Get jsonp

script.js

function serialize(obj, prefix){
  var props = [];
  for (var p in obj){
    if (obj.hasOwnProperty(p)){
      if (Object.prototype.toString.call(obj[p]) === '[object Object]'){
        props.push(serialize(obj[p], (prefix ? prefix : '') + p + '.'));
      }else{
        props.push((prefix ? prefix : '') + encodeURIComponent(p) + '=' + encodeURIComponent(obj[p]));
      }
    }
  }
  return props.join('&');
}

function getJsonp(path, data, callback, parser){
  var id = new Date().getTime(),
    callbackFuncName = 'jsonpCallback' + id,
    script = document.createElement('script'),
    timeOutMonitor;
  
  window[callbackFuncName] = function (data, status, statusText){
    clearTimeout(timeOutMonitor);
    callback(parser ? parser(data) : data);
    delete window[callbackFuncName];
    var s = document.getElementById(id);
    s.parentNode.removeChild(s);
  }
  
  if (data){path += (path.indexOf('?') > -1 ? '&' : '?') + serialize(data);}
  path = path + (path.indexOf('?') > -1 ? '&' : '?') + 'callback=' + callbackFuncName;
  
  timeOutMonitor = setTimeout(function (){
    console.error('>>> ERROR JSONP on URL: ' + path + ' > STATUS: (send timeout)');
    callback(null, {code: 0, message: 'Timeout error'});
    delete window[callbackFuncName];
    var s = document.getElementById(id);
    s.parentNode.removeChild(s);
  }, 30000);
  
  script.id = id;
  script.src = path;
  document.getElementsByTagName('head')[0].appendChild(script);
}

getJsonp(
  'https://itunes.apple.com/search', 
  {term:'Michel Telo Humilde Residencia', country:'BR', media:'music', entity:'musicTrack'}, 
  function (d){
    console.log(d);
  }
);