- for in 循环判断
var obj = {};
var result = function() {
for(var key in obj) {
return false;
}
return true;
} - 将json对象转化为json字符串,再判断该字符串是否为"{}"
var data = {};
var result = (JSON.stringify(data) == "{}");
- jquery的isEmptyObject方法
var data = {};
var result = $.isEmptyObject(data);
- Object.getOwnPropertyNames()方法
var data = {};
var arr = Object.getOwnPropertyNames(data);
alert(arr.length == 0);//true
- ES6的Object.keys()方法
var data = {};
var arr = Object.keys(data);
alert(arr.length == 0);//true