Answers for "parse complex json javascript"

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

jsonl parser javascript

function jsonlParser(jsonl) {
  return jsonl
    .split("\n")
    .filter(function (s) { return s !== ""; })
    .map(function (str) { return JSON.parse(str); });
};