diff --git a/static/js/app.js b/static/js/app.js
index b6a8470c7a..2d1fb7508b 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -2,6 +2,20 @@
   'use strict'
 
   // Methods/polyfills.
+  if (!Element.prototype.matches) {
+    Element.prototype.matches =
+      Element.prototype.matchesSelector ||
+      Element.prototype.mozMatchesSelector ||
+      Element.prototype.msMatchesSelector ||
+      Element.prototype.oMatchesSelector ||
+      Element.prototype.webkitMatchesSelector ||
+        function (s) {
+          var matches = (this.document || this.ownerDocument).querySelectorAll(s)
+          var i = matches.length
+          while (--i >= 0 && matches.item(i) !== this) {}
+          return i > -1
+        }
+  }
 
   // addEventsListener
   var addEventsListener = function (o, t, e) {