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authorLinuxWizard42 <computerwizard@linuxmail.org>2022-10-12 22:54:37 +0300
committerLinuxWizard42 <computerwizard@linuxmail.org>2022-10-12 22:54:37 +0300
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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