| .. | ||
| .github | ||
| test | ||
| .eslintrc | ||
| .travis.yml | ||
| CHANGELOG.md | ||
| core.json | ||
| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
is-core-module 
Is this specifier a node.js core module? Optionally provide a node version to check; defaults to the current node version.
Example
var isCore = require('is-core-module');
var assert = require('assert');
assert(isCore('fs'));
assert(!isCore('butts'));
Tests
Clone the repo, npm install, and run npm test