Spaces:
Configuration error
Configuration error
# 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 | |