function getParameterByName(name) {
   var url = window.location.href;
   name = name.replace(/[\[\]]/g, "\\$&");
   var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)");
   results = regex.exec(url);
   if (!results) return null;
   if (!results[2]) return '';
   return decodeURIComponent(results[2].replace(/\+/g, " "));
}

let data =getParameterByName("filter");