fix(data): skip recursive call if values are identical (#8967)

vuejs · Nov 30, 2018 · a7658e0 · a7658e0
1 parent 05001e6
commit a7658e0
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/core/util/options.js b/src/core/util/options.js
@@ -55,7 +55,11 @@ function mergeData (to: Object, from: ?Object): Object {
     fromVal = from[key]
     if (!hasOwn(to, key)) {
       set(to, key, fromVal)
-    } else if (isPlainObject(toVal) && isPlainObject(fromVal)) {
+    } else if (
+      toVal !== fromVal &&
+      isPlainObject(toVal) &&
+      isPlainObject(fromVal)
+    ) {
       mergeData(toVal, fromVal)
     }
   }