Angular regex validation

Question

User is going to input in the form and only allowed numbers separated by comma.

I want to allow space after comma but not before comma and white space anywhere else is fine. (I only want to add numbers not alphabets).

I want to use this in Angular Validator pattern like Validator, pattern ("[0-9,\s]+\s*$")

Correct: 1123, 1232312, 12323213, 13123213213

Wrong: 123 ,1232123 ,1221323123 , 12312313

I used this "[0-9,\s]+\s*$" but it's not allowing any space.

Answer 1

Your regex should be:

^(?:[0-9]+,\s)+(?:[0-9]+)$

With

• ^ - Starts with.

• (?:[0-9]+,\s) - A non-capturing group that contains at least one numeric character, followed by a comma (,) and whitespace (\s).

• + - At least one occurence for previous group.

  • Note: Could be replaced with * if want to match a group of numeric characters only for example: "1234".

• (?:[0-9]+) - A non-capturing group that contains at least one numeric character.

• $ - Ends with.

Demo @ regex101