Registry / devops / webpack-parallel-uglify-plugin

webpack-parallel-uglify-plugin

library2.0.0jsnpmunverified

A webpack plugin that runs UglifyJS (or Terser) in parallel across multiple workers to speed up minification of bundled assets. Version 2.0.0 is the current stable release, but the project appears to be in maintenance mode with no recent updates (last release 2019). It leverages Node.js worker threads to distribute minification of each output file across available CPU cores, offering significant build time reductions for projects with many entry points. Compared to built-in webpack UglifyJS plugin, it can reduce minification time from minutes to seconds. Supports both UglifyJS (ES5) and Terser (ES6+), along with caching, file inclusion/exclusion by pattern, and source maps. Requires webpack as a peer dependency.

devops

npm install webpack-parallel-uglify-plugin

github ↗package ↗

INSTALL

IMPORT

SIG · WEBPACK-PARALLEL-U

webpack-parallel-uglify-plugin

devopsjavascriptv2.0.0

Install

—

Import

—

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

✓ import ParallelUglifyPlugin from 'webpack-parallel-uglify-plugin'

✗ const ParallelUglifyPlugin = require('webpack-parallel-uglify-plugin')

ESM default import is correct; CommonJS require works but may have issues with default export

ParallelUglifyPlugin

✓ const ParallelUglifyPlugin = require('webpack-parallel-uglify-plugin').default

✗ const ParallelUglifyPlugin = require('webpack-parallel-uglify-plugin')

If using CommonJS, the default export is under .default property

ParallelUglifyPlugin

✓ import { default as ParallelUglifyPlugin } from 'webpack-parallel-uglify-plugin'

✗ import { ParallelUglifyPlugin } from 'webpack-parallel-uglify-plugin'

Named import does not exist; only default export

Shows how to configure the plugin with UglifyJS options, caching, and worker count.

// webpack.config.js import ParallelUglifyPlugin from 'webpack-parallel-uglify-plugin'; export default { entry: './src/index.js', output: { filename: 'bundle.js', path: '/dist', }, plugins: [ new ParallelUglifyPlugin({ workerCount: 4, uglifyJS: { output: { beautify: false, }, compress: { drop_console: true, }, }, cacheDir: '/path/to/cache', sourceMap: false, include: /\.js$/, exclude: /node_modules/, test: /\.js$/, }), ], };

Debug

Known issues

deprecatedThe package is outdated and unmaintained; consider using 'terser-webpack-plugin' which is officially maintained by the webpack team.

fix

Replace with 'terser-webpack-plugin' and update configuration accordingly.

affects: >=0.0.0

breakingCannot use both 'uglifyJS' and 'terser' options simultaneously. If both are provided, the plugin will throw an error.

fix

Choose only one minifier: either UglifyJS or Terser.

affects: >=1.0.0

gotchaWith UglifyJS (not Terser), ES6+ syntax will cause an error because UglifyJS only supports ES5. Use terser option for ES6+.

fix

Set terser options instead of uglifyJS if your code uses ES6+.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'webpack-parallel-uglify-plugin'

Package not installed or import path incorrect.

fix

Run 'npm install webpack-parallel-uglify-plugin --save-dev' and ensure correct import statement.

TypeError: ParallelUglifyPlugin is not a constructor

Using CommonJS require without accessing .default property.

fix

Use 'const ParallelUglifyPlugin = require('webpack-parallel-uglify-plugin').default;'

Error: ParallelUglifyPlugin: you cannot use both uglifyJS and terser

Both minifier options provided simultaneously.

fix

Remove one of the options: either uglifyJS or terser.

Upgrade

Version history

2.0.0latest on npm

Audit

Dependencies

webpackrequiredpeer dependency; plugin only works with webpack builds

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/gdborton/webpack-parallel-uglify-plugin ↗

packagehttps://www.npmjs.com/package/webpack-parallel-uglify-plugin ↗