獲取當月有多少天
function getDaysInMonth(year,month){
nowmonth = parseInt(nowmonth,10)
var temp = new Date(nowyear,nowmonth,0)
return temp.getDate()
}
獲取n個月之前的日期
function GetPreMonthDay(date, monthNum) {
var dateArr = date.split('-')
var year = dateArr[0]
var month = dateArr[1]
var day = dateArr[2]
var days = new Date(year, month, 0)
days = days.getDate()
var year2 = year
var month2 = parseInt(month) - monthNum
if (month2 <= 0) {
year2 = parseInt(year2) - parseInt(month2 / 12 == 0 ? 1 : parseInt(month2) / 12)
month2 = 12 - (Math.abs(month2) % 12)
}
var day2 = day
var days2 = new Date(year2, month2, 0)
days2 = days2.getDate()
if (day2 > days2) {
day2 = days2
}
if (month2 < 10) {
month2 = '0' + month2
}
var t2 = year2 + '-' + month2 + '-' + day2
return t2
}
export default {
GetPreMonthDay
}