CLDC-1057: add polyfills

app/webpacker/packs/application.js

@@ -2,6 +2,7 @@
 // present in this directory. You're encouraged to place your actual application logic in
 // a relevant structure within app/javascript and only use these pack files to reference
 // that code so it'll be compiled.
+require("@babel/polyfill")
 require.context('govuk-frontend/govuk/assets')
 
 import '../styles/application.scss'

babel.config.js

@@ -21,7 +21,10 @@ module.exports = function(api) {
         '@babel/preset-env',
         {
           targets: {
-            node: 'current'
+            node: 'current',
+            browsers: [
+              'ie >= 10'
+            ]
           }
         }
       ],
@@ -32,7 +35,13 @@ module.exports = function(api) {
           useBuiltIns: 'entry',
           corejs: 3,
           modules: false,
-          exclude: ['transform-typeof-symbol']
+          exclude: ['transform-typeof-symbol'],
+          targets: {
+            node: 'current',
+            browsers: [
+              'ie >= 10'
+            ]
+          }
         }
       ]
     ].filter(Boolean),

package.json

@@ -6,6 +6,7 @@
   },
   "dependencies": {
     "@activeadmin/activeadmin": "^2.9.0",
+    "@babel/polyfill": "^7.12.1",
     "@hotwired/stimulus": "^3.0.0",
     "@hotwired/stimulus-webpack-helpers": "^1.0.1",
     "@hotwired/turbo": "^7.1.0",