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canirequire › Dual (CommonJS + ESM) › minizlib

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

A small fast zlib stream built on [minipass](http://npm.im/minipass) and Node.js's zlib binding.

Last verified Sep 9, 2026 against minizlib@3.1.0. Markdown · JSON

Dual (CommonJS + ESM) Dual package — require() works on every Node.js version we test; import works too

minizlib publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("minizlib") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 18. import "minizlib" works alongside it.

What to do

  1. Nothing to change. require("minizlib") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 18. import * as minizlib from "minizlib" works alongside it; use named imports for what the ESM entry exports.
  2. TypeScript: types are bundled; install nothing extra.
Latest
3.1.0 (Sep 21, 2025)
Module format
Dual (CommonJS + ESM)
Last CommonJS version
3.1.0
Native ESM since
3.0.0
TypeScript types
Bundled
Node engines
>= 18
Weekly downloads
56.7M
License
MIT

Does minizlib@3.1.0 actually load? Runtime test results

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

Runtimerequire("minizlib")import "minizlib"
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 minizlib

ES modules (import)

import * as minizlib from "minizlib";

Namespace import shown because the ESM entry may have no default export; use named imports for what it exports.

CommonJS (require)

const minizlib = require("minizlib");

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 (23 versions; the newest 23 shown).

VersionsFormatFirst published
3.0.0 – 3.1.0Dual (CommonJS + ESM)Mar 19, 2024
0.0.1 – 2.1.2CommonJSMar 28, 2017

Frequently asked

Is minizlib ESM-only?

minizlib@3.1.0 ships CommonJS and ESM builds. minizlib publishes both a CommonJS entry and a native ESM entry (ESM added in 3.0.0). require("minizlib") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 18. import "minizlib" works alongside it.

Can I require minizlib?

Yes. minizlib ships a CommonJS entry alongside the native ESM entry. require("minizlib") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. The package declares Node.js >= 18.

Does minizlib work in Bun?

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

Does minizlib ship TypeScript types?

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

Links

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