npm init // 

  npm install --save-dev webpack
  npm install --save-dev webpack-cli
  npm install webpack-dev-server --save-dev

  npm install -D babel-loader @babel/core @babel/preset-env  // установка babel
  npm install cache-loader style-loader css-loader sass-loader node-sass --save-dev
  npm i -D html-webpack-plugin

webpack.config.js : webpack-advanced

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'build.js',
    path: __dirname + '/assets'
  }
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },{
        test: /\.scss$/,
        use: [
            "style-loader", // creates style nodes from JS strings
            "css-loader", // translates CSS into CommonJS
            "sass-loader" // compiles Sass to CSS, using Node Sass by default
        ]
      },{
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
    ]
  }
  plugins: [
    new HtmlWebpackPlugin({
      title: 'My App'
    })
  ]
};


package.json

  {
    ...
    "scripts": {
      "build": "webpack --config webpack.config.js",
      "dev": "webpack --watch"
    },
    ...
  }


  npm run build  // сборка на продакшн
  npm run dev  // для разработки