Строка узла в JSON
const json = '{"result":true, "count":42}';
const obj = JSON.parse(json);
Annoyed Antelope
const json = '{"result":true, "count":42}';
const obj = JSON.parse(json);var jsonPerson = '{"first_name":"billy", "age":23}';
var personObject = JSON.parse(jsonPerson); //parse json string into JS objectJSON.parse('{"name":"John", "age":30, "city":"New York"}') 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