webpack.prod.js

/**
 * Copyright 2019 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const path = require('path');
const UglifyJsPlugin = require('terser-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const merge = require('webpack-merge');
const common = require('./webpack.common.js');

module.exports = merge(common, {
  mode: 'production',
  plugins: [new MiniCssExtractPlugin({
    // Options similar to the same options in webpackOptions.output
    // both options are optional
    filename: '[name].css',
    chunkFilename: '[id].css'
  })],
  module: {
    rules: [{
      test: /\.scss$/,
      use: [
        {
          loader: MiniCssExtractPlugin.loader,
        },
        {
          loader: 'css-loader',
        },
        {
          loader: 'sass-loader',
        },
      ]
    }],
  },
  optimization:
      {minimizer: [new UglifyJsPlugin({parallel: true, sourceMap: false})]},
});