gulp‑uglifyjs is a Gulp plugin that minifies (and optionally concatenates) multiple JavaScript files using Uglify‑JS2, exposing the full range of Uglify’s options and source‑map support. It’s aimed at front‑end build pipelines where developers want fine‑grained control over the minification process, though the package is now deprecated in favor of using gulp‑concat with gulp‑sourcemaps.