begrudgingly added babel-polyfill

.gitignore

@@ -4,6 +4,7 @@ public/upload.js
 public/download.js
 public/version.json
 public/l20n.min.js
+public/polyfill.min.js
 static/*
 !static/info.txt
 test/frontend/bundle.js

package-lock.json

@@ -263,6 +263,43 @@
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       }
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+      "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.23.0.tgz",
+      "integrity": "sha1-g2TKYt+Or7gwSZ9pkXdGbDsDSZ0=",
+      "dev": true,
+      "requires": {
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+        "core-js": "2.4.1",
+        "regenerator-runtime": "0.10.5"
+      },
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+          "integrity": "sha1-TekR5mew6ukSTjQlS1OupvxhjT4=",
+          "dev": true
+        }
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+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.25.0.tgz",
+      "integrity": "sha1-M7mOql1IK7AajRqmtDetKwGuxBw=",
+      "dev": true,
+      "requires": {
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+        "regenerator-runtime": "0.10.5"
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@@ -271,12 +308,12 @@
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@@ -917,65 +954,75 @@
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-                  "version": "https://registry.npmjs.org/esprima/-/esprima-3.0.0.tgz",
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@@ -1302,7 +1349,7 @@
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+          "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
           "dev": true,
           "requires": {
             "safe-buffer": "5.1.1"

package.json

@@ -17,6 +17,7 @@
     "redis": "^2.7.1"
   },
   "devDependencies": {
+    "babel-polyfill": "^6.23.0",
     "browserify": "^14.4.0",
     "eslint": "^4.3.0",
     "eslint-plugin-mocha": "^4.11.0",
@@ -79,7 +80,7 @@
     "build:upload": "browserify frontend/src/upload.js -g uglifyify -o public/upload.js",
     "build:download": "browserify frontend/src/download.js -g uglifyify -o public/download.js",
     "build:version": "node scripts/version",
-    "build:l10n": "cp node_modules/l20n/dist/web/l20n.min.js public",
+    "build:vendor": "cp node_modules/l20n/dist/web/l20n.min.js node_modules/babel-polyfill/dist/polyfill.min.js public",
     "dev": "npm run build && npm start",
     "format": "prettier '{frontend/src/,scripts/,server/,test/**/!(bundle)}*.js' 'public/*.css' --single-quote --write",
     "lint": "npm-run-all lint:*",

views/layouts/main.handlebars

@@ -12,6 +12,7 @@
 
   <link rel="icon" type="image/png" href="/resources/favicon-32x32.png" sizes="32x32" />
   <link rel="localization" href="/locales/{locale}/send.ftl">
+  <script src="/polyfill.min.js"></script>
   <script defer src="/l20n.min.js"></script>
 </head>
 <body>