is-core-module
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The JavaScript npm package "is-core-module" is a succinct tool that allows developers to determine if a specified module is a Node.js core module. It optionally accepts a node version to check against, but if none is provided, it defaults to the current version of Node.js. This feature makes it versatile as it aids developers in quickly verifying whether they are indeed using a core Node.js module or not.
Using the "is-core-module" npm package is quite straightforward. After installing the package using npm (Node Package Manager) install command, it can be required in your JavaScript code and used directly. Here's a short example of how you can use it in code:
var isCore = require('is-core-module');
var assert = require('assert');
// Check if 'fs' is a core module
assert(isCore('fs')); // Returns true if 'fs' is a core module
// Check if 'butts' is a core module
assert(!isCore('butts')); // Returns false since 'butts' is not a core module
In the example above, the 'isCore' function is used to check if the 'fs' module is a core Node.js module. It should return true. The function will return false for 'butts' since it is not a core Node.js module.
The official "is-core-module" docs are contained within the README file of the module's GitHub repository at inspect-js/is-core-module. The README provides important details on the functionality of the package, details on how to use it, and a test example. Furthermore, the README also contains useful links for the npm package downloads, dependency status, and development dependency status among others.