如何在javascript中检查日期在当前星期或当前月或下个月之内?

问题描述

我有一些朋友的生日，想按如下方式分开他们:

I have some friends' birthdays and want to separate them as follows :

• 本周内的生日(从当日开始的本周剩余天数内).
• 当月内的生日(从当日开始的当月剩余天数内).
• 下个月的生日.

所以我想知道如何在javascript中测试每个日期，以查看它是否在当前一周/当前月份/下个月的剩余日期之内.

So all I want to know how to test each date in javascript to see if it falls within the remaining days of the current week/current month/next month.

N.B:说我有m/d/Y(1990年6月29日)格式的日期.

N.B: say I have those dates in m/d/Y(06/29/1990) format.

谢谢

推荐答案

将日期和当前时间转换为 Date 对象，并将其用于比较.一些干式编码:

Convert your date and current time to Date object and use it for comparison. Some dry coding:

var now = new Date()
if (
   (check.getFullYear() == now.getFullYear()) &&
   (check.getMonth() == now.getMonth()) &&
   (check.getDate() >= now.getDate())
) {
   // remanining days in current month and today. Use > if you don't need today.
}

var nextMonth = now.getMonth() + 1
var nextYear = now.getFullYear()
if (nextMonth == 12) {
   nextMonth = 0
   nextYear++
}
if (
   (check.getFullYear() == nextYear) &&
   (check.getMonth() == nextMonth)
) {
   // any day in next month. Doesn't include current month remaining days.
}

var now = new Date()
now.setHours(12)
now.setMinutes(0)
now.setSeconds(0)
now.setMilliseconds(0)
var end_of_week = new Date(now.getTime() + (6 - now.getDay()) * 24*60*60*1000 )
end_of_week.setHours(23)
end_of_week.setMinutes(59)
end_of_week.setSeconds(59) // gee, bye-bye leap second
if ( check >=now && check <= end_of_week) {
   // between now and end of week
}

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