最近要在页面上加一个时间段的选择控件，便上网搜寻一番，但找到的答案大都没有考虑时间段跨年的情况，所以做了些修改
本周的开始和结束日期
|
1
2
3
4
5
6
7
8
9
|
//当前日期var
now = new
Date();
//今天是一周的第几天var
nowDayForWeek = now.getDay() === 0 ? 7 : now.getDay();
var
oneDay = 1000 * 60 * 60 * 24;
//本周开始日期var
weekStartDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 1));
//本周结束日期(本周开始日期 + 6天)var
weekEndDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 7));
|
|
1
2
3
4
|
//上周开始日期(当前日期 - 7天 - 今天是一周的第几天)var
lastWeekStartDay = new
Date(now.getTime() - oneDay * (nowDayForWeek + 6));
//上周结束日期(当前日期 - 今天是一周的第几天)var
weekEndDay = new
Date(now.getTime() - oneDay * (nowDayForWeek - 7));
|
|
1
2
3
4
5
6
7
8
9
10
11
12
|
var
nowMonth = now.getMonth();
var
nowYear = now.getFullYear();
function
getMonthDays (year, month){
var
monthStartDay = new
Date(year, month, 1);
var
monthEndDate = new
Date(year, month + 1, 1);
var
days = (monthStartDay - monthEndDate) / oneDay;
return
days;
}//本月开始日期var
monthStartDay = new
Date(nowYear ,nowMonth ,1);
//本月结束日期var
monthEndDay = new
Date(nowYear ,nowMonth ,getMonthDays(nowYear ,nowMonth));
|
|
1
2
3
4
5
6
|
var
lastMonth = (nowMonth - 1) === -1 ? 11 : (nowMonth -1);
var
lastMonthYear = lastMonth === 11 ? (nowYear -1) : nowYear;
//上月开始日期var
lastMonthStartDay = new
Date(lastMonthYear ,lastMonth ,1);
//上月结束日期var
lastMonthEndDay = new
Date(lastMonthYear ,lastMonth ,getMonthDays(lastMonthYear ,lastMonth));
|
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
function
getQuarterStartMonth (month){
var
quarterStartMonth = 0;
if(month < 3){
quarterStartMonth = 0;
}
if(2 < month && month < 6){
quarterStartMonth = 3;
}
if(5 < month && month < 9){
quarterStartMonth = 6;
}
if(8 < month){
quarterStartMonth = 9;
}
return
quarterStartMonth;
}//本季度开始日期var
quarterStartday= new
Date(nowYear ,getQuarterStartMonth(nowMonth),1);
//本季度结束日期var
quarterEndday= new
Date(nowYear ,getQuarterStartMonth(nowMonth) + 2 ,getMonthDays(nowYear ,getQuarterStartMonth(nowMonth) + 2));
|
|
1
2
3
4
5
6
|
var
lastQuarterMonth = (getQuarterStartMonth(nowMonth) - 3) < 0 ? 9 : getQuarterStartMonth(nowMonth - 3);
var
lastQuarterYear = lastQuarterMonth === 9 ? nowYear - 1 : nowYear;
//上季度开始日期var
lastQuarterStartday = new
Date(lastQuarterYear ,lastQuarterMonth ,1);
//上季度结束日期var
lastQuarterEndday = new
Date(lastQuarterYear ,lastQuarterMonth + 2 ,getMonthDays(lastQuarterYear ,lastQuarterMonth + 2);
|