df4e06385a
Initial setup of project dependencies including axios, express, dotenv, and other supporting packages. Added configuration files and documentation for project setup and usage.
72 lines
2.7 KiB
Markdown
72 lines
2.7 KiB
Markdown
# get-intrinsic <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
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[![github actions][actions-image]][actions-url]
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[![coverage][codecov-image]][codecov-url]
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[![dependency status][deps-svg]][deps-url]
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[![dev dependency status][dev-deps-svg]][dev-deps-url]
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[![License][license-image]][license-url]
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[![Downloads][downloads-image]][downloads-url]
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[![npm badge][npm-badge-png]][package-url]
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Get and robustly cache all JS language-level intrinsics at first require time.
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See the syntax described [in the JS spec](https://tc39.es/ecma262/#sec-well-known-intrinsic-objects) for reference.
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## Example
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```js
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var GetIntrinsic = require('get-intrinsic');
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var assert = require('assert');
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// static methods
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assert.equal(GetIntrinsic('%Math.pow%'), Math.pow);
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assert.equal(Math.pow(2, 3), 8);
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assert.equal(GetIntrinsic('%Math.pow%')(2, 3), 8);
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delete Math.pow;
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assert.equal(GetIntrinsic('%Math.pow%')(2, 3), 8);
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// instance methods
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var arr = [1];
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assert.equal(GetIntrinsic('%Array.prototype.push%'), Array.prototype.push);
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assert.deepEqual(arr, [1]);
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arr.push(2);
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assert.deepEqual(arr, [1, 2]);
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GetIntrinsic('%Array.prototype.push%').call(arr, 3);
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assert.deepEqual(arr, [1, 2, 3]);
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delete Array.prototype.push;
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GetIntrinsic('%Array.prototype.push%').call(arr, 4);
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assert.deepEqual(arr, [1, 2, 3, 4]);
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// missing features
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delete JSON.parse; // to simulate a real intrinsic that is missing in the environment
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assert.throws(() => GetIntrinsic('%JSON.parse%'));
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assert.equal(undefined, GetIntrinsic('%JSON.parse%', true));
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```
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## Tests
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Simply clone the repo, `npm install`, and run `npm test`
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## Security
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Please email [@ljharb](https://github.com/ljharb) or see https://tidelift.com/security if you have a potential security vulnerability to report.
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[package-url]: https://npmjs.org/package/get-intrinsic
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[npm-version-svg]: https://versionbadg.es/ljharb/get-intrinsic.svg
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[deps-svg]: https://david-dm.org/ljharb/get-intrinsic.svg
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[deps-url]: https://david-dm.org/ljharb/get-intrinsic
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[dev-deps-svg]: https://david-dm.org/ljharb/get-intrinsic/dev-status.svg
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[dev-deps-url]: https://david-dm.org/ljharb/get-intrinsic#info=devDependencies
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[npm-badge-png]: https://nodei.co/npm/get-intrinsic.png?downloads=true&stars=true
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[license-image]: https://img.shields.io/npm/l/get-intrinsic.svg
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[license-url]: LICENSE
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[downloads-image]: https://img.shields.io/npm/dm/get-intrinsic.svg
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[downloads-url]: https://npm-stat.com/charts.html?package=get-intrinsic
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[codecov-image]: https://codecov.io/gh/ljharb/get-intrinsic/branch/main/graphs/badge.svg
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[codecov-url]: https://app.codecov.io/gh/ljharb/get-intrinsic/
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[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/get-intrinsic
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[actions-url]: https://github.com/ljharb/get-intrinsic/actions
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