Answers for "convert any object to json injs"

Javascript object to JSON string

var person={"first_name":"Tony","last_name":"Hawk","age":31};
var personJSONString=JSON.stringify(person);

how to convert normal object to json object in javascript

var obj = { name: "John", age: 30, city: "New York" };
var myJSON = 
  JSON.stringify(obj);
document.getElementById("demo").innerHTML = myJSON;