text: export function getQueryParam(name, url) {
      if (!url) 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, " "));
  }
  