// base code ----------------------------------------------------------
object["property"] = value;
// or
object.property = value;
// exampel : ----------------------------------------------------------
var myJson = { name: "mamad", family: "mirzaei" }
// i wana to add age
myJson.age = 26
// log =>
console.log( "myJson >>:" ,myJson)
// resalt =>
{ name: "Mamad", family: "Mirzaei", age : 26 }
json = JSON.stringify(jsObj);
console.log(json)