how to convert json to javascript object

1var obj = {name: "Martin", age: 30, country: "United States"};
2 
3// Converting JS object to JSON string
4var json = JSON.stringify(obj);
5 
6console.log(json);
7// Prints: {"name":"Martin","age":30,"country":"United States"} 
8"https://www.tutorialrepublic.com/faq/how-to-convert-js-object-to-json-string.php"

1var person={"first_name":"Tony","last_name":"Hawk","age":31};
2var personJSONString=JSON.stringify(person); 

1var jsonPerson = '{"first_name":"billy", "age":23}';
2var personObject = JSON.parse(jsonPerson); //parse json string into JS object

1const json = '{ "fruit": "pineapple", "fingers": 10 }';
2const obj = JSON.parse(json);
3console.log(obj.fruit, obj.fingers);

1
2
3  var obj = { name: "John", age: 30, city: "New York" };
4var myJSON = 
5  JSON.stringify(obj);
6document.getElementById("demo").innerHTML = myJSON; 

1local storage JSON.parse