add polyfill for NodeList.prototype.forEach (unsupported in Internet Explorer)

2 files changed, 8 insertions, 0 deletions

diff --git a/app/assets/javascripts/commons/polyfills.js b/app/assets/javascripts/commons/polyfills.js
index bc3e741f524..b78089525cc 100644
--- a/app/assets/javascripts/commons/polyfills.js
+++ b/app/assets/javascripts/commons/polyfills.js
@@ -12,3 +12,4 @@ import 'core-js/fn/symbol';
 // Browser polyfills
 import './polyfills/custom_event';
 import './polyfills/element';
+import './polyfills/nodelist';
diff --git a/app/assets/javascripts/commons/polyfills/nodelist.js b/app/assets/javascripts/commons/polyfills/nodelist.js
new file mode 100644
index 00000000000..3772c94b900
--- /dev/null
+++ b/app/assets/javascripts/commons/polyfills/nodelist.js
@@ -0,0 +1,7 @@
+if (window.NodeList && !NodeList.prototype.forEach) {
+  NodeList.prototype.forEach = function forEach(callback, thisArg = window) {
+    for (let i = 0; i < this.length; i += 1) {
+      callback.call(thisArg, this[i], i, this);
+    }
+  };
+}