JSON 可以用 .push() 添加新数据
var json =[
{ title:"1",content:"Tom" },
{ title:"2",content:"Jack" }
];
json.push({ "title":"3","content":"CC"});
console.log(json);
// 输出 [Object, Object, Object]
JSON 转字符串
JSON.stringify(json)
字符串转 JSON
JSON.parse(String);