Registry / web-framework / babel-plugin-fast-async

babel-plugin-fast-async

library6.1.2jsnpmunverified

A Babel v6 plugin that transforms ES7 async/await syntax using fast synchronous transformation instead of generators/regenerator, achieving 3-4x performance improvements in browsers and Node, and up to 10x on mobile. Currently at v6.2.1, it uses the nodent library for compilation and supports options like Promise-based output, generator fallback, and runtime module imports. Requires nodent runtime unless using 'spec' mode with noRuntime. Released under MIT.

web-framework testing

npm install babel-plugin-fast-async

github ↗package ↗

INSTALL

IMPORT

SIG · BABEL-PLUGIN-FAST-

babel-plugin-fast-async

web-frameworkjavascriptv6.1.2

Install

—

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.

plugin

✓ // .babelrc { "plugins": ["fast-async"] }

✗ import fastAsync from 'fast-async'

This is a Babel plugin, not a runtime import. Use in Babel configuration (JSON, JS, etc.)

default

✓ // No JavaScript import required; plugin applied via Babel config

✗ const fastAsync = require('fast-async')

fast-async is not designed for direct JavaScript require/import. Only use in Babel configuration.

PluginFactory

✓ // Programmatic Babel usage: const fastAsync = require('fast-async'); babel.transform(code, { plugins: [fastAsync] });

✗ import { fastAsync } from 'fast-async'

When used programmatically, require the module as a function. Named export does not exist.

Minimal .babelrc to enable fast-async plugin for async/await transformation.

{ "plugins": ["fast-async"] }

Debug

Known issues

breakingBabel v6 only; does not support Babel v7+.

fix

Upgrade to Babel v7 and use @babel/plugin-transform-async-to-generator or similar.

affects: >=0.0.0

gotchaRuntime must be included manually for multi-file projects. Set runtimePattern for single include.

fix

Set 'runtimePattern' option to a regex matching one file, or use 'useRuntimeModule' for import.

affects: >=6.0.0

gotchaStack trace mapping disabled by default (dontMapStackTraces: true) as of v6.1.x.

fix

Set 'dontMapStackTraces: false' in env options if you need mapped stack traces.

affects: >=6.1.0

Errors

Common errors & fixes

Module not found: Can't resolve 'nodent'

nodent is a peer dependency but not installed.

fix

Run 'npm install nodent --save' alongside fast-async.

SyntaxError: Unexpected token function

Babel v7+ does not support fast-async; use built-in plugins.

fix

Use @babel/plugin-transform-async-to-generator instead of fast-async.

TypeError: Cannot assign to read only property 'exports' of object '#<Object>'

Mixing ESM and CJS in compiled code; runtime conflict.

fix

Ensure consistent module system; set Babel sourceType appropriately.

Upgrade

Version history

6.1.2latest on npm

Audit

Dependencies

nodentrequiredCore transformation engine for async/await to Promise or generator code.

Agent activity

17 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/MatAtBread/fast-async ↗

packagehttps://www.npmjs.com/package/babel-plugin-fast-async ↗