Struggling with date validation as a new MomentJS user

Question

Looking to validate a date in string format using moment JS, I am encountering an issue.

Using the dd/mm/yy format in pCalendar in ngPrime, I store the date value in stDate.

Here is the code I have written:

var stDate = '02/02/2021';
var stDateMoment = moment(stDate, 'dd/mm/yy');

I'm puzzled as to why the expression

stDateMoment.isValid()

is returning a false value.

Any insights or suggestions on what might be causing this?

Appreciate your help!

Answer 1

Answer №1

You are on the verge of success. Remember that the format tokens are sensitive to case, meaning you should not use lowercase dd, mm, or yy.

const startDate = '02/02/2021';
const startDateMoment = moment(startDate, 'DD/MM/YYYY');

console.log(
  startDateMoment.isValid() 
);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

To learn more about this, please refer to the momentjs string format documentation.

The documentation also explains that two Ys represent two-digit years, while four Ys stand for four-digit years.

Answer 2

You are on the verge of success. Remember that the format tokens are sensitive to case, meaning you should not use lowercase dd, mm, or yy.

const startDate = '02/02/2021';
const startDateMoment = moment(startDate, 'DD/MM/YYYY');

console.log(
  startDateMoment.isValid() 
);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

To learn more about this, please refer to the momentjs string format documentation.

The documentation also explains that two Ys represent two-digit years, while four Ys stand for four-digit years.

Answer 3

To resolve the problem, you can create a Date Object for the formatted date provided

var newDate = new Date("02/02/2021");
var newDateMoment = moment(newDate,"DD/MM/YY");
const checkValidity = newDateMoment.isValid(); // returns true

Answer 4

To resolve the problem, you can create a Date Object for the formatted date provided

var newDate = new Date("02/02/2021");
var newDateMoment = moment(newDate,"DD/MM/YY");
const checkValidity = newDateMoment.isValid(); // returns true