Regular expression for validating date in javascript

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The other issue is that regular expressions don’t deal directly with numbers. That’s because the characters for the digits 0 through 9 occupy consecutive positions in the ASCII and Unicode character tables.

You can’t tell a regular expression to “match a number between 1 and 31”, for instance. See Chapter 6 for more details on matching all kinds of numbers with regular expressions.

We use capturing groups here because you’ll probably want to capture the day and month numbers anyway.

The final two solutions are a little more complex, so we’re presenting these in both condensed and free-spacing form.

The regular expression is used to find the characters and then replace them with empty spaces.provides a declarative way of validating javascript objects.It is unit tested with 100% code coverage and can be considered fit for production.Because of this, you have to choose how simple or how accurate you want your regular expression to be.If you already know your subject text doesn’t contain any invalid dates, you could use a trivial regex such as cannot repeat more than two times or fewer than two times.

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