Only fix prototype when registering at first create time.

Polymer · Mar 22, 2016 · 7ad2bff · 7ad2bff
1 parent 4834651
commit 7ad2bff
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/lib/base.html b/src/lib/base.html
@@ -70,7 +70,7 @@
         proto._doBehavior('registered');
         // where prototypes are simulated (IE10), element instance
         // must be specfically fixed up.
-        if (settings.usePolyfillProto) {
+        if (settings.usePolyfillProto && proto !== this) {
           proto.extend(this, proto);
         }
       }