production build with uglify js

package-lock.json

@@ -7060,6 +7060,30 @@
         }
       }
     },
+    "uglifyjs-webpack-plugin": {
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/uglifyjs-webpack-plugin/-/uglifyjs-webpack-plugin-1.2.5.tgz",
+      "integrity": "sha512-hIQJ1yxAPhEA2yW/i7Fr+SXZVMp+VEI3d42RTHBgQd2yhp/1UdBcR3QEWPV5ahBxlqQDMEMTuTEvDHSFINfwSw==",
+      "dev": true,
+      "requires": {
+        "cacache": "10.0.4",
+        "find-cache-dir": "1.0.0",
+        "schema-utils": "0.4.5",
+        "serialize-javascript": "1.4.0",
+        "source-map": "0.6.1",
+        "uglify-es": "3.3.9",
+        "webpack-sources": "1.1.0",
+        "worker-farm": "1.6.0"
+      },
+      "dependencies": {
+        "source-map": {
+          "version": "0.6.1",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "dev": true
+        }
+      }
+    },
     "underscore": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.6.0.tgz",

package.json

@@ -8,6 +8,7 @@
     "css-loader": "^0.28.11",
     "monaco-editor": "^0.12.0",
     "style-loader": "^0.21.0",
+    "uglifyjs-webpack-plugin": "^1.2.5",
     "webpack": "^4.6.0",
     "webpack-cli": "^2.0.14"
   }

webpack.config.js

 const path = require('path');
 const webpack = require('webpack');
+const UglifyJSPlugin = require('uglifyjs-webpack-plugin');
 
 module.exports = {
-	mode: 'development',
+	mode: 'production',
 	entry: {
 		"app": './index.js',
 		"editor.worker": 'monaco-editor/esm/vs/editor/editor.worker.js',
@@ -23,6 +24,7 @@ module.exports = {
 		}]
 	},
 	plugins: [
-		new webpack.IgnorePlugin(/^((fs)|(path)|(os)|(crypto)|(source-map-support))$/, /vs(\/|\\)language(\/|\\)typescript(\/|\\)lib/)
+		new webpack.IgnorePlugin(/^((module)|(fs)|(path)|(os)|(crypto)|(source-map-support))$/, /vs(\/|\\)language(\/|\\)typescript(\/|\\)lib/),
+		new UglifyJSPlugin(),
 	],
 };