[英]Validating the last date of a month
我有兩個函數來計算用戶輸入的月份的最后日期
var effectiveAsOfDateYear = document.forms[0].effectiveAsOfDateYear.value;
var effectiveAsOfDateMonth = document.forms[0].effectiveAsOfDateMonth.value;
var effectiveAsOfDateDay = document.forms[0].effectiveAsOfDateDay.value;
userEnteredDate = effectiveAsOfDateDay;
userEnteredMonth = effectiveAsOfDateMonth;
// **Then using if condition**
if (!isLastDayOfMonth(userEnteredDate, userEnteredMonth)) {
alert("Inside isLastDayOfMonth of continueUploadReportAction ");
// Do something
}
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// The function is defined as below **strong text**
function isLastDayOfMonth( date, month ) {
alert("Inside isLastDayOfMonth, the date is " + date );
alert("Inside isLastDayOfMonth, the month is " + month );
return ( date.toString() == new Date( date.getFullYear(), month, 0, 0, 0, 0, 0 ).toString() );
}
但是,在運行時,當我將月份選擇為7並將日期選擇為24時,傳遞給isLastDayOfMonth
函數的實際值是alert("Inside isLastDayOfMonth, the date is " + date );
為6且alert("Inside isLastDayOfMonth, the month is " + month );
是24,返回似乎永遠都不正確。
請提出一個更好的方法..
如果您有一個JavaScript“ Date”對象,則可以檢查是否是一個月的最后一天,如下所示:
function isLastDayOfMonth(d) {
// create a new date that is the next day at the same time
var nd = new Date(d.getTime());
nd.setDate(d.getDate() + 1);
// Check if the new date is in the same month as the passed in date. If the passed in date
// is the last day of the month, the new date will be "pushed" into the next month.
return nd.getMonth() === d.getMonth();
}
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