# Is codelyzer ESM-only? Can you require() it?

> codelyzer@6.0.2 declares a CommonJS entry, but require() fails at runtime. CommonJS on paper — require() failed in our runtime test.

Linting for Angular applications, following angular.io/styleguide.

Last verified Sep 9, 2026 against codelyzer@6.0.2.

codelyzer declares a CommonJS entry only, but require("codelyzer") failed on every Node.js version in our probe: ERR_PACKAGE_PATH_NOT_EXPORTED. import "codelyzer" resolves to the same file, so it fails the same way. That usually means a missing peer dependency, a browser-only global, or a package that is not meant to be loaded directly; see the runtime table below.

## What to do

1. require("codelyzer") failed in our probe on every Node.js version (ERR_PACKAGE_PATH_NOT_EXPORTED); check the package README for peer dependencies or setup before relying on it.
2. From ES modules use the default import: import codelyzer from "codelyzer"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for codelyzer; declare the module yourself if you need them.

## Facts

- Latest: 6.0.2 (May 3, 2021)
- Module format: CommonJS
- Last CommonJS version: 6.0.2
- TypeScript types: none
- Node engines: not declared
- Weekly downloads: 394K
- License: MIT

## Runtime test results for codelyzer@6.0.2

Installed and executed on Sep 9, 2026 with require("codelyzer") from a CommonJS file and import "codelyzer" from an ES module.

| Runtime | require("codelyzer") | import "codelyzer" |
|---|---|---|
| Node.js 18 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 20 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 22 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 24 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Node.js 26 | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) | fails (ERR_PACKAGE_PATH_NOT_EXPORTED) |
| Bun 1.4.0 | fails (Error) | fails (Error) |

## How to import codelyzer

ES modules:

```js
import codelyzer from "codelyzer";
```

CommonJS:

```js
// require("codelyzer") failed in our probe on every Node.js version we test (ERR_PACKAGE_PATH_NOT_EXPORTED); see the runtime table.
const codelyzer = require("codelyzer");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (56 versions; the newest 56 shown).

| Versions | Format | First published |
|---|---|---|
| 0.0.0 – 6.0.2 | CommonJS | Mar 24, 2016 |

## Frequently asked

**Is codelyzer ESM-only?**

codelyzer@6.0.2 declares a CommonJS entry, but require() fails at runtime. codelyzer declares a CommonJS entry only, but require("codelyzer") failed on every Node.js version in our probe: ERR_PACKAGE_PATH_NOT_EXPORTED. import "codelyzer" resolves to the same file, so it fails the same way. That usually means a missing peer dependency, a browser-only global, or a package that is not meant to be loaded directly; see the runtime table below.

**Can I require codelyzer?**

Not in practice. codelyzer declares a CommonJS entry, but require("codelyzer") failed on every Node.js version in our probe: ERR_PACKAGE_PATH_NOT_EXPORTED. Check the package README for peer dependencies or setup before relying on it.

**Can I import codelyzer with ES module syntax?**

Yes. import codelyzer from "codelyzer" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does codelyzer work in Bun?**

Importing codelyzer failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find module 'typescript/lib/typescript' from '/Users/boat/Projects/top-seo/data/probe-work/codelyzer/node_modules/codelyzer/importDestructuringSpacingRule.js'

**Does codelyzer ship TypeScript types?**

No. codelyzer ships no type declarations and there is no @types package for it.

## Links

- [codelyzer on npm](https://www.npmjs.com/package/codelyzer)
- [Source repository](https://github.com/mgechev/codelyzer)
- [HTML version](https://canirequire.com/package/codelyzer/)
- [JSON version](https://canirequire.com/package/codelyzer.json)

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