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Is eslint-loader ESM-only? Can you require() it?

A ESlint loader for webpack

Last verified Sep 9, 2026 against eslint-loader@4.0.2. JSON

CommonJS CommonJS — require() works on every Node.js version

eslint-loader ships CommonJS only. require("eslint-loader") works everywhere. import "eslint-loader" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Latest
4.0.2 (Apr 24, 2020)
Module format
CommonJS
Last CommonJS version
4.0.2
TypeScript types
None
Node engines
>= 10.13.0
Weekly downloads
740K
License
MIT

Deprecated: This loader has been deprecated. Please use eslint-webpack-plugin

Does eslint-loader@4.0.2 actually load? Runtime test results

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

Runtimerequire("eslint-loader")import "eslint-loader"
Node.js 18✓ works✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4✓ works✓ works

How to import eslint-loader

ES modules (import)

import eslintLoader from "eslint-loader";

Named imports from a CommonJS package only work when Node.js can statically detect them. If a named import fails, use the default import and destructure.

CommonJS (require)

const eslintLoader = require("eslint-loader");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (50 versions; the newest 50 shown).

VersionsFormatFirst published
0.1.0 – 4.0.2CommonJSDec 5, 2014

Frequently asked

Is eslint-loader ESM-only?

eslint-loader@4.0.2 is a CommonJS package. eslint-loader ships CommonJS only. require("eslint-loader") works everywhere. import "eslint-loader" also works because Node.js and Bun can import CommonJS from ES modules, but only the default export is guaranteed; named imports depend on Node's static analysis of the module.

Can I import eslint-loader with ES module syntax?

Yes. import eslintLoader from "eslint-loader" 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 eslint-loader work in Bun?

Yes. import "eslint-loader" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does eslint-loader ship TypeScript types?

No. eslint-loader ships no type declarations and there is no @types package for it.

Links

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