Expose chunk to `options.<test|include|exclude>`

[japgolly]

The test, include and exclude options only inspect the output filename, which has no value when the names are like [hash].[ext]. It would be very helpful to expose the associated chunk info as well.

[hulkish]

@japgolly How about this for usage:

new UglifyJsPlugin ({ 
  // same as current behavior, would convert old syntax to this for legacy support.
  assets: {
    test: /uglify-me-with-ecma-5.js/,
    exclude: path.resolve(__dirname, '../src/dont-uglify-me-bro'),
    options: {// override the plugin uglifyOptions per match!
      ecma: 5
    }
  },
  modules: {
    include: /uglify-me-with-ecma-8.js/,
    options: {
      ecma: 8
    }
    // also accepts test/exclude 
  },
  uglifyOptions: {
    ecma: 7
  }
});

and/or:

new UglifyJsPlugin ({ 
  assets: [
    {
      test: /uglify-me-with-ecma-5.js$/,
      exclude: path.resolve(__dirname, '../src/dont-uglify-me-bro'),
      options: { ecma: 5 }
    },
    {
      test: /uglify-me-with-ecma-5.js$/,
      exclude: path.resolve(__dirname, '../src/dont-uglify-me-bro'),
      options: { ecma: 5 }
    },
  ]
  modules: [
    {
      include: /uglify-me-with-ecma-8.js$/,
      options: { ecma: 8 }
    },
    {
      include: /uglify-me-with-ecma-8.js$/,
      options: { ecma: 8 }
    },
  ],
  uglifyOptions: {
    ecma: 7
  }
});

and/or:

new UglifyJsPlugin ({ 
  modules(module) (
    if (module.resource.indexOf('uglify-me-bro.js') > -1) {
      return { ecma: 8 }; // can return boolean or object
    }
    return true;
  ),
  assets(file) (
    return file.indexOf('plssss-uglify-me.js') > -1;
  ),
  uglifyOptions: {
    ecma: 7
  }
});

and/or:

new UglifyJsPlugin ({ 
  assets: /plssss-uglify-me.js$/,
  uglifyOptions: {
    ecma: 7
  }
});

I think this offers the finest grain of control.

[FranckFreiburger]

I have created a loader for javascript-obfuscator, and I would like to avoid uglifyjs-webpack-plugin to process resources that pass through that loader (because obfuscated code must not be uglified).

I would like to use something like:

  modules(module) (
    if ( module.loaders.find(loader => .... 'javascript-obfuscator-loader' ....) !== null ) {
      return false
    }
    return true;
  ),

[Friksel]

+1
A way to exclude libs from uglifying/mangling would be very welcome!

[alexander-akait]

Will be shipped in near future