<div class="box">
<div class="filterreset">СБРОСИТЬ</div>
<br>
                       <div class="filter">
                            <select>
                                <option value="" select="selected">default</option>
                                <option value="c">первый</option>
                                <option value="d">второй</option>
                                <option value="e">третий</option>
                            </select>
                         <br>
                            <select>
                                <option value="" select="selected">default</option>
                                <option value="c">первый</option>
                                <option value="d">второй</option>
                                <option value="e">третий</option>
                            </select>
                         <br>
                            <label class="check">в наличии
                                <input type="checkbox" id="checkbox">
                                <span class="checkmark"></span>
                            </label>
                      </div>
</div>    

.filterreset{
  display:none;
}
.active{
    background: #cc0000;
  color:#fff;
}
#checkbox.active{
    background: #cc0000;
}

/*$( ".folter" ).each(function() {
  $( this ).addClass( "foo" );
});*/

        //filter select
        $('.filter select').on('change', function () {
            if ($(this).val() != "") {
                $(this).addClass('active');
            } else {
                $(this).removeClass('active');
            }
        });

//check
$('#checkbox').click(function(){
  if ($(this).is(':checked')){
    $(this).parent().addClass('active');
  } else {
    $(this).parent().removeClass('active'); 
  }
});

function handleFormChange() {
  const isCheckboxChecked = $('.box input[type="checkbox"]').prop('checked');
  const isSelectionMade = (function () {
      let result = false;
      $('.box select').each(function () {
        if ($(this).val() !== '') result = true;
      });
      return result;
  })();
  if (isCheckboxChecked || isSelectionMade) {
    $('.filterreset').show();
  } else {
    $('.filterreset').hide();
  }
}
$(document).on('change', '.box', handleFormChange);