js json to object

// Imagine we received this text from a web server:
'{ "name":"John", "age":30, "city":"New York"}'

// To convert text into a JavaScript object, use the JavaScript function JSON.parse():
var obj = JSON.parse('{ "name":"John", "age":30, "city":"New York"}');

// OR
var string = '{ "name":"John", "age":30, "city":"New York"}';
var obj = JSON.parse(string);

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

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

JSON.parse()

var objJson1 = JSON.parse(JSON.stringify(objNotJson1));

var jsonArray = '{"required":1, "minlength":2}'
var jsonParsedArray = JSON.parse(jsonArray);
for (key in jsonParsedArray) {
  if (jsonParsedArray.hasOwnProperty(key)) {
      console.log("%c "+key + " = " + jsonParsedArray[key],"color:cyan");
  }
}

var myObj, x;
myObj = {"name":"John", "age":30, "car":null};
x = myObj.name;
document.getElementById("demo").innerHTML = x;

local storage JSON.parse