https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON

js数据类型：

字符串、数字、布尔、数组、对象、Null、Undefined

js Object

var data = {

"name":"yfs",

"age":28,

"boy":true,

"language":["chinese", "english"],

"address":{

"provice":"shanxi",

"city":"xian"

}

};

JSON.stringify();

var jsonString = JSON.stringify(data);

console.log(jsonString);

console.log(typeof(jsonString));

//结果：

{"name":"yfs","age":28,"boy":true,"language":["chinese","english"],"address":{"p

rovice":"shanxi","city":"xian"}}

//类型：string

var a = '{"name":"yfs","age":28,"boy":true,"language":["chinese","english"],"address":{"p

rovice":"shanxi","city":"xian"}}';

JSON.parse();

var jsObject = JSON.parse(jsonString);

console.log(jsObject);

console.log(typeof(jsObject));

//结果：

{ name: 'yfs',

age: 28,

boy: true,

language: [ 'chinese', 'english' ],

address: { provice: 'shanxi', city: 'xian' } }

//类型：object