$(".new-tweet-form button").click(function(e){
  e.preventDefault();

  var tweet = $('.new-tweet-form textarea').val();

  $(".timeline").prepend('<div class="panel panel-default"><div class="panel-heading"><div class="panel-title"> John Doe <div class="handle">@JohnDoeOfficial</div></div></h3></div><div class="panel-body">' + tweet +"</div></div>")
});