Looking for some help on regex expression for below use case.
My input field should allow only comma separated values of either just digits, or a sequence of special characters (*) followed by digits. It should able to allow below combinations:
1234,***1234,3456
***1234,***3456,12345567
1234,3456
***1234,***3456
The digits only case can have max 10 digits. The case with special characters and digits should have 3 asterisks followed by 4 digits.
This validates a string of comma separated items, where each item is either a number of up to 10 digits, or three * followed by a 4 digit number:
/^(?:\d{1,10}|\*{3}\d{4})(?:,(?:\d{1,10}|\*{3}\d{4}))*$/
Explanation:
^ - anchor at start of string(?: - non capture group start
\d{1,10} - 1 to 10 digits| - logical OR\*{3}\d{4} - three * followed by 4 digits) - non capture group end(?: - non capture group start
,(?:\d{1,10}|\*{3}\d{4}) - a comma, followed by same ORed pattern as above)* - non capture group end, whole group has zero to many repetitions$ - anchor at end of string