Regex to validate textfield with csv format using javascript

Question

I tried with the following regular expression

/^([a-z0-9])+(,[a-z0-9]+)*$/

My text field string looks like the following csv format as

123,456,789,012

But the above expressions fails for me, main thing is whitespaces are not allowed with the given text field string.

@ Sujith PS (123, 234, 345) be a invalid pattern and {123,345,567} be a valid one — Pez
– Pez, Commented Jan 24, 2014 at 8:03
@Pez So you dont want to allow whitespace , right . what about ( ) and { } ?? — Sujith PS
– Sujith PS, Commented Jan 24, 2014 at 9:51

Sujith PS · Accepted Answer · 2014-01-24 09:58:03Z

4

If you want to validate textfield with value like csv format ,

you can use : /^([a-z0-9]+(?:,[a-z0-9]+)*)$/gm

Which will accept 123,456,789,012

And will reject 123, 456, 789, 012 // Those containing spaces
If you want to match something like this (num,num,num,num)

you can use :

/^($[a-z0-9]+(?:,[a-z0-9]+)*$)$/gm

Explanation :

enter image description here

answered Jan 24, 2014 at 9:58

Sujith PS

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Comments

ikaruss · Accepted Answer · 2014-01-24 05:41:14Z

1

If I understand you correctly, here's the version with white-spaces allowed:

var pattern = /^[a-z0-9]+(?:, ?[a-z0-9]+)*$/;
!!pattern.exec('123,456,789,012'); // true
!!pattern.exec('123, 456, 789, 012'); // true

answered Jan 24, 2014 at 5:41

ikaruss

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