Validate phone number with JavaScript

Question

I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-

Answer 1

try this

/^[\+]?\d{2,}?[(]?\d{2,}[)]?[-\s\.]?\d{2,}?[-\s\.]?\d{2,}[-\s\.]?\d{0,9}$/im

valid formats:

1. (123) 456-7890
2. (123)456-7890
3. 123-456-7890
4. 123.456.7890
5. 1234567890
6. +31636363634
7. +3(123) 123-12-12
8. +3(123)123-12-12
9. +3(123)1231212
10. +3(123) 12312123
11. 075-63546725