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Is htmlparser2 ESM-only? Can you require() it?

Fast & forgiving HTML/XML parser

Last verified Sep 9, 2026 against htmlparser2@12.0.0. Markdown · JSON

ESM-only ESM-only since 11.0.0 — last CommonJS version is 10.1.0

htmlparser2 dropped its CommonJS build in 11.0.0 (March 2026). The last version with a plain require()-able CommonJS entry is 10.1.0, published Jan 21, 2026.

On Node.js 20.19+, 22.12+ and newer, require("htmlparser2") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Node.js 18 has no require(esm), and htmlparser2@12.0.0 declares Node.js >=20.19.0, so 18 is outside its supported range anyway.

htmlparser2@12.0.0 declares engines ">=20.19.0", so Node.js 18 is outside its supported range regardless of module format.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("htmlparser2") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26.
  2. From a CommonJS file, use a dynamic import inside an async function: const htmlparser2 = await import("htmlparser2"). That works on every Node.js version the package supports (>=20.19.0).
  3. If you need a synchronous require() or run Node.js 18: npm install htmlparser2@10.1.0, the last CommonJS release (published Jan 21, 2026).
  4. htmlparser2@12.0.0 declares engines ">=20.19.0", so Node.js 18 is unsupported regardless: upgrade Node.js or pin an older release.
  5. TypeScript: types are bundled; install nothing extra.
Latest
12.0.0 (Mar 20, 2026)
Module format
ESM-only
Last CommonJS version
10.1.0
ESM-only since
11.0.0 (Mar 19, 2026)
TypeScript types
Bundled
Node engines
>=20.19.0
Weekly downloads
64.7M
License
MIT

Does htmlparser2@12.0.0 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("htmlparser2") from a CommonJS file and import "htmlparser2" from an ES module.

Runtimerequire("htmlparser2")import "htmlparser2"
Node.js 18✗ failsERR_REQUIRE_ESM✓ works
Node.js 20✓ works✓ works
Node.js 22✓ works✓ works
Node.js 24✓ works✓ works
Node.js 26✓ works✓ works
Bun 1.4.0✓ works✓ works

How to import htmlparser2

ES modules (import)

import * as htmlparser2 from "htmlparser2";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

// Node.js 20.19+, 22.12+ and newer (verified):
const htmlparser2 = require("htmlparser2");

// Any Node.js version the package supports (>=20.19.0), from an async function:
async function main() {
  const htmlparser2 = await import("htmlparser2");
}

// Or pin the last CommonJS release:
// npm install htmlparser2@10.1.0

Module format by version

Derived from the type, main and exports fields of every stable release on npm, corrected where a runtime test of that version contradicted them (80 versions; the newest 60 shown).

VersionsFormatFirst published
11.0.0 – 12.0.0ESM-onlyMar 19, 2026
8.0.0 – 10.1.0Dual (CommonJS + ESM)Apr 23, 2022
2.5.1 – 7.2.0CommonJSJan 9, 2013

Frequently asked

Is htmlparser2 ESM-only?

htmlparser2@12.0.0 is ESM-only. htmlparser2 dropped its CommonJS build in 11.0.0 (March 2026). The last version with a plain require()-able CommonJS entry is 10.1.0, published Jan 21, 2026.

Which version of htmlparser2 still supports CommonJS / require()?

10.1.0 is the last version of htmlparser2 with a CommonJS build. Install it with "npm install htmlparser2@10.1.0". Every version from 11.0.0 on is ESM-only.

How do I use htmlparser2 from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const htmlparser2 = await import("htmlparser2"). That works on every Node.js version the package supports (>=20.19.0). On Node.js 20.19+, 22.12+ and newer, require("htmlparser2") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin htmlparser2@10.1.0.

Does htmlparser2 work in Bun?

Yes. import "htmlparser2" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does htmlparser2 ship TypeScript types?

Yes. htmlparser2 bundles its own type declarations; no @types package is needed.

Links

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