Add formdata-polyfill

app/assets/javascripts/commons/polyfills.js

@@ -14,6 +14,7 @@ import 'core-js/es6/weak-map';
 // Browser polyfills
 import 'classlist-polyfill';
+import 'formdata-polyfill';
 import './polyfills/custom_event';
 import './polyfills/element';
 import './polyfills/event';

package.json

@@ -53,6 +53,7 @@
     "emoji-unicode-version": "^0.2.1",
     "exports-loader": "^0.7.0",
     "file-loader": "^1.1.11",
+    "formdata-polyfill": "^3.0.11",
     "fuzzaldrin-plus": "^0.5.0",
     "glob": "^7.1.2",
     "imports-loader": "^0.8.0",

yarn.lock

@@ -3211,6 +3211,10 @@ form-data@~2.3.0, form-data@~2.3.1:
     combined-stream "1.0.6"
     mime-types "^2.1.12"
+formdata-polyfill@^3.0.11:
+  version "3.0.11"
+  resolved "https://registry.yarnpkg.com/formdata-polyfill/-/formdata-polyfill-3.0.11.tgz#c82b4b4bea3356c0a6752219e54ce1edb2a7fb5b"
+
 forwarded@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.1.2.tgz#98c23dab1175657b8c0573e8ceccd91b0ff18c84"