关于javascript:根据年月判断总共天数和判断周次

//依据年月判断总共天数      getDaysInMonth(year, month) {         month = parseInt(month, 10);          var temp = new Date(year, month, 0);         return temp.getDate();      },//依据年月日判断周次     getWeek(year,month,day){        month = parseInt(month, 10);                 day = parseInt(day, 10);         let week = new Date(year+"/"+month+"/"+day).getDay();        return week     }     //week:0=>周日          //week:1=>周一     //week:2=>周二     //week:3=>周三          //week:4=>周四     //week:5=>周五          //week:6=>周六