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100 lines
3.9 KiB
100 lines
3.9 KiB
# object.getownpropertydescriptors <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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[![dependency status][deps-svg]][deps-url] |
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[![dev dependency status][dev-deps-svg]][dev-deps-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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An ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5. |
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Invoke its "shim" method to shim `Object.getOwnPropertyDescriptors` if it is unavailable, and if `Object.getOwnPropertyDescriptor` is available. |
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This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://github.com/tc39/ecma262/pull/582). |
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## Example |
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```js |
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var getDescriptors = require('object.getownpropertydescriptors'); |
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var assert = require('assert'); |
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var obj = { normal: Infinity }; |
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var enumDescriptor = { |
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enumerable: false, |
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writable: false, |
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configurable: true, |
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value: true |
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}; |
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var writableDescriptor = { |
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enumerable: true, |
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writable: true, |
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configurable: true, |
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value: 42 |
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}; |
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var symbol = Symbol(); |
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var symDescriptor = { |
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enumerable: true, |
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writable: true, |
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configurable: false, |
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value: [symbol] |
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}; |
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Object.defineProperty(obj, 'enumerable', enumDescriptor); |
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Object.defineProperty(obj, 'writable', writableDescriptor); |
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Object.defineProperty(obj, 'symbol', symDescriptor); |
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var descriptors = getDescriptors(obj); |
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assert.deepEqual(descriptors, { |
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normal: { |
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enumerable: true, |
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writable: true, |
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configurable: true, |
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value: Infinity |
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}, |
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enumerable: enumDescriptor, |
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writable: writableDescriptor, |
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symbol: symDescriptor |
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}); |
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``` |
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```js |
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var getDescriptors = require('object.getownpropertydescriptors'); |
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var assert = require('assert'); |
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/* when Object.getOwnPropertyDescriptors is not present */ |
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delete Object.getOwnPropertyDescriptors; |
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var shimmedDescriptors = getDescriptors.shim(); |
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assert.equal(shimmedDescriptors, getDescriptors); |
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assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj)); |
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``` |
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```js |
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var getDescriptors = require('object.getownpropertydescriptors'); |
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var assert = require('assert'); |
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/* when Object.getOwnPropertyDescriptors is present */ |
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var shimmedDescriptors = getDescriptors.shim(); |
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assert.notEqual(shimmedDescriptors, getDescriptors); |
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assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj)); |
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``` |
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## Tests |
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Simply clone the repo, `npm install`, and run `npm test` |
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[package-url]: https://npmjs.org/package/object.getownpropertydescriptors |
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[npm-version-svg]: http://versionbadg.es/es-shims/Object.getOwnPropertyDescriptors.svg |
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[travis-svg]: https://travis-ci.org/es-shims/Object.getOwnPropertyDescriptors.svg |
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[travis-url]: https://travis-ci.org/es-shims/Object.getOwnPropertyDescriptors |
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[deps-svg]: https://david-dm.org/es-shims/Object.getOwnPropertyDescriptors.svg |
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[deps-url]: https://david-dm.org/es-shims/Object.getOwnPropertyDescriptors |
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[dev-deps-svg]: https://david-dm.org/es-shims/Object.getOwnPropertyDescriptors/dev-status.svg |
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[dev-deps-url]: https://david-dm.org/es-shims/Object.getOwnPropertyDescriptors#info=devDependencies |
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[npm-badge-png]: https://nodei.co/npm/object.getownpropertydescriptors.png?downloads=true&stars=true |
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[license-image]: http://img.shields.io/npm/l/object.getownpropertydescriptors.svg |
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[license-url]: LICENSE |
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[downloads-image]: http://img.shields.io/npm/dm/object.getownpropertydescriptors.svg |
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[downloads-url]: http://npm-stat.com/charts.html?package=object.getownpropertydescriptors |
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[codecov-image]: https://codecov.io/gh/es-shims/Object.getOwnPropertyDescriptors/branch/main/graphs/badge.svg |
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[codecov-url]: https://app.codecov.io/gh/es-shims/Object.getOwnPropertyDescriptors/ |
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[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/es-shims/Object.getOwnPropertyDescriptors |
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[actions-url]: https://github.com/es-shims/Object.getOwnPropertyDescriptors/actions
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