Better polyfill for forEach in oldIE. See #8865.

highcharts · Sep 5, 2018 · 7078963 · 7078963
1 parent 0ee7dab
commit 7078963
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/js/modules/oldie.src.js b/js/modules/oldie.src.js
@@ -97,7 +97,10 @@ if (!Array.prototype.forEach) {
         var i = 0,
             len = this.length;
         for (; i < len; i++) {
-            if (fn.call(ctx, this[i], i, this) === false) {
+            if (
+                this[i] !== undefined && // added check
+                fn.call(ctx, this[i], i, this) === false
+            ) {
                 return i;
             }
         }