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

Wrapper library for directory and file watching.

Last verified Sep 9, 2026 against watchpack@2.5.2. Markdown · JSON

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

watchpack ships CommonJS only. require("watchpack") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.13.0. import "watchpack" 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.

What to do

  1. require("watchpack") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.13.0.
  2. From ES modules use the default import: import watchpack from "watchpack"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: types are bundled; install nothing extra.
Latest
2.5.2 (Jun 11, 2026)
Module format
CommonJS
Last CommonJS version
2.5.2
TypeScript types
Bundled
Node engines
>=10.13.0
Weekly downloads
49.5M
License
MIT

Does watchpack@2.5.2 actually load? Runtime test results

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

Runtimerequire("watchpack")import "watchpack"
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 1.4.0✓ works✓ works

How to import watchpack

ES modules (import)

import watchpack from "watchpack";

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 watchpack = require("watchpack");

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 (45 versions; the newest 45 shown).

VersionsFormatFirst published
0.1.0 – 2.5.2CommonJSOct 9, 2014

Frequently asked

Is watchpack ESM-only?

watchpack@2.5.2 is a CommonJS package. watchpack ships CommonJS only. require("watchpack") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >=10.13.0. import "watchpack" 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 watchpack with ES module syntax?

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

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

Does watchpack ship TypeScript types?

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

Links

Other commonjs packages

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