lguzzon-js / rollup-plugin-uglify

Rollup plugin to minify generated bundle

rollup-plugin-uglify

Rollup plugin to minify generated bundle.

Install

npm i rollup-plugin-uglify -D

Usage

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

rollup({
    entry: 'main.js',
    plugins: [
        uglify()
    ]
});

Options

uglify(options, minifier)

options – default: {}, type: object. UglifyJS API options

minifier – default: require('uglify-js').minify, type: function. Module to use as a minifier. You can use other versions (or forks) of UglifyJS instead default one.

Warning

UglifyJS, which this plugin is based on, does not support the ES2015 module syntax. Thus using this plugin with Rollup's default bundle format ('es') will not work and error out. To work around this you can tell rollup-plugin-uglify to use the UglifyJS unstable es version by passing its minify function to minify your code.

import { rollup } from 'rollup';
import uglify from 'rollup-plugin-uglify';
import { minify } from 'uglify-es';

rollup({
    entry: 'main.js',
    plugins: [
        uglify({}, minify)
    ]
});

To install the experimental version of UglifyJS:

npm i uglify-es -D

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) {
        var text = comment.value;
        var type = comment.type;
        if (type == "comment2") {
            // multiline comment
            return /@preserve|@license|@cc_on/i.test(text);
        }
    }
  }
});

See UglifyJS documentation for further reference.

License

MIT © Bogdan Chadkin