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":{"provice":"shanxi","city":"xian"}}//类型：stringvar a = '{"name":"yfs","age":28,"boy":true,"language":["chinese","english"],"address":{"provice":"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