獲取當月剩余天數

兩種方式。直接上代碼：

getRemainDays(){
            var today = new Date();
            var now = today.getDate();
            var year = today.getYear();
            if (year < 2000) year += 1900;
            var month = today.getMonth();
            var monarr = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
            if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)) monarr[1] = "29";
            return monarr[month]-now;
        },

 getTime(){
             /*剩余天數*/
            var surplusDays;
            //總天數
            var dayToal;
            //當前日期
            var date = new Date();
            //當前天數
            var curTime = new Date().getDate();
            var year = date.getFullYear();
            var mouth = date.getMonth() + 1;
            if(mouth == 2){
                dayToal= year % 4 == 0 ? 29 : 28;  
            }else if(mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12){
                dayToal= 31;
            }else{
                dayToal= 30;
            }
            surplusDays = dayToal - curTime;
            return surplusDays;
        }