how to convert normal object to json object in javascript code example

Example 1: Javascript object to JSON string

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

Example 2: javascript parse json

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

Example 3: 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;

Example 4: how to convert json to javascript object

local storage JSON.parse