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

Minimal async jobs utility library, with streams support

Last verified Sep 9, 2026 against asynckit@0.5.0. Markdown · JSON

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

asynckit ships CommonJS only. require("asynckit") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "asynckit" 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("asynckit") 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 asynckit from "asynckit"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: no types are available for asynckit; declare the module yourself if you need them.
Latest
0.5.0 (Dec 18, 2025)
Module format
CommonJS
Last CommonJS version
0.5.0
TypeScript types
None
Node engines
not declared
Weekly downloads
85.9M
License
MIT

Does asynckit@0.5.0 actually load? Runtime test results

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

Runtimerequire("asynckit")import "asynckit"
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 asynckit

ES modules (import)

import asynckit from "asynckit";

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 asynckit = require("asynckit");

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 (5 versions; the newest 5 shown).

VersionsFormatFirst published
0.1.0 – 0.5.0CommonJSMay 18, 2016

Frequently asked

Is asynckit ESM-only?

asynckit@0.5.0 is a CommonJS package. asynckit ships CommonJS only. require("asynckit") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "asynckit" 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 asynckit with ES module syntax?

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

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

Does asynckit ship TypeScript types?

No. asynckit ships no type declarations and there is no @types package for it.

Links

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