Validation Regex no spaces trailing, leading or inbetween

[Khalnayak]

Hi all,

I have a Validation regex for a field within a catalogue item. 

It currently does not allow the characters [^"();:<>]+ which works fine.

But now I need to prevent spaces being entered at the beginning, middle or end, how can I do this?

Can I add some characters to the current regular expressions field?

I 

Thanks in advance,

Usmaan.

[AEterni]

Feedback from support.

The PRB: PRB1460322 attached on the Case, has been reviewed by DEV team and they have closed it as "Working as Expected" for the following reason:

"The behavior: "Variable validation for Regex is not showing error in SP": is due to the form control input in Angular, which by default trims if the value contains any leading or trailing spaces as per the design of the Platform.
The only difference is it does not show any error."

[amIT152]

Hi Usmann,

Please try this: 

pattern = /^[0-9a-zA-Z]*$/;

Kindly mark this answer helpful and correct.

[Khalnayak]

does not work on leading and trailing spaces.