how to change string to json in javascript code example

Example 1: javascript parse json

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

Example 2: json_decode javascript

JSON.parse(jsonToDecode)

Example 3: js string to json

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