg]][dev-deps-url]
 - [![License][license-image]][license-url]
 - [![Downloads][downloads-image]][downloads-url]
 - 
 - [![npm badge][npm-badge-png]][package-url]
 - 
 - Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.
 - Existing properties are not overridden. Accepts a map of property names to a predicate that, when true, force-overrides.
 - 
 - ## Example
 - 
 - ```js
 - var define = require('define-properties');
 - var assert = require('assert');
 - 
 - var obj = define({ a: 1, b: 2 }, {
 - 	a: 10,
 - 	b: 20,
 - 	c: 30
 - });
 - assert(obj.a === 1);
 - assert(obj.b === 2);
 - assert(obj.c === 30);
 - if (define.supportsDescriptors) {
 - 	assert.deepEqual(Object.keys(obj), ['a', 'b']);
 - 	assert.deepEqual(Object.getOwnPropertyDescriptor(obj, 'c'), {
 - 		configurable: true,
 - 		enumerable: false,
 - 		value: 30,
 - 		writable: false
 - 	});
 - }
 - ```
 - 
 - Then, with predicates:
 - ```js
 - var define = require('define-properties');
 - var assert = require('assert');
 - 
 - var obj = define({ a: 1, b: 2, c: 3 }, {
 - 	a: 10,
 - 	b: 20,
 - 	c: 30
 - }, {
 - 	a: function () { return false; },
 - 	b: function () { return true; }
 - });
 - assert(obj.a === 1);
 - assert(obj.b === 20);
 - assert(obj.c === 3);
 - if (define.supportsDescriptors) {
 - 	assert.deepEqual(Object.keys(obj), ['a', 'c']);
 - 	assert.deepEqual(Object.getOwnPropertyDescriptor(obj, 'b'), {
 - 		configurable: true,
 - 		enumerable: false,
 - 		value: 20,
 - 		writable: false
 - 	});
 - }
 - ```
 - 
 - ## Tests
 - Simply clone the repo, `npm install`, and run `npm test`
 - 
 - [package-url]: https://npmjs.org/package/define-properties
 - [npm-version-svg]: https://versionbadg.es/ljharb/define-properties.svg
 - [deps-svg]: https://david-dm.org/ljharb/define-properties.svg
 - [deps-url]: https://david-dm.org/ljharb/define-properties
 - [dev-deps-svg]: https://david-dm.org/ljharb/define-properties/dev-status.svg
 - [dev-deps-url]: https://david-dm.org/ljharb/define-properties#info=devDependencies
 - [npm-badge-png]: https://nodei.co/npm/define-properties.png?downloads=true&stars=true
 - [license-image]: https://img.shields.io/npm/l/define-properties.svg
 - [license-url]: LICENSE
 - [downloads-image]: https://img.shields.io/npm/dm/define-properties.svg
 - [downloads-url]: https://npm-stat.com/charts.html?package=define-properties
 - [codecov-image]: https://codecov.io/gh/ljharb/define-properties/branch/main/graphs/badge.svg
 - [codecov-url]: https://app.codecov.io/gh/ljharb/define-properties/
 - [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/define-properties
 - [actions-url]: https://github.com/ljharb/define-properties/actions
 
 
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