var obj = {						user_id: "that.user_id",						auth_id: "that.auth_id",						token: "that.token",						id: "that.bigData.id",						v_type: "that.bigData.v_type",					}                    //新增key，动态改值					var key = "demo";					obj[key] = "text";                    //修改key的value值					obj["id"] = "22222222";					console.log(JSON.stringify(obj))