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Is whatwg-mimetype ESM-only? Can you require() it?

Parses, serializes, and manipulates MIME types, according to the WHATWG MIME Sniffing Standard

Last verified Sep 9, 2026 against whatwg-mimetype@5.0.0. JSON

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

whatwg-mimetype ships CommonJS only. require("whatwg-mimetype") works everywhere. import "whatwg-mimetype" 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
5.0.0 (Jan 20, 2026)
Module format
CommonJS
Last CommonJS version
5.0.0
TypeScript types
@types/whatwg-mimetype
Node engines
>=20
Weekly downloads
112.7M
License
MIT

Does whatwg-mimetype@5.0.0 actually load? Runtime test results

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

Runtimerequire("whatwg-mimetype")import "whatwg-mimetype"
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 whatwg-mimetype

ES modules (import)

import whatwgMimetype from "whatwg-mimetype";

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 whatwgMimetype = require("whatwg-mimetype");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (8 versions; the newest 8 shown).

VersionsFormatFirst published
2.0.0 – 5.0.0CommonJSDec 10, 2017

Frequently asked

Is whatwg-mimetype ESM-only?

whatwg-mimetype@5.0.0 is a CommonJS package. whatwg-mimetype ships CommonJS only. require("whatwg-mimetype") works everywhere. import "whatwg-mimetype" 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 whatwg-mimetype with ES module syntax?

Yes. import whatwgMimetype from "whatwg-mimetype" 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 whatwg-mimetype work in Bun?

Yes. import "whatwg-mimetype" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does whatwg-mimetype ship TypeScript types?

Not bundled. Install the community types with "npm install -D @types/whatwg-mimetype".

Links

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