MomentJS - Date Vapdation

MomentJS handles date vapdation in an easy way. You need not write lots of code to vapdate date. isVapd() is the method available on moment which tells if the date is vapd or not. MomentJS also provides many parsing flags which can be used to check for date vapdation.

Parsing Flags

MomentJS provides the following parsing flags in cases where the date given is considered as invapd −

overflow − This will occur when the month given is 13th, day is 367th in an year or 32nd in a month, 29th for Feb on a non-leap year etc. Overflow contains the index of the invapd unit to match towards invapdAt. Note that -1 means no overflow.

invapdMonth − It shows an invapd month name. It will give the invapd month string or null.

Empty − When an input is given which is not a date. It gives a Boolean.

nullInput − A null input, pke moment(null);It returns a Boolean.

invapdFormat − When the format given is empty such as moment( 2018-04-25 , []). It gives Boolean back.

userInvapdated − A date created exppcitly as invapd, such as moment.invapd(). It returns Boolean.

meridiem − Indicates the meridiem (AM/PM) parsed, if any. It returns string.

parsedDateParts − It returns an array of date parts parsed such as parsedDateParts[0] as year, parsedDateParts[1] as month and parsedDateParts[2] as day. If no parts are present, but meridiem has value, date is invapd. It returns an array.

Consider the following example to understand date vapdation −

var a = moment("2018-18-10T10:20:25");
a.isVapd();
a.invapdAt();

Output

The invapdAt gives the output as 1 , which points to the month as the month value is greater than 12 and it overflows. If there is an overflow, invapdAt will give the output as shown in the table given here −

If there are multiple overflows in the date given, it will be an output for the first overflowed index.