rollup-regenerator-runtime

6.23.1 verified Mon Apr 27 auth: no javascript

Provides the regenerator runtime as a self-contained module for bundling with Rollup. Version 6.23.1 is the latest stable release. It replaces the default babel-runtime regenerator import with a local copy, avoiding external dependencies when using async/await and generators in libraries compiled with Rollup. Key differentiator: allows bundling regenerator runtime without requiring the full babel-runtime package, reducing bundle size and avoiding issues with Rollup's module resolution.

Common errors

error Module not found: Can't resolve 'regenerator-runtime' in ... ↓

cause Babel transforms async/await but still imports from default 'regenerator-runtime' instead of 'rollup-regenerator-runtime'.

fix

Set moduleName to 'rollup-regenerator-runtime' in transform-runtime options and import 'rollup-regenerator-runtime' in your entry file.

error regeneratorRuntime is not defined ↓

cause The global regeneratorRuntime may not have been registered before async/await code runs.

fix

Ensure import 'rollup-regenerator-runtime'; is placed at the top of your entry file, before any async functions.

Warnings

gotcha The module must be imported (or required) as a side effect; it does not export anything. CommonJS require returns an empty object. ↓

fix Use `import 'rollup-regenerator-runtime';` or `require('rollup-regenerator-runtime');` without assigning to a variable.

gotcha This package only works when used as the regenerator moduleName in babel-plugin-transform-runtime. It does not function standalone. ↓

fix Ensure Babel configuration includes the plugins as shown in quickstart.

Install

npm install rollup-regenerator-runtime

yarn add rollup-regenerator-runtime

pnpm add rollup-regenerator-runtime

Imports

regeneratorRuntime
wrong
```
import regeneratorRuntime from 'rollup-regenerator-runtime';
```
correct
```
import 'rollup-regenerator-runtime';
```
This module registers regeneratorRuntime globally as a side effect; no named or default export is provided.

default import

wrong

const regeneratorRuntime = require('rollup-regenerator-runtime');

correct

import 'rollup-regenerator-runtime';

CommonJS require will return an empty object; use import for side effects.

CommonJS require
wrong
```
const regen = require('rollup-regenerator-runtime');
```
correct
```
require('rollup-regenerator-runtime');
```
The module has no exports; use bare require() for side effects only.

Quickstart

Shows Babel configuration to replace babel-runtime regenerator with rollup-regenerator-runtime, and the import needed in the entry file.

// .babelrc
{
  "plugins": [
    "transform-regenerator",
    ["transform-runtime", {
      "helpers": false,
      "polyfill": false,
      "regenerator": true,
      "moduleName": "rollup-regenerator-runtime"
    }]
  ]
}

// In your entry file (must be imported before any async/await or generators)
import 'rollup-regenerator-runtime';