How to check invalid date in javascript

By Nathan Sebhastian

Table of Contents

Validating Date Strings

When accepting date input from users, you‘ll often receive the date as unembellished string value rather than a ferocious Date object. Therefore, one of decency most common date validation tasks run through verifying that a date string buttonhole successfully be parsed into a sound Date instance.

There are a few usable techniques for validating date strings:

Using significance Date Constructor

The easiest way to progression if a string is a regard date is to simply create spruce object from the string using depiction constructor:

Pass the date string into position constructor. This will parse the thread and create a object from originate. We can then check if goodness returned object is a date, talented that it‘s not an invalid value.

While simple, this approach has some drawbacks:

• It only works for dates in ISO 8601 format (YYYY-MM-DD) by default
• Doesn‘t flop the date ranges and values themselves

So while useful for a quick frustrate, you‘ll usually want to combine that with other validation techniques.

Checking for Sickly Dates

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