From 00575d4d8c7421c5119f181009374ff2e7736127 Mon Sep 17 00:00:00 2001 From: Timmy Willison Date: Thu, 3 Mar 2016 18:29:45 -0500 Subject: Core: restore enumeration behavior in isPlainObject Fixes gh-2968 Close gh-2970 --- src/core.js | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'src') diff --git a/src/core.js b/src/core.js index b10128c7a..17673dfac 100644 --- a/src/core.js +++ b/src/core.js @@ -225,6 +225,7 @@ jQuery.extend( { }, isPlainObject: function( obj ) { + var key; // Not plain objects: // - Any object or value whose internal [[Class]] property is not "[object Object]" @@ -239,9 +240,11 @@ jQuery.extend( { return false; } - // If the function hasn't returned already, we're confident that - // |obj| is a plain object, created by {} or constructed with new Object - return true; + // Own properties are enumerated firstly, so to speed up, + // if last one is own, then all properties are own + for ( key in obj ) {} + + return key === undefined || hasOwn.call( obj, key ); }, isEmptyObject: function( obj ) { -- cgit v1.2.3