webpack.common.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const isProduction = (process.env.NODE_ENV === 'production');

module.exports = {
  entry: {
    'game': './src/index.js',
  },
  plugins: [
    new CleanWebpackPlugin(),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
    new HtmlWebpackPlugin({
      title: 'Game',
      template: './templates/index.html',
      production: isProduction,
      inject: false,
    }),
  ],
  module: {
    rules: [
      {
        test:/\.(js|jsx)$/,
        exclude:/node_modules/,
        use:['babel-loader']
      },
      {
        test: /\.s[ac]ss$/i,
        use: [
          // Creates `style` nodes from JS strings
          MiniCssExtractPlugin.loader,
          // Translates CSS into CommonJS
          'css-loader',
          // Compiles Sass to CSS
          'sass-loader',
        ],
      },
    ],
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
  },
};