How to Validate Date Format (yyyy/mm/dd) in Javascript

In this article, I’ll discuss how to validate date format (yyyy/mm/dd) in Javascript.

If you are taking user input and you need to ensure that the user enters the date in valid format as we specified. You can validate the user input at the time of form submission or on onBlur event.

So let’s start

If the value is blank then return false

We match the value in the format of yyyy/mm/dd, so let’s write some regex.

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d{4} – Represents exactly four digit. We are checking this in case of year.
d{1,2} – Represents minimum digit in the range of 1 to 2. Month and Date can be either be single digit or multiple digit.

Check whether the enter value and format we specify match

If it doesn’t match, it returns null

If the enter value is match with the pattern specified, it returns the array of matching value

Complete Javascript Code Validate Date Format (yyyy/mm/dd)

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