原生js方法：

var a = {a1:"a1",a2:"a2"};
var b = {b1:"b1",b2:"b2"};
for(var item in b){
    a[item] = b[item];
}
此时
a={a1: "a1", a2: "a2", b1: "b1", b2: "b2"}

Object.assign() 方法

var o1 = {a:1};
var o2 = {b:2};
var o3 = {c:3};
var obj = Object.assign(o1,o2,o3);

Jquery继承的方法,可以直接用

a={'a':1};
b={'b':1};
c=$.extend(a,b)或c=$.extend({},a,b)