|                                                                       |  | # get-intrinsic <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
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[![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
```jsvar GetIntrinsic = require('get-intrinsic');var assert = require('assert');
// static methodsassert.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 methodsvar 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 featuresdelete JSON.parse; // to simulate a real intrinsic that is missing in the environmentassert.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
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