Switching from grunt to webpack for compilation, minify wasn't working

webpack.js

@@ -0,0 +1,78 @@
+const path = require('path');
+const webpack = require('webpack');
+const ESLintPlugin = require('eslint-webpack-plugin');
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+
+const JSLoader = {
+  test: /\.js$/i,
+  use: {
+    loader: 'babel-loader',
+    options: {
+      presets: [
+        [
+          '@babel/preset-env',
+          {
+            'corejs': '3',
+            'useBuiltIns': 'entry',
+            'targets': {
+              'browsers': [
+                'edge >= 16',
+                'safari >= 9',
+                'firefox >= 57',
+                'ie >= 11',
+                'ios >= 9',
+                'chrome >= 49',
+              ],
+            },
+          },
+        ],
+        ['@babel/preset-flow'],
+      ],
+      plugins: [
+        '@babel/plugin-proposal-class-properties',
+        '@babel/plugin-proposal-private-methods',
+        '@babel/plugin-proposal-optional-chaining',
+      ],
+    },
+  },
+};
+
+module.exports = {
+  mode: 'development',
+  devtool: 'source-map',
+  entry: {
+    'aicc': './src/exports/aicc.js',
+    'scorm12': './src/exports/scorm12.js',
+    'scorm2004': './src/exports/scorm2004.js',
+    'scorm-again': './src/exports/scorm-again.js',
+    'aicc.min': './src/exports/aicc.js',
+    'scorm12.min': './src/exports/scorm12.js',
+    'scorm2004.min': './src/exports/scorm2004.js',
+    'scorm-again.min': './src/exports/scorm-again.js',
+  },
+  target: ['web', 'es5'],
+  module: {
+    rules: [
+      JSLoader,
+    ],
+  },
+  output: {
+    path: path.resolve(__dirname, 'dist'),
+    environment: {
+      arrowFunction: false,
+    },
+  },
+  optimization: {
+    minimize: true,
+    minimizer: [new UglifyJsPlugin({
+      include: /\.min\.js$/,
+    })],
+  },
+  plugins: [
+    new ESLintPlugin({
+      overrideConfigFile: path.resolve(__dirname, '.eslintrc.js'),
+      context: path.resolve(__dirname, '../src'),
+      files: '**/*.js',
+    }),
+  ],
+};