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Is parse5 ESM-only? Can you require() it?

HTML parser and serializer.

Last verified Sep 9, 2026 against parse5@8.0.1. Markdown · JSON

ESM-only ESM-only since 8.0.0 — last CommonJS version is 7.3.0

parse5 dropped its CommonJS build in 8.0.0 (July 2025). The last version with a plain require()-able CommonJS entry is 7.3.0, published Apr 22, 2025.

On Node.js 20.19+, 22.12+ and newer, require("parse5") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. On Node.js 18, which has no require(esm), require("parse5") fails with ERR_REQUIRE_ESM.

What to do

  1. On Node.js 20.19+, 22.12+ and newer, require("parse5") 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 parse5 = await import("parse5"). That works on every Node.js version the package supports.
  3. If you need a synchronous require() or run Node.js 18: npm install parse5@7.3.0, the last CommonJS release (published Apr 22, 2025).
  4. TypeScript: types are bundled; install nothing extra.
Latest
8.0.1 (Apr 19, 2026)
Module format
ESM-only
Last CommonJS version
7.3.0
ESM-only since
8.0.0 (Jul 9, 2025)
TypeScript types
Bundled
Node engines
not declared
Weekly downloads
106.7M
License
MIT

Does parse5@8.0.1 actually load? Runtime test results

Installed and executed on Sep 9, 2026 with require("parse5") from a CommonJS file and import "parse5" from an ES module.

Runtimerequire("parse5")import "parse5"
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 parse5

ES modules (import)

import * as parse5 from "parse5";

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 parse5 = require("parse5");

// Any Node.js version the package supports, from an async function:
async function main() {
  const parse5 = await import("parse5");
}

// Or pin the last CommonJS release:
// npm install parse5@7.3.0

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 (60 versions; the newest 60 shown).

VersionsFormatFirst published
8.0.0 – 8.0.1ESM-onlyJul 9, 2025
7.0.0 – 7.3.0Dual (CommonJS + ESM)Apr 20, 2022
0.5.0 – 6.0.1CommonJSJul 3, 2013

Frequently asked

Is parse5 ESM-only?

parse5@8.0.1 is ESM-only. parse5 dropped its CommonJS build in 8.0.0 (July 2025). The last version with a plain require()-able CommonJS entry is 7.3.0, published Apr 22, 2025.

Which version of parse5 still supports CommonJS / require()?

7.3.0 is the last version of parse5 with a CommonJS build. Install it with "npm install parse5@7.3.0". Every version from 8.0.0 on is ESM-only.

How do I use parse5 from a CommonJS file?

From a CommonJS file, use a dynamic import inside an async function: const parse5 = await import("parse5"). That works on every Node.js version the package supports. On Node.js 20.19+, 22.12+ and newer, require("parse5") works with the latest version: Node.js loads synchronous ES modules through require(). Verified on Node.js 20, 22, 24 and 26. Alternatively pin parse5@7.3.0.

Does parse5 work in Bun?

Yes. import "parse5" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does parse5 ship TypeScript types?

Yes. parse5 bundles its own type declarations; no @types package is needed.

Links

Other esm-only packages

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