You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
2.7 KiB
72 lines
2.7 KiB
4 weeks ago
|
# 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
|