javascript - Regex for validation numbers with commas and space -

i not sure why regex expression not working. want validate if input in format :

1. 12345678,12345678,12345678
2. *space*12345678 , 12345678 , 12345678 , 12345678
3. 12345678,12345678, space

must 8 digit if not return false. below regex expression did, working 2 sets of numbers when input set of numbers validation not working.

1. working: 12345678 , 12345678
2. not working: 12345678 , 12345678 ,12345678

var validate_numbers = /^\s*\d{8}\s*\+*(,\s*\d{8},*)?$/; 

thank you

you need describe want match in more detail. i'm going assume want match 8-digit nums delimited commas , pluses, possibly followed commas.

the problem you're taking @ 2 sets of digits. visualization.

given assumption above, regex want:

^(\s*\d{8}\s*[+,]?\s*)*$ 

again, can visualize on debuggex.