3.JSON对象

<script>
       //声明JSON对象
       //{key：value}{键：值}
       //在js中key的引号可以省略
       var ming={
           "name":"ming",
           "sex":"女",
           "age":18
       }
       var chen={
           name:"chen",
           age:18,
           sex:"男"
       }
    //读取Json的值
    console.log(ming.name)
    console.log(chen)
    //给对象添加属性
    ming.skill="js"
    console.log(ming)
   </script>