use a regular for-loop intead of for-of

Polymer · Jan 29, 2019 · 86db24c · 86db24c
1 parent 3624a14
commit 86db24c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/legacy/class.js b/lib/legacy/class.js
@@ -45,7 +45,8 @@ const excludeOnBehaviors = Object.assign({
 function copyProperties(source, target, excludeProps) {
   const noAccessors = source._noAccessors;
   const propertyNames = Object.getOwnPropertyNames(source);
-  for (let p of propertyNames) {
+  for (let i = 0; i < propertyNames.length; i++) {
+    let p = propertyNames[i];
     if (p in excludeProps) {
       continue;
     }