webpack.config.js

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

module.exports = {
  mode: 'development',
  entry: { index: './src/js/index.js', ga: './src/js/lib/ga.js' },
  output: {
    filename: '[name].js',
  },
  plugins: [
    new webpack.ProvidePlugin({
      $: 'jquery',
      jQuery: 'jquery',
    }),
    new HtmlWebpackPlugin({
      template: './src/html/index.html',
    }),
  ],
  devServer: {
    contentBase: 'dist',
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              emitFile: true,
            },
          },
        ],
      },
    ],
  },
  optimization: {
    minimizer: [new UglifyJsPlugin()],
  },
};