如何在javascript中检查日期在当前周或当月或下个月内？

Question

我有一些朋友的生日，想把他们分开如下：

• 本周内的生日（从当天开始的本周剩余天数内）。
• 当月内的生日（从当天开始的当月剩余天数内）。
• 下个月内的生日。

所以我只想知道如何在 javascript 中测试每个日期，看看它是否在当前周/当月/下个月的剩余天数内。

注意：假设我有 m/d/Y(06/29/1990) 格式的日期。

谢谢

Answer 1

将您的日期和当前时间转换为Date对象并将其用于比较。一些干编码：

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
}