# webpack-contrib/uglifyjs-webpack-plugin

[deprecated] UglifyJS Plugin

Repository: https://github.com/webpack-contrib/uglifyjs-webpack-plugin
Canonical: https://ross.abutalabs.com/products/uglifyjs-webpack-plugin
Language: JavaScript
License: MIT
License Family: permissive
Topics: webpack-plugin, webpack, uglify, minify, minimizer
Archived: true
Last push: 2019-12-05T12:01:04+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3511, "days_push": 2463, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1368, forks 171 (observed 2026-08-28T04:04:31.632998+00:00)

## What it is
A deprecated webpack plugin that uses UglifyJS to minify JavaScript bundles. It has been replaced by terser-webpack-plugin and should not be used for new projects.

## Use cases
- minify javascript bundles in webpack 4
- compress js output with uglify-js
- configure webpack optimization minimizer
- filter which webpack chunks get minified
- cache minification results in webpack builds

## When to choose
- maintaining a legacy webpack 4 project already using this plugin
- you specifically need UglifyJS as the minifier for compatibility reasons

## When to avoid
- starting any new webpack project
- using webpack 5 or later
- you need ES6+ minification support
- you want an actively maintained minifier

## Facets
- artifact type: plugin
- maturity: abandoned
- function: build-tool, compression
- domain: developer-tools, web-development, frontend
- platform: -
- tags: webpack-plugin, minification, uglifyjs, deprecated, javascript-bundler, nodejs, javascript

## Member repositories
- webpack-contrib/uglifyjs-webpack-plugin (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:31.632998+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:41:05.278892+00:00, confidence not recorded.
  - readme: https://github.com/webpack-contrib/uglifyjs-webpack-plugin (fetched 2026-08-28T04:04:31.632998+00:00, sha 9047e26c9f39)
  - registry_npm: https://registry.npmjs.org/uglifyjs-webpack-plugin (fetched 2026-08-29T11:58:22.035320+00:00, sha 2b74f470ab92)
- Data as of 2026-08-30T08:39:29.467469+00:00.