| # has-proto <sup>[![Version Badge][npm-version-svg]][package-url]</sup> |
| |
| [![github actions][actions-image]][actions-url] |
| [![coverage][codecov-image]][codecov-url] |
| [![License][license-image]][license-url] |
| [![Downloads][downloads-image]][downloads-url] |
| |
| [![npm badge][npm-badge-png]][package-url] |
| |
| Does this environment have the ability to set the [[Prototype]] of an object on creation with `__proto__`? |
| |
| ## Example |
| |
| ```js |
| var hasProto = require('has-proto'); |
| var assert = require('assert'); |
| |
| assert.equal(typeof hasProto(), 'boolean'); |
| |
| var hasProtoAccessor = require('has-proto/accessor')(); |
| if (hasProtoAccessor) { |
| assert.equal([].__proto__, Array.prototype); |
| } else { |
| assert(!('__proto__' in Object.prototype)); |
| } |
| |
| var hasProtoMutator = require('has-proto/mutator'); |
| var obj = {}; |
| assert('toString' in obj); |
| |
| obj.__proto__ = null; |
| if (hasProtoMutator) { |
| assert(!('toString' in obj)); |
| } else { |
| assert('toString' in obj); |
| assert.equal(obj.__proto__, null); |
| } |
| ``` |
| |
| ## Tests |
| Simply clone the repo, `npm install`, and run `npm test` |
| |
| [package-url]: https://npmjs.org/package/has-proto |
| [npm-version-svg]: https://versionbadg.es/inspect-js/has-proto.svg |
| [deps-svg]: https://david-dm.org/inspect-js/has-proto.svg |
| [deps-url]: https://david-dm.org/inspect-js/has-proto |
| [dev-deps-svg]: https://david-dm.org/inspect-js/has-proto/dev-status.svg |
| [dev-deps-url]: https://david-dm.org/inspect-js/has-proto#info=devDependencies |
| [npm-badge-png]: https://nodei.co/npm/has-proto.png?downloads=true&stars=true |
| [license-image]: https://img.shields.io/npm/l/has-proto.svg |
| [license-url]: LICENSE |
| [downloads-image]: https://img.shields.io/npm/dm/has-proto.svg |
| [downloads-url]: https://npm-stat.com/charts.html?package=has-proto |
| [codecov-image]: https://codecov.io/gh/inspect-js/has-proto/branch/main/graphs/badge.svg |
| [codecov-url]: https://app.codecov.io/gh/inspect-js/has-proto/ |
| [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/has-proto |
| [actions-url]: https://github.com/inspect-js/has-proto/actions |