Replaced uglifyjs w/ webpack 5 TerserPlugin.

config/service-worker.config.js

@@ -2,7 +2,7 @@
 
 const webpack = require("webpack");
 const helpers = require("./helpers");
-const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
 
 const ServiceWorkerConfig = {
   resolve: {
@@ -31,11 +31,10 @@ const ServiceWorkerConfig = {
     //filename: "js/[name].bundle.js"
   },
   optimization: {
+    minimize: true,
     minimizer: [
-      new UglifyJSPlugin({
+      new TerserPlugin({
-        cache: true,
+        test: /\.js(\?.*)?$/i,
-        parallel: false,
-        sourceMap: false
       })
     ]
   },

config/webpack.config.prod.js

@@ -6,7 +6,8 @@ const webpack = require("webpack");
 const merge = require("webpack-merge");
 const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
 const MiniCSSExtractPlugin = require("mini-css-extract-plugin");
-const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
+const TerserPlugin = require("terser-webpack-plugin");
+
 const helpers = require("./helpers");
 const commonConfig = require("./webpack.config.common");
 const isProd = process.env.NODE_ENV === "production";
@@ -33,16 +34,15 @@ const webpackConfig = merge(commonConfig(false), {
         }
       }
     },
+    minimize: true,
     minimizer: [
       new OptimizeCSSAssetsPlugin({
         cssProcessorPluginOptions: {
           preset: ["default", { discardComments: { removeAll: true } }]
         }
       }),
-      new UglifyJSPlugin({
+      new TerserPlugin({
-        cache: true,
+        test: /\.js(\?.*)?$/i,
-        parallel: false,
-        sourceMap: !isProd
       })
     ]
   },

package.json

@@ -64,7 +64,6 @@
     "pm2": "^4.2.3",
     "redis": "^3.0.2",
     "sass-loader": "~7.1",
-    "uglifyjs-webpack-plugin": "~1.2",
     "url-loader": "^2.2.0",
     "vue-loader": "~15.6",
     "vue-style-loader": "~4.1",