webpack.dev.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const autoprefixer = require('autoprefixer');
const FaviconsWebpackPlugin = require('favicons-webpack-plugin')

module.exports = {

  // https://webpack.js.org/concepts/entry-points/#multi-page-application
  entry: {
    index: './src/index.js'
  },

  // https://webpack.js.org/configuration/dev-server/
  devServer: {
    host: '0.0.0.0',
    port: 8080
  },

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env']
        }
      },
      {
        test: /\.css$|.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'postcss-loader',
          {
            loader: 'sass-loader',
            options: {
              sassOptions: {
                includePaths: ['./node_modules']
              }
            }
          }
        ]
      },
      {
        loader: "webpack-modernizr-loader",
        test: /\.modernizrrc\.js$/
        // Uncomment this when you use `JSON` format for configuration
        // type: 'javascript/auto'
      }
    ]
  },

  // https://webpack.js.org/concepts/plugins/
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/index.html',
      inject: true,
      chunks: ['index'],
      filename: 'index.html'
    }),
    new FaviconsWebpackPlugin('./src/img/icon.png'),
    new MiniCssExtractPlugin({
      filename: "[name].css",
      chunkFilename: "[id].css"
    })
  ]
};