JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" class="um_frm">
<input type="text" class="um_frm">
<input type="text" class="um_frm">    
<input type="button" id="um_ok" value="click">

JavaScript

$('#um_ok').on( 'click', function() {

    var status='ok';
    $('.um_frm').each(function(){
         if ($.trim($(this).val()) == '') 
             {
                status='bad';

             }
     
     });
    if(status=='ok')
    {
         
      alert("all r ok");
        
    }
   else
   {
       alert("sumthng missing");
        
   }
});