text: $(document).ready(function() {
      var text_max = 300;
      $('#textarea_feedback').html(text_max + ' Caracteres restantes');
  
      $('#textarea').keyup(function () {
          var text_length = $('#textarea').val().length;
          var text_remaining = text_max - text_length;
  
          $('#textarea_feedback').html(text_remaining + ' Caracteres restantes');
      });
  });