@lopatnov/rollup-plugin-uglify

A Rollup plugin for minifying JavaScript bundles using Terser. Full TypeScript support, multiple output formats, flexible file filtering, zero configuration required for basic usage.

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Table of Contents

• Installation
• Usage
• Options
• Troubleshooting
• Contributing
• Built With
• License

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Installation

Prerequisites

This plugin requires Rollup and Terser as peer dependencies:

npm install rollup terser --save-dev

Install the plugin

npm install @lopatnov/rollup-plugin-uglify --save-dev

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Usage

Basic Usage

// rollup.config.js
import uglify from "@lopatnov/rollup-plugin-uglify";

export default {
  input: "src/index.js",
  output: {
    file: "dist/bundle.js",
    format: "cjs",
  },
  plugins: [uglify()],
};

With Options

import uglify from "@lopatnov/rollup-plugin-uglify";

export default {
  input: "src/index.js",
  output: {
    file: "dist/bundle.js",
    format: "es",
    sourcemap: true,
  },
  plugins: [
    uglify({
      compress: {
        drop_console: true,
        drop_debugger: true,
      },
      mangle: true,
      ecma: 2020,
    }),
  ],
};

CommonJS Import

const uglify = require("@lopatnov/rollup-plugin-uglify");

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Options

The uglify() function accepts an optional configuration object that extends Terser's MinifyOptions.

Plugin-specific Options

Option	Type	Default	Description
include	string | RegExp	-	Pattern to match chunks that should be minified
exclude	string | RegExp	-	Pattern to match chunks that should be skipped
hook	"renderChunk" | "transform"	"transform"	Rollup hook to use for minification. It's recommended to use "renderChunk" value

Common Terser Options

Option	Type	Default	Description
sourceMap	boolean	auto	Generate source maps (follows output sourcemap option)
compress	object	-	Compression options
mangle	boolean	-	Mangle variable names
ecma	number	-	ECMAScript version (2015, 2020, etc.)

For a complete list of options, see the Terser documentation.

Examples

Minify only specific files:

uglify({ include: /\.min\.js$/ });

Exclude test files:

uglify({ exclude: /\.test\.js$/ });

Use legacy transform hook (per-module minification):

uglify({ hook: "transform", compress: true });

Production build with aggressive compression:

uglify({
  compress: {
    drop_console: true,
    drop_debugger: true,
    pure_funcs: ["console.log"],
  },
  mangle: { properties: false },
  ecma: 2020,
});

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Troubleshooting

Cannot find module @rollup/pluginutils

If you're upgrading from version 2.1.2 to 2.1.4+, the dependency has been updated from rollup-pluginutils to @rollup/pluginutils. Run npm install to resolve.

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Contributing

Contributions are welcome! Please read CONTRIBUTING.md before opening a pull request.

• Bug reports → open an issue
• Questions → Discussions
• Found it useful? A star on GitHub helps others discover the project

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Built With

• TypeScript — strict typing throughout
• Rollup — bundled to ESM, CJS, and UMD formats
• Terser — JavaScript minification engine
• @rollup/pluginutils — include/exclude pattern filtering
• Jest — unit testing with coverage

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License

Apache-2.0 © 2019–2026 Oleksandr Lopatnov · LinkedIn