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| # get-intrinsic <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] | |
| Get and robustly cache all JS language-level intrinsics at first require time. | |
| See the syntax described [in the JS spec](https://tc39.es/ecma262/#sec-well-known-intrinsic-objects) for reference. | |
| ## Example | |
| ```js | |
| var GetIntrinsic = require('get-intrinsic'); | |
| var assert = require('assert'); | |
| // static methods | |
| assert.equal(GetIntrinsic('%Math.pow%'), Math.pow); | |
| assert.equal(Math.pow(2, 3), 8); | |
| assert.equal(GetIntrinsic('%Math.pow%')(2, 3), 8); | |
| delete Math.pow; | |
| assert.equal(GetIntrinsic('%Math.pow%')(2, 3), 8); | |
| // instance methods | |
| var arr = [1]; | |
| assert.equal(GetIntrinsic('%Array.prototype.push%'), Array.prototype.push); | |
| assert.deepEqual(arr, [1]); | |
| arr.push(2); | |
| assert.deepEqual(arr, [1, 2]); | |
| GetIntrinsic('%Array.prototype.push%').call(arr, 3); | |
| assert.deepEqual(arr, [1, 2, 3]); | |
| delete Array.prototype.push; | |
| GetIntrinsic('%Array.prototype.push%').call(arr, 4); | |
| assert.deepEqual(arr, [1, 2, 3, 4]); | |
| // missing features | |
| delete JSON.parse; // to simulate a real intrinsic that is missing in the environment | |
| assert.throws(() => GetIntrinsic('%JSON.parse%')); | |
| assert.equal(undefined, GetIntrinsic('%JSON.parse%', true)); | |
| ``` | |
| ## Tests | |
| Simply clone the repo, `npm install`, and run `npm test` | |
| ## Security | |
| Please email [@ljharb](https://github.com/ljharb) or see https://tidelift.com/security if you have a potential security vulnerability to report. | |
| [package-url]: https://npmjs.org/package/get-intrinsic | |
| [npm-version-svg]: https://versionbadg.es/ljharb/get-intrinsic.svg | |
| [deps-svg]: https://david-dm.org/ljharb/get-intrinsic.svg | |
| [deps-url]: https://david-dm.org/ljharb/get-intrinsic | |
| [dev-deps-svg]: https://david-dm.org/ljharb/get-intrinsic/dev-status.svg | |
| [dev-deps-url]: https://david-dm.org/ljharb/get-intrinsic#info=devDependencies | |
| [npm-badge-png]: https://nodei.co/npm/get-intrinsic.png?downloads=true&stars=true | |
| [license-image]: https://img.shields.io/npm/l/get-intrinsic.svg | |
| [license-url]: LICENSE | |
| [downloads-image]: https://img.shields.io/npm/dm/get-intrinsic.svg | |
| [downloads-url]: https://npm-stat.com/charts.html?package=get-intrinsic | |
| [codecov-image]: https://codecov.io/gh/ljharb/get-intrinsic/branch/main/graphs/badge.svg | |
| [codecov-url]: https://app.codecov.io/gh/ljharb/get-intrinsic/ | |
| [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/get-intrinsic | |
| [actions-url]: https://github.com/ljharb/get-intrinsic/actions | |