rollup-plugin-uglify

rollup-plugin-uglify

Rollup plugin to minify generated bundle. Uses UglifyJS under the hood. There are a few improvements over native uglify:

• uglify is run in worker for every chunk
• errors are displayed with babel code frame

Note: uglify-js is able to transpile only es5 syntax. If you want to transpile es6+ syntax use terser instead

Install

npm i rollup-plugin-uglify -D

Usage

import { rollup } from "rollup";
import { uglify } from "rollup-plugin-uglify";

rollup({
  input: "main.js",
  plugins: [uglify()]
});

Options

uglify(options);

options - uglifyJS API options

options.sourcemap – default: true, type: boolean. The only own option which is used to generate source maps and pass them to rollup.

Examples

Comments

If you'd like to preserve comments (for licensing for example), then you can specify a function to do this like so:

uglify({
  output: {
    comments: function(node, comment) {
      if (comment.type === "comment2") {
        // multiline comment
        return /@preserve|@license|@cc_on/i.test(comment.value);
      }
      return false;
    }
  }
});

Alternatively, you can also choose to keep all comments (e.g. if a licensing header has already been prepended by a previous rollup plugin):

uglify({
  output: {
    comments: "all"
  }
});

See UglifyJS documentation for further reference.

License

MIT © Bogdan Chadkin