webpack-contrib/uglifyjs-webpack-plugin

$ npm install uglifyjs-webpack-plugin --save-dev

const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

module.exports = {
  optimization: {
    minimizer: [new UglifyJsPlugin()],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        test: /\.js(\?.*)?$/i,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        include: /\/includes/,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        exclude: /\/excludes/,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        chunkFilter: (chunk) => {
          // Exclude uglification for the `vendor` chunk
          if (chunk.name === 'vendor') {
            return false;
          }

          return true;
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: 'path/to/cache',
      }),
    ],
  },
};

({
  'uglify-js': require('uglify-js/package.json').version, // uglify version
  'uglifyjs-webpack-plugin': require('../package.json').version, // plugin version
  'uglifyjs-webpack-plugin-options': this.options, // plugin options
  path: compiler.outputPath ? `${compiler.outputPath}/${file}` : file, // asset path
  hash: crypto
    .createHash('md4')
    .update(input)
    .digest('hex'), // source file hash
});

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        cacheKeys: (defaultCacheKeys, file) => {
          defaultCacheKeys.myCacheKey = 'myCacheKeyValue';

          return defaultCacheKeys;
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        parallel: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        parallel: 4,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        sourceMap: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        minify(file, sourceMap) {
          const extractedComments = [];

          // Custom logic for extract comments

          const { error, map, code, warnings } = require('uglify-module') // Or require('./path/to/uglify-module')
            .minify(file, {
              /* Your options for minification */
            });

          return { error, map, code, warnings, extractedComments };
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        uglifyOptions: {
          warnings: false,
          parse: {},
          compress: {},
          mangle: true, // Note `mangle.properties` is `false` by default.
          output: null,
          toplevel: false,
          nameCache: null,
          ie8: false,
          keep_fnames: false,
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: 'all',
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: /@extract/i,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: function(astNode, comment) {
          if (/@extract/i.test(comment.value)) {
            return true;
          }

          return false;
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: {
          condition: /^\**!|@preserve|@license|@cc_on/i,
          filename(file) {
            return `${file}.LICENSE`;
          },
          banner(licenseFile) {
            return `License information can be found in ${licenseFile}`;
          },
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: {
          condition: 'some',
          filename(file) {
            return `${file}.LICENSE`;
          },
          banner(licenseFile) {
            return `License information can be found in ${licenseFile}`;
          },
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: {
          condition: /^\**!|@preserve|@license|@cc_on/i,
          filename: 'extracted-comments.js',
          banner(licenseFile) {
            return `License information can be found in ${licenseFile}`;
          },
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        extractComments: {
          condition: true,
          filename(file) {
            return `${file}.LICENSE`;
          },
          banner(commentsFile) {
            return `My custom banner about license information ${commentsFile}`;
          },
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        warningsFilter: (warning, source) => {
          if (/Dropping unreachable code/i.test(warning)) {
            return true;
          }

          if (/filename\.js/i.test(source)) {
            return true;
          }

          return false;
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        uglifyOptions: {
          output: {
            comments: /@license/i,
          },
        },
        extractComments: true,
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        uglifyOptions: {
          output: {
            comments: false,
          },
        },
      }),
    ],
  },
};

module.exports = {
  optimization: {
    minimizer: [
      new UglifyJsPlugin({
        // Uncomment lines below for cache invalidation correctly
        // cache: true,
        // cacheKeys(defaultCacheKeys) {
        //   delete defaultCacheKeys['uglify-js'];
        //
        //   return Object.assign(
        //     {},
        //     defaultCacheKeys,
        //     { 'uglify-js': require('uglify-js/package.json').version },
        //   );
        // },
        minify(file, sourceMap) {
          // https://github.com/mishoo/UglifyJS2#minify-options
          const uglifyJsOptions = {
            /* your `uglify-js` package options */
          };

          if (sourceMap) {
            uglifyJsOptions.sourceMap = {
              content: sourceMap,
            };
          }

          return require('terser').minify(file, uglifyJsOptions);
        },
      }),
    ],
  },
};