From 2e60ec13cb01485153ff466edab1285628172bff Mon Sep 17 00:00:00 2001
From: Jake Marsden <jakemarsdenjm@gmail.com>
Date: Fri, 12 Oct 2018 00:54:45 +1300
Subject: [PATCH] Replace uglifyjs-webpack-plugin with terser-webpack-plugin

For the same reasons as https://github.com/webpack/webpack/pull/8036
Webpack will switch to terser by default for 5.x
---
 webapp/package-lock.json | 37 +++++++++++++++++++++++++++++++++++++
 webapp/package.json      |  2 +-
 webapp/webpack.config.js |  8 ++++----
 3 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/webapp/package-lock.json b/webapp/package-lock.json
index a16738a..80cc668 100644
--- a/webapp/package-lock.json
+++ b/webapp/package-lock.json
@@ -9452,6 +9452,16 @@
                 "urix": "^0.1.0"
             }
         },
+        "source-map-support": {
+            "version": "0.5.9",
+            "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.9.tgz",
+            "integrity": "sha512-gR6Rw4MvUlYy83vP0vxoVNzM6t8MUXqNuRsuBmBHQDu1Fh6X015FrLdgoDKcNdkwGubozq0P4N0Q37UyFVr1EA==",
+            "dev": true,
+            "requires": {
+                "buffer-from": "^1.0.0",
+                "source-map": "^0.6.0"
+            }
+        },
         "source-map-url": {
             "version": "0.4.0",
             "resolved": "https://registry.npmjs.org/source-map-url/-/source-map-url-0.4.0.tgz",
@@ -9923,6 +9933,33 @@
                 "uuid": "^3.0.1"
             }
         },
+        "terser": {
+            "version": "3.10.0",
+            "resolved": "https://registry.npmjs.org/terser/-/terser-3.10.0.tgz",
+            "integrity": "sha512-hNh2WR3YxtKoY7BNSb3+CJ9Xv9bbUuOU9uriIf2F1tiAYNA4rNy2wWuSDV8iKcag27q65KPJ/sPpMWEh6qttgw==",
+            "dev": true,
+            "requires": {
+                "commander": "~2.17.1",
+                "source-map": "~0.6.1",
+                "source-map-support": "~0.5.6"
+            }
+        },
+        "terser-webpack-plugin": {
+            "version": "1.1.0",
+            "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.1.0.tgz",
+            "integrity": "sha512-61lV0DSxMAZ8AyZG7/A4a3UPlrbOBo8NIQ4tJzLPAdGOQ+yoNC7l5ijEow27lBAL2humer01KLS6bGIMYQxKoA==",
+            "dev": true,
+            "requires": {
+                "cacache": "^11.0.2",
+                "find-cache-dir": "^2.0.0",
+                "schema-utils": "^1.0.0",
+                "serialize-javascript": "^1.4.0",
+                "source-map": "^0.6.1",
+                "terser": "^3.8.1",
+                "webpack-sources": "^1.1.0",
+                "worker-farm": "^1.5.2"
+            }
+        },
         "through": {
             "version": "2.3.8",
             "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
diff --git a/webapp/package.json b/webapp/package.json
index 1a223de..2291308 100644
--- a/webapp/package.json
+++ b/webapp/package.json
@@ -33,7 +33,7 @@
         "resolve-url-loader": "2.3.1",
         "sass-loader": "7.1.0",
         "speed-measure-webpack-plugin": "1.2.2",
-        "uglifyjs-webpack-plugin": "1.3.0",
+        "terser-webpack-plugin": "1.1.0",
         "webpack": "4.17.2",
         "webpack-bundle-analyzer": "2.13.1",
         "webpack-cli": "3.1.0"
diff --git a/webapp/webpack.config.js b/webapp/webpack.config.js
index 8868ce1..53a4c7e 100644
--- a/webapp/webpack.config.js
+++ b/webapp/webpack.config.js
@@ -7,8 +7,8 @@ const CompressionPlugin = require('compression-webpack-plugin');
 const HtmlPlugin = require('html-webpack-plugin');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
 const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
-const SpeedMeasurePlugin = require("speed-measure-webpack-plugin");
-const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
+const SpeedMeasurePlugin = require('speed-measure-webpack-plugin');
+const TerserPlugin = require('terser-webpack-plugin');
 
 module.exports = function (env) {
     const isForProd = env === 'production';
@@ -55,7 +55,7 @@ module.exports = function (env) {
         minimize: isForProd,
         minimizer: [
             new OptimizeCssAssetsPlugin({ cssProcessor: cssnano }),
-            new UglifyJsPlugin({
+            new TerserPlugin({
                 cache: !isForProd,
                 extractComments: {
                     // Separate license comments from the main bundle and add a comment explaining where to find them
@@ -65,7 +65,7 @@ module.exports = function (env) {
                 },
                 parallel: true,
                 sourceMap: true,
-                uglifyOptions: {
+                terserOptions: {
                     compress: true,
                     mangle: true
                 }