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node_modules/define-properties/README.md
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| r789 | #define-properties <sup>[![Version Badge][npm-version-svg]][package-url]</sup> | |||
| [![Build Status][travis-svg]][travis-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] | ||||
| [![browser support][testling-svg]][testling-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]: http://versionbadg.es/ljharb/define-properties.svg | ||||
| [travis-svg]: https://travis-ci.org/ljharb/define-properties.svg | ||||
| [travis-url]: https://travis-ci.org/ljharb/define-properties | ||||
| [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 | ||||
| [testling-svg]: https://ci.testling.com/ljharb/define-properties.png | ||||
| [testling-url]: https://ci.testling.com/ljharb/define-properties | ||||
| [npm-badge-png]: https://nodei.co/npm/define-properties.png?downloads=true&stars=true | ||||
| [license-image]: http://img.shields.io/npm/l/define-properties.svg | ||||
| [license-url]: LICENSE | ||||
| [downloads-image]: http://img.shields.io/npm/dm/define-properties.svg | ||||
| [downloads-url]: http://npm-stat.com/charts.html?package=define-properties | ||||