JavaScript通过年月判断当月的天数，支持闰年

当具体的每月天数，根据月份联动显示 ，则需要判断该月是大月，还是小月，是闰年还是平年，具体实现方法如下：

function DaysInMonthAndYear(year, month) {
      month = parseInt(month, 10);
      var temp = new Date(year, month, 0);
      let n = +temp.getDate();
      let dataTimes = [];
      for (var i = 1; i < n + 1; i++) {
         dataTimes.push(i);
      }
      return dataTimes;
}
console.log(DaysInMonthAndYear(2000, 2));
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function DaysInMonthAndYear(year, month) {
      month = parseInt(month, 10);
      var temp = new Date(year, month, 0);
      let n = +temp.getDate();
      let dataTimes = [];
      for (var i = 1; i < n + 1; i++) {
         dataTimes.push(i);
      }
      return dataTimes;
}

console.log(DaysInMonthAndYear(2000, 2));