code: function getSerialisedData(){
      var data = this.getFormData();
  
      return data.length === 0 ? '' : '?' + data.map(function(f){
        return encodeURIComponent(f.name) + '=' + encodeURIComponent(f.value);
      }).join('&');
    }
docs: Returns a GET-like serialisation string of the form values.
  
  @api
  @returns {string}