获取当前月的上一月的天数 

 1 function getEndDay(){
 2      //构造当前日期对象
 3    var date = new Date();
 4    var year = date.getFullYear();
 5     //获取当前月份
 6    var mouth = date.getMonth();
 7    var days;
 8    if (mouth == 2) {
 9        days = year %4 == 0 ? 29: 28;
10    }else if(mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 ||mouth == 8 ||mouth == 8 ||mouth == 12){
11        days = 31;
12    }else{
13        days = 30;
14    }
15    return year+"-"+ "0"+mouth+"-"+days; // 返回上个月的年-月-日
16 }
17 
18 
19 
20 
21 var date =new Date()
22 var year=date.getFullYear();
23 var month=date.getMonth()+1;  
24 var lastDay=new Date(year,month,0).getDate()//获得是标准时间,需要getDate()获得天数   上个月天数

 

posted @ 2020-08-05 14:15  comeOnTryAgain  阅读(321)  评论(0)    收藏  举报