main.js

$(document).ready(function(){

  $('.catalog').owlCarousel({
      margin:20,
      lazyLoad:true,
      dots:true,
      responsive:{
          0:{
              items:1
          },
          365:{
              items:2
          },
          992:{
              items:4
          }
      }
  });


  let paramString = document.location.search;
    let searchParams = new URLSearchParams(paramString);

    if (searchParams.has("sortby") && searchParams.has("sortdir")) {

        let sortdir = searchParams.get("sortdir");
        let sortby = searchParams.get("sortby");

        if ((sortdir=="asc")&&(sortby=="price")){
            $("#select_sort option[value='1']").attr("selected", "selected");
        }
        if ((sortdir=="desc")&&(sortby=="price")){
            $("#select_sort option[value='2']").attr("selected", "selected");
        }
    }

    if (searchParams.has("price_from") && searchParams.has("price_to")) {
        let price_from = searchParams.get("price_from");
        let price_to = searchParams.get("price_to");

        $('#price_from').val(price_from);
        $('#price_to').val(price_to);
    }

});

$(document).on('af_complete', function(event, response){
    var form = response.form;
    if (response.success) {
        if (form.attr('id') == 'formCallback') {
            $('#formCallback').modal('hide');
            $('#formModal2').modal('show');
        }
    }
});

function start_filter() {
    let sort=$('#select_sort').val();
    let get_string="?";

    if (sort>0) {
        switch (sort) {
            case "1" :
                get_string += "sortby=price&sortdir=asc";
                break;
            case "2" :
                get_string += "sortby=price&sortdir=desc";
                break;
            default:
                alert("Нет таких вариантов сортировки");

        }

        let price_from = $('#price_from').val();
        let price_to = $('#price_to').val();

        if (parseInt(price_from)<=parseInt(price_to)) {
            get_string += "&price_from=" + price_from + "&price_to=" +price_to;
        }
        else {
            alert('Некорректные значения параметров');
        }

        let paramsString = document.location.search;
        let searchParams = new URLSearchParams(paramsString);


        document.location.href = "http://w90822zc.beget.tech"+document.location.pathname+get_string;
    }
}