Как перемешать строки текста в textarea на JQuery

$.fn.shuffleValueRows = function() { 
  var rows = this.val().trim().split('\n'); 
  var shuffled = shuffle(rows).join('\n'); 
  this.val(shuffled); 
  return this; 
   
  function shuffle(o) { 
    for(var j, x, i = o.length; i;  
      j = Math.random() * i |0,  
      x = o[--i],  
      o[i] = o[j],  
      o[j] = x); 
    return o; 
  }; 
} 
 
 
$(document).on('click', '.shuffleBtn', function() { 
  $($(this).data('selector')).shuffleValueRows(); 
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<textarea id="siteList" rows=5 style="width: 100%"> 
https://vk.com 
https://mail.google.com 
http://ru.stackoverflow.com 
http://enjoycss.com 
</textarea> 
 
<hr /> 
<button class="shuffleBtn" data-selector="#siteList">Shuffle!</button>

document.querySelector('#shuffle').addEventListener('click', _ => { 
  let textarea = document.querySelector('#siteList'); 
   
  textarea.value = textarea.value.split(`\n`).filter(_ => _).reduce((a, e) => (a.splice(Math.random() * (a.length + 1), 0, e), a), []).join(`\n`); 
  /*var chanks = textarea.value.split("\n"), 
      shuffled = []; 
   
  for(var i = 0; i < chanks.length; i++){ 
    var chank = chanks[i]; 
     
    if(/^\s*$/.test(chank)){ 
      continue; 
    } 
     
    shuffled.splice(Math.random() * (shuffled.length + 1), 0, chank); 
  } 
   
  textarea.value = shuffled.join("\n");*/ 
});

textarea{ 
  width: 250px; 
  height: 100px; 
}

<textarea id="siteList"> 
https://vk.com 
https://mail.google.com 
http://ru.stackoverflow.com 
http://enjoycss.com 
</textarea><br /> 
<input type='button' id='shuffle' value='Перемешать!' />