UglifyJS Webpack Plugin

UglifyJS Webpack Plugin uses UglifyJS (v2) to minify JavaScript bundles generated by webpack. The latest stable version is 2.2.0, released July 2019, supporting webpack 4+ and Node 6.9+. It offers caching, parallelization, source maps, and advanced options like chunk filtering. However, it is now largely superseded by terser-webpack-plugin, which supports ES6+ and is the recommended minimizer for webpack 4+. This plugin switched back from uglify-es to uglify-js in v2.0.0, meaning it does not handle modern JavaScript (ES6+) out of the box. It is in maintenance mode with no active development.