Answers for "create json from string"

Javascript object to JSON string

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

json to string

const myJSON = JSON.stringify(obj);

javascript parse json

var jsonPerson = '{"first_name":"billy", "age":23}';
var personObject = JSON.parse(jsonPerson); //parse json string into JS object

js string to json

var obj = JSON.parse("{no:'u',my:'sql'}");//returnes {no:'u',my:'sql'}

change to json string

var obj =
  { name: "John", today: new Date(), city : "New York" };

  var myJSON = JSON.stringify(obj);

  
document.getElementById("demo").innerHTML = myJSON;