verify first step for handsome checkout page

verify_step.js

jQuery(document).ready(function($){
    var btn = $('.hcc-t5-step-1 .btn-step2');
    if( btn.length == 0 ) btn = $('.btn-step1');
    btn.before('<style>.btn-step1-wrapper{display:none;} .hcc-t6-step-1 .btn-step1-wrapper{margin-top: 20px; margin-bottom: 27px; display:block;} .hcc-step-1 .btn-step1,.hcc-step-2 .btn-step1, .hcc-step-2 .btn-step1-wrapper, .hcc-t5-step-2 .btn-step1-wrapper, .hcc-t5-step-3 .btn-step1-wrapper,.hcc-t5-step-1 .btn-step2, .hcc-t6-step-1 .btn-step1{display:none !important;}</style>');
    btn.after('<button class="btn btn-success btn-lg wizard-button btn-block btn-step1-wrapper">'+btn.html()+'</button>');
    $('.btn-step1-wrapper').on("click", function(event){
         var inputs = $('.validate-required:visible').find('input');
         var ready = true;
         var messages = [];
         inputs.each(function(i, item){
              var input = $(item);
              if(input.length && input.val() == ''){
                  messages.push(input.attr('name'));
                  ready = false;
              }
         });
         var inputs = $('.validate-required:visible').find('select');
         inputs.each(function(i, item){
              var input = $(item);
              if(input.length && input.val() == ''){
                  messages.push(input.attr('name'));
                  ready = false;
              }
         });
         if(ready) { 
              $('form .woocommerce-NoticeGroup-checkout').remove();
              btn.trigger('click');
         } else {
              $('form .woocommerce-NoticeGroup-checkout').remove();
              $('form.woocommerce-checkout').prepend('<div class="woocommerce-NoticeGroup-checkout"><ul class="woocommerce-error"><ul><div>');
              var errors = $('.woocommerce-checkout .woocommerce-error');
              for(var e = 0; e < messages.length; e++){
                     //var i = 0;
                     //var msg = messages[e].replace(/(.)/g, function($1) {
                     //   if(i == 0) $1 = $1.toUpperCase(); i++;
                     //   if($1 == '_') {i = 0; $1 = ' ';}
                     //   return $1; 
                     //});
                     var msg = $('label[for='+messages[e]+']').html();
                     if(msg.length){
                          msg = msg.replace(/<\/?[^>]+(>|$)/g, "").replace('*', '');
                     errors.append("<li><strong>Billing "+msg+"</strong> is a required field.</li>");
                     }
              }
              if(messages.length) $('input[name="'+messages[0]+'"]').focus();
              event.stopPropagation();
         }
         
    }); 
    
    if( $('.hcc-embed-form-wrapper .steps').length > 0){
        $('body').addClass('hcc-step-1');
        
        $('.btn-step1').on('click', function(){
            $('body').addClass('hcc-step-2').removeClass('hcc-step-1');
        });
        
        $('.steps .step1, .link-back1').on('click', function() { 
            $('body').addClass('hcc-step-1').removeClass('hcc-step-2');
        });
    }
});