Добавляем маску ввода телефона с подключением префиксов стран

HTML

             <div class="input-group tel">
                <input class="input-group__field input__field-phone" type="tel" autocomplete="off" required="" name="customer_telephone_visible" value="<?php echo $telephone; ?>" placeholder="___ ___-__-__" data-intl-tel-input-id="0">
                <input type="hidden" name="telephone" id="customer_telephone" value="<?php echo $telephone; ?>" data-mask="999 999 99 99" required="required">
                <label class="input-group__title">Телефон</label>
                <?php if ($error_telephone) { ?>
                <div class="text-danger"><?php echo $error_telephone; ?></div>
                <?php } ?>
            </div>

JAVA SCRIPT

	var store_code = 'ru';
	// Маска для телефона
  function phone_mask_simple(item){
      $.mask.definitions['d']='[0-9]';
      // $(item).mask("ddd-ddd-dd-dd");
      var iti = window.intlTelInput(item, {
          autoPlaceholder:"aggressive",
          placeholderNumberType:"MOBILE",
          preferredCountries: ['ru', 'ua', 'kz', 'by'],
          separateDialCode:true,
          initialCountry: store_code,
          utilsScript: "https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/17.0.12/js/utils.min.js",
          customPlaceholder:function(selectedCountryPlaceholder,selectedCountryData){
              return selectedCountryPlaceholder.replace(/[0-9]/g,'_');;
          },
      });
      iti.promise.then(function() {
          var mask = $(item).attr('placeholder').replace(/[_]/g,'d');
          $(item).mask(mask, {
              onChange: function(cep){
                  console.log('cep changed! ', cep);
              },
          });
      });
      $(item).focus();
      var real_phone = $(item).parents('.input-group.tel').find('[type="hidden"]').val();
      iti.setNumber(real_phone);
      $(item).on("change",function(){
        var real_number = iti.getNumber();
        var real_number_input = $(item).parents('.input-group.tel').find('[type="hidden"]');
        if (real_number_input.length) {
          real_number_input.val(real_number);
        }
      });
      $(item).on("close:countrydropdown",function(e,countryData){
          $(this).val('');
          // var mask=$(this).closest('.intl-tel-input').find('.selected-dial-code').html()+' '+$(this).attr('placeholder').replace(/[0-9]/g,'d');
          var mask = $(item).attr('placeholder').replace(/[_]/g,'d');
          $(item).mask(mask, {
              onChange: function(cep){
                  console.log('cep changed! ', cep);
              },
          });
      });
 }
  var inputs = document.querySelectorAll(".input__field-phone");
  inputs.forEach(function(item, i, array){
    item.addEventListener('focus', function() {
      var iti = window.intlTelInputGlobals.getInstance(item);
      if(!iti){
        phone_mask_simple(item);
      }
    });
  });