#判断js对象是否为空
// jquery的isEmptyObject方法
function isEmptyObject(e) {
var t;
for (t in e)
return !1;
return !0
}
console.log($.isEmptyObject({"re": 2})); //false
console.log(isEmptyObject()); //true
console.log(isEmptyObject({})); //true
console.log(isEmptyObject(null)); //true
console.log(isEmptyObject(23)); //true
console.log(isEmptyObject({"te": 2})); //false
Object.getOwnPropertyNames(a).length === 0
#获取js对象属性个数
Object.getOwnPropertyNames(a).length