Load babel-polyfill only when necessary.

public/assets/babel-polyfill.js

@@ -0,0 +1,4 @@
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+if("root"===e.tryLoc)return handle("end");if(e.tryLoc<=this.prev){var u=i.call(e,"catchLoc"),c=i.call(e,"finallyLoc");if(u&&c){if(this.prev<e.catchLoc)return handle(e.catchLoc,!0);if(this.prev<e.finallyLoc)return handle(e.finallyLoc)}else if(u){if(this.prev<e.catchLoc)return handle(e.catchLoc,!0)}else{if(!c)throw new Error("try statement without catch or finally");if(this.prev<e.finallyLoc)return handle(e.finallyLoc)}}}},abrupt:function(t,n){for(var r=this.tryEntries.length-1;r>=0;--r){var e=this.tryEntries[r];if(e.tryLoc<=this.prev&&i.call(e,"finallyLoc")&&this.prev<e.finallyLoc){var o=e;break}}o&&("break"===t||"continue"===t)&&o.tryLoc<=n&&n<=o.finallyLoc&&(o=null);var u=o?o.completion:{};return u.type=t,u.arg=n,o?this.next=o.finallyLoc:this.complete(u),p},complete:function(t,n){if("throw"===t.type)throw t.arg;"break"===t.type||"continue"===t.type?this.next=t.arg:"return"===t.type?(this.rval=t.arg,this.next="end"):"normal"===t.type&&n&&(this.next=n)},finish:function(t){for(var n=this.tryEntries.length-1;n>=0;--n){var r=this.tryEntries[n];if(r.finallyLoc===t)return this.complete(r.completion,r.afterLoc),resetTryEntry(r),p}},catch:function(t){for(var n=this.tryEntries.length-1;n>=0;--n){var r=this.tryEntries[n];if(r.tryLoc===t){var e=r.completion;if("throw"===e.type){var i=e.arg;resetTryEntry(r)}return i}}throw new Error("illegal catch attempt")},delegateYield:function(t,n,r){return this.delegate={iterator:values(t),resultName:n,nextLoc:r},p}}}("object"==typeof t?t:"object"==typeof window?window:"object"==typeof self?self:this)}).call(this,"undefined"!=typeof global?global:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{})},{}]},{},[1]);

public/assets/polyfill.js

@@ -0,0 +1,10 @@
+// stupid old browsers
+if(typeof Promise === 'undefined') {
+  (function(d, script) {
+    script = d.createElement('script');
+    script.type = 'text/javascript';
+    script.async = false;
+    script.src = '/assets/babel-polyfill.js';
+    d.getElementsByTagName('head')[0].appendChild(script);
+  }(document));
+}

public/assets/styles.css

@@ -56,6 +56,7 @@ td.file-icon {
 }
 h1 .fa-icon {
   height: 50px;
+  width: 50px;
   vertical-align: middle;
 }
 .btn .fa-icon.fa-fw {

public/html/admin.html

@@ -7,6 +7,17 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="robots" content="noindex,nofollow">
   <link href="/assets/styles.css" rel="stylesheet">
+  <script>
+    if(typeof Promise === 'undefined') {
+      (function(d, script) {
+        script = d.createElement('script');
+        script.type = 'text/javascript';
+        script.async = false;
+        script.src = '/assets/babel-polyfill.js';
+        d.getElementsByTagName('head')[0].appendChild(script);
+      }(document));
+    }
+  </script>
 </head>
 
 <body>

public/html/download.html

@@ -7,6 +7,17 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="robots" content="noindex,nofollow">
   <link href="/assets/styles.css" rel="stylesheet">
+  <script>
+    if(typeof Promise === 'undefined') {
+      (function(d, script) {
+        script = d.createElement('script');
+        script.type = 'text/javascript';
+        script.async = false;
+        script.src = '/assets/babel-polyfill.js';
+        d.getElementsByTagName('head')[0].appendChild(script);
+      }(document));
+    }
+  </script>
 </head>
 
 <body>

public/html/error.html

@@ -6,7 +6,7 @@
   <link href="/assets/favicon.ico" rel="icon" type="image/x-icon"/>
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="robots" content="noindex,nofollow">
-  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
+  <link href="/assets/styles.css" rel="stylesheet">
   <style>
     html {
       position: relative;

public/html/upload.html

@@ -7,6 +7,17 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="robots" content="noindex,nofollow">
   <link href="/assets/styles.css" rel="stylesheet">
+  <script>
+    if(typeof Promise === 'undefined') {
+      (function(d, script) {
+        script = d.createElement('script');
+        script.type = 'text/javascript';
+        script.async = false;
+        script.src = '/assets/babel-polyfill.js';
+        d.getElementsByTagName('head')[0].appendChild(script);
+      }(document));
+    }
+  </script>
 </head>
 
 <body>