如何在jquery ui日期选择器中禁用周末和选定日期？

$(function() {
  $("#datepicker").datepicker({
    beforeShowDay: function(date) {
      var day = date.getDay();
      // 禁用周六和周日
      return [(day != 0 && day != 6), ''];
    }
  });
});

$(function() {
  var disabledDates = ["2022-01-01", "2022-02-14", "2022-05-01"];
  
  $("#datepicker").datepicker({
    beforeShowDay: function(date) {
      var dateString = $.datepicker.formatDate('yy-mm-dd', date);
      // 禁用选定日期
      return [($.inArray(dateString, disabledDates) == -1), ''];
    }
  });
});