I'm having trouble using pattern matching with RegEx for client-side validation. No problem with the other validations so far.
I need to make sure users search for a particular pattern in a code - 4 digits that can include leading zeros for example: 0004 , 0104

I thought that this expression would do it: \d{4}
but no validation occurs. \d\d\d\d lets everything thru as well.
Then I tried quite a few other simple regexes to test the system but all entries are accepted.

Hi David,
As per your pattern you should use: (^([0-9]{4})$)

Hi Teodor

(^([0-9]{4})$) or ^[0-9]{4}$ still lets anything thru.
For example I can enter "xyz" and the input field does not reject with an error message.

As I said earlier, I've also tested a few other simple regexes with this input field and nothing is rejected.

Number Validation validates perfectly, but obviously with no leading zeros.

Hello David,
With the validation pattern i provided "xyz" does not get through ....

Thanks Teodor - working now.
In all my troubleshooting, I managed to delete the type = "text" attribute.
Added this back then it validates. But if the input tag does not have a type attribute, it should default to "text" anyway.
Dave

Pattern matching with RegEx (Regular Expressions) allows you to search for specific patterns within text or data. By using RegEx, you can find and extract information that matches a certain pattern, helping in tasks like data validation and text parsing. To sell art as an NFT, create a digital wallet on a reputable NFT marketplace. Then, mint your artwork as an NFT by uploading it to the platform and adding relevant details and metadata. Finally, list your NFT for sale, setting a price and waiting for potential buyers to make a purchase using cryptocurrency.