JAVASCRIPT

json parse

var obj = ...;
var json = JSON.stringify(obj);  
var obj2 = JSON.parse(json);

json parse returns object

    var str = '[{"UserName":"xxx","Rolename":"yyy"}]'; // your response in a string
    var parsed = JSON.parse(str); // an *array* that contains the user
    var user = parsed[0];         // a simple user
    console.log(user.UserName);   // you'll get xxx
    console.log(user.Rolename);   // you'll get yyy

json.parse

//JSON.parse()
const json = "{"name": "Example", "age": 50}";
let parsed_json = JSON.parse(json);
console.log(`Name: ${parsed_json.name}; Age: ${parsed_json.age}`)
// Returns "Name: Example; Age: 50"

what does json.parse do

The JSON.parse() method parses a JSON string, constructing the JavaScript value or object described by the string. An optional reviver function can be provided to perform a transformation on the resulting object before it is returned.

json parse

JSON.parse(data)

parse json

const parseJSON = (json) => {
  return new Function('return ' + json)();
};