canirequire › CommonJS › mz
Is mz ESM-only? Can you require() it?
modernize node.js to current ECMAScript standards
Last verified Sep 9, 2026 against mz@2.7.0. JSON
CommonJS CommonJS — require() works on every Node.js version
mz ships CommonJS only. require("mz") works everywhere. import "mz" 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.
Does mz@2.7.0 actually load? Runtime test results
Installed and executed on Sep 9, 2026 with require("mz") from a CommonJS file and import "mz" from an ES module.
| Runtime | require("mz") | import "mz" |
|---|---|---|
| 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 mz
ES modules (import)
import mz from "mz";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 mz = require("mz");Module format by version
Derived from the type, main and exports fields of every stable release on npm (22 versions; the newest 22 shown).
| Versions | Format | First published |
|---|---|---|
| 0.1.1 – 2.7.0 | CommonJS | May 8, 2014 |
Frequently asked
Is mz ESM-only?
mz@2.7.0 is a CommonJS package. mz ships CommonJS only. require("mz") works everywhere. import "mz" 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 mz with ES module syntax?
Yes. import mz from "mz" 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 mz work in Bun?
Yes. import "mz" loaded successfully in Bun 1.4 on Sep 9, 2026.
Does mz ship TypeScript types?
Not bundled. Install the community types with "npm install -D @types/mz".
Links
Other commonjs packages
- debug 4.4.3CommonJS
- semver 7.8.5CommonJS
- ms 2.1.3CommonJS
- picomatch 4.0.7CommonJS
- ajv 8.20.0CommonJS
- source-map 0.8.0CommonJS
- react-is 19.2.8CommonJS
- readable-stream 4.7.0CommonJS
Similar popularity
- sisteransi 2.0.0ESM-only
- babel-preset-jest 30.5.0CommonJS
- object.fromentries 2.0.8CommonJS
- thenify 3.3.1CommonJS
- abbrev 5.0.0CommonJS
- redent 4.0.0ESM-only
- jest-environment-node 30.5.1Dual
- victory-vendor 37.3.6Dual