code: function buildProvince (countryNodeElement, provinceNodeElement, selectedValue) {
    var selectedOption = getOption(countryNodeElement, selectedValue);
    var provinces = JSON.parse(selectedOption.getAttribute('data-provinces'));
  
    provinceNodeElement.options.length = 0;
  
    if (provinces.length) {
      buildOptions(provinceNodeElement, provinces)
    }
  
    return provinces;
  }
docs: Builds the province selector