选择时间
1 lastMonthTime(){ //30天前
2 this.timeList(30)
3 },
4 timeList(Xday){ //获取时间
5 let myDate = new Date(); //时间
6 let year = myDate.getFullYear() //年
7 let month = myDate.getMonth()+1 //月
8 let day = myDate.getDate() //日
9 if(Xday<day){
10 day = day - Xday
11 }else if(Xday == day){
12 month = month - 1
13 if(month < 1){
14 year = year - 1
15 month = 12
16 }
17 if([1,3,5,7,8,10,12].includes.month){
18 day = 31
19 }else{
20 day = 30
21 }
22 }else if(Xday>day){
23 month = month - 1
24 if(month < 1){
25 year = year - 1
26 month = 12
27 }
28 if([1,3,5,7,8,10,12].includes.month){
29 day = 31 - (Xday-day)
30 }else{
31 day = 30 - (Xday-day)
32 }
33 }
34 let hours = myDate.getHours() //时
35 let minutes = myDate.getMinutes() //分
36 let seconds = myDate.getSeconds() //秒
37 return year+'-'+month+'-'+day
38 },