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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. 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 you can require() on every Node.js version, including 18 and older, is 7.3.0, published Apr 22, 2025.

On Node.js 20.19+, 22.12+ and every newer release, require("parse5") works anyway: Node can load synchronous ES modules through require(). Verified on Node 20, 22, 24, 26. Node.js 18 and older still fail with ERR_REQUIRE_ESM.

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✓ works✓ works

How to import parse5

ES modules (import)

import parse5 from "parse5";

CommonJS (require)

// Node.js 20.19+ / 22.12+ / newer (package has no top-level await):
const parse5 = require("parse5");

// Any Node.js version:
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 (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 you can require() on every Node.js version, including 18 and older, 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?

Use a dynamic import: const mod = await import("parse5"). On Node.js 20.19+, 22.12+ and newer, a plain require("parse5") also works for ESM packages that do not use top-level await. Alternatively pin parse5@7.3.0.

Does parse5 work in Bun?

Yes. import "parse5" loaded successfully in Bun 1.4 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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