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Made isPlainObject() supporting null, undefined, and window values on IE too. Also added some related tests. Fixes #5669.

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Robert Katic 2009-12-19 00:34:20 +08:00 • committed by John Resig
parent 27d65b59f9
commit 148fb7ba8e
2 changed files with 20 additions and 5 deletions
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10
src/core.js
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@ -425,19 +425,21 @@ jQuery.extend({
},
isPlainObject: function( obj ) {
if ( toString.call(obj) !== "[object Object]" || typeof obj.nodeType === "number" ) {
// Must be an Object.
// Because of IE, we also have to check the presence of the constructor property.
if ( !obj || toString.call(obj) !== "[object Object]" || !("constructor" in obj) ) {
return false;
}
// not own constructor property must be Object
// Not own constructor property must be Object
if ( obj.constructor
&& !hasOwnProperty.call(obj, "constructor")
&& !hasOwnProperty.call(obj.constructor.prototype, "isPrototypeOf") ) {
return false;
}
//own properties are iterated firstly,
//so to speed up, we can test last one if it is own or not
// Own properties are enumerated firstly, so to speed up,
// if last one is own, then all properties are own.
var key;
for ( key in obj ) {}