JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<meta charset="utf-8">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
   <link rel="stylesheet" href="http://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css" />
   <script src="http://code.jquery.com/jquery-1.8.3.js"></script>
   <script src="http://code.jquery.com/ui/1.9.2/jquery-ui.js"></script>
   <link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>  
   <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>  
   <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script> 


<title>UPN</title>

   <script type="text/javascript">
       $(function() {
               $("#datepicker").datepicker({ dateFormat: "dd.mm.yy" }).val()
       });
   </script>
   
<script>
   $(function() {
        var Prejemnik1 = [
            "Testni Test, Testni naslov 1, 1000 Test",
      "Testni Test, Testni naslov 2, 1000 Test",
      "Testni Test, Testni naslov 3, 1000 Test",
        ];
        $( "#prejemnik1" ).autocomplete({
            source: Prejemnik1
        });
    });
    
       $(function() {
        var Prejemnik2 = [
                    "Testni Test, Testni naslov 1, 1000 Test",
         "Testni Test, Testni naslov 2, 1000 Test",
          "Testni Test, Testni naslov 3, 1000 Test",
        ];
        $( "#prejemnik2" ).autocomplete({
            source: Prejemnik2
        });
    });
    
    $(function() {
        var Placniki1 = [
            "Testni Placnik, Testni naslov 1, 1000 Test",
         "Testni Placnik, Testni naslov 2, 1000 Test",
          "Testni Placnik, Testni naslov 3, 1000 Test",
        ];
        $( "#placniki1" ).autocomplete({
            source: Placniki1
        });
    });
    
        $(function() {
      var Placniki2 = [
          "Testni Test, Testni naslov 1, 1000 Test",
        ];
        $( "#placniki2" ).autocomplete({
            source: Placniki2
     ...