# is-builtin-module

> Check if a string matches the name of a Node.js builtin module

Latest version **5.0.0** (published 2025-02-27) · MIT license · 0 weekly downloads

> **Better alternative:** See documentation for alternatives (https://github.com/AikidoSec/module-replacements/blob/main/docs/is-builtin-module)

## Install

```sh
npm install is-builtin-module
pnpm add is-builtin-module
yarn add is-builtin-module
bun add is-builtin-module
```

## Health

**Score 40/100 (D)** — status: maintenance-mode.

Positive: has types; esm support; no vulnerabilities; high quality score.

Warnings: low downloads.

Negative: stale; low maintenance score.

## Facts

| | |
|---|---|
| Version | 5.0.0 |
| Published | 2025-02-27 |
| First published | 2015-05-04 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM |
| Node | >=18.20 |
| Dependencies | 1 |
| Unpacked size | 3.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 62 |
| Author | Sindre Sorhus |
| Maintainers | sindresorhus |
| Keywords | builtin, built-in, builtins, node, modules, core, bundled, list, array, names, is, detect, check, match |

## Links

- npm: https://www.npmjs.com/package/is-builtin-module
- Repository: https://github.com/sindresorhus/is-builtin-module
- Homepage: https://github.com/sindresorhus/is-builtin-module#readme
- Issues: https://github.com/sindresorhus/is-builtin-module/issues
- Funding: https://github.com/sponsors/sindresorhus
- npm.io page: https://npm.io/package/is-builtin-module

## Dependencies (1)

- [builtin-modules](https://npm.io/package/builtin-modules.md) ^5.0.0

## Alternatives

- [memory-cache](https://npm.io/package/memory-cache.md) — 795.0K weekly downloads
- [@httptoolkit/proxy-agent](https://npm.io/package/@httptoolkit/proxy-agent.md) — 11.2K weekly downloads
- [express-cache-controller](https://npm.io/package/express-cache-controller.md) — 5.3K weekly downloads
- [http-cache-middleware](https://npm.io/package/http-cache-middleware.md) — 4.5K weekly downloads
- [cache2](https://npm.io/package/cache2.md) — 1.5K weekly downloads

## Recent versions

- 5.0.0 (latest) — 2025-02-27
- 4.0.0 — 2024-04-30
- 3.2.1 — 2023-01-31
- 3.2.0 — 2022-07-31
- 3.1.0 — 2021-04-21
- 3.0.0 — 2018-09-19
- 2.0.0 — 2017-11-15
- 1.0.0 — 2015-05-04

## README

# is-builtin-module

> Check if a string matches the name of a Node.js builtin module

Note that this matches based a [static list of modules](https://github.com/sindresorhus/builtin-modules) from the latest Node.js version. If you want to check for a module in the current Node.js, use the core [`isBuiltin`](https://nodejs.org/api/module.html#moduleisbuiltinmodulename) method.

## Install

```sh
npm install is-builtin-module
```

## Usage

```js
import isBuiltinModule from 'is-builtin-module';

isBuiltinModule('fs');
//=> true

isBuiltinModule('fs/promises');
//=> true

isBuiltinModule('node:fs/promises');
//=> true

isBuiltinModule('unicorn');
//=> false
```

## Related

- [builtin-modules](https://github.com/sindresorhus/builtin-modules) - A static list of the Node.js builtin modules from the latest Node.js version

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_Source: https://npm.io/package/is-builtin-module · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._