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Is regenerator-runtime ESM-only? Can you require() it?

Runtime for Regenerator-compiled generator and async functions.

Last verified Sep 9, 2026 against regenerator-runtime@0.14.1. Markdown · JSON

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

regenerator-runtime ships CommonJS only. require("regenerator-runtime") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "regenerator-runtime" 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("regenerator-runtime") 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 regeneratorRuntime from "regenerator-runtime"; then destructure. Named imports only work when Node.js can statically detect the exports.
  3. TypeScript: npm install -D @types/regenerator-runtime
Latest
0.14.1 (Dec 15, 2023)
Module format
CommonJS
Last CommonJS version
0.14.1
TypeScript types
@types/regenerator-runtime
Node engines
not declared
Weekly downloads
60.3M
License
MIT

Does regenerator-runtime@0.14.1 actually load? Runtime test results

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

Runtimerequire("regenerator-runtime")import "regenerator-runtime"
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 regenerator-runtime

ES modules (import)

import regeneratorRuntime from "regenerator-runtime";

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 regeneratorRuntime = require("regenerator-runtime");

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 (31 versions; the newest 31 shown).

VersionsFormatFirst published
0.9.0 – 0.14.1CommonJSMay 2, 2016

Frequently asked

Is regenerator-runtime ESM-only?

regenerator-runtime@0.14.1 is a CommonJS package. regenerator-runtime ships CommonJS only. require("regenerator-runtime") works on every Node.js version we test (18, 20, 22, 24 and 26) and in Bun. import "regenerator-runtime" 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 regenerator-runtime with ES module syntax?

Yes. import regeneratorRuntime from "regenerator-runtime" 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 regenerator-runtime work in Bun?

Yes. import "regenerator-runtime" loaded successfully in Bun 1.4.0 on Sep 9, 2026.

Does regenerator-runtime ship TypeScript types?

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

Links

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