Registry / serialization / regenerator-preset

regenerator-preset

library0.14.1jsnpmunverified

Babel preset for easily using regenerator-transform to compile generator and async functions to ES5-compatible code. Current version 0.14.1. Release cadence is slow, primarily updated alongside the broader regenerator project. Key differentiator: provides a simple Babel preset wrapper around regenerator-transform, simplifying configuration compared to manually enabling the transform plugin. Alternatives include using @babel/plugin-transform-regenerator directly.

serialization

npm install regenerator-preset

github ↗package ↗

INSTALL

IMPORT

SIG · REGENERATOR-PRESET

regenerator-preset

serializationjavascriptv0.14.1

Install

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Import

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Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ module.exports = require('regenerator-preset');

✗ import regeneratorPreset from 'regenerator-preset';

This is a CJS package. Use require for Node environments.

Babel config

✓ {"presets": ["regenerator-preset"]}

✗ {"presets": [require('regenerator-preset')]}

String reference works with Babel config files; require is for programmatic use.

TypeScript types

✓ No bundled types; use @types/babel__preset-env or similar

✗ import regeneratorPreset from 'regenerator-preset';

There are no official TypeScript types for this package.

Shows how to configure Babel to use regenerator-preset for transforming async/generator functions.

// Install: npm install --save-dev regenerator-preset // In .babelrc or babel.config.js: { "presets": ["regenerator-preset"] } // This enables regenerator-transform to compile generator and async functions. // Example input: // async function foo() { // await bar(); // } // Example output (simplified) uses regeneratorRuntime.

Debug

Known issues

gotcharegenerator-preset does not include regenerator-runtime; you must add it separately to ensure proper runtime support.

fix

Add regenerator-runtime as a dependency and import it in your entry file.

affects: all

deprecatedThe package is deprecated in favor of using @babel/preset-env which includes regenerator-transform automatically.

fix

Use @babel/preset-env with "useBuiltIns": "usage" to automatically include regenerator-runtime.

affects: >=0.14.0

gotchaIf using with async functions, ensure 'async' option is enabled in regenerator-transform; it is enabled by default, but may conflict with other plugins.

fix

Explicitly set options in your Babel config if needed: ['regenerator-preset', { 'asyncGenerators': true }].

affects: >=0.7.0

Errors

Common errors & fixes

ReferenceError: regeneratorRuntime is not defined

Missing regenerator-runtime in the runtime environment.

fix

Install regenerator-runtime and import it: npm install regenerator-runtime; then add import 'regenerator-runtime/runtime';

SyntaxError: Unexpected token function

Babel not transpiling async/generator functions because preset is not correctly applied.

fix

Ensure regenerator-preset is in your Babel presets array and that Babel is configured to run on the file.

Upgrade

Version history

0.14.1latest on npm

Audit

Dependencies

@babel/corerequiredBabel core required to use presets

Agent activity

9 hits · last 30 days

node

Resources

githubhttps://github.com/facebook/regenerator.git#main ↗

packagehttps://www.npmjs.com/package/regenerator-preset ↗