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Core: restore enumeration behavior in isPlainObject

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Fixes gh-2968
Close gh-2970
This commit is contained in:
Timmy Willison 2016-03-03 18:29:45 -05:00
parent bb235ed3b4
commit 00575d4d8c
2 changed files with 20 additions and 5 deletions
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9
src/core.js
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@ -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 ) {

16
test/unit/core.js
View File

@ -286,13 +286,21 @@ QUnit.test( "type for `Symbol`", function( assert ) {
});
QUnit.asyncTest( "isPlainObject", function( assert ) {
assert.expect( 15 );
assert.expect( 19 );
var pass, iframe, doc,
var pass, iframe, doc, parentObj, childObj, deep,
fn = function() {};
// The use case that we want to match
assert.ok( jQuery.isPlainObject( {} ), "{}" );
assert.ok( jQuery.isPlainObject( new window.Object() ), "new Object" );
parentObj = { foo: "bar" };
childObj = Object.create( parentObj );
assert.ok( !jQuery.isPlainObject( childObj ), "isPlainObject(Object.create({}))" );
childObj.bar = "foo";
assert.ok( !jQuery.isPlainObject( childObj ), "isPlainObject(Object.create({}))" );
// Not objects shouldn't be matched
assert.ok( !jQuery.isPlainObject( "" ), "string" );
@ -320,6 +328,10 @@ QUnit.asyncTest( "isPlainObject", function( assert ) {
// Again, instantiated objects shouldn't be matched
assert.ok( !jQuery.isPlainObject( new fn() ), "new fn" );
// Deep object
deep = { "foo": { "baz": true }, "foo2": document };
assert.ok( jQuery.isPlainObject( deep ), "Object with objects is still plain" );
// DOM Element
assert.ok( !jQuery.isPlainObject( document.createElement( "div" ) ), "DOM Element" );