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

pipe streams together and close all of them if one of them closes

Last verified Sep 9, 2026 against pump@3.0.4. Markdown · JSON

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

pump ships CommonJS only. require("pump") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "pump" 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("pump") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun.
  2. From ES modules use the default import: import pump from "pump"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: npm install -D @types/pump
Latest
3.0.4 (Feb 28, 2026)
Module format
CommonJS
Last CommonJS version
3.0.4
TypeScript types
@types/pump
Node engines
not declared
Weekly downloads
78.6M
License
MIT

Does pump@3.0.4 actually load? Runtime test results

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

Runtimerequire("pump")import "pump"
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 pump

ES modules (import)

import pump from "pump";

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 pump = require("pump");

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 (29 versions; the newest 29 shown).

VersionsFormatFirst published
0.1.0 – 3.0.4CommonJSAug 14, 2013

Frequently asked

Is pump ESM-only?

pump@3.0.4 is a CommonJS package. pump ships CommonJS only. require("pump") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "pump" 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 pump with ES module syntax?

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

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

Does pump ship TypeScript types?

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

Links

Other commonjs packages

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