random alphabet javascript

// Generate a random alphanumerical string of length 11 ( change substring parameter for other length)
Math.random().toString(36).substring(2);function makeid() {
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for (var i = 0; i < 5; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

console.log(makeid());
 Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);Math.random().toString(36).substr(2, 5);function getRandomText(length) {
  var charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".match(/./g);
  var text = "";
  for (var i = 0; i < length; i++) result += charset[Math.floor(Math.random() * charset.length)];
  return text;
}