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

Create simple HTTP ETags

Last verified Sep 9, 2026 against etag@1.8.1. JSON

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

etag ships CommonJS only. require("etag") works everywhere. import "etag" 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
1.8.1 (Sep 13, 2017)
Module format
CommonJS
Last CommonJS version
1.8.1
TypeScript types
@types/etag
Node engines
>= 0.6
Weekly downloads
100.0M
License
MIT

Does etag@1.8.1 actually load? Runtime test results

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

Runtimerequire("etag")import "etag"
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 etag

ES modules (import)

import etag from "etag";

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 etag = require("etag");

Module format by version

Derived from the type, main and exports fields of every stable release on npm (14 versions; the newest 14 shown).

VersionsFormatFirst published
1.0.0 – 1.8.1CommonJSMay 18, 2014

Frequently asked

Is etag ESM-only?

etag@1.8.1 is a CommonJS package. etag ships CommonJS only. require("etag") works everywhere. import "etag" 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 etag with ES module syntax?

Yes. import etag from "etag" 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 etag work in Bun?

Yes. import "etag" loaded successfully in Bun 1.4 on Sep 9, 2026.

Does etag ship TypeScript types?

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

Links

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