<script type="text/javascript">
var obj={"name":"aaa"}
if( typeof(obj)=="object" ){
alert("它是object");
}
</script>
1、for in 循环
eg:var obj = {}
var b = function () {
for (var key in obj) {
return false
}
return true
}
console.log(b()) // true
2、对象序列化(将对象转换为字符串)后进行判断
eg:var data = {}
var b = (JSON.stringify(data) == "{}")
console.log(b) // true
3、jquery的isEmptyObject()方法
eg: var data = {}
var b = $.isEmptyObject(data)
console.log(b) // true
4、Object.getOwnPropertyNames()方法
eg: var data = {}
var arr = Object.getOwnPropertyNames(data)
console.log(arr.length == 0) // true
5、ES6中的Object.keys()方法
eg: var data = {}
var arr = Object.keys(data)
console.log(arr.length == 0) // true