javascript - Laravel 5 how to get controller display simple message box or alert? -

cannot find solution simple problem, voting app, , if users votes show simple alert "thanks" , cannot find way controller? have tried simple jquery code it's not working.

echo "<script>alert('you have voted');</script>";  

any simple solutions?

public function voting() {     $ip=$_server['remote_addr'];     $id = input::get('msg_id');     $vote = input::get('vote');     $count = voting::wheremes_id_fk($id)->whereip_add($ip)->count();      if($count==0)     {         if($vote == "up")         {             project::whereid($id)->increment('up');              voting::insert(                 array('mes_id_fk' => $id, 'ip_add' => $ip )             );         }         else if ($vote=="down") {              project::whereid($id)->decrement('down');              voting::insert(                 array('mes_id_fk' => $id, 'ip_add' => $ip )             );         }     }      else {         // how popup "thanks" alert??     } } 

if using ajax vote, return json response , use javascript respond json response.

example:

public function vote() {   //your voting code   return response::json(['success'=>true]); } 

and in javascript, check json

$.post('/vote/', { id: 123   }, function(data){     if(data.success== true)     {       alert('thanks voting);     } } 

if not using ajax, use session flash.

i.e., controller,

public function vote() {   //your voting code   session::flash('msg', 'thanks voting');  return redirect::back(); } 

and view,

@if(session::has('msg'))   {{session::get('msg')}} @endif