Registry / devops / rollup-plugin-uglify

rollup-plugin-uglify

library6.0.4jsnpmunverified

Rollup plugin to minify generated bundles using UglifyJS. Current stable version is 6.0.4, compatible with Rollup >=0.66.0 <2. It runs UglifyJS in a worker per chunk, improving build performance for code-split projects, and displays errors with babel code frames. Supports source maps and configurable number of workers. Note: UglifyJS handles only ES5; for ES6+ use the similar rollup-plugin-terser. This plugin has undergone several breaking changes in major versions, including moving to worker-based uglification (v5) and reverting from uglify-es back to uglify-js (v4).

devops web-framework

npm install rollup-plugin-uglify

github ↗package ↗

INSTALL

IMPORT

SIG · ROLLUP-PLUGIN-UGLI

rollup-plugin-uglify

devopsjavascriptv6.0.4

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 18–223 runs

build_error

glibc

node 18–223 runs

build_error

Code

Verified usage

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

uglify

✓ import { uglify } from 'rollup-plugin-uglify'

✗ const uglify = require('rollup-plugin-uglify')

Default export changed to named export in v4.0.0. ESM-only, no CommonJS named export.

uglify

✓ import { uglify } from 'rollup-plugin-uglify'

✗ import uglify from 'rollup-plugin-uglify'

Default export removed in v4.0.0. Must use named import.

uglify

✓ const { uglify } = require('rollup-plugin-uglify')

✗ const uglify = require('rollup-plugin-uglify')

For CommonJS usage, destructure the named export. Direct require gives an object with uglify property.

Basic Rollup configuration using rollup-plugin-uglify to minify output with source maps and custom comments.

// Install: npm install --save-dev rollup-plugin-uglify // rollup.config.js import { uglify } from 'rollup-plugin-uglify'; export default { input: 'src/index.js', output: { file: 'dist/bundle.js', format: 'iife' }, plugins: [ uglify({ sourcemap: true, numWorkers: 2, output: { comments: 'some' } }) ] };

Debug

Known issues

breakingDefault export removed in v4.0.0. Use named import { uglify } instead.

fix

import { uglify } from 'rollup-plugin-uglify'

affects: >=4.0.0

breakingRemoved 'minifier' option in v5.0.0. Use rollup-plugin-terser for UglifyES/Terser.

fix

Switch to rollup-plugin-terser if you need ES6+ minification.

affects: >=5.0.0

breakingRenamed 'sourceMap' option to 'sourcemap' in v5.0.0 to match Rollup API.

fix

Use { sourcemap: true } instead of { sourceMap: true }

affects: >=5.0.0

deprecatedrollup-plugin-uglify only supports ES5. For ES6+ code, use rollup-plugin-terser.

fix

Replace with rollup-plugin-terser if your code contains ES6+ syntax.

affects: >=4.0.0

gotchaPackage requires Rollup >=0.66.0 and <2. It may not work with Rollup v2 or later.

fix

Check rollup version; consider using rollup-plugin-terser for Rollup >=2.

affects: >=0.66.0

Errors

Common errors & fixes

Error: 'uglify' is not exported from 'rollup-plugin-uglify'

Using default import or CommonJS require incorrectly in v4+.

fix

Use named import: import { uglify } from 'rollup-plugin-uglify'

TypeError: Cannot set property 'numWorkers' of undefined

Missing options object or passing invalid workers configuration.

fix

Ensure uglify() is called with an object: uglify({ numWorkers: 2 })

SyntaxError: Unexpected token: punc ())

UglifyJS cannot parse ES6+ syntax; this plugin only handles ES5.

fix

Use rollup-plugin-terser instead, or transpile code to ES5 first.

Upgrade

Version history

6.0.4latest on npm

Audit

Dependencies

rolluprequiredpeer dependency; plugin requires rollup to function

Agent activity

2 hits · last 30 days

node

Resources

githubhttps://github.com/TrySound/rollup-plugin-uglify ↗

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