observer: modify '__ob__' property checking

kazupon · kazupon · commit 15df1bcaa949 · 2015-11-09T11:24:13.000+09:00
diff --git a/src/observer/index.js b/src/observer/index.js
@@ -47,7 +47,7 @@ Observer.create = function (value, vm) {
   }
   var ob
   if (
-    '__ob__' in value &&
+    Object.prototype.hasOwnProperty.call(value, '__ob__') &&
     value.__ob__ instanceof Observer
   ) {
     ob = value.__ob__

Original file line number	Diff line number	Diff line change
`@@ -47,7 +47,7 @@ Observer.create = function (value, vm) {`
`47`	`47`	`}`
`48`	`48`	`var ob`
`49`	`49`	`if (`
`50`		`- '__ob__' in value &&`
	`50`	`+ Object.prototype.hasOwnProperty.call(value, '__ob__') &&`
`51`	`51`	`value.__ob__ instanceof Observer`
`52`	`52`	`) {`
`53`	`53`	`ob = value.__ob__`